氨甲环酸中顺式异构体的高效液相色谱法测定

本文采用高效液相色谱法测定氨甲环酸中的顺式异构体含量。先用衍生化试剂３，５－二硝基苯酰氯预处理氨甲环酸，然后通过ＨＰＬＣ，以喹啉为内标，ＹＭＣ－ＰａｃｋＡＭ－３０２ＯＤＳ为色谱柱，甲醇－０．０２ｍｏｌ／Ｌ醋酸铵溶液（４：７）为流动相，在２５４ｎｍ波长处检测，顺式异构体在１～２．５μｇ／ｍｌ范围内线性关系良好（ｒ＝０．９９６１），最低检测限为０．０２％。     

盐酸克林霉素的反相HPLC法含量测定

盐酸克林霉素的反相ＨＰＬＣ法含量测定河南省药品检验所郑州４５０００３王巨才，安华民盐酸克林霉素（ＣｌｉｎｄａｍｙｃｉｎＨｙｄｒｏｃｈｌｏｒｉｄｅ）是由盐酸林可霉素半合成而得，由于林可霉素为多组分抗生素，故克林霉素中，一般还含有克林霉素Ｂ、７－差向克林...     

150例弥漫型肝癌的B超诊断分析

总结分析了７年来１５０例弥漫型肝癌的Ｂ超征象。提出了本病的主要声像特点为肝脏的体积明显增大，肝内呈弥漫性小结节回声，结节状回声大小不一致，以小结节为主，回声不均持，分布不均匀，肝脏边缘呈波浪状及不规则状改变，可伴有少量腹水。若同时伴有门静脉癌栓，可确诊本病。同时提出了其它肝外改变及与其它肝脏弥漫性病变的鉴别要点。     

B超诊断幼儿蛔虫性肠穿孔一例

患儿，女，4岁，住院号34184，发热2周，伴腹痛、腹胀、便血6天。以发热原因待查：①伤寒?②败血症?③肠结核?而收入院。     

Functional Maturation of Neuroendocrine Gonadal Axis is Altered by Specific Phase Relations of Circadian Neurotransmitter Activity in Japanese Quail

The preset study was designed to ascertain the effects of temporal relationship of circadian neural oscillations on puberty attainment and reproductive growth of Japances Quail,Coturnix coturnix japonica,Serotonin and dopamine precursors(5-hydroxytryptophan,5-HTP and L-dihydroxyphenylalanine,L-DOPA,5mg/100g body weight)were injected daily,8and 12h apart in two groups of one-day ld chick,while cotrols received two daily injections of normal saline.Weekly/biweekly observations(body weight,cloacal gland size,testicular volume and activity,ovarian follicular diameter and rate of egg production)were made until 9 weeks of age,when the experiment was terminated.Results indicate that 8 h relationship completely suppressed gonadal growth even under long photoperiod(LD16:8),while a 12 h relationship induced precocious sexual maturity and increased the rate of reproductin(spermatogenesis and egg production).It is concluded that circadian phase relationship of serotonergic and dopaminergic activity may not only determine the onset of reproduction in this pultry species,but may also alter the rate of reproduction possibly by affecting photoperiodic mechanism of reproductive regulation.     

凝血酶原时间测定标准化研究的某些进展

凝血酶原时间测定标准化研究的某些进展邓福贵黄杰俞真奎血液学教研室成都市第三人民医院甘孜州稻城县医院检验科１９３５年Ｑｕｉｃｋ首创凝血酶原时间（ＰＴ）测定一期法，用测定的秒数报告结果，但不同仪器使用同样的ＰＴ测定系统所得ＰＴ值不同，即存在技术性偏倚。１...     

空气中联苯—二苯醚混合物的气相色谱测定方法研究

用硅胶管采集空气中联苯-二苯-醚经二硫化碳解吸,再经5%PEG6000:chromosorbWAW(60～80目)柱分离后,用FID检测。本方法最低检测限为6.1ng,当浓度为7～70μg/ml时,平均相对标准差为6.6%,若采样10L最低检测浓度为1.3mg/m~3。