Results 71 to 80 of about 70,029 (253)
野生动物学报, 2020 性别鉴定对鸟类种群动态、群落结构、栖息地利用以及行为研究都具有重要作用。除了自然选择与性选择，亲缘关系被认为与是否存在性二态有关。白头鹎（Pycnonotus sinensis）与领雀嘴鹎（Spizixos semitorques）隶属于鹎科（Pycnonotidae）不同属，是探讨亲缘关系与性二态差异之间相关性的适宜对象，二者在野外都难以从形态区分性别。本研究以分子为基础，对比同域分布的白头鹎和领雀嘴鹎雌雄个体间在形态上是否存在显著差异。结果表明白头鹎指名亚种在枕部白色斑块面积和尾羽具明显的性二态 ...
曾煜 1 李贺 2 逯金瑶 3 向晨旭 1 李翔 1 付昌健 1 李立 3 邢晓莹 1
doaj
The AMP-mimetic AICAR prevents HFD-promoted hepatosteatosis and inhibits liver tumorigenesis [PDF]
, 2015 肝细胞癌（Hepatocellularcarcinoma）是最常见的肝脏原位肿瘤。肝癌的 危险因素包括酒精性肝疾病、非酒精性肝炎、肝炎病毒感染等。这些因素都和肝 癌形成中炎症有重要关系。肥胖人群中，肝脏脂质积累造成的非酒精性脂肪肝炎， 肥胖已成为肝癌形成的潜在危险因素。流行病学研究表明，超重和肥胖增加了癌 症发生的风险。在升高体重指数超标的肝癌患者中，由于肝癌死亡的风险是正常 人的4.5倍。文献报道，肥胖通过增加白介素6和肿瘤坏死因子的表达促进肝脏 炎性过程 ...
高建龙
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Rare Metals, EarlyView.ABSTRACT The development of high‐efficiency, stable, and scalable perovskite solar cells/perovskite solar modules (PSCs/PSMs) highly depends on the performance and cost‐effectiveness of functional layers such as electron transport layers (ETLs) and hole transport layers (HTLs).
Baochang Wang +11 more
wiley +1 more source
红细胞参数及计算公式对缺铁性贫血与地中海贫血鉴别诊断效能比较
Zhongguo shiyan zhenduanxue, 2018 目的比较8种红细胞参数及计算公式对缺铁性贫血与地中海贫血鉴别诊断的实际效能。方法用全自动血球仪对本院产检接收的110例缺铁性贫血和211例地中海贫血患者的红细胞参数进行检测,以文献报导的8种红细胞参数及计算公式(依次标记为F1-F8)为鉴别指标,分析它们的灵敏度、特异度、阳性预测值、阴性预测值、约登指数、阳性似然比、阴性似然比、对应的ROC曲线以及曲线下面积(AUC)。结果发现公式F7、F8和F5的鉴别效能明显高于其余5个公式,3个公式的AUC分别为0.978、0.953and 0.925 ...
贺海林 +6 more
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The Influence of CEO’s Characteristics on Accounting Conservatism：Evidence from Chinese Listed Company [PDF]
, 2016 作为会计核算的重要原则之一，会计稳健性对提高企业会计信息质量及减少企业代理成本的作用不可忽视。董事长不直接管理公司，CFO是CEO意见的执行者，CEO作为公司管理团队的核心，实际控制着公司，对公司的影响力广泛而重大。因此，探讨CEO如何影响公司的会计稳健性意义重大。 本文从我国2010-2014年的沪深A股上市公司出发，采用Ball和Shivakumar（2005）的模型研究我国上市公司CEO个人特征（年龄、性别、学历、专业、持股比例、两职兼任情况）如何影响上市公司的会计稳健性。此外 ...
吴小平
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Rare Metals, EarlyView.ABSTRACT Photocatalytic hydrogen production from water splitting is a promising strategy for sustainable and clean energy generation. However, the design of low‐cost, highly active photocatalysts remains a critical challenge. In this study, covalent organic frameworks (COFs) were loaded onto the surface of Cd0.9Cu0.1S to fabricate COF/Cd0.9Cu0.1S ...
Yue Zhao +3 more
wiley +1 more source
A study on the adpatability design strategy of eco-architecture(生态建筑的适应性设计问题研究)
Zhejiang Daxue xuebao. Lixue ban, 2011 适应性是当代生态建筑区别于现代主义建筑机器属性的基本特征.分别从地域适应性、功能适应性、经济适应性以及文化适应性等多方面，系统地论述了生态建筑的适应性设计策略的相关问题.
WANGXin(王鑫), ZHENGWei(郑卫)
doaj +1 more source
Disease burden based on gender and age and risk factors for stroke in China, 2019. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Guo Y, Jiang J, Cao F, Yan J.
europepmc +1 more source
Correlations between IGF-IR Expression and Clinicopathological Factors and Prognosis in Patients with Lung Adenocarcinoma [PDF]
, 2010 Background and objective The incidence of lung adenocarcinoma increases rapidly, and IGF-IR is the key mediator of several growth factors signal transduction, therefore it plays an important role in the proliferation and differentiation of cancer cell ...
Baohui HAN +4 more
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Wildlife Letters, EarlyView.Eimeria saudiensis represents a genus of apicomplexan parasites capable of inducing coccidiosis in Arabian oryx. Our research concentrated on the morphological and molecular investigation of Eimeria spp. in the captive oryx herd in Oman. The therapeutic and management practices employed at the Mammals Breeding Center were reassessed to diminish ...
Khalid Al‐Habsi +7 more
wiley +1 more source