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Articles 1561 - 1590 of 1681
Full-Text Articles in Biology
Electrophoretic Analysis Of Candida Albicans Isolatescollected From Turkish Hospitals By Native-Polyacrylamidegel Electrophoresis (N-Page), Özlem Osmanağaoğlu, Sefa Can Saçilik, Ufuk Gündüz, Nurten Altinlar, Cumhur Çökmüş
Electrophoretic Analysis Of Candida Albicans Isolatescollected From Turkish Hospitals By Native-Polyacrylamidegel Electrophoresis (N-Page), Özlem Osmanağaoğlu, Sefa Can Saçilik, Ufuk Gündüz, Nurten Altinlar, Cumhur Çökmüş
Turkish Journal of Biology
Native-polyacrylamide gel electrophoresis (N-PAGE) was used to characterize Candida albicansstrains isolated from vaginal specimens of patients suffering from vaginitis in Ankara hospitals, Turkey. Three different protein band profiles were observed among these 38 C. albicansisolates when whole cell protein extracts of these strains were used in N-PAGE. 34 of the 38 isolates were shown to belong to a single group or clone with a dissemination percentage of 89, while three isolates belonged to another group with a percentage of 8. Furthermore only one C. albicans isolate was detected with a dissemination percentage of 3 and assigned to a third group. …
Protein Profiles And Prevalence Of Methicillinresistant Staphylococcus Aureus (Mrsa) In Gülhanemilitary Academy Hospital In Turkey, Sefa Can Saçilik, Özlem Osmanağaoğlu, Özgül Kisa, Ahmet Başustaoğlu, Cumhur Çökmüş
Protein Profiles And Prevalence Of Methicillinresistant Staphylococcus Aureus (Mrsa) In Gülhanemilitary Academy Hospital In Turkey, Sefa Can Saçilik, Özlem Osmanağaoğlu, Özgül Kisa, Ahmet Başustaoğlu, Cumhur Çökmüş
Turkish Journal of Biology
The present study was undertaken to determine the relationship between Methicillin-Resistant Staphylococcus aureus (MRSA) strains isolated from various clinical specimens in Gülhane Military Medical Academy, in Ankara, Turkey. In 1997, at this hospital, the percentage of S. aureus among all nosocomial isolates was 20% and the percentage of MRSA among these S. aureus isolates was 51%. Both sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and Native-Page (N-PAGE) were used for typing MRSA isolates which have common antibiotic susceptibility test results. MRSA isolates were also evaluated according to the whole-cell proteins (WCPs) and filtrate proteins (FPs). Using these methods, we concluded that …
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 …
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.
Antiviral Activity Of Some Plant Extracts On Thereplication Of Autographa Californicanuclearpolyhedrosis Virus, Ömer Ertürk, Zi̇hni̇ Demi̇rbağ, Ali̇ Osman Beldüz
Antiviral Activity Of Some Plant Extracts On Thereplication Of Autographa Californicanuclearpolyhedrosis Virus, Ömer Ertürk, Zi̇hni̇ Demi̇rbağ, Ali̇ Osman Beldüz
Turkish Journal of Biology
The effect of crude extracts, obtained from Aconitum nasutum, Daphne glomerata, Hypericum androsaemum, Laurus nobilis, Nerium oleander, Olea europaea, Prunus laurocerasus, Punica granatum, Rhododendron caucasicum, and Urtica dioica on the replication of Autographa californica nuclear polyhedrosis virus (AcNPV) grown in Spodoptera frugiperda cell culture were investigated by observing changes in cytophatic effects, progeny virus concentration and viral protein (polyhedrin) synthesis. We determined an inhibitory effect on cytophatic changes, virus concentration and synthesis of polyhedrin by utilizing the extract of A conitum nasutum, Hypericum androsaemum, Laurus nobilis, Rhododendron caucasicum, and Urtica dioica plants. On the other hand, the effects of Daphne …
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. …
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.
