Improving the accuracy of secondary structure predictions

The present paper studies the way of introducing in secondary structure predictions the different kinds of interactions which infer on the protein folding. An estimation of the expected improvement is given in the different cases.     

Marker-assisted introgression of 4 Phytophthora capsici resistance QTL alleles into a bell pepper line: validation of additive and epistatic effects

The aim of the present study was to transfer resistance to P. capsici alleles at four quantitative trait loci (QTLs) from a small fruited pepper into a bell pepper recipient line using markers. The marker-assisted selection program was initiated from a doubled-haploid line issued from the mapping population and involved three cycles of marker-assisted backcross (MAB). Two populations, derived by selfing the plants selected after the first selection cycle, were genotyped and evaluated phenotypically for their resistance level. The additive and epistatic effects of the four resistance factors were re-detected and validated in these populations, indicating that introgression of 4 QTLs in this MAB program was successful. A decrease of the effect for the moderate-effect QTLs and of the epistatic interaction was observed. Phenotypic evaluations of horticultural traits were performed on sample of each backcross generation. The results indicated an efficient return to the recipient phenotype using this MAB strategy.     

微波加热时基托树脂收缩量的研究

目的,针对基托树脂固化的特性,探讨微波加热对树脂收缩量的影响。方法:采用四种常用基托树脂,分别采取单纯微波固化和微波加压固化聚合后,测定开盒后一周内树脂的聚合收缩情况。结果:两种固化方法收缩量均较小,适应性强。微波加压固化虽收缩量相对稍大但收缩均匀各树脂间无显著差异。结论:微波加热固化清洁高效,基托树脂结构致密,收缩量小,是今后树脂固化的一个发展方向。     

Tetracycline Staining of Newly Forming Bone and Mineralizing Cartilage in Vivo

Achromycin is given to patients or laboratory animals in doses of 1.0 gm/75 Ib of body wt/24 hr for 3 days, and 2 or more days allowed to elapse before biopsy or sacrifice. Undecalcified sections of bone are then made by Frost's method (Stain Techn., 33, 273-7, 1958) and stained in 1.0% basic fuchsin in 40% ethanol. The achromycin is found deposited in bone mineralizing during the period of drug administration. It develops a visible yellow color, which can be seen by ordinary bright-field microscopy, and which is colorfast and free from diffusion or translocation. It is possible to measure the width of lamellae of bone so labelled and in this manner study osteoblastic activity.     

Long-term Study of Disodium Cromoglycate in Treatment of Severe Extrinsic or Intrinsic Bronchial Asthma in Adults

The results are reported here of a long-term double-blind controlled clinical trial of disodium cromoglycate (D.S.C.G.) and isoprenaline, D.S.C.G. alone, isoprenaline alone, and a placebo given as a powder for inhalation in the treatment of severe bronchial asthma.At the end of one year 16 out of 20 patients on D.S.C.G.-isoprenaline remained on the allocated capsules, compared with 10 out of 15 on D.S.C.G., 5 out of 20 on isoprenaline, and 3 out of 19 taking the placebo. The differences between each of the D.S.C.G.-isoprenaline and D.S.C.G. regimens compared with the isoprenaline and placebo regimens were statistically significant. After eight weeks on four capsules a day the patients in each group were allocated at random so that half continued on full dosage and half on a reducing regimen. At the end of the year there was no significant difference in the failure rate between patients allocated the full dosage and the patients on the reducing dosage. The capsules were well tolerated and toxicity to D.S.C.G. was not observed.     

滑环技术在CT设备中的应用

本文指出传统ＣＴ图像存在的缺陷及不足之处；介绍新一代高、低压滑环及螺旋ＣＴ实现快速连续扫描的原理和优越性，便于了解其基本知识。     

医院设备的接地方式探讨

本文根据某些医院设备接地方式上存在的问题提出了十条改进意见，并建议制订了《医院设备接地方式指南》强制性规范，改善防电击安全性。