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Anthropogenic Sulfate And Asian Dust Signals In Snow From Tien Shan, Northwest China, Cameron P. Wake, Paul Andrew Mayewski, Wang Ping, Yang Qinzhao, Han Jiankang, Xie Zichu
Anthropogenic Sulfate And Asian Dust Signals In Snow From Tien Shan, Northwest China, Cameron P. Wake, Paul Andrew Mayewski, Wang Ping, Yang Qinzhao, Han Jiankang, Xie Zichu
Earth Science Faculty Scholarship
Snow samples were collected from a 0.5 m snowpack at Glacier No. 1 and near Bogda Feng, eastern Tien Shan, northwest China. Samples that were melted in the field were analyzed for chloride, nitrate, sulfate, sodium, potassium, magnesium, calcium, and microparticles. Eight samples were returned frozen and were analyzed for the above ions plus ammonium, acetate, formate, methylsulfonate, and hydrogen peroxide. There was no significant difference in measured major ion concentrations between the melted and frozen samples. Measured cations in both sets of samples were two to three times greater than measured anions. Calcium and sodium are the dominant cations …
Identification Of The Subspecies Of Oreochromis Niloticus (Pisces: Cichlidae) Using Restriction Endonuclease Analysis Of Mitochondrial Dna, Seifu Seyoum, Irv Kornfield
Identification Of The Subspecies Of Oreochromis Niloticus (Pisces: Cichlidae) Using Restriction Endonuclease Analysis Of Mitochondrial Dna, Seifu Seyoum, Irv Kornfield
Marine Sciences Faculty Scholarship
Restriction endonuclease analysis of mitochondrial DNA (mtDNA) was used to characterize differentiation among the seven described subspecies of Oreochromis niloticus from East Africa and Egypt. Mitochondrial DNAs of 14 populations were examined with 42 restriction endonucleases. Two subspecies of Oreochromis spilurus were also examined. Approximately 8% of the mitochondrial genome of O. niloticus (17 070 ± 40 base pairs) was assayed; 29 (70%) of the 42 restriction enzymes that were examined displayed restriction phenotypes that varied among the samples analyzed. Several endonucleases produced restriction phenotypes which were diagnostic for the described subspecies of O. niloticus, though a few samples did …