The afferent innervation of the thymus gland in the rat

The afferent nervous supply to the thymus gland has been investigated by means of the retrograde transport of horseradish peroxidase. It has been shown that the thymus receives an afferent supply from the nodose ganglia of the vagus and from the dorsal root ganglia C₁–C₇. The afferent innervation of the right and left thymic lobes is bilaterally organized; the fibers of a small celled population of nodose ganglion neurons cross outside the thymus and those of a larger celled population cross within the thymus gland. The functional implications of these findings are discussed in the context of central nervous system-immune system interactions.     

The effect of the fiber components cellulose and lignin on experimental colon neoplasia

Sixty Sprague-Dawley rats were pair-fed one of three nutritionally identical diets. One diet contained “low-fiber” (3.8% crude fiber); the others contained “high fiber” (28.7% crude fiber) composed of either cellulose or lignin. Although both “high fiber” diets had similar stool bulking effects, only the cellulose diet was associated with a reduction in 1,2-dimethylhydrazine (DMH)-induced colon neoplasms. The cellulose diet was also associated with distinct changes in the gut bacterial profile and with a lowered serum cholesterol. © 1993 Wiley-Liss, Inc.     

Age, fiber type composition and in vitro contracture responses in human malignant hyperthermia

Muscle fiber typing and in vitro contracture tests were performed in 59 patients investigated for susceptibility to malignant hyperthermia (MH). Eighteen patients were found to be susceptible to MH. There was no difference in age or fiber type distribution between MH susceptible and non-susceptible patients. No correlation was found between age and fiber type distribution. Separate analyses for each diagnostic group revealed no relationship between age or fiber type distribution and response to halothane or caffeine. When all caffeine results were pooled, however, there was a significant effect of age on the caffeine specific concentration (the concentration eliciting a contracture of 1 g), but not on the caffeine threshold concentration (the minimal concentration eliciting an increase in tension). It is concluded that age and fiber type distribution have no influence on MH diagnosis, if the protocol of the European MH Group for evaluation of susceptibility to MH is followed.     

小儿与成人喉内肌肌纤维型的差异与喉功能的关系

通过对１０例小儿及２３例成年人的喉内肌进行的ｍｙｏｓｉｎ－ＡＴＰａｓｅ等染色观察，得到小儿和成人各喉内肌不同的肌纤维构成比。成人ＰＣＡⅠ型纤维最多，ＬＣＡ、ＩＮＡ及ＣＴ次之，ＴＡ最少。小儿的各喉内肌也有类似比例。表明不论小儿或成人，ＰＣＡ均具有较强的抗疲劳性，适应呼吸作用的需要；ＴＡ具有较快的收缩速度，以适应发声及呼吸道保护作用。从纤维构成上看，小儿与成人相比，各喉内肌Ⅰ型纤维较为匮乏，表明小儿的喉在发声及呼吸道保护等功能方面尚不够完善。     

玻璃纤维增强复合树脂在总义齿基托中的应用

目的：增强总义齿基托的机械性能，提高总义齿的基托抗折裂能力。方法：对E－玻璃纤维用KH－550处理剂进行表面处理后，加入总义齿基托中，制成玻璃纤维增强复合树脂。结果：经过1年的临床观察后复诊，没有发现裂纹。结论：玻璃纤维增强得合树脂可以有效地增强总义齿基托的机械性能。     

Propriospinal myoclonus: utility of magnetic resonance diffusion tensor imaging and fiber tracking.

Propriospinal myoclonus (PSM) is a rare movement disorder characterized by involuntary spinal-generated muscular jerks that spread rostrally and caudally to other spinally innervated muscles. Most patients have no clear etiology, and conventional MRI of the spinal cord is generally normal. Here we report the use of magnetic resonance diffusion tensor imaging (DTI) and fiber tracking to detect tract-specific abnormalities in a patient with propriospinal myoclonus. As the patient had the fragile-X premutation and antithyroid antibodies, spinal cord DTI abnormalities may be related to these conditions. Tract-specific analysis may provide new insights into the pathophysiology of propriospinal myoclonus.     

豆渣纤维的降脂作用及对血液流变学影响的研究

以ＳＤ大鼠为对象，研究了豆渣纤维对高胆固醇膳动物脂质代谢和血流变性的影响，并与果胶和纯纤维素进行比较，结果表明：８周实验后，豆渣与果胶组动物的血清总胆固醇（ＴＣ）和低密度脂蛋白胆固醇（ＬＤＬ－Ｃ）显著降低，但豆渣组的血脂水平比果胶组更低（Ｐ＜０．０５）。而纯纤维素组未显出降脂作用。各组大鼠的甘油三醋（ＴＧ）和高密度脂蛋白胆固醇（ＨＤＬ－Ｃ）也无明显变化。实验同时表明，６％的豆渣纤维与果胶均可使高脂大鼠的血粘度及血小板聚集率降低（Ｐ＜０．０５），且前者优于后者。相关分析显示，血脂与血流变学指标间存在显著相关性（Ｐ＜０．０５），其中ＴＣ与ＬＤＬ－Ｃ是影响血流变性的重要因素。６％的以上各种纤维摄入量均不影响大鼠的摄食量与生长。     

中空纤维超滤膜净化水质的效果评价

对中空纤维超滤膜净化水质效果的检测和评价结果显示，它能有效的滤除水中细菌，改善水质的感官性状，去除部分水中有机物，降低水中致突变活性物质的含量。提示它在预防水的生物性污染，改善水质感官性状及控制有机物污染等方面具有较高的使用价值。     

实验冻伤大鼠神经纤维的超微结构改变

为探讨冷冻损伤发生、发展及转归的规律，采用健康Ｗｉｓｔａｒ大鼠，分为冻伤组（２０只）和对照组（５只）。电镜下观察大鼠后肢冷冻至－２０℃后即刻、４小时、２４小时及７２小时时周围神经的超微结构改变。冻后即刻，神经髓鞘即出现轻度变性；冻后１～２４小时，有髓神经雪旺细胞及轴突严重变性，而无髓神经变性较轻；冻后７２小时，神经溃变及修复并存，无髓神经较有髓神经易于修复。     

螯合吸附分离功能纤维的研究进展

螯合纤堆是一类能与金属离子形成多配位络合物的纤堆状吸附功能材料，是近年来发展起来的一种新型离子交换纤堆，具有吸附选择性高、易洗脱、容易再生等优点。综述了近年来螯合纤堆的制备方法及种类，对其螯合机理进行了探讨，概括了该纤堆的应用范围并指出了其应用前景。