期刊文献+
共找到518篇文章
< 1 2 26 >
每页显示 20 50 100
Comprehensive view of suicide:A neuro-immune-endocrine approach
1
作者 María D Ponce-Regalado Enrique Becerril-Villanueva +11 位作者 JoséLuis Maldonado-García Martha C Moreno-Lafont Gabriela Martínez-Ramírez Salomón Jacinto-Gutiérrez Rodrigo Arreola Karla Sánchez-Huerta Arturo Contis-Montes de Oca Karla María López-Martínez Elizabeth Bautista-Rodríguez JoséMiguel Chin-Chan Lenin Pavón Gilberto Pérez-Sánchez 《World Journal of Psychiatry》 2025年第2期1-22,共22页
Suicide is defined as the act of a person attempting to take their own life by causing death.Suicide is a complex phenomenon that is influenced by a multitude of factors,including psychosocial,cultural,and religious a... Suicide is defined as the act of a person attempting to take their own life by causing death.Suicide is a complex phenomenon that is influenced by a multitude of factors,including psychosocial,cultural,and religious aspects,as well as genetic,biochemical,and environmental factors.From a biochemical perspective,it is crucial to consider the communication between the endocrine,immune,and nervous systems when studying the etiology of suicide.Several pathologies involve the bidirectional communication between the peripheral activity and the central nervous system by the action of molecules such as cytokines,hormones,and neurotransmitters.These humoral signals,when present in optimal quantities,are responsible for maintaining physiological homeostasis,including mood states.Stress elevates the cortisol and proinflammatory cytokines levels and alter neurotransmitters balance,thereby increasing the risk of developing a psychiatric disorder and subsequently the risk of suicidal behavior.This review provides an integrative perspective about the neurochemical,immunological,and endocrinological disturbances associated with suicidal behavior,with a particular focus on those alterations that may serve as potential risk markers and/or indicators of the state preceding such a tragic act. 展开更多
关键词 SUICIDE Neuroimmune endocrine NEUROTRANSMITTERS Hormones Cytokines Hypothalamic-pituitary adrenal axis Early life adversity Inflammation Genetic predisposition Psychiatric disorders
暂未订购
Cytokine release syndrome induced by anti-programmed death-1 treatment in a psoriasis patient:A dark side of immune checkpoint inhibitors
2
作者 JoséLuis Maldonado-García Ana Fragozo Lenin Pavón 《World Journal of Clinical Cases》 SCIE 2024年第35期6782-6790,共9页
In recent years,cancer immunotherapy has introduced novel treatments,such as monoclonal antibodies,which have facilitated targeted therapies against tumor cells.Programmed death-1(PD-1)is an immune checkpoint expresse... In recent years,cancer immunotherapy has introduced novel treatments,such as monoclonal antibodies,which have facilitated targeted therapies against tumor cells.Programmed death-1(PD-1)is an immune checkpoint expressed in T cells that regulates the immune system’s activity to prevent over-activation and tissue damage caused by inflammation.However,PD-1 is also expressed in tumor cells and functions as an immune evasion mechanism,making it a therapeutic target to enhance the immune response and eliminate tumor cells.Consequently,immune checkpoint inhibitors(ICIs)have emerged as an option for certain tumor types.Nevertheless,blocking immune checkpoints can lead to immune-related adverse events(irAEs),such as psoriasis and cytokine release syndrome(CRS),as exemp-lified in the clinical case presented by Zhou et al involving a patient with adva-nced gastric cancer who received sintilimab,a monoclonal antibody targeting PD-1.Subsequently,the patient experienced exacerbation of psoriasis and CRS.The objective of this editorial article is to elucidate potential immunologic mechanisms that may contribute to the development of CRS and psoriasis in patients receiving ICIs.It is crucial to acknowledge that while ICIs offer superior safety and efficacy compared to conventional therapies,they can also manifest irAEs affecting the skin,gastrointestinal tract,or respiratory system.In severe cases,these irAEs can lead to life-threatening complications such as circulatory shock or multiorgan failure.Consequently,it is recommended that patients receiving ICIs undergo regular monitoring to identify and manage these adverse events effectively. 展开更多
关键词 Immune checkpoints inhibitors Programmed death-1 Cancer immunotherapy PSORIASIS Cytokine release syndrome Immune-related adverse events
暂未订购
Climate Change Vulnerability and Disaster Risk Assessment Using Remote Sensing Technology and Adaptation Strategies for Resiliency and Disaster Risk Management in Selected Coastal Municipalities of Zambales, Philippines 被引量:2
3
作者 Annie Melinda Paz-Alberto Eliza Camaso +4 位作者 Roann P. Alberto Daryl A. Juganas Kathrina M. Mapanao Carl Dionelle B. Ponce Christopher Genaro 《American Journal of Climate Change》 2021年第1期85-133,共49页
The Philippines is one of the most hazard prone and vulnerable countries in the world to climate change effects due to its geographical location. Climate change is already happening and affecting many places causing h... The Philippines is one of the most hazard prone and vulnerable countries in the world to climate change effects due to its geographical location. Climate change is already happening and affecting many places causing huge problems to coastal ecosystems. Vulnerability and disaster assessment and mapping in coastal areas are essential tasks and undertakings for coastal disaster risk management. The objectives of this study were to assess the climate change vulnerability and disaster risks in the four municipalities (Sta. Cruz, Candelaria, Masinloc and Palauig) of Zambales and to determine the climate change community-based adaptation (CBA) and ecosystem-based adaptation (EBA) strategies. Remote sensing, GIS, secondary data gathering and key informant interview were used to assess vulnerability and disaster risks and mapping in the four municipalities. Survey questionnaire, focus group discussion and key informant interview were utilized in gathering data for the determination of climate change adaptation strategies. Using remote sensing technology, it was revealed that coastline changes have occurred in the shorelines of the four coastal municipalities after a decade. Sea level rise happened in Sta. Cruz and Masinloc, Zambales while there was build-up of soil in the coastline of Candelaria and Palauig, Zambales. Twelve hazard maps, 12 vulnerability maps and 12 disaster risk maps were generated for the three major disasters (flood, landslide, storm surge) in the four coastal municipalities. Based on the flood vulnerability and disaster risk assessment, the municipality of Palauig was found to be the most prone to flooding while the municipality of Candelaria was found to be the most vulnerable to landslide compared to other municipalities. All coastal barangays in the four municipalities were susceptible to storm surge. The four coastal municipalities were conducting community-based adaptation (CBA) and ecosystem-based adaptation (EBA) approaches in order to protect their coastal resources from the damaging impacts of climate change and improve the resilience of their local communities. 展开更多
关键词 Climate Change Vulnerability Assessment Disaster Risk Remote Sensing Community-Based Adaptation Ecosystem-Based Adaptation
在线阅读 下载PDF
Climate Change Community-Based and Ecosystem-Based Adaptation Strategies in Selected Coastal Barangays in Masinloc, Zambales, Philippines 被引量:1
4
作者 Roann P. Alberto Annie Melinda Paz-Alberto +1 位作者 Carl Dionelle B. Ponce Kimberly Joy E. Mata 《American Journal of Climate Change》 2022年第4期342-362,共21页
Climate change continues to intensify existing disaster risks and vulnerabilities in the Philippines. Thus, implementation of climate change adaptation strategies is vital to counter the effects of climate change. It ... Climate change continues to intensify existing disaster risks and vulnerabilities in the Philippines. Thus, implementation of climate change adaptation strategies is vital to counter the effects of climate change. It is in this context that this study was undertaken to analyze the need or urgency to adopt community and ecosystem-based adaptation strategies among selected coastal barangays (villages) of Masinloc, Zambales, Philippines. Various methods of data collection were utilized such as secondary data collection, primary data collection through household survey, key informant interviews, and focus group. Results of the study indicate that in terms of community-based adaptation strategies, all of the seven barangays in Masinloc have moderate necessity. However, only Barangays Bani and Collat have high adaptation capacity in terms of infrastructure and disaster preparedness. The execution of several community-based adaptation strategies helps these barangays to respond immediately and appropriately to the moderate risk posed by floods and storm surges. On the other hand, in terms of ecosystem-based adaptation strategies, all of the seven barangays have moderate necessity which implies that they have moderate vulnerability and risk to flood and storm surge but have high adaptation capacity in terms of the conservation and protection of coastal resources (mangroves and sea grasses). The barangays implemented the necessary ecosystem-based adaptation mechanisms that they might need in the future. This only means that when they are faced with disaster, the local communities are prepared to respond appropriately and to cope up with the effects of extreme weather events which lead to floods and storm surge. Even though most of the ecosystem-based adaptation strategies are conducted by the seven barangays, there are several community-based adaptation strategies that are still lacking which will protect them from the effect of floods and storm surges. Hence, carrying out the missing adaptation strategies, both community-based and ecosystem-based, will help in improving the adaptive capacity of the affected barangays and will help them become more resilient to the amplified effects of climate change. 展开更多
关键词 Climate Change NECESSITY Community-Based Adaptation Strategies Ecosystem-Based Adaptation Strategies Disaster Risk Assessment
在线阅读 下载PDF
Voyage of Ben Cao, Part I: Discovery of Kam Wah Chung, the Overlooked Chinese Medicine Museum in the United States 被引量:1
5
作者 Zhong-Zhen Zhao Eric Brand 《Chinese Medicine and Culture》 2022年第1期65-71,共7页
1 Introduction Imagery of the Western United States typically evokes vast wheat fields,cowboys,and rolling mountain valleys.Few would associate the American West with Chinese medicine.This article describes a remote t... 1 Introduction Imagery of the Western United States typically evokes vast wheat fields,cowboys,and rolling mountain valleys.Few would associate the American West with Chinese medicine.This article describes a remote town called John Day,which is located in a mountainous terrain in Oregon,and presents the remarkable story of the Kam Wah Chung Museum(Fig.1). 展开更多
关键词 Chinese Medicine Museum Kam Wah Chung Medical history John Day
暂未订购
Towards Inclusive Development: Situating the Socio-Economic Wellbeing and Environmental Issues of an Indigenous Cultural Community in the Philippines
6
作者 Jerski Jarzen C. Duria Eugenia G. Baltazar +1 位作者 Johnah Jefferson S. Mercado Armando C. Lagasca 《Open Journal of Ecology》 2023年第6期367-386,共20页
The Municipality of Carranglan is a rural community where agriculture is the main source of livelihood. The Kalanguya Ancestral Domain (KAD) is also located in the area, and it provides a home for the Kalanguya indige... The Municipality of Carranglan is a rural community where agriculture is the main source of livelihood. The Kalanguya Ancestral Domain (KAD) is also located in the area, and it provides a home for the Kalanguya indigenous cultural community. They have fled to the area for a variety of reasons. Despite its rural setting, Carranglan is regarded as a first-class municipality and the largest municipality in Nueva Ecija. This study described and documented the socio-economic profile, and existing issues and problems the Kalanguya Indigenous Peoples (IPs) experienced in their milieu, especially in terms of environmental protection. Recognizing and valuing their perspectives is vital for inclusive development. This study also situated the current status and conditions of the IPs, who generally live below the poverty line and face a range of plights and challenges. As part of safeguarding indigenous rights and interests, this study was undertaken after series of consultations with community elders and leaders. Key informant interviews, household surveys, semi-structured interviews, focused-group discussion (FGD), and direct observations were used to elicit information. Many of the respondents are elementary undergraduates which show that the community had lacked access to education. The following are the primary socioeconomic issues confronting IPs: insufficient access to potable water, suboptimal agricultural productivity, meager monthly income, and a dearth of supplementary and alternative livelihood opportunities. Forest fires, landslides, encroachment of illegal loggers, and concerns about wildlife resources are some of the current environmental issues they have encountered. The local population was supportive of plans and actions targeted at improving the environment. This reveals that the IPs possess unique indigenous forest expertise that enables them to properly manage natural resources. 展开更多
关键词 Indigenous People Rural Development Rural Sociology Environmental Problems and Conservation Extension and Community Intervention Carranglan Nueva Ecija
在线阅读 下载PDF
The Role of C-Reactive Protein, Granulocyte Colony Stimulating Factor and Total Antioxidant Capacity in Diagnosis of Acute Appendicitis
7
作者 Barış Sevinç Ahmet Okuş +2 位作者 Serden Ay Nergis Aksoy Recep Demirgül 《Surgical Science》 2016年第3期177-180,共4页
Background and Aim: Despite the fact that acute appendicitis is the most common surgical emergency all around the world, its diagnosis is still based on clinical evaluation and accuracy of the diagnosis depending on e... Background and Aim: Despite the fact that acute appendicitis is the most common surgical emergency all around the world, its diagnosis is still based on clinical evaluation and accuracy of the diagnosis depending on experience. The aim of this study is to evaluate the role of inflammatory markers in diagnosis of acute appendicitis. Material and Method: The study includes 77 cases with histopathologically proven acute appendicitis and 17 control cases. Blood samples were obtained from all cases and C-reactive protein (CRP), Granulocyte Colony Stimulating Factor (G-CSF) and Total Antioxidant Capacity (TAC) were measured. Findings: In cases with acute appendicitis, CRP and G-CSF levels were found to be related to acute appendicitis;however, TAC was not affected by the disease process. Moreover, CRP and G-CSF levels were correlated with the disease severity. Conclusion: Both CRP and G-CSF can be used in diagnosis of acute appendicitis. Furthermore, increased CRP level can be a marker to show advanced cases. However, G-CSF is not an effective marker to show disease severity. 展开更多
关键词 Acute Appendicitis C-Reactive Protein Granulocyte Colony Stimulating Factor Total Anti-Oxidant Capacity
暂未订购
Optimization of mycelial growth of Xylaria papulis Lloyd(Xylariaceae)in indigenous liquid culture conditions,science city of Muñoz,Nueva Ecija,Philippines