Humerus Primer Ossification Zone Development In Rat Fetuses: A Histological And Histochemical Study, İsmai̇l Üstünel, Gökhan Akkoyunlu, Erdoğan Kocamaz, Ramazan Demi̇r
Humerus Primer Ossification Zone Development In Rat Fetuses: A Histological And Histochemical Study, İsmai̇l Üstünel, Gökhan Akkoyunlu, Erdoğan Kocamaz, Ramazan Demi̇r
Turkish Journal of Biology
In this investigation of the primary ossification zones of 14-18 day-old fetal rat humeri by histological, histochemical and histoenzymatical methods, 30 rat fetuses of the species Rattus norvegicus were used. The humeral diaphysis samples of the fetuses were subjected to alcian blue-heamatoxylin, periodic acid Schiff (PAS)-heamatoxylin, alcian blue-PAS-heamatoxylin, alizarin red and toluidine blue, alkaline phosphatase (ALP), adenosine triphosphatase (ATPase) and acid phophatase (ACP) staining techniques. The results can be summarized as follows: On day 14, no ossification signs were evident yet, whereas on day 15, the initiation of degenerations in some chondrocyte cytoplasms and the formation of osteoblastic cells on …
Production Of Uricase Enzyme From Aspergillus Niger And Determination Of Some Factors Affecting The Activity, Fi̇gen Ertan, Erol Aksöz
Production Of Uricase Enzyme From Aspergillus Niger And Determination Of Some Factors Affecting The Activity, Fi̇gen Ertan, Erol Aksöz
Turkish Journal of Biology
This study was undertaken to obtain uricase enzyme from Aspergillus niger and also to determine the production conditions and the effects of some factors on enzyme activity. The results of the experiments, in consideration of the production of the uricase enzyme and the factors affecting the production, demonstrated that enzyme activity was maximum when the production time was 3 days at a temperature of 30ºC with the initial pH at 6.0 and inductor concentration at 0.1%. It was determined that ammonium compounds, which were added to the production medium, inhibited enzyme synthesis, and that MgS0_4 has an important role in …
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 …
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.
Histological Changes Induced By Sialoadenectomy And Flutamide On The Epididymal Tissue And Epididymal Abnormalities, M.Aydin Ketani̇, Ahmet Ersay, Yusuf Nergi̇z, Mustafa Deni̇z, Şennur Ketani̇
Histological Changes Induced By Sialoadenectomy And Flutamide On The Epididymal Tissue And Epididymal Abnormalities, M.Aydin Ketani̇, Ahmet Ersay, Yusuf Nergi̇z, Mustafa Deni̇z, Şennur Ketani̇
Turkish Journal of Biology
In this study the purpose was to determine the effect of sialoadenectomy (Maternal Epidermal Growth Factor deficiency) on epididymal development and to compare it with that of antiandrogen (Flutamide) application.Forty 12-week-old, sexually mature and pregnant Sprague-Dawley rats were chosen as the animal model. They were divided into four groups; Group I : Control group, Group II : Sialoadenectomized (mated on 28^{th} day), Group III: Flutamide applied (between gestational day 11 and 21), Group IV: Sialoadenectomy + Flutamide applied. After birth, all male rats were observed morphologically on the 60th day and sacrificed on the 60^{th} day postpartum under general anaesthesia. …
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 …
In Vitro Propagation Of Thymus Sipyleus Boiss. (Lamiaceae), Bengi̇ Baba Erdağ, A. Kami̇l Yürekli̇
In Vitro Propagation Of Thymus Sipyleus Boiss. (Lamiaceae), Bengi̇ Baba Erdağ, A. Kami̇l Yürekli̇
Turkish Journal of Biology
In vitro propagation of Thymus sipyleus Boiss. (Lamiaceae), an endemic from western Anatolia was investigated. Sterilized seeds of the plant were germinated on modified Murashige-Skoog medium (mMS) and Heller's nutrient media. Then, seedlings were transferred to Murashige-Skoog basal medium containing 0.4 mg/l Naphtaleneacetic acid, (NAA) and 3 mg/l Benzyladenin (BA) and then they formed callus where they were in contact with the medium. Plantlets which regenerated on the same medium formed multiple shoots within 2 weeks and they were rooted after the 4th subculture.
