期刊文献+
共找到37,084篇文章
< 1 2 250 >
每页显示 20 50 100
Trends in Occupational Environmental Hazardous Factors and Health Damage:Based on Data from Yangzhou City over Three Years
1
作者 Faqiang Li Zhen Li 《Journal of Clinical and Nursing Research》 2025年第9期388-395,共8页
Objective:To analyze the trends in occupational environmental hazardous factors and health damage,and to assess the degree of occupational health risks.Methods:A total of 1,733 occupational disease monitoring data poi... Objective:To analyze the trends in occupational environmental hazardous factors and health damage,and to assess the degree of occupational health risks.Methods:A total of 1,733 occupational disease monitoring data points from workplaces collected by the Yangzhou Center for Disease Control and Prevention from January 2019 to December 2021 were selected to evaluate occupational hazard factors and occupational health risk levels.Results:Over the three-year period,there were 525 monitoring samples for dust exposure,with an exceedance rate of 1.71%(9/525);791 monitoring samples for noise exposure,with an exceedance rate of 4.42%(35/791);and 417 monitoring samples for chemical toxins(exogenous)exposure,with an exceedance rate of 1.68%(7/417).A comprehensive evaluation of exceedance factors revealed that high-risk factors included silica dust and benzene,classified as Level 4,while medium-risk factors encompassed manganese and xylene,including their compounds,classified as Level 3.Conclusion:After long-term monitoring of multiple workplaces in the city,it was found that there were certain occupational hazard factors,specifically involving dust or noise,as well as related factors of chemical toxins.Among these,silica dust and benzene posed the highest risks,while manganese and xylene also carried relatively high risks.It is necessary to strengthen occupational disease prevention and management to reduce the occurrence risks. 展开更多
关键词 Workplaces in Yangzhou city Occupational diseases Hazard factor monitoring Occupational health risk assessment
暂未订购
The Application of Plant Culture in Architectural Decorations of Classical Gardens of Yangzhou
2
作者 li li qian zeyu +1 位作者 ju ping du qingping 《Journal of Landscape Research》 2018年第6期118-122,共5页
Investigations were made on the various plant patterns which appeared in the decorations of the two types of gardens, namely private gardens and temple gardens in Yangzhou. Analysis was made of the application of plan... Investigations were made on the various plant patterns which appeared in the decorations of the two types of gardens, namely private gardens and temple gardens in Yangzhou. Analysis was made of the application of plant elements in each location, their implication of the traditional culture, and the relationship between the garden style, theme and artistic conception, aiming to provide a reference for the application of plant culture in the future garden decorations design. 展开更多
