甲基嘌呤 的英文怎麼說
中文拼音 [jiǎjīlíng]
甲基嘌呤
英文
methylpurine-
Rat cumulus - enclosed oocyte ( ceo ) and denuded oocyte ( do ) both spontaneously resume meiotic maturation in vitro, when cultured for 2h, the germinal vesical breakdown percentage of do reaches up to 88 %, and ceos get 53 %. oocytes begin to extrude first polar body 1 ( fb1 ) when cultured for 8h. mouse oocyte spontaneous maturation in vitro can be inhibited by 4mm hypoxanthine ( hx ) or 25um 3 - isobutyl - methylxanthine ( ibmx ). while, 4mm hx can not inhibit the spontaneous maturation of rat oocyte, and the lowest effective concentration of ibmx to inhibit rat oocyle spontaneous maturation in vitro is 50um. treated with the same concentration of ibmx, gvbd percentage of rat ceo is lower than that of do, the results indicat that cumulus cells delay rat oocyte spontaneous maturation and potentate the inhibition effect of ibmx, but it ' s not the case on mouse
Ceo和do培養8h時都開始排出pb1 ；在卵母細胞成熟抑制模型中， 4mm次黃嘌呤（ hx ）和25 m的異丁基甲基黃嘌呤（ ibmx ）是小鼠卵母細胞成熟的有效抑制劑，但4mm的hx抑制大鼠卵母細胞成熟效果不理想，用hx - m199和hx - mem培養24h ， gvbd率分別為61 ， 81 ，而ibmx有效抑制大鼠卵母細胞自發成熟的最小濃度為50 m ， ibmx可以降低大鼠ceo和do的gvbd率，但ceo中的卵母細胞gvbd率要顯著低於do的gvbd率， 100 m的jbmx處理24h后，大鼠ceo和do的gvbd率分別為24 ， 84 ，提示卵丘細胞的存在可以延遲大鼠卵母細胞的自發成熟，有助於抑制卵母細胞成熟，但在小鼠上ceo和do的自發成熟差異不明顯。Fda approes methotrexate, an anti - metabolite deried from folic acid, and 6 - mercaptopurine as anti - cancer drugs
Fda批準葉酸衍化的抗代謝藥甲氨蝶呤和6 -巰基嘌呤作為抗癌藥物Fda approves methotrexate, an anti - metabolite derived from folic acid, and 6 - mercaptopurine as anti - cancer drugs
Fda批準葉酸衍化的抗代謝藥甲氨蝶呤和6 -巰基嘌呤作為抗癌藥物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。Using molecular imprinting method, the 1, 3 - dimethylxanthine theophylline, tho molecular recognition membranes, containing an segments as membrane formation sites and aa segments as functional sites, were prepared by the phase inversion technique. here, tho was selected as a template molecule. the hydrogen bonding between aa segments and the tho templates was measured by ft - ir and nmr. the tho templates can be removed from the membrane through washing with acetic acid aqueous solution. the permeation of tho through the membranes is far more than that of 1, 3, 7 - trimethylxanthine caffeine, caf, which demonstrated the function of tho molecular recognition of the membrane. the results also show that the increase of the tho templates concentration in the cast solution caused an increase of tho amounts taken into the copolymer membrane
Ft - ir及nmr測試結果表明：制備的高分子膜中， tho模板分子和膜中的丙烯酸功能殘基存在著氫鍵鍵合作用。大量的極性醋酸水溶液可抽出膜中的模板分子。 tho溶液和與模板分子具有相似結構的1 ， 3 ， 7 -三甲基黃嘌呤咖啡因， caf溶液的基質透過實驗結果：進入膜結構中tho分子的量遠大於caf分子，這表明制備的高分子膜具有tho分子識別功能。Monofunctional alkylating agent n - methyl - n ' - nitro - n - nitrosoguanidine ( mnng ) is a widely spread environmental mutagen and carcinogen that targets dna and proteins to generate adducts. among the adducts, o6 - alkyl guanine is the predominant mutagenic lesion because of its mispairing properties, which can eventually lead to chromosomal aberrations, point mutations, and cell death. this lesion also appears to be involved in tumor initiation, particularly in gastric carcinogenesis
單功能烷化劑n -甲基- n -硝基- n -亞硝基胍（ mnng ）是一種在環境中廣泛存在的化學誘變劑和致癌劑，它能和dna及蛋白質等生物大分子形成加合物（ adduct ） ，其引起的與突變有關的主要dna損傷類型是o ~ 6 -甲基鳥嘌呤，這種損傷與腫瘤尤其是胃癌的發生密切相關。Mms, a kind of dna - damaging agent, predominantly methylates ring nitrogens of pyrine, leading to dna double - strand breaks, point mutation and so on
甲磺酸甲酯（ methylmetbanesulfonate ， mms ）是一種能夠損傷dna的烷化劑，主要使dna嘌呤堿基上的o 、 n甲基化，造成dna雙鏈斷裂、點突變。Effects of 6 - dimethylaminopurine on the parthenogenetic development of bovine oocytes
二甲氨基嘌呤對牛卵母細胞孤雌發育的影響In addition to blood formation, vitamin b12 is also involved in the biosynthesis of methyl groups, and thus, has an indirect but strong impact on the synthesis of purine and pyrimidine nucleotides, which are parts of nucleic acids, the building blocks of dna
除了造血所需，維生素b12也叄與甲基的生合成，因此間接也對嘌呤嘧啶等核酸成分的合成有重大影響。分享友人