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2008年  第25卷  第2期

核物理
关于软坡密子可能的胶子球本质(英文)
武青, 周丽娟, 马维兴, #
2008, 25(2): 97-106. doi: 10.11804/NuclPhysRev.25.02.097
摘要:
通过把坡密子与观察到的量子数为 IGJPC=0+2++的同位旋张量介子联系起来的思想, 研究了坡密子的胶子内涵。 有4个由胶子组成的这样的介子都满足坡密子自旋与质量的关系。 这些坡密子的候选者可能是混杂态。 它们其中之一 f2(2 220)介子可能包含着最大的胶子球成分。 阐明了实验上还不清楚的关于这个介子宽度的问题, 并给出了它的理论下限。 也说明为什么这个介子没有在p实验中发现的原因。 We study the gluonic content of the Pomeron through relating the Pomeron trajectory to the observed IGJPC=0+2++ isoscalar tensor mesons. Four of these mesons satisfy the spinmass relation of the Pomeron. These Pomeronian candidates may be hybrid states. One of them, the f2(2 220) meson, can have a predominant glueball component. We address the unsettled experimental situation about the width of this meson and give a theoretical lower bound for it. We also show why this meson has not been seen in p experiments.
宏观微观模型对重核区原子核基态性质的研究
彭金松, 李璐璐, #, 周善贵, 赵恩广
2008, 25(2): 107-111. doi: 10.11804/NuclPhysRev.25.02.107
摘要:
利用连续介质模型并基于Nilsson模型考虑微观修正, 研究了重核区原子核( Z≥82)基态性质, 得到了较好的结果。 通过拟合 Z≥82原子核的结合能实验数据, 得到了两组连续介质模型的新参数。 利用这两组参数计算的重核结合能与实验值的均方根偏差约为0.8 MeV, 电荷半径的均方根偏差约为0.07 fm。 The continuous medium model with shell correction from Nilsson model is used to study the ground state properties of heavy nuclei (Z≥82). New parameters are obtained for the continuous medium model by fitting the experimental binding energies. The theoretical calculations for the masses and radii are in good agreements with experimental values, and the rootmeansquare deviations are about 0.8 MeV for the masses, and about 0.07 fm for the radii.
稀土区对关联经验参数公式的研究
郭锋亮, 郭建友, 王士虎
2008, 25(2): 112-116. doi: 10.11804/NuclPhysRev.25.02.112
摘要:
在相对论平均场理论框架下, 采用不同对关联的参数公式对Ce, Gd和Yb稀土区同位素链进行了计算和研究。 理论计算表明: 尽管采用能隙经验参数公式和对力强度经验参数公式在能否表现出原子核的壳结构上有所区别, 但具体计算的其它物理量(如结合能、 双中子分离能等)趋向一致, 都能很好地反映原子核的基态性质。 In the framework of relativistic mean field (RMF)theory, we use BCS approximation to calculate Ce, Gd and Yb isotopic chains with different pairing parameters. And found whether they can show shell structure are different, but other physical quantities are similar by using different kinds of pairing parameters, both can correctly reproduce the experimental binding energies, twoneutron separation energy and potential curves.
