Objective The rising prevalence of childhood obesity is closely associated with suboptimal dietary patterns.To address this public health concern,we conducted a comprehensive study to examine the association between c...Objective The rising prevalence of childhood obesity is closely associated with suboptimal dietary patterns.To address this public health concern,we conducted a comprehensive study to examine the association between coarse cereals consumption and body fat percentage(BFP)in Chinese children and adolescents.Methods The study included 48,305 children aged 6–17 years from 28 districts/counties in 14 provinces across seven regions of China(24,152 girls and 24,153 boys).BFP was examined using bioelectrical impedance analysis in the early morning.Coarse cereals consumption was assessed using a Food Frequency Questionnaire and categorized into three groups:0 g/1,000 kcal per day,0–10 g/1,000kcal per day,and>10 g/1,000 kcal per day(daily consumption of coarse cereals×1,000/total energy consumption).Quantile regression model was used to analyze the association between coarse cereals and BFP,adjusting for potential confounders such as age,pubertal development stage,urban/rural and regional factors,total daily dietary energy consumption,sedentary time,moderate-to-high physical activity,household income,parental education,and consumption of other foods.Results Boys aged 6–10,11–14,and 15–17 years had median daily coarse cereals consumptions of6.6 g,7.1 g,and 5.7 g,with BFP of 19.6%,19.5%,and 17.5%(all P<0.05).Girls in the same age groups showed consumption of 7.1 g,8.4 g,and 6.7 g,with BFP of 20.3%,26.4%,and 31.0%(all P<0.05).The quantile regression results for boys showed that daily consumption of coarse cereals was significantly correlated with their BFP in the 0.15,0.25,and 0.50 quartiles,with regression coefficients of-0.257,-0.221,and-0.330,respectively,after adjusting for potential confounders(P<0.05).For girls,there was a significant correlation with PBF at the 0.05,0.15,0.25,0.50,0.75,and 0.85 quartiles,with regression coefficients of-0.258,-0.366,-0.372,-0.431,-0.472,and-0.503(P<0.05 for all).Conclusions Coarse cereals consumption among Chinese children and adolescents remains relatively low.Higher consumption was inversely associated with BFP in children aged 6–17 years.Future interventional studies should assess how increased coarse cereals consumption prevents childhood obesity.展开更多
BACKGROUND We previously demonstrated that the antibody against programmed cell death protein 1 ligand 1(PDCD1 LG1)is a promising new marker of programmed death-ligand 1(PD-L1)expression that correlates with both brea...BACKGROUND We previously demonstrated that the antibody against programmed cell death protein 1 ligand 1(PDCD1 LG1)is a promising new marker of programmed death-ligand 1(PD-L1)expression that correlates with both breast cancer(BC)clinicopathological characteristics and tumor sensitivity to chemotherapy.However,the concordance of PDCD1 LG1 expression scoring with immunohistochemical(IHC)tests approved for clinical use and with the polymerase chain reaction(PCR)method has not been previously studied.AIM To evaluate the concordance of methods for assessing PD-L1 expression,IHC tests with anti-PD-L1(PDCD1 LG1)and anti-PD-L1(SP142)antibodies and PCR.METHODS This prospective single-center observational cohort study included 148 patients with BC.PD-L1 expression in immune cells was assessed by the IHC method with anti-PD-L1(PDCD1 LG1)and anti-PD-L1(SP142)antibodies and by PCR.The concordance of PD-L1 scores between tests was assessed with positive percentage agreement(PPA)and negative percentage agreement(NPA).The strength of the agreement between the methods was calculated via the Cohen kappa index.P<0.05 was considered statistically significant.RESULTS Regardless of the method used to assess marker expression,PD-L1 expression was significantly more often detected in patients with negative estrogen receptor status,human epidermal growth factor receptor-2-positive(HER2+)status,luminal B HER+BC,nonluminal HER+BC and triple-negative BC.PPA and NPA were 38.3%and 70.4%,respectively,for PD-L1(PDCD1 LG1)and PD-L1(SP142);26.3%and 63.3%,respectively,for PD-L1(PDCD1 LG1)and PD-L1(PCR);and 36.5%and 74.4%,respectively,for PD-L1(SP142)and PD-L1(PCR).Cohen's kappa index for PD-L1(PDCD1 LG1)and PD-L1(SP142)was 0.385(95%CI:0.304–0.466),that for PD-L1(PDCD1 LG1)and PD-L1(PCR)was 0.207(95%CI:0.127–0.287),and that for PD-L1(SP142)and PD-L1(PCR)was 0.389(95%CI:0.309–0.469).CONCLUSION Thus,all three markers of PD-L1 expression are associated with the characteristics of aggressive BC,demonstrating moderate concordance between the tests.展开更多
As the first gold mine discovered at the sea in China and the only coastal gold mine currently mined there,Sanshandao Gold Mine faces unique challenges.The mine's safety is under continual threat from its faulted ...As the first gold mine discovered at the sea in China and the only coastal gold mine currently mined there,Sanshandao Gold Mine faces unique challenges.The mine's safety is under continual threat from its faulted structure coupled with the overlying water.As the mining proceeds deeper,the risk of water inrush increases.The mine's maximum water yield reaches 15000 m3/day,which is attributable to water channels present in fault zones.Predominantly composed of soil–rock mixtures(SRM),these fault zones'seepage characteristics significantly impact water inrush risk.Consequently,investigating the seepage characteristics of SRM is of paramount importance.However,the existing literature mostly concentrates on a single stress state.Therefore,this study examined the characteristics of the permeability coefficient under three distinct stress states:osmotic,osmotic–uniaxial,and osmotic–triaxial pressure.The SRM samples utilized in this study were extracted from in situ fault zones and then reshaped in the laboratory.In addition,the micromechanical properties of the SRM samples were analyzed using computed tomography scanning.The findings reveal that the permeability coefficient is the highest under osmotic pressure and lowest under osmotic–triaxial pressure.The sensitivity coefficient shows a higher value when the rock block percentage ranges between 30%and 40%,but it falls below 1.0 when this percentage exceeds 50%under no confining pressure.Notably,rock block percentages of 40%and 60%represent the two peak points of the sensitivity coefficient under osmotic–triaxial pressure.However,SRM samples with a 40%rock block percentage consistently show the lowest permeability coefficient under all stress states.This study establishes that a power function can model the relationship between the permeability coefficient and osmotic pressure,while its relationship with axial pressure can be described using an exponential function.These insights are invaluable for developing water inrush prevention and control strategies in mining environments.展开更多
