萘乙酸和吲哚丁酸对胡颓子扦插生根的影响

为摸索萘乙酸(NAA)和吲哚乙酸(IBA)有效促进胡颓子扦插生根的最佳处理,以河沙为基质,用不同浓度和不同配比的NAA和IBA溶液处理插穗基部,统计分析不同处理对插穗生根率、生根数、根长及根粗的影响。结果表明,浓度处理上,生根数和根粗均是浓度为100 mg·L~(-1)的处理极显著高于浓度分别为150 mg·L~(-1)、50 mg·L~(-1)和200 mg·L~(-1)的三个处理,后三者间差异不明显;生根率和根长均是浓度为100 mg·L~(-1)和150 mg·L~(-1)的处理显著高于浓度为50 mg·L-和200 mg·L~(-1)的处理,100 mg·L~(-1)的处理和150 mg·L~(-1)的处理间差异不明显。不同配比处理上,根长间差异显著,生根率、生根数、根粗间差异均不显著;生根率和根长、生根数均是IBA及其混合液好于NAA,混合液以6份NAA+4份IBA和5份NAA+5份IBA效果比较好;根粗是NAA及其混合液好于IBA,混合液以8份NAA+2份IBA效果最好。可见,用浓度为100 mg·L~(-1)的NAA和IBA按6∶4或5∶5的比例混合处理胡颓子插条生根效果最佳。     

Investigation of whole blood of SJL/J mice using neutron activation analysis

The Br (0.0022 ± 0.0006 gL⁻¹), Ca (0.113 ± 0.012 gL⁻¹), Cl (3.07 ± 0.36 gL⁻¹), K (2.63 ± 0.14 gL⁻¹), Mg (0.045 ± 0.002 gL⁻¹) and Na (2.09 ± 0.10 gL⁻¹) concentrations were determined in whole blood of SJL/J mice using the Neutron Activation Analysis (NAA) technique. Eleven whole blood samples were analyzed in the IEA-R1 nuclear reactor at IPEN (S?o Paulo, Brazil). These data contribute for applications in veterinary medicine related to biochemistry analyses using whole blood. Moreover, the correlation with human blood estimation allows to checking the similarities for studying muscular dystrophy using this model animal.     

NF处理果树苗木根系对其地上、下部的影响

用ＮＦ处理葡萄、桃、梨、樱桃砧木Ｃｏｌｔ、苹果苗木根系，与适宜的ＮＡＡ处理做比较。结果表明，ＮＦ处理以上苗木根系１２～２４ｈ可极显著地增加根量并促进根的生长，消除根的先端优势，显著或极显著地增进新梢生长，且随苗木生长其作用愈加明显。各种果树适宜的质量浓度分别为葡萄１００ｍｇ／Ｌ，梨２０ｍｇ／Ｌ，桃２０ｍｇ／Ｌ，苹果５０ｍｇ／Ｌ。与同质量浓度的ＮＡＡ（适宜质量浓度）比较，除处理梨苗外，对根及新梢促进作用均好于ＮＡＡ处理。在梨和桃上表现比ＮＡＡ处理适宜浓度范围宽，高浓度在桃和Ｃｏｌｔ上表现比ＮＡＡ毒害作用轻。     

Neutron activation analysis and Mössbauer spectroscopy research on coloring mechanism of Chinese Ru porcelain

The characteristic spectrum and its main wavelength of Ru porcelain glaze are measured by color difference instrument to determine the relations between glaze color and its main wavelength. The content of the 30 coloring elements in Ru porcelain is determined by neutron activation analysis (NAA), which showed that iron is the major coloring element. Mössbauer spectroscopy analysis shows that the iron element in the glaze exists in the form of structural iron (Fe²⁺, Fe³⁺). The quantitative relationship between the main wavelength of glaze in various colors and the relative content of structural iron (Fe²⁺/Fe³⁺) is determined. Thus the coloring mechanism of Ru porcelain is investigated entirely.     

菊花扦插繁殖的研究

报道了菊花的扦插方法和不同浓度的吲哚丁酸（ＩＢＡ）和萘乙酸（ＮＡＡ）对插穗生根的影响．结果表明适宜浓度的ＩＢＡ和ＮＡＡ具有明显的促进插穗生根的作用．其中２５０ｐｐｍ的ＩＢＡ处理效果最好，可将生根率由７５％提高到１００％；将生根时间提前９ｄ左右．同时还讨论了植物扦插过程中的某些问题，为生产实践提供了理论依据     

In vivo relaxation of N-acetyl-aspartate, creatine plus phosphocreatine, and choline containing compounds during the course of brain infarction: a proton MRS study.

