Results 31 to 40 of about 21,869 (158)
Shuitu Baochi Xuebao, 2003 借鉴国内外研究基础,探讨了区域可持续土地利用管理评价指标设计的结构和原则,并且以农用土地为侧重点,系统提出区域可持续土地利用管理评价的指标体系框架.该框架以整个区域农用土地为对象,以土地质量指标为主体,构建了5个方面的评价标准,即土地质量维持或提高、土地资源的供应与当前及未来需求目标的平衡、非再生资源合理使用、土地资源的非生产功能得到兼顾、良好的社会政策环境支持.并分别建议了评价指标.
齐伟, 张凤荣, 东野光亮
doaj +2 more sources
Taxonomy, distribution and comparative study of thermal tolerance in Nipponacmea limpets along China coast [PDF]
, 2015 作为生物圈最脆弱的系统之一，潮间带生态系统是研究全球变化对群落动态影响的理想系统。全球变化带来的环境变化如温度升高、海水酸化和海平面升高等可影响生物行为、生理以及进化适应，从而改变潮间带生物的种群动态和群落结构。而面对环境变化，物种间由于适应能力的差异，会出现“胜利者”和“失败者”。背尖贝（GenusNipponacmea）是常见潮间带生物，广泛分布于我国沿海中-高潮间带岩石上。本研究利用DNA条形码研究中国沿岸背尖贝的分类、系统发育以及地理分布格局，并测定不同温度下背尖贝属间生理和分子适应的差异 ...
于姗姗
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How Do I Measure up? Social Influence and L2 Motivation in the Algorithmic Age
International Journal of Applied Linguistics, EarlyView.ABSTRACT Comparative thinking is a fundamental human drive and a hallmark of contemporary life. For social action, such as the learning and use of additional languages, a target for appraisal (an L2 attribute) is evaluated in relation to a comparison standard (an appraiser's standpoint).
Alastair Henry, Meng Liu
wiley +1 more source
, 1992 研究了低pH(6.0—3.6)对草鱼呼吸活动机能及耗氧代谢的影响.结果表明,在pH4.6—3.6条件下,草鱼呼吸和气体代谢活动受干扰的程度随酸度增大而急剧加重.其具体表现为:呼吸率加快,咳嗽反应增加,呼吸深度加大.耗氧率起始升高继而迅速下降,并在极端pH(3.6)下最终引起机体组织缺氧而致死.对于pH5.6,草鱼各类呼吸与代谢指标未受明显影响,基本属于正常.供试草鱼对低pH反应的灵敏程度依次为:咳嗽率>呼吸率>耗氧率> ...
余日清,贺锡勤
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Learning Styles, Engagement and Anxiety in AI‐Mediated Writing: A Multimodal Feedback Study
International Journal of Applied Linguistics, EarlyView.ABSTRACT Artificial intelligence (AI) tools now permeate English academic writing. However, evidence on how feedback modalities align with student differences and with psychological mechanisms remains limited. Prior work often reduced learning styles to simple matches with delivery modes and treated learning engagement and writing anxiety as peripheral.
Yi Ren +3 more
wiley +1 more source
野生动物学报, 1991 猕猴在解剖、生理、生化各方面与人类最为相似,其实验结果易外推于人,是替代人体最理想的实验动物。福建山区辽阔,野生猕猴资源丰富,为了更好地利用猕猴作为人类疾病的实验动物模型,进一步了解正常野生猕猴各项生理生化指标,我们特对捕自福建的猕猴进行肝功能指标测定,旨在建立一套福建野生猕猴正常肝功能指标,以保证实验的准确性。
周斌华 +5 more
doaj
Physiological and Proteomic Analyses in Responses of Mangrove Plant Kandelia obovata Seedling Leaves to Submergence Stress [PDF]
, 2016 水淹是限制多数植物生长和发育的重要限制因子。红树植物是生活在滨海湿地的一类对水淹具有较高耐性的木本植物。近年来，在对红树林湿地的围垦和鱼塘养殖的开发过程中经常会造成对红树植物的严重水淹，甚至是长时间、整株植物的被淹（特别是对幼苗）。然而，红树植物对这种长时间、全淹胁迫的响应仍有待研究。在本研究中，基于蛋白质组学技术，我们采用红树植物秋茄（Kandeliaobovata）幼苗为实验材料，来探究红树植物秋茄耐受长时间、全淹胁迫的生理响应和分子机制。主要研究结果如下: （1）秋茄幼苗持续全淹处理 ...
李赞
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Effects of three kinds of growth regulators on flowering and branch physiological characteristics of Paeonia rockii [PDF]
[Objective] The study aims to explore the effects of three kinds of growth regulators on the flowering and branch physiological characteristics of Paeonia rockii and to provide theoretical basis for the chemical regulation of flowering traits of P ...
LIU Jiamiao +4 more
core +1 more source
Journal of Sociolinguistics, EarlyView.ABSTRACT This study adopts a transnational raciolinguistic perspective to examine how Chinese international students (CISs) navigate language, race, and identity across borders and contexts. Based on semistructured interviews with 14 CISs, the study highlights that pre‐migration socialization in China influences how CISs perceive and interpret their ...
Gengqi Xiao, Hailing Wang, Jing Yu
wiley +1 more source
The Key Process of Colonization and Spread of Sonneratia apetala introduced in the Local Mangrove Wetland [PDF]
, 2016 无瓣海桑(Sonneratiaapetala)于20世纪80年代引入中国后，由于其具备速生性、抗逆性等生理特点，被广泛种植于中国华南沿海地区，随着种植面积的增大，人们对于无瓣海桑的入侵潜力产生了担忧。本研究选择雷州湾北家村红树林保护区为主要研究区域，通过野外调查、野外种植、室内对照的方式研究了无瓣海桑的果实凋落、果实漂浮、土壤种子库分布、林窗内无瓣海桑的定植、光胁迫下的生理响应，为无瓣海桑防治积累了科学的理论依据。本研究结果如下： 无瓣海桑的果实一年内有两次成熟期，秋季为无瓣海桑成熟的主要季节 ...
刘凡
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