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Articles 1 - 30 of 90
Full-Text Articles in Life Sciences
The Effect Of Some Nutrients Supplementation To Synthetic Compostwith Wheat Straw Before Mycel Inoculation, On Mycelium Growth, Yieldand Early Ripe Of Agaricus Bitorquis(Quél). Sacc, Hasan Hüseyi̇n Doğan, Celaleddi̇n Öztürk, Cengi̇z Akköz
The Effect Of Some Nutrients Supplementation To Synthetic Compostwith Wheat Straw Before Mycel Inoculation, On Mycelium Growth, Yieldand Early Ripe Of Agaricus Bitorquis(Quél). Sacc, Hasan Hüseyi̇n Doğan, Celaleddi̇n Öztürk, Cengi̇z Akköz
Turkish Journal of Biology
The effect of some nutrients added to synthetic compost with wheat straw, on mycelium growth, yield and early ripe of Agaricus bitorquis (Quél.) Sacc. were investigated. The compost was prepared by fermentation and chemical disinfection methods. Corn flour, wheat flour, hen grain, soybean meal and sunflower seed hulls were used as additional nutrients. The experiments were made at the temperatüre 20-22°C and 80-90% relative humidity in the yield rooms. The shortest mycelium growth period (average 14 days) were determined in containing 350 g/10 kg and 450 g/10 kg sunflower seed hulls. The maximum production were taken in the sacks of …
Freeliving Ciliates Of Pure And Soils Polluted Byconstituents Of Oil Lifting At Apsheron Peninsula, İlham Kh Alekperov
Freeliving Ciliates Of Pure And Soils Polluted Byconstituents Of Oil Lifting At Apsheron Peninsula, İlham Kh Alekperov
Turkish Journal of Biology
The data compiled during five-year-long investigation on the influence of drilling water and crude oil on specific composition, number and structure of the communities of free-living soil ciliates is presented. The vertical distribution of ciliates and their colonizing potential in the sterile soil monoliths placed in clean and polluted soils was studied on the basis of their survival and physiological responses. The changes in certain ciliate species were demonstrated by biotesting of the influence of various concentrations of drillinig water, crude oil and drillinig muds on these ciliates.
The Effect Of Calcium Concentration Of Water Onchloride Cell Density In Gill Of Brown Trout(Salmo Trutta L.) Larvae, Meti̇n Çalta
The Effect Of Calcium Concentration Of Water Onchloride Cell Density In Gill Of Brown Trout(Salmo Trutta L.) Larvae, Meti̇n Çalta
Turkish Journal of Biology
The effects of the calcium concentration on chloride cell (mitochondria-rich cell) density in the gills of brown trout ( Salmo trutta L.) larvae were studied. For this purpose, animals were divided into 3 groups 2 weeks after hatching and each groups was exposed to different calcium concentrations of water for two weeks. The results showed that the number of chloride cells in gill arch epithelia of larval fish increased with decreased calcium concentration.This increase was statistically significant in the gills of larvae kept in zero-Ca 2+ freshwater (ZCWF) ( P< 0.001 ) and of those kept in low-Ca 2+ freshwater (LCFW) ( P< 0.05) in comparision with the gills of larvae kept in normal freshwater (NFW).
