【摘 要】
:
Some methods of capillary gas chromatography, such as GC,GC-MS, GC-FT-IR, are used to analyze the products of thymine irradiatedby 18O8+ion beam in N2O saturate
【机 构】
:
Institute of Modern Physics
论文部分内容阅读
Some methods of capillary gas chromatography, such as GC,GC-MS, GC-FT-IR, are used to analyze the products of thymine irradiatedby 18O8+ion beam in N2O saturated aqueous solution.From the results of GC-MS the molecular weight of products can be determined, and from the results of GC-FT-IRsome molecular structure information of products can be obtained.By this way the products,5,6-Dihydrothymine, 5-Hydroxyl-5-Methylhydantoin, 5-Hydroxyl-6-Hydrothymine,5-Hydro-6-Hydroxylthymine, 5-Hydroxymethyluracil, Trans-Thymine glycol,Cis-Thymine glycol and dimers are determined without separation of themfrom samples.Though these products are as same as those products of thymineirradiated by γ rays inN2O saturated aqueous solution, the mechanism of thymine irradiated by heavy ionbeam in aqueous solution is different from that by γ rays. The main productsof thymineirradiated by 18O8+ ion beam in N2O saturated aqueous solution are hydroxyl adductsat 5-6 band of thymine, while the main products of thymine irradiated by γ ray in N2Osaturated aqueous solution are dimers of thymine.
其他文献
Interaction between proteins, cells and biomaterial surfaces is commonly observed and often used to measure biocompatibility of biomaterials.In this investigati
Although the native state and the fully unfolded state of proteins have been extensively studied, the folding pathway and intermediates in the protein folding p
现代汉语中,许多词语彼此有相似之处,但是也存在一些区别,稍不注意,很容易出现谬误现象。我们经常会遇到一些滥用的情况,在这里,通过比较分析“出人头地”和“出类拔萃”二者之间的
This paper presents the purification of a monoclonal IgM antibody against human tumor associated antigen Lewis-Y by ion exchange chromatography and gel filtrati
德育在于使人们净化个人的心灵、陶冶个人的情操、培养个人的善良德性;在于团结群众、教育群众,弃旧扬新,从而使人们达到真、善、美的境界。
财务会计是我国现代经济工作中的重要组成部分,随着市场经济的进一步发展,对财务会计人才需求量越来越大。中职学校的主要目标就是培养学生的专业技术技能,所以财务会计教师应当
An analysis using SDS-PAGE of acidic and basic protein fractions extracted from rice seedling treated with salicylic acid (SA) yielded several new proteins, som
随着经济的发展,面临复杂多元的社会环境,青少年的在成长过程中暴露出一系列的问题,犯罪比例不断上升。文章通过对这些现象和案件的反思与分析,指出社会各界必须充分意识到在家庭
Boron is an essential nutrition for higher plants.However, the primary function of boron remains a matter of discussion.Boron may function by forming complexes
目的探讨乳腺癌组织中谷胱甘肽转移酶(GSTpi)的表达与预后的关系。方法用免疫组化方法检测120名女性乳腺癌患者GSTpi的表达情况,并与患者年龄、肿瘤大小、组织学分级、腋淋巴