~(60)Co-γ射线照射后HeLa细胞存活曲线和数学模式

本文研究了~(60)Co-γ射线照射后HeLa细胞的存活曲线,比较了两种数学模式拟合的结果.拟合优度以对误差加权的残差平方和(Q)作为统计指标进行评价.结果表明模式的拟合度较模式为优.     

桡骨与尺骨的测量及回归分析

本文测量了桡骨与尺骨各100例,其中桡骨15项指标,尺骨14项指标。并用IBM·PC—XT计算机DBASEⅢ数据库管理系统进行了统计分析以及用桡、尺骨最大长分别与桡、尺骨其它各项指标间进行直线相关分析,建立了25个回归方程。     

Effects of amoxapine and imipramine on evoked potentials in the Continuous Performance Test in patients with affective disorder

Twenty patients with major depressive disorder were studied with evoked potential (EP) topographic mapping after receiving placebo, imipramine, or amoxapine for 2 days in a random-assignment, double-blind design. Patients performed the Continuous Performance Test (CPT), a visual vigilance test. The stimuli were the digits 0-9, with 0 a target to be responded to with a button press. EPs were recorded from 32 channels and were averaged separately for detected and undetected targets and for false positives and correctly identified nontargets (no button press). Twenty-one normal controls were also tested. Amoxapine enhanced N120 amplitude in midline parietal and right parietal cortex where selective attention effects have been found to be greatest in studies of normal controls. Both amoxapine and imipramine enhanced differences in P200 between target and nontarget stimuli in comparison to placebo, with amoxapine differences again being greatest over midline parietal locations. CPT performance was significantly better on amoxapine than placebo.     

Investigation of infection with human papillomavirus in areas of high and low incidences of cervical carcinoma in Sichuan Province]

From Jan. to Oct. 1989, we investigated the role of various life style and dietary factors in areas of high and low incidences of cervical carcinoma, as well as infection with types 16 and 33 of human papillomavirus (HPV) in populations. The polymerase chain reaction (PCR) technique was used to detect the infection with HPV 16/33. The result showed that the infection rate of HPV was about 17.9% (Guangyuan, area of high incidence of cervical cancer), and the infection rate about 3.4% (Mian Zhu, area of low incidence of cervical cancer). It was clear that Guangyuan was 5-fold as the infection rate of HPV 16/33 as Mian Zhu. Strong and statistically significant associations were found to between infection rate of Guangyuan and Mian Zhu (P < 0.001). Other risk factors of cervical carcinoma, such as cigarette smoker, Vegetable intake, genital hygiene, personal hygiene etc, were also discussed and analysed in the article.     

261例恶性肿瘤患者血液流变学的检测结果

检测261例恶性肿瘤(肺癌、乳腺癌、胃癌、原发性肝癌、恶性淋巴瘤、食管癌及结直肠癌等)患者的血液流变学水平,并与健康人作了比较。检测结果表明,恶性肿瘤患者的血浆粘度,全血低切粘度及血沉均有明显升高(P<0.05和0.01);而血细胞压积(除乳腺癌外)均低于健康人(P<0.01)。纤维蛋白原水平除恶性淋巴瘤及肠癌外均有明显增高(P<0.05和0.01)。肿瘤复发转移患者仅血浆粘度高于无复发转移者(P<0.01)。作者还对原发性肝癌和肝硬化病人、胃癌和慢性胃炎病人的血液流变学各项指标做了比较分析,结果发现某些指标有明显差异,以血浆粘度变化尤为明显。因此认为血浆粘度对良、恶性的肝、胃疾患可能有一定的鉴别诊断意义。     

A patient with severe ventricular tachycardia who was saved by prolonged extracorporeal lung and heart assist]

A 47-y-o man had been suffering from cardiac failure due to refractory ventricular tachycardia (VT) after myocardial infarction. He underwent resection of the left ventricular aneurysm and cryocoagulation of the arrhythmogenic foci. On the 2nd post-operative day, VT often recurred in spite of repeated cardioversion and drug therapy, and threatened his life, even under IABP. Therefore, a veno-arterial bypass route was made and extracorporeal lung and heart assist, ECLHA, was started with a heparin bonded Maxima lung on the following day. Even under ECLHA, VT continued to recur. Cryocoagulation of the VT foci was tried again, without immediate success. A record high dose of beta-blockers, given under the circulatory support by ECLHA, stopped VT on the following day. The patient was weaned from the ECLHA circuit 12 days after the first operation, then from IABP on the 14th day. During the 10 day course of surgeries and ECLHA, the patient had almost 100 defibrillations. But for ECLHA, we may say that the patient couldn't have survived two open heart surgeries, administration of a great amount of beta-blockers, and repeated cardiac arrest without neurological sequelae.     

抗凝血酶Ⅲ测定在评价肝脏功能中的应用

测定110例肝病的抗凝血酶Ⅲ(AT-Ⅲ)活性,62例低于正常(56.4％),均值为60.1±38.2％。50例正常对照为100.0±26.7％。重症肝炎、慢性活动性肝炎及失代偿期肝硬化活性显著下降,均值分别为12.9±13.0％、51.0±34.6％、43.3±29.6％.AT-Ⅲ活性在评价肝脏功能方面较凝血酶原时间敏感,具有一定的实用意义。     

通过原生质体融合获得青霉素高产菌株

采用两株分别带有不同抗药性标记的产黄青霉原生质体以1:1相混合,用30％的聚乙二醇(MW6000)原生质体融合处理。将混和物涂布在补给有两种药物同时存在的高渗性分离培养基上,培养后获得异核体菌落。洗下异核体分生孢于继续分离在补给有两种药物同时存在的分离培养基上,得到了同时带有两种抗性标记的重组体。纯化后,进行抗性稳定性和摇瓶效价的测定,将一株具有双重抗性、摇瓶发酵效价较高的菌株作出发菌株,经诱变因子处理后,获得了一株43u7c—57菌株,在摇瓶中效价比生产菌株平均提高4.94％,该菌株在40吨发酵罐试生产后,发酵效价平均提高4.4％,产量则平均增加12.15％。     

Accuracy of allometrically predicted pharmacokinetic parameters in humans: role of species selection.

A general equation was derived, which directly describes the mathematical relationship between the allometrically predicted pharmacokinetic (PK) parameters in humans and the body weights of animal species (along with their corresponding measured PK parameters). It was shown, with use of the derived equation, that the predicted values in humans, based on combinations of animal species commonly used in allometry, are heavily dependent on certain species, for example, the dog. In contrast, parameter values from the rat made no contribution to the predicted human values, as long as the rat was not the smallest species used. Monte Carlo simulations were further performed to examine the species or weight dependence. The cost-effective combinations of animal species, in terms of number and species type, were theoretically examined through simulations. Finally, literature data demonstrated the species or weight dependence predicted from the equation and as illustrated through the Monte Carlo simulations. Appreciation of this species or weight dependence should guide researchers in selecting animal species and designing optimal experiments in the application of allometric scaling.