Study Of Interphases Betweensubunits Of Human Serum Albumin By Tritiumlabelling Method, Elimchan S. Dzhafarov
Study Of Interphases Betweensubunits Of Human Serum Albumin By Tritiumlabelling Method, Elimchan S. Dzhafarov
Turkish Journal of Biology
For the purpose of obtaining information about interphases between subunits of human serum albumin (HSA), a new tritium labelling method was adopted. The existence of linear dependence between accessible surface of amino acid residues and their specific radio-activity enabled to obtain information about qualitattive and quantitative amino acid composition of surface layer of protein globule and its large fragments. It is shown that the fragments surface characterized by higher accessibility of hydrophobic amino acid residues such as Ala, Val, Leu, Ile, Pro and Phe. Moreover Lys, Asx and Glx demonstrate high accessibility also. It is supposed that the spatial HSA …
The Effect Of Olive Oil Mill Effluent On The Mitotic Cell Division And Total Protein Amount Of The Root Tips Of Triticum Aestivuml., Mehmet Aybeke, Göksel Olgun, Uğur Sidal, Dürdane Kolankaya
The Effect Of Olive Oil Mill Effluent On The Mitotic Cell Division And Total Protein Amount Of The Root Tips Of Triticum Aestivuml., Mehmet Aybeke, Göksel Olgun, Uğur Sidal, Dürdane Kolankaya
Turkish Journal of Biology
In this work sitotoxic and mutagenic effects Olive Oil Mill Effluent (OOME) on the root tips of Triticum aestivumL. were investigated. In this purpose, germination rate of seeds, mitotic division abnormalities and total protein amounts were evaluated. The seeds kept in various OOME concentrastions, it was determinated that germination rate decreased, whilst mitotic abnormalities and mitotic cell division frequency increased. Especially, the increased cell division frequency was of significance, almost several times higher than the control group. The cells having multinucleus or fragmented nucleus and numerical or sutructural mutations were also found. Furthermore it was observed that total protein amounts …
The Use Of Random Amplified Polymorphic Dna(Rapd) Markers In Sex Discrimination In Niletilapia, Oreochromis Niloticus (Pisces: Cichlidae), Fevzi̇ Bardakci
The Use Of Random Amplified Polymorphic Dna(Rapd) Markers In Sex Discrimination In Niletilapia, Oreochromis Niloticus (Pisces: Cichlidae), Fevzi̇ Bardakci
Turkish Journal of Biology
Random amplified polymorphic DNA (RAPD) markers were successfully used in discrimination of sexes in Nile tilapia fish ( Oreochromis niloticus) using linear discriminant function analysis. The results provide support for the view that major genetical sex determining factors exist in tilapia.
Erythrocyte Superoxide Dismutase And Catalase Activities In Agricultureworkers Who Have Been Chronically Exposed To Pesticides, Ülkü Çömelekoğlu, Bi̇rgül Mazmanci, Abdullah Arpaci
Erythrocyte Superoxide Dismutase And Catalase Activities In Agricultureworkers Who Have Been Chronically Exposed To Pesticides, Ülkü Çömelekoğlu, Bi̇rgül Mazmanci, Abdullah Arpaci
Turkish Journal of Biology
Blood samples were taken from farmworkers (n=40) who had been long-term exposed with pesticides (16.52±6.92 years) in Içel and surrounding agricultural areas and measured erythrocyte superoxide dismutase (SOD) and catalase (CAT) activities were measured using spectrophotometric assignation. These antioxidant enzymes were also evaulated in people who had not been exposed to pesticides (n=30). It was observed that erythrocyte SOD levels were significantly higher (p
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 …
Availibility Of Use Of Total Extracellular Proteins Insds-Page For Characterization Of Gram-Positive Cocci, Sefa Can Saçilik, Özlem Osmanağaoğlu, Ufuk Gündüz, Cumhur Çökmüş
Availibility Of Use Of Total Extracellular Proteins Insds-Page For Characterization Of Gram-Positive Cocci, Sefa Can Saçilik, Özlem Osmanağaoğlu, Ufuk Gündüz, Cumhur Çökmüş
Turkish Journal of Biology
There are no reports in the literature dealing with gram-positive cocci typing by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) of extracellular proteins. In this study, Staphylococcus aureus, Staphylococcus warneri, Staphylococcus chromogenes, Micrococcus lysodeikticus and Micrococcus ssp. of the Micrococcaceae family, and Pediococcus halophilus, Streptococcus ssp. and Enterococcus faecalis of the Streptococcaceae family were characterized by SDS-PAGE of whole cell proteins (WCPs) and total extracellular proteins (TEPs). Comparison of SDS-PAGE of WCP profiles with banding patterns produced by that of TEPs provided additional criteria and characteristic banding patterns for the study of the characterization of gram-positive cocci. This method was found …
A Quantitative And Qualitative Study On The Benthic Algal Floraof Palandöken Pond, Hasan Gürbüz
A Quantitative And Qualitative Study On The Benthic Algal Floraof Palandöken Pond, Hasan Gürbüz
Turkish Journal of Biology
In this study, the composition and density of the benthic algae and seasonal variations of the benthic algae of Palandöken Pond were determined between September 1990 and September 1992. Samples were collected from two previously selected sampling sites. It was found that Bacillariophyta was the dominant benthic algal group in this pond. During our investigation a total of 160 taxa were identified and 135 them were composed of epipelic algae. The percentages of algal groups were as follows: Bacillariophyta 57%, Cholorphyta 11% and Euglenophyta5%. It was found that there were plenty of epipelic algal species living together with epiphytic and …
The Monthly Variations Of Blood Glucose Level Of Capoeta Tinca Capoeta(Heckel, 1843) In Çoruh Basin-Oltu Stream, Ayhan Yildirim, Mustafa Türkmen, İrfan Altuntaş
The Monthly Variations Of Blood Glucose Level Of Capoeta Tinca Capoeta(Heckel, 1843) In Çoruh Basin-Oltu Stream, Ayhan Yildirim, Mustafa Türkmen, İrfan Altuntaş
Turkish Journal of Biology
In this study, the monthly variation of blood glucose level of Capoeta tinca caught from in Çoruh Basin - Oltu Stream, between Augist 1995 and June 1996 was determined. It was determined that the average blood glucose level was 86.19±3.86 mg/dl in males and 83.58±3.77 mg/dl in females. The blood glucose level was highest (116.36±8.58 mg/dl) in April, and lowest (51.00±7.10 mg/dl) in June.
