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外泌體(exosome)是細(xì)胞分泌囊泡(extracellular vesicles)的一種亞型,存在于生物體液中,并參與多種生理和病理過(guò)程。外泌體被認(rèn)為是細(xì)胞間通信的一種新機(jī)制,允許細(xì)胞交換蛋白質(zhì)、脂質(zhì)和遺傳物質(zhì)。過(guò)去,細(xì)胞分泌的外泌體一度被認(rèn)為只是參與廢物排泄;現(xiàn)在,隨著高通量蛋白質(zhì)組學(xué)和基因組學(xué)的發(fā)展,外泌體被廣泛認(rèn)為是生物體內(nèi)細(xì)胞間短距離和長(zhǎng)距離交流的高度保守的途徑,這種細(xì)胞間通信對(duì)于正常細(xì)胞和腫瘤細(xì)胞都是非常重要的。[查看]
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http://m.baichuan365.com/Article/wmtdyyyjyyytz_1.html
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現(xiàn)代認(rèn)知神經(jīng)科學(xué)以及功能磁共振成像技術(shù)(functional Magnetic Resonance Imaging, fMRI)的不斷發(fā)展使得采用科學(xué)手段對(duì)大腦視覺(jué)皮層信號(hào)進(jìn)行解讀成為可能。研究人腦視覺(jué)信息解碼模型不僅可以加深人們對(duì)人腦視覺(jué)信息處理機(jī)制的研究,還可以有力地促進(jìn)新一代腦-機(jī)接口(Brain-Computer Interface, BCI)技術(shù)的發(fā)展。[查看]
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http://m.baichuan365.com/Article/rnsjxxbjmyjfmqdxjz_1.html
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組蛋白乙酰化是表觀遺傳修飾的重要方式之一。腫瘤的產(chǎn)生與組蛋白乙酰化與去乙酰化的調(diào)控失衡關(guān)系密切,而組蛋白去乙酰化酶抑制劑(histone deacetylase inhibit,HDACi)可以改變乙酰化調(diào)控的失衡狀態(tài),提高細(xì)胞乙酰化水平,抑制腫瘤細(xì)胞的增殖和轉(zhuǎn)移。目前,研究人員紛紛嘗試將HDACi用于輻射增敏研究,普遍認(rèn)為經(jīng)HDACi預(yù)處理的細(xì)胞乙酰化水平越高,輻射敏感性越強(qiáng),但目前該研究?jī)H限于不同劑量HDACi對(duì)細(xì)胞輻射敏感性的影響,對(duì)HDACi預(yù)處理時(shí)間的影響尚未見(jiàn)報(bào)道。[查看]
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http://m.baichuan365.com/Article/xbyxhdfszmyjqdjz_1.html
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REWIND研究是一項(xiàng)多中心、隨機(jī)、雙盲、安慰劑對(duì)照研究,旨在評(píng)估每周一次胰高血糖素樣肽1受體激動(dòng)劑(GLP-1RA)Trulicity 1.5mg相對(duì)于安慰劑(均添加至標(biāo)準(zhǔn)護(hù)理)對(duì)2型糖尿病成人患者心血管(CV)事件的作用。主要CV終點(diǎn)為主要不良心血管事件(MACE,包括心血管死亡、非致死性心肌梗死、非致死性卒中)的首次發(fā)生時(shí)間,次要終點(diǎn)包括主要CV終點(diǎn)中每個(gè)組成部分,以及包括視網(wǎng)膜或腎臟疾病在內(nèi)的復(fù)合臨床微血管預(yù)后、不穩(wěn)定性心絞痛住院、需要住院治療的心衰、需要就診的緊急心衰、全因死亡率。[查看]
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http://m.baichuan365.com/Article/llglp1stjdjtrulicity_1.html
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通過(guò) FAST 法識(shí)別腦中風(fēng)中風(fēng)發(fā)作前,會(huì)有一些常見(jiàn)的征象,即“FAST”,即臉部 (Face)、手臂 (Arms)、言語(yǔ) (Speech)、時(shí)間 (Time) 四個(gè)單詞英文首字母的縮寫(xiě)。臉部 (Face) 指面龐向一側(cè)下垂,或浮現(xiàn)扭曲的笑容。手臂 (Arms) 指患者可能無(wú)法將雙臂舉到同一高度。言語(yǔ) (Speech) 指觀察患者是否口齒清晰、言辭達(dá)意或能聽(tīng)懂對(duì)方說(shuō)的話(huà)。最后一個(gè)要素是時(shí)間 (Time);如果患者出現(xiàn)以上任何癥狀,應(yīng)立即撥打急救電話(huà)。[查看]
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http://m.baichuan365.com/Article/10y29sjzfrssktxgzfxz_1.html
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胚胎發(fā)育是高度復(fù)雜的有機(jī)體發(fā)育的一個(gè)重要階段,比如人類(lèi),僅有非常有限的胚胎祖細(xì)胞能夠成功制造出成年機(jī)體內(nèi)部所有類(lèi)型的細(xì)胞,為了理解這一過(guò)程發(fā)生的機(jī)制,研究人員就需要新方法能夠測(cè)定克隆歷史的發(fā)生,同時(shí)還能在單細(xì)胞分辨率下進(jìn)行細(xì)胞的識(shí)別;基于此,研究人員開(kāi)發(fā)出了一種名為ScarTrace的新技術(shù),該技術(shù)能夠添加熒光蛋白轉(zhuǎn)基因的串聯(lián)拷貝,從而就能在CRISPR-Cas9基因編輯的轉(zhuǎn)錄過(guò)程中有效識(shí)別所遺留的“疤痕”。[查看]
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http://m.baichuan365.com/Article/tpxjshncgzzptzxbfyzd_1.html
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根據(jù)最近在美國(guó)血液協(xié)會(huì)年度會(huì)議上由來(lái)自西雅圖兒童研究所做出的報(bào)告,一項(xiàng)臨床II期試驗(yàn)結(jié)果表明Abatacept能夠幾乎完全治愈晚期癌癥患者或血液紊亂患者在接受干細(xì)胞移植手術(shù)后出現(xiàn)的致命性的排異反應(yīng)(graft-versus-host disease,GvHD)。[查看]
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http://m.baichuan365.com/Article/mylfkjhwqxcytyzpyfy_1.html
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在一項(xiàng)新的研究中,研究人員發(fā)現(xiàn)在常規(guī)的髖關(guān)節(jié)置換術(shù)(hip replacement surgery)期間通常丟棄的骨膜組織富含成體干細(xì)胞,有望提供一種用于再生醫(yī)學(xué)的干細(xì)胞新來(lái)源。相關(guān)研究結(jié)果近期發(fā)表在Stem Cells Translational Medicine期刊上[查看]
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http://m.baichuan365.com/Article/sctmfxyzxdgxblygmzz_1.html
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日前,來(lái)自韓國(guó)蔚山國(guó)家科學(xué)技術(shù)研究所的研究人員通過(guò)研究開(kāi)發(fā)出了一種新技術(shù),該技術(shù)能夠有效在尿液或血液中有效鑒別出促進(jìn)癌癥發(fā)生的物質(zhì),相關(guān)研究刊登于國(guó)際雜志ACS Nano上。文章中,研究人員開(kāi)發(fā)出了一種集成的離心微流體平臺(tái)(Exodisc),這種設(shè)備能夠?qū)δ蛞褐械陌饽づ?extracellular vesicles,EVs)進(jìn)行分離。[查看]
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http://m.baichuan365.com/Article/acsnanotpkxjlylznyds_1.html
