background: cobalamin deficiency and peripheral neuropathy (pn) are commonly seen in hiv-infected adults. the level of urine methylmalonic acid (umma), a reliable indicator of tissue cobalamin status, was determined in hiv infected subjects with and without pn to establish this association. methods: one hundred and ninety-eight (198) consenting hiv infected subjects with and without pn were rec...

The controlled release of well-defined radical species under mild conditions for subsequent use in selective reactions is an important and challenging task synthetic chemistry. We show here that simple bismuth amide [Bi(NAr2)3] readily aminyl radicals [NAr2]. at ambient temperature solution. These yield the corresponding hydrazines, Ar2N?NAr2, as a result highly N?N coupling. exploitation facil...

studying crustal and upper mantel structures has been limited in the iranian plateau and there has been little work done in this field. in this paper we have a primary motive to map pn and sn velocities beneath most of the iranian plateau in order to test 3-d mantle models and to develop and test a method to produce pn and sn travel time correction surfaces that are the 3-d analogue of travel t...

Four new complexes of the type [LCo ((DO)(DOH) pn) Cl] PF , where (DO) (DOH) pn = N , N '- propanediylbis (2, 3-butanedione2-imine3-oxirne)a nd L =morpholine (mrpln) (I), benzylamine (bzlan) (II), piperidine (pprdn)(III) and pyrrolidine (prldn) (IV) have been synthesized and characterized by elemental analyses and spectroscopic methods. Approximate values of the angular-overlap parameter, ?, ...

A vertex irregular total k-labeling of a graph G with vertex set V and edge set E is an assignment of positive integer labels {1, 2, ..., k} to both vertices and edges so that the weights calculated at vertices are distinct. The total vertex irregularity strength of G, denoted by tvs(G)is the minimum value of the largest label k over all such irregular assignment. In this paper, we study the to...