关键词 CLASSICAL GARDEN ARCHITECTURAL decorations PLANT CULTURE Yangzhou
在线阅读 下载PDF
Social Classes and Cultural Connotations of Yangzhou Home Gardens during the Late Qing Dynasty and the Republic of China
3
作者 ZHANG Lihui 《Journal of Landscape Research》 2016年第6期102-106,共5页
During the late Qing Dynasty and the early period of the Republic of China(1870-1930),the social classes in Yangzhou were basically dominated by officials,businessmen,and scholars.In the building number,scale,and func... During the late Qing Dynasty and the early period of the Republic of China(1870-1930),the social classes in Yangzhou were basically dominated by officials,businessmen,and scholars.In the building number,scale,and functional evolution of their home gardens,these three classes were different,reflecting abundant connotation of characteristic of the time and regional culture,revealing the inheritance path of Yangzhou culture,as well as the richness and diversity of home gardens in Yangzhou during the late Qing Dynasty and the early period of the Republic of China. 展开更多
关键词 Social classes The late Qing Dynasty and the early period of the Republic of China Yangzhou home gardens Type characteristics Cultural connotation
在线阅读 下载PDF
Research on the Public Perception of Yangzhou Historical and Cultural Districts Based on Network Review Text Analysis
4
作者 WU Tao SHAO Yuanhua 《Journal of Landscape Research》 2023年第3期36-41,共6页
The historical and cultural districts of a city serve as important cultural heritage and tourism resources.This paper focused on four such districts in Yangzhou and performed semantic analysis on online public comment... The historical and cultural districts of a city serve as important cultural heritage and tourism resources.This paper focused on four such districts in Yangzhou and performed semantic analysis on online public comments using ROST CM6 software.According to the high frequency words,attention preference of district site elements,activities and feelings in Yangzhou historical and cultural districts were analyzed.Through the analysis of semantic network and public emotional tendency,the relationship between the protection and utilization of Yangzhou historical and cultural districts and the perception and demand of users were discussed,and some suggestions for the protection,utilization and renewal of historical and cultural districts were put forward. 展开更多
