Results 121 to 130 of about 203,533 (183)
[An investigation study on the technology and training level of ski patrol]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanBai P +7 more
europepmc +1 more source
, 2001 VA真菌能和绝大部份栽培及野生植物共生，改良植物营养状况，促进生长，增强植物抗旱，抗病能力起着其它微生物不能替代的重要作用，是一类不亚于生物固氮的有益微生物。但至今研究甚少，距实际应用尚远。该项研究以新疆，北京，吉林三地为代表，进行中国北方的真菌资源调查及生态研究，取得如下成果：(1)完成了迄今国内外规模最大的结合生态研究进行的种的水平资源调查。(2)首次较系统地研究了VA真菌种的生态分布规律，明确了某些种在这些地区分布的地域性。(3)进行了资源利用的初步探讨 ...
王幼珊 +4 more
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[Cross-century process of mental health surveys in China]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanHuang J, Liu Z, Zhang T, Huang Y.
europepmc +1 more source
Audit to assess the quality of 916 prosthetic prescriptions of removable partial dentures. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Zhang N +9 more
europepmc +1 more source
, 2005 雪豹(Unciauncia)属于中亚高山高度濒危动物,夜行性,极其罕见。新疆雪豹研究小组2004年9~11月,在新疆的北塔山、阿尔泰山东部、天山东部和托木尔峰地区大约9个地点,对雪豹的痕迹进行了全面调查。共计完成67个样线,总长度47776m,其中发现遗留痕迹的样线有27条,痕迹数118个,平均为2.47个/km。记录到的痕迹有粪团、嗅痕(气味标记)、足迹、刨痕、卧迹、爪印、毛发、尿迹、血迹、剩余食物(动物尸体)和吼声等。同步还完成了200余份问卷调查表,充分了解雪豹与当地居民的冲突。最后 ...
马鸣,Bariushaa Munkhtsog,徐峰,买尔旦,殷守敬,魏顺德
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[A population-based survey of myopia on primary school students in an administrative district, 2019 to 2024]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanYang M +8 more
europepmc +1 more source
, 1985 <正> 一、调查的必要性水生维管束植物(以下简称水草)是水库水生态系统的组成部分,也是水库的重要资源之一。影响水生植被在水库形成的因素较多,如库水深度、防浪程度、地理位置、水位状况、淹没地区的特征 ...
方绪艮 +3 more
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[Clinic behavior and therapeutic status of patients with antiphospholipid syndrome]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanLi Y, Liu X, Li G, Li C, Jia Y.
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[Clinical characteristics of neonates infected with the Omicron variant of SARS-CoV-2: a multicenter cross-sectional survey]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Shenzhen Neonatal Data Network.
europepmc +1 more source
[Investigation of Factors Influencing the Quality of Life in Patients With Chemotherapy-Induced Peripheral Neuropathy and Construction of a Prediction Model]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanHong H, Mo L, Sun Y, Wu F.
europepmc +1 more source