Background Genitourinary cancers constitute a significant portion of the global cancer burden and have emerged as a prominent cause of cancer-related mortality.However,there remains a paucity of up-to-date statistical...Background Genitourinary cancers constitute a significant portion of the global cancer burden and have emerged as a prominent cause of cancer-related mortality.However,there remains a paucity of up-to-date statistical analyses that meticulously examine the global and national shifts in the epidemiology of genitourinary cancers.Our study aimed to provide a comprehensive understanding of the global distribution and progression of genitourinary cancers through analyses of the recently updated 2021 Global Burden of Disease(GBD)database.Methods This study presented the incidence,mortality,disability-adjusted life years(DALYs),and their respective age-standardized rates for four genitourinary cancers(bladder,kidney,prostate,and testicular cancers)by sex,age,and location from 1990 to 2021.Estimates for these data were presented with their 95%uncertainty intervals(UIs).Estimated annual percentage changes(EAPCs)and Bayesian Age-Period-Cohort(BAPC)models were utilized to further quantify the temporal dynamics of age-standardized rates(ASRs)in genitourinary cancers.Countries and territories were categorized according to socio-demographic index(SDI)quintiles.Results Globally,with the exception of a sustained decline in age-standardized incidence rates(ASIRs)for bladder cancer(EAPC=−0.36%),the ASIRs for kidney,prostate,and testicular cancers demonstrated an upward trend from 1990 to 2021(EAPC=0.53%,0.20%,and 1.43%,respectively).In terms of geographical regions,High-income North America had the highest ASIRs for both bladder(13.98 per 100,000 persons[95%UI,12.96 to 14.61])and prostate(47.02 per 100,000 persons[95%UI,44.47 to 49.04])cancers.Southern Latin America recorded the highest ASIRs for kidney(13.44 per 100,000 persons[95%UI,12.27 to 14.73])and testicular(4.98 per 100,000 persons[95%UI,4.33 to 5.72])cancers.Additionally,Central Europe(1.25%[95%CI,1.12%to 1.38%]),East Asia(2.40%[95%CI,2.21%to 2.59%]),Eastern Europe(3.74%[95%CI,3.55%to 3.92%]),and the Caribbean(5.52%[95%CI,4.32%to 6.74%])exhibited the highest EAPCs for bladder,kidney,prostate,and testicular cancers,respectively.Unlike the ASIRs,age-standardized mortality rates(ASMRs)and age-standardized DALYs rates(ASDRs)showed a downward trend over time in all types of genitourinary cancers.The disease burdens of bladder,kidney,and prostate cancers were primarily distributed among older men,while testicular cancer mainly occurred in young men.Smoking remained the primary risk factor for bladder cancer.Meanwhile,high fasting plasma glucose and high body-mass index exerted increasingly significant impacts on bladder and kidney cancers,respectively,during the study period.Projections to 2050 suggest that the global burdens of genitourinary cancers are expected to decline to varying degrees.However,regional disparities in genitourinary cancer burdens are projected to persist.Conclusions Although the results demonstrate a marginal decline in ASRs caused by genitourinary cancers,they still impose a considerable global burden and result in numerous deaths.Our study obtained and analyzed the latest epidemiological data of genitourinary cancers from the GBD 2021,offering valuable information for national healthcare professionals and policymakers to optimize resource allocation,manage costs more efficiently,and develop practical healthcare policies.展开更多
Objective:To explore the relationship between obesity,body fat percentage(BF%),blood lipid levels,and prediabetes.Methods:A total of 91 patients with prediabetes who visited the hospital from February 2024 to February...Objective:To explore the relationship between obesity,body fat percentage(BF%),blood lipid levels,and prediabetes.Methods:A total of 91 patients with prediabetes who visited the hospital from February 2024 to February 2025 were included in the observation group,and 90 healthy individuals with normal blood glucose levels during the same period were included in the control group.Physical examination,body fat percentage,and biochemical indicators were checked,and the relationship between these indicators and prediabetes was analyzed.Results:The observation group had higher body weight(BW),waist circumference(WC),body mass index(BMI),fat mass(FM),total cholesterol(TC),low-density lipoprotein(LDL),triglycerides(TG),fasting blood glucose(FBG),and 2-hour postprandial blood glucose(2hPG)compared to the control group,with P<0.05.The detection rates of obesity,abnormal WC,abnormal body fat percentage(BF%),abnormal TC,abnormal TG,and abnormal LDL were higher in the observation group than in the control group,with P<0.05.Multivariate logistic regression analysis showed that WC,TC,TG,BF%,and BMI were independent high-risk factors for prediabetes,with P<0.05.Conclusion:Obesity and dyslipidemia are high-risk factors for prediabetes.Scientific dietary planning and weight management should be implemented to reduce the incidence of diabetes.展开更多
To the Editor,We have read the article by Gener-Ricos et al.titled"NPM1-mutated myeloid neoplasms are a unique entity not defined by bone marrow blast percentage",published in Cancer[1].This retrospective,cr...To the Editor,We have read the article by Gener-Ricos et al.titled"NPM1-mutated myeloid neoplasms are a unique entity not defined by bone marrow blast percentage",published in Cancer[1].This retrospective,cross-sectional pilot study provides valuable insights into the clinicopathological features and treatment outcomes of patients with NPM1-mutated myeloid neoplasms(MNs)with less than 20%bone marrow blasts[1].展开更多
The oilseed crop Camelina sativa exhibits salinity tolerance,but the effects on early growth stages across a range of different salts and in combination with salicylic acid(SA)have not been thoroughly evaluated.In thi...The oilseed crop Camelina sativa exhibits salinity tolerance,but the effects on early growth stages across a range of different salts and in combination with salicylic acid(SA)have not been thoroughly evaluated.In this study,seeds were germinated in varying concentrations of six salts(NaCl,CaCl_(2),ZnCl_(2),KCl,MgSO_(4),and Na2SO_(4))with or without 0.5 mM SA.Using the halotime model,we estimated salt thresholds for germination and parameters of seedling growth.Germination and seedling growth parameters of camelina significantly decreased with increasing salt concentration across all salt types.Salts containing Zn and SO_(4) were most detrimental to germination and seedling growth.Except for KCl,0.5 mM SA generally reduced the salinity tolerance threshold(Saltb(50))of camelina.Specifically,Saltb(50)was 21.5%higher for KCl and 16.1%,25.0%,54.9%,21.0%,and 5.6%lower for CaCl_(2),NaCl,MgSO_(4),Na2SO_(4),and ZnCl_(2),respectively,when 0.5 mM SA was compared to 0 mM SA.Furthermore,camelina seedling growth was consistently more sensitive than germination across all salt types.SA did not significantly enhance germination or seedling growth and was harmful when combined with certain salts or at the germination stage.It can be concluded that both the type of salt and the concentration of SA are as critical as the salt concentration in saline irrigation water.展开更多
Objective:This study aims to estimate the thyroid cancer(TC)burden and trends from 1990 and 2021 among working-age population(WAP),at the global,regional,and national levels.Methods:Based on the Global Burden of Disea...Objective:This study aims to estimate the thyroid cancer(TC)burden and trends from 1990 and 2021 among working-age population(WAP),at the global,regional,and national levels.Methods:Based on the Global Burden of Disease 2021 study,this cross-sectional study included data on TC incidence and mortality for WAP aged 15-64 years across 204 countries and territories from 1990 to 2021.The age-standardized incidence rate(ASIR)and age-standardized mortality rate(ASMR)of TC were used to estimate the disease burden.Temporal trends of ASIR and ASMR were estimated by average annual percentage changes(AAPCs)based on age-period-cohort models.Relative inequality of TC burden across 204 countries was estimated by the slope index of concentration index.Results:Globally,ASIR of TC increased from 2.27 per 100,000 population to 3.41 per 100,000 population from1990 to 2021,with AAPC of 1.59%[95%confidence interval(95%CI):1.54,1.64];in contrast,ASMRs were stable at 0.31 per 100,000 population.Females had a higher disease burden than males,and adults aged 45-64 years accounted for more than 55%of the TC cases.Across regions and countries,North Africa and Comoros experienced the highest increase in ASIR,with AAPCs of 2.97%and 7.73%,respectively.All socio-demographic index(SDI)regions experienced a significant increase in ASIR,and regions with high and high-middle SDI experienced a significant decrease in ASMR.Global ASIR burden and ASMR burden were revealed to be concentrated mainly in higher-SDI and lower-SDI countries,respectively,with the concentration index in both sexes of 0.16(95%CI:0.13,0.19)and-0.14(95%CI:-0.18,-0.10)in 2021.Conclusions:Over the past three decades,the incidence burden of TC among the global WAP remarkably increased.International and regional policies for TC controls are supposed to be updated timely,to handle the current increasing burden and geographic disparities among WAP.展开更多