8
作者 Mark Kevin S.Lopez Sofronio P.Kalaw +2 位作者 Rich Milton R.Dulay Angeles M.De Leon Renato G.Reyes 《Studies in Fungi》 2022年第1期176-182,共7页
The search for potential and inexhaustible sources of bioactive compounds with great functional activities is imperative for potential drug leads in treating various human diseases.In this regard,this study investigat... The search for potential and inexhaustible sources of bioactive compounds with great functional activities is imperative for potential drug leads in treating various human diseases.In this regard,this study investigated the optimum liquid medium and physical culture conditions for the mycelial growth of X.papulis Lloyd for nutraceutical studies.The greatest mycelial biomass was achieved in PSB liquid medium among the indigenous media evaluated,such as potato sucrose broth(PSB),corn meal broth(CMB),rice bran broth(RBB),and coconut water(CW).In terms of pH,X.papulis Lloyd was observed to grow in a wide range of pH(5.0−8.5),but the best mycelial growth was observed at pH 6.5.Room temperature of 28℃,lighted(137 lux),and static conditions were the other optimum physical culture conditions for mycelial growth of X.papulis Lloyd. 展开更多
关键词 CULTURE LIQUID OPTIMUM
在线阅读 下载PDF
Simulation of Desert-Scrub Growth: A Forcing to Warmer and More Pluvial Climate
9
作者 Joseph Otterman 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1992年第4期441-450,共10页
Desert-fringe vegetation growing over bright, sandy soils reduces the surface albedo from above 0.4 to well below 0.3. Called desert-scrub, these shrubs form a predominantly vertical clumps protruding from the soil-le... Desert-fringe vegetation growing over bright, sandy soils reduces the surface albedo from above 0.4 to well below 0.3. Called desert-scrub, these shrubs form a predominantly vertical clumps protruding from the soil-level, thereby significantly increasing the coefficient of turbulent heat transfer from the surface. The impact on global and desert-belt climate of changes in these two surface characteristics was simulated by a multi-layer energy balance tnodel. Evaluated only as a forcing to a further climatic change (that is, without accounting for any possible feedbacks) the results are: if vegetation (such as apparently existed under the warmer climate of 6,000 BP ) grows over large areas in the arid, currently bare-soil regions, the annual Northern Hemisphere surface temperature increases by 0.7t (by 0.6'C in July ), the surface temperature over land in the 20-30°N zone increases by 0.9℃ in both the annual and the July means, and the land-ocean annual temperature contrast in this zone increases by 0.25℃(0.2° in July). These results represent the combined influence of the reduction in the surface albedo and of the increase in the coefficient of turbulent heat transfer. In the desert-belt zones, the increase in the transfer coefficient sharply reduces the land temperature and the land-ocean temperature contrast from the values produced by the albedo change alone. This reduction must be attributed to the increased land-to-ocean circulation (which our model does not evaluate explicitly). Considering that a stronger circulation (resulting from land-ocean temperature contrast) generally forces a higher rainfall, the vegetation which emerged in the arid regions during the post-glacial optimum should be considered a significant positive feedback towards a still warmer, and also a more pluvial, climate. Our study may have implications for the 21st century, if the global warming expected from the enhanced greenhouse effects is accompanied by increased precipitation over the continents. 展开更多
关键词 Simulation of Desert-Scrub Growth A Forcing to Warmer and More Pluvial Climate
在线阅读 下载PDF
Optimum Condition of Rice Straw Hydrolysate Detoxification with Charcoal Powder for Cellulosic Ethanol Production by Pichiastipitis TISTR 5806
10
作者 Teerapatr Srinorakutara Yuttasak Subkaree +1 位作者 Nassapat Boonvitthya Nantana Bamrungchue 《Journal of Food Science and Engineering》 2016年第2期75-81,共7页
In this study, the rice straw was hydrolysed by using 3.0% (w/v) H2SO4 followed by enzymatic hydrolysis. The rice straw hydrolysate obtained was treated with charcoal powder and the optimal condition of detoxificati... In this study, the rice straw was hydrolysed by using 3.0% (w/v) H2SO4 followed by enzymatic hydrolysis. The rice straw hydrolysate obtained was treated with charcoal powder and the optimal condition of detoxification with charcoal powder was investigated. The results showed that the optimal condition for detoxification was the use of 2.5 grams of non-sterilized charcoal powder in 100 mL hydrolysate. The mixture was operated at pH 5.0, 30 ℃ and 160 rpm for 5 min. The detoxified hydrolysate was then used for ethanol production using P. stipitis TISTR 5806. The condition of the detoxified hydrolysate fermentation which gave maximum ethanol concentration of 21 g/L was at pH 5.0, 30 ℃ and 160 rpm for 72 h. Without detoxification, the P. stipitis TISTR 5806 could not however utilize the hydrolysate for ethanol production. 展开更多
关键词 DETOXIFICATION charcoal rice straw ethanol fermentation P. stipitis.
