Stimulation of human neutrophils with f-met-leu-phe, platelet-activating factor, or leukotriene B4 resulted in an increase in [Ca2+]i. The [Ca2+]i rise was greater in the presence than absence of external Ca2+; the component that was dependent on external Ca2+ was blocked by Ni2+, or could be reconstituted by addition of external Ca2+ following discharge of the internal Ca2+ store. These measur...

All-inorganic metal halide perovskite nanocrystals (NCs) having the general formula ABX3, where A is a monovalent cation, for example, Cs+, B divalent typically Pb2+, and X Cl–, Br–, I–, or their binary mixture, show potential in optoelectronic devices. In this work, we explore effect of B-site doping on properties CsPbX3 NCs (X = Br, Cl). First, Pb2+ ions pristine CsPbBr3 NC are partially subs...

We have continued our investigations in Transition Metal Impurities in Silicon. We have been concentrating on single TM ions in silicon, specifically Mn0, V2+, Cr+ and Mn2+ in larger clusters, testing for convergence with respect to cluster size. The probable locations of the isolated ions were determined by first-principles investigations of their binding energies at different sites using Hart...

A Pseudomonas putida strain, strain GB-1, oxidizes Mn2+ to Mn oxide in the early stationary growth phase. It also secretes a siderophore (identified as pyoverdine) when it is subjected to iron limitation. After transposon (Tn5) mutagenesis several classes of mutants with differences in Mn2+ oxidation and/or secretion of the Mn2+-oxidizing activity were identified. Preliminary analysis of the Tn...

Theoretical study of the crystal field parameters and zero-field splitting parameter Mn2+-doped langbeinite Tl2Cd2(SO4)3 single crystals is done using superposition model perturbation theory. The found here matches well with experimental value. theoretical supports conclusion that Mn2+ substitutes for Cd2+ in crystal.

Nanoparticle drug delivery carriers, which can implement high performances of multi-functions, are of great interest, especially for improving cancer therapy. Herein, we reported a new approach to construct Mn2+-coordinated doxorubicin (DOX)-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles as a platform for synergistic chemo-photothermal tumor therapy. DOX-loaded PLGA (DOX/PLGA) nanopa...

ScaA lipoprotein in Streptococcus gordonii is a member of the LraI family of homologous polypeptides found among streptococci, pneumococci, and enterococci. It is the product of the third gene within the scaCBA operon encoding the components of an ATP-binding cassette (ABC) transporter system. Inactivation of scaC (ATP-binding protein) or scaA (substrate-binding protein) genes resulted in both ...

The effects of arachidonic acid and thrombin on calcium movements have been studied in fura-2-loaded platelets by a procedure which allows simultaneous monitoring of the uptake of manganese, a calcium surrogate for Ca2+ channels, and the release of Ca2+ from intracellular stores. Arachidonic acid induced both Ca2+ (Mn2+) entry through the plasma membrane and Ca2+ release from the intracellular ...

It is found that dark reduction of photooxidized primary electron donor P870+ in reaction centres from purple anoxygenic bacteria (two non-sulphur Fe-oxidizing Rhodovulum iodosum and Rhodovulum robiginosum, Rhodobacter sphaeroides R-26 and sulphur alkaliphilic Thiorhodospira sibirica) is accelerated upon the addition of Mn2+ jointly with bicarbonate (30-75 mM). The effect is not observed if Mn2...