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xanthine n.【化學】黃嘌呤;黃質,羥基嘌呤。

xanthippe

In the present study , after treated with xanthine / xanthine oxidase system , cells viability , cells cycle , the expression of apoptosis proteins p53 , bax and bcl - 2 , and the level of superoxidase , glutathione , malondialdehyde of neuronal differentiated pc 12 cells in the absence and / or presence of c . chinensis extract were also compared 通過比較活性氧作用細胞后的細胞活力、細胞周期、凋亡相關蛋白( p53 、 bax 、 bcl - 2 )水平以及細胞中sod 、 gsh 、 mda的差異,發現菟絲子提取物對活性氧引起的細胞凋亡有一定的保護作用。

Protein kinase a is camp - dependent kinase , one of the most important signal transduction pathways , plays a pivotal role in growth , differentiation , tumor occur , cell cycle control , etc . pka activators such as camp , 8 - br - camp or phosphodiesterase ( pde ) inhibitor isomethyl butyl xanthine ( imbx ) or purified pka catalytic subunit all can inhibit germinal vesicle breakdown ( gvbd ) and meiotic maturation in mouse oocytes , also in xenopus oocytes 蛋白激酶a ( proteinkinasea , pka )是依賴于camp的絲蘇氨酸蛋白激酶,是重要的信號傳導途徑之一,廣泛參與許多生命過程,包括生長、分化、腫瘤發生、細胞凋亡、細胞周期調控等。以小鼠卵母細胞為實驗對象,給予pka激動劑camp 、 8 - br - camp或磷酸二酯酶抑制劑imbx ( isomethylbutylxanthine )均可抑制小鼠卵母細胞的胚泡破裂及減數分裂成熟。

Second , carbon nanotube ( cnt ) was used in the fabrication of xanthine oxidase ( xod ) biosensor . xod / cnt / gc electrode was fabricated . the influences of cnt , ph and scan rate to the electrode were discussed 系統地研究了ph 、掃速對hrp酶電極電化學性能的影響,優化了電極的制備條件,實現了hrp酶電極對h2o2的響應,并考察了電極的穩定性。

Drugs that block some activities of the enzyme , known as xanthine oxidoreductase ( xor ) , might therefore offer a novel antiobesity therapy designed to fight fat before it even forms , the researchers said 研究人員說,像黃嘌呤氧化還原酶( xor )等已知的阻止酶活性的藥物,可能因此提供一種新的在肥胖形成前來對抗它的抗肥胖療法。

Tea contains , in addition to caffeine , small amounts of two other methyl xanthines , theobromine and theophylline , 3 , 7 - dimethy1 and 1 , 3 - dimethy1 xanthine , respectively 茶除了含咖啡因以外,還含有少量的另外兩種甲基黃酮嘌呤,即可可堿和茶堿,它們分別是3 , 7 -二甲基黃嘌呤和1 , 3 -二甲基黃嘌呤。

Tungstate competitively inhibits the utilization of molybdenum for the formation of xanthine dehydrogenases . 鎢酸鹽競爭性地抑制鉬的利用以形成黃嘌呤脫氫酶。