在线阅读 下载PDF
Voyage of Ben Cao,Part Ⅱ:Development of Chinese Medicinal Specimens in the British Museum
11
作者 Zhong-Zhen Zhao Eric Brand 《Chinese Medicine and Culture》 2022年第2期126-130,共5页
1 Introduction In 2015,an on-site field investigation was conducted by the authors’research group to authenticate a batch of ancient Chinese medicinal decoction pieces that have been preserved in a rare collection at... 1 Introduction In 2015,an on-site field investigation was conducted by the authors’research group to authenticate a batch of ancient Chinese medicinal decoction pieces that have been preserved in a rare collection at the Natural History Museum in London.These treasured artifacts comprise a portion of the Sloane Collection,and the nearly 100 Chinese medicinal specimens examined within provide an objective record of the real situation regarding Chinese medicinal materials in commercial circulation 300 years ago. 展开更多
关键词 BATCH authentic MEDICINAL
暂未订购
中国北方风沙区典型植物适生区模拟与水资源植被承载力量化
12
作者 吕昉颖 赵媛媛 +2 位作者 省朝龙 高广磊 丁国栋 《干旱区研究》 北大核心 2026年第1期74-85,共12页
本研究定量揭示中国北方风沙区典型固沙植物适生区分布与水资源约束下的植被承载力,确定合理种植密度阈值,为精准防沙治沙提供科学依据。选择梭梭(Haloxylon ammodendron)及樟子松(Pinus sylvestris var.mongolica)为研究对象,融合最大... 本研究定量揭示中国北方风沙区典型固沙植物适生区分布与水资源约束下的植被承载力,确定合理种植密度阈值,为精准防沙治沙提供科学依据。选择梭梭(Haloxylon ammodendron)及樟子松(Pinus sylvestris var.mongolica)为研究对象,融合最大熵模型(MaxEnt)与经典的土壤水资源植被承载力模型。结合2008—2018年土壤水分数据及气候、土壤、地形等数据,分析植物适生区及主导环境因子,并计算基于区域水分平衡的植被最大承载力。结果表明:(1)梭梭潜在适生区约占研究区19%,集中于荒漠草原带,其分布受最冷季度降水和年均温主导;樟子松适生区占48%,核心区在东部科尔沁沙地及典型草原带,受夏冬季极端降水与土壤生根条件限制。(2)水资源承载力空间分异显著,如梭梭在阴山山脉以西的荒漠草原带>10.0×10^(4)株·km^(-2),科尔沁沙地西部、大兴安岭南部山前平原等地区<7.0×10^(4)株·km^(-2)。(3)提出分区种植方案,荒漠草原带梭梭推荐株行距1.5 m×2.0 m;典型草原带樟子松宜采用6.5 m×9.5 m;科尔沁沙地等限制区樟子松降至10.5 m×15.0 m,与实际误差小。研究成果为北方风沙区“以水定绿、适地适树”生态修复提供定量数据支撑,未来需深入研究混交种间水分竞争机制。 展开更多
关键词 水资源植被承载力 中国北方风沙区 潜在适生区 水热条件 土壤水分 模拟
在线阅读 下载PDF
日粮添加不同剂量南瓜粉对育肥牛体外模拟瘤胃发酵参数、生长性能及血液指标的影响
13
作者 田娇娇 王思伟 +5 位作者 崔雯雯 姜慧军 李全宏 王雅晶 田雨佳 王昆 《中国饲料》 北大核心 2026年第3期194-201,共8页
本试验旨在探究日粮添加不同剂量南瓜粉对育肥牛瘤胃发酵参数、生长性能及血液指标的影响。在体外模拟试验中,选择6只月龄、体重相近的育肥牛作为瘤胃液供体,对照组采用基础日粮为底物,试验组在基础日粮底物中添加4%、8%、12%的南瓜粉,... 本试验旨在探究日粮添加不同剂量南瓜粉对育肥牛瘤胃发酵参数、生长性能及血液指标的影响。在体外模拟试验中,选择6只月龄、体重相近的育肥牛作为瘤胃液供体,对照组采用基础日粮为底物,试验组在基础日粮底物中添加4%、8%、12%的南瓜粉,在体外模拟瘤胃发酵培养48 h后,测定产气量和瘤胃发酵参数。在动物试验中,选取13月龄、健康状况良好、体型一致的育肥期公牛24头为研究对象,随机分为4组,每组6个重复。对照组饲喂基础日粮,试验1组、试验2组、试验3组分别在基础日粮中添加30、60、90 g/头南瓜粉,试验持续35 d。体外模拟试验结果表明:与对照组相比,体外发酵48 h试验组累计产气量有提高的趋势但无显著差异(P>0.05);试验1、2、3组干物质降解率较对照组分别提高4.41%、6.76%、7.93%(P>0.05)。试验1、2、3组氨态氮(NH_(3)-N)含量较对照组分别提高10.55%、18.92%、16.29%(P<0.01)。动物试验结果表明:试验2组和试验3组育肥终末体重较对照组分别提高3.03%和0.89%(P>0.05)。试验1、2、3组NH_(3)-N含量分别较对照组提高10.55%、18.92%、16.29%(P<0.01)。试验3组丁酸、乙酸比丙酸较对照组分别极显著提高28.03%、7.63%(P<0.01)。饲喂南瓜粉显著增加了育肥牛血常规中血清抗氧化指标尿素氮(BUN)、C-反应蛋白(CRP)分布宽度变异系数(P<0.05)。试验第14天,试验3组血清中BUN含量较对照组提高18.29%(P<0.01)。试验2组和试验3组血清中CRP含量较对照组分别提高54.42%和46.94%(P<0.05)。试验第28天,试验1、2、3组血清中BUN含量较对照组分别提高了38.91%、21.82%、34.55%(P<0.01)。综上所述,日粮添加南瓜粉能够提高育肥牛体外瘤胃发酵特性以及其生长发育、生产性能和血清指标,建议日粮中南瓜粉的适宜添加量为60 g/头。 展开更多
