迷迭香对大强度耐力训练大鼠血清抗氧化酶活性及某些生化指标的影响

以SD雄性大鼠为实验对象,通过建立大强度耐力训练运动模型,研究迷迭香及大强度耐力训练对大鼠血清抗氧化酶活及某些生化指标的影响,结果显示,大强度耐力训练可使大鼠血清中SOD、GSH-Px活性升高,CAT活性下降。服用迷迭香后,不论是安静组还是运动组这3种抗氧化酶活性都明显升高。大强度耐力训练后大鼠的1ib含量稍有下降,迷迭香可以改善这种现象,使大鼠Hb含量明显上升,提示迷迭香能提高有氧运动能力．运动状态下各组血清MDA含量分别低于其相应的安静状态下各组,服用迷迭香的运动、安静组血清MDA含量明显低于其相应的对照组服用迷迭香的大鼠血中肌酐含量明显高于其相应的对照组,说明迷迭香能增加肌肉中肌酸和磷酸肌酸含量,提高肌肉机能水平。     

毛大丁草根水煎剂对受试动物的镇咳、祛痰、平喘作用

目的：观察毛大丁草根水煎剂对受试动物的镇咳、祛痰、平喘作用。方法：采用氨水诱咳法分别观察毛大丁草根水煎剂对小鼠咳嗽次数及咳嗽潜伏期的影响;酚红排泌法检测毛大丁草根水煎剂对小鼠呼吸道酚红排泌量的影响;离体气管法观察毛大丁草根水煎剂对乙酰胆碱（Ach）、组胺（His）诱导的豚鼠离体气管平滑肌收缩的影响。结果：毛大丁草根水煎剂可减少小鼠咳嗽次数、延长咳嗽潜伏期;可增加小鼠呼吸道酚红排泌量;可降低Ach、His诱导的豚鼠离体气管平滑肌的收缩张力。结论：毛大丁草根水煎剂对受试动物具有镇咳、祛痰、平喘作用。     

Synergistic interaction of NaCl and Cd on growth and photosynthetic parameters in soybean genotypes differing in salinity tolerance

The effects of salinity(50 mmol/L NaCl) and Cd(1 μmol/L CdCl2) as sole and combined on growth and photosyn-thetic parameters were studied using two soybean genotypes,Huachun 18 and NGB.The concentrations of Cd2 ,Zn2 ,Ca2 ,Mg2 ,K and Na were also determined in seeds and pods.Huachun 18 suffered a more serious decrease than NGB in net photosynthetic rate(Pn) in the treatments of salinity stress alone and combined stress(NaCl Cd),showing that it is relatively sensitive to salinity.The decrease in Pn caused by salt stress in Huachun 18 was mainly due to the reduced total chlorophyll content and photosynthetic efficiency(the ratio of variable fluorescence to maximal fluorescence,Fv/Fm),whereas the decease in NGB was mainly related to reduced stomatal conductance(Gs).The combined stress of both Na and Cd did not induce further decrease in photosynthesis and fluorescence in the two genotypes relative to salt or Cd stress alone.Greater change in the pod concentrations of Zn2 ,Ca2 ,Mg2 ,K and Na was detected under salt stress for Huachun 18 than for NGB.The results suggested that the interactive effect of NaCl-Cd on growth and nutrient uptake differs between the two soybean genotypes.     

酚酸类物质对大巢菜萌发及幼苗生长的影响

采用不同浓度的两种酚酸类物质及其混合物对大巢菜种子及幼苗进行处理,测定其对大巢菜发芽率、营养生长及其某些生理指标的影响。结果表明,酚酸类物质及其混合物可以显著延缓大巢菜种子发芽所需要的时间,降低最终的萌发率;对大巢菜幼苗的根长度、苗高度及干物质积累有一定的抑制作用;同时,根系活力与叶绿素含量也有不同程度的下降。     

关于转换提单的若干问题探讨

近年来,有关转换提单的争议很多,已引起航运界的普遍关注。本文在分析了转换提单的涵义、功能、对船东的风险以及目前船东办理转换提单程序存在的问题的基础上,对船东如何办理转换提单提出相应的对策和建议。     

