Law-like relationship between height and weight of school children

Ehrenberg’s Law-like relationship between height and weight [log was applied to a group of public school and Govt. school children in New Delhi. It was found that the model log was comparatively a good fit for public school children and the model log for Govt. school children. On fitting the model to the sample data it was found that the value of ‘a’ was 0.8, with some minor variation in the second decimal point and the value of ‘b’ was 0.39 & 0.36 respectively for public school boys and girls and 0.32 & 0.29 respectively for Govt. school boys & girls. These results corroborates with the findings of the earlier studies that the intercept constant ‘b’ in the Law-like relationship equation is influenced by the nutrition of children. This model is recommended because of its simplicity and practical usefulness using only already available information.     

Isovelocity investigation of the lengthening behaviour of the erector spinae muscles

The purpose of this study was to investigate the force-velocity (F/) relationship for the erector spinae muscles in submaximal activation movements, with particular attention to their response during lengthening movements and at lower shortening contraction velocities. Dynamic models that predict lower back muscle forces require reasonable representations of the modulating effect of instantaneous velocity. Ten males were observed performing trunk flexion and extension in the sagittal plane under constant load. Contraction velocities were measured as the first derivative from a devise sensitive to changes in spine curvature, and controlled by a visual feedback system while a constant load was applied through a chest harness. The erector spinae exhibited a yielding phenomenon which causes an abrupt drop in force during constant velocity stretching under constant, submaximal, stimulation. The findings were consistent with previous isovelocity muscle lengthening experiments. Yielding appeared dependent on the level of load/activation supporting the theory of a state-variableF/ relationship. The eccentric behaviour of the lower erectors (L3) seemed independent of velocity and length, while that of the upper erectors (T9) showed a dependence on length. At lower concentric velocities, concavity in torque-velocity curves was noted after a threshold velocity. The findings of this study strongly reinforce the notion that theF/ length relationship is not a continuous hyperbolic relationship during muscle shortening and that the commonly modelled force augmentation effect of lengthening is incorrect, at least for submaximal activation of the extensors of the lower back.     

Towards an ethics of immediacy A defense of a noncontractual foundation of the care giver—patient relationship

In this article, I argue that the relationship between patients and their health care providers need not be construed as a contract between moral strangers. Contrary to the (American) legal presumption that health care providers are not obligated to assist others in need unless the latter are already contracted patients of record, I submit that the presence of a suffering human being constitutes an immediate moral commandment to try to relieve such suffering. This thesis is developed in reference to the French philosopher Levinas and the Dutch theologian Schillebeeckx. An expanded version of the biblical parable of the Good Samaritan serves as test case.This revised version was published online in October 2005 with corrections to the Cover Date.     

二硫化碳作业女工早期胚胎损伤的剂量反应关系

目的 探讨女工二硫化碳（ＣＳ２）接触水平与胚胎早期发育障碍之间的剂量－反应关系。方法 前瞻观察生育女工妊娠所需的月 经周期数;收集每个月经周期胚胎植入期尿样,检测绒毛膜促性腺激素含量;监测女工作业地点ＣＳ２浓度。结果 ２５７名接触组经临床确诊妊娠的女工,各月经周期妊娠机率低于３６６名对照组女工,时间妊娠率随女工ＣＳ２接触水平（ＣＳ２接触浓度以ＣＳ２接触工龄）升高而降低：妊娠率＝０．７０３３－０．０     

云南拉祜族六个基因座的遗传多态性研究

目的：了解云南拉祜族６ 个短串联重复序列基因座遗传多态性分布。方法：应用复合扩增技术对ＣＳＦ１ＰＯ、ＴＰＯＸ、ＴＨ０１ 、Ｆ１３Ａ０１、ＦＥＳＦＰＳ和ｖＷＡ等６ 个ＳＴＲ基因座进行分析,采用高分辨率的聚丙烯酰胺凝胶电泳分离、银染法显影技术,对云南拉祜族上述６ 个ＳＴＲ基因座进行遗传多态性调查。结果：ＣＳＦ１ＰＯ基因座,观察到８ 个等位基因,２０ 个基因型;ＴＰＯＸ 基因座,观察到５ 个等位基因,１４ 个基因型;ＴＨ０１ 基因座,观察到６ 个等位基因,１７ 个基因型;Ｆ１３Ａ０１ 基因座,观察到６ 个等位基因,１３ 个基因型;ＦＥＳＦＰＳ基因座,观察到７ 个等位基因,１５ 个基因型;ｖＷＡ基因座,观察到７ 个等位基因,１７ 个基因型。结论：上述６ 个短串联重复序列基因座基因频率分布与Ｈａｒｄｙ Ｗｅｉｎｂｅｒｇ 平衡吻合良好。     

具强杀菌活性的兔Ⅱ型磷脂酶A2互补DNA克隆及其顺序确定的研究

目的:确定具强杀菌活性的兔Ⅱ型磷脂酶A2(PLA2)cDNA和蛋白质的一级结构,了解其杀菌功能与蛋白质一级结构的关系.方法:用PCR方法从兔骨髓cDNA库中克隆出Ⅱ型磷脂酶A2 cDNA并确定DNA顺序,推断出它的蛋白质一级结构;并与其它一些动物PLA2的结构进行比较.结果:成功获得了该磷脂酶A2的cDNA和蛋白质一级结构.它是目前上百种已知蛋白质一级结构的磷脂酶A2中碱性最强的蛋白,氨基酸组成中碱性氨基酸较丰富.其它具杀菌活性的哺乳动物Ⅱ型磷脂酶A2也都是碱性强的蛋白.结论:磷脂酶A2一级结构中富于碱性氨基酸是其具有杀菌功能的关键,而杀菌活性的强弱与其分子碱性强度呈正相关.     