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 …
Production Of Monoclonal Antibodies Specific Forprogesterone, Fatma Şahi̇ngöz Yücel, Beyazit Çirakoğlu
Production Of Monoclonal Antibodies Specific Forprogesterone, Fatma Şahi̇ngöz Yücel, Beyazit Çirakoğlu
Turkish Journal of Biology
Progesterone levels in milk and serum are indicators of pregnancy in cattle. The progesterone level reaches a peak on the 21 st and 22 nd days of pregnancy. Monoclonal antibodies specific to progesterone could be used for the immunodetection of milk and serum progesterone levels. We report here the development of hybrid cells prdoducing monoclonal antibodies specific for progesterone using hybridoma technology. Hybridoma cells secreting monoclonal antibodies against progesterone (MAM 2H11, MAM 6G6) were developed by fusion of the spleen cells of an immunized BALB/c mouse with FO (ATCC CRL 1646) mouse myeloma cells. These monoclonal antibodies were characterized for …
Ultrastructural Observations On Connectioncomplexes Between The Mural Trophoblast Cells Ofblastocyst In The Rat, Ramazan Demi̇r, İsmai̇l Üstünel, Necdet Demi̇r
Ultrastructural Observations On Connectioncomplexes Between The Mural Trophoblast Cells Ofblastocyst In The Rat, Ramazan Demi̇r, İsmai̇l Üstünel, Necdet Demi̇r
Turkish Journal of Biology
It is generally accepted that implantation morphologically consists of the establishment of a contact between the blastocyst and the uterine tissues. During this contact and interaction process, many physiological, biochemical and ultrastructural factors are involved. The aim of this study was to describe the ultrastructure of connection complexes between mural trophoblast cells in the blastocystic ring in the rat. Implantation sites obtained from rats on day 5 of pregnancy were studied ultrastructurally. Connected complexes were observed between mural trophoblast cells in different three types: a) dense long line connection; b) desmosome-like sturctures; c) regular suture-like interdigitation resembling parallel railings. According …
The Accumulation And Histological Effects Of Theorganometallic Fungicide Propineb On The Organsof Fetuses And Female Rats During Pregnancy, Kemal Güven, Engi̇n Deveci̇, Davi̇d De Pomerai
The Accumulation And Histological Effects Of Theorganometallic Fungicide Propineb On The Organsof Fetuses And Female Rats During Pregnancy, Kemal Güven, Engi̇n Deveci̇, Davi̇d De Pomerai
Turkish Journal of Biology
Dithiocarbamate propineb is an organometal fungicide, which is widely used for the control of diseases in plants. Female Wistar rats were exposed orally to propineb concentrations of 200 and 400 ppm, from the 6th day of gestation up to birth. At 400 ppm, propineb showed a variety of macroscopic (e.g. ptosis and paralysis) and microscopic symptoms in the organs of both fetuses and female rats. We found that the body weights of both one-day old litters and their propineb-treated mothers were lower than those of the controls. Histological examination of the livers and kidneys of the fetuses and propineb-treated pregnant …
Lack Of Minority Advantage In Drosophilamelanogaster Mutants, Şükran Çakir, Aykut Kence
Lack Of Minority Advantage In Drosophilamelanogaster Mutants, Şükran Çakir, Aykut Kence
Turkish Journal of Biology
The objective of this study was to test the generality of frequency-dependent fitness in the mating behavior of Drosophila, called the minority effect and to investigate the effect of artificial olfactory cues and marking the flies by wing cillipng on the frequency-dependent mate choice. In the mating experiments using wild type (oregon) and mutant (white-eyed, sepia, ebony) strains of Drosophila melanogaster, the mating success of mutant males did not increase as their frequency decreased. In addition, the olfactory cue hypothesis was not supported by the results of the experiments with artificial scent. The results of this study did not support …
Purification And Characterization Of Cysteine-43mutant Citrate Synthase From Thermoplasmaacidophilum, İpek Erduran, Semra Kocabiyik
Purification And Characterization Of Cysteine-43mutant Citrate Synthase From Thermoplasmaacidophilum, İpek Erduran, Semra Kocabiyik
Turkish Journal of Biology
Two cysteine residues were introduced to selected positions (Serine-309 and Serine-43) of the Thermoplasma acidophilum citrate synthase. Serine-309 Cysteine mutation drastically reduced the activity, as well as the thermostabiity of the enzyme. Although Serine-43 Cysteine mutation reduced the enzyme activity, it did not have any effect on the thermostability. Both wild-type and cysteine-43 mutant Thermoplasma citrate synthase enzymes were purified to homogenity using affinity chromatography on Matrex Gel Red A. The cysteine-43 mutant Thermoplasma citrate synthase was strikingy similar to the wild-type recombinant citrate synthase in its molecular size, substrate and co-factor specificities, pH profile and thermal resistance. The decrease …
Determination Of The Presence Of Crpgenes Instaphylococcus Aureus, Staphylococcus Epidermidis,Lactobacillus Delbrueckii Andcorynebacterium Verasuş, Ali̇ Osman Beldüz, Zi̇hni̇ Demi̇rbağ, Sabri̇ye Dülger, Ali̇ Osman Kiliç
Determination Of The Presence Of Crpgenes Instaphylococcus Aureus, Staphylococcus Epidermidis,Lactobacillus Delbrueckii Andcorynebacterium Verasuş, Ali̇ Osman Beldüz, Zi̇hni̇ Demi̇rbağ, Sabri̇ye Dülger, Ali̇ Osman Kiliç
Turkish Journal of Biology
Polymerase chain reaction (PCR) was employed to detect the presence of cyclic AMP receptor protein (CPR) in a number of diverse organisms. In PCR, two primers specific to the crp gene of Escherichia coli were used. Staphylococcus aureus, Staphylococcus epidermidis, Lactobacillus delbrueckii and Corynebacterium veraSuş all showed the same size of PCR frağments (708 bp) and same restriction frağment length polymorphizm (RFLP).