公开(公告)号:US12242011B2 Method for estimating water saturation in gas reservoirs using acoustic log P-wave and S-wave velocites利用声波测井纵波和横波速度估算气藏含水饱和度的方法摘要:The present application relates t...公开(公告)号:US12242011B2 Method for estimating water saturation in gas reservoirs using acoustic log P-wave and S-wave velocites利用声波测井纵波和横波速度估算气藏含水饱和度的方法摘要:The present application relates to new systems and methods of quantifying hydrocarbon saturation using measured acoustic logs.The methods and systems herein can accurately quantify the water saturation and hydrocarbon percentage in a low resistivity low contrast shaly sand reservoir where previous methods would indicate the reservoir was wet.In an embodiment,the disclosed system utilizes acoustic logging equipment or tools and techniques to transmit and/or record acoustic signals.Acoustic logging equipment operates by generating acoustic signals and detecting the acoustic signals after the acoustic signals pass through one or more geologic formations.展开更多
BACKGROUND Chronic obstructive pulmonary disease(COPD)is a progressive respiratory condition often associated with a high incidence of osteoporosis.Studies indicate that patients with COPD present with a significant d...BACKGROUND Chronic obstructive pulmonary disease(COPD)is a progressive respiratory condition often associated with a high incidence of osteoporosis.Studies indicate that patients with COPD present with a significant decrease in bone mineral density(BMD),potentially related to inflammation and corticosteroid use.AIM To investigate the relationship between BMD and lung function,mainly the forced expiratory volume in the forced expiratory volume in 1 second(FEV1)/forced vital capacity percentage(FVC%),in patients with COPD using quantitative computed tomography(QCT).METHODS This prospective cross-sectional study included 85 patients with COPD treated at Gansu Provincial People's Hospital.Exposure variables included lung function parameter(FEV1/FVC%),age,sex,body mass index,smoking status,tea-drinking habits,and physical activity.BMD was measured using QCT.Linear regression and generalized additive models were employed to analyze the relationship between exposure variables and BMD.RESULTS Linear regression analysis revealed a significant positive relationship between BMD and FEV1/FVC%(β=0.1,95%confidence interval[CI]:0.1-0.1;P<0.0001).Non-linear analysis identified a unique BMD breakpoint of 128.08 mg/cm³.Before the breakpoint,BMD was significantly positively correlated with FEV1/FVC%(β=0.245;P=0.0019);while after the breakpoint,the relationship was negative and showed no statistical significance(β=-0.136;P=0.0753).This finding underscores the critical role of BMD in COPD management and highlights the importance of individualized clinical interventions in improvement of lung function and overall health status in patients.CONCLUSION There is a complex non-linear relationship between BMD and lung function in patients with COPD,highlighting the importance of monitoring change in bone density during the management of COPD.展开更多
A study was conducted to determine the physiological characteristics changes of Aesculus chinensis seeds during natural dehydration in 2003. The results showed that A. chinensis seeds were recalcitrant with being high...A study was conducted to determine the physiological characteristics changes of Aesculus chinensis seeds during natural dehydration in 2003. The results showed that A. chinensis seeds were recalcitrant with being highly desiccation-sensitive. The seed moisture content of fresh fruits was higher than 60%. When the seeds were naturally dried for 30 days, their moisture content declined to 30.2% and their viability was completely lost. The seed germination percentage had a small increase at the beginning of desiccation and then decreased rapidly. The relative electrical conductivity of the A. chinensis seeds increased along with a decrease in seed moisture content. However, there was an abnormal increase in relative electrical conductivity when the seed moisture content was between 53.7% and 50.9%. Superoxide dismutase （SOD） activity decreased rapidly in the period of desiccation except for an abnormality when the seed moisture content was between 53.7% and 50.9%. Malondialdehyde （MDA） content increased slowly at the early stage of desiccation and then rose rapidly after the moisture content was below 50.9%. The soluble sugar content in seeds slowly increased with the increasing period of desiccation. The seed germination percentage was at the high level when seed moisture content was in range of 47%- 60%, which suggests that this was the optimum moisture content for maintaining A. chinensis seed viability.展开更多
[Objective] This study aimed to explore the effects of nitrogen fertigation rate on the protein components in grains and processing quality of different wheat varieties. [Method] Under the condition of higher soil fer...[Objective] This study aimed to explore the effects of nitrogen fertigation rate on the protein components in grains and processing quality of different wheat varieties. [Method] Under the condition of higher soil fertility, different amounts of N-fertilizer were applied in the plots, and then the contents of total protein and its components, percentage of the component content to total protein content as well as the processing quality of grains of two strong-gluten wheat varieties （Linyou145 and Zhengmai9023） and two weak-gluten wheat varieties （Ningmai9 and Baofeng949） were determined. [Result] The contents of total protein and globulin, gliadin and glutenin were improved significantly with the increase of the N-fertilizer amount; but the content of albumin did not show remarkable increase; in addition, the percentage of each protein component was relative stable and did not increase significantly. Increase in the amount of N-fertilizer improved the sedimentation value, wet gluten content, loaf volume and loaf score, decreased the volume weight of grain. [Conclusion] This study provideed theoretical support for high-quality wheat production.展开更多
To understand the dynamics of added nitrogen (N) in alpine meadow and the role of alpine plants and soil microorganisms in the retention of deposited N, the fate of 15 N labeled nitrate and ammonium salts was...To understand the dynamics of added nitrogen (N) in alpine meadow and the role of alpine plants and soil microorganisms in the retention of deposited N, the fate of 15 N labeled nitrate and ammonium salts was determined in an alpine meadow for two months. Two weeks after 15 N application, total recovery of 15 N from NO - 3_ 15 N was 73.5% while it was 78% from NH + 4_ 15 N. More 15 N was recovered in plants than in soil organic matter or in microbial biomass, irrespective of forms of N added. After one month, 70.6% of added NO - 3_ 15 N and 57.4% of NH + 4_ 15 N were recovered in soils and plants. 15 N recovered in soil organic matter decreased greatly while that recovered in plants varied little, irrespective of the form N. Compared with the results of two weeks after 15 N application, more NO - 3_ 15 N than NH + 4_ 15 N was recovered in microbial biomass. Total recovery was 58.4% (six weeks) and 67% (eight weeks) from NO - 3_ 15 N, and 43.1% and 49% from NH + 4_ 15 N, respectively. Both plants and soil microorganism recovered more NO - 3_ 15 N than NH + 4_ 15 N. But plants recovered more 15 N than soil microorganisms. During the whole experiment plants retained more NO - 3_N and 15 N than soil microorganisms while 15 N recovered in inorganic N pool did not exceed 1% due to lower amount of inorganic N. This indicates that plants play more important roles in the retention of deposited N although microbial biomass can be an important sink for deposited N in early days after N application.展开更多