关键词 南瓜粉 体外瘤胃发酵 血清指标 生长性能 育肥牛
在线阅读 下载PDF
蛋白桑3种灌木化栽培对比试验研究
14
作者 马博 罗竹梅 +4 位作者 刘米利 刘晓莉 张晨晨 齐昆 段义忠 《陕西林业科技》 2026年第1期49-52,共4页
为探索榆林沙地蛋白桑灌木化栽培的最佳方案,本研究以“丰驰2号”蛋白桑为对象,在陕西省榆林市榆阳区(毛乌素沙区)设置单枝下移式、单枝上移式、多分枝式3种平茬处理(随机区组设计,3次重复),测定其生长特性、光合参数、枝叶产量及营养... 为探索榆林沙地蛋白桑灌木化栽培的最佳方案,本研究以“丰驰2号”蛋白桑为对象,在陕西省榆林市榆阳区(毛乌素沙区)设置单枝下移式、单枝上移式、多分枝式3种平茬处理(随机区组设计,3次重复),测定其生长特性、光合参数、枝叶产量及营养成分。结果显示:1.生长指标:单枝下移式、单枝上移式的叶面积(分别为110.35 cm^(2)、98.26 cm^(2))、株高(分别为83.57 cm、79.85 cm)显著高于多分枝式(叶面积67.96 cm^(2)、株高55.38 cm,P<0.05);2.光合参数:3种方式的净光合速率(8.39~9.21μmol·m^(-2)·s^(-1))、蒸腾速率等指标无显著差异;3.枝叶产量:多分枝式单株总生物量(115.08 g)及单位面积干物质(5754.1 kg/hm^(2))显著高于单枝下移式(4701.5 kg/hm^(2))、单枝上移式(4375.5 kg/hm^(2),P<0.05);4.营养成分:多分枝式叶片粗蛋白含量(19.17%)显著高于单枝下移式(18.58%)、单枝上移式(18.29%,P<0.05)。综合单位面积枝叶产量与粗蛋白含量,建议榆林沙地优先推广多分枝式平茬模式,为沙区蛋白桑饲料化利用提供技术支撑。 展开更多
关键词 蛋白桑 灌木化栽培 平茬方式 沙地 粗蛋白
在线阅读 下载PDF
Model test and numerical simulation of a new prefabricated double-row piles retaining system in silty clay ground 被引量:2
15
作者 Ruisong Wang Hao Yang +6 位作者 Pengpeng Ni Chenyang Zhao Chengchao Guo Huihuan Ma Pu Dong Huqing Liang Mengxiong Tang 《Underground Space》 SCIE EI CSCD 2023年第6期262-280,共19页
This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay ground.Laboratory model test and numerical simulation are conducted to study the system behavior upo... This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay ground.Laboratory model test and numerical simulation are conducted to study the system behavior upon excavation.The horizontal displacement(δ_(h)),Von Mises stress(δ_(M)),strain(ε),ground surface settlement(δ_(v)),and earth pressure are systematically investigated.Furthermore,the monitoring data of 13 excavation cases supported by double-row piles retaining system are presented and discussed.The experimental results can basically match the numerical results,and the maximumδ_(M),maximum bending moment(M_(max)),maximum horizontal displacement(δ_(hm))of structural members are all less than the tolerance limits.The ground surface settlement model of double-row piles retaining system consists of three zones,i.e.,rebound influence zone,primary influence zone and secondary influence zone.The dhm values are 0.07%–1.42%of the excavation depth(He).The maximum ground surface settlement(δ_(vm))is generally less than dhm.The ratio ofδ_(vm)=δ_(hm)varies between 0.09 and 0.76,with an average value of 0.5.The observed earth pressure on the retained side of front pile(paf)is about 0.53–0.57γH below the excavation surface.Above the excavation surface,p_(af)decreases dramatically when getting closer to the ground surface. 展开更多
