Results 21 to 30 of about 53,621 (172)

稀有鮈鲫HAN近交系的免疫与生化标记分析 [PDF]

open access: yes, 2012
目的筛选稀有鮈鲫HAN近交系遗传质量检测标记。方法采用鳞片活体移植和同工酶聚丙烯酰胺凝胶电泳法对稀有鮈鲫HAN近交系的遗传纯度进行检测。结果在免疫标记分析中,鳞片同体移植存活率为96.7%以上,野生群体移植存活率为7.4%,而HAN系F22鳞片异体移植的成功率为80%,显著高于野生群体。在生化标记分析中,在HAN系F22中无多态性位点,不同个体的同工酶谱呈现高度一致,在野生群体中有2个多态位点即est2和est3,多态位点的比例为15.56%。结论经过多代近亲交配 ...
曹文宣, 王伟, 王剑伟, 邵燕
core  

Disentangling complex relationships and disjunctions in western Camassia: Integrating multiple criteria to resolve taxonomic boundaries

open access: yesAmerican Journal of Botany, Volume 112, Issue 12, December 2025.
Abstract Premise Understanding genetic and morphological variability helps efforts to sustain landscapes and develop effective species concepts for resolving difficult groups. To unravel puzzling relationships and range disjunctions, we applied morphometrics, phenology, phylogenetics and population genetics in Camassia species with cultural, ecological,
Susan R. Kephart   +5 more
wiley   +1 more source

Threshold responses of floating meadow fish communities to floodplain forest cover in the lower Amazon River

open access: yesConservation Biology, Volume 39, Issue 6, December 2025.
Abstract Forest cover is positively associated with fish biomass and fisheries yield in the Amazon River floodplain, and many species enter flooded forests to feed, spawn, or seek refuge from predation. Floating macrophyte beds, known as floating meadows, in Amazon floodplains support high fish diversity and serve as nursery habitat for many fishes of ...
Sam Grinstead   +6 more
wiley   +1 more source

トウカ ニオケル ゾウケツキ シッカン ニ タイスル ドウシュ ゾウケツ カンサイボウ イショク セイセキ ノ ケントウ [PDF]

open access: yes, 2003
【背景】 造血幹細胞移植療法の確立により、血液悪性腫瘍は治癒の期待できる疾患となりつつある。当科では1992 年9 月より2001 年9 月までの9 年間に24 症例に対して27回の同種造血幹細胞移植を施行した。この中で移植後1 年以上経過した21 症例を対象としてその成績を検討した。 【対象】 年齢は17 歳から49 歳で平均年齢は30.0 歳。男11 例、女10 例とほぼ同数で、全移植例に占める同胞間移植は15 例、非血縁者間移植は6 例であった。疾患別内訳は急性白血病が12 例と最多で、うち骨髄性(
原田 裕子   +2 more
core   +1 more source

Dissimilar climatic niche is predictive of contrasting historical demographic changes and altitudinal shifts in related oak species (Quercus)

open access: yesAmerican Journal of Botany, Volume 112, Issue 11, November 2025.
Abstract Premise Comparative surveys allow us to characterize the influence of specific factors on population genetic diversity and structure. We conducted a comparative phylogeographic study for three Mexican oak species to identify how their climatic niche preferences and breadth may have influenced historical demography and range shifts during ...
Ricardo Gaytan‐Legaria   +3 more
wiley   +1 more source

Aridity and grazing are associated with reduced trait complementarity and higher invasion intensity of Solanum rostratum in native plant communities

open access: yesFunctional Ecology, Volume 39, Issue 11, Page 3255-3268, November 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The biotic resistance hypothesis (BRH) of Elton posits that diverse communities are more resistant to biological invasions. While the effects of climatic stresses and human disturbances on community invasibility have been extensively studied individually, their combined
Kai Shi, Misbah Naz, Chi Zhang, Hua Shao
wiley   +1 more source

小鼠皮肤心脏联合移植模型的建立及移植物功能监测

open access: yesZhongguo shiyan zhenduanxue, 2017
目的探讨小鼠皮肤心脏联合移植模型的建立及移植物功能的监测。方法以BALB/C小鼠、C57BL/6小鼠做为供、受者,单纯皮肤移植组采用尾-背法行皮肤移植,单纯心脏移植组采用腹腔异位心脏移植法行心脏移植,皮肤心脏联合移植组序贯采用尾-背皮肤移植及腹腔异位心脏移植模型。术后采用腹部触诊的方法,监测心脏移植物功能,通过观察残存移植皮片大小,监测皮肤移植物功能。结果皮肤心脏联合移植组皮肤移植物存活时间较单纯皮肤移植组略有延长(皮肤心脏联合移植物v.s.单纯皮肤移植组,8天v.s.7天 ...
胡钰   +4 more
doaj  

Maintenance of Long-term Tolerance by T Regulatory Cells in a Mouse Model of Heart Transplantation [PDF]

open access: yes, 2015
目的:自20世纪以来,临床上心脏移植的一年生存率已经达到90%,但是移植后的慢性排斥以及长期存活仍面临巨大挑战,目前临床上所用的免疫抑制剂多数都必须终身用药,从而会产生多种副作用,危害受者的健康,影响患者的生活质量,所以如何诱导移植物的长期耐受是器官移植面临的重大难题。调节性T细胞是具有免疫调节功能的T细胞亚群,在移植后诱导和维持免疫耐受方面发挥重要作用。其中,CD4+CD25+Foxp3+T细胞(CD4+Foxp3+Treg)主要通过细胞接触发挥调节作用,而CD4+IL-10+IL-4-T细胞(Tr1)
靳宁
core  

Unlocking grass leaf development: foundations for tunable cereal design

open access: yesNew Phytologist, Volume 248, Issue 4, Page 1655-1676, November 2025.
Summary The grass leaf plays a critical role in global food security, generating the carbon stores in cereal grains, which provide > 50% of global calories. As the global population grows, there is an urgent need to increase food production using fewer resources and to develop more resilient agricultural systems to withstand variable climate conditions
Trisha McAllister   +3 more
wiley   +1 more source

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