Introduction: Porphyrins are interesting derivatives with low toxicity, tumor avidity and rapid wash-out suggested as potential radiopharmaceuticals in radiolabeled form. In this work we report, synthesis, radiolabeling, quality control, stability, partition coefficient determination and biodistribution studies of 153Sm-5,10,15,20-tetrakis(4-methoxyphenyl) porphyrin (153Sm-4-MPP) in ...

A new type of gauge extension of the SM is proposed. It is based on a SU (2) × SU (2) × U (1) group with the peculiarity that the gauge bosons of the extra SU (2) do not couple to fermions. This feature relaxes some of the constraints on the masses of the new gauge bosons, leaving the possibility of having lighter masses than in traditional extensions. The model exhibits several interesting pro...

Studies of conformational changes of tRNA de­ pending on the ionic strength of the solution and the nature of the counter ions have become a subject of interest because of the probable role of its different conformational states for the functioning of the tRNA molecule in protein biosynthesis [1]. Results in this field obtained recently e.g. by pulsed nano­ second fluorometry [2] and laser ligh...

This paper investigates whether peer effects play an important role in retirement savings decisions. We use individual data from the staff of a university to study whether individual decisions to enroll in a Tax Deferred Account plan sponsored by the university (and the choice of the mutual fund vendor for people who choose to enroll) are affected by the decisions of other employees in the same...

the synthesis of smcl3(thf)3 from smcl3.6h2o is described. the reaction of smcl3(thf)3 with nabh4 in dry thf gave white microcrystalline tris (tetrahydroborato) tris (tetrahydrofuran) samarium (iii), sm(bh4)3(thf)3. the vibrational and magnetic properties of sm(bh4)3(thf)3 have been studied.

1. Classes and Numbers of Secondary Metabolites (SM) 2. Occurrence and Properties of Major Groups of SM 3. Physiology of Secondary Metabolism: Biosynthesis, Transport and Storage of SM 4. Ecological Roles of SM 5. Molecular Modes of Action of SM 6. Chemosystematics of Plants and Distribution Patterns of SM 7. Origins and Evolution of Plant Secondary Metabolism 8. Conclusions Glossary Bibliograp...

Sphingomyelin (SM) synthase has been assumed to be involved in both cell death and survival by regulating pro-apoptotic mediator ceramide and pro-survival mediator diacylglycerol. However, its precise functions are ambiguous due to the lack of molecular cloning of SM synthase gene(s). We isolated WR19L/Fas-SM(-) mouse lymphoid cells, which show a defect of SM at the plasma membrane due to the l...

a r t i c l e i n f o Keywords: 146 Sm– 142 Nd systematics eucrites early planetary differentiation isotope distribution through solar system Short-lived 146 Sm– 142 Nd and long-lived 147 Sm– 143 Nd chronometers have been measured in three cumulate eucrites (Binda, Moore County and Moama). The two major mineral phases (plagioclase and pyroxene) present in these achondrites are characterized by ...