The reaction centre-light harvesting 1 (RC-LH1) complex of Thermochromatium (Tch.) tepidum has a unique calcium-ion binding site that enhances thermal stability and red-shifts the absorption of LH1 from 880nm to 915nm in the presence of calcium-ions. The LH1 antenna of mesophilic species of phototrophic bacteria such as Rhodobacter (Rba.) sphaeroides does not possess such properties. We have en...

The calcium ion-exchange moso bamboo was subjected to microwave heating investigate into the influence of ion on its pyrolysis. dependence method pyrolysis behavior also researched. calcium-loaded samples gave very different behaviors from that demineralized sample based results thermogravimetric analysis. found facilitate production solid and gaseous products at expense bio-oil. relative conte...

Calcium is necessary for multiplication of several strains of lactic streptococcus bacteriophage while not required for growth of host bacteria (Shew, 1949; Reiter, 1949; Cherry and Watson, 1949; Collins et al., 1950; Potter and Nelson, 1952b). However, the mode of action of this ion has remained obscure. Calcium action in other bacteriophage systems has been investigated, but disagreement as t...

Propofol is multiple influences on organism function that could affect gene expressions of ion channels, cause arhythmia, impair brain cognitive functions, inhibit energy metabolism and increase hypoxic tolerance. To evaluate whether these phenomena might still exist in persistent low concentration of propofol exposure. We investigated changes in the mRNA levels of Daphnia 120 ion channel genes...

In 1939 Engelhardt and Ljubimova (2) suggested that myosin (the contractile substance of muscle) and adenosine triphosphatase are probably identical, and that 'the calcium ion is a specific activator of this enzyme. Working with a myosin suspension made from rabbit muscle (by the method of Greenstein and Edsall (4) or of Weber and Meyer (11)) D. M. Needham (9) tested the activating powers of bo...

The binding of calcium ions by the isolated asialoglycoprotein receptor of hepatocytes and the inter-relationship between the calcium ion concentration and receptor function have been studied. The isolated receptor binds calcium ions only in the presence of asialoglycoprotein. The asialo-glycoprotein receptor complex binds 4 calcium ions; the binding exhibits marked positive cooperativity, and ...