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如今研究者以CRISPR來(lái)對(duì)成簇規(guī)律間隔的短回文重復(fù)序列(clustered regularly interspaced short palindromic repeats)進(jìn)行命名,同時(shí)他們還發(fā)現(xiàn),CRISPR-Cas能夠幫助細(xì)菌抵御外來(lái)病毒的入侵,盡管CRISPR系統(tǒng)能夠用來(lái)進(jìn)行基因的編輯,但Mojica和其它研究者們關(guān)于該系統(tǒng)的工作機(jī)制仍然存在一些問(wèn)題,這種微生物免疫系統(tǒng)是如何進(jìn)化的?[查看]
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http://m.baichuan365.com/Article/zbkxjsrjxcrisprqyd5g_1.html
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迄今為止第一個(gè)納米賽車(chē)比賽,nanorace。有一個(gè)很?chē)?yán)肅的科學(xué)目的:對(duì)一臺(tái)最近安裝的特殊掃描隧道顯微鏡進(jìn)行測(cè)試。這次比賽也同時(shí)能讓人們深入了解納米汽車(chē)如何應(yīng)對(duì)極端的環(huán)境。[查看]
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http://m.baichuan365.com/Article/zyzsmsdxwjxckddsjzxn_1.html
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Syloid(R) FP硅膠為美國(guó)Grace推出的一系列多功能介孔微粉硅膠,其獨(dú)特的內(nèi)部三維結(jié)構(gòu)、吸收容量及顆粒尺寸等特性,使其可以在藥品、營(yíng)養(yǎng)品和保健品等應(yīng)用具有顯著優(yōu)勢(shì)。在藥用輔料領(lǐng)域,具有助流劑、消除靜電、抗結(jié)塊、防潮保護(hù)、改善穩(wěn)定性等功能,備受知名醫(yī)藥企業(yè)青睞。[查看]
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http://m.baichuan365.com/Article/gracesyloidfpdgnjkgj_1.html
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安慰劑效應(yīng)(Placebo Effect)這個(gè)現(xiàn)象由來(lái)已久。科學(xué)家們發(fā)現(xiàn)在許多場(chǎng)合下,安慰劑也能給患者的健康帶來(lái)益處:一些研究發(fā)現(xiàn)安慰劑能緩解偏頭痛患者的疼痛與其他癥狀;另一些科研人員則發(fā)現(xiàn)在用安慰劑替代藥物后,帕金森患者的癥狀沒(méi)有出現(xiàn)反彈。[查看]
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http://m.baichuan365.com/Article/awjwhyxzywmyxt_1.html
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西寶生物提供高品質(zhì)N-[3-(2-呋喃基)丙烯酰]-L-苯丙氨酰-甘氨酰-甘氨酸(FAPGG)。血管緊張素轉(zhuǎn)換酶(ACE)是腎素-血管緊張素-醛固酮的重要成分,主要用于肺部病的診斷,F(xiàn)APGG作為ACE底物用于測(cè)定其酶活性。[查看]
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http://m.baichuan365.com/Article/fapggxgjzszhmjcydw_1.html
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923級(jí)硅膠是GB/T11132和ASTM D1319標(biāo)準(zhǔn)推薦使用的、專(zhuān)門(mén)用于分析石油中烴類(lèi)含量的高純度色譜專(zhuān)用硅膠。美國(guó)Grace 公司在硅膠材料領(lǐng)域久負(fù)盛名,西寶生物專(zhuān)業(yè)代理Grace生產(chǎn)的923級(jí)硅膠,免費(fèi)熱線(xiàn)400 021 8158。[查看]
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http://m.baichuan365.com/Article/xbswzytggrace923jgjg_1.html
記錄總數(shù):629 | 頁(yè)數(shù):42 <...33343536373839404142
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乙酰丁香酮 Acetosyringone
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1-萘乙酸 1-Naphthaleneacetic acid
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LNT-N-acetyl-propargyl
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LNnH-N-acetyl-propargyl
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LNnH-N-acetyl-spacer4-NH2
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LNnT-N-acetyl-propargyl
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Core type 2 -N-acetyl-propargyl
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Tetra-N-Acetyl-D-Lactosamine / TetraLacNAc
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Tri-N-Acetyl-D-Lactosamine / TriLacNAc
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Di-N-Acetyl-D-Lactosamine / DiLacNAc
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N-Acetyl-D-Lactosamine / LacNAc
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Blood group H antigen triaose type5-NAc-spacer1-NH2
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Blood group H antigen pentaose type 1-N-Acetyl-Propargyl
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Blood group H antigen pentaose type 1-Nacetyl-Spacer 3-Biotin
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Blood group H antigen tetraose type 2 -N-acetyl-Propargyl
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6GrA1-N-acetyl-spacer4-NH2
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6GrA1-NAc-spacer2-NH2
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Blood group A antigen tetraose type 5-NAc-spacer2-NH2
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Blood group A antigen triaose-N-acetyl-propargyl
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Blood group A antigen tetraose type 5-NAc-spacer1-NH2
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6GrA1-NAc-spacer3-Biotin
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Blood group A antigen tetraose type 5-N-acetyl-propargyl
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Gb5-N-Acetyl-spacer 3-Biotin