轻核区双中子滴线核的研究
圣宗强, 郭建友
2008, 25(2): 117-122. doi: 10.11804/NuclPhysRev.25.02.117
摘要:
运用形变相对论平均场(RMF)理论系统地研究了轻核区的元素O, Ne, Mg, Si, S, Ar和 Ca及Ni。 计算了这8个元素的偶偶核基态的一些性质, 如结合能、 四极形变、 平均每核子结合能以及双中子分离能等。 计算中采用了NL3参数组, 并用BCS方法处理对关联。 限于篇幅, 文中只给出O和Mg元素的计算结果。 RMF理论计算的结果和实验值基本一致。 从双中子分离能的分析可知, RMF理论计算的各元素的双中子滴线核分别为 30O, 38Ne, 42Mg, 52Si, 54S, 60Ar, 80Ca和98Ni。 最后简单讨论了Ca和Ni同位素中的中子幻数情况。 The ground state properties of eveneven O, Ne, Mg, Si, S, Ar, Ca and Ni isotopes were studied with the selfconsistent deformed relativistic mean field theory with NL3 parameter set. The calculated results of O and Mg isotopes were presented in detail. The calculated binding energies and the twoneutron separation energies were in good agreement with experimental values. By examining the twoneutron separation energies, it was suggested that 30O, 38Ne, 42Mg, 52Si, 54S, 60Ar, 80Ca and 98Ni are the twoneutron drip line nuclei. We also briefly discussed the possible changes of neutron magic numbers in Ca and Ni isotopes. Key words: relativistic mean field; drip line nucleus; twoneutron separation energy
加速器
超导螺线管的冷铁轭优化
李青, 马力祯, #, 何源, 吴巍, 卞文龙, 姚庆高
2008, 25(2): 123-128. doi: 10.11804/NuclPhysRev.25.02.123
摘要:
介绍了超导螺线管的冷铁轭优化设计方法, 即采用均匀设计结合有限元软件Opera作为试验手段进行研究。 对该方法进行了举例说明, 并得到物理量与参数之间的关系式, 并验证了关系式的精度, 以此证明此优化方法的可行性。 A method of studying the effect about cold yoke on the superconducting solenoid is introduced in this paper. In this method the uniform design table was used to arrange experiments. And then these experiments were executed by OPERA software package. Finally, the results were analyzed by the Stepwise Regression Analysis. An example according to the method is described and the reliability of this method is also proved.
核技术
上海激光电子γ源
潘强岩, 徐望#, 陈金根, 郭威, 范功涛, 阎喆, 徐毅, 王宏伟, 王呈斌, 陆广成, 徐加强, 徐本基, 马余刚, 蔡翔舟, 沈文庆
2008, 25(2): 129-134. doi: 10.11804/NuclPhysRev.25.02.129
摘要:
激光具有高强度、 高极化度等优异的性能。 用激光束轰击高能电子束就可以产生高强度、 高极化度的γ射线束。 上海激光电子γ源就是上海同步辐射装置上的这样一条束线站。 预计可以获得能量范围为1—22 MeV的准单色、 高强度(109—1011 s-1)和高极化度(线极化或圆极化)的γ射线束。 介绍了这条束线站目前的进展情况。 Shanghai Laser Electron Gamma Source (SLEGS) is a highintensity,short pulse and compact γray source which is based on inverse Compton scattering via interaction between pulsed highpower laser beams and picosecond relativistic electron bunches. One of the attractive features of the laser Compton scattering is the easy control of polarization of the produced high energy photons that duplicates polarization of the applied laser beam. The γ ray with energy up to 22 MeV and intensity of 109—1011s 1 are expected to be produced by Compton backscattering of CO2 laser photons on the 3.5 GeV electrons bunches in the Shanghai Synchrotron Radiation Facility (SSRF). In this communication, we report same simulation results and the progressing status of SLEGS.
百太瓦飞秒激光驱动复合靶产生质子的特性研究
唐翠明, 谷渝秋, 周志坚, 洪伟, 王剑
2008, 25(2): 135-138. doi: 10.11804/NuclPhysRev.25.02.135
摘要:
在SILEX-I激光装置上实验研究了超强超短激光与Au/CH复合靶相互作用中在靶背法线方向发射的质子束的空间分布特征。 保持复合靶前表面的Au厚度不变,质子束流随着后表面的C8H8层厚度的增加而减小, 同时质子空间分布呈现环状、成丝和圆盘状分布。 实验没有发现高于2.75 MeV的高能质子产生。实验进一步完善了超短超强激光等离子体相互作用的物理模型。Proton beam behavior at the normal direction of the rear surface of the target produced from ultraintense short pulse laser irradiated Au/CH double layers targets was explored on SILEXI laser facility. With the same thickness of Au layer,the proton beam flux decreases with the increasing of CH layer thickness,and the corresponding spatial profile of proton beam shows ring, filament,and disc like distribution. The energy of proton beam was not beyond 2.75 MeV in our experiment.
