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Coral reefs are sites of high nitrogen-fixation activity by cyanobacteria (Capone 1988). To evaluate the contribution of fixed nitrogen in coral reef nutrient cycles, most research has used the acetylene-reduction method to measure the rate of fixation in algal mats, bare rocks, and living corals (Webb et al. 1975; Wiebe et al. 1975; Crossland and Barnes(More)
BACKGROUND We assessed our outcomes using an intercostal muscle flap harvested with cautery prior to chest retraction. METHODS Our retrospective study was conducted using an electronic prospective database. RESULTS There were 456 patients (348 men) over a six year period. The intercostal muscle flap was used for bronchial coverage in 391 patients. The(More)
Concentrations and accumulation profiles of PCDDs/DFs and coplanar-PCBs (co-PCBs) in aquatic biota (e.g., plankton, shellfish, benthic invertebrate, and fish) and sediment from Tokyo Bay were examined to elucidate the relationship between bioaccumulation and trophic level in the food web as determined by the stable nitrogen isotope analysis. Bioaccumulation(More)
Hepatic portal venous gas is easily diagnosed radiographically by the appearance of tubular lucencies branching horizontally from the porta hepatis and extending to within 2 cm of the liver capsule. Associated conditions vary from benign to potentially lethal diseases which require emergency operations. A case of hepatic portal venous gas secondary to small(More)
On the basis of congener-specific analysis of dioxins in a dated sediment core, the sources and behavior of dioxins in Lake Shinji Basin, Japan, were estimated. The dioxins in the core showed that their deposition in the lake increased rapidly during the 1960s, peaked in the early 1970s, and then decreased gradually. Principal component analysis of the(More)
 The natural carbon and nitrogen stable isotope ratios (δ13C, δ15N) of various autotrophs and heterotrophs were measured in a Syringodium isoetifolium-dominated seagrass bed at Dravuni Island, Fiji to define carbon and nitrogen sources for heterotrophic organisms in a system where few animals graze directly on seagrass leaves. The organic carbon, nitrogen,(More)
Long-term changes in Secchi disk transparency in Lake Nakaumi, Japan, from 1932 to the present, which includes the periods before and after the loss of eelgrass (Zostera marina L.) beds, were compiled from previous reports. During the first (July 1932–February 1934) and the second (January 1949–November 1950) periods, the mean transparency was greater than(More)
Calcification by charophytes improves the quality of water, although most studies on calcification have only examined ecorticate species. We investigated the formation and relationship of alkalines and acids with regard to calcification on internodal cells in Chara corallina, an ecorticate species, and Chara globularis, a corticate species. We observed that(More)
In this study, the relationship between water quality (as represented by major inorganic ion concentrations) and land use characteristics is examined for a small river basin which runs through the urbanizing area of central Japan. Water samples were taken from 24 sites at base flow and analyzed, and the proportions of the various land uses associated with(More)
As expressed in the Ramsar Convention, the wise use of wetlands, including coastal lagoons, is one of the greatest environmental concerns across the globe. Seagrass beds are the key element for sustaining coastal lagoon ecosystems. Eutrophication, especially by nitrogen and phosphorus, has degraded many coastal waters and has been invoked as a major cause(More)