慢性重型肝炎124例临床分析

目的 通过１２４例慢重肝临床分析对上前慢重肝治疗疗效、临床难点作一简要分析。方法 １２４例慢重肝进行病原分型、临床分期、分组治疗及疗效判定。结果 ①早、中期慢重父瘟菩Ы暇捌谡呦灾圆钜欤ǎ小矗埃埃担＂谠纭⒅衅诼馗尾∷缆式贤砥谡哂邢灾差异（Ｐ〈０．０５）。③分组治疗病死率无显著性差异（Ｐ〉０．０５）。④死亡组与存活组病例ＴＢ、ＡＬＢ、ＰＴＡ有显著性差异（Ｐ〈０．０５）。结论 ①早、中期慢重肝     

A projection access order for speedy convergence of ART (algebraic reconstruction technique): a multilevel scheme for computed tomography

The practical performance of algebraic reconstruction techniques (ART) for computed tomography (CT) depends heavily on the order in which the projections are considered. Complete orthogonalization, notwithstanding its theoretical justification, is not feasible because the computational time is prohibitive. The authors report here a scheme that yields the most efficient reconstruction without orthogonalization: projections are organized and accessed in a nominally multilevel fashion. Each level makes the best use of the image information reconstructed in the preceding levels. If the number of projections is a power of two. Then the access orders are exactly that for the 1D FFT. The authors' scheme can be easily implemented. Using it, one iteration of ART yields a high-quality image. Experimental results of this algorithm are demonstrated and compared with the results from the conventional sequential method and also random ordering. Comparisons show that this scheme is superior. ART is better in image quality than the Fourier back-projection algorithm, at least for a smaller number of projections. Since the authors have made it much more efficient in computational speed, ART could now find widespread use in medical imaging.     

Microdissection and microcloning of chromosomal alterations in human breast cancer

Summary The recognition of recurring sites of chromosome changes in malignancies has greatly facilitated the identification of genes implicated in the pathogenesis of human cancers. Based especially upon recent studies [1–4], it appears increasingly likely that a subset of recurring chromosome alterations will be recognized in human breast cancer. Currently recognized chromosome changes characterizing breast carcinoma include the recognition of cytologic features of gene amplification (e.g. double minutes [dmins] and homogeneously staining regions [HSRs]) [5–8]. As these and other chromosome regions are implicated in recurring abnormalities in breast cancer, it will become increasingly important to have band-or region-specific genomic libraries and probes in order to facilitate high resolution physical mapping and ultimately to clone breast cancer related genes [9]. Toward this end an important recent development in physical mapping has been the establishment of chromosome microdissection as a rapid and reproducible approach to rapidly isolate and characterize chromosome region-specific DNA, greatly facilitating the initial steps in positional cloning of disease-related genes [10–13]. In this brief report, we will highlight the application of chromosome microdissection to the generation of region-specific probes for both fluorescent in situ hybridization (FISH) and the generation of genomic microclone libraries. Additionally, efforts using this methodology to generate a microclone library encompassing the early onset breast/ovarian cancer (BRCA1) gene will be presented.Presented by Jeffrey M. Trent at the 16th Annual San Antonio Breast Cancer Symposium, San Antonio TX, USA, November 4, 1993; Minisymposium on Molecular Genetics in Breast Cancer.     

Anemia and malnutrition in children at public schools in Osasco,São Paulo,Brazil

The authors studied a sample of students entering the first grade in the Osasco public school system in order to determine both the prevalence of anemia and nutritional status. Osasco is part of the Greater S o Paulo Metropolitan Area. Diagnosis of anemia was made through the hemoglobin concentration of blood from digital puncture. World Health Organization (WHO) levels were used to define anemia. Nutritional Status assessment. was made through weight/age and height/age indices, using Z score distribution and the National Center for Health Statistics (NCHS) reference levels. Prevalence of anemia was 51%. Prevalence levels varied according to the schools' geographic location: 56.9% in peripheral neighborhoods and 41.7% in central areas. Children with illiterate parents had a higher prevalence of this condition. Risk of anemia was higher for children who were over eight years of age when entering the first grade. Acute malnutrition was not found. Prevalence was higher than expected and points to the urgent need to establish an anemia control program for schoolchildren in this population.     

高校离退休老人躯体健康与心理状况的相关性研究

目的：了解离退休老人躯体健康和心理状况的关系。方法：采用ＣＭＩ和ＳＣＬ－９０对２２５名高校离退休老人进行调查,分析两者的关系。结果：既往健康状况、神经系统疾病和躯体化成正相关;强迫与呼吸系统疾病成正相关,与心血管系统疾病成负相关;疲劳感和敌对成负相关,和睡眠饮食障碍成负相关。结论：维持老人心身健康,主要在于防治慢性疾病和神经系统疾病,以及对躯体化障碍和强迫症状的干预     

HPLC法测定蔓荆子黄素的含量

以蔓荆子黄素为指标,用反相 ＨＰＬＣ法测定了蔓荆子中的含量,实验采用 Ｃ_(１８)柱,以甲醇－０．４％磷酸溶液（６０： ４０）为流动相,检测波长 ２５８ｎｍ,用外标法测定,回收率为 ９８．１８％,ＲＳＤ１．４６％,线性范围 ０．１５～０．７５μｇ。本法快速简便,重现性好,为蔓荆子质量控制提供了可靠的依据。     

左室重量与左心功能不全相关性的研究

目的：研究可否用左室重量表达并判定左心功能不全的可能性。方法：将左心功能不全按NYHA标准分成4个级别,每级1组,并设正常对照组,用超声心动图测量同一个病人的左室射血分数（LVEF）和左室重量。用SAS统计软件做方差分析。结果：LVEF与左心功能不全高度负相关（R＝－0．77270）,左室重量与左心功能不全高度正相关（R＝0．73421）。LVEF、左室重量各级指标间差别显著（n＝153,F＝64．85,P＜0．01;n＝153,F＝53．39,P＜0．0001）。各级与对照组比统,LVEF指标从Ⅱ级开始方有显著差别（P＜0．05）;而左室重量指标从Ⅰ级开始就有显著差别（P＜0．05）。结论：LVEF与左室重量指标均与左心功能不全高度相关,但心功能Ⅰ级的病人,左室重量指标更为敏感。     

晶状体上皮细胞PAI—1蛋白酶mRNA的表达

研究从转录水平确定晶状体上皮细胞是否能够合成纤麦原激活物抑制物－１蛋白酶。方法体外培养的牛晶状体上皮细胞,当细胞生长融合后,抽提ＲＮＡ;采用Ｎｏｔｈｅｒｎｂｌｏｔ分析技术,对抽提得到的牛晶状体上皮细胞ＲＮＡ用特异的ｃＤＮＡ探针进行检测。结果在牛晶状体上皮细胞的基因转录产物中存在有ＰＡＩ－１ｍＲＮＡ的表达,所表达的ＰＡＩ－１ｍＲＮＡ碱基长度为２．３ｋｂ。结论牛晶状体上皮细胞能够分泌ＰＡＩ－１蛋白酶：