数值模拟快中子针孔成像系统的PSF
唐世彪, 马庆力, 邹继伟
2008, 25(2): 139-143. doi: 10.11804/NuclPhysRev.25.02.139
摘要:
采用蒙特卡罗方法对中子针孔成像系统进行了点扩展函数(PSF)的模拟研究, 利用高斯拟合的数学方法分析比较了几种不同条件下该系统的PSF。 研究结果表明, 在偏离量较小时, 利用高斯拟合得到的中子针孔成像系统的PSF是可行的, 而采用挡板可以很显著地减少拟合误差和提高其空间分辨率。
The point spread function (PSF) of a pinhole imaging system for fast neutron has been studied through MonteCarlo method. The PSFs under different conditions have been obtained and analyzed by fitting the simulating data with Gauss function. As the results show, when the excursion is little, the PSF obtained by Gauss function fitting is feasible. A baffle will reduce the error and improve the spatial resolution remarkably.
交叉学科
He注入单晶Si表面形貌的变化研究
李炳生, 张崇宏, , 杨义涛, 周丽宏
2008, 25(2): 144-147. doi: 10.11804/NuclPhysRev.25.02.144
摘要:
沿Si的(100)面注入He离子, 能量为30 keV、 剂量为5×1016 ions/cm2。 注入后样品切成几块, 在真空炉中分别做退火处理, 退火温度从600 ℃到1 000 ℃, 退火时间均为30 min。 利用原子力显微镜研究了各个样品表面形貌的演化。 发现样品表面形貌与退火温度相关联。 假设在气泡中He原子与空位的比值很高, 导致样品内部存在高压的He泡, 从而使样品表面形貌发生变化。 探讨了在Si中He泡随退火温度的演化和He原子在材料中的释放机制及其对表面的影响。
重离子辐照对人肝癌HepG2细胞蛋白质组图谱的影响
吴庆丰, 李强, #, 金晓东
2008, 25(2): 148-153. doi: 10.11804/NuclPhysRev.25.02.148
摘要:
分别制备经1 Gy C离子辐照和未经辐照人肝癌HepG2细胞的总蛋白样品, 采用固相pH梯度双向凝胶电泳技术进行蛋白分离, 用ImageMaster 2D双向电泳凝胶图像分析软件分析数字化图谱。 结果显示, 差异表达的蛋白质点为17个, 其中1个仅在未经C离子辐照的HepG2细胞中表达, 8个蛋白质点在辐照后的细胞中表达上调, 8个蛋白质点在辐照后的细胞中表达下调。 建立了重复性较好和分辨率较高的分离HepG2细胞总蛋白的双向电泳技术。 实验结果表明, C离子辐照HepG2细胞后其蛋白质组发生了改变。
模体厚度对MC程序计算速度与效率的影响研究
林辉, 陈冬颖, 吴东升, 李国丽, 景佳
2008, 25(2): 154-159. doi: 10.11804/NuclPhysRev.25.02.154
摘要:
基于蒙特卡罗(MC)程序MCNP4c, DOSXYZnrc, DOSRZnrc 和DPM, 考察了模体厚度变化对MC程序计算速度和MC效率的影响, 发现模体的厚度变化对不同MC程序速度提升的影响差异较大, 其中DOSXYZnrc 提升最多, DOSRZnrc提升最小。 从MC效率方面来讲, DPM和DOSRZnrc具有明显的优势。 就4个程序而言, 薄模体均表现出一定的MC 效率优势。 从MC 效率提升角度来看, MCNP4c, DOSXYZnrc和DOSRZnrc表现出一定的相似性, 而DPM相对低些。 也对DOSRZnrc异常的统计不确定性特征、 速度提升进行了研究, 发现其内部植入的光子强迫方差减小技巧在降低体元统计不确定性的同时, 也削弱了薄模体的速度优势。 但是由于显著影响了方差, 所以总体来讲, 仍然提高了DOSRZnrc薄模体的MC 模拟效率。
2007年离束专栏
中国科学院近代物理研究所重离子辐照生物研究平台
肖国青, 宋明涛, 李文建, 刘杰, 王菊芳
2008, 25(2): 161-164. doi: 10.11804/NuclPhysRev.25.02.161
摘要:
介绍了中国科学院近代物理研究所和兰州重离子加速器国家实验室的重离子加速器辐照生物研究平台、 重离子辐照生物研究发展规划及在现代农业和生物产业方面取得的一些最新进展。 Heavy-ion accelerator facilities for the researches on biological effects induced by heavyion at Institute of Modern Physics(IMP), Chinese Academy of Sciences and National Laboratory of Heavyion Accelerator in Lanzhou(HLHIAL) are introduced. New progresses in modern agriculture and biological industry are presented.