Localized water suppressed proton spectroscopy has opened up a new field of pathophysiological studies of severe brain ischemia. The signals obtained with the pulse sequences used so far are both T₁ and T₂ weighted. In order to evaluate the extent to which changes in metabolite signals during the course of infarction can be explained by changes in T₁ and T₂ relaxation times, eight patients with acute stroke were studied. STEAM sequences with varying echo delay times and repetition times were used to measure T₁ and T₂ of N-acetyl-aspartate (NAA), creatine plus phosphocreatine (Cr+PCr) and choline containing compounds (CHO) in a 27-ml voxel located in the affected area of the brain. Ten healthy volunteers served as controls. We found no difference in T₁ or T₂ of the metabolites between the patients and the normal controls. The T₂ of CHO was longer than that of NAA and Cr+PCr. Our results indicate that spectra obtained in brain infarcts and normal tissue with the same acquisition parameters are directly comparable with respect to relative signal intensities as well as signals scaled with internal and external standards.     

夏季不同浓度的NAA对台湾杉扦插苗的影响

本文研究了夏季不同浓度的NAA对台湾杉扦摘苗成活率的影响,结果表明,6、7月份用500ppm的NAA处理扦插苗,成活率最高。     

萘乙酸溶剂效应的静态模拟（英文）

运用量子力学的DFT-B3LYP/6-311+G^**方法,结合极化连续介质模型(PCM),模拟萘乙酸(NAA)的气相结构以及分别在水、乙醇和丙酮溶液中的结构.键长、Mulliken布居和原子电荷的计算结果表明水、乙醇和丙酮都是极性溶剂,使得溶液中NAA的O-H键变弱,酸性增强.在NAA/H₂O、NAA/EtOH和NAA/Acetone体系中,用分子动力学方法模拟NAA羧基氧原子与周围溶剂氢原子之间的径向分布函数和NAA的均方位移.研究结果表明溶质-溶剂分子间的相互作用既有近程作用(氢键作用),也有远程作用(范德华作用).其中NAA/EtOH体系中的作用较强,且以氢键作用为主;NAA/H₂O体系中的作用较弱. NAA在水溶液中的扩散性较小,在乙醇溶液中的扩散性较大.     

Element content and element correlations in Chinese human liver

The amounts of the 19 elements As, Br, Ca, Cd, Ce, Co, Cr, Cs, Fe, K, La, Mo, Na, Rb, Sb, Sc, Se, Sm, and Zn in 92 lyophilized autopsy human liver samples from normal subjects have been analyzed by instrumental neutron-activation analysis (INAA). For intercomparison and quality control ten samples were independently analyzed in two institutes, the Institute of High Energy Physics in China and the Joef Stefan Institute in Slovenia. Most of the element contents determined by the two institutes were in quite good agreement, even though different experimental conditions were applied, indicating the reliability of the analytical results. Analysis of the chemical species of mercury present in the ten liver samples was also performed in Slovenia. Possible differences between the element content of male and female liver samples were studied by means of Students t-test, but significant differences were found only for Ce, Co, Fe, La, Mo, and Zn. The results obtained were also compared with those reported from other areas of the world; no appreciable differences were observed. Correlation among the various elements in the human liver samples was studied using multivariate statistics. It was found that there was relatively close correlation between some elements, for example As–Fe, Ca–Fe, Cd–Co, Cd–Zn, Mo–Zn, Co–Se, Cs–Rb, Br–Rb, Sc–Sm, La–Sm, La–Ce, etc.; these correlations could be rationally explained by the similarity of the electronic structures of the elements and/or their physiological functions in the human body.     

生长调节剂对香石竹茎尖诱导形成芽的影响

将香石竹的茎尖作为外植体，分别接种于添加不同量细胞分裂素（６－ＢＡ或ＫＴ）及生长素（ＮＡＡ）的ＭＳ琼脂培养基上，结果表明，培养基中如果只添加６－ＢＡ或ＫＴ，当两者浓度分别在（０．０１－０．５）ｍｇ／Ｌ和（０．０１－１）ｍｇ／Ｌ时，对芽的产生起促进作用；在大于０．５ｍｇ／Ｌ和１ｍｇ／Ｌ时，则抑制芽的产生，培养基中同时加入ＮＡＡ和６－ＢＡ或ＫＴ，在ＮＡＡＲ 最小于６－ＢＡ或ＮＡＡ和ＫＴ时，利于芽的形成