Results 51 to 60 of about 216,068 (211)

“Semper supra”? Trump administration policy narratives and the creation of the space force

open access: yesReview of Policy Research, EarlyView.
Abstract In 2019, the Donald Trump administration rejected the draft Treaty on the Prevention of Placement of Weapons in Space (PPWT) in the UN Conference on Disarmament and instead created the Space Force, the first new US military service branch established in decades.
Jeffrey S. Lantis
wiley   +1 more source

電子衝撃による n-パラフィンの分解と分子内電荷分布との関係

open access: yes, 1960
放射線分解の基礎過程に関連して, 電子衝撃による n-パラフィンの分解と分子内電荷分布との関係をしらべるために, ブタンからデカンまでの n-パラフィンの系列について equivalent orbital の方法によって電荷分布を計算し, C-C 結合の切断確率をもとめ, マススペクトル・パターンと比較した。 その結果によれば, n-オクタンまでは各 C-C 結合の切断確率の順序がこのような取り扱いによってほぼ説明される。 しかし, それ以上の炭素数のものについては, 一般に実験結果と一致しない ...
賢二 笛木, 鋼蔵 広田
semanticscholar   +1 more source

Evaluation of canine epidermis and keratinocytoids (keratinocytic organoids) by transmission electron microscopy

open access: yesVeterinary Dermatology, EarlyView.
Background – Skin disease is a common complaint in veterinary medicine. Current models often use live animals. Epidermal organoids (keratinocytoids) are 3D miniature organs created in culture from single epidermal keratinocytes. These keratinocytoids can be used as an alternative to live animal studies to investigate epidermal structures and skin ...
Clinson C. Lui   +5 more
wiley   +1 more source

Who Gets to Speak When the Roof Is on Fire? Leadership in Political Crisis Communication 情况失控时谁能发声?政治危机传播中的领导力 ¿Quién Puede Hablar Cuando El Techo Está En Llamas? Liderazgo En La Comunicación De Crisis Políticas

open access: yesRisk, Hazards &Crisis in Public Policy, Volume 16, Issue 3, September 2025.
ABSTRACT The communication of political leaders towards voters has become increasingly important in modern democracies – even more so during crises. This article addresses the question of which factors influence the presence of heads of government during crisis communication?
Lore Hayek   +2 more
wiley   +1 more source

非常规源岩层系油气形成分布与前景展望

open access: yesEarth Science-Journal of China University of Geosciences, 2022
C. Zou   +7 more
semanticscholar   +1 more source

電気クロマトグラフによるクロム錯イオンの電荷分布分析(第2~3報)

open access: yes, 1955
著者等は先に電荷の異る蓚酸クロム錯イオンの電気クロマトグラフによる分離について報告した.本報告はこの分析方法がクロム核内の酸根の種類を変えた場合,またアルカリ添加によってある程度オール化を起した場合等にも適用し得るや否やを検討し,以下述べる様な結果を得たのでここに報告する.蓚酸クロムで確立した電気クロマトグラフによるクロム錯イオンの電荷分布分析法が核内にSO4-2, SCN-, NH3 等を含む場合,またアルカリ添加時,加熱時等のクロムにも拡大適用し得る事を認めた ...
亮 川村, 浩志 岡村
semanticscholar   +1 more source

黑龙江省原麝资源现状及保护

open access: yes野生动物学报, 2003
中国是麝资源最丰富的国家。世界共有五种麝,即原麝(Moschusmoschiferus)、林麝(M.berezowskii)、马麝(M.sifanicus)、喜马拉雅麝(M.Ieucogaster)和黑麝(M.fuscus),五种麝中国均产,并且是主要分布区,其分布区是以中国为中心的,少数周边国家也有麝的分布。 原麝分布于我国东北(黑龙江、吉林、辽宁)、华北(内蒙古、河北、山西)、新疆的阿尔泰山区和安徽省的大别山区 ...
吴建平, 张明海, 陶金
doaj  

Floristic analysis of the seed plants from Yandang Mountain of Yueqing, Zhejiang(浙江乐清雁荡山种子植物区系分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2018
在文献查阅、野外调查和标本鉴定的基础上,对浙江乐清雁荡山种子植物区系特征进行了统计分析,得到:(1)区域内共有野生种子植物732种(含种下类群),隶属147科、433属;科、属水平显示出多样性,含1个种的科和属分别占总科数和总属数的41.5%和67.9%. (2)科的分布区类型中,热带成分有64科,占总科数的42.9%,温带成分共36科,占24.6%;属的分布区类型中,热带成分和温带地理成分分别占总属数的49.1% 和50.9%,泛热带分布及其变型所占比例最大,为24.1%.
CHENWeijie(陈伟杰)   +3 more
doaj   +1 more source

World‐wide impacts of climate change and nitrogen deposition on vegetation structure, composition, and functioning of shrublands

open access: yesNew Phytologist, Volume 247, Issue 3, Page 1117-1128, August 2025.
Summary Environmental changes and their effects are among the most pressing topics of today's ecological research. Shrublands, although widespread across the globe, remain understudied in this respect. We conducted a global meta‐analysis of 81 shrubland sites subjected to experimental warming, shifts in precipitation (e.g.
Daijun Liu   +11 more
wiley   +1 more source

Transformation of social‐ecological systems in the Songhua River Basin, Northeast China: Lessons for a more sustainable development

open access: yesPeople and Nature, Volume 7, Issue 7, Page 1749-1768, July 2025.
Abstract Social‐ecological systems (SES) are coupled systems formed by the intricate interactions between humans and nature. Our movement towards sustainable lifestyles requires a robust understanding of these interactions. Achieving a sustainable win‐win situation for both social and ecological systems, therefore, necessitates a sound scientific ...
Na Sa   +6 more
wiley   +1 more source

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