关键词 Yangzhou historical and cultural districts Text analysis Public perception Protection and renewal
在线阅读 下载PDF
Technical Guidelines for Renovation of Yangzhou Traditional Dwellings and Its Compilation
5
作者 Jiahao SHI Chuan LIU Yanan 《Journal of Landscape Research》 2022年第5期110-118,共9页
With the evolution of the renewal concept and protection mode of dwellings in ancient city in the new era,the guidelines for the renovation of dwellings compiled in the past have shown obvious limitations of the times... With the evolution of the renewal concept and protection mode of dwellings in ancient city in the new era,the guidelines for the renovation of dwellings compiled in the past have shown obvious limitations of the times.Its compilation form is too simple,and the content is slightly insufficient,and it is difficult to scientifically guide the high-standard renovation of traditional dwellings in the new era.In the compilation of the Technical Guidelines for Renovation of Yangzhou Traditional Dwellings,the core concept is “continuing the style and texture of the ancient city,inheriting the construction technology of private houses,and integrating innovative renovation techniques”,and an overall framework for integrating the technical guidelines for renovation of traditional dwellings in “new era and new concept” is proposed.The classification guidance standards for different types of traditional dwellings and their surrounding ancillary environment are formulated,and the corresponding renovation plans of traditional dwellings are systematically drawn as supplementary guidance documents for the relevant classification guidance standards. 展开更多
关键词 Traditional dwelling RENOVATION GUIDELINE Yangzhou
在线阅读 下载PDF
Functional Features and Layouts of Yangzhou Residential Gardens in the Late Qing Dynasty and the Early Republic of China: A Case Study of Residential Gardens of Officials, Merchants and Literati
6
作者 ZHANG Lihui ZHANG Yue 《Journal of Landscape Research》 2015年第4期39-43,共5页
On the basis of analyzing socio-economic structures, social classes and their relations in the late Qing Dynasty and the early Republic of China, this paper took residential gardens of three principal groups(officials... On the basis of analyzing socio-economic structures, social classes and their relations in the late Qing Dynasty and the early Republic of China, this paper took residential gardens of three principal groups(officials, merchants and literati) for example, analyzed functional features and layouts of the gardens, explored artistic characteristics and cultural connotations of the local residential gardens, so as to provide references for the conservation and construction of historic and cultural cities, design and expression of modern urban livable spaces. 展开更多