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
Effects Of Exogenous Spermine On Seed Germination And Early Growthof Sunflower Seeds Under Salinity Stress, Fatma Mutlu, Suna Boncuk
Effects Of Exogenous Spermine On Seed Germination And Early Growthof Sunflower Seeds Under Salinity Stress, Fatma Mutlu, Suna Boncuk
Turkish Journal of Biology
The effects of various concentrations (0.01, 1, 2mM) of spermine (Spm) on germination and some early growth parameters of sunflower ( Helianthus annuus L. cv. Santafe) seeds were investigated in media containing different concentrations of NaCl (50, 100, 200mM). Regardless of its concentrations, application of Spm under non-saline conditions remained ineffective on germination percentage as well as on the early growth parameters studied (length of radicle, fresh and dry weights). The salt, depending on its concentration, inhibited or delayed the germination to a great extent. The growth parameters studied in the early growth period were also adversely affected by salt …
The Effects Of Heavy Metals On The Pollen Germination And Pollen Tubegrowth Of Apples (Malus Sylvestris Miller Cv. Golden), Ömer Munzuroğlu, Nazmi̇ Gür
The Effects Of Heavy Metals On The Pollen Germination And Pollen Tubegrowth Of Apples (Malus Sylvestris Miller Cv. Golden), Ömer Munzuroğlu, Nazmi̇ Gür
Turkish Journal of Biology
The effect of heavy metals, namely mercury (Hg^{+2}), zinc (Zn^{+2}), nickel (Ni^{+2}) and cobalt (Co^{+2}), which were applied in the form of chloride salt, and that of lead (Pb^{+2}) and cadmium (Cd^{+2}) applied in the form of nitrate salt, on the pollen germination and tube growth were investigated on apples ( Malus sylvestris cv. Golden). According to the results obtained, these heavy metals led to a significant decrease in the pollen germination and tube growth. It was found that there was a parallelism between the concentration of heavy metal salt, and pollen germination and tube growth. Among the heavy metals …
Production Of Monoclonal Antibodies Specific Forprogesterone, Estradiole By Simultaneous Injectionof Different Steroids, Fatma Şahi̇ngöz Yücel, Beyazit Çirakoğlu
Production Of Monoclonal Antibodies Specific Forprogesterone, Estradiole By Simultaneous Injectionof Different Steroids, Fatma Şahi̇ngöz Yücel, Beyazit Çirakoğlu
Turkish Journal of Biology
We report here the development of hybrid cells producing monoclonal antibodies specific for two different steroid hormones with mixed immunization using hybridoma technology. BALB/c mice were immunized with a mixture of three steroid antigens: progesterone, estradiole and testosterone linked to bovine serum albumine. These mice were used for fusion. In the two fusion experiments, ELISA tests showed that among 645 wells only 2 hybrids reacted with progesterone (MAM 3C2, MAM 3E3) and one of them reacted specifically with estradiol (MAM 7H7). Three types of monoclonal antibodies were detected: IgG1, IgG2a and IgG2b and the affinities of these antibodies were found …
Characterization Of \Beta-Xylosidase And\Alpha-L-Arabinofuranosidase Activities Fromthermomonospora Fusca Bd25, Müni̇r Tuncer
Characterization Of \Beta-Xylosidase And\Alpha-L-Arabinofuranosidase Activities Fromthermomonospora Fusca Bd25, Müni̇r Tuncer
Turkish Journal of Biology
Thermomonospora fuscaBD25 produces relatively high levels of activity of \beta-xylosidase and \alpha-L-arabinofuranosidase. The aim of the work described in this study was to characterize some properties of \beta-xylosidase and \alpha-L-arabinofuranosidase produced by T. fusca BD25 when growing on oat spelt xylan as the main carbon and energy sources. The substrates p-NPX and p-NPA reacted with \beta-xylosidase and \alpha-L-arabinofuranosidase with specific activities of 4.01 U mg -1 protein and 0.35 U mg -1 protein, respectively. The \beta-xylosidase remained stable at up to 65 °C, but \alpha-L-arabinofuranosidase lost 10 % of its maximum activity at 55 °C. \beta-xylosidase and \alpha-L-arabinofuranosidase activities remained …
The Possibility Of Using Crustacean Waste Products(Cwp) On Rainbow Trout ( Oncorhynchus Mykiss)Feeding, Yeşi̇m Özoğul
The Possibility Of Using Crustacean Waste Products(Cwp) On Rainbow Trout ( Oncorhynchus Mykiss)Feeding, Yeşi̇m Özoğul
Turkish Journal of Biology
