The development of new ROMP-derived silica-immobilized heterocyclic phosphate reagents and their application in purification-free protocols is reported. Grafting of norbornenyl norbornenyl-functionalized (Nb-tagged) silica particles with functionalized Nb-tagged heterocyclic phosphate monomers efficiently yield high-load, hybrid silica-immobilized oligomeric heterobenzyl phosphates (Si-OHBP) an...

379 Biominerals are the inorganic phases of minerals found in biological systems, which are distributed from microorganisms to the highest animals and plants (Mann et al. 1989, Simkiss and Wilbur 1989, Weiner and Lowenstam 1989, Mann 2001). Although minerals composed of calcium predominate, biominerals of barium, strontium, iron, and silica are also well known. Biominerals generally occur as ox...

background: the exact pathophysiology of testicular degeneration, following varicocele has not been completely understood yet.   objective: the current study was designed to determine the effect of varicocele on germinal epithelium (ge) cytoplasmic biohistochmical alterations.   materials and methods: to follow-up this study, left varicocele was induced in test groups. non-varicocelized rats we...

Objective: Activation of cholinergic muscarinic receptors leads to activation of membrane bound phospholipase C, leading to generation of IP3 and diacylglycérol, The present study aimed at measuring muscarinic receptor-mediated phosphoinositide breakdown in three different regions of rat brain. Methods: Cortical, hippocampal and striatal slices labeled with [3H] myo-inositol were incubated with...

Due to the similar chemical properties to the inorganic component in calcified tissues, synthetic calcium phosphate has been considered as ideal biomaterials with excellent biocompatibility. Nanostructured calcium phosphate materials play an important role in the formation of hard tissues in nature. It is reported that calcium phosphates materials in nano-size can mimic the dimensions of consti...

A helicopter crashed in January 2003 on the 5 m-thick perennial ice cover of Lake Fryxell, spilling synthetic turbine oil Aeroshell 500. Molecular compositions of the oils were analyzed by gas chromatography-mass spectrometry and compared to the composition of contaminants in ice, meltwater, and sediments collected a year after the accident. Aeroshell 500 is based on C20-C33 Pentaerythritol tri...

From the Departments of Neuroscience & Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, the Department of Membrane Biophysics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany, the Center for Basic Neuroscience, Department of Molecular Genetics, and Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Te...

Fewer phosphates but fatter axons xons are fattened by an unexpected neurofilament (NF) subunit, according to Garcia et al. (page 1011) and Rao et al. (page 1021), who find that more phosphorylation sites are not necessarily better when it comes to driving axon expansion. The radial growth-inducing subunit is one of three that make up NFs. The COOH-terminal tails of two of these subunits, NF-H ...

After the addition of a CD3 monoclonal antibody to peripheral T cells that have been previously stimulated with phytohemagglutinin, inositol phosphates are produced at a rapid rate for 2 min and at a much slower rate thereafter. Stimulation of CD5 allows CD3-mediated production of inositol phosphates to be sustained at a brisk rate for greater than 20 min and augments the initial CD3-mediated i...