关键词 Late Qing Dynasty and early Republic of China Residential gardens in Yangzhou Functional features LAYOUTS
在线阅读 下载PDF
The Integration and Communication of Regional Culture in Canal Landscape Planning and Design:A Case Study of the Grand Canal in the Gaomin Temple Section of Yangzhou 被引量:1
7
作者 FENG Xinyu 《Journal of Landscape Research》 2018年第6期77-80,85,共5页
The Grand Canal is the cultural source of Yangzhou's historical development. The heritage and development of the canal culture are conducive to enhancing the image of Yangzhou, building cultural brands, and enhanc... The Grand Canal is the cultural source of Yangzhou's historical development. The heritage and development of the canal culture are conducive to enhancing the image of Yangzhou, building cultural brands, and enhancing core competitiveness. Taking the canal in the Gaomin Temple section of Yangzhou for example, this study was based on the regional canal culture and the humanistic characteristics of Gaomin Temple, and explored the unique cultural communication mode of the important landscape node of the canal. Through the analysis of the status and development of the landscape of the section, this study concluded corresponding cultural orientation content and direction, and analyzed the integration and communication ideas of regional culture in landscape planning and design, in order to provide a reference for the promotion of cultural brands in the canal city of Yangzhou. 展开更多
关键词 GRAND CANAL Gaomin TEMPLE LANDSCAPE planning and design Regional culture Integration COMMUNICATION
在线阅读 下载PDF
Current Situation and Development of Technology Extension System for Suburban Agriculture:A Case Study of Hanjiang District of Yangzhou City 被引量:1
8
作者 Jing GUO Zhengqin SHA +2 位作者 Luying JI Sheng GE Wuguang YANG 《Asian Agricultural Research》 2015年第3期51-55,共5页
Through the survey on agricultural technology extension system in Hanjiang District of Yangzhou City,this paper analyzed possible problems in the agricultural technology extension system.Combining with newly revised A... Through the survey on agricultural technology extension system in Hanjiang District of Yangzhou City,this paper analyzed possible problems in the agricultural technology extension system.Combining with newly revised Agricultural Technology Extension Law and modern agricultural extension theory,it discussed the new development direction.Finally,it came up with approaches and measures for establishing the agricultural technology extension system in Hanjiang District. 展开更多
关键词 Hanjiang DISTRICT AGRICULTURAL TECHNOLOGY extensio
