Results 51 to 60 of about 52,960 (211)

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

open access: yesConservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando   +54 more
wiley   +1 more source

ブタ タイガイ ジュセイラン ニ カンヨ スル ランカン ユライ ノ ハッセイ ソクシン インシ ニ カンスル ケンキュウ [PDF]

open access: yes, 1997
【緒言】プタの体外受精は,他の哺乳動物の場合と比べて非常に難しく,受精しても“4-cellblockにより胚盤胞期まで発生する割合は極めて低いことが報告されている.そこで,体内の初期発生の場である卵管に着目し,その卵管上皮細胞が分泌する卵管液が体外受精卵の発生に及ぼす影響について検討されてきた.その結果,ブタ卵管液が発生促進効果を持つこと,さらにブタ卵管上皮細胞との共培養がブタ体外受精卵の発生を促進する効果を有することが明らかになった.そこで本研究では,卵管上皮細胞培養上清が発生促進効果を示すかどうか ...
吉川 奈美   +2 more
core   +1 more source

Emerging applications of large language models in ecology and conservation science

open access: yesConservation Biology, EarlyView.
Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides   +5 more
wiley   +1 more source

下颌单侧游离端冠外精密附着体义齿三维有限元模型的建立

open access: yesZhongguo shiyan zhenduanxue, 2006
目的建立下颌单侧游离端冠外精密附着体三维有限元模型,为附着体义齿应力分析提供基础。方法采用CT扫描和I-DEAS软件,手工建模。结果建立了能够应用接触单元的下颌单侧游离端冠外精密附着体三维有限模型。结论采用I-DEAS软件可建立游离端冠外精密附着体三维有限元模型,此模型能反映冠外精密附着体构件之间义齿的接触关系,提高模型的仿真性。
王伟   +4 more
doaj  

Mechanistic Analysis of Immunomodulation by Human Induced Pluripotent Stem Cells Derived Mesenchymal Stem Cells in Mice [PDF]

open access: yes, 2015
背景:间充质干细胞是具有自我更新能力和分化能力的组织细胞前体细胞,能够分化为一系列的间质细胞,包括成骨细胞、成软骨细胞、脂肪细胞、肌细胞和内皮细胞等。细胞治疗是再生医学发展的一个重要分支。越来越多的研究发现,间充质干细胞能够修复组织损伤,达到一定治疗效果。因此,间充质干细胞被视为天然组织工程材料的重要种子细胞,具有广阔的应用前景。此外,间充质干细胞具有负性免疫调节能力。在体外共培养条件下,间充质干细胞能够抑制免疫细胞功能,包括抑制T细胞反应,抑制树突状细胞的成熟和抗原提成,抑制B细胞激活和增殖 ...
李成林
core  

Profiling Metacognitive Knowledge and Growth Mindset in EFL Vocabulary Learning

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Guided by the self‐regulated learning (SRL) framework, the present study investigates the associations between metacognitive knowledge and growth mindset in EFL (English as a Foreign Language) vocabulary learning, addressing a critical gap in the literature. While metacognitive knowledge, comprising person, task, and strategy dimensions, plays
Weili (Allen) Xing, Mark Feng Teng
wiley   +1 more source

基于红外相机影像的中华穿山甲体长估计和个体识别

open access: yes野生动物学报
中华穿山甲(Manis pentadactyla)夜行穴居,体表覆盖鳞片,个体外观特征差异较小,基于红外相机影像拍摄到的体貌特征进行个体识别较难,因此探讨一种基于红外相机影像与比例尺估测体长进行中华穿山甲个体识别的方法。在笼舍内布设不同高度的红外相机并拍摄中华穿山甲影像,利用ImageJ软件计算中华穿山甲在红外相机影像中的体长测量值,并计算在不同高度条件下红外相机拍摄的中华穿山甲体长误差值。结果表明:红外相机最佳的布设高度为0.8 m,相对误差为2.76%。基于上述结果 ...
张奕航   +6 more
doaj  

Studies on the Tissue Culture of the Seminal Vesicle IV. Influences of Adrenocortical Hormone upon the Growth of the Tissue of the Seminal Vesicle [PDF]

open access: yes, 1960
In the tissue culture of the seminal vesicle of guinea- p igs, influences of the addition of adrenocortical hormone (hydrocortisone) upon the growth of the tissue of the seminal vesicle were studied.
中野, 順道
core  

Perceptions and Acceptance of Generative Artificial Intelligence Influencing Chinese EFL Learners’ Engagement in Informal Digital Learning of English: Mediating Roles of Self‐Efficacy and Motivation

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Generative artificial intelligence (GenAI) has emerged as a powerful tool in the Informal Digital Learning of English (IDLE) environment, offering personalized, interactive, and innovative language learning experiences that may enhance learning engagement.
Jin Liu, Meilu Liu, Yuan Yao, Dechao Li
wiley   +1 more source

羊水中外切体的鉴定与其RNA浓度测定

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2013
【目的】 分离鉴定羊水中的外切体,并测定羊水外切体中RNA的浓度,探讨从羊水外切体中提取RNA的可行性,从而进一步为胎儿肾脏疾病产前诊断和胎儿肾功能监测寻找生物指标提供研究基础?【方法】 对8例妊娠22 ~ 30周并有产前诊断指征的孕妇分别采用常规羊膜腔穿刺术收集到羊水10 mL进行检测分析,通过多步离心法及蔗糖密度梯度离心法提取羊水中的外切体,采用透射电镜?流式细胞术及激光共聚焦对其进行鉴定,trizol法对分离到的外切体进行RNA提取,紫外分光光度计测定其RNA浓度?【结果 ...
doaj  

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