关键词 Prefabricated recyclable structure Double-row piles retaining system Physical model test Numerical simulation DEFORMATION
在线阅读 下载PDF
白于山区典型植被类型植物的物种多样性研究
16
作者 刘喜东 马雅莉 +4 位作者 付守平 刘艳什 田亚君 石孟迪 石长春 《西北林学院学报》 北大核心 2026年第1期37-47,69,共12页
对白于山区典型植被群落开展调查,为白于山区的生物多样性保护与植被恢复,以及“三北”攻坚提供科学依据。在广泛查阅白于山区相关资料及总结区域科考成果的基础上,以不同植物类型和立地条件为基础,采用样线调查法,选取37个代表性样地,... 对白于山区典型植被群落开展调查,为白于山区的生物多样性保护与植被恢复,以及“三北”攻坚提供科学依据。在广泛查阅白于山区相关资料及总结区域科考成果的基础上,以不同植物类型和立地条件为基础,采用样线调查法,选取37个代表性样地,基于APG分类系统进行群落植物多样性调查。结果表明:1)白于山区共有35科83属105种植物,其中野生种74种,栽培种31种,裸子植物2科4属6种,被子植物33科79属99种;被子植物中,双子叶植物30科69属88种,单子叶植物3科10属11种。2)科内种数由多到少为菊科>豆科>蔷薇科>禾本科>苋科>唇形科>杨柳科>夹竹桃科>松科>柏科>白刺科>柽柳科>胡颓子科>堇菜科>其他(1科1属1种的植物),蔷薇科、豆科、菊科、禾本科为优势科,共贡献48.57%的植物多样性。3)不同立地条件下的植被种类数量呈峁>涧>梁>沟>壑>塬>滩地的变化规律,优势种数量呈梁>峁>涧>壑>沟>塬>滩地的变化规律;除滩地和塬地以外,针叶树均为各立地条件下的优势种。4)白于山区物种多样性分析表明,Patrick丰富度指数(R)、Shannon-Wiener多样性指数(H)、Simpson多样性指数(D)均呈草本>乔木>灌木的变化规律。白于山区植被群落丰富度较低,草本层在群落中占主导地位,在后期植被恢复中,应遵循“先保草本固立地、再引灌木构灌草、后适度配乔木”的分阶段策略,逐步构建灌草为主、乔灌草结合的稳定群落,实现生态改善与丰富度提升。 展开更多
关键词 白于山区 物种多样性 多样性指数
在线阅读 下载PDF
一座城市的记忆与未来 蒙特利尔市政厅
17
作者 Raphaël Thibodeau(摄影) 西竹(编译) 《室内设计与装修》 2026年第1期132-137,共6页
蒙特利尔市政厅初建于1872—1878年,是加拿大国家历史遗址,也是全国第一座专为市政管理而建造的建筑。其宏伟的第二帝国风格与巨大体量,既彰显了19世纪末蒙特利尔在北美的崛起,也致敬了其深厚的法国传统。在经历1922年的一场大火后,建... 蒙特利尔市政厅初建于1872—1878年,是加拿大国家历史遗址,也是全国第一座专为市政管理而建造的建筑。其宏伟的第二帝国风格与巨大体量,既彰显了19世纪末蒙特利尔在北美的崛起,也致敬了其深厚的法国传统。在经历1922年的一场大火后,建筑仅余石墙,1925年重建时保留原墙并加高一层。这座市政厅的修复工程意义重大,至今仍是魁北克省规模最大、影响力最深远的遗产保护项目之一。 展开更多
关键词 第二帝国风格 蒙特利尔市政厅
在线阅读 下载PDF
Identifying patient-specific flow of signal transduction perturbed by multiple single-nucleotide alterations
18
作者 Olha Kholod Chi-Ren Shyu +2 位作者 Jonathan Mitchem Jussuf Kaifi Dmitriy Shin 《Quantitative Biology》 CAS CSCD 2020年第4期336-346,共11页
Background:Identifying patient-specific flow of signal transduction perturbed by multiple single-nucleotide alterations is critical for improving patient outcomes in cancer cases.However,accurate estimation of mutatio... Background:Identifying patient-specific flow of signal transduction perturbed by multiple single-nucleotide alterations is critical for improving patient outcomes in cancer cases.However,accurate estimation of mutational effects at the pathway level for such patients remains an open problem.While probabilistic pathway topology methods are gaining interest among the scientific community,the overwhelming majority do not account for network perturbation effects from