Results 61 to 70 of about 32,480 (207)

中华绒螯蟹铁蛋白基因的克隆及表达分析 [PDF]

open access: yes, 2010
铁蛋白普遍存在于生物体内,具有铁离子解毒和储存等功能。在构建脂多糖刺激的中华绒螯蟹cDNA文库的基础上,获得了中华绒螯蟹铁蛋白基因EsFer的cDNA序列,其全长为1118bp,包含480bp的开放阅读框,推测编码的蛋白质为159氨基酸,其5′和3′端的非编码区分别为178bp和461bp,预测的分子量为18.3ku,理论等电点为5.81,在15~37aa处有一个跨膜螺旋。在5′非编码区核甘酸序列的135~162的位置有个特殊的结构,即铁反应元件(iron response element,IRE ...
付建平   +5 more
core  

Adaptive Chemical Strain Boundary in Freestanding BiSmFe2O6 Double‐Perovskite Membranes

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Double‐perovskite multiferroic systems have attracted increasing attention due to their highly tunable structures and chemical adaptability. The uncontrollable performance changes caused by the release of boundary conditions are an important factor hindering the development of freestanding membranes.
Jie Tu   +14 more
wiley   +1 more source

Shut the Rail: Economic Impacts in Costa Rica [PDF]

open access: yes, 2015
基于哥斯达黎加1995年突发的铁路停运政策,针对哥斯达黎加自1984年到2000年移民模 式的变化,本文进一步讨论了该国铁路基础设施对其移民模式的影响。通过合并代表性的数据库, 并随机抽查国家人口和家庭普查的两个样本。结果显示:铁路设施的出现使个人移民的几率增加 了27.12%;同时也表明:移民还受个人的文化水平,就业以及年龄的影响。此外,还进一步揭 示了铁路系统如何影响移民方向。由此说明了铁路停运政策是该国移民的主要原因。 关This paper estimates the effects of ...
ELIAZAR ANIBAL SUAREZ FALLAS
core  

Lithology modulates soil priming effect via resource limitations and bacterial community structure

open access: yesFunctional Ecology, Volume 40, Issue 1, Page 176-190, January 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The soil priming effect (PE), triggered by root exudate inputs that stimulates microbial activity and drives significant soil carbon (C) losses in terrestrial ecosystems.
Xinyu Hou   +4 more
wiley   +1 more source

亚铁对水平潜流人工湿地污染物去除能力的分层效应影响

open access: yesShuitu Baochi Xuebao, 2019
通过模拟试验,考察并探讨不同浓度亚铁添加对水平潜流人工湿地中氮和COD去除能力的影响以及作用机理。结果表明:添加亚铁有利于水平潜流人工湿地各层中总氮、硝态氮和铵态氮的去除效果,而且添加亚铁浓度为50 mg/L的人工湿地系统优于其他各处理组,但是过高的亚铁添加又限制了氮的去除效果,尤其是对下层铵态氮的去除能力有抑制作用,但是均高于对照组,而且亚铁添加影响了湿地系统这3种无机形态的氮分层效应。亚铁的添加促进试验初期人工湿地对COD的去除能力,在一定程度上影响了各层COD的去除效果。亚铁离子进入人工湿地后 ...
张燕   +7 more
doaj  

A Research on Fuyao Glass Company Production Data Real-time Tracking [PDF]

open access: yes, 2016
中国作为“世界工厂”已是制造大国,但随着人工成本的不断攀升,劳动力成本的优势正在不断削弱。如何提升劳动效率、降低生产成本是各制造企业努力的方向。论文研究的课题来源于福耀玻璃公司生产数据采集的实际问题,针对福耀玻璃公司汽车玻璃生产过程中多品种、易破损、小批量且产品质量要求高的特点,对生产过程中的生产数据采集流程进行了系统的研究。分析生产数据采集模式来改变现有的生产数据采集的滞后性,通过生产数据采集的流程再造,借助云ERP技术、条形码、标签扫描、WIFI传输技术等,将大量生产数量快速有效地输入数据采集系统 ...
王铁汉
core  

A Game‐Theoretic Analysis of Carbon‐Trading Mechanisms: Strategic Interactions Between Government and Liner Shipping Companies in China’s New Western Land–Sea Corridor

open access: yesJournal of Advanced Transportation, Volume 2026, Issue 1, 2026.
The transportation sector is a major contributor to global carbon emissions; however, the high costs of infrastructure and equipment present significant barriers to effective emission reduction. As a market‐based mechanism, carbon trading improves the efficiency of emission reductions and facilitates the integration of the transportation sector into ...
Si Chen   +5 more
wiley   +1 more source

Impact of high-speed railway on real estate and mechanism [PDF]

open access: yes, 2016
近年来,由于我国经济的飞速增长,高速铁路已经成为我国国人出行最为方便的交通工具之一。高速铁路也在民众的生活中扮演着愈来愈重要的角色,而房地产市场也受到高速铁路不可忽略的影响。然而目前,国内外学术界较集中关注城市轨道交通对房价的影响,却鲜少涉及高铁与房地产业间作用机制的研究。因此,本文的写作目的在于丰富和完善这一领域的理论研究,同时也为相关政府机构及房地产从业人员提供参考。 本文分别通过我国36个重要城市及32个中小城市的565个房价年度数据为基础,通过构建面板模型 ...
游梦蕊
core  

Community‐informed and codesigned research to understand the impacts of railways on wildlife

open access: yesConservation Biology, Volume 39, Issue 5, October 2025.
Abstract Trains cause mortalities of several animal species, but the ecological impacts of railways are understudied. Most research on wildlife–train collisions has focused on large mammals, but understanding railway‐specific risks for underrepresented taxa, especially vulnerable species, is important for developing effective mitigation strategies ...
Kyle D. Vincent   +5 more
wiley   +1 more source

铁氧化物对电瓷质量的影响

open access: yesDianci bileiqi, 1989
通常,电瓷制造中采用的原料含有少量的铁的氧化物.和日用瓷生产中对铁质的看法相类似,在电瓷中也将原料中铁的氧化物视为有害的杂质.随原料进入坯料的铁的化合物一般为如下的含铁矿物:黄铁矿、白铁矿、菱铁矿、磁铁矿、赤铁矿、方铁矿、氢氧化铁和黑云母等.自然而然就会产生这样一个问题——上述铁的化合物在电瓷配方中的有害程度如何?一些含铁矿物,例如黑云母,无疑是一种有害杂质,因为它使坯体膨胀 ...
李玉书, 王正平
doaj  

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