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Molecule modification and mass deposition induced by the implantation of low energy Fe^+ ion beams into amino acids

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Chinese Science Bulletin 2002年第8期47卷 672-676页

作者： YUAN Shibin wei zengquan GAO Qingxiang Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China College of Bio-Sciences Lanzhou UniversityLanzhou 730000China

Fe+ ion beams with the energy of 110 keV were implanted into films of L(+)-cysteine (HSCH2CH(NH2)COOH). One of the single crystals grown in hydrochloric acid solution with the implanted samples through slow evaporation was structurally characterized by the X-ray crystallography. The crystal is monoclinic, space group C2, with a = 1.8534(4) nm, b=0.5234(1) nm, c = 0.7212(1) nm, β=103.722°, V = 0.67965(3) nm3, Z = 4, F(000) = 144.0, Dclac = 1.763 g·cm-3, μ (MoKa) = 1.06 mm-1, T = 293(2) K.R = 0.0379, wR = 0.0835 for 660 observed reflections (I>2σ(I)). The structural formula of the crystal compound is (CH2CH(NH2)NO2)ClFe (Mr = 180.38u). Products of heavy ion beam irradiation were purified and it was directly confirmed that the implanted Fe+ ions had been deposited in the novel molecules. The same doses of Fe+ ion beams of the same energy were implanted into films of L(+)-cysteine hydrochloride monohydrate. FTIR spectroscopy of the implanted samples proved that some of the original molecules were

关键词： L(+)-cysteine low energy Fe+ ion beams mass deposition molecule modification single crystal the X-ray diffraction infrared spectroscopy.

Analysis of products of thymine irradiated by ^(18)O^(8+) ion beam in N_2O saturated aqueous solution

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Nuclear Science and Techniques 1999年第3期10卷 180-183页

作者： CAI Xichen wei zengquan LI Wenjian LIANG Jianping LI Qiang (Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000) Institute of Modern Physics Chinese Academy of sciences Lanzhou 730000 China

Some methods of capillary gas chromatography, such as GC, GC-MS,GC-FT-IR, are used to analyze the products of thymine irradiated by 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-IR some molecular structure information of products can be obtained. By this way the products,5,6-Dihydrothyndne, 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 them from samples. Though these products are as same as those products of thymine irradiated by γ rays in N2O saturated aqueous solution, the mechanism of thymine irradiated by heavy ion beam in aqueous solution is different from that by γ rays. The main products of thymine irradiated by 18O8+ ion beam in N2O saturated aqueous solution are hydroxyl adducts at 5-6 band of thymine, while the main products of thymine irradiated by γ ray in N2O saturated aqueous solution are dimers of thymine.

关键词： ^18O^8+离子束辐照胸腺碱 N2O饱和水溶液

Rotary　System　of　Loading　Cells　for　Improving　Heavy　Ion　Irradiation　Uniformity

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IMP & HIRFL Annual Report 1996年第1期 74-75页

作者： Li Wenjian wei zengquan and Xie Hongmei

ＲｏｔａｒｙＳｙｓｔｅｍｏｆＬｏａｄｉｎｇＣｅｌｌｓｆｏｒＩｍｐｒｏｖｉｎｇＨｅａｖｙＩｏｎＩｒｒａｄｉａｔｉｏｎＵｎｉｆｏｒｍｉｔｙ￥ＬｉＷｅｎｊｉａｎ；ＷｅｉＺｅｎｇｑｕａｎａｎｄＸｉｅＨｏｎｇｍｅｉＳｅｖｅｒａ... 详细信息

ＲｏｔａｒｙＳｙｓｔｅｍｏｆＬｏａｄｉｎｇＣｅｌｌｓｆｏｒＩｍｐｒｏｖｉｎｇＨｅａｖｙＩｏｎＩｒｒａｄｉａｔｉｏｎＵｎｉｆｏｒｍｉｔｙ￥ＬｉＷｅｎｊｉａｎ；ＷｅｉＺｅｎｇｑｕａｎａｎｄＸｉｅＨｏｎｇｍｅｉＳｅｖｅｒａｌｃｈａｒａｃｔｅｒｉｓｔｉｃｆｅ...

关键词： System Uniform

Genomic polymorphism in consecutive generation rice plants from seeds on board a spaceship and their relationship with space HZE particles

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Frontiers in Biology 2007年第3期2卷 297-302页

作者： LUO Yi WANG Xujie MEI Mantong ZHUANG Chuxiong ZHOU Feng wei zengquan XIE Hongmei YAO Juan ZHAO Junliang College of Life Science South China Agricultural UniversityGuangzhou 510642China Institute of Modern Physics Chinese Academy of ScienceLanzhou 730000China

Dry rice seeds(Oryza sativa,subspecies indica)were sandwiched between nuclear track detectors,aboard the Chinese spaceship Shenzhou-3 for seven *** seeds were recovered and the genomic polymorphism in 201 plants developed from these seeds was studied using random amplified polymorphism DNA *** compared with plants from ground-based control seeds,the genomic polymorphic bands were amplified in 30.2%of the plants from the seeds exposed in *** results for sequencing and SNP analyses of the polymorphic bands verified the single nucleotide variations in these *** poly-morphisms in the consecutive generations of individual plants of the seeds from space were also *** seeds receiving hits of HZE(high atomic number and high energy)particles from space were selected for further analyses and variable genomic polymorphisms were detected in all plants that developed from these *** them,the embryos of three seeds were hit at least once,and mutants with significant changes in agronomic traits were only found in later generations of these *** result implies that the HZE particles of space are effective in inducing the changes of plant genome of inherited phenotypes.

关键词： Rice seeds Genomic polymorphism On board spaceship HZE particles in space