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Gb5-N-Acetyl-Propargyl
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Acetyl-Coenzyme A,trisodium salt
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Acetyl-Coenzyme A,trilithium salt
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N-氨基甲酰甲基乙磺酸, ACES, 99%
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2-Chloroacetamide (CAA),crystalline powder
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2-acetyl-3,5-dihydroxyphenyl-O-β-D-glucopyranos
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2-deacetyl wilformine
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-
2-deacetyl wilformine
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NNN-N-D-Glucoside Acetate Salt
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NNK-β-D-glucoside Acetate Salt
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Acetoxymethyl-NNK
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1mol/l Acetic Acid (1N)
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0.1mol/l Acetic Acid(N/10)
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0.2mol/l Disodium Dihydrogen Ethylenediamine Tetraacetate Solution
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0.025mol/l Disodium Dihydrogen Ethylenediamine Tetraacetate Solution
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Calcium Acetate 1.0 M
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Calcium Acetate 1.0 M
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Acetic acid 0.5N 0.5M
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Acetic acid 0.5N 0.5M
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Acetic acid 0.1N 0.1M
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Acetic acid 0.1N 0.1M
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Acetic acid 1.0N 1.0M
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Acetic acid 1.0N 1.0M
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Acetic acid 2.0N 2.0M
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Acetic acid 2.0N 2.0M
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Acetic acid 5.0N 5.0M
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Acetic Acid 1.0N (1.0M)
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Perchloric Acid 0.01M 0.01N in Acetic Acid
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Perchloric Acid in Acetic Acid 0.1N 0.1M
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Perchloric Acid in Acetic Acid 0.1N 0.1M
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Perchloric Acid in Acetic Acid 0.1N 0.1M
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Perchloric Acid in Acetic Acid 0.5N 0.5M
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Perchloric Acid in Acetic Acid 0.5N 0.5M
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Lead (II) Acetate 0.05M
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Lead (II) Acetate 0.05M
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Lead (II) Acetate 0.5M
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Lead (II) Acetate 0.5M
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Crystal Violet Indicator, 0.1% (w/v) in Glacial Acetic Acid, for Nonaqueous Titrations
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Crystal Violet Indicator, 0.2% (w/v) in Glacial Acetic Acid, for Nonaqueous Titrations
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Crystal Violet Solution 1% in Glacial Acetic Acid
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Non-aqueous filling solution; 1mol/litre lithium chloride (LiCl), dissolv in acetic acid
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Saturated Sodium Perchlorate in Glacial Acetic Acid
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Acetic Acid
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1w/v% Crystal Violet Acetic Acid Solution
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0.2w/v% p- Naphtholbenzein Acetic Acid Solution
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0.1N sodium acetate in glacial acetic acid
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-
TBN Titration solvent-2:1 chlorobenzene and glacial acetic acid
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-
