Results 31 to 40 of about 15,154 (186)
Zhejiang Daxue xuebao. Lixue ban, 2003 微黄镰玉螺的消化系统由消化道和消化腺两部分组成:消化道包括口、食道、胃、肠及直肠;消化腺包括食道腺、肝胰腺和肛门腺,无唾液腺.在光学显微镜下,消化道由粘膜层、粘膜下层、肌层和外膜4层结构构成.描述了消化道及消化腺的结构特征,并利用组织化学方法测定了消化腺细胞中的蛋白质和酶类,对各消化腺的功能作了初步分析.
YINGXue-ping(应雪萍) +3 more
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Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou +8 more
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Shuitu Baochi Xuebao, 2016 为保证桑树在三峡库区困难立地条件下的正常生长，对该区砾石土、粗骨土、砾质土和扰动土4种生境土壤结构稳定性与持水性能进行诊断，并探讨了各种生境障碍因素的改良途径。结果表明：（1）不同生境土壤物理性质差异显著（p＜0.05），土壤容重表现为粗骨土生境(1.30 g/cm3)＞砾石土生境(1.23 g/cm3)＞砾质土生境(1.12 g/cm3)＞扰动土生境(1.08 g/cm3)，砂粒含量为粗骨土生境＞砾石土生境＞砾质土生境＞扰动土生境。（2）不同生境土壤抵御季节性干旱能力差异较大，总库容表现为砾石土生境 ...
于亚莉, 史东梅, 蒋, 丁文斌
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Journal of Animal Ecology, EarlyView.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
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Guangxi Zhiwu水韭属是一类具有异形孢子的古老石松类植物，全属物种均被列入国家重点保护野生植物。该文报道了在浙江省长兴县新发现的一个四倍体水韭属居群。基于形态学、孢粉学和细胞学证据，将该物种命名为长兴水韭（Isoëtes changxingensis），并详细描述了其形态特征。长兴水韭与保东水韭（I. baodongii）在植株形态及孢子纹饰方面都较为相似，不同之处在于其染色体为44条，大孢子极面直径为317~411 μm（平均为360 μm）（vs.染色体22条，大孢子极面直径为390~510 μm，平均为450 ...
童 玲 +7 more
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Looking at Us Through Their Eyes. The Analytical Process from Ethnographic Perspectives1
Journal of Analytical Psychology, EarlyView.Abstract This article looks at the analytical situation through the Others’ eyes—through examples from contemporary ethnographies of foreign cultures. It discusses the following issues: a) The analogy between the ontological worlds of the dead, ghosts, animals and dreams in “primitive populations” and the analytical psychological descriptions of the ...
Stefano Carta
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Inferring alternative ecosystem states with field survey data
Methods in Ecology and Evolution, EarlyView.Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen +10 more
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Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
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Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
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Jingshui jishu【目的】目前，我国已经形成了深度脱水-填埋、好氧发酵-土地利用、厌氧消化-土地利用、干化焚烧-建材利用这4条主流的市政污泥处理处置工艺路线，每种工艺路线都有各自的优缺点和适用条件，但每种路线的碳排放水平尚不明确，致使碳排放难以作为工艺比选测算指标落地应用。【方法】根据联合国政府间气候变化专门委员会指南，采用排放因子法，在确定核算边界后，全面核算了污泥从污水处理厂外运直至最终消纳的全流程碳排放量，包括处理处置过程中因甲烷(CH 4)和一氧化二氮(N 2O ...
Qiao WANG +5 more
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