在线阅读 下载PDF
Utilization Survey of Livestock Manure Resources in Large-scale Farms of Yangzhou
9
作者 ZHANG Yue-ping MAO Wei LI Wen-xi 《Animal Husbandry and Feed Science》 CAS 2013年第1期37-40,49,共5页
Based on surveying the conditions of large -scale farms and commercial manure in the each county of Yangzhou city, the situations and problems for utilization of livestock manure resources were grasped. After an analy... Based on surveying the conditions of large -scale farms and commercial manure in the each county of Yangzhou city, the situations and problems for utilization of livestock manure resources were grasped. After an analysis of the potential value of livestock manure, the suggestion and strategy for utilization of livestock manure resources were proposed based on the actual conditions in Yangzhou city. 展开更多
关键词 Large - scale farms Livestock manure Resources utilization
在线阅读 下载PDF
What Museums Can Do amid the Covid-19 Pandemic:A Case Study of Yangzhou Museum
10
作者 Xingli Wang 《Sociology Study》 2022年第6期249-253,共5页
China suffered the new wave of indigenous COVID-19 epidemic emanating in 2022.Yangzhou as one of cities of Jiangsu,took one of its worst poundings since the epidemic broke out.The epidemic hit the city,with substantia... China suffered the new wave of indigenous COVID-19 epidemic emanating in 2022.Yangzhou as one of cities of Jiangsu,took one of its worst poundings since the epidemic broke out.The epidemic hit the city,with substantial impact on their cultural undertakings.This article gives an account of how the museums and their local communities in Yangzhou have responded to the calamities,analyzes their interactions,and shares the museum experiences of organizing cultural activities jointly with the craftspeople of local intangible cultural heritage since 2020,when COVID-19 broke out. 展开更多
关键词 COVID-19 local INTANGIBLE cultural heritage rice-paper FLOWERS MUSEUM
在线阅读 下载PDF
Analysis on Results of Test and Supervision for Oxidative Hair Dyes Samples in Yangzhou from 2013 to 2018
11
作者 Ling Zhen Ding Susu +3 位作者 Liu Hui Yao Jingjing Zhu Qingli Wang Wei 《China Detergent & Cosmetics》 2019年第2期58-61,共4页
According to Hygienic Standard for Cosmetics (2007 Edition) and Safety and Technical Standards for Cosmetics (2015 Edition), Oxidative Hair Dyes were supervised and inspected in Yangzhou from 2013 to 2018. P-Phenylene... According to Hygienic Standard for Cosmetics (2007 Edition) and Safety and Technical Standards for Cosmetics (2015 Edition), Oxidative Hair Dyes were supervised and inspected in Yangzhou from 2013 to 2018. P-Phenylenediamine and other 6 kinds of components from 85 batches of samples were determined and analyzed by HPLC. Only one batch of samples had not passed test, o-Phenylenediamine was detected that should be prohibited in hair dyes. The results of supervision and inspection for oxidative hair dyes were good in Yangzhou from 2013 to 2018. 展开更多