重离子束辐照育种研究进展及发展趋势
周利斌, 李文建#, 曲颖, 李萍
2008, 25(2): 165-170. doi: 10.11804/NuclPhysRev.25.02.165
摘要:
相对于低能离子束生物学, 中能重离子束对植物的诱变效应介绍较少。 从机理上综述了中能重离子束辐照诱变技术的优点, 简要介绍了粮食作物、 经济作物及模式植物的重离子束辐照育种的现状, 最后从转基因、 分子辅助标记及航天育种等方面对重离子束辐照育种的发展趋势进行了展望。 In recent years, the intermediate energy heavy ion biology has been concerned rarely comparing to that of the lowenergy ions. In this paper, we summarized the advantage of a new mutation breeding method mediated by intermediate energy heavy ion irradiations. Meanwhile, the present state of this mutation technique in applications of the breeding in grain crops, cash crops and model plants were introduced. And the preview of the heavy ion irradiations in genetransfer, molecular marker assisted selection and spaceflight mutation breeding operations were also presented.
水稻植株高矮突变系材料的株高性状与产量等相关性分析
许学, 刘斌美, 章忠贵, 蒋家月, 吴跃进, #
2008, 25(2): 171-175. doi: 10.11804/NuclPhysRev.25.02.171
摘要:
对利用N离子束和γ射线诱变获得的粳稻日本晴和籼稻“9311” 89份株高突变体的株高性状和产量性状进行了相关分析。 结果表明, 株高和水稻的产量与其构成因素: 穗粒数、 结实率、 千粒重以及穗长、 单株茎秆干重有着一定的相关性。 株高与穗长、 穗粒数、 千粒重、 单株茎秆干重、 单株生产力呈极显著的正相关, 与有效穗数呈极显著的负相关。 通过对株高与其他产量结构因素的相关分析, 进一步了解了株高的变异对于水稻经济产量因素的影响。 The total 89 plant height mutant lines induced from rice cultivars Nipponbare and “9311” by ion beam implantation and γrays irradiation were used for analysis of the correlation between plant height and yield component. The results indicated spike length, ear grains, thousandgrain weight, stem dry weight and yield have significantly positive correlation with the plant height, while the number of productive ear has significant negative correlation with it. The correlation analysis of the plant height and yield component will help to reveal the influence of the plant height and the factors of yield component.