For studying the germplasm charactedsUcs and carcass traits of Changtai yak, 8 adult yaks （5 male, 3 female） were selected and tested. The results showed that the pre-slaughter weight of the adult male and female Ch...For studying the germplasm charactedsUcs and carcass traits of Changtai yak, 8 adult yaks （5 male, 3 female） were selected and tested. The results showed that the pre-slaughter weight of the adult male and female Changtai yak was 364.32 and 266.83 kg, respectively, which presented extremely significant difference （P〈0.01）. The carcass weight, net bone weight net meat weight, and the ratio of bone to meat also showed extremely significant difference （P〈O.01）, which were 186.60 and 125.67 kg, 39.74 and 25.00 kg, 147.84 and 100.83 kg, 1：3.73 and 1： 4.03, respectively. The dressing percentage had significant difference which was 51.15% and 49.34%, respectively （P〈0.05）. The neat meat percentage and carcass meat production rate showed no significant difference which were 40.54% and 37.66%, 79.29% and 80.24%, respectively （P〉0.05）. It indicated that Changtai yak has better growth performance and meat performance potential, and worth of further studying and breeding.展开更多
Five forest landscapes in the maps of forest distribution in Heilongjiang Province in 1896 and 1986 were digitized and analyzed through GIS software. The results show that during the 90 years the total patch areas for...Five forest landscapes in the maps of forest distribution in Heilongjiang Province in 1896 and 1986 were digitized and analyzed through GIS software. The results show that during the 90 years the total patch areas for Picea and Abies forest, Pinus sylvestris var. mongolica Litvin forest and Pinus koraiensis Sieb. et Zucc. forest had decreased about 87%, 40% and 84%, respectively. However, the total patch areas for broad leaved forest at the north of 51°N area had increased about 500%. The north frontier of broad leaved forest had moved towards northwest about 290 km. The fractal dimensions of Picea and Abies forest and mixed coniferous and broad leaved forest in 1986 were less than theirs in 1896, respectively. However, the fractal dimension of Pinus synvestris forest, Pinus koraiensis and broad leaved forest were more than theirs in 1896, respectively. Picea and Abies forest, Pinus synvestris forest, Pinus koraiensis and broad leaved forest became more fragmented. The transition percentages of Pinus sylvestris forest, Picea and Abies forest, Pinus koraiensis forest to themselves were less than the percentages to the mixed coniferous and broad leaved forest, respectively.展开更多
Shanghua No.6, a new peanut variety with high shelling percentage and bigfruit, was bred through sexual hybridization（female parent Pukehua No.2 × male parent Yuanza 9102） by Shangqiu Academy of Agriculture and...Shanghua No.6, a new peanut variety with high shelling percentage and bigfruit, was bred through sexual hybridization（female parent Pukehua No.2 × male parent Yuanza 9102） by Shangqiu Academy of Agriculture and Forestry Sciences. In the big peanut regional tests in north China in 2011-2012, Shanghua No.6 had the average yield of pod and seed respectively of 4 695.30 kg/hm^2 and 3 514.73 kg/hm^2;in the production test in 2013, its average yield of pod and seed were 4 531.0 5kg/hm^2 and 3 312.15 kg/hm^2. Its crude fat content was 50.46-53.46%, oleic acid content was 50.9-51.7%, and oil oleic acid/linoleic acid value was 1.69-1.76. The variety was high-resistant to brown spot and focal spot, susceptible to black spot,resistant to net blotch and stem rot. Its 100-pod weight was 256.2 g, 100-seed weight 111.2 g, and shelling percentage was 74.75%. The variety was certificated by National Crop Variety Approval Committee in 2014（identification number：2014010）, which was suitable for planting in Shandong, Henan, Hebei, Liaoning,Beijing, north of Huaihe River in Jiangsu and Anhui provinces.展开更多
In order to explore clinical relationship between Lipoprotein(a) and elderly diabetes, the level of plasma Lp(a) in 78 elderly patients with diabetes mellitus and 60 healthy controls was assayed. The results showed ...In order to explore clinical relationship between Lipoprotein(a) and elderly diabetes, the level of plasma Lp(a) in 78 elderly patients with diabetes mellitus and 60 healthy controls was assayed. The results showed that there was significant difference in the percentage of high Lp(a) level between diabetis and healthy subjects (P<0.01); that the percentages of high Lp(a) level with fasting Lp(a)200 mg/L, 300 mg/L in complication group were all significantly higher than those in noncomplication group (P<0.02); that there was significant difference in the percentage of high Lp(a) level with fasting and postprandial 2 hours Lp(a)200 mg/L in 30 patients without complication, the former was also significantly higher as compared with controls. These suggested that fasting blood sample was better for measurement of plasma Lp(a) level, and that fasting plasma Lp(a)200 mg/L might be useful for diabetes epidemiological investigation; that there was high plasma Lp(a) level in diabetics, especially in diabet展开更多
目的为解决疲劳驾驶检测中人眼状态识别的难点,提出一种基于眼白分割的疲劳检测方法。方法首先对获取图像进行人脸检测,利用眼白在Cb-Cr上良好的聚类性,基于YCb Cr颜色空间建立高斯眼白分割模型;然后在人脸区域图像内做眼白分割,计算眼...目的为解决疲劳驾驶检测中人眼状态识别的难点,提出一种基于眼白分割的疲劳检测方法。方法首先对获取图像进行人脸检测,利用眼白在Cb-Cr上良好的聚类性,基于YCb Cr颜色空间建立高斯眼白分割模型;然后在人脸区域图像内做眼白分割,计算眼白面积;最后将眼白面积作为人眼开度指标,结合PERCLOS(percentage of eyelid closure over the pupil over time)判定人的疲劳状态。结果选取10个短视频进行采帧分析,实验结果表明,高斯眼白分割模型能有效分离眼白,并识别人眼开合状态,准确率可达96.77%。结论在良好光线条件下,本文方法能取得不错的分割效果;本文所提出的以眼白面积作为判定人眼开度的指标,能准确地判定人的疲劳状态。实验结果证明了该方法的有效性,值得今后做更深入的研究。展开更多
Because of the distinction of soil property and humus content, soil water content is not ideal to indicate whether it is suitable to the growth of plant. Mainly based on the PF-a numerical value denoting the water reg...Because of the distinction of soil property and humus content, soil water content is not ideal to indicate whether it is suitable to the growth of plant. Mainly based on the PF-a numerical value denoting the water regime of soil and connected with the growth of plant, the study combined the moisture percentage of soil with PF to research in quantity the interrelation between the moisture percentage and PF in different succession phases of subalpine dark coniferous forest in Gongga Mountain. The results showed that: (1) In the same PF value, the moisture percentage in humus horizon increased gradually with the devel-opment of the succession of the dark coniferous forest; The moisture percentage of over-mature forest was the highest and>mature forest>half-mature forest>young growth forest; (2) With the increase of soil depth, the soil bulk density increased and the moisture percentage decreased, but the difference in the percentage of moisture was not notable in different succession phases. (3) In different succession series, the vegetation affected the soil water characteristics by increasing the soil organic matter, improving the soil construction, receding the soil bulk density and enhancing the soil porosity; (4) The humus horizon of the dark coniferous forest soil has the highest water holding capability in this region.展开更多
