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Articles 1 - 30 of 32
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A Gene Expression Study Of The Tgf-\Beta Signaling Pathway Components In Differentiating Pc12 Cells, Işil Aksan Kurnaz
A Gene Expression Study Of The Tgf-\Beta Signaling Pathway Components In Differentiating Pc12 Cells, Işil Aksan Kurnaz
Turkish Journal of Biology
The neuronal differentiation process has been studied in great detail from many aspects. In the PC12 system, NGF was found to induce neuronal differentiation as measured by neurite extensions and neuronal marker expression. This effect was seen to be mainly conducted through the Ras/MAPK pathway; however, additional pathways are suspected to play a significant role in this cellular response. One such pathway is Smad signaling - NGF was previously reported to induce the expression of the TGF-\beta signal, although the physiological relevance of this was not completely understood. In this study, we analyzed the expression profiles of several TGF-\beta pathway …
Biological Control Of Vector Mosquitoes By Some Common Exotic Fish Predators, A. Ghosh, S. Mandal, I. Bhattacharjee, Goutam Chandra
Biological Control Of Vector Mosquitoes By Some Common Exotic Fish Predators, A. Ghosh, S. Mandal, I. Bhattacharjee, Goutam Chandra
Turkish Journal of Biology
Predation experiments using Cyprinus carpio Linnaeus (1758), Ctenopharyngodon idella (Valenciennes 1844), Oreochromis niloticus niloticus (Linnaeus 1758) and Clarias gariepinus (Burchell 1822) were conducted against fourth instar Anopheles stephensi Liston (1901) larvae and pupae at varying prey and predator densities. The relative prey consumption rates of the four fish species for An. stephensi larvae and pupae during 24-hour experiments under laboratory conditions were C. gariepinus > C. idella > C. carpio > O. n. niloticus. Predatory efficacy was positively related with prey density and inversely related with water volume (search area). A significant decrease in larval abundance in dipper samples was observed at 30 …
Identification Of Alkaliphilic Bacillus Species Isolated From Lake Van And Its Surroundings By Computerized Analysis Of Extracellular Protein Profiles, İsmet Berber, Elçi̇n Yeni̇dünya
Identification Of Alkaliphilic Bacillus Species Isolated From Lake Van And Its Surroundings By Computerized Analysis Of Extracellular Protein Profiles, İsmet Berber, Elçi̇n Yeni̇dünya
Turkish Journal of Biology
Five reference Bacillus species and 17 native alkaliphilic Bacillus strains, isolated from the water of Lake Van and the soil surrounding it, were identified using phenotypic characteristics and extracellular protein profiles by the method of sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). According to the phenotypic characteristics, all the native isolates were Gram-positive, aerobic, endospore-forming, motile, facultatively alkaliphilic Bacillus spp. It was also found that the native alkaliphilic Bacillus isolates were distinguished phenotypically from other Bacillus species. A numerical analysis based on the resulting extracellular protein profiles revealed 5 distinct clusters: native isolates and B. megaterium formed 4 clusters that varied …
Phytoplankton Biomass And Species Composition Of Lake Gölbaşı (Hatay-Turkey), Mehmet Naz, Mustafa Türkmen
Phytoplankton Biomass And Species Composition Of Lake Gölbaşı (Hatay-Turkey), Mehmet Naz, Mustafa Türkmen
Turkish Journal of Biology
Seasonal distributions of phytoplanktonic organisms in Lake Gölbaşı were investigated in samples collected from 2 stations between May, 2001, and April, 2002. At each station, monthly sampling was performed from the surface water. The flora consisted of 41 taxa belonging to Bacillariophyta (24), Chlorophyta (12), Pyrrophyta (2), Cyanophyta (2) and Chrysophyta (1). During the 1-year study period, the most dominant group was Chrysophyta followed by Bacillariophyta, Chlorophyta, Cyanophyta and Pyrrophyta. The highest numbers of Chrysophyta were observed in both stations in May, 2001, January, 2002 and April, 2002. Bacillariophyta had the highest biomass in both stations, followed by Chrysophyta, Pyrrophyta, …
Efficient Cloning Of The Rare Wheat (Triticum Aestivum L.) Transcripts, Muharrem Di̇lbi̇rli̇ği̇, Mustafa Erayman
Efficient Cloning Of The Rare Wheat (Triticum Aestivum L.) Transcripts, Muharrem Di̇lbi̇rli̇ği̇, Mustafa Erayman
Turkish Journal of Biology
Expressed sequence tag (EST) technology has spurred targeting the functional portion of genomes for several organisms. Constructed redundant complementary DNA (cDNA) libraries have targeted a majority of constitutive and over-expressed genes. However, the majority of lowly expressed and un-induced genes have not been able to be easily tagged and cloned. The objective of this study was to clone low and rarely expressed transcripts in wheat. Using a combination of a polyacrylamide gel and a motif-based PCR amplification, we cloned 144 bands containing 189 wheat fragments. Sequence analysis revealed 74 contigs, of which only 22 being present in database. The remaining …
Effects Of Mercury And Chromium On Peroxidase And Iaa Oxidase Enzymes In The Seedlings Of Phaseolus Vulgaris, Nayna G. Parmar, Sumitra Chanda
Effects Of Mercury And Chromium On Peroxidase And Iaa Oxidase Enzymes In The Seedlings Of Phaseolus Vulgaris, Nayna G. Parmar, Sumitra Chanda
Turkish Journal of Biology
Phaseolus seedlings (Phaseolus vulgaris L.) in light conditions were treated with 2 different concentrations of 2 heavy metals, mercury (0.05 mM and 0.4 mM) and chromium (0.5 and 1.0 mM). Mercury was given in the form of HgCl_2 and chromium was given in the form of K_2Cr_2O_7. Peroxidase activity was measured with 4 different hydrogen donors (ferulic acid, caffeic acid, pyrocatechol and pyrogallol). Both mercury and chromium inhibited root and hypocotyl length. The inhibition was about 50%-80%, depending on the concentration of the heavy metal. Peroxidase and IAA oxidase activities showed a clear inverse relation with growth. Seedlings treated with …
Competitive Abilities Of The Entomopathogenic Nematodes Steinernema Feltiae And Heterorhabditis Bacteriophora In The Same Host At Different Temperatures, Hi̇lal Aydin, Alper Susurluk
Competitive Abilities Of The Entomopathogenic Nematodes Steinernema Feltiae And Heterorhabditis Bacteriophora In The Same Host At Different Temperatures, Hi̇lal Aydin, Alper Susurluk
Turkish Journal of Biology
The effectiveness of Turkish strains of the entomopathