Results 31 to 40 of about 928,708 (158)

应用磁球凝固法建立适合未成年人凝血常规指标参考区间的探讨

open access: yesZhongguo shiyan zhenduanxue, 2012
凝血常规检测是反应内源性与外源性凝血途径障碍的主要筛选试验,是临床出血和血栓性疾病常用的检验项目,主要包括PT、APTT、Fib、TT,但由于市场上血凝仪使用品牌众多,各厂家检测原理也不尽相同,所用参考区间多针对于成年人,而对适合未成年人的参考区间的探讨鲜有研究,本文旨在通过回顾性分析探讨应用磁球凝固法建立适合未成年人凝血常规检测的参考区间。
孙涛, 艾清, 袁宝山, 邱俊
doaj  

Microstructure Engineering Toward High Cost‐Effective Nd–Fe–B Sintered Magnets: A Review

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Nd–Fe–B sintered magnets, critical for enhancing electromechanical conversion efficiency and operational stability in wind turbines and electric vehicle drives, are prized for their outstanding coercivity, high remanence, and superior maximum energy product.
Dongmin Zhang   +5 more
wiley   +1 more source

mPCNL术后尿源性脓毒血症风险因素分析及基于诺模图的预测模型建立

open access: yesZhongguo shiyan zhenduanxue, 2023
目的 探讨微通道经皮肾镜碎石术(mPCNL)后发生尿源性脓毒血症的相关独立风险因素,并建立其风险预测模型。方法 选取我院泌尿外科2020年1月至2021年12月期间,因上尿路结石行mPCNL治疗的122例患者的临床资料,进行回顾性分析。通过采用单因素及多因素Logistic回归分析围手术期指标与mPCNL术后尿源性脓毒血症的关系,筛选出独立危险因素,并由此建立尿源性脓毒血症的Logistic回归预测模型,计算OR值并构建诺模图。进行数据可视化处理,并采用Hosmer ...
谈吉超   +4 more
doaj  

Flexible parental care in a songbird correlates with sex‐specific responses to seasonal phenology, mating opportunity and reproductive success

open access: yesJournal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.
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
wiley   +1 more source

Anthropogenic nitrogen addition interrupts seasonal connectivity and structures of plant–pollinator networks

open access: yesFunctional Ecology, Volume 40, Issue 6, Page 1878-1891, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao   +8 more
wiley   +1 more source

Guanidinium‐Based Covalent Organic Frameworks via Pore Wall Regulation: Efficient Selective Palladium Recovery From Metallurgical Wastewater

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Recovering palladium (Pd) from low‐concentration metallurgical wastewater still poses significant challenges. In this study, triaminoguanidine hydrochloride was used as the key functional site, and three guanidine‐functionalized covalent organic frameworks (GCOFs) were successfully constructed by adjusting the substituents (–H, –OH, and –OCH3)
Jiaxing Xiong   +9 more
wiley   +1 more source

人DNA指纹检测的初步研究(科研简讯)

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1988
1985年,Jeffreys等首次报道用人肌红蛋白基因内含子中一个33bp的重复序列片段探针揭露出人小卫星DNA片段的高度多态性,并称之为DNA“指纹”。此后,若干学者对此进行了研究,并己逐渐应用于法医学亲权鉴定和个体识别的案件,取得了可喜的进展。 目前,国内人基因组DNA重复序列克隆还不易获得,用人工合成还较昂贵。我们根据随机探针检测DNA限制性片段长度多态性时,对探针的选择不在于它的来源或它原来的功能,重要的是能检测出多态性的原则,以及鼠与人的髓鞘碱性蛋白(MBP)基因cDNA有90 ...
罗超权
doaj  

Internal physiological drivers of leaf development in trees: Understanding the relationship between non‐structural carbohydrates and leaf phenology

open access: yesFunctional Ecology, Volume 40, Issue 5, Page 1151-1164, May 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo   +8 more
wiley   +1 more source

Multi‐Dimensional Characterization of Sodium‐Ion Battery Materials: Bridging Atomic Structure, Interface Chemistry and Electrochemical Performance

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Sodium‐ion batteries (SIBs) have emerged as promising candidates for large‐scale energy storage due to their cost‐effectiveness and resource abundance. However, challenges such as sluggish ion diffusion kinetics, structural degradation, and interfacial instability hinder their practical applications.
Yunze Wang   +7 more
wiley   +1 more source

长计数器的效率刻度及其应用

open access: yes四川大学学报. 自然科学版, 2015
为了准确测定241 Am-Be中子源的强度,研制了一套长计数器测量系统,并利用四川大学2.5MV质子静电加速器产生的单能中子在多个中子能点对其探测效率进行刻度,在刻度过程中中子注量由金活化法确定,并采用挡锥法扣除大厅散射中子本底的贡献.结果表明我们研制的长计数器在所刻度的中子能区范围内具有很好的坪特性.用该长计数器测量系统测得241 Am-Be源的强度为7.188×105/s,不确定度为3.5%.
朱祚缤, 华艳, 陈伟, 罗小兵
doaj  

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