Crustacean waste product (CWP) generated from the fishing industry could be used in diets for rainbow trout as an alternative animal protein. Some experiments have been undertaken with penaid species, showing that it is possible to partially replace fish meal with CWP in penaid feeds. This study has been designed to assess whether CWP could be used to partially replace fish meal in diets for rainbow trout. The results show that CWP improved the digestibility of the diet, yielding the highest performance, and also that the addition of large amounts of CWP to a low-protein diet did not depress appetite. …
Determination Of Organophosphate Resistance-Dependent Over-Produce Esterase Allel Type With Electrophoresis In The Malaria Vector Species Anopheles Sacharovi And Culex Pipiens (Diptera: Culicidae), Ümi̇t Lüleyap, Davut Alpteki̇n, Hali̇l Kasap, Mülki̇ye Kasap
Determination Of Organophosphate Resistance-Dependent Over-Produce Esterase Allel Type With Electrophoresis In The Malaria Vector Species Anopheles Sacharovi And Culex Pipiens (Diptera: Culicidae), Ümi̇t Lüleyap, Davut Alpteki̇n, Hali̇l Kasap, Mülki̇ye Kasap
Turkish Journal of Biology
In this study, over-produce esterase allele types dependent on organophosphate resistance in mosquitoes were determined by cellulose acetate gel electrophoresis in the human malaria vector species Anopheles sacharovi and Culex pipiens in Çukurova (Adana). We found A_2 and A_5 allele bands with some unknown and unidentified gel bands in some An. sacharovi field samples, of which some bands seemed to match with over-produce esterase. We identified A_2-B_2 allele types for all the Cx. pipiens samples collected in this study.
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 …
The Inhibition Effect Of Yoghurt Starter Culture Metabolites, Belma Aslim, Yavuz Beyatli, Kadi̇r Halkman
The Inhibition Effect Of Yoghurt Starter Culture Metabolites, Belma Aslim, Yavuz Beyatli, Kadi̇r Halkman
Turkish Journal of Biology
In this study effect of some separate and combined metabolic compounds produced by lactic acid were tested on food pathogenic and contaminant microorgnasms. For this study, five strains of each Lactobacillus bulgaricus and Streptococcus thermophilus were used. The inhibition effects of the metabolic products (lactic acid, hydrogen peroxide, acetaldehyde, diacetyl) produced by the stains on test bacteria ( Staphylococcus aureus, Escherichia coli) were determined. Also, a random combinations of the strains were prepared and the metabolic compounds produced by these cultures and their antimicrobial activities on tested bacteria were determined. By regarding the metabolic products mainly, the samples of lactic …
Hepatitis C Virus: Genome Organization, Viralproteins And Implications In Disease Pathogenesis, Çağla Eroğlu, Ergün Pinarbaşi
Hepatitis C Virus: Genome Organization, Viralproteins And Implications In Disease Pathogenesis, Çağla Eroğlu, Ergün Pinarbaşi
Turkish Journal of Biology
The hepatitis C virus (HCV) infection is a significant cause of morbidity and mortality worldwide. Infection with HCV becomes chronic in more than 80% of cases and it accounts for 20% of all cases of acute hepatitis. The hepatitis C virus was first identified by the molecular cloning of the virus genome in 1989. It is an enveloped, positive strand RNA virus with a genome size of around 9.5 kilobases. The single-stranded RNA genome of the virus contains a large open reading frame that encodes a large polyprotein of 3,010 to 3,033 amino acids shown to be processed by a …
Phage Sensitivities Of Lactococci Isolated From Raw Milk And Whey, Pinar Şanlibaba, Mustafa Akçeli̇k
Phage Sensitivities Of Lactococci Isolated From Raw Milk And Whey, Pinar Şanlibaba, Mustafa Akçeli̇k
Turkish Journal of Biology
In this study, lactococcal strains isolated from raw milk and whey samples of different types of cheese produced without using industrial starter cultures in different regions of Turkey were tested for sensitivity to 22 lactic phages. In addition to the strain isolation materials, virulent lactic phages were also isolated from samples obtained from dairy plants using industrial starter cultures. 18 L lactis subsp. lactis strains out of 73 lactococcal strains were found to be resistant to all the phages. It was determined that the total phage resistance levels of the other 55 strains were between 18.18 and 90.90%.
Study Of Adventitious Shoot Formation In Leaves Of Grape (Vitis Spp.), Ni̇lgün Göktürk Baydar
Study Of Adventitious Shoot Formation In Leaves Of Grape (Vitis Spp.), Ni̇lgün Göktürk Baydar
Turkish Journal of Biology
The effects of genotype, source of explant and nutrient medium on adventitious shoot formation were examined in the leaves of 5 grape cultivars (Atasarisi, Çavus, Kalecik Karasi, Sultani çekirdeksiz and Yapincak), 2 rootstocks (Kober 5BB ( V. berlandieri x V. riparia) and 41 B M.G. (Chasselas x V. berlandieri)) by organogenesis. In this study, petioles and laminae isolated from in vitro shoots were used as the sources of explant. The highest rates of adventitious shoot formation were obtained from petiole explants. Leaf explants were cultured on MS- and NN- based regeneration media containing different concentrations of BAP and NAA. It …
Physiological Changes In Grapevines Induced By Osmotic Stress Originated From Salt And Their Role In Salt Resistance, Nuray Si̇vri̇tepe
Physiological Changes In Grapevines Induced By Osmotic Stress Originated From Salt And Their Role In Salt Resistance, Nuray Si̇vri̇tepe
Turkish Journal of Biology
Rooted cuttings of Çavuş (salt-resistant), Müşküle (salt-sensitive) and Sultani Çekirdeksiz (moderately salt-sensitive) grapevine cultivars, grown in perlite medium, were subjected to salt stress by irrigating them with 1/2 Hoagland nutrient solution including different NaCl concentrations (0.00, 0.50 and 0.75%). It was determined that stomatal conductance and transpiration were strongly inhibited in Müşküle and Sultani Çekirdeksiz with salt treatments, while these physiological activities were maintained with a controlled decrease in cv. Çavuş. Relative water content of leaves decreased while loss of turgor increased in cv. Müşküle due to the salt treatments. Similar changes were also observed in cv. Sultani Çekirdeksiz although …
The Cytogenetic Effects Of Npyr On Mice, Mehmet Korkmaz, Ahmet Çolak
The Cytogenetic Effects Of Npyr On Mice, Mehmet Korkmaz, Ahmet Çolak
Turkish Journal of Biology
The effects of N-nitrosopyrrolidine (NPYR) on mice chromosomes and micronucleus induction were investigated in order to evaluate its genotoxic effects. Twenty 10-12 week old mice and 40 8- 10 week old male mice ( Mus musculus var. albinos) were used for chromosome analysis without sex discrimination and micronucleus tests respectively. Mice were intraperitoneally treated in single injections with three dose levels (100, 200 and 300 mg/kg) of NPYR with isotonic saline as the solvent vehicle. Bone marrow was sampled at 24 and 48 h postinjection. Examination of the mice bone marrow chromosomes at the metaphase (24 h) showed that in …
A Quantitative And Qualitative Study On The Phytoplankton Of Palandöken Pond, Hasan Gürbüz, Zekeri̇ya Altuner
A Quantitative And Qualitative Study On The Phytoplankton Of Palandöken Pond, Hasan Gürbüz, Zekeri̇ya Altuner
Turkish Journal of Biology
In this research, the phytoplankton community of Palandöken pond was investigated quantitatively and qualitatively in samples taken vertically from the surface to 10 m depth between October 1990 and October 1992. The physical and chemical properties of the pond water were also determined. 99 taxa were determined in the phytoplankton and the proportions of them were as follows: Bacillariophyta 79%, Chlorophyta 10%, Cynophyta 6%, Euglenophyta 5%. The phytoplankton generally increased in the spring and early fall whereas in the summer and late fall it decreased. Physical factors had the greatest effect on phytoplankton growth.
