Angiogenic tumor in the small intestine. A case report and review of the literature published in Japan

1) A rare case of such angiogenic tumor in the duodenum as presumed to be hemangioblastoma was reported in detail. 2) Cases of angiogenic tumor in the small intestine reported in Japan were reviewed and summarized.

Human lymphocyte antigen, HL-A27, in Japanese patients with ankylosing spondylitis

A high association of HL-A27 specificity with ankylosing spondylitis was found in Japanese patients in spite of a very low frequency of this specificity in a normal Japanese population. These findings coincide well with those in Caucasian patients, and indicate the strong relationship between the susceptibility to ankylosing spondylitis and HL-A27 specificity beyond racial differences. No particular HL-A patterns were noted in patients with the ossification of the posterior longitudinal ligament of the cervical vertebrae. This observation provides an evidence that this disease is etiologically different from ankylosing spondylitis.

Silica gel medium for enumeration of petroleumlytic microorganisms in the marine environment

A silica gel medium was developed for the enumeration of petroleumlytic microorganisms in the marine environment. The medium was satisfactorily used for the investigation of the vertical distribution of bacteria in seawater from the surface to 1,000 m depth of western north Pacific central water as well as the neritic region of Japan.

Marine Bacteria and Other Heterotrophs as Food for Zooplankton in the Strait of Georgia during the Winter

Microbiological investigation was carried out in the waters of the Strait of Georgia during the winter to study the occurrence of heterotrophic microorganisms in relation to other particulate organic materials, including plankton and detritus. High microbial activity was measured in the euphotic zone, where marine bacteria and allied microorganisms were chiefly found on the particulate matter having diameter less than 25 μ. Their standing crop was estimated by different methods to be between 40 and 3000 mg C/m2 and some of this was consumed by the zooplankton, which were found to have concentrated the bacteria by a factor of around 105. Only the highest levels of microbial production were estimated to be sufficient for the growth of zooplankton and generally the bacterial activity was only sufficient to support a subsistence level of life for marine copepods in the Strait of Georgia.