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Characterization of Clay Minerals in Ranch Pasture
강상재,장정훈,박나윤,박준홍,최세영,박만,이장희,이동훈,장용선 한국토양비료학회 2016 한국토양비료학회지 Vol.50 No.4
This study deals with the distribution of the clay minerals separated from clay fractions of ranch pastures in Korea and their chemical and mineralogical properties. Crystalline phases of the clay minerals were identified by powder X-ray diffraction (XRD) pattern and FT-IR spectra, and their relative chemical compositions were also analyzed by X-ray flourescence spectrometry (XRF). Primary minerals consisted mainly of quartz and mica and chlorite and kaolinite along with a trace of swelling micas were identified as secondary clay minerals. However, the relative content of these clay minerals was different with the locations, which led to significant effects on physical and chemical properties of soils like inorganic elemental composition. In particular, SiO2 content was higher in Gochang ranch pasture than in other ranch pasture. Infrared (IR) spectra did not indicate any significant differences in organic functional groups among the locations. This study clearly showed that ranch pastures had different relative content of clay minerals and chemical properties depending on the location and consequently that those properties are worthy to be taken into account for soil amendment.
강상재,한창섭,최성협,김종덕 인제대학교 1988 仁濟醫學 Vol.9 No.2
The retrocaval ureter is a rare congenital venous anomaly in which ureter passes behind the inferior vena cava, leading to varying degrees of ureteral compression. This condition was first described by Hochstetter in 1893. We report a 54 years old male patient who was admitted to our hospital due to intermittent right flank dull pain and managed with the diagnosis of retrocaval ureter. An IVP demonstrated delayed excretion on the right side with pyelocaliectasis and ureterectasis of the upper third of the ureter on subsequent films. A combined retrograde pyelogram and venacavogram delineated the retrocaval ureter. After the ureter was excised and relocated anterior to the vena lava, spatulated end to end anastomosis was made.
강상재,이창희,박만 한국토양비료학회 2016 한국토양비료학회지 Vol.50 No.4
Plants response to phosphate starvation include the changes of activity of some enzymes, such as phosphatases, fructose-1,6-bisphosphatase, sucrose-phosphate synthase and nitrate reductase. In this study, to determine the effects of phosphate starvation on the change of activities of acid and alkaline phosphatase, fructose-1,6-bisphosphatase, sucrose-phosphate synthase, and nitrate reductase were studied in melon seedlings (Cucumis melo L.). The content of the protein and chlorophyll tended to relatively reduced in melon seedlings subjected to phosphate starvation. Acid phosphatase activity in first and second leaves of melon seedlings was relatively higher than that of third and fourth leaves of seedlings in 14 days after phosphate starvation treatment, respectively. Active native-PAGE band patterns of acid phosphatase in melon leaves showed similar to activities of acid phosphatase, whereas alkaline phosphatase activity was different from the change in the activity of acid phosphatase. Inorganic phosphate content in melon seedlings leaves was constant. The changes of Fructose-1,6-bisphosphatase and sucrose phosphate synthase activities showed similar patterns in melon seedlings leaves, and between these enzymes activities and phosphate nutrition negatively related. Fructose-1,6- bisphosphatase and sucrose phosphate synthase activities showed significant difference in second and fourth leaves, but nitrate reductase showed significant difference in first and second leaves in 14days after phosphate starvation treatment. We concluded that phosphate nutrition could affect the distribution of phosphate, carbon and nitrogen in melon seedlings.