Detection Of Mutagenic Effects Of 2, 4, 5 Tri (Sübstitüe) Phenyl Imidazole And Its Derivatives In Ames/Salmonella/Test System, Ayşe Mercangöz, Berri̇n Ayaz Tüylü
Detection Of Mutagenic Effects Of 2, 4, 5 Tri (Sübstitüe) Phenyl Imidazole And Its Derivatives In Ames/Salmonella/Test System, Ayşe Mercangöz, Berri̇n Ayaz Tüylü
Turkish Journal of Biology
The mutagenic effects of 2, 4, 5 tri-phenylimidazole and its nine different derivatives, which are aimed at producing medicine as a primary substance, were investigated by the Ames Salmonella/Microsome plate assay. The test compounds were directly effective, especially in the TA 98 strain. A relationship was found between the mutagenic effect and the positions of the methyl and methoxy groups.
The Population Structure And Growth Properties Of Chalcalburnusmossulensis (Heckel, 1843) Caught From Askale Region Of River Karasu, Mustafa Türkmen, İhsan Akyurt
The Population Structure And Growth Properties Of Chalcalburnusmossulensis (Heckel, 1843) Caught From Askale Region Of River Karasu, Mustafa Türkmen, İhsan Akyurt
Turkish Journal of Biology
In this study, the population structure and growth properties of Chalcalburnus mossulensis (Heckel, 1843) caught from Askale Region of River Karasu betwen February 1996 and January 1997 were examined. The age composition of population varied between I and VI ages, and the most abundant age group was the third age group (42.13%). The population was composed of 51.74% females and 48.26% males. The fork length and the body weights of males and females varied between 8.9-18.1 cm, 3.6-67.9 g and 8.5-18.5 cm, 5.1-79.5 g respectively. The specific and relative growth for length and weight were maximum in the second age. …
The Effects Of Malt Extract And Corn Strach On The Vegetativedevelopment And Morphology Of The Pleurotus Floridafovose Mycelia, Abdunnasir Yildiz
The Effects Of Malt Extract And Corn Strach On The Vegetativedevelopment And Morphology Of The Pleurotus Floridafovose Mycelia, Abdunnasir Yildiz
Turkish Journal of Biology
No statistical differences were determined in the effects of malt extract (ME) and corn strach (CS) doses on the vegetative development of mycelia (P>0.05). The mycelia in all gropus covered 9.0 cm agar plates in 9.0 days and some characteristic differences, development from (vertical or horizontal), cluster formation, tickening and tissue formations, were observed. In the group containing 2% CS, the mycelia formed a sparse development horizontally on the surface and center of the agar plate, whereas clustering, thickening and tissue formation wereobserved in the form of a thick zone on the edges of the petri dishes. In 1.5% …
Morphological Changes In Xenopus Laevisembryoswith Lithium And Evaluation Of The Fetax Test, Ayper Boğa, Seçi̇l Bi̇nokay, Ayşe Kendi̇rci̇, Tuncay Özgünen, Emi̇ne Kizilkanat
Morphological Changes In Xenopus Laevisembryoswith Lithium And Evaluation Of The Fetax Test, Ayper Boğa, Seçi̇l Bi̇nokay, Ayşe Kendi̇rci̇, Tuncay Özgünen, Emi̇ne Kizilkanat
Turkish Journal of Biology
The main goal was to standardize the FETAX (Frog Embryos Teratogenesis Assay: Xenopus) test. Since lithium ions are known to be teratogenic for embryos of many organisms, they were prefferred for our first standardization assay. Xenopus laevis embryos were exposed to lithium chloride (from 2x10 -4 to 6 x 10 -3 M concentrations) for 96 hours at 2-4 cell stages of development. Exposure to lower LiCl concentrations permitted larvae to survive and to develop into normal ones. On the other hand, depending on the increase in the LiCl concentration, the body length and survival rate (%) decreased. In addition, the …