Results 71 to 80 of about 490,447 (173)
目的探讨胆总管囊状扩张诊断方面的特点,深入对本病的认识。方法对65例胆总管囊状扩张患者临床表现和超声影像资料的总结分析。结果在65例病例中,腹痛、黄疽、呕吐出现率最高。具有“三联征”的患者比例为20%(未成年组)和40%(成年组)。出现“二联征”患者比例约为1/3。超声表现分为5种类型:A、B二型胆总管扩张程度较轻,占56.9%;C、D二型胆总管扩张程度较重,占43.1%;E型合并肝内胆管囊状扩张,占15.4%;在成年组中,C、D二型的比例较高。C、D二型中,出现黄疸的比例较高 ...
杨松青, 周敏颖, 赵丽荣
doaj
Evaluating the use of taxonomy in the IUCN Red List
Abstract Taxonomy defines the units that conservationists strive to preserve for future generations. However, the discovery of new species and the taxonomic revision of existing species affect conservation efforts. Despite the importance of taxonomy for a species’ conservation, there is currently no overview of how those leading species extinction risk
Stephen T. Garnett +8 more
wiley +1 more source
Assessing and strengthening community‐based coastal governance
Abstract Community‐based coastal governance is essential for biodiversity conservation and sustainable livelihoods, yet many communities continue to face significant challenges in establishing and sustaining effective governance systems. We sought to improve understanding of the current status of community‐based coastal governance across five countries
Mark Andrachuk +21 more
wiley +1 more source
文章首先对团队作业分析的背景做了简要介绍,然后分别阐述了基于团队认知需求、团队行为需求、团队能力需求三方面的团队作业分析研究现状。最后 ...
任婧, 王二平
core +1 more source
水流绕过物体,当物体表面附近压力下降到水的饱和蒸汽压时,那里的水开始汽化,生成许多小汽泡.这些小汽泡随水流运动到下游速度较低、压力较高的区域时,又凝结破灭(闭合).同时,溶解在水中的空气也可能以空泡形式逸出,形成充满空气的气泡.这种由汽泡(或气泡)产生和凝结(或破裂)过程中引起的一系列现象称谓空泡现象(空化)
金哲学
core +2 more sources
有报道高达30%的纵隔占位为囊性肿物,其中40%为支气管源性或食道源性囊肿[1]。纵隔囊肿患者多数无明显症状,仅在体检时发现,但仍有一部分表现为胸痛、气促、发热、咯血、心律失常等症状。如出现上述症状则需及时诊治。现将2例超声支气管镜引导下经支气管针吸活检(EBUSTBNA)诊断纵隔囊肿合并感染的病例报道如下。1临床资料病例1:患者女性,59岁 ...
赵尔为, 谭平, 黄海东
doaj
Modeling seed germination data to meet biodiversity conservation needs in the Mediterranean
Workflow to assess the availability and quality of germination data and assign species' thermal risk in the Mediterranean. (a) Assessment of data availability, including the phylogenetic distribution of the number of records (i.e. available germination data); (b) data quality assessment; and (c) assignment of climate risk categories for species that ...
Diana María Cruz‐Tejada +2 more
wiley +1 more source
Abstract The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a critical measure of global aquatic and terrestrial biodiversity status. It is also the basis for the Red List Index, which tracks extinction risk over time.
Brittany Finucci +10 more
wiley +1 more source
2014年9月,合肥野生动物园发生一起松鼠猴感染乳酸明串珠菌的病例。病猴出现咳嗽,流鼻涕,发热等症状。病程较快,观察到上述症状后即死亡。剖检时发现肺脏瘀血,肠壁有大小均一的黑点。从病死猴的肝脏分离到一株细菌,纯分后发现菌落形态为细小灰白色,表面光滑,呈透镜状,边缘整齐无皱褶。革兰氏染色后镜检发现为革兰氏阳性球菌,经过细菌16S rRNA PCR扩增和测序比对,确诊为乳酸明串珠菌感染。
张志忠 王 瑞 聂 睿 郭 浩 殷冬冬 王桂军
doaj

