Siirt ili Kurtalan ilçesi civarında yüzeyleyen Miyosen yaşlı karbonatlı çökeller bölgenin jeolojik olarak değerlendirilmesinde oldukça önem taşır. Bu çalışma, Kayabağlar Formasyonu içerisinde merceksel yer alan ve Eskigarzan Kireçtaşı Üyesi ayrıtlanan birimin paleontolojik sedimantolojik veriler ışığında değerlendirilmesine dayanır. Dört ayrı lokaliteden alınan seri örnekler ile Üyesi’nde: Prae...

To know the conditions of contamination by the chemicals in the experimental animal diets, the contents of nitrosodimethylamine (NDMA) were analyzed in the diets for mice and rats. The raw materials of the diets were also analyzed. In addition, NDMA levels were determined in the diets which were stored long or heated in the autoclaves. The averages of NDMA in these diets were less than 10 ppb. ...

N-Nitrosodimethylamine (NDMA) is a member of a family of extremely potent carcinogens, the N-nitrosamines. Until recently, concerns about NDMA mainly focused on the presence of NDMA in food, consumer products, and polluted air. However, current concern focuses on NDMA as a drinking water contaminant resulting from reactions occurring during chlorination or via direct industrial contamination. B...

Abstract The genus Operculina , a large symbiont-bearing benthic foraminifer, is characterized by high morphological variability showing thick involute to intermediate semi-involute flat evolute tests. Different morphotypes are either considered as ecophenotypes or distinct species. In order test the hypothesis of versus different species, single cell throughput sequencing approach was applied ...

A novel HPLC method with fluorimetric detection was developed for the determination of potentially carcinogenic N-nitrosodimethylamine (NDMA) and N-nitrosodiethylamine (NDEA) in active pharmaceutical ingredient enalapril maleate. N-nitrosamines were subject to denitrosation followed by derivatisation dansyl chloride or fluorenylmethoxycarbonyl (Fmoc-Cl). Fmoc-Cl offers much better sensitivity r...