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Articles 661 - 672 of 672
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Investigation On The Liver Functions Agriculturel Workers Chronically Exposed To Pesticides, Ülkü Çömelekoğlu, Bi̇rgül Mazmanci, Abdullah Arpaci
Investigation On The Liver Functions Agriculturel Workers Chronically Exposed To Pesticides, Ülkü Çömelekoğlu, Bi̇rgül Mazmanci, Abdullah Arpaci
Turkish Journal of Biology
Blood samples were taken from agricultural workers who had been exposed to pesticides for long periods in Içel and the surrounding agricultural areas (n=150) and levels of AST, ALT, ALP, LDH, total protein, albumin and globulin in serum were determined. The same parameters were measured in 64 persons who are not exposed to pesticides in any way. Study group showed significantly higher levels of AST, ALT, ALP and LDH (p
Population Dynamics Of Horse Mackerel (Trachurus Trachurus L., 1758)Stocks In The Mid Black Sea, Turkey, Şennan Yücel, İbrahi̇m Erkoyuncu
Population Dynamics Of Horse Mackerel (Trachurus Trachurus L., 1758)Stocks In The Mid Black Sea, Turkey, Şennan Yücel, İbrahi̇m Erkoyuncu
Turkish Journal of Biology
The aim of the present study, which was carried out on 720 individuals between October 1995 and September 1996 in the mid Black Sea region was to estimate some parameters of the population of horse mackerel (Trachurus trachurus L. 1758) including age, size, weight, sex compositions, growth and mortality rates. Ages between 0 and 7 were established in horse mackerel stock. The weight-length relationship was calculated as; W= 0.00759L 3.05 , condition factor 0.843 and the Von-Bertalanffy growth formulas were, Lt= 16.92 (1- -0.3538 (t+2.7938) ) Wt= 47.11 (1-e -0.3538 (t+2.7938) ) 3.05 . Instantaneous total mortality coefficient, natural mortality …
The Effect Of Cadmium Nitrate On The Longevity Of Drosophilamelanogaster, Eli̇f Yeşi̇lada, Lütfi̇ye Gelegen
The Effect Of Cadmium Nitrate On The Longevity Of Drosophilamelanogaster, Eli̇f Yeşi̇lada, Lütfi̇ye Gelegen
Turkish Journal of Biology
The effect of cadmium nitrate on the longevity of Drosophila melanogaster was tested. When cadmium nitrate was given throughout the adult life it caused a decrease in the mean life-span of flies in all treated groups. Furthermore, the effect of cadmium nitrate on young populations was also compared with aged populations. The young populations survived longer than aged populations with the food medium containing cadmium nitrate.
Germin, An Oxalate Oxidase, Has A Function In Manyaspects Of Plant Life, Mahmut Çalişkan
Germin, An Oxalate Oxidase, Has A Function In Manyaspects Of Plant Life, Mahmut Çalişkan
Turkish Journal of Biology
Germin, a molecular marker of wheat embryo germination, is a remarkably protease-resistant, apoplastic, homopentameric glycoprotein. Different forms of germin found to be related to various aspects of plant development have been discovered. Germins were determined in cereals, dicotyledonous angiosperms, gymnosperms and in a prosit, all these proteins are together called germin-like proteins due to their DNA sequence homology. Cereal germins have oxalate oxidase activity, an activity which generates hydrogen peroxide by degrading oxalic acid. Both of these molecules have been implied in the regulation of cell development, differentiation, signalling and defence systems of plants. The germin-like proteins found in dicotyledonous …
Bacteriocin Typing Of Some Turkish Isolates Ofpseudomonas Syringae Pv. Phaseolicola, Kiymet Güven
Bacteriocin Typing Of Some Turkish Isolates Ofpseudomonas Syringae Pv. Phaseolicola, Kiymet Güven
Turkish Journal of Biology
Eighty-six Pseudomonas syringae pv. phaseolicola isolates collected from different bean growing areas in Eskişehir were typed for the production of bacteriocin.All the isolates tested produced bacteriocin and 24 bacteriosin groups were determined. No correlation was found between the bacteriocin groups and geographical origin. Authentic isolates of the bacterium representing 3 different races were also tested for bacteriocin production and bacteriocin types did not correlate with the races.
Nonspecific Esterase Patterns Of Rattus Norvegicus(Berkenhout, 1769) In Western Turkey, Reyhan Çolak, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Şaki̇r Özkurt
Nonspecific Esterase Patterns Of Rattus Norvegicus(Berkenhout, 1769) In Western Turkey, Reyhan Çolak, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Şaki̇r Özkurt
Turkish Journal of Biology
Nonspecific esterases in the muscle, heart, kidney and liver tissues of wild rats (Rattus norvegicus) were examined by horizontal starch gel electrophoresis. Zymogram bands corresponding to Es-10 and Es-4 in the muscle, heart, kidney and liver homogenates, Es-3 and Es-17 in the kidney and liver, Es-18 in the liver tissue, Es-15 in kidney and liver, Es-2 in the muscle and heart, Es-16 in the heart tissue were detected. These findings showed that nonspecific esterases are very polymorphic and tissue-specific, and are not of taxonomic importance for the populations of Rattus norvegicus.
Blood Serum Proteins Of The Genus Mesocricetusnehring, 1898 (Mammalia: Rodentia) In Turkey, Reyhan Çolak, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Şaki̇r Özkurt
Blood Serum Proteins Of The Genus Mesocricetusnehring, 1898 (Mammalia: Rodentia) In Turkey, Reyhan Çolak, Nuri̇ Yi̇ği̇t, Ercüment Çolak, Mustafa Sözen, Şaki̇r Özkurt
Turkish Journal of Biology
In this study, 18 live specimens collected from six localities in the distribution areas of Mesocricetus brandti and Mesocricetus auratus were examined using SDS-PAGE (sodium dodecyl sulphate-polyacrylamide gel electrophoresis). The findings showed that there is no difference in globulin and albumin proteins of M. brandti and M. auratus, and supported the claim that M. auratus is very closely related to M. brandti.
