轴突分叉点位置计算法适用性的分析

某些中枢神经元通过分叉轴突向两个以上核团投射。轴突分叉点的位置通常由计算轴突主干传导时间予以估测。但是,本工作用该法的4个公式计算细胞内或细胞外记录到的数据未能得到一致和可信的数值。结果提示,计算法的原理是不合理的,并至少对在细胞内或细胞外记录条件下估测轴突分叉点是不适用的。     

眼底荧光血管造影中按摩内关与合谷穴对恶心和呕吐的影响

观察按摩内关和合谷穴对上有底荧光血管造影中恶心和呕吐的影响。眼底荧光血管造影中发生恶心和呕吐的６０例患者随机分为治疗组和对照组。治疗组按摩一侧或双侧内关穴和合谷穴；对照组未进行治疗，在发生恶心患者中，治疗组３０例中发生哎者２例；对照组发生呕吐者９例，两组的发生率有显著差异     

Suicide substrate reaction-diffusion equations: Varying the source

The suicide substrate reaction is a model for certain enzyme-inhibitingdrugs. This reaction system is examined assuming that the substratediffuses freely while the enzyme remains fixed. Two sets ofinitial and boundary conditions are examined: one modellingan instantaneous point source, akin to an injection of substrate,the other, a continuous point source, akin to a continuing influx,or intravenous drip, of substrate. The quasi-steady-state assumptionis applied to obtain analytical solutions for a limited parameterspace. Finally, further applications of numerical and analyticalexperimentation on pharmaceutical mechanisms are described.     

穴位注药治疗精神分裂症的研究

目的　观察穴位注射丹参合并小剂量抗精神病药物与单用抗精神病药物治疗精神分裂症的疗效。方法16 0例患者随机分为治疗组 10 0例 ,对照组 6 0例 ;辨证分为 5型 ,用阴阳经相配取穴的方法 ,根据疾病的虚实 ,用迎随和徐疾补泻手法 ,治疗组每日注射 1次 ,10次为 1疗程 ,共治疗 3个疗程 ;用简明精神症状量表 (BPRS)和药物副反应量表 (TESS)评定疗效和副反应 ,治疗结束后随访两年。结果　治疗组痊愈率、显效率与对照组间差异有显著性意义 (P <0 0 5 )。BPRS和TESS量表于每疗程结束后两组评分比较差异均有显著性意义 (P <0 0 5 ) ;复发率与对照组间差异有显著性意义 (P <0 0 5 )。结论　穴位注射丹参具有见效快、副作用少、远期疗效好的特点。实施有效的护理 ,适时的健康教育是提高患者依从性 ,保证有效治疗、取得良好效果的重要手段。     

Effect of isoelectric point on biodistribution and inflammation imaging with indium-111-labelled IgG

Electrostatic effects play an important role in protein interactions and may alter the biodistribution of antibodies. To study the effect of molecular charge on the biodistribution and infection imaging properties of human polyclonal immunoglobulin G (IgG), its iso electric point was varied by changing the level of diethylene triamine penta-acetic acid (DTPA) substitution: 0.8, 0.9, 3.7, 5.1 and 5.9 DTPA/IgG. Biodistributions of the different IgG preparations were determined at 10 min, 1, 6, 24, and 48 h post injection in normal rats, and infection imaging properties were determined in rats withEscherichia coli thigh infections. The biodistribution was significantly affected by pl. The immunoglobulin preparations with 0.9 and 3.7 DTPA/IgG showed faster clearance from the circulation and generally lower accumulation in most organs. The images had a target-to-background ratio of approximately 1.3–2.3:1. These results suggest that even though targeting is not affected by the level of DTPA substitutions, preparations with 0.9 and 3.7 DTPA/IgG may be superior imaging agents because of reduced accumulation by background organs.     

Point Mutation in the Parkin Gene on Patients with Parkinson''''s Disease

Summary;To investigate the distribution of possible novel mutations from parkin gene in variant sub-set of patients with Parkinson’s disease(PD)in China and explore whether parkin gene plays an im-portant role in the pathogenesis of PD,70 patients were divided into early-onset group and late-onsetgroup; 70 healthy subjects were included as controls.Genomic DNA from 70 normal controls andfrom those of PD patients were extracted from peripheral blood leukocytes by using standard proce-dures.Mutations of parkin gene(exon 1—12)in all the subjects were screened by PCR-single strandconformation polymorphism(SSCP),and further sequencing was performed in tue samples with ab-normal SSCP results,in order to confirm the mutation and its location.A new missense mutationGly284Arg in a patient and 3 abnormal bands in SSCP electrophoresis from samples of another 3 pa-tients were found.All the DNA variants were sourced from the samples of the patients with early-on-set PD.It was concluded that Parkin point mutation a     

What is the HACCP (hazard analysis critical control point) approach and how can it be applied to enteral tube feeding?

