Results 51 to 60 of about 1,279,856 (124)
, 1998 报道了中国６个典型地带土壤原生动物的食性观察结果，并就观察结果进行了讨论和分析。根据食性或营养方式，将鉴定到的２９０种土壤原生动物分为８个功能营养类群———自养者、食细菌者、肉食者、食碎屑者、食真菌者、植食者、杂食者和腐生性营养者 ...
宁应之,沈韫芬
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World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Globally, there is collective agreement on the need to advance equity within food systems to promote health equity, food security, and social justice through structural transformation. Food systems are shaped by power asymmetries across scales and actors, which influence the realization of the right to food and constrain the agency of ...
Joan Kaburia, Susan J. Elliott
wiley +1 more source
, 2008 粮食问题是人类面临的全球性问题之一,世界各国都认识到粮食问题是关系本世纪全球的安全性问题。为此,1996年11月在罗马召开联合国粮食高峰会议。我国人口占世界的22%,我国的粮食问题不仅是自身的安全性问题 ...
彭珂珊
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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
Zhongguo shiyan zhenduanxue, 2004 目的 通过研究食管癌的HPV16感染阳性率及抑癌基因P16、P5203表达的影响20,探讨HPV16感染在食管癌病因学的作用。方法 取食管癌手术切除标本2030例及内镜下取慢性食管炎并非典型增生标本和正常食管黏膜标本各2030例20,应用PCR方法检测各标本HPV16的感染阳性率20,并用免疫组织化学方法分别检测各组中的P5203和P16基因突变率。结果 食管癌组HPV16感染阳性率20420620206207%显著高于癌前病变组2022032033%和正常组2032033%20 ...
陈捷, 周宇, 李杰, 吴平
doaj
, 2003 在保安湖一围栏区 ( 3.3hm2 )周年采样 ,共获得可供食性分析用的二龄河蟹 36 2只 (壳宽 1.99— 6 .2 4cm)。胃含物分析表明 ,河蟹为杂食性 ,兼具肉食性倾向 ,以底层群落为食 ,食谱极为复杂 ,包括水生大型植物、藻类 ( 47个属 )、原生动物、轮虫、节肢动物、环节动物、软体动物、鱼类和颗粒碎屑 ,各大类食物的出现频率分别为 87.3%、82 %、0 .3%、0 .6 %、48.2 %、2 8.2 %、0 .3%、2 8.7%、88.7 ...
金刚,谢平,李钟杰
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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
Zhongguo shiyan zhenduanxue, 2014 原发性食管恶性黑色素瘤好发于老年患者,是一种非常罕见的食管恶性肿瘤,其发病率约占食管原发恶性肿瘤的0.1%-0.2%[1],发病隐匿,多于晚期发现。近年,随着此病的早期诊治,其预后较前有所提高。本文报道1例罕见的老年原发性食管恶性黑色素瘤,并结合国内外最新的相关文献报道分析其临床及病理特点,以提高人们对此病的认识及诊疗水平。1临床资料患者老年男性,74岁,因进食梗噎感 ...
薛锦儒 +5 more
doaj
, 2008 2006年9月在新疆卡拉麦里山有蹄类野生动物保护区内采集了25堆蒙古野驴粪便和10科共29种植物标本,采用粪便显微组织学分析方法分析了蒙古野驴的秋季食性,并初步探讨了其食性与周围环境的关系。结果表明,蒙古野驴秋季食性广,共采食8科26种植物。这些植物按照其在食物组成中的比例可分为3大类:主要食物为梭梭、针茅、驼绒藜,共占食物组成的61.3%;常采食植物为柽柳、角果藜、蒿、琵琶柴、芨芨草等11种,共占食物组成的33.3%;少见采食的植物为盐爪爪、獐毛、顶羽菊、黑果枸杞、里海盐爪爪等12种,共占食物组成的6.
徐文轩, 杨维康, 刘伟
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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