Lateral transportation of soil heavy metals in rainfall events could significantly increase the scope of pollution. Therefore, it is necessary to develop a model with high accuracy to simulate the migration quantity o...Lateral transportation of soil heavy metals in rainfall events could significantly increase the scope of pollution. Therefore, it is necessary to develop a model with high accuracy to simulate the migration quantity of heavy metals. A model for heavy metal migration simulation was developed based on the SWAT(Soil and Water Assessment Tool) model. This model took into consideration the influence of soil p H value, soil particle size, runoff volume, sediment amount,concentration of water-soluble heavy metals dissolved in runoff and insoluble absorbed to the soil particles. This model was reasonable in Huanjiang watershed, Guangxi Zhuang Autonomous Region, south China, covering an area of 273 km^2. The optimal drainage area threshold was determined by analyzing the effects of watershed subdivision on the simulation results to ensure the simulation accuracy. The main conclusions of this paper were:(1) watershed subdivision could affect simulation migration quantity of heavy metals;(2) the quantity of heavy metals transported by sediment accounted for 97%–99% of the total migration quantity in the study watershed. Therefore, sediment played the most important role in heavy metal migration;(3) the optimal drainage area threshold percentage to ensure high simulation accuracy was determined to be 2.01% of the total watershed;(4) with the optimal threshold percentage, this model could simulate the migration quantity of As, Pb and Cd accurately at the total watershed and subwatershed level. The results of this paper were useful for identifying the key regions with heavy metal migration.展开更多
基金supported by the Special Project of National Science and Technology Basic Resources Survey(Grant No.2017FY101100)。
文摘Objective The rising prevalence of childhood obesity is closely associated with suboptimal dietary patterns.To address this public health concern,we conducted a comprehensive study to examine the association between coarse cereals consumption and body fat percentage(BFP)in Chinese children and adolescents.Methods The study included 48,305 children aged 6–17 years from 28 districts/counties in 14 provinces across seven regions of China(24,152 girls and 24,153 boys).BFP was examined using bioelectrical impedance analysis in the early morning.Coarse cereals consumption was assessed using a Food Frequency Questionnaire and categorized into three groups:0 g/1,000 kcal per day,0–10 g/1,000kcal per day,and>10 g/1,000 kcal per day(daily consumption of coarse cereals×1,000/total energy consumption).Quantile regression model was used to analyze the association between coarse cereals and BFP,adjusting for potential confounders such as age,pubertal development stage,urban/rural and regional factors,total daily dietary energy consumption,sedentary time,moderate-to-high physical activity,household income,parental education,and consumption of other foods.Results Boys aged 6–10,11–14,and 15–17 years had median daily coarse cereals consumptions of6.6 g,7.1 g,and 5.7 g,with BFP of 19.6%,19.5%,and 17.5%(all P<0.05).Girls in the same age groups showed consumption of 7.1 g,8.4 g,and 6.7 g,with BFP of 20.3%,26.4%,and 31.0%(all P<0.05).The quantile regression results for boys showed that daily consumption of coarse cereals was significantly correlated with their BFP in the 0.15,0.25,and 0.50 quartiles,with regression coefficients of-0.257,-0.221,and-0.330,respectively,after adjusting for potential confounders(P<0.05).For girls,there was a significant correlation with PBF at the 0.05,0.15,0.25,0.50,0.75,and 0.85 quartiles,with regression coefficients of-0.258,-0.366,-0.372,-0.431,-0.472,and-0.503(P<0.05 for all).Conclusions Coarse cereals consumption among Chinese children and adolescents remains relatively low.Higher consumption was inversely associated with BFP in children aged 6–17 years.Future interventional studies should assess how increased coarse cereals consumption prevents childhood obesity.
基金Supported by Russian Science Foundation,No.23-25-00183.
文摘BACKGROUND We previously demonstrated that the antibody against programmed cell death protein 1 ligand 1(PDCD1 LG1)is a promising new marker of programmed death-ligand 1(PD-L1)expression that correlates with both breast cancer(BC)clinicopathological characteristics and tumor sensitivity to chemotherapy.However,the concordance of PDCD1 LG1 expression scoring with immunohistochemical(IHC)tests approved for clinical use and with the polymerase chain reaction(PCR)method has not been previously studied.AIM To evaluate the concordance of methods for assessing PD-L1 expression,IHC tests with anti-PD-L1(PDCD1 LG1)and anti-PD-L1(SP142)antibodies and PCR.METHODS This prospective single-center observational cohort study included 148 patients with BC.PD-L1 expression in immune cells was assessed by the IHC method with anti-PD-L1(PDCD1 LG1)and anti-PD-L1(SP142)antibodies and by PCR.The concordance of PD-L1 scores between tests was assessed with positive percentage agreement(PPA)and negative percentage agreement(NPA).The strength of the agreement between the methods was calculated via the Cohen kappa index.P<0.05 was considered statistically significant.RESULTS Regardless of the method used to assess marker expression,PD-L1 expression was significantly more often detected in patients with negative estrogen receptor status,human epidermal growth factor receptor-2-positive(HER2+)status,luminal B HER+BC,nonluminal HER+BC and triple-negative BC.PPA and NPA were 38.3%and 70.4%,respectively,for PD-L1(PDCD1 LG1)and PD-L1(SP142);26.3%and 63.3%,respectively,for PD-L1(PDCD1 LG1)and PD-L1(PCR);and 36.5%and 74.4%,respectively,for PD-L1(SP142)and PD-L1(PCR).Cohen's kappa index for PD-L1(PDCD1 LG1)and PD-L1(SP142)was 0.385(95%CI:0.304–0.466),that for PD-L1(PDCD1 LG1)and PD-L1(PCR)was 0.207(95%CI:0.127–0.287),and that for PD-L1(SP142)and PD-L1(PCR)was 0.389(95%CI:0.309–0.469).CONCLUSION Thus,all three markers of PD-L1 expression are associated with the characteristics of aggressive BC,demonstrating moderate concordance between the tests.
基金State Key Research Development Program of China,Grant/Award Number:2021YFC3001301。
文摘As the first gold mine discovered at the sea in China and the only coastal gold mine currently mined there,Sanshandao Gold Mine faces unique challenges.The mine's safety is under continual threat from its faulted structure coupled with the overlying water.As the mining proceeds deeper,the risk of water inrush increases.The mine's maximum water yield reaches 15000 m3/day,which is attributable to water channels present in fault zones.Predominantly composed of soil–rock mixtures(SRM),these fault zones'seepage characteristics significantly impact water inrush risk.Consequently,investigating the seepage characteristics of SRM is of paramount importance.However,the existing literature mostly concentrates on a single stress state.Therefore,this study examined the characteristics of the permeability coefficient under three distinct stress states:osmotic,osmotic–uniaxial,and osmotic–triaxial pressure.The SRM samples utilized in this study were extracted from in situ fault zones and then reshaped in the laboratory.In addition,the micromechanical properties of the SRM samples were analyzed using computed tomography scanning.The findings reveal that the permeability coefficient is the highest under osmotic pressure and lowest under osmotic–triaxial pressure.The sensitivity coefficient shows a higher value when the rock block percentage ranges between 30%and 40%,but it falls below 1.0 when this percentage exceeds 50%under no confining pressure.Notably,rock block percentages of 40%and 60%represent the two peak points of the sensitivity coefficient under osmotic–triaxial pressure.However,SRM samples with a 40%rock block percentage consistently show the lowest permeability coefficient under all stress states.This study establishes that a power function can model the relationship between the permeability coefficient and osmotic pressure,while its relationship with axial pressure can be described using an exponential function.These insights are invaluable for developing water inrush prevention and control strategies in mining environments.
基金funded by the National Natural Science Foundation of China(grant numbers:82202877 and 8237110369)the Natural Science Foundation of Guangdong Province of China(grant number:2024A1515010599)Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support(grant number:XMLX202134).