不同剂量重离子辐照玉米自交系的生物学效应比较
陈学君, 李文建, 陈婧, 余丽霞, 李杰, 颉红梅, 李唯
2008, 25(2): 176-181. doi: 10.11804/NuclPhysRev.25.02.176
摘要:
12C6+和 36Ar18+离子束分别辐照玉米自交系干种子和浸泡种子, 研究了M1—M3代重离子束辐照的生物学效应。 结果表明: 种子发芽势和发芽率随辐照剂量的增加而下降, 不同生理状态的种子对重离子辐照的敏感性也不同。 一般12C6+ 离子辐照干种子的适宜剂量为20—25 Gy; M1代叶型发生明显的变化, M2代植株在株高、穗位、单株穗数、雄穗花药颜色、粒质、穗行数、粒重和抗性等方面均发生了变化, 并产生了许多有益的变异,包括株高和穗位降低、同位多穗、穗行数和粒重增加、粒质由粉质变为硬粒以及抗锈病和红叶病的植株等, 有益突变的频率达7.0%—17.9%;在M3代出现能够稳定遗传的,并且光合效率增加的有益突变株。由此可见,重离子束辐照是玉米种质改良的一种高效手段。 In order to study biological effects of heavy ion irradiation on maize inbred lines, the agronomic traits and photosynthetic rates were investigated from M1 to M3 of maize seeds irradiated with 12C6+ and 36Ar18+ ions.The results showed that the germination rate and planting percent of maize seeds irradiated were decrease as dosage increasing of heavy ion irradiation. Different physiological status of seeds had disparate sensibility to heavy-ion irradiation and the suitable dosage of 12C6+ ion irradiation was 20—25 Gy for dry maize seeds. The leaf type of the plant happened visible changes in M1 generation. The plant height, spike position, spike number per plant, anther color of staminate,grain texture,spike row,grain weight and resistance had changes in M2 generation. Among them occurred some beneficial mutations that include degrading of plant height and spike position height, multispike at same position in the plant, increasing of pike row and grain change of grain texture from powder seed to hard seed,resistance to rust disease and red leaf disease and so on. The frequency of beneficial mutation was 7.0%—17.9%. Those beneficial mutations could be stably inherited and mutant plants with high photosynthetic efficiency emerged in M3 generation. The study above showed that heavy ion irradiation is a high performance means for improvement germplasm of maize.
12C6+离子辐照对4种农作物种子出苗率
孙兰弟, 张颖聪, 吴大利, 梁凯, 张彦萍, 贾瑞玲, 秦倩倩, 程曦, 钱平平, 李文建, 侯岁稳, #
2008, 25(2): 182-186. doi: 10.11804/NuclPhysRev.25.02.182
摘要:
以能量为80 MeV/u的12C6+离子为诱变源辐照油菜、 胡麻、 大葱和兵豆的干种子后, 研究了不同剂量处理对4种农作物M1和M2代种子出苗率及幼苗生长的影响。 实验结果表明: 重离子所导致的M1代生物学效应因不同的物种而表现出一定的差异, 适当剂量C离子辐照促进了油菜和胡麻M1代出苗率和幼苗的生长; 而不同剂量的C离子辐照抑制了大葱的出苗率和幼苗的生长; 兵豆3个剂量下的出苗率和对照相差很小, 但90 Gy辐照有利于其生长。 到了M2代, 4种作物辐照组的发芽率都低于各自的对照组; 30 Gy剂量下的油菜、 胡麻和兵豆长势最好; 大葱依然是对照的长势最好。 Crops of Brassica napus L., Linum usitatissmum L., Allium fistulosum L. and Lens culinaris Medic. were irradiated by 80 MeV/u 12C6+ ion beams with doses of 30, 90 and 180 Gy. The germination rates and heights of seedlings of M1 and M2 generation of these four plants were studied. The results indicated that germination rates and average heights of the B. napus and L. usitatissmum were improved by appropriate dose treatment, while great suppression was found in the irradiated groups of the A. fistulosum. As far as the L. Culinaris was concerned, little differences was observed on M1 germination rate, but the 90 Gy irradiation was favorable to growth of plant. The treatments with 30, 90 and 180 Gy were inferior to contrast one on M2 germination rate of the four species. Seedlings of M2 generation of the B. napus, L. sitatissmum and L. culinaris under 30 Gy grew better than the other groups, while the best performance of the A. fistulosum was shown by the control group.