The HACCP (hazard analysis critical control point) concept is now widely applied in the food industry and provides a structured and critical approach to the identification and control of hazards that may affect food safety. It has shifted the emphasis for control from retrospective end-product testing to the effective control of raw materials and key processing operations.
This paper discusses how the HACCP approach can be applied to enteral feeding. This involves each unit assembling a multidisciplinary team of personnel involved in enteral feeding. This team will then carry out a detailed analysis of the process from selection of ingredients and feeding systems through to consumption of the feed by the patient by constructing a flow chart that relates specifically to each unit. They can then identify and assess the hazards associated with the handling of the product at each stage in the process. This will enable them to identify the points where control over an identified hazard can be achieved (critical control points, CCP) such as quality of ingredients, design of administration systems, preparation and distribution of the feeds and the procedures involved in the assembly and manipulation of the systems. Control and monitoring procedures can then be specified and implemented at relevant stages in the process. The major strengths of the HACCP procedure are that it entails a team effort from key personnel involved in the full range of activities associated with the product and each detailed analysis is specific to each unit's practices and resources and can be continually reviewed and modified in response to changing circumstances.     

胃粘膜癌变初发点及其组织背景的病理学：癌变初发点的一般组织病理学

本文通过对228例各种类型胃粘膜上皮异型增生的病理切片的复查,发现并详细地描述了不同类型异型增生腺管和上皮细胞癌变的初发点(Start point)。其形态有的是从再生腺管的腺颈部或底部以“发芽”形式,向质内浸润并分枝生长;有的是从再生腺管基底膜向侧方的间质浸润。从再生的胃上皮型异型腺管所出现的癌变多为低分化型腺癌;从肠上皮型异型腺管所发生的癌变则为高分化型腺癌。强调了胃粘膜再生性异型增生有些具有癌前性质。     

东方人苯丙酮尿症的分子遗传学—苯丙氨酸羟化酶基因中一终止突变与单体型4的连锁不平衡性

应用聚合酶链反应(PCR)方法扩增苯丙氨酸羟化酶(PAH)基因的每个外显子及其侧翼的内含子,并克隆到M 13载体中进行序列分析。发现中国人苯丙酮尿症(Phenylketonuria,PKU)患者的PAH基因外显子3中有1个Arg~(111)→Ter~(111)的点突变,此突变与东方人最常见的突变单体型4呈连锁不平衡。此突变占中国人PAH等位基因的10％左右,但不存在于高加索人群中,表明在种族分化过程中PAH基因位点发生了互不相关的突变事件。     

Point mutation in the parkin gene on patients with Parkinson’s disease

Summary To investigate the distribution of possible novel mutations from parkin gene in variant subset of patients with Parkinson’s disease (PD) in China and explore whether parkin gene plays an important role in the pathogenesis of PD, 70 patients were divided into early-onset group and late-onset group; 70 healthy subjects were included as controls. Genomic DNA from 70 normal controls and from those of PD patients were extracted from peripheral blood leukocytes by using standard procedures. Mutations of parkin gene (exon 1–12) in all the subjects were screened by PCR-single strand conformation polymorphism (SSCP), and further sequencing was performed in the samples with abnormal SSCP results, in order to confirm the mutation and its location. A new missense mutation Gly284Arg in a patient and 3 abnormal bands in SSCP electrophoresis from samples of another 3 patients were found. All the DNA variants were sourced from the samples of the patients with early-onset PD. It was concluded that Parkin point mutation also partially contributes to the development of early-onset Parkinson’s disease in Chinese. WANG Tao, male, born in 1961, Associate Professor This work was supported by grants from the key program of the special scientific project of Scientific & Technologic Agency of Hubei Province (Serial No. 2001AA308B01) and the Hygienic Research Project of Hygienic Agency of Hubei province (Serial No. WJ 01529).