文摘Background Genitourinary cancers constitute a significant portion of the global cancer burden and have emerged as a prominent cause of cancer-related mortality.However,there remains a paucity of up-to-date statistical analyses that meticulously examine the global and national shifts in the epidemiology of genitourinary cancers.Our study aimed to provide a comprehensive understanding of the global distribution and progression of genitourinary cancers through analyses of the recently updated 2021 Global Burden of Disease(GBD)database.Methods This study presented the incidence,mortality,disability-adjusted life years(DALYs),and their respective age-standardized rates for four genitourinary cancers(bladder,kidney,prostate,and testicular cancers)by sex,age,and location from 1990 to 2021.Estimates for these data were presented with their 95%uncertainty intervals(UIs).Estimated annual percentage changes(EAPCs)and Bayesian Age-Period-Cohort(BAPC)models were utilized to further quantify the temporal dynamics of age-standardized rates(ASRs)in genitourinary cancers.Countries and territories were categorized according to socio-demographic index(SDI)quintiles.Results Globally,with the exception of a sustained decline in age-standardized incidence rates(ASIRs)for bladder cancer(EAPC=−0.36%),the ASIRs for kidney,prostate,and testicular cancers demonstrated an upward trend from 1990 to 2021(EAPC=0.53%,0.20%,and 1.43%,respectively).In terms of geographical regions,High-income North America had the highest ASIRs for both bladder(13.98 per 100,000 persons[95%UI,12.96 to 14.61])and prostate(47.02 per 100,000 persons[95%UI,44.47 to 49.04])cancers.Southern Latin America recorded the highest ASIRs for kidney(13.44 per 100,000 persons[95%UI,12.27 to 14.73])and testicular(4.98 per 100,000 persons[95%UI,4.33 to 5.72])cancers.Additionally,Central Europe(1.25%[95%CI,1.12%to 1.38%]),East Asia(2.40%[95%CI,2.21%to 2.59%]),Eastern Europe(3.74%[95%CI,3.55%to 3.92%]),and the Caribbean(5.52%[95%CI,4.32%to 6.74%])exhibited the highest EAPCs for bladder,kidney,prostate,and testicular cancers,respectively.Unlike the ASIRs,age-standardized mortality rates(ASMRs)and age-standardized DALYs rates(ASDRs)showed a downward trend over time in all types of genitourinary cancers.The disease burdens of bladder,kidney,and prostate cancers were primarily distributed among older men,while testicular cancer mainly occurred in young men.Smoking remained the primary risk factor for bladder cancer.Meanwhile,high fasting plasma glucose and high body-mass index exerted increasingly significant impacts on bladder and kidney cancers,respectively,during the study period.Projections to 2050 suggest that the global burdens of genitourinary cancers are expected to decline to varying degrees.However,regional disparities in genitourinary cancer burdens are projected to persist.Conclusions Although the results demonstrate a marginal decline in ASRs caused by genitourinary cancers,they still impose a considerable global burden and result in numerous deaths.Our study obtained and analyzed the latest epidemiological data of genitourinary cancers from the GBD 2021,offering valuable information for national healthcare professionals and policymakers to optimize resource allocation,manage costs more efficiently,and develop practical healthcare policies.
文摘Objective:To explore the relationship between obesity,body fat percentage(BF%),blood lipid levels,and prediabetes.Methods:A total of 91 patients with prediabetes who visited the hospital from February 2024 to February 2025 were included in the observation group,and 90 healthy individuals with normal blood glucose levels during the same period were included in the control group.Physical examination,body fat percentage,and biochemical indicators were checked,and the relationship between these indicators and prediabetes was analyzed.Results:The observation group had higher body weight(BW),waist circumference(WC),body mass index(BMI),fat mass(FM),total cholesterol(TC),low-density lipoprotein(LDL),triglycerides(TG),fasting blood glucose(FBG),and 2-hour postprandial blood glucose(2hPG)compared to the control group,with P<0.05.The detection rates of obesity,abnormal WC,abnormal body fat percentage(BF%),abnormal TC,abnormal TG,and abnormal LDL were higher in the observation group than in the control group,with P<0.05.Multivariate logistic regression analysis showed that WC,TC,TG,BF%,and BMI were independent high-risk factors for prediabetes,with P<0.05.Conclusion:Obesity and dyslipidemia are high-risk factors for prediabetes.Scientific dietary planning and weight management should be implemented to reduce the incidence of diabetes.
文摘To the Editor,We have read the article by Gener-Ricos et al.titled"NPM1-mutated myeloid neoplasms are a unique entity not defined by bone marrow blast percentage",published in Cancer[1].This retrospective,cross-sectional pilot study provides valuable insights into the clinicopathological features and treatment outcomes of patients with NPM1-mutated myeloid neoplasms(MNs)with less than 20%bone marrow blasts[1].
基金the Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT) Sari Agricultural Sciences and Natural Resources University (SANRU) for the use of the services and financial supports of this research
文摘The oilseed crop Camelina sativa exhibits salinity tolerance,but the effects on early growth stages across a range of different salts and in combination with salicylic acid(SA)have not been thoroughly evaluated.In this study,seeds were germinated in varying concentrations of six salts(NaCl,CaCl_(2),ZnCl_(2),KCl,MgSO_(4),and Na2SO_(4))with or without 0.5 mM SA.Using the halotime model,we estimated salt thresholds for germination and parameters of seedling growth.Germination and seedling growth parameters of camelina significantly decreased with increasing salt concentration across all salt types.Salts containing Zn and SO_(4) were most detrimental to germination and seedling growth.Except for KCl,0.5 mM SA generally reduced the salinity tolerance threshold(Saltb(50))of camelina.Specifically,Saltb(50)was 21.5%higher for KCl and 16.1%,25.0%,54.9%,21.0%,and 5.6%lower for CaCl_(2),NaCl,MgSO_(4),Na2SO_(4),and ZnCl_(2),respectively,when 0.5 mM SA was compared to 0 mM SA.Furthermore,camelina seedling growth was consistently more sensitive than germination across all salt types.SA did not significantly enhance germination or seedling growth and was harmful when combined with certain salts or at the germination stage.It can be concluded that both the type of salt and the concentration of SA are as critical as the salt concentration in saline irrigation water.
文摘Objective:This study aims to estimate the thyroid cancer(TC)burden and trends from 1990 and 2021 among working-age population(WAP),at the global,regional,and national levels.Methods:Based on the Global Burden of Disease 2021 study,this cross-sectional study included data on TC incidence and mortality for WAP aged 15-64 years across 204 countries and territories from 1990 to 2021.The age-standardized incidence rate(ASIR)and age-standardized mortality rate(ASMR)of TC were used to estimate the disease burden.Temporal trends of ASIR and ASMR were estimated by average annual percentage changes(AAPCs)based on age-period-cohort models.Relative inequality of TC burden across 204 countries was estimated by the slope index of concentration index.Results:Globally,ASIR of TC increased from 2.27 per 100,000 population to 3.41 per 100,000 population from1990 to 2021,with AAPC of 1.59%[95%confidence interval(95%CI):1.54,1.64];in contrast,ASMRs were stable at 0.31 per 100,000 population.Females had a higher disease burden than males,and adults aged 45-64 years accounted for more than 55%of the TC cases.Across regions and countries,North Africa and Comoros experienced the highest increase in ASIR,with AAPCs of 2.97%and 7.73%,respectively.All socio-demographic index(SDI)regions experienced a significant increase in ASIR,and regions with high and high-middle SDI experienced a significant decrease in ASMR.Global ASIR burden and ASMR burden were revealed to be concentrated mainly in higher-SDI and lower-SDI countries,respectively,with the concentration index in both sexes of 0.16(95%CI:0.13,0.19)and-0.14(95%CI:-0.18,-0.10)in 2021.Conclusions:Over the past three decades,the incidence burden of TC among the global WAP remarkably increased.International and regional policies for TC controls are supposed to be updated timely,to handle the current increasing burden and geographic disparities among WAP.