关键词 OXIDATIVE HAIR DYES COSMETICS P-PHENYLENEDIAMINE SUPERVISION and inspection
在线阅读 下载PDF
噬菌体裂解酶防控食源性病原菌研究进展
12
作者 张小燕 唐梦君 +4 位作者 周倩 郭翔宇 唐修君 陆俊贤 高玉时 《现代食品科技》 北大核心 2026年第2期375-383,共9页
食源性致病菌是危害人类健康和社会经济的重要因素,食品从“农场”到“餐桌”全链条过程中的各个环节都有可能被致病菌污染而引发食源性疾病。随着全球耐药问题的日益严峻,迫切需要研发食源性病原菌新型控制方法。噬菌体裂解酶是大部分... 食源性致病菌是危害人类健康和社会经济的重要因素,食品从“农场”到“餐桌”全链条过程中的各个环节都有可能被致病菌污染而引发食源性疾病。随着全球耐药问题的日益严峻,迫切需要研发食源性病原菌新型控制方法。噬菌体裂解酶是大部分烈性噬菌体合成的活性蛋白,能裂解细菌细胞壁,作为一种杀菌功能蛋白,因其较强的杀菌活性、宿主特异性、不易产生耐药及具有工程改造潜力等特点而受到研究者们越来越多的关注。本综述描述了噬菌体裂解酶的分类、结构及杀菌特性,讨论了革兰氏阴性菌噬菌体裂解酶的增效策略,总结了噬菌体裂解酶防控食源性致病菌的最新研究进展并展望了其应用前景,以期为耐药食源性病原菌的防控新策略提供参考。 展开更多
关键词 噬菌体裂解酶 食源性病原菌 防控
在线阅读 下载PDF
育成期代谢能摄入量对7~24周龄蛋鸡生长发育、性成熟和早期蛋重的影响
13
作者 卢建 马猛 +2 位作者 封丽华 张欣 曲亮 《动物营养学报》 北大核心 2026年第1期277-291,共15页
本试验旨在研究育成期代谢能(ME)摄入量对7~24周龄蛋鸡生长发育、性成熟和早期蛋重的影响。选择540只6周龄末海兰褐蛋鸡,随机分成3个组,每组6个重复,每个重复30只鸡。7~15周龄,对照组、90%ME组、80%ME组饲粮ME水平分别为12.34、11.11和9... 本试验旨在研究育成期代谢能(ME)摄入量对7~24周龄蛋鸡生长发育、性成熟和早期蛋重的影响。选择540只6周龄末海兰褐蛋鸡,随机分成3个组,每组6个重复,每个重复30只鸡。7~15周龄,对照组、90%ME组、80%ME组饲粮ME水平分别为12.34、11.11和9.87 MJ/kg,其他营养水平相同;16~24周龄,各组蛋鸡均饲喂相同的试验饲粮,自由采食。试验期18周。结果表明:1)随7~15周龄ME摄入量减少,7~12周龄和13~15周龄的平均日增重(ADG)显著线性降低(P<0.05),料重比(F/G)显著线性增加(P<0.05);16~18周龄的平均日采食量(ADFI)和平均日代谢能摄入量(ADMEI)显著线性增加(P<0.05);16~18周龄和19~24周龄的ADG显著线性增加(P<0.05),F/G显著线性降低(P<0.05);7~24周龄的ADMEI以及7~12周龄、16~18周龄、19~24周龄和7~24周龄的代谢能转化比(MECR)显著线性降低(P<0.05)。2)随7~15周龄ME摄入量减少,9、12、14、15、16、17周龄体重显著线性降低(P<0.05),但23周龄体重显著线性增加(P<0.05);12、14、15、17、18、23、24周龄体重变异系数(CV)显著线性降低(P<0.05)。3)随7~15周龄ME摄入量减少,15周龄的股骨、胫骨和跖骨长度体重比以及股骨和胫骨指数显著线性增加(P<0.05),腹脂率显著线性降低(P<0.05);18周龄的腹脂率呈先增加后降低的二次曲线变化(P<0.05),输卵管长度、重量、长度体重比和指数显著线性降低(P<0.05)。4)随7~15周龄ME摄入量减少,开产日龄、50%产蛋率日龄、前3个蛋平均重量和前7个蛋平均重量显著线性增加(P<0.05)。80%ME组的19~24周龄蛋重<46 g和46~50 g的鸡蛋占比显著低于对照组(P<0.05),蛋重>60 g的鸡蛋占比显著高于对照组(P<0.05)。由此可见,在7~15周龄,90%或80%ME摄入量影响了蛋鸡体重,但这种影响在转换成自由采食3周后(18周龄)消失,且改善了蛋鸡的群体均匀度,减少了7~24周龄蛋鸡的ADMEI,提高了MECR;90%或80%ME摄入量改善了15周龄蛋鸡骨骼发育,对18周龄蛋鸡屠体、内脏器官和骨骼发育无不良影响;80%ME摄入量延迟了生殖器官发育和性成熟,增加了早期蛋重。其中,80%ME组蛋鸡在MECR、生长发育、群体均匀度和早期蛋重等方面表现更佳。 展开更多
关键词 蛋鸡 代谢能摄入量 育成期 生长发育 性成熟 早期蛋重
在线阅读 下载PDF
基于主成分分析法的清水鸽蛋光泽度评价模型的建立
14
作者 常玲玲 张蕊 +4 位作者 汤青萍 沈欣悦 穆春宇 付胜勇 卜柱 《黑龙江畜牧兽医》 北大核心 2026年第1期154-158,共5页
