50种传统清热解毒药的抑菌实验

本文报告了传统药物文献收载的５０种清热解毒药的抑菌实验结果。显示抑菌作用的有４１种，占８２％。对阳性球菌显示有抑菌作用的有３６种；对阴性杆菌显示有抑菌作用的有２４种。其中的地胡椒、金果榄、毛果算盘子等显示有较广的抗菌效应，值得进一步研究。     

Early diagnosis of n-hexane–caused neuropathy

n-Hexane neuropathy was studied in 20 workers exposed for prolonged periods to this solvent, and with urinary 2, 5-hexanedione concentrations exceeding the biological exposure index recommended by the American Conference of Governmental Industrial Hygienists (5 mg/L) with a mean of 11.02 mg/L (range 5.3—24.2 mg/L). Although neurological examination did not detect significant anomalies in any of the patients, and the conduction velocity and F waves of all the nerves tested were normal, neurographic studies revealed significant differences in the amplitude of sensory nerve action potentials (SNAP) recorded from the sural (mean 14.0 μV), median (mean 17.3 μV), and ulnar (mean 7.9 μV) nerves when compared with normal values from healthy adults of the same age range, examined under identical conditions. The amplitude of the SNAP in sural and median nerves correlated significantly with the number of years worked. The notable decrease in mean amplitude of the SNAP appeared to reflect the primary neurotoxic effects of 2,5-hexanedione. © 1994 John Wiley & Sons, Inc.     

Hyperoxaluria, nephrolithiasis, nephrocalcinosis and renal failure after massive resection of the small intestine: report of a case.

Hyperoxaluria is frequently seen in patients with inflammatory bowel disease, or after resection of the ileum. It is assumed to be responsible for the development of nephrolithiasis, nephrocalcinosis (oxalate nephrosis) and progressive renal impairment in these patients. Steatorrhea may aggravate the severity of hyperoxaluria. A 60-year-old male underwent massive resection of the jejunum and ileum 10 years prior to admission, due to strangulation of the small bowel, with occlusion of the superior mesenteric artery. He remained well except for steatorrhea which developed two-and-a-half years prior to admission, when microhematuria, proteinuria and oxaluria developed progressively. Since that time, the nephrolithiasis, nephrocalcinosis and renal failure have continued to worsen despite therapy with oxalate restriction and oxalate-binding agents. A renal biopsy, performed late in the clinical course, showed severe changes in the renal parenchyma. The decline in renal function proved irreversible. The unusual metabolic consequences of massive resection of the small intestine and their mechanisms are discussed.     

Evaluation of clinical criteria for the acute respiratory distress syndrome in pediatric patients.

OBJECTIVE: The primary goal of this study was to evaluate the validity of the North American-European Consensus Committee (NAECC) definition for acute respiratory distress syndrome (ARDS) in pediatric patients. A secondary aim was to evaluate the threshold value for the PaO2/FiO2 ratio, used to determine which pediatric patients have ARDS. DESIGN: Retrospective cohort study. SETTING: Pediatric intensive care unit. PATIENTS: Pediatric intensive care unit patients who required mechanical ventilation, died, and underwent autopsy between January 1, 1996, and December 31, 2002 (n = 34). INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Clinical and chest radiograph information was collected retrospectively through chart review using a standardized data collection tool. Data included the criteria specified in the NAECC definition of ARDS and demographic information. We calculated the sensitivity, specificity, positive predictive value, negative predictive value, and likelihood ratio of clinical diagnosis of ARDS compared with a pathologic diagnosis. The threshold value of PaO2/FiO2 was identified by plotting receiver operating characteristics curves and comparing the areas under the curves. The NAECC definition yielded a sensitivity of 80.7% (95% confidence interval 60-92%), specificity of 71.4% (95% confidence interval 30-95), positive predictive value of 91.3% (95% confidence interval 70-98), negative predictive value of 50.0% (95% confidence interval 20-78), and likelihood ratio of 2.82. A PaO2/FiO2 <150 had a slightly higher (but not significantly different) specificity for ARDS than a value >200 (71% vs. 86%, p = .15) without changing sensitivity. CONCLUSIONS: Our study suggests the need for further research with larger number of children to identify an optimal Pao2/Fio2 threshold for identifying ARDS in this population.     

Loss of heterozygosity for distal markers on 22q in human gliomas.

Loss of constitutional heterozygosity as determined through the analysis of restriction-fragment-length polymorphism (RFLP) on tumoral and constitutional DNA has proven to be helpful to delimit the location of tumor-suppressor genes in the human genome. In malignant gliomas this approach indicates that chromosomes 9p, 10, 17p, and 22 may contain genes of this category involved in its origin and/or progression. Regarding chromosome 22, the data so far provided by molecular studies confirmed those previously reported by cytogenetic studies, suggesting the existence of a sub-group of malignant gliomas characterized by monosomy of this chromosome. However, the precise location of the putative glioma suppressor gene on chromosome 22 remains ambiguous. We have performed a combined cytogenetic and RFLP study on a series of 31 gliomas, looking for structural abnormalities of this chromosome. In 3 instances, terminal deletions of the long arm of chromosome 22 were observed by both methodologies, suggesting that the band q13 region distal to the D22S80 marker might be the critical domain non-randomly involved in tumor suppression of gliomas.     

药用淀粉生产工艺改进研究

用十二烷基硫酸钠或十二烷基磺酸钠与亚硫酸的混合液浸泡玉米，能有效地降低玉米淀粉中的蛋白质含量，较单独用亚硫酸浸泡，所得玉米淀粉的蛋白质含量可分别降低４０％和３５％。     

125I粒子组织间种植对人胃癌裸鼠移植瘤的杀伤作用

目的 观察不同剂量^125I粒子对人胃癌裸鼠移植瘤的杀伤作用及组织损伤。方法 建立人胃癌BGC-823细胞裸鼠皮下移植瘤模型，随机分为对照组和实验组，将不同剂量（100、120、140Gy）地^125I粒子植于实验组。30、60d：比较移植瘤抑瘤率，病理组织学、局部皮肤反应、裸鼠体重及白细胞计数。结果30d，100、120、140Gy组抑瘤率分别为51．93％、79．18％、90．22％，病理组织学反应程度多为RCRG2（45．83％），各实验组组间除120Gy与140Gy（P〉O．05）组外，及分别与对照组比较，差异有统计学意义（P〈0．05）；局部皮肤反应各实验组与对照组比较，差异有统计学意义（P〈0．05），各实验组组间差异无统计学意义（P〉0．05）。60d，各组抑瘤率分别为97．97％、100％、96．69％，病理组织学反应程度以RCRG1居多（62．5％），与对照组比较，差异均有统计学意义（P〈0．05），各实验组组间差异无统计学意义（P〉0．05）；局部皮肤反应随剂量增高而加重，各实验组组间及其分别与对照组比较，差异有统计学意义（P〈0．05）。结论 不同剂量的^125I粒子在不同时间对人胃癌裸鼠皮下移植瘤有显著杀伤作用，但120Gy和140Gy组随剂量累积，损伤明显增加。提示100Gy可能是治疗人胃癌裸鼠皮下移植瘤的有效剂量。     

大学生生涯规划及其对护理教育的意义

对大学生生涯规划及国内外研究状况进行综述，指出生涯规划对护理教育的意义，提出在高等护理教育中加强大学生的生涯规划将是我国护理教育的主要发展方向之一。