Results 61 to 70 of about 5,405 (176)

Trade and socioeconomic importance of an invasive giant snail in the endemic‐rich island of São Tomé, Central Africa

open access: yesConservation Biology, Volume 38, Issue 5, October 2024.
Abstract Managing invasive species is crucial to mitigate their negative impacts on ecosystems, yet conflicts may arise when their social benefits are disregarded. Human pressure on the endemic‐rich forests of São Tomé has been high since the island was discovered by the Portuguese in the 15th century, and numerous species have been introduced.
Martina Panisi   +7 more
wiley   +1 more source

A N–CoSe/CoSe2–C@Cu hierarchical architecture as a current collector‐integrated anode for potassium‐ion batteries

open access: yesRare Metals, Volume 43, Issue 8, Page 3702-3712, August 2024.
Graphical abstract AbstractThe highly reversible insertion/extraction of large‐radius K+ into electrode materials remains a tough goal, especially for conversion‐type materials. Herein, we design a current collector‐integrated electrode (N–CoSe/CoSe2–C@Cu) as an advanced anode for potassium‐ion battery (PIBs).
Zi‐Jie Mu   +9 more
wiley   +1 more source

改良IME-FICC 方法对乳腺癌外周血微转移的检测

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2005
【目的】探讨一种改良IME-FICC( 免疫磁珠富集-免疫荧光细胞化学) 法检测乳腺癌外周血微转移 癌细胞及其意义。【方法】通过与磁珠共价结合的表皮细胞黏附分子( EpCAM) 抗体富集外周血中表达EpCAM 的癌细胞, 结合免疫荧光化学法检测细胞角蛋白( CK) 8/18 阳性的癌细胞(呈绿荧光)。放置MCF-7 乳腺癌细胞于 正常人外周血标本中以检验本方法癌细胞回收率及敏感度, 检测20 例正常女性志愿者及12 例Ⅳ期乳腺癌患 者治疗前的外周血标本, 探索其特异性及临床应用可行性 ...
蔡清清   +3 more
doaj  

Salt balance mechanism in mangroves [PDF]

open access: yes, 2007
热带、亚热带海岸潮间带的红树林生态系统处于海洋、陆地和大气的动态交界面,作为独特的海陆边缘生态系统在维持海湾河口生态系统的稳定中起着特殊的作用。生长在潮间带高盐环境中的红树植物,经长期的自然选择和进化适应,在生理生化及形态方国家自然科学基金资助项目(30200031);; 福建省自然科学基金资助项目 ...
张宜辉, 林鹏, 王文卿
core  

Application of Ionic Liquids in Extraction and Separation [PDF]

open access: yes, 2008
室温离子液体是由正负离子组成的室温为液体的熔融盐,因其具有极低的蒸汽压、可设计性和特殊的选择溶解能力等独特的性质,使得其在萃取分离有机物及金属离子、液相微萃取和汽油柴油中脱硫及碱性氮化物等领域都有着广泛应用。综述了离子液体在萃取分离上的应用进展。Ionic substances with melting points close to room temperature were referred as room-temperature ionic liquids,which showed lots of
杨青海   +5 more
core  

Optimization of cellulase-assisted extraction of volatile oil from Acorus tatarinowii and study on its inhibitory components on GABA-T activity [PDF]

open access: yes
Objective: This study aimed to establish a hollow fiber ligand fishing method for screening γ- Aminobutyrate transaminase (GABA-T) inhibitory component from the volatile oil of Acorus tatarinowii.
CHEN Liang   +3 more
core   +1 more source

坡面侵蚀过程中泥沙有机碳流失特征分析

open access: yesShuitu Baochi Xuebao, 2017
以野外布设的径流小区为研究对象,采用模拟降雨方法研究随机条件下降雨侵蚀过程中泥沙有机碳含量及流失过程的动态变化规律。结果表明:(1)降雨侵蚀过程中泥沙有机碳含量随降雨的进行逐渐降低并趋于平稳,与坡面土壤有机碳含量相比显著增高(p<0.01),有机碳在泥沙中明显富集,富集比最大值达1.780,泥沙中有机碳含量及富集比随侵蚀速率的增加明显减小且趋于稳定;(2)泥沙有机碳流失速率随降雨的进行先波动增大,达到最大值后又波动减小,最后逐渐趋于准稳定,整个过程呈单峰分布;(3 ...
任瑞雪, 杨明义, 王永吉
doaj  

不同马铃薯品种对Cd、Pb吸收累积的差异

open access: yesShuitu Baochi Xuebao, 2019
采用田间试验法,以中南地区主要种植的11个马铃薯品种为研究对象,测定马铃薯植株各部位重金属Cd、Pb含量,探讨不同品种的马铃薯对Cd、Pb的吸收累积差异,为马铃薯的安全种植提供实践参考。结果表明:Cd-Pb复合污染下,马铃薯块茎鲜重、茎叶鲜重以及根、茎叶、块茎中Cd、Pb含量在品种间均表现出显著差异。11个马铃薯品种块茎Cd含量范围为0.39~0.67 mg/kg,超标率100%,块茎Pb含量为0.16~0.43 mg/kg,超标率81.8%。马铃薯各部位Cd、Pb含量均呈现根 > 茎叶 ...
黄芳   +7 more
doaj  

空肠弯曲杆菌诱导的结直肠癌的转录组学分析

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2022
目的探究空肠弯曲杆菌(C. jejuni)的致癌机制。方法将18只雌性的C57BL/6 ApcMin/+小鼠随机分为C. jejuni感染组9只和空白对照组9只。采用灌胃C. jejuni和葡聚糖硫酸盐共同诱导ApcMin/+小鼠产生结直肠癌。实验终点时,取各组小鼠结直肠组织解剖计数肿瘤个数,分别提取C.
李燕, 毛玉丹, 张幸鼎, 牟相宇
doaj  

Biochemical and transcriptome analysis of small abalone Haliotis diversicolor to TBT exposure [PDF]

open access: yes, 2010
由于海洋环境的巨大稀释能力,使得长期低浓度存在于海洋中的污染物所造成的生物生态效应很难在短时间内表现出来。但是,这种变化可在生物的细胞和分子水平上引起改变,如何识别这些变化,并通过这些变化分析可能造成的生物生态效应,是环境生物监测技术的研究重点。 本研究以杂色鲍(Haliotisdiversicolor)肝胰腺和血淋巴为材料,测定了0.35µg(Sn)/L三丁基锡(TBT)暴露2h,6h,24h,48h,96h和192h后的酸性和碱性磷酸酶(ACP和AKP),超氧化物歧化酶(SOD ...
贾锡伟
core  

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