Properties Of The Rhodopseudomonas Palustrisstrains Isolated From An Alkaline Lake In Turkey, Gönül Çeti̇nkaya Dönmez, Ayten Öztürk, Lütfü Çakmakçi
Properties Of The Rhodopseudomonas Palustrisstrains Isolated From An Alkaline Lake In Turkey, Gönül Çeti̇nkaya Dönmez, Ayten Öztürk, Lütfü Çakmakçi
Turkish Journal of Biology
31 photoheterotrophic bacteria were isolated from Lake Aksehir sediment. Identification of the strains was based on morphological properties, motility and pigment composition, and also physiological properties such as carbon utilization and ability to respire anaerobically and aerobically in the dark. All strains were identified as Rhodopseudomonas palustris, but some strains were distinct from R. palustris with regard to vitamin requirement, malate utilization and aerobic growth in the dark. Until now, R. palustris had not been reported from an alkaline lake, and the strains growing alkaline pH (9) could be new strains of R. palustris.
Isolation And Abundance Of Unicellularcyanobacteria From Mosquito Development Sites, Gönül Çeti̇nkaya Dönmez, Ayşe Elmaci, Olcay Obali, Ayten Öztürk, Lütfü Çakmakçi
Isolation And Abundance Of Unicellularcyanobacteria From Mosquito Development Sites, Gönül Çeti̇nkaya Dönmez, Ayşe Elmaci, Olcay Obali, Ayten Öztürk, Lütfü Çakmakçi
Turkish Journal of Biology
The genus composition of cyanobacteria (particularly Chroococcus sp.) and their abundance in mosquito breeding sites at Lake Mogan (Ankara, Turkey) increased from August to September. Six unicellular cyanobacteria that had different morphological properties were isolated and succesfully cultivated. According to the mode of division, these six strain were classified as the represantatives of subgroup 1 (order Choroococcales). One of the isolates was identified as Synechococcus sp. and one as Gloeocapsa sp., and four were identified as Synechocystic sp. One of the four Synechocystis spp. was shown to be capable of heterotrophic growth.
Determination Of Salt Tolerance In Some Grapevinecultivars ( Vitis Vinifera L.) Under In Vitro Conditions, Nuray Si̇vri̇tepe, Ati̇lla Eri̇ş
Determination Of Salt Tolerance In Some Grapevinecultivars ( Vitis Vinifera L.) Under In Vitro Conditions, Nuray Si̇vri̇tepe, Ati̇lla Eri̇ş
Turkish Journal of Biology
Salinity tests were conducted on Çavus, Müsküle and Sultani Çekirdeksiz grapevine cultivars under in vitro conditions. Plant materials used in the salinity test were propagated using the axillary bud culture method. Single-node shoots were subjected to five different NaCl concentrations (0.00,0.25, 0.50, 0.75 and 1.00%) in MS+5 M BA medium for two periods (4 and 8 weeks). Proliferation, growth, total chlorophyll content and viability of explants decreased due to the increase in NaCl concentration and length of treatment period. Moreover, it was determined that salt treatment caused necroses in explants and the severity of this injury varied depending on the …
Toxicity Of Zinc, Copper And Lead To Idotea Baltica(Crustacea, Isopoda), Levent Bat, Murat Sezgi̇n, Ayşe Gündoğdu, Mehmet Çulha
Toxicity Of Zinc, Copper And Lead To Idotea Baltica(Crustacea, Isopoda), Levent Bat, Murat Sezgi̇n, Ayşe Gündoğdu, Mehmet Çulha
Turkish Journal of Biology
The acute toxicity of zinc, copper and lead to the marine invertebrate Idotea baltica (Crustacea, Isopoda) was evaluated by static bioassays, calculating the LT 50 (lethality time for 50%) for males and females. Survival time decreased with increasing concentrations of zinc, copper and lead. Zinc was more toxic to Idotea than copper and lead. Lead was the least toxic of the metals tested.
