普氏野马与亚洲野驴、斑马的头骨比较

根据国内唯一的一例普氏野马头骨与亚洲野驴、斑马进行了比较。     

植物纤维复合板生产线设计分析

本文介绍了我院研制的一年生植物纤维复合板材生产流水线的设计分析,论证了该生产流水线的合理性,提出了进一步改进、完善的措施。     

用CIS理论估算三元熔盐相图

用共形离子理论(CIS)计算了若干三元熔盐相图,其中一个体系在一定范围内改变了原始参数的数值(m.p.-5K,Teut-5K,△H°-10%)以考察原始参数中测量误差对相图计算精度的影响。结果表明,所用的方法具有一定的自适应能力,可以利用少量的原始参数较好地预报三元共晶型熔盐相图。     

坛紫菜(Porphyra haitanensis)叶状体细胞对4种有机溶剂的敏感性比较

分析了坛紫菜叶状体细胞对甲醇、乙醇、异丙醇、1，3-丙二醇等4种有机溶剂的敏感性．结果表明：体细胞对1，3-丙二醇敏感．在实验最低剂量(0．2μL／mL)下对紫菜体细胞就表现出较强的致死作用；对甲醇有较强的耐受性．在最高的1．0μL／mL处理浓度组．生长发育状况与对照组无明显差别；乙醇在浓度高于0.6μL／mL时强烈抑制体细胞的分裂；异丙醇随着浓度的升高表现出使体细胞向细胞团方向分化．而叶状体的形成则受到抑制．本实验结果表明．在用外源化合物处理紫菜叶状体细胞时．甲醇在1．0μL／mL浓度范围内可作为合适的有机溶剂。     

^40Ar-^39Ar geochronology of Cenozoic Linzizong volcanic rocks from Linzhou Basin, Tibet, China, and their geological implications

Whole-rock and mineral separate Ar-Ar dating was carried out for the Linzizong volcanic rocks at Linzhou Basin in Tibet to constrain the time span of volcanism and the corresponding stratigraphic sequence. Sampling was based on detailed geologic mapping and stratigraphic sequence of Dianzhong, Nianbo, Pana Formations, systematically from the bottom to near the top. The results indicate that the Linzizong volcanic rocks erupted from Paleocene to middle of Eocene (64.43--43.93 Ma). Among them, the Pana Formation formed from ca. 48.73 to 43.9 Ma, the Nianbo Formation around 54 Ma and the Dianzhong Formation from 64.4 to 60.6 Ma. In combination with evidence from the geochemical characteristics of the volcanic rocks, and from stratigraphy in southern Tibet, it is postulated that the age of the lowest member in the Dianzhong Formation of the Linzizong volcanic rock, which overlies unconformably the Late Cretaceous Shexing Formation, likely corresponds to the inception of the collision between Indian and Asian continents in southern Tibet.     

Chiari畸形或/和脊髓空洞病人的SEPs变化模式和临床意义

以南京大学医学院1997年7月至2003年3月间收治的70例Chiari畸形／脊髓空洞症患的体感诱发电位的变化，探讨体感诱发电位在该病早期的诊断价值，对70例患进行双侧上下肢正中神经和胫后神经体感诱发电位检测．70例患中胫后神经SEPs检查有24例(34．3％)异常，其中Chiari畸形组2例，脊髓空洞组7例，Chiari畸形伴脊髓空洞组15例,70例患中正中神经SEPs检查有15例(21．4％)异常，其中Chiari畸形组1例，脊髓空洞组4例，Chiari畸形伴脊髓空洞组10例，胫后神经SEPs检查较正中神经SEPs更为敏感．常规SEPs能反应深感觉障碍，提示疾病的病损程度，但对Chiari畸形／脊髓空洞的早期诊断帮助不大。     

青少年特发性脊柱侧凸的骨密度变化及与血清IL-6浓度关系的研究

研究青少年特发性脊柱侧凸的骨密度变化及与血清IL-6浓度关系。选择特发性脊柱侧凸患者36例,男性6例,女性30例,年龄12～18岁,Cobb角34°～109°,且均为胸弯者;36名同年龄段正常青少年为对照,男性7例,女性29例,年龄13～18岁。应用双能X线骨密度吸收仪分别对其腰椎(L2-L4)和股骨近端(股骨颈、大转子、Ward’s 三角)的骨密度进行测量,并用酶联免疫吸附试验检测血清中IL-6水平。结果显示特发性脊柱侧凸患者的腰椎(L2-L4)和股骨所测的3个部位的骨密度均明显低于正常对照组(P<0.001),血清IL-6水平与正常对照组相比明显升高(P<0.005),且特发性脊柱侧凸的腰椎和股骨所测的3个部位的骨密度变化与血清IL-6浓度呈明显负相关(P<0.001),而正常对照组腰椎及股骨所测的3个部位的骨密度变化与血清IL-6浓度无明显相关性(P>0.05)。青少年特发性脊柱侧凸患者存在着骨密度的降低,且细胞因子IL-6过量分泌,此可能是引起特发性脊柱侧凸低骨量的重要因素之一。     

Assimilation analysis of Rammasun typhoon structure over Northwest Pacific using satellite data

The kinetic and thermodynamic structure of typhoon Rammasun (No. 0205) over the Northwest Pacific has been analyzed, using NOAA-16 polar orbiting Advanced Microwave Sounding Unit (AMSU) data collected on 2 July, 2002. The three-dimensional variational (3DVAR) assimilation technology is used to assimilate the satellite observation. The results show that the characteristics of the 3D typhoon structure can be more reasonably described from the assimilated data. The warm-cored structure of the typhoon is enhanced in the analyzed field, which corresponds to strong typhoon. The typhoon cyclonic circulation in the middle and lower layers is apparently strengthened, and the strong anticyclonic circulation appears at the top of the typhoon. The water vapor and its supply in the typhoon are enhanced. The microwave assimilation data may be used to supply the lack of the conventional observation data over the tropical ocean.     

采石场大气环境影响评价问题研究—以广东东莞某采石场为例

以广东东莞某采石场为例，对采石场环境影响大气污染物扩散模式、扩散参数及源强的确定进行分析研究．结果表明，确定采用的方法是可行的，预测结果与现状实测值相吻合．     

菠菜中高活性高等电点的乙醇酸氧化酶同工酶纯化方法的改进

通过缩短DEAE-celluloses柱长度,提高其洗脱液pH,可快速地从菠菜绿叶中纯化得到乙醇酸氧化酶同工酶,证实其具高活性113.0 U/mg·min和高等电点(pI)10.6.纯化后产率为0.14％,纯化倍数为66.5.经SDS-PAGE和毛细管电泳(CE-SDS)均只有40kD单带,说明已纯化至电泳纯.