multiple single-nucleotide alterations.Methods:Here we present an improvement of the mutational forks formalism to infer the patient-specific flow of signal transduction based on multiple single-nucleotide alterations,including non-synonymous and synonymous mutations.The lung adenocarcinoma and skin cutaneous melanoma datasets from TCGA Pan-Cancer Atlas have been employed to show the utility of the proposed method.Results:We have comprehensively characterized six mutational forks.The number of mutated nodes ranged from one to four depending on the topological characteristics of a fork.Transitional confidences(TCs)have been computed for every possible combination of single-nucleotide alterations in the fork.The performed analysis demonstrated the capacity of the mutational forks formalism to follow a biologically explainable logic in the identification of high-likelihood signaling routes in lung adenocarcinoma and skin cutaneous melanoma patients.The findings have been largely supported by the evidence from the biomedical literature.Conclusion:We conclude that the formalism has a great chance to enable an assessment of patient-specific flow by leveraging information from multiple single-nucleotide alterations to adjust the transitional likelihoods that are solely based on the canonical view of a disease. 展开更多
关键词 mutational forks signaling pathways CANCER single-nucleotide alterations
原文传递
基于TSO-LSTM的粮食霉变预测与智能测控系统研究
19
作者 黄子睿 杨铮 +3 位作者 陈希 程家豪 胡绍增 黄勇刚 《粮食与饲料工业》 2026年第1期19-25,共7页
为解决粮食存储过程中的霉变问题,提出了一种基于TSO-LSTM的粮食霉变预测及智能测控系统。首先,搭建粮食霉变数据采集系统,并给出系统的整体框架;然后采用金枪鱼优化算法(TSO)对LSTM预测模型进行参数优化求解,以选出LSTM最佳参数;将测... 为解决粮食存储过程中的霉变问题,提出了一种基于TSO-LSTM的粮食霉变预测及智能测控系统。首先,搭建粮食霉变数据采集系统,并给出系统的整体框架;然后采用金枪鱼优化算法(TSO)对LSTM预测模型进行参数优化求解,以选出LSTM最佳参数;将测试集输入至搭建的TSO-LSTM预测模型中,以实现粮食霉变的精准预测。实验结果表明,该模型的准确率、F1值分别为98.46%和97.33%,预测时长仅为6.45 ms,对比于先进的WOA-XGBoost模型、GAT-Informer模型、PSO-LSSVM模型和CEEMD-LSTM预测模型,该模型的F1值分别高出了17.02%、9.68%、12.95%和6.11%,预测时长分别降低了20.25、10.43、13.87和4.39 ms。由此说明,该模型可提高粮食霉变预测精度和效率。将该模型部署至搭建的粮食存储测控系统进行测试,得出该系统可实现粮食存储情况实时监测和预警,满足实际应用需求,具备有效性。 展开更多
关键词 LSTM神经网络 粮食存储 金枪鱼优化算法 霉变预测 测控系统
在线阅读 下载PDF
可印刷柔性传感器在人体健康监测中的研究进展 被引量:4
20
作者 邵艳秋 任婷 +7 位作者 王迪 姬旭 柳林 杨荟 杨皓婷 张吉振 陶金龙 孔娜 《材料导报》 北大核心 2025年第12期24-32,共9页
随着可穿戴技术的迅速发展,可印刷柔性传感器作为一种创新的传感器制备方法,已在人体健康监测领域取得了显著的研究进展。本文综述了可印刷柔性传感器在人体健康监测中的研究现状,从印刷方式、传感机制以及材料性质等角度出发,并结合可... 随着可穿戴技术的迅速发展,可印刷柔性传感器作为一种创新的传感器制备方法,已在人体健康监测领域取得了显著的研究进展。本文综述了可印刷柔性传感器在人体健康监测中的研究现状,从印刷方式、传感机制以及材料性质等角度出发,并结合可印刷柔性传感器的灵敏度、稳定性、重现性等方面对目前的可印刷柔性传感器展开了系统的总结。最后,进一步讨论了可印刷柔性传感器在新型可穿戴电子设备和人体疾病防控等领域的应用,并展望了可印刷柔性传感器在实际应用和发展过程中面临的一些挑战。 展开更多
关键词 柔性传感器 健康监测 导电材料 可穿戴设备
在线阅读 下载PDF
上一页 1 2 26 下一页 到第
使用帮助 返回顶部