Salinity Resistance Of Certain Rice ( Oryza Sativa L.)Cultivars, Mehmet Alpaslan, Aydin Güneş, Süleyman Taban
Salinity Resistance Of Certain Rice ( Oryza Sativa L.)Cultivars, Mehmet Alpaslan, Aydin Güneş, Süleyman Taban
Turkish Journal of Biology
A greenhouse experiment was carried out to evaluate the response of six rice ( Oryza sativa L.) cultivars (Ribe, Tri-445, Serhat 92, Kros 424, Baldo and Rocca) to NaCI salinity. While salinity inhibited the growth of all six cultivars, Baldo, Ribe, Rocca and Kros-424 were less affected than the other cultivars. Salt treatment increased Na and CI content of the plants, while it decreased K content. In general, the proline content and stomatal resistance of the cultivars were increased by salt treatment.
Biodegradation Of Homocyclic And Heterocyclicaromatic Compounds Byrhodopseudomonas Palustris Strains, Gönül Çeti̇nkaya Dönmez, Ayten Öztürk
Biodegradation Of Homocyclic And Heterocyclicaromatic Compounds Byrhodopseudomonas Palustris Strains, Gönül Çeti̇nkaya Dönmez, Ayten Öztürk
Turkish Journal of Biology
Six strains were isolated from Lake Aksehir (Konya-Turkey) and identified as Rhodopseudomonas palustris on the basis of physiological and morphological characteristics. The strains grew phototrophically on a variety of aromatic compounds (under illuminated anaerobic conditions), namely, benzoate, hippurate, benzyl alcohol, 2-amino benzoic acid, phloroglucinol, phenylacetic acid, catechol, pyridine and pyrazoline. Biodegradation of 2-amino benzoate, phloroglucinol, catechol, pyridine and pyrazolin by Rhodopseudomonas palustrisstrains have not been reported in the literature.
Acute Lethal Toxicity And Accumulation Of Copper Ingammarus Pulex (L.) (Amphipoda), Kemal Güven, Cengi̇zhan Özbay, Erhan Ünlü, Ali̇ Satar
Acute Lethal Toxicity And Accumulation Of Copper Ingammarus Pulex (L.) (Amphipoda), Kemal Güven, Cengi̇zhan Özbay, Erhan Ünlü, Ali̇ Satar
Turkish Journal of Biology
Gammarus pulex (L.) collected from clean sites around Kabakli pond (Diyarbakır) was acclimatized at 15°C for 10 days. The individuals were placed in 1lt. vessels and exposed to Cu ++ concentrations of 0.05, 0.08, 0.10, 0.15, 0.20, 0.30 and 0.50 ppm to determine both 24, 48, 72 and 96 h LC50 values and Cu ++ accumulation over 96h. LC 50 values at 24, 48, 72 and 96 h were calculated to be 0.2, 0.17, 0.12 and 0.1 ppm, respectively. Acute copper accumulation in gammarids exposed to various copper concentrations over 96 h was determined using an atomic absorption spectrophotometer. An …
Contributions To The Pollen Morphology Of Thefamily Compositae, Anjum Perveen
Contributions To The Pollen Morphology Of Thefamily Compositae, Anjum Perveen
Turkish Journal of Biology
The pollen morphology of 24 species of Compositae belonging to 18 genera was examined by light and scanning microscopy. The present data confirms the eurypalynous nature of the family. Delimitation of the genera on the basis of pollen characters is less marked. Pollen grains usually radially symmetrical, isopolar rarely apolar; tricolporate, often porate. Shape commonly oblate-spheroidal to prolate-spheroidal, with some suboblate to subprolate types. Tectum echinate to echinolophate, often non-echinate. Tectum in-between the spines or spinules is sub-psilate, or perforated to striate. On the basis of the exine pattern, 4 distinct pollen types are recognized viz., Pollen type-I: Dicoma tomentosa, …