selective transformation of 2-propargylthio-6-methyl-pyrimidin-4(1h)on e (2) to 3,5-dimethyl-7h-thiazolo [3,2-a] pyrimidin-7-one (3) is performed under the conditionof base catalysis . for elucidation of structure, palladium catalyzed cyclization reaction of (2) was carried out and the structures of the products were assigned (5) and (6). these compounds underwent isomerization to (3) and (4) r...

the radioisotope 67ga (t 1/2 = 78 h) in extensively used as single photon marker for detecting the presence of malignancy and the diagnosis of inflammatory diseases. the high tumor specificity of carrier-free 67ga make it one of the most interesting radionuclides in nuclear medicine for in vivo scanning studies.67ga is a cyclotron produced radioisotopes and is one of the radiopharmaceuticals wh...

We perform a NLO QCD analysis of deep-inelastic scattering data, in which we account for absorptive corrections. These corrections are determined from a simultaneous analysis of diffractive deep-inelastic data. The absorptive effects are found to enhance the size of the gluon distribution at small x, such that a negative input gluon distribution at Q 2 = 1 GeV 2 is no longer required. We discus...

background and objectives: human t-cell lymphotropic viruses (htlv) type 1 and 2 are retroviruses that share the same routes of transmission as human immunodeficiency virus (hiv). as a consequence of epidemiologic similarities, hiv and htlv-1/2 co-infection is frequent. due to the limited data, this study assessed the seroprevalence of htlv-1/2 infections in hiv infected patients in tehran, ira...

Abstract C 13 H 7 BrN 2 O 3 , triclinic, P 1 ‾ $\overline{1}$ (no. 2), a = 7.2968(6) Å, b 7.6743(6) c 11.5698(12) α 77.255(8)°, β 73.573(8)°, γ 73.509(7)°, V 588.90(10) Å Z 2, R gt ( F ) 0.0459, wR ref 0.1089, T 220 K.