为了更加快速、准确、客观地评价清水鸽蛋光泽度,并建立清水鸽蛋品质等级划分标准,试验将1 000枚蛋壳无裂缝、蛋重为20~26 g的生鲜鸽蛋加工为清水鸽蛋后,在每个清水鸽蛋表面随机选择3个位点进行明暗度L*、红绿色a*、黄蓝色b*、色彩饱和... 为了更加快速、准确、客观地评价清水鸽蛋光泽度,并建立清水鸽蛋品质等级划分标准,试验将1 000枚蛋壳无裂缝、蛋重为20~26 g的生鲜鸽蛋加工为清水鸽蛋后,在每个清水鸽蛋表面随机选择3个位点进行明暗度L*、红绿色a*、黄蓝色b*、色彩饱和度c和色调角h的测定,采用主成分分析法建立光泽度评价模型;随机选择60枚清水鸽蛋进行感官评分并采用所建模型进行光泽度评价,对鸽蛋光泽度评价模型F值(表示光泽度)和感官评分值进行相关性分析和多元logistic回归分析,验证该模型的准确性;根据鸽蛋光泽度评价模型F值的分布情况及“低等级鸽蛋比例不高于20%”的原则,将清水鸽蛋按品质优劣进行等级划分,建立清水鸽蛋品质等级划分标准。结果表明:主成分分析中前两个主成分累积方差贡献率为85.617%,且特征值均大于1,可用于对鸽蛋光泽度进行评价;建立的清水鸽蛋光泽度评价模型的拟合方程为F=-0.323 ZL+0.378 Za+0.034 Zb-0.176 Zc+0.321 Zh(其中ZL、Za、Zb、Zc和Zh分别代表标准化的明暗度L*、红绿色值a*、黄蓝色值b*、色彩饱和度c和色调角h),清水鸽蛋光泽度评价模型F值和感官评分呈极显著负相关(P<0.01),且呈一元二次曲线关系,提示所建模型可准确反映清水鸽蛋的光泽度。将清水鸽蛋按照品质优劣划分为特优级、一级和二级共3个等级,分级范围分别为F>1、1≥F≥-1、F<-1。说明基于主成分分析法建立的清水鸽蛋光泽度评价模型准确性高,可用于清水鸽蛋加工生产线进行品质分级。 展开更多
关键词 清水鸽蛋 主成分分析 光泽度 评价模型 蛋品质
原文传递
饲粮磷水平对蛋鸽产蛋性能、蛋壳质量及血浆生化指标的影响
15
作者 付胜勇 常玲玲 +6 位作者 汤青萍 沈欣悦 穆春宇 张蕊 高雯 张丹 卜柱 《动物营养学报》 北大核心 2026年第2期1158-1168,共11页
本试验旨在研究饲粮磷水平对蛋鸽产蛋性能、蛋壳质量及血浆生化指标的影响。选取360对12月龄双母拼对银羽王鸽,随机分为6个组,每组5个重复,每个重复12对,分别饲喂有效磷水平为0.08%(1组)、0.19%(2组)、0.30%(3组)、0.42%(4组)、0.53%(5... 本试验旨在研究饲粮磷水平对蛋鸽产蛋性能、蛋壳质量及血浆生化指标的影响。选取360对12月龄双母拼对银羽王鸽,随机分为6个组,每组5个重复,每个重复12对,分别饲喂有效磷水平为0.08%(1组)、0.19%(2组)、0.30%(3组)、0.42%(4组)、0.53%(5组)和0.64%(6组)的等能、等蛋白质、等钙试验饲粮。预试期2周,正试期6个月,分为前期(第1~2个月)、中期(第3~4个月)和后期(第5~6个月)3个阶段。结果表明:1)饲粮磷水平显著影响试验前期平均蛋重及全期产蛋数、产蛋重、平均日采食量(P<0.05),极显著影响试验中期产蛋数和产蛋重、试验中期及全期料蛋比(P<0.01)。3组、4组、5组和6组试验前期平均蛋重显著高于1组(P<0.05);4组、5组和6组试验全期产蛋数和产蛋重显著高于1组(P<0.05),试验中期产蛋数和产蛋重极显著高于1组(P<0.01),试验中期和全期料蛋比极显著低于1组(P<0.01)。试验中期、后期及全期均以4组产蛋数和产蛋重最高、料蛋比最低。2)饲粮磷水平显著影响试验中期蛋壳百分数和蛋壳厚度(P<0.05),极显著影响试验中期和后期蛋壳重及试验后期蛋壳百分数和蛋壳厚度(P<0.01),有影响试验后期蛋壳强度的趋势(P=0.092)。1组试验中期蛋壳重、蛋壳厚度及试验后期蛋壳重、蛋壳百分数、蛋壳厚度均显著或极显著低于4组、5组和6组(P<0.05或P<0.01)。3)饲粮磷水平显著影响血浆甲状旁腺素(PTH)浓度(P<0.05),但对血浆磷、钙浓度及碱性磷酸酶(ALP)活性无显著影响(P>0.05)。血浆钙浓度以4组为最高,而血浆ALP活性和PTH浓度以4组为最低。综上所述,本试验条件下,饲粮最佳有效磷水平为0.42%,该水平下蛋鸽料蛋比最低、产蛋重最高,同时可改善蛋壳质量。 展开更多
关键词 蛋鸽 产蛋性能 蛋壳质量 血浆生化指标
在线阅读 下载PDF
地方鸡和高产蛋鸡育成期生长发育和血液生化指标比较研究
16
作者 沈海玉 卢建 +3 位作者 李永峰 王星果 马猛 曲亮 《中国家禽》 北大核心 2026年第3期163-168,共6页
为明确地方鸡与高产蛋鸡育成期生长发育的品种特异性差异,试验以如皋黄鸡(地方型)和海兰褐蛋鸡(商业型)为素材,系统测定并比较7~15周龄体重及生长性能,并分析15周龄体尺、屠体、内脏器官、骨骼和消化道发育以及血液生化指标的差异。结... 为明确地方鸡与高产蛋鸡育成期生长发育的品种特异性差异,试验以如皋黄鸡(地方型)和海兰褐蛋鸡(商业型)为素材,系统测定并比较7~15周龄体重及生长性能,并分析15周龄体尺、屠体、内脏器官、骨骼和消化道发育以及血液生化指标的差异。结果显示:7~15周龄海兰褐蛋鸡的体重、平均日采食量和平均日增重均显著高于如皋黄鸡(P<0.05);如皋黄鸡7~9周龄料重比显著高于海兰褐蛋鸡(P<0.05),10周龄后两品种间料重比无显著差异(P>0.05)。15周龄时,海兰褐蛋鸡的体斜长、龙骨长和胫长,腿比率、腿肌率,心脏指数、脾脏指数及胫骨、股骨和跖骨长度重量、腺胃、肌胃和不同肠段重量以及十二指肠长度均显著高于如皋黄鸡(P<0.05),而如皋黄鸡腹脂率显著高于海兰褐蛋鸡(P<0.05);两品种其他生长发育指标及各项血液生化指标相比较均无显著差异(P>0.05)。研究表明:海兰褐蛋鸡育成期生长发育的综合性优势与商业高产选育目标高度契合,如皋黄鸡则呈现出适配地方品种肉蛋兼用特性的生长表型。 展开更多
关键词 如皋黄鸡 海兰褐蛋鸡 育成期 生长发育 血液生化指标
原文传递
资源昆虫在家禽饲料中的利用与产业化现状
17
作者 沈海玉 徐倩岚 +1 位作者 窦新红 陆明星 《环境昆虫学报》 北大核心 2026年第1期97-107,共11页
资源昆虫除富含蛋白以及其他的必需营养素外,还富含功能性活性物质,这些物质对动物健康产生积极影响,已发现其中500种昆虫可用于饲料开发。随着人类对动物蛋白需求的不断增加,家禽以其饲料转化率低、生命周期短、土地利用效率高、营养... 资源昆虫除富含蛋白以及其他的必需营养素外,还富含功能性活性物质,这些物质对动物健康产生积极影响,已发现其中500种昆虫可用于饲料开发。随着人类对动物蛋白需求的不断增加,家禽以其饲料转化率低、生命周期短、土地利用效率高、营养丰富等特点得到消费者的认可。但是,为了满足日益增长的需求,家禽业也面临着可持续的饲料来源缺乏的困境。本论文综述发现资源昆虫中主要潜在饲料昆虫都富含蛋白质和比较均衡的氨基酸组成,脂肪酸含量高,不同种类资源昆虫的优势脂肪酸种类有差异,此外它们还具有丰富的抗菌肽、甲壳素、矿物质元素等。进一步阐明主要潜在饲料昆虫添加到家禽饲料中可以改善家禽生长性能、肉类品质、蛋类品质,提高家禽的免疫能力等。最后,总结了资源昆虫在家禽产业中的利用与产业化现状,并展望了利用前景及在整个循环农业中的重要地位。 展开更多