文摘公开(公告)号:US12242011B2 Method for estimating water saturation in gas reservoirs using acoustic log P-wave and S-wave velocites利用声波测井纵波和横波速度估算气藏含水饱和度的方法摘要:The present application relates to new systems and methods of quantifying hydrocarbon saturation using measured acoustic logs.The methods and systems herein can accurately quantify the water saturation and hydrocarbon percentage in a low resistivity low contrast shaly sand reservoir where previous methods would indicate the reservoir was wet.In an embodiment,the disclosed system utilizes acoustic logging equipment or tools and techniques to transmit and/or record acoustic signals.Acoustic logging equipment operates by generating acoustic signals and detecting the acoustic signals after the acoustic signals pass through one or more geologic formations.
基金Supported by National Natural Science Foundation of China(NSFC)of China,No.82360358Internal Medicine Research Project of Gansu Provincial People's Hospital,No.22GSSYD-77Natural Science Foundation of Gansu Province,No.22JR5RA659.
文摘BACKGROUND Chronic obstructive pulmonary disease(COPD)is a progressive respiratory condition often associated with a high incidence of osteoporosis.Studies indicate that patients with COPD present with a significant decrease in bone mineral density(BMD),potentially related to inflammation and corticosteroid use.AIM To investigate the relationship between BMD and lung function,mainly the forced expiratory volume in the forced expiratory volume in 1 second(FEV1)/forced vital capacity percentage(FVC%),in patients with COPD using quantitative computed tomography(QCT).METHODS This prospective cross-sectional study included 85 patients with COPD treated at Gansu Provincial People's Hospital.Exposure variables included lung function parameter(FEV1/FVC%),age,sex,body mass index,smoking status,tea-drinking habits,and physical activity.BMD was measured using QCT.Linear regression and generalized additive models were employed to analyze the relationship between exposure variables and BMD.RESULTS Linear regression analysis revealed a significant positive relationship between BMD and FEV1/FVC%(β=0.1,95%confidence interval[CI]:0.1-0.1;P<0.0001).Non-linear analysis identified a unique BMD breakpoint of 128.08 mg/cm³.Before the breakpoint,BMD was significantly positively correlated with FEV1/FVC%(β=0.245;P=0.0019);while after the breakpoint,the relationship was negative and showed no statistical significance(β=-0.136;P=0.0753).This finding underscores the critical role of BMD in COPD management and highlights the importance of individualized clinical interventions in improvement of lung function and overall health status in patients.CONCLUSION There is a complex non-linear relationship between BMD and lung function in patients with COPD,highlighting the importance of monitoring change in bone density during the management of COPD.
文摘A study was conducted to determine the physiological characteristics changes of Aesculus chinensis seeds during natural dehydration in 2003. The results showed that A. chinensis seeds were recalcitrant with being highly desiccation-sensitive. The seed moisture content of fresh fruits was higher than 60%. When the seeds were naturally dried for 30 days, their moisture content declined to 30.2% and their viability was completely lost. The seed germination percentage had a small increase at the beginning of desiccation and then decreased rapidly. The relative electrical conductivity of the A. chinensis seeds increased along with a decrease in seed moisture content. However, there was an abnormal increase in relative electrical conductivity when the seed moisture content was between 53.7% and 50.9%. Superoxide dismutase （SOD） activity decreased rapidly in the period of desiccation except for an abnormality when the seed moisture content was between 53.7% and 50.9%. Malondialdehyde （MDA） content increased slowly at the early stage of desiccation and then rose rapidly after the moisture content was below 50.9%. The soluble sugar content in seeds slowly increased with the increasing period of desiccation. The seed germination percentage was at the high level when seed moisture content was in range of 47%- 60%, which suggests that this was the optimum moisture content for maintaining A. chinensis seed viability.
基金Supported by the Special Program for Wheat Grain Quality Stability from Ministry of Agriculture of China(070101)the National Key Technologies R&D Program of China during the 10th Five-Year Plan Period(2004BA520A12-4)~~
文摘[Objective] This study aimed to explore the effects of nitrogen fertigation rate on the protein components in grains and processing quality of different wheat varieties. [Method] Under the condition of higher soil fertility, different amounts of N-fertilizer were applied in the plots, and then the contents of total protein and its components, percentage of the component content to total protein content as well as the processing quality of grains of two strong-gluten wheat varieties （Linyou145 and Zhengmai9023） and two weak-gluten wheat varieties （Ningmai9 and Baofeng949） were determined. [Result] The contents of total protein and globulin, gliadin and glutenin were improved significantly with the increase of the N-fertilizer amount; but the content of albumin did not show remarkable increase; in addition, the percentage of each protein component was relative stable and did not increase significantly. Increase in the amount of N-fertilizer improved the sedimentation value, wet gluten content, loaf volume and loaf score, decreased the volume weight of grain. [Conclusion] This study provideed theoretical support for high-quality wheat production.
文摘To understand the dynamics of added nitrogen (N) in alpine meadow and the role of alpine plants and soil microorganisms in the retention of deposited N, the fate of 15 N labeled nitrate and ammonium salts was determined in an alpine meadow for two months. Two weeks after 15 N application, total recovery of 15 N from NO - 3_ 15 N was 73.5% while it was 78% from NH + 4_ 15 N. More 15 N was recovered in plants than in soil organic matter or in microbial biomass, irrespective of forms of N added. After one month, 70.6% of added NO - 3_ 15 N and 57.4% of NH + 4_ 15 N were recovered in soils and plants. 15 N recovered in soil organic matter decreased greatly while that recovered in plants varied little, irrespective of the form N. Compared with the results of two weeks after 15 N application, more NO - 3_ 15 N than NH + 4_ 15 N was recovered in microbial biomass. Total recovery was 58.4% (six weeks) and 67% (eight weeks) from NO - 3_ 15 N, and 43.1% and 49% from NH + 4_ 15 N, respectively. Both plants and soil microorganism recovered more NO - 3_ 15 N than NH + 4_ 15 N. But plants recovered more 15 N than soil microorganisms. During the whole experiment plants retained more NO - 3_N and 15 N than soil microorganisms while 15 N recovered in inorganic N pool did not exceed 1% due to lower amount of inorganic N. This indicates that plants play more important roles in the retention of deposited N although microbial biomass can be an important sink for deposited N in early days after N application.
基金Supported by Functional Gene Screen and Tissues' Differential Expression Analysis of Yak Muscle Development in Growth StagesNational Beef Cattle Industrial Technology System(CARS-38)+1 种基金Sichuan Province Yak Germplasm Resource Information Sharing Platform Construction Program(14010121)Ganzi Community Key Grass-Livestock Transformation Technology in Hongyuan County(201203008)~~
文摘For studying the germplasm charactedsUcs and carcass traits of Changtai yak, 8 adult yaks （5 male, 3 female） were selected and tested. The results showed that the pre-slaughter weight of the adult male and female Changtai yak was 364.32 and 266.83 kg, respectively, which presented extremely significant difference （P〈0.01）. The carcass weight, net bone weight net meat weight, and the ratio of bone to meat also showed extremely significant difference （P〈O.01）, which were 186.60 and 125.67 kg, 39.74 and 25.00 kg, 147.84 and 100.83 kg, 1：3.73 and 1： 4.03, respectively. The dressing percentage had significant difference which was 51.15% and 49.34%, respectively （P〈0.05）. The neat meat percentage and carcass meat production rate showed no significant difference which were 40.54% and 37.66%, 79.29% and 80.24%, respectively （P〉0.05）. It indicated that Changtai yak has better growth performance and meat performance potential, and worth of further studying and breeding.
