44 research outputs found

    Fundamental Studies on Measurement of Plasma lα,25-Dihydroxycholecalciferol Concentration by Radioreceptor Assay

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    It is well known that 1α,25-dihydroxyvitamin D(lα,25 (OH)2D) plays an important role in the pathophysiology of bone and calcium metabolism. In present paper, we established a relatively convenient assay system, using radioreceptor assay, for lα,25 (OH) 2D. Fundamental studies showed that this assay system had good sensitivity enough to detect 2 pg of lα,25 (OH) 2D per tube, and had good reproducibility. Therefore, it was shown that this assay system could be applied for clinical use. The plasma concentrations of lα,25(OH)2D, measured by this assay system, in healthy young males and females, and in aged females were 55.7±16.1, 44.8±22.1 and 23.5±13.0 pg/ml (mean±s.d.), respectively. Thus, the aged females showed significantly lower (p<0.005) lα,25 (OH)2D levels than the young group. This fact suggests that vitamin D deficient state might exist in aged females

    Measurement of Ionized Calcium as Supplementary Marker of Bone Metastasis in Breast Cancer

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    The serum concentrations of ionized calcium (iCa), corrected automatically for serum pH, were measured in 67 cases with breast cancer (16 positive cases and 51 negative cases for bone metastasis). The serum concentration of iCa in the cases of positive bone metastasis was significantly higher than that in the negative cases (p<0.005). As osteoclastic bone metastasis occurred frequently in breast cancer, the measurements of serum concentrations of iCa might be of help as a supplementary marker of the diagnosis of bone metastasis

    A Newly Developed Instrument of Dual Photon Absorptiometry for Bone Mineral Analysis of the Lumbar Vertebra: Study in Control and Aged Females

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    In order to determine the quantitatively bone mass, dual photon absorptiometry instrument using a scintillation camera was newly developed, and its basic performance was described. Furthermore, with this instrument, bone mineral at 3rd lumbar vertebra was measured in 57 women (31 controls: age 29.9±6.4 yrs., and 16 seniles: age 67.7±6.6 yrs.). The aged females, compared with the young control females, showed significantly low the all parameters of bone mineral such as bone mineral content (BMC), bone mineral density and total BMC at 3rd lumbar vertebra. Thus, it was shown that assessment of bone mineral with this instrument provided a useful information in the diagnosis of osteoporosis

    Scintigraphic Findings of Bone and Bone-Marrow and Determination of Bone Mineral Density Using Photon Absorptiometry in Osteopetrosis

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    On a 15-year-old girl with osteopetrosis, bone and bonemarrow scintigraphy were performed. Also, bone mineral density (BMD) with quantitative CT (QCT), single photon absorptiometry (SPA) and dual photon absorptiometry (DPA) were measured. On bone scintigraphy the diffusely increased skeletal uptake and relatively diminished renal uptake were noted. On the other hand, on bone marrow scintigraphy poor accumulation in central marrow and peripheral expansion were shown. BMD value by QCT and DPA (mainly trabecular bone) was markedly high, while BMD by SPA (mainly cortical bone) was within normal range. Thus, it was shown that bone and bone-marrow scintigraphy combined with BMD measurement by photon absorptiometry were useful and essential in evaluating the pathophysiology of osteosclerosis

    給食管理実習中の手拭の細菌汚染(自然科学)

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    集団給食作業中に使用された手拭の細菌汚染の実体を明らかにすることを目的として研究した。1)給食実習の調理に使用した手拭には,一般生菌10^7,大腸菌群10^4,ブドウ球菌10^4程度の細菌が汚染していた。2)手拭を汚染している細菌群は,水道水,中性洗剤の使用による洗浄によっても容易に除去されず,一般生菌,大腸菌群,ブドウ球菌など多数が残存した。3)手拭は洗浄後できるだけ速やかに乾燥しなければ,汚染細菌が著しく増殖するので,調理に使用した手拭は,洗浄,加熱殺菌,乾燥などの処理が衛生上必要である。4)手拭を汚染していた大腸菌群の中には,Escherichia coli, Citrobacter freundii, Klebsiella pneumonia, Enterobacter cloacaeなどに属する菌株が含まれ,特にEscherichia coliに属するものが最も多く分離され,ふん便からの汚染の可能性が示唆された。5)分離した34菌株のブドウ球菌は,7.5%NaCl培地中ですべてよく増殖し,10%NaCl培地では70%が増殖し,15%NaCl培地ではすべて増殖しなかった。また分離菌株中28菌株(82%)がmannitを分解した

    外国産胡麻の成分に関する研究(自然科学)

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    現在わが国では胡麻はほとんど輸入に依存しており,その量は年間約8万トンに達する。わが国への胡麻の輸出国は20ヶ国にもおよび,その量は年により変遷がある。本報告では,スリランカ産,ガテマラ産,タイ産,中国産,メキシコ産,スーダン産,エルサルバドル産,コロンビア産の輸入胡麻について,それらの一般成分,蛋白質のアミノ酸組成について検討した。一般成分分析では,粗灰分は4.02~6.18%で,タイ産黒胡麻が比較的多いほかは,他は余り差が認められなかった。粗脂肪含量は43.97~55.38%で,9試料中6試料は50%以上,多いものでは55%をこえるものもあった。粗蛋白質含量は16.13~23.13%で,胡麻種子の脱脂・脱水物に換算すると,含量は34.28~51.65%で,脱脂粕は高蛋白質含有資源であることが分った。粗繊維の含量は4.19~11.84%で,試料によってかなりの差があり黒胡麻に多い傾向があった。蛋白質のアミノ酸組成では,全般的にグルタミン酸,アルギニン,アスパラギン酸が多いことが分り,味覚の点での期待が考えられる。必須アミノ酸では,アルギニン,ロイシン,バリンなどの含量が比較的多かった。またそのアミノ酸組成からして,胡麻油しぼり粕中の蛋白質は高い栄養価をもつことが示唆された。本研究を行なうにあたり種種御支援をいただいた,四日市市九鬼産業株式会社に御礼を申し上げる
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