Ultrasonic study in thoracoscopic operations]

Inhibition was studied of H-reflex of musculus soleus in patients (n = 31) with posterocapsulolenticular, anterocapsular, lenticular, thalamic, and corticosubcortical locations of hemispheric insult. Relationship was demonstrated of the pathological focus localization to abnormalities in the H-reflex inhibition, the most pronounced of them being recordable in patients presenting with complete damage to the posterior limb of the internal capsule.     

Improved technique for cervical metrizamide myelography

Introduction of metrizamide into the lumbar subarachnoid space with the patient in a prone 15-20 degree head-down position improves delivery of contrast material for cervical myelography. Excellent visualization of the spinal cord and nerve roots has resulted using this technique.     

A new bone/blood index in the study of labelled citrate metabolism in rat bones in fracture, deafferentation, rickets, and caries]

A new bone/blood index has been developed which is calculated by dividing % of radionuclide inclusion in the bones by % of the inclusion in the serum. Graphic image of the index changes with time is significantly more demonstrative than digital tables and allows one not only easily measure distribution of the labelled compound between fractions diluted in the blood and sorbed on the bone but also specify a major direction of their transport between blood and bone. The index confirms the presence of biphasic primary fast but weak physical adsorption and secondary slow and strong chemisorption. This was established by the study of time course of the labelled citrate in intact rats of different age as well as in fracture and bone innervation defect, in rickets and dental caries. The proposed index can be applied in investigation of various diseases.     

Attachment of thioglycosides to proteins: enhancement of liver membrane binding

Thioglycosides of D-galactose, D-glucose, N-acetyl-D-glucosamine, and D-mannose were covalently attached to Aspergillus oryzae alpha-amylase, hen's eggs lysozyme, and bovine serum albumin by amidination, diazo coupling, and amide formation. The binding of the newly formed glycoproteins (neoglycoproteins) to rabbit liver membranes was measured, using asialoorosomucoid as a reference. Attachment of D-galactosides by any of the three methods enhanced binding by several orders of magnitude. Coupling of a comparable number of D-mannosides or N-acetyl-D-glucosaminides had little or no effect. Attachment of D-glucosides also enhanced binding but to a variable extent depending on the method of attachment. Thus, the behavior of neoglycoproteins toward rabbit liver membranes closely paralleled that of serum glycoproteins (Ashwell and Morell, 1974) with respect to sugar specificity.     

油底壳一次拉延的计算机仿真与实验验证

采用独立研制的板材冲压成形ＣＡＥ软件系统ＫＭＡＳ,对第一汽车集团公司小红旗轿车４８８发动机油底壳的深拉延成形的过程进行了计算机模拟仿真并与实验结果进行了比较,表明,了ＫＭＡＳ软件的可靠性;通过对拉延模具结构与成形笥的分析,将原来的二次拉延工艺改为一次拉延获得成功,为企业解决了关键性的技术难题。     

Formation of unidirectional nanoporous structures in thickly anodized aluminum oxide layer

A series of anodic aluminum oxide(AAO) was grown on the commercially pure 1050 aluminum sheet by controlling electrolyte temperature (2–15 °C) and an odizing time (0.5–6 h), using a fixed applied current density of 3 A/dm² in diluted sulfuric acid electrolyte. A crack-free thick AAO with the thickness of 105–120 μm and containing unidirectional nano sized pores (average pore diameter of 5–7 nm) is successfully achieved in the specimens anodized for 2 h, irrespective of electrolyte temperature. When anodizing time reaches 6 h, very thick AAO with the thickness of 230–284 μm is grown, and average diameter of unidirectional pores is in the range of 6–24 nm. The higher values in both the AAO thickness and pore diameter are attained for the specimens anodized at higher temperatures of 10–15 °C. A crack is observed to exist in the AAO after anodizing up to 4 h and more. A higher fraction (more than 9%) of the crack is shown in the specimens anodized at higher temperatures of 10–15 °C for 6 h and a considerable amount of giant cracks are contained.     

报废硝酸-20L分离再用技术研究

对报废氧化剂硝酸-20L分离再用技术进行了研究,确定了报废氧化剂的处理方法为硝酸镁精馏脱水法。该法可将报废氧化剂处理为合格的军用氧化剂硝酸-20L,还可将其分离为浓硝酸和四氧化二氮民用化工产品。