Isolation, Identification And Toxigenic Tests Of Aeromonas Hydrophila From Several Sources In Izmir, Ataç Uzel, Füsun Uçar
Isolation, Identification And Toxigenic Tests Of Aeromonas Hydrophila From Several Sources In Izmir, Ataç Uzel, Füsun Uçar
Turkish Journal of Biology
A total of 43 samples (4 sea water, 5 water, 4 river water, 10 oyster and 10 fish samples) from Izmir were examined for the presence of Aeromonas hydrophila. Alkaline peptone Water (APW) for the environmental samples and Trypticase Soy Broth with Ampicillin and Toluidine Blue (TSBA) for the food samples were used for enrichment of the samples. In isolation, 5 different selective media were used: DNase Agar with Toluidine blue and Ampicillin (DNTA), Aeromonas Agar (AA), Rimler Shotts Agar (RSA), mA Agar and Aeromonas Mediums Base (AMB). Identification of the isolates was performed according to Bergey's Manual of Determinative …
The Effect Of Sulphur Dioxide On Macrophage Phagocytic Activity In Diabetic Rats, Veci̇he Ni̇met İzgüt Uysal, Vural Küçükatay, Aysel Ağar, Pi̇raye Yargiçoğlu
The Effect Of Sulphur Dioxide On Macrophage Phagocytic Activity In Diabetic Rats, Veci̇he Ni̇met İzgüt Uysal, Vural Küçükatay, Aysel Ağar, Pi̇raye Yargiçoğlu
Turkish Journal of Biology
Sulphur dioxide as a criterion of air pollution supresses macrophage functions. Some immunological changes in diabetes mellitus have been detected. In the present study, we examined the effect of sulphur dioxide on macrophage phagocytic activity in diabetic rats. The animals were separated into four groups as: 1) Control, 2) Sulphur dioxide, 3) Diabetes mellitus, 4) Diabetes mellitus+sulphur dioxide. The first and the third groups of animals were respirated with filtered atmosphere air in a special chamber one hour daily for eight weeks, while the other groups were exposed to 10 ppm sulphur dioxide in the same conditions and periods. The …
Effects Of Endosulfan On The Isolated Sciatic Nerve Of The Frog, Ülkü Çömelekoğlu, Belgi̇n Büyükakilli, Aynur Avci Özge
Effects Of Endosulfan On The Isolated Sciatic Nerve Of The Frog, Ülkü Çömelekoğlu, Belgi̇n Büyükakilli, Aynur Avci Özge
Turkish Journal of Biology
The purpose of this study was to investigate the effect of endosulfan on the isolated sciatic nerve of the frog. The nerve was exposed to 0.5 ppm endosulfan for 60 min and then compound action potentials were recorded extracellulary. The latencies, amplitudes, durations of depolarization and repolarization and threshold voltage were measured (n=30). Conduction velocities were calculated using the nerve lengths and latency values of each nerve. It was observed that values of amplitude and duration of repolarization were significantly higher (p
Distribution Of The Bacteria Involved In The Nitrogen And Sulfur Cycle In İzmir Bay, Fatma Güngör, Füsun Uçar
Distribution Of The Bacteria Involved In The Nitrogen And Sulfur Cycle In İzmir Bay, Fatma Güngör, Füsun Uçar
Turkish Journal of Biology
Qualitative seasonal distributions of sulfate-reducing bacteria, colorless sulfur bacteria, nitrifying and denitrifying bacteria in the water and sediment samples in the inner part of İzmir Bay were investigated in relation to certain physico-chemical parameters (pH, oxygen, hydrogen sulfide, nitrate, nitrite, ammonium). Denitrifying bacteria and sulfate-reducing bacteria were present in the sediment and even in the aerobic water samples. Hydrogen sulfide was found almost in all water samples measured but it was at lower concentrations. It is suggested that denitrifying bacteria and sulfate reducing bacteria which produce hydrogen sulfide are involved in the mineralization of organic matter. Members of Thiobacillus and …
The Feeding Of Brachionus Plicatilis (Rotifera) With Different Microalgae Species, Isochrysis Galbana Parke, Tetraselmis Chuii (Bucker), Rhinomonas Reticulata (Lucas) Novamizo, Pavlova Lutheri (Droop) Green And Chlorella Vulgaris Beijerinck, Seli̇n Sayin, Oya Işik, Sevi̇m Polat
The Feeding Of Brachionus Plicatilis (Rotifera) With Different Microalgae Species, Isochrysis Galbana Parke, Tetraselmis Chuii (Bucker), Rhinomonas Reticulata (Lucas) Novamizo, Pavlova Lutheri (Droop) Green And Chlorella Vulgaris Beijerinck, Seli̇n Sayin, Oya Işik, Sevi̇m Polat
Turkish Journal of Biology
In this study, the feeding of Brachionus plicatilis with different single cell microalgae species, Tetraselmis chuii, Isochrysis galbana, Pavlova lutheri, Chlorella vulgaris and Rhinomonas reticulata which are used widely for rotifer culture was investigated. At the first stage of the study, B. plicatilis was fed a mixture of T. chuii, C. vulgaris, I. galbana and R. reticulata the densities of which were 130x104, 650x10^4, 260x10^4 and 130x10^4 cell/ml respectively. The highest ingestion rate, namely 1643 cell/rot./min, was obtained with C. vulgaris. At the second stage, B. plicatilis was fed a the mixture of T. chuii and R. reticulata, of which …