关键词 资源昆虫 家禽 蛋白质 脂肪酸 抗菌肽 功能成分
在线阅读 下载PDF
陆相湖盆不同岩相页岩储层特征及孔缝发育差异性机理——以苏北盆地高邮凹陷古近系阜宁组二段为例
18
作者 刘启东 李鹤永 +6 位作者 段宏亮 杨艳 孙雅雄 杨保良 付茜 邢玉洁 宋丽艳 《石油实验地质》 北大核心 2026年第1期74-88,共15页
苏北盆地高邮凹陷古近系阜宁组二段发育大套厚层湖相富有机质页岩,明确不同富有机质岩相页岩储层结构差异发育机理,对页岩油勘探具有重要理论意义。采用大面积扫描电镜成像(MAPS)、CT扫描与聚焦离子束—扫描电镜(FIB-SEM)等方法,对苏北... 苏北盆地高邮凹陷古近系阜宁组二段发育大套厚层湖相富有机质页岩,明确不同富有机质岩相页岩储层结构差异发育机理,对页岩油勘探具有重要理论意义。采用大面积扫描电镜成像(MAPS)、CT扫描与聚焦离子束—扫描电镜(FIB-SEM)等方法,对苏北盆地阜宁组二段不同岩相页岩的孔缝结构特征进行分析。发现苏北盆地阜宁组二段主要发育灰云页岩、长英质—灰云质混积页岩、长英质—黏土质混积页岩三种优质岩相页岩,矿物组成和沉积结构均具有显著差异性。总体上,孔缝类型可划分为有机质孔缝、粒间孔、溶蚀孔(碳酸盐矿物和钾长石)和无机缝。研究结果表明,矿物组成和结构特征是影响苏北盆地阜二段三种优质岩相页岩孔缝结构发育的主控因素;碳酸盐矿物溶蚀孔和无机缝在灰云页岩中的占比最高,长英质粒间孔和无机缝在长英质—灰云质混积页岩中占比最高,长英质粒间孔和黏土矿物无机缝在长英质—黏土质混积页岩中占比最高;受成岩作用的影响,灰云页岩中碳酸盐矿物(方解石、白云石)溶蚀孔孔径和成孔效率较长英质—黏土质混积页岩更高。此外,研究区纹层状页岩中主要发育长英质纹层、碳酸盐矿物纹层和黏土质纹层等纹层类型,其面孔率依次降低。由于纹层状页岩促进了大量水平纹层缝的发育,为有机酸的运移提供了更优的通道,使得其较层状/块状页岩具有更高的溶蚀孔孔径和成孔效率。 展开更多
关键词 湖相页岩 孔隙结构 微裂缝 发育机理 阜二段 高邮凹陷 苏北盆地
在线阅读 下载PDF
苏北盆地高邮凹陷侵入岩发育模式及其对页岩油勘探的影响
19
作者 李维 于雯泉 +4 位作者 段宏亮 周进峰 杨艳 卢显荣 姜传芳 《石油实验地质》 北大核心 2026年第1期174-189,共16页
以苏北盆地高邮凹陷北斜坡中部沙埝—花庄地区古近系广泛发育的辉绿岩为研究对象,在岩心观察与实验分析的基础上,对比测井曲线及地震响应特征,结合花庄地区古近系阜宁组二段(阜二段)页岩油勘探实践,系统分析侵入岩发育模式,并探讨其对... 以苏北盆地高邮凹陷北斜坡中部沙埝—花庄地区古近系广泛发育的辉绿岩为研究对象,在岩心观察与实验分析的基础上,对比测井曲线及地震响应特征,结合花庄地区古近系阜宁组二段(阜二段)页岩油勘探实践,系统分析侵入岩发育模式,并探讨其对页岩油富集成藏的影响。结果表明:①高邮凹陷古近纪发育多期岩浆侵位,其中大规模的岩浆活动主要发生于始新世强烈伸展背景下。②岩浆主要以岩墙形式,在深凹带与斜坡带之间的薄弱区上涌进入盆地,随后部分在阜宁组薄弱层内横向扩展,多期叠置形成大型连片岩床;部分进一步向上侵入至吴堡运动不整合面附近及其上方古近系戴南组—三垛组,形成多个规模较小的朵叶状岩床,共同构成“直立岩墙—多级岩床—多期侵位”发育模式。③岩浆主要活动期与阜二段生烃期一致,岩浆侵位对富有机质页岩成烃演化、储集空间发育和页岩油保存产生复杂影响。④侵入岩可显著提升所穿插页岩的成熟度,并使周围约10~15 m范围内的页岩孔隙度普遍增加5%以上,二者共同降低页岩油可动用下限。⑤局限于阜二段内部的低角度岩床对页岩油保存条件影响较小;切穿阜二段的倾斜岩床以及与浅部岩床伴生的大规模岩墙会破坏页岩油富集;宽度10 m以内的小规模独立岩墙对页岩油成藏未造成明显破坏,但压裂改造时会诱导裂缝沿岩墙远距离延展。 展开更多
关键词 侵入岩 页岩油 阜宁组 古近系 高邮凹陷 苏北盆地
在线阅读 下载PDF
饮食文化景观的生产机制及意义建构
20
作者 侯兵 牛佳宁 +1 位作者 马健鹰 余凤龙 《旅游学刊》 北大核心 2026年第1期113-125,共13页
景观生产是刻画地方文化变迁的重要视角,饮食文化既有物质表现形式,也是不同时空背景下社会关系和社会风情的映射,饮食文化生产具备了景观生产的典型特征。在推动中华优秀传统文化创造性转化和创新性发展的时代背景下,亟须关注饮食文化... 景观生产是刻画地方文化变迁的重要视角,饮食文化既有物质表现形式,也是不同时空背景下社会关系和社会风情的映射,饮食文化生产具备了景观生产的典型特征。在推动中华优秀传统文化创造性转化和创新性发展的时代背景下,亟须关注饮食文化景观生产的过程、机制和意义,借此观照传统文化保护、传承、利用的方向和路径。文章基于文化地理学的理论视角,以扬州炒饭为例,运用史料和文献分析、问卷调查和访谈等方法,剖析扬州炒饭文化景观生产的过程及影响。研究发现:1)作为文化景观的扬州炒饭,其演化脉络涵盖了民间演绎下的史料源头、“炒”技术条件的形成、“炒饭”作为食物现象的多重社会功能和现当代扬州炒饭的出现及其实践等过程和维度,景观形象呈现出由抽象到具象的转变;2)扬州炒饭文化景观生产机制,具有构成要素上的自然基底、具象质料和非具象质料,并形成了由文献史料和文学作品的建构、商业化经营行为的扩散、专业院校人才培养的推动、研制炒饭制作标准的规范以及政府对其作为非遗项目的认定等五重动力,基于要素支持和动力作用,构成了由意象形态、物理形态至社会形态的文化意象生成机制、物态结构调节机制和社会形象塑造机制;3)扬州炒饭文化景观的意义建构,是在不同时期、不同场景下多个权力主体交织其中和共同作用下形成的,体现了文化生产中地方性和全球化的有机统一。扬州炒饭具有多元化的场景表达,不同属性的“真实性”在不同场景下和谐共生。扬州炒饭文化景观在生产中不断延伸出新的寓意,已经成为一种价值观的象征与表达。 展开更多
关键词 饮食文化景观 生产机制 意义建构 扬州炒饭
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部