解剖型钢板治疗肱骨远端粉碎性骨折

目的：探讨解剖Ｙ型钢板的临床应用价值。方法：报告３６例解剖Ｙ型钢板内固定肱骨远端粉碎性骨折,进行临床分析讨论,其中列,女８例,平均年龄３６．８岁。３６例中均行肘后标准切口尽骨鹰嘴截骨暴整个肱骨远端,Ｙ型钢板、螺钉内固定。结果：本组随访１～５年,其中优良率８６．２％。结论：解剖Ｙ型钢板治疗治疗肱骨远端粉碎骨折,效果确切,术后有利早期活动关节,减少并发症。     

Assessment of general practitioners by video observation of communicative and medical performance in daily practice: issues of validity, reliability and feasibility

OBJECTIVES: To develop a video assessment method for General Practitioners (GPs) by analysing issues of validity, reliability and feasibility of observation of videotaped regular consultations. DESIGN: In a cross-sectional study consultations of 93 GPs were video recorded in the practice during 1 week. The GPs registered consultation and patient data in a logbook; 16 consultations per GP were selected using preset criteria. The quality of communicative and medical performance of these consultations was assessed by GP observers with a validated instrument. The validity of the procedure was evaluated by checking the content of each GP's sample using specific sample criteria. Selection bias was estimated by multiple regression analysis, with sample characteristics as independent variables and scores on communication and medical performance as dependent variables. The influence of observation on GPs and patients was assessed by a questionnaire. Generalizability theory was used to estimate reliability. Feasibility was assessed by conducting a questionnaire, by keeping accounts, and by checking the technical quality of the videotaped consultations. SETTING: Universities of Nijmegen and Maastricht, The Netherlands. SUBJECTS: General Practitioners (GPs). RESULTS: The domain of general practice was well covered in the samples; content validity was satisfactory. With regard to the sample characteristics, only the total duration of consultations appeared to correlate significantly with both the score on communication and the score on medical performance. A majority (71%) of GPs reported not being influenced by the observation, except in the first cases, and recognizing their usual daily performance in the videotaped consultations. An acceptable level of reliability was reached after 2.5 hours of observation, i.e. 12 cases by a single observer. The method was well accepted by both GPs and patients. The costs were pound250 per GP. CONCLUSIONS: Video assessment of GPs in daily practice according to the procedures described is a valid and reliable method, one which is useful for education and quality improvement. There is a trade-off between feasibility on one hand and validity, reliability and credibility on the other hand. Compared to investments in observation methods in standardized settings, the costs of video observation of GPs' actual performance are acceptable.     

性罪错妇女的性伴关系属性与HIV危险行为发生频率相关性的研究

为探讨性伴关系属性与ＨＩＶ 有关危险行为发生频率的相关性,对深圳收容教育所收容的８１３ 名性罪错妇女进行调查。对其中性伴结构相同、性伴关系多重的两组人群进行单向有序变量的Ｌｏｇｉｓｔｉｃ 回归分析,并将结果以数学模型形式表达出来。分析结果显示,性罪错妇女的性伴关系属性与ＨＩＶ危险行为的发生频率密切相关。提示：加强性伴关系干预将可能提高目前在ＨＩＶ 重点人群中开展的以健康宣传、健康教育为主的干预措施效果     

槲皮素对培养人视网膜色素上皮细胞增生及DNA合成的影响

目的研究槲皮素(quercetin, QUE)对培养人视网膜色素上皮(retinal pigment epithelium, RPE)细胞增生和DNA合成以及对表皮生长因子(epidermal growth factor, EGF)促RPE细胞增生和DNA合成作用的影响。方法用细胞计数和3H-胸腺嘧啶核苷(3H-thymidine, 3H-TdR)掺入方法,观察不同浓度(200、100、50、1μmol/L)的QUE和最大浓度的QUE(200μmol/L)在不同作用时间（24-168小时）,分别单独或与EGF共同作用时,对RPE细胞增生及DNA合成的影响,排除着色的死细胞,用活细胞计数法判断药物的细胞毒性作用。结果QUE 200μmol/L具有最强的抑制效应,48小时时抑制效应已明显出现,96小时时抑制达到高峰。与QUE单独作用相比,QUE对EGF的促RPE细胞增生效应能产生更强的抑制。QUE无细胞毒性作用,各实验组细胞活力均在85.00%以上。结论QUE以剂量依赖和时间依赖的方式抑制RPE细胞的增生,尤其是由EGF刺激的增生,并且对培养的RPE细胞无细胞毒作用。(中华眼底病杂志,1999,15:27-29)