Hypersensitization to human menopausal gonadotropins with anaphylactic shock syndrome during a fifth in vitro fertilization cycle

Conclusion Allergic reactions to therapies with human urinary-derived gonadotropins are of a low incidence. They may, however, have serious consequences as reported in our case study. In our opinion, they are probably related to the presence of copurified urinary proteins. One might hypothesize that highly purified and/or recombinant human gonadotropins will reduce this incidence yet further in the future.     

Image analysis of endodontic radiographs: digital subtraction and quantitative densitometry

Abstract In this study computerized image analysis procedures were applied to endodontic radiographs. Kontron IBAS 2000 is a commercially available image analysis system with processing routines applicable to radiograph digitizing and transformations. The system was evaluated for: its ability to harmonize blackening and contrast in endodontic radiographs; its ability to compensate for angulation distortion of sequential exposures of individual teeth; its potential for application of digital subtraction methods; and its use in automated gray-level analyses of diseased and healthy bone areas in endodontic radiographs. The Kontron IBAS 2000 system proved suitable for all applications. However, the specificity of the subtraction procedure was limited by some inherent problems in the harmonization of blackening and in the subtraction process itself. On the other hand, automated gray level measurements proved to be a robust method for unbiased and quantitative assessment of healing of apical periodontitis.     

Low T3 syndrome in patients following major surgery

Time sequence and specificity of thyroid hormones and biochemical parameters were investigated in patients following major surgery. Serum concentration of triiodothyronine decreases significantly following operation, with a biphasic regression. There is a reciprocal change in serum reverse triiodothyronine levels, but serum thyroxine levels show no significant change after operation. The significant decrease in serum concentration of alpha-2-macroglobulin and antithrombin III during and after surgery is the result of consumption of these inhibitors because the reciprocal change in serum concentration of elastase-like protease has been recognized. According to the change of curvilinear regression of serum triiodothyronine levels, 14 patients were grouped into 3. The patients for whom the curvilinear regression resembled a polynomial of degree 3 and 2 had a good prognosis, but the remaining 4 with no significant curvilinear regression had major complications and 2 died. It is meaningful that the postoperative change of triiodothyronine levels relates to the clinical outcome, to some degree.     

维生素E电化学氧化机理的光谱电化学表征

用循环伏安法,研究了维生素E在热解石墨电极的电化学氧化反应机理。分析了反应历程。实验结果表明,维生素E在热解石墨和铂电极的电极过程为受扩散控制的准可逆ECE电极过程。用网状石墨和状铂电极的紫外吸收光谱电化学的实验结果为上述机理提供了依据。     

Dynamic variable background subtraction: a simple means of displaying radiolabeled monoclonal antibody scintigrams

Subtraction of a nonspecific radionuclide is frequently used to enhance visualization of tumors imaged by radiolabeled monoclonal antibodies. Determining the optimal amount of the nonspecific radionuclide image to subtract can be difficult. We have developed a computer program that generates a closed-loop cinematic display in which a continuously varying amount of the nonspecific radionuclide image is subtracted from the specific antibody image. Through examination of this dynamic display, a broad range of background-subtracted images can be viewed expeditiously in an effort to select the optimal level of background subtraction. This method may be useful in routinely displaying such background-subtracted studies.