马铃薯重离子辐射育种研究
谢忠奎, 王亚军, 颉红梅, 郭志鸿, 卫增泉
2008, 25(2): 187-190. doi: 10.11804/NuclPhysRev.25.02.187
摘要:
在2000—2005年将杂交技术和重离子辐射相结合, 采用55 MeV/u的 40Ar17+离子对马铃薯杂交种子和微型薯进行了不同剂量的贯穿辐射或离子注入处理。 结果表明, 对马铃薯微型薯进行重离子辐射能显著提高块茎的产量。 而杂交技术和重离子辐射相结合是一种更高效的育种方式, 不仅能提高块茎的增产幅度, 还能改善其加工品质。 微型薯重离子辐射的最佳剂量为60 Gy, 杂交种子辐射的适宜剂量范围在60—120 Gy之间。 通过对辐射后代的多年选育, 获得了几个产量显著高于对照、 品质优良的马铃薯新品系。 The effect of 55 MeV/u 40Ar17+ irradiation with different doses on hybrid seeds and microtubers of potatoes were studied from year 2000 to 2005. The results showed that the yields of potatoes irradiated by heavy ions grew significantly. This new mutation method combining cross breeding technique with heavy ion irradiation is more effective, which could not only increase the yield of potatoes, but also improve their quality. The optimal mutagenic dose was 60 Gy to microtubers of potatoes, 60—120 Gy to hybrid seeds, respectively. Finally, several new lines which have higher yield and better qualities were obtained through multigeneration screening from the offspring of irradiated potatoes.

低能离子诱导拟南芥基因组不稳定性的研究
刘萍, 李方华, 徐敏, 卞坡#, 吴跃进, 余增亮
2008, 25(2): 191-195. doi: 10.11804/NuclPhysRev.25.02.191
摘要:
体细胞同源重组产生的DNA重排、 缺失和复制等是基因组不稳定的重要指标, 以拟南芥菜GUS基因重组报告系R2L100和R3L66为实验材料, 以体细胞同源重组频率(每个植株上的GUS斑点数目)作为评估标准, 研究低能Ar+离子和α粒子辐射对植物基因组稳定性的影响。 结果表明: 30 keV的Ar+离子辐照拟南芥干种子, 在500×1013—3 000×1013 ions/cm2剂量范围内, 同源重组频率与对照相比明显升高, 最大值是对照的2.4倍; 3.3 MeV的α粒子辐照萌发4 d后的幼苗, 同源重组频率随着剂量的增加呈先增后降的变化趋势, 最大值是对照的1.9倍, 对应的辐照剂量是10 Gy。 以上实验结果表明, 低穿透能力的辐射能有效增加植物基因组的不稳定性。 α粒子辐照拟南芥菜幼苗的根, 未受到辐照的地上部分的同源重组频率较对照增加2.5倍, 表明低能离子诱导的基因组不稳定信号在植物个体水平是可以长程输运的。 以上结果从另一个侧面解释了低能离子的诱变机制。 The somatic homologous recombination was frequently used to evaluate genome stability because it can result in DNA changes, such as rearrangement, deletion and duplication. In this paper, we used Arabidopsis thaliana transgenic for GUS recombination substrate (R2L100 and R3L66) to study the genomic instability induced by low energy ion and α particle characteristic of shortpenetrating properties. The dry seeds of R3L66 line were irradiated by 30 keV Argon ion, the Homologous Recombination Frequency (HRF) had a significant increase at dose range of 500×1013—3 000×1013 ions/cm2. The highest level of HRF was 2.42fold over the control. The 3.3 MeV α particles were used to radiate 4dayold seedlings of R2L100 line. The HRFs had a dosedependent increase at dose of 1—10 Gy, and a dosedependent decrease at 10—100 Gy. The highest level of HRF induced by α particle was 1.9fold over control at the dose of 10 Gy. These results indicate that shortpenetrating irradiation can effectively trigger the plant genomic instability at the level of plant. The local irradiation on the roots of R2L100 by α particle resulted in a 2.5fold increase of HRF in nonirradiated aerial plant,which indicates that a signal of genomic instability generated by α particle radiation can systemically travel in whole plant. It is possible that the genome instability induced by lowenergy ion is a major part of its mutagenic mechanism.
