养殖周期对中华鳖营养成分的影响研究

鳖一直被视作为滋补佳品。但以短期快速促生长方式生产的养殖中华鳖的质量与野生中华鳖有区别 [1 ] ,其主要原因是生长时间的差异 ,还是养殖环境等其他因素所造成 ,尚未见报道。本研究通过对相近环境条件下不同年龄的商品鳖和不同环境中同一年龄的商品鳖的营养成分的比较 ,了解养殖周期对商品鳖营养成分的影响 ,为选择合理的养殖周期提供理论依据。1　材　料　与　方　法　　由余杭生泰中华鳖养殖有限公司 (YT)提供 2、3龄相同养殖条件仿生养殖中华鳖各 6只 ,2龄中华鳖体重 450～ 50 0 g,3龄中华鳖体重 51 5～ 552 g,均为雄性。养殖池塘面…     

Prevalence of respiratory allergy in a platinum refinery

Summary In a cross-sectional study, 65 workers in the chemical industry with exposure to platinum salts were investigated with regard to the prevalence to allergic respiratory tract diseases. A respriatory questionnaire, a skin-prick test with K₂PtCl₆ and environmental allergens, determination of total IgE, platinum-specific IgE and histamine release in basophilic granulocytes and lung function tests were applied before and after a Monday shift and after a Friday shift. Work-related symptoms of respiratory allergy were present in 23% of all workers, but were significantly more frequent in the most exposed group in the platinum refinery (52.4%). Of all workers, 18.7% had a positive skin-prick test with platinum salt. As compared to the other workers, the workers with work-related symptoms of respiratory allergy had significantly more positive skin-prick tests (64.3%) and a higher total IgE and platinum-specific IgE; they did not, however, show higher histamine release. In the course of the week, a significant fall in lung function, namely in FEV₁ and FEF25, was recorded in the group of workers with work-related symptoms.     

磺胺噻二嗪硫酮衍生物的合成及其抑菌活性

利用药物化学骈合原理设计并合成了一系列新的３，５－二取代１，３，５－噻二嗪－２－硫酮类化合物，其结构经红外光谱，紫外光谱及元素分析证实，抑菌活性试验显示了良好的抑菌活性。     

某化工厂1987～2000年164例工伤事故调查分析

目的调查分析某化工厂工伤事故的分布规律及其危险因素,以便采取相应的预防干预措施。方法对1987～2000年该化工厂发生的工伤事故进行回顾性调查分析,建立数据库,并统计分析。结果 ①事故以轻伤为主,约占80.0％。②事故类别主要是灼烫烧伤和机械伤害,分别为工伤事故总数的35.8％、28.5％。③工伤伤害性质以骨折多见,约为总数的56.1％。④受伤工人的年龄分布以30～40岁段为主,约为总数的31.1％。⑤工伤事故原因中注意力不集中和违反操作规程分别为总数的43.0％,38.3％。结论12根据上述流行病学特点,采取相应的措施来减少工伤事故的发生。     

N－（4－乙氧苯基）苯甲酰胺类化合物的合成及抗炎、抗变态反应活性研究

Ｎ┐（４┐乙氧苯基）苯甲酰胺类化合物的合成及抗炎、抗变态反应活性研究周玉新１）党永红刘建飞２）徐颖刘百里（沈阳药科大学制药系，沈阳１１００１５）郑文义（东北第六制药厂，沈阳１１００４３）１９８１年，刘百里等〔１，２〕发现和研制的新药益肤酰胺，经药理实...     

秦巴山区野生与栽培猪苓菌核主要成分的测定

采用原子吸收分光光度法、高效液相色谱等方法对秦巴山区野生与栽培猪苓菌核的氨基酸、水分、灰分、粗蛋白、粗脂肪、粗纤维、矿质元素、猪苓多糖等主要成分及含量进行测定.结果表明,野生和栽培猪苓在所测定的17种氨基酸中,7种必需氨基酸占氨基酸总量的质量分数分别为33.8%,23.6%.每100g野生与栽培猪苓菌核中水分质量分别为13.22g,11.94g;灰分质量分别为2.86g,2.61g;粗蛋白质量分别为6.87g,4.91g;粗纤维质量分别为27.62g,26.02g;粗脂肪质量分别为1.87g,1.71g;每100g野生和栽培猪苓质量分别为1.87g,1.71g;猪苓多糖质量分别为0.51g,0.40g.     

Leisure Activities of Individuals With Prader-Willi, Williams, and Down Syndromes

This study extends laboratory-based profiles to participation in leisure activities for persons with three genetic syndromes. Parents of 223 persons with Prader-Willi, Williams, and Down syndromes filled out a newly developed Leisure Activities Questionnaire. Sixteen items loaded onto five distinct factors: social; visual-spatial; visual-strategy; musical; and physical activities. Individuals with Williams syndrome less often participated in visual-spatial activities, those with Prader-Willi syndrome more often performed both visual-spatial and visual-strategy activities, and those with Williams and Down syndromes more often performed musical activities. With increasing chronological ages, all groups increased in their social activities, while those with Williams and Down syndromes decreased in their visual-spatial activities. In both Prader-Willi and Williams syndrome, decreased maladaptive behaviors related to greater amounts of participation in etiology-related activities. Theoretical and practical implications are discussed.     

胆囊结石化学类型的计算机辅助诊断

探讨胆囊结石化学类型与各影像学特征的关系，并建立简便而有效的体外预测结石化学类型的方法。     

The effects of phorbol esters with different biological activities on protein kinase C

The sapintoxins are a series of naturally occurring fluorescent phorbol esters with a range of selective biological activities (e.g. pro-inflammatory but non-tumour promoting). Their ability to activate protein kinase C (PKC) in vitro has been studied. Both tumour promoting and non-promoting phorbol derivatives activate the enzyme in vitro at low concentrations. 12-deoxyphorbol-13-phenylacetate-20 acetate (DOPPA) acts as a partial agonist in the activation of protein kinase C. Structurally distinct phorbol esters may therefore preferentially activate different forms of protein kinase C. α-sapinine, a biologically inactive compound, binds to protein kinase C without stimulating the enzyme and prevents subsequent activation by phorbol esters such as 12-O-tetradecanoyl phorbol-13-acetate (TPA).     

Multiple Implants for First Molar Prosthodontics

Problems that can occur when single implants are utilized to restore first molar teeth include the frequent loosening of screws, as well as screws and/or implant breakage. These may result from torquing and rotational movements of the prosthesis during masticatory and parafunctional mandibular movements. When sufficient bone and mesio-distal restorative space is present, the placement of two implants should be considered.