(S)-(-)-2-Methoxy-2-(trifiuoromethyl)phenylacetic Acid
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-
(R)-(+)-2-Methoxy-2-(trifluoromethyl)phenylacetic Acid
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-
Chromium(lll) Acetylacetonate
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-
4-Acetamido-TEMPO, free radical
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-
4-Acetamido-TEMPO, free radical
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-
Butyl Acetate
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Germanium H2O / Trace HF 1,000ug/mL
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-
Germanium H2O /Trace HF 1,000ug/mL
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Germanium H2O / Trace HF 1,000ug/mL
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Germanium H2O / Trace HF 10,000ug/mL
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Acetic Acid
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-
Acetic Acid
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-
Acetonitrile
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-
Ethyl Acetate
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-
Acetone, Spectrosol(R)
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Acetonitrile, Spectrosol(R)
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Acetonitrile
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-
Ethyl Acetate
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-
Acetonitrile, Luminasol(R)
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Acetanilide Standard
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Acetate in water 1000ppm
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Acetate 1mg/ml (1,000ppm)
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Acetate- 0.2mg/ml (200ppm)
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Acetate 100ppm in H2O
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Acetaldehyde
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Trace Elements in White Rice Flour Set(Cd Level I&II)
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Trace Elements in Tea Leaf Powder
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Trace Elements, Arsenobetaine anc jrcury in Swordfish Tissue
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Trace Elements and Arsenic Compounds in Seaweed (Hijiki)
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Trace Elements, Arsenobetaine and Methylmercury in Cod Fish Tissue
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Trace Elements in Lake Sediment
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Trace Elements in River Water (Elevated Level)
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Trace Elements in Marine Sediment
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-
Melting Point Standard Set Vanillin (81-83°C) Phenacetin (134-136°C)°Caffeine (235-237°C)
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Tributyltin(IV) Acetate
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N, N-Dimethylaceatamide
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N, N-Dimethylaceatamide
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-
Acetic Acid, CH3COOH, 20% v/v
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Mobile Phase Buffer pH 4.5 - Sodium Acetate Trihydrate
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Mobile Phase Buffer pH 4.5 - Sodium Acetate Trihydrate
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-
Zinc Acetate 10% w/v
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-
Sodium Acetate, 0.2M
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-
Sodium Acetate, 2M
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-
Acetonitrile, 50% v/v
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Lead Acetate Solution (CH COO) Pb, 10%
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-
APDC Butyl Acetate-Ethanol Reagent
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N-Acetyl-L-Cysteine,crystallizate
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N-Acetylneuraminic acid aldolase
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-
N-Acetylneuraminic acid aldolase
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Oxaloacetate Decarboxylase