甘肃当归新品系DGA2000-02的选育研究
颉红梅, 刘效瑞, 李文建, 荆彦明, 郝冀方, 尚虎山, 刘敬, 刘荣清, 何宝刚, 王春明, 张国礼, 陈书珍
2008, 25(2): 196-200. doi: 10.11804/NuclPhysRev.25.02.196
摘要:
当归新品系DGA200002是采用重离子束55 MeV/u 40Ar+15 离子辐照甘肃当归9001干种子, 按新品种选育程序多年选育而成的。 2005—2007年, 在定西市岷县、 渭源县、 漳县、 陇西县等地当归品系区域试验中, 甘肃当归DGA200002平均产鲜当归10 621.5 kg/hm2, 较对照品种(甘肃当归9001)平均增产鲜当归1 386.0 kg/hm2, 增产率15.0%。 生育期790 d, 茎秆深紫色, 根系黄白色。 测定结果: 总灰分4.2%, 酸不溶性灰分0.4%, 分别优于对照品种16%和33.3%; 浸出物61.4%, 较规定指标提高4.4%; 阿魏酸0.148%, 较规定指标提高2.96倍。 质量显著优于对照品种和2005年版《中国药典》规定指标。 适宜在海拔2 000—2 600 m 、 年降水量500—600 mm的二阴及高寒阴湿生态区栽培。 Angelica sinensis(Oliv)Diels new strain DGA200002 was selected successfully by Institute of Modern Physics, Chinese Academy of Sciences, Dryland Farming Research and Extension Center of Dingxi Prefecture, etc. According to the program of new strain selection, this new strain was selected for several years after the dry seeds of Gansu Angelica sinensis(Oliv)Diels 9001 was irradiated by ions of 55 MeV/u 40Ar+15. During the period of year 2005—2007, region experiments of Angelica sinensis(Oliv)Diels new strain DGA200002 were developed in Minxian, Weiyuan, Zhangxian and Longxi etc. Average yield of the fresh DGA200002 Angelica was 10 621.5 kg/hm2, and 15.0% production was increased more than control (for 1 386.0 kg/hm2 of 9001).The growth stage of the DGA200002 was 790 d, and it has deep purple stem and yellowwhite root. The quality analysis results are as follows: total ash content is 4.2% and acidfast ash content is 0.4%, 16% and 33.3% better than control, respectively; the lixivium is 61.4%, i.e., 4.4% more than the standard of Pharmacopoeia of People’s Republic of China (2005 edition); the ferulic acid content is 0.148%, i.e., 2.96 times ligher than the standard. All these results showed that the quality of the DGA200002 was better significantly than both control and the standard. It can be grown appropriately at the high, cold and dankness regions at the altitude of 2 000—2 600 m and with a annual precipitation of 500—600 mm.
当归新品系“DGA2000-02”与对照品种的遗传差异分析
刘敬, 颉红梅, 刘效瑞, 李文建, #, 贾婕楠, 尚虎山, 荆彦明, 刘青芳, 董喜存
2008, 25(2): 201-203. doi: 10.11804/NuclPhysRev.25.02.201
摘要:
当归新品系“DGA200002”是利用兰州重离子加速器研究装置(HIRFL)对“岷归1号”进行重离子束辐照选育出来的。 与岷归1号相比, DGA200002表现出更强的抗病性, 产量也有较大提高。 对这两个品种的表型、 品质及遗传差异进行了系统的分析。 为将来进一步选育产量高、 品质好及抗逆性强的新品种提供研究基础。
利用甜高粱汁培养面包酵母菌的实验研究
王菊芳, 马良, 高峰, 董喜存, 李文建, 肖国青
2008, 25(2): 204-207. doi: 10.11804/NuclPhysRev.25.02.204
摘要:
利用优质甜高粱汁代替粮食进行发酵生产的优越性已经显现, 在此基础上研究了面包酵母在甜高粱汁中的生长情况, 测定了发酵液中酵母菌的生物量、 残总糖等参数, 并在10—100 l的发酵罐中进行了培养优化实验。 结果表明, 甜高粱汁在工业化生产面包酵母菌中具有很大的潜力。As a substitute for food supplies, sweet sorghum juice with high grade has demonstrated outstanding advantage in fermentation. To obtain the optimized fermentation conditions, the growth, the biomass of bread yeast cultured in sweet sorghum juice and total residual sugar were investigated in the paper. The fermentation was performed and optimized in a 10—100 l bioreactor. The results show that the application of sweet sorghum juice in bread yeast production is very potential.