国际贸易中信用证"软条款"分析

信用证通常被认为是国际贸易中最安全的支付方式之一,但贸易实践中,“软条款”就像埋伏在信用证中的一颗定时炸弹,随时威胁着出口商的结汇安全。及时识别信用证中的“软条款”,采取必要的预防措施,把收汇风险消灭在萌芽状态,在贸易各环节严格把关,防患于未然,是出口商的最佳选择。     

The comparison of the three assays for determination of fecal calprotectin in inflammatory bowel disease

IntroductionFecal calprotectin is a biomarker for monitoring inflammatory bowel disease (IBD) activity. Our aim, therefore, was to evaluate two new assays, the point of care test Quantum Blue and the Liaison Calprotectin with respect to the Calprest, commonly used assay, and to determine their performance for IBD diagnosis.Materials and methodsWe included 73 prospective patients with IBD. Fecal calprotectin was measured and analysed with the routine Calprest assay and two recently introduced assays, the Quantum Blue and the Liaison Calprotectin. Furthermore, we compared the results by Bland and Altman analysis, and Passing-Bablok regression.ResultsWe observed no difference in median calprotectin values obtained by the Calprest (94.6 µg/g, 95%CI 66.5 to 166.1) and Liaison assay (101.0 µg/g, 95%CI 48.1 to 180.1) whereas significantly higher concentrations were obtained with the Quantum Blue assay (240.0 µg/g, 95%CI 119.9 to 353.2). The mean absolute and relative difference between the Calprest and Quantum Blue methods was statistically significant (- 162.3 µg/g and
- 143.1%). Mean absolute difference between the Calprest and Liaison calprotectin methods was positive (2.2 µg/g). The agreement between assays revealed that Quantum Blue and Calprest have fair agreement with Kappa coefficient of 0.38 (95%CI 0.26 to 0.51). Liaison Calprotectin and Calprest revealed moderate agreement with a weak Kappa coefficient of 0.47 (95%CI 0.32 to 0.62).ConclusionClinicians should be aware of these differences between the assays and avoid comparison of their respective results.     

The sidestep cutting manoeuvre requires exertion of lumbosacral lateral flexion torque to avoid excessive pelvic obliquity

During sidestep cutting, the pelvis is supported only on one side; this affects the athlete’s posture. This study investigated the mechanism to avoid excessive pelvic obliquity during sidestep cutting. Ten physically active men performed sidestep cutting with maximal effort, and we captured the kinematics and kinetics with force platforms and an eight-camera motion capture system. Our results indicated that the stance hip exerted little abduction torque; however, lumbosacral lateral flexion torque was exerted towards the free-leg side (peak value: 3.39 ± 0.91 N m/kg). Although bilateral hip joint forces acted to drop the free-leg side of the pelvis, the net torque around pelvic elevation/drop axis was nearly zero during the entire stance phase and the change in the angular momentum around the pelvic elevation/drop axis from touchdown to toe-off was negligible (?0.004 ± 0.003 N m s/kg). The integrated components of lateral flexor for elevating the free-leg side of the pelvis (0.220 ± 0.072 N m s/kg) were significantly larger than any other integrated components, which were all negligible (<0.010 N m s/kg). Thus, sidestep cutting requires the lumbosacral lateral flexion torque exertion to neutralise the passive action that drops the free-leg side of the pelvis.     

活性碳在半夏组织培养中的使用

在半夏成熟叶片的初代培养中,使用０．２５￣０．５％的活性碳对材料褐变有抑制作用;而加入活性碳对半夏试管苗的伸长有促进,但不同浓度差异不显著;０．０５￣０．２５％的活性碳能降低半夏玻化苗率,１％的活性碳则对苗的生长有抑制。     

离体玉米芽尖中酚类物质产生的影响因素

玉米芽尖分生组织培养过程中,酚类物质的产生与培养芽尖的基石莳背景明显相关,培养基的Ｐ迂低或过高均会加剧芽尖的酚类物质产生。蔗糖浓度在２０￣４０％范围内变化和使用活性炭对芽尖产生酚类物质的影响不明显。