文摘Five forest landscapes in the maps of forest distribution in Heilongjiang Province in 1896 and 1986 were digitized and analyzed through GIS software. The results show that during the 90 years the total patch areas for Picea and Abies forest, Pinus sylvestris var. mongolica Litvin forest and Pinus koraiensis Sieb. et Zucc. forest had decreased about 87%, 40% and 84%, respectively. However, the total patch areas for broad leaved forest at the north of 51°N area had increased about 500%. The north frontier of broad leaved forest had moved towards northwest about 290 km. The fractal dimensions of Picea and Abies forest and mixed coniferous and broad leaved forest in 1986 were less than theirs in 1896, respectively. However, the fractal dimension of Pinus synvestris forest, Pinus koraiensis and broad leaved forest were more than theirs in 1896, respectively. Picea and Abies forest, Pinus synvestris forest, Pinus koraiensis and broad leaved forest became more fragmented. The transition percentages of Pinus sylvestris forest, Picea and Abies forest, Pinus koraiensis forest to themselves were less than the percentages to the mixed coniferous and broad leaved forest, respectively.
基金Supported by the Special Fund for the Agriculture Research System of Peanut of Henan Province(S2012-05-G01)the Key Scientific and Technological Project of Henan Province(141100110600)~~
文摘Shanghua No.6, a new peanut variety with high shelling percentage and bigfruit, was bred through sexual hybridization（female parent Pukehua No.2 × male parent Yuanza 9102） by Shangqiu Academy of Agriculture and Forestry Sciences. In the big peanut regional tests in north China in 2011-2012, Shanghua No.6 had the average yield of pod and seed respectively of 4 695.30 kg/hm^2 and 3 514.73 kg/hm^2;in the production test in 2013, its average yield of pod and seed were 4 531.0 5kg/hm^2 and 3 312.15 kg/hm^2. Its crude fat content was 50.46-53.46%, oleic acid content was 50.9-51.7%, and oil oleic acid/linoleic acid value was 1.69-1.76. The variety was high-resistant to brown spot and focal spot, susceptible to black spot,resistant to net blotch and stem rot. Its 100-pod weight was 256.2 g, 100-seed weight 111.2 g, and shelling percentage was 74.75%. The variety was certificated by National Crop Variety Approval Committee in 2014（identification number：2014010）, which was suitable for planting in Shandong, Henan, Hebei, Liaoning,Beijing, north of Huaihe River in Jiangsu and Anhui provinces.
文摘In order to explore clinical relationship between Lipoprotein(a) and elderly diabetes, the level of plasma Lp(a) in 78 elderly patients with diabetes mellitus and 60 healthy controls was assayed. The results showed that there was significant difference in the percentage of high Lp(a) level between diabetis and healthy subjects (P<0.01); that the percentages of high Lp(a) level with fasting Lp(a)200 mg/L, 300 mg/L in complication group were all significantly higher than those in noncomplication group (P<0.02); that there was significant difference in the percentage of high Lp(a) level with fasting and postprandial 2 hours Lp(a)200 mg/L in 30 patients without complication, the former was also significantly higher as compared with controls. These suggested that fasting blood sample was better for measurement of plasma Lp(a) level, and that fasting plasma Lp(a)200 mg/L might be useful for diabetes epidemiological investigation; that there was high plasma Lp(a) level in diabetics, especially in diabet
文摘目的为解决疲劳驾驶检测中人眼状态识别的难点,提出一种基于眼白分割的疲劳检测方法。方法首先对获取图像进行人脸检测,利用眼白在Cb-Cr上良好的聚类性,基于YCb Cr颜色空间建立高斯眼白分割模型;然后在人脸区域图像内做眼白分割,计算眼白面积;最后将眼白面积作为人眼开度指标,结合PERCLOS(percentage of eyelid closure over the pupil over time)判定人的疲劳状态。结果选取10个短视频进行采帧分析,实验结果表明,高斯眼白分割模型能有效分离眼白,并识别人眼开合状态,准确率可达96.77%。结论在良好光线条件下,本文方法能取得不错的分割效果;本文所提出的以眼白面积作为判定人眼开度的指标,能准确地判定人的疲劳状态。实验结果证明了该方法的有效性,值得今后做更深入的研究。
基金The Development Plan of the State Key Fundamental Research of China (973), contract No. 2000046807 and by Knowledge Innovation Project of the Chinese Academy of Sciences (KZCX2-405)
文摘Because of the distinction of soil property and humus content, soil water content is not ideal to indicate whether it is suitable to the growth of plant. Mainly based on the PF-a numerical value denoting the water regime of soil and connected with the growth of plant, the study combined the moisture percentage of soil with PF to research in quantity the interrelation between the moisture percentage and PF in different succession phases of subalpine dark coniferous forest in Gongga Mountain. The results showed that: (1) In the same PF value, the moisture percentage in humus horizon increased gradually with the devel-opment of the succession of the dark coniferous forest; The moisture percentage of over-mature forest was the highest and>mature forest>half-mature forest>young growth forest; (2) With the increase of soil depth, the soil bulk density increased and the moisture percentage decreased, but the difference in the percentage of moisture was not notable in different succession phases. (3) In different succession series, the vegetation affected the soil water characteristics by increasing the soil organic matter, improving the soil construction, receding the soil bulk density and enhancing the soil porosity; (4) The humus horizon of the dark coniferous forest soil has the highest water holding capability in this region.
基金supported by the Hi-Tech Research and Development Program(863)of China(No.2014AA06A513)the Beijing Postdoctoral Research Foundation+2 种基金the Project of Heavy Metal Risk Warning and Phytoremediation in Mining Concentrated Area(No.GJHZ201308)the Special Fund for Environment Protection Research in the Public Interest(No.201409044)the Study on Heavy Metal Accumulation Risk and Early Warning in Typical Ore Concentration Area(No.201111020-4)
文摘Lateral transportation of soil heavy metals in rainfall events could significantly increase the scope of pollution. Therefore, it is necessary to develop a model with high accuracy to simulate the migration quantity of heavy metals. A model for heavy metal migration simulation was developed based on the SWAT(Soil and Water Assessment Tool) model. This model took into consideration the influence of soil p H value, soil particle size, runoff volume, sediment amount,concentration of water-soluble heavy metals dissolved in runoff and insoluble absorbed to the soil particles. This model was reasonable in Huanjiang watershed, Guangxi Zhuang Autonomous Region, south China, covering an area of 273 km^2. The optimal drainage area threshold was determined by analyzing the effects of watershed subdivision on the simulation results to ensure the simulation accuracy. The main conclusions of this paper were:(1) watershed subdivision could affect simulation migration quantity of heavy metals;(2) the quantity of heavy metals transported by sediment accounted for 97%–99% of the total migration quantity in the study watershed. Therefore, sediment played the most important role in heavy metal migration;(3) the optimal drainage area threshold percentage to ensure high simulation accuracy was determined to be 2.01% of the total watershed;(4) with the optimal threshold percentage, this model could simulate the migration quantity of As, Pb and Cd accurately at the total watershed and subwatershed level. The results of this paper were useful for identifying the key regions with heavy metal migration.
