Hurler's syndrome: deficiency of a specific beta galactosidase isoenzyme

A marked deficiency of a specific thermolabile beta-galactosidase isoenzyme (pH optimum 3 to 5) was found in liver and kidney tissues of five patients with the Hurler's syndrome (types 1 to 3).     

Opiate receptor: demonstration in nervous tissue

Tritiated naloxone, a powerful opiate antagonist, specifically binds to an opiate receptor of mammalian brain and guinea pig intestine. Competition for the opiate receptor by various opiates and their antagonists closely parallels their pharmacological potency. The opiate receptor is confined to nervous tissue.     

Differentiated rat glial cell strain in tissue culture

Rat glial tumors, induced by injections of N-nitrosomethylurea, were plated and propagated in culture. Among a few cell strains obtained, one clone contains S-100 protein, which is unique to brain in vertebrates. Stationary-phase cultures contain approximately ten times more S-100 protein per cell than exponentially growing cells. When injected into newborn rats, cells producing S-100 grew as a glial tumor, which contained S-100 protein.     

Acid polysaccharides from invertebrate connective tissue: phylogenetic aspects

Polyfucose sulfate and a chondroitin sulfate were isolated from echinoderm connective tissue. Coelenterate and poriferan connective tissues were devoid of these acid polysaccharides.     

Cell culture on artificial capillaries: an approach to tissue growth in vitro

Artificial capillaries perfused with culture medium provide a matrix in which cells can attain tissue-like densities in vitro. Products secreted into the medium can be measured as indicators of cell function or may be recovered for other purposes without disturbing the culture.     

Myxovirus antibody increases in human connective tissue disease

Antibodies to measles and parainfluenza type 1 viruses were significantly increased in systemic lupus erythematosus and Reiter's syndrome. Of the individuals with highest titers of measles antibody, 75 percent had neurologic illness. Persistent virus infection may be a factor in the pathogenesis of these diseases.     

三角帆蚌外套膜细胞培养与组织培养的比较

通过对三角帆蚌外套膜外表皮进行组织培养和细胞培养的比较研究，表明组织培养比细胞培养更易获得大量游离细胞。并且通过原子吸收光谱分析，证明体外培养的三角帆蚌组织和细胞皆能正常分泌珍珠质，且两者的分泌能力大体相同。     

三角帆蚌外套膜细胞培养与组织培养的比较

通过对三角帆蚌外套膜外表皮进行组织培养和细胞培养的比较研究，表明组织培养比细胞培养更易获得大量游离细胞。并且通过原子吸收光谱分析，证明体外培养的三角帆蚌组织和细胞皆能正常分泌珍珠质，且两者的分泌能力大体相同。     

Morphogenesis of syncytiotrophoblast in vivo: an autoradiographic demonstration

In an in vivo autoradiographic study of immature primate trophoblast, tritiated thymidine was first found only in nuclei of cytotrophoblast but after 22 hours, labeled nuclei appeared in syncytiotrophoblast as well. Hence syncytiotrophoblast of the monkey appears to originate by differentiation of cytotrophoblast.     

Endotoxin: stimulation of bone resorption in tissue culture

Bacterial endotoxins can stimulate the release of previously incorporated calcium-45 and tritiated proline from fetal rat bone in tissue culture. Endotoxin from Bacteroides melaninogenicus, an organism regularly found in the gingival crevice of man, produces a response similar to parathyroid hormone and is effective at doses as low as 0.1 microgram per milliliter. This response is inhibited by serum and dependent upon the presence of albumin. Endotoxins may play a role in the bone loss characteristic of human periodontal disease.     

植物组织培养中降低培养基成本的研究

在马铃薯、菊花和满天星的发根阶段研究了用自来水代替蒸馏水、白糖代替蔗糖的可行性．结果表明：马铃薯、菊花和满天星培养苗的生长在蔗糖与白糖、蒸馏水与自来水的处理间无显著性差异，因此规模化生产上配制培养基时用白糖取代蔗糖，自来水取代蒸馏水完全可行．     

茶树组织培养研究进展

对茶树组织培养技术在茶树种苗快速繁殖、辅助育种、次生代谢产物生产等方面的应用进行综述,阐述了以茶树根、茎、花、种子等为外植体开展的组织培养的培养基研究,并提出组织培养过程中产生褐化、污染的原因及控制对策。