Results 21 to 30 of about 143,222 (253)

Seasonal Spatial Population Density Distribution Dynamics of Lynx and Ungulate Prey in Cold‐Temperate Coniferous Forests 寒温带针叶林猞猁和有蹄类猎物种群密度空间分布的季节性动态研究

open access: yesIntegrative Conservation, EarlyView.
This study used camera trap data from 6 years between 2016 and 2021 and generalized linear mixed models to explore the factors that influence the spatial density distribution of lynx and its prey populations in warm and cold seasons in Inner Mongolia Hanma National Nature Reserve, China.
Wentao Zhang   +11 more
wiley   +1 more source

Comparison between shoot Regeneration Ability in Calli Derived from Immature Embryos of Wild and Cultivated Barley [PDF]

open access: yes, 1995
The variation in shoot regeneration obility of calli derived from immature embryos was examined in 95 wild strains, 82 of which were of Hordeum spontaneum and 13 of which were H.
Rikiishi, Kazuhide   +2 more
core  

Mixed‐methods systematic review exploring the associations underpinning active outdoor play with connection to nature and environmental stewardship

open access: yesPeople and Nature, EarlyView.
Abstract Active outdoor play has been positioned in the literature as an opportunity to address concerns over climate (in)action and the rising trend of disconnection from the outdoors and nature. The objective of this systematic review was to examine associations between active outdoor play and people's connection to nature and/or environmental ...
Louise de Lannoy   +10 more
wiley   +1 more source

Studies on the critical period of floral differentiation and changes of endogenous hormone contents in the decapitated seedlings of cucumber(黄瓜去顶苗花分化临界期的确定及内源激素的动态变化)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2004
通过在诱花和诱芽培养基之间转换培养,发现黄瓜去顶苗花分化临界期是培养后的第5至6天(即去顶后的3至4天).对花芽分化初期子叶节中内源激素质量分数的测定表明,IAA质量分数在花芽分化初期处于较低水平,ZT质量分数呈下降趋势,GA3质量分数则出现升-降-升的波动状态.ZT/IAA、GA3/IAA比值的变化趋势相似,0至2天上升,2至3天下降,3至4天再上升.根据实验结果,联系黄瓜去顶苗成花的形态变化过程,对激素质量分数变化与花芽分化之间的关系进行了讨论.
WANGLi-lin(王利琳)   +3 more
doaj   +1 more source

キュウコン アイリス ノ キュウ ケイセイ ニカンスル ケンキュウ ダイ2ホウ : キュウ ケイセイ オヨビ ハナメ ブンカ ト フツウ ハスウ トノ カンケイ [PDF]

open access: yes, 1968
球根アイリスにおいて花芽を分化した個体は側球(偏平球)を形成し,花芽を分化しない個体は成球(丸球,中心球)を形成する.一般に大球を植えた場合は花芽を分化するが,掘上期の極端に早い球を植えた場合,植付期の早い場合,掘上げ後球を9℃以下の低温で貯蔵した場合は,比較的大球も花芽を分化せず成球を形成する.これらの点は促成栽培や球生産を目的とした栽培において考慮されている.しかし花芽分化および球形成のための条件,花芽を分化しない個体が成球を形成する理由など,花芽分化と球形成との関係についてまだ明かでない点が多い ...
青葉 高
core   +1 more source

Range‐wide sampling reveals cryptic lineages but largely conserved mycorrhizal associations in the Japanese fairy lantern Thismia kobensis

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
The jewel‐like flowers of Thismia are as rare as they are beautiful, often recorded from only a single site per species. Access to 15 populations of T. kobensis has enabled an uncommon, range‐wide assessment of morphology, genetics, and fungal partners. Our analyses showed that T.
Kenji Suetsugu   +4 more
wiley   +1 more source

Experimental study on effect of bone marrow mesenchymal stem cells on the function of severe fatty liver graft [PDF]

open access: yes, 2015
第一章:大鼠骨髓间充质干细胞的分离、培养与鉴定 目的体外培养活性好、纯度高的骨髓间充质干细胞 方法采用密度梯度离心法分离培养骨髓间充质干细胞,采用流式细胞仪鉴定其表面抗原的表达情况,用成软骨试剂、成脂试剂诱导BMSCs分化成软骨细胞、脂肪细胞。 结果获得细胞具有明显的贴壁性,其细胞表面高表达CD44、CD90、CD29抗原分子,低表达CD45、CD34、CD11b抗原分子。成软骨诱导分化3周,BMSCs即可分化成软骨细胞,成脂诱导分化2周,即可分化成脂肪细胞。 结论密度梯度离心法可以获得活性好、纯度高 ...
范洪凯
core  

Winter Track Survey of the Amur Tiger (Panthera tigris altaica) in the Southwest Primorsky Province of Russia 俄罗斯滨海边疆区西南部东北虎 (Panthera tigris altaica) 冬季足迹调查

open access: yesWildlife Letters, EarlyView.
In the winter of 2021/2022, a winter track survey revealed 43–46 tigers (without cubs) in 5.4 thousand km2 of suitable habitats in the Southwest Primorsky Province of Russia. In the same period, a network of camera traps registered 54 adult/subadult tigers here.
Yury Darman, Dina Matiukhina
wiley   +1 more source

虚实系统互驱的混合增强智能开放创新平台的架构与方案

open access: yes智能科学与技术学报, 2019
首先提出了混合增强智能开放创新平台建设的总体目标以及面临的问题,提出了一种虚实系统互驱的平台架构方案。然后阐述了平台的基本形态,并详述了平台各层的模块机理和作用,以及涉及的关键技术,如人机交互技术、数据处理技术和数字虚拟工业技术。最后设计了开放创新的保障和激励机制,并探讨了区块链技术在混合增强智能开放创新平台数据安全方面的应用。
张俊   +7 more
doaj  

Induction of differentiation of human myeloid leukemia cells by cytokinins, plant hormones [PDF]

open access: yes, 2004
急性骨髄性白血病はall trans-retinoic acidを投与することで治療することが可能である。この治療効果は分化誘導によることが明らかにされたことから,分化誘導機構の解明と,さらなる有効な分化誘導剤の開発が必要とされている。植物ホルモンのサイトカイニンは植物に多彩な生理作用をもたらすが,その一つに,カルスから不定芽を誘導し,植物体へと再分化させる活性がある。本論文は,カルス細胞とがん細胞は「増殖の盛んな未分化細胞であり,分化誘導が可能である」という類似点があることに着目し ...
Ishii Yuki, 石井 由起
core  

Home - About - Disclaimer - Privacy