Results 31 to 40 of about 1,294,127 (166)
野生动物学报, 1992 确定食物选择性不仅是估计动物生境营养容纳量和进行生境评价及改良等种群管理学问题的基础,它也将为生境选择、建立最优取食模型和探讨种间关系等许多生态学方面的问题提供有价值的信息,因此成为食性研究中一项主要的工作。在国外,食物选择性（food selectivity）这一术语在食性研究中通常与食物偏爱性（food preference）相混淆,在食性文献中常为后者所代替。在国内,食物选择性的确定仅在最近的有蹄类食性研究中得到重视（陈化鹏等1989）,并且在已往的食性研究中,主要食物（Principal ...
陈化鹏, 马建章, 高晓芳
doaj
The Making of the Right to Food: Tracing Food Policy Conflict and Negotiated Outcomes in Colombia
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT The 2016 Peace Agreement between the Colombian Government and the FARC guerrilla group marked a historic step toward ending more than five decades of armed conflict. It also reshaped national food policy with lasting implications. During the negotiations, deep ideological divisions emerged between food sovereignty and food security, and these ...
Felipe Roa‐Clavijo
wiley +1 more source
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
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Zhongguo shiyan zhenduanxue, 2011 目的提高对于原发性食管恶性黑色素瘤影像的认识。方法回顾性分析4例经手术病理证实的原发性食管恶性黑色素瘤患者的X线及CT影像资料,并复习相关国内外文献。结果 4例患者术前均行上部胃肠道口服钡餐造影及多层螺旋CT检查。肿瘤均为单发,2例肿瘤位于食管下段,2例位于食管中下段。病变均突向腔内,2例呈结节样,2例为不规则肿块。4例中1例螺旋CT证实有食管旁淋巴结增大。4例中1例术前考虑为原发性食管恶性黑色素瘤,3例考虑为食管癌。结论原发性食管恶性黑色素影像表现缺乏特异性,当食管中下段发现肿瘤且梗阻不明显时 ...
刘岳峰 +4 more
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World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Prevailing levels of hunger, malnutrition, and food insecurity—driven by conflict, global economic crises, and ecological destruction—are threatening fulfillment of the right to adequate food. The integration of human rights in food systems policies can address these challenges; however, progress in the adoption of human rights–based ...
Ellen Johnson +4 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Developing rapid, precise gas sensors for Listeria monocytogenes (LM) biomarker detection faces challenges due to suboptimal gas‐solid interactions. Herein, we report the rational synthesis of amino‐functionalized mesoporous SiO2 hollow nano‐doughnuts (MS‐2‐NH2‐2) via modification with (3‐aminopropyl) trimethoxysilane (AAPTMS), which enables ...
Xingyu Wang +7 more
wiley +1 more source
Psychometric framework for coexistence with large carnivores
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source
食管黏膜脱落细胞DNA倍体联合血清标志物检测在食管癌诊断中的价值
Zhongguo shiyan zhenduanxue, 2016 目的探讨血清肿瘤标志物神经元特异性烯醇化酶（NSE）、癌胚抗原（CEA）联合食管黏膜脱落细胞DNA倍体在食管癌诊断中的应用价值。方法选取我院收治的经胃镜诊断为食管病变患者128例,其中64为食管癌患者,64例为食管良性病变患者,使用罗氏电化学发光免疫系统检测其血清NSE、CEA水平,采用ICM检测DNA倍体水平,分析其特异性及敏感性。结果 64例食管癌患者中有45例DNA倍体为阳性,64例食管良性病变患者中,3例DNA倍体异常,食管癌组患者的NSE、CEA水平均明显高于良性病变组,组间比较有明显差异 ...
李德生 +4 more
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野生动物学报, 2023 为了对比分析冬季和春季狍（Capreolus pygargus）取食营养策略及其影响因素，2020年11月—2021年5月，在吉林珲春东北虎国家级自然保护区进行野外调查和样本采集等工作，共收集狍粪便38份，其中冬季26份，春季12份；植物样本953份，其中冬季542份，春季411份。通过分析狍食性，测定可食植物宏营养和微营养含量，以及定量环境中食物获得性和可食植物的营养含量，对比分析冬春季狍的食物组成和营养策略。结果表明：冬春季狍食物组成和食物可获得性存在差异 ...
齐琦, 包衡, 姜广顺
doaj
Predictive evolutionary genomics: principles, validation, and practice
New Phytologist, Volume 252, Issue 1, Page 36-48, October 2026.Summary Climate change and habitat loss are driving rapid evolutionary responses in populations world‐wide, which creates an urgent need for evolutionary forecasting in conservation and agriculture. Such forecasting can be categorized into three time scales: trait‐based models that use multivariate quantitative genetic equations to project correlated ...
Daniel Ortiz‐Barrientos +5 more
wiley +1 more source