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Acetate-CoA Ligase (Acetyl-CoA Synthetase),from yeast, lyophilizate
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Acetate-CoA Ligase (Acetyl-CoA Synthetase),from microorganism, lyophilizate
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Cholesterol Esterase, from Candida cylindracea, lyophilizate
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Cholesterol Esterase, from Candida cylindracea, solution
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CMP-N-Acetylneuraminic Acid,sodium salt
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-
UDP-N-Acetylglucosamine,disodium salt
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-
Ethyclozate metabolite (CIA:5-Chloro-3 (1H)-indazolacetate)
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-
ACE5599
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-
N-Chloroacetyl-2,6-diethylaniline
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-
Ethylene glycol bis (trichloroacetate)
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Presep(R) Diatomaceous Earth, Granular (Column Volume 15mL)
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Presep(R) Diatomaceous Earth, Granular (Column Volume 6ml)
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USP Solution Acetate Buffer TS Conforms to USP 34
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USP Solution Acetate Buffer TS Conforms to USP 34
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USP Solution Acetic Acid 2.00 Normal Conforms to USP 34
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USP Solution Acetic Acid 2.00 Normal Conforms to USP 34
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USP Solution Acetic Acid-Ammonium Acetate Buffer TS Conforms to USP 34
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USP Solution Acetic Acid-Ammonium Acetate Buffer TS Conforms to USP 34
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USP Solution Cupric Acetate TS Conforms to USP 34
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USP Solution Cupric Acetate TS Conforms to USP 34
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USP Solution Lead Acetate TS Conforms to USP 34
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USP Solution Lead Acetate TS Conforms to USP 34
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USP Solution Potassium Acetate TS Conforms to USP 34
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USP Solution Potassium Acetate TS Conforms to USP 34
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USP Solution Sodium Acetate TS Conforms to USP 34
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USP Solution Sodium Acetate TS Conforms to USP 34
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European Pharmacopoeia Reagent Acetic acid (30%)
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European Pharmacopoeia Reagent Acetic acid, Dilute (12%)
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European Pharmacopoeia Reagent Acetic anhydride Solution R1
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European Pharmacopoeia Reagent Lead acetate cotton
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European Pharmacopoeia Reagent Lead acetate paper
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European Pharmacopeoia Lead Acetate Solution
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European Pharmacopoeia Reagent Methoxyphenylacetic reagent
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European Pharmacopoeia Reagent Thioacetamide Solution
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European Pharmacopoeia Reagent Zinc acetate Solution
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European Pharmacopoeia Reagent Buffered acetone Solution
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European Pharmacopoeia Reagent Acetate Buffer Solution PH4.6
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6-Acetylcodeine,1.0mg/mL 于乙腈
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Acesulfame potassium impurity B
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Trace Elements in Water 標(biāo)準(zhǔn)物質(zhì)
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Androsterone 3-acetate,certified
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Corticosterone-21-acetate