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51.
R. Romand M. Dauzat 《Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale》1982,45(1-2):265-268
Summary The spontaneous activity of primary vestibular neurons was studied during postnatal development in the cat. Activities were categorized as regular, intermediate and irregular on the basis of the coefficient of variation. At birth, few regularly firing units were found while the percentage of intermediate and irregular units was high. During development, the percentage of units meeting the criterion of regularity increased steadily with age. At the same time the number of intermediate and irregular units decreased. The average resting rate of all categories of unit showed an increase in firing from birth up to the adult stage, i. e., around the second postnatal month. The mean firing rate of regularly firing units was always higher than the two other categories throughout all the stages of development. These results were compared with similar work performed in the rat.Supported by grants from the C.N.R.S. (E.R.A.-187) and D.G.R.S.T. (no. 79-7-1073) 相似文献
52.
聚氨酯抗菌创伤敷料的制备及其灭菌效果的研究 总被引:12,自引:0,他引:12
以自制的亲水性聚氨酯软泡沫为载体制备抗菌创伤敷料。对4种抗菌剂(超微二氧化钛粉末、磺胺嘧啶银、磺胺、硝酸银)进行了实验。采用预聚体法、填充法、浸渍法等3种方法将抗菌剂加载于聚氨酯敷料中,测试了抗菌敷料的抗菌性能并进行了比较。结果表明,4种抗菌剂制备的敷料均有抗菌效能。综合考虑抗菌敷料的抗菌性能、手感、颜色、掉粉等因素,将超微二氧化钛粉末、磺胺嘧啶银和磺胺3种抗菌剂,填充加载法制备抗菌创伤敷料,抗菌效果好, 相似文献
53.
以5%乙酸冲洗正常人膀胱,获得膀胱粘膜酸溶性提取物。电泳凝胶琼脂糖弥散法抗菌实验分析表明,膀胱粘膜酸溶性提取物中有一条主蛋白带(称之为HBP)对致病性大肠杆菌ML-35P株有抗菌活性。以超滤方法对膀胱粘膜酸溶性提取物进行分离纯化,获得分子量低于1×10~4的超滤纯化样品,其中主要含HBP。琼脂糖弥散法抗菌实验结果表明,超滤纯化样品对大肠杆菌ML-35P株、绿脓杆菌ATCC27853株、金黄色葡萄球菌ATCC25923株及血链球菌S_34Sr株均有很强的抗菌活性。采用Tricine-SDS-pAGE鉴定,超滤纯化样品主要显示为两条分子量分别为6.7×10~3和8.5×10~3的多肽。研究结果首次提示,人膀胱粘膜内存在抗菌活性很强的内源性抗生肽,是膀胱抗感染防御的主要因素。 相似文献
54.
为在国内开发治疗妇女更年期与手术后绝经症的新药 ,对国产替勃龙进行了多项生殖内分泌生物实验 ,结果表明该药兼具雌激素、孕激素及雄激素活性 ,并有延迟排卵作用 ,对大鼠雌激素缺乏性阴道炎也有治疗作用。其药理特性符合临床治疗女性更年期综合症要求。 相似文献
55.
56.
Ziggi Ivan Santini Lau Caspar Thygesen Steinar Krokstad Lars Ole Bonde Robert J. Donovan Vibeke Koushede Anita Jensen Ai Koyanagi Ola Ekholm 《British journal of health psychology》2023,28(3):844-859
Objectives
International literature suggests that arts and culture activities may benefit mental health, however, such survey studies conducted in the Danish population are scarce. Further, studies have investigated the associated risk for incident depression, but not for persistent depression. The objective of the current prospective study was to assess associations of engagement in arts and culture activities with incident/persistent depression and also mental wellbeing among Danish adults in the general population.Design
Observational prospective study.Methods
Data stem from a Danish nationally representative panel study of 5000 adults (aged 15+ years) conducted in 2019 and 2020, which was linked to Danish register data. An exposure variable was constructed for frequency of attending concerts, theatres, museums, and cinemas. Validated scales were used to assess the presence of depression (PHQ-8) and levels of mental wellbeing (SWEMWBS). Binary logistic regression analyses were conducted to assess the risk of incident depression (among participants free of depression at baseline), as well as the risk of persistent depression (among participants with depression at baseline), while multinomial logistic regression was used to assess odds for moderate and high mental wellbeing (low as base outcome) while adjusting for baseline values.Result
In terms of incident depression, quarterly engagement in arts and culture activities (compared to never) was associated with an OR of .43 (95%CI .23–.80), while 8 times or more was associated with an OR of .53 (.29–.97). In terms of persistent depression, quarterly engagement was associated with an OR of .30 (.10–.90), while 8 times per year or more was associated with an OR of .26 (.07–.92). Similar to the patterns for incident/persistent depression, associations with moderate mental wellbeing showed higher odds for quarterly engagement and 8 times per year or more. Quarterly engagement was also associated with higher odds for high mental wellbeing but did not reach statistical significance.Conclusions
The results support the involvement of the cultural and creative sectors in health strategies. Mental health promotion initiatives as well as arts and culture sectors may encourage the general public to engage in arts and culture activities with frequencies of at least once per quarter. 相似文献57.
An efficient synthesis of 3-(E)-hydroxy- and 3-(E)-acetoxypropenylcephem derivatives, key intermediates for the synthesis of 3-(E)-propenylcephalosporins was achievedvia Stille coupling reaction of 3-trifloxycephem with 3-(E)-tributylstannylallylic alcohol. 相似文献
58.
Several oxazolidinones having amine moiety were prepared to form a quaternary ammonium salt with cephalosporin nucleus, and antibacterial activity of the quaternary ammonium cephalosporin derivatives bearing oxazolidinone moiety were examined particularly with expectation of dual activity. However, the cephalosporin-oxazolidinone compounds revealed rather weaker antibacterial activity in vitro than their parent oxazolidinone and cephalosporin without showing any characteristic activity as expected. 相似文献
59.
In Hwa Chung Choong Sup Kim Jae Hong Seo Bong Young Chung 《Archives of pharmacal research》1999,22(4):391-397
The quaternary ammonium cephalosporin derivatives were prepared with various pyridines substituted at the 3 or/and 4 position. Their in vitro antibacterial activities were determined and substituent effect on pyridine nucleus was studied. Preparation of substituted pyridines are also described. 相似文献
60.