UpToDate Contents
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
English Journal
- Pancreatic calcification: formation constants of CaHCO3+ and CaC03(0) complexes determined with Ca2+ electrode.
- Moore EW, Verine HJ.AbstractPancreatic calcification is a frequent complication of chronic pancreatitis, and pancreatic stones (95% CaCO3 as calcite) are observed in both humans and cattle, but little is known about the complex equilibriums governing calcium solubility. Using the Ca2+ electrode and equilibrium dialysis of NaHCO3-CaCl2-NaCl solutions (24 +/- 2 degrees C; total ionic strength = 0.153-0.161), studies were made at variable pH and total calcium and carbonate concentrations to determine the formation constants of the three possible calcium complexes: CaHCO3+, CaC03(0), and Ca(HCO3)20. If the first two complexes were present, a plot of ([Ca]/[Ca2+]-1)/[HCO3-] against the ionic ratio [C03(2)-]/[HCO3-] should be linear with intercept of the CaHCO3+ formation constant (K'aB) and slope of the CaC03(0) formation constant (K'aC). This was found to be the case in both dialysands and dialysates, using two different methods ("pH" and "K'sp") for estimation of [CO32-] values. Two other methods of data analysis were also used: simultaneous equations and multiple linear regression by matrix analysis. For all three methods, mean K'aB = 12.48 and mean K'aC = 1,870. There was no evidence for a Ca(HCO3)2(0) complex. We conclude that CaHCO3+ and CaC03(0) complexes may account for a substantial fraction of total soluble calcium is pancreatic juice. These studies provide a necessary step toward the construction of a quantitative physicochemical model of pancreatic calcium solubility.
- The American journal of physiology.Am J Physiol.1981 Aug;241(2):G182-90.
- Pancreatic calcification is a frequent complication of chronic pancreatitis, and pancreatic stones (95% CaCO3 as calcite) are observed in both humans and cattle, but little is known about the complex equilibriums governing calcium solubility. Using the Ca2+ electrode and equilibrium dialysis of NaHC
- PMID 7270696
- [Effect of CaC03 on the phosphatase activity in a culture of Actinomyces sp., strain 5 (coelicolor group) producing exonuclease A5].
- Tatarskaia RI, Artamonova OI, L'vova TN, Koreniako AI.
- Mikrobiologiia.Mikrobiologiia.1972 Jul-Aug;41(4):621-5.
- PMID 4343552
Japanese Journal
- ポリ塩化ビニル/塩素化ポリエチレン/炭酸カルシウム複合材料の衝撃強度に及ぼすエチレン-エチルアクリレート共重合体およびエチレン-酢酸ビニル共重合体の添加効果
- 永田 員也,日笠 茂樹,岩蕗 仁
- Journal of The Adhesion Society of Japan 40(4), 152-158, 2004
- … PVC/CPE(7phr)/CaC03(30phr)にEEAおよびEVAの添加効果を検討した結果,EVAを3phr添加した場合,衝撃強度は10から33kJ・m-2へと向上し,EEAの場合はIphr以上の添加で約47kJ・m-2以上と大きく改善した。 …
- NAID 130004708085
- 田野崎 真司,佐々木 芳彰,高木 理彰 [他],石川 朗,鈴木 上太,稲毛 弘樹,江森 亮太,湯浅 哲也,谷口 宏,DEVARAJ Balasigamani,赤塚 孝雄
- 電子情報通信学会技術研究報告. MI, 医用画像 102(577), 47-52, 2003-01-17
- … CTはサブミリメータの高い空間分解能で骨領域を描出できることがわかった.次に,定量計測の可能性を示すために,ウレタン樹脂の中にCaCO3を混ぜた後に凝結させた,CaCO3密度の異なる3つの骨ファントムを画像計測した.再構成画像内にROIを設定し,その内部の画素値とCaC03密度を比較した結果,両者の間に良好な直線性が存することを確認した.これらの結果は,骨の病態を画素値によって診断することが可能であることを示す. …
- NAID 110003171840
- ポリ塩化ビニル-塩素化ポリエチレンブレンドの力学特性に及ぼす炭酸カルシウムの添加効果
- 永田 員也,藤原 和子,日笠 茂樹,児子 英之,伊藤 亮治
- Journal of The Adhesion Society of Japan 39(1), 4-13, 2003
- ポリ塩化ビニル(PVC)に10phrまでの塩素化ポリエチレン(CPE)および平均粒子径が0.6,0.9,2.0μmのステアリン酸改質炭酸カルシウム(CaCO3)をロールにより混練した。PVC/CPE/CaCO3ブレンドに0.9μm以下のCaCO3を添加することによりその衝撃強度はある特定のそれぞれのブレンド量において60kJ・m-2以上へ急激に増加した。一方,2.0μmのCaCO3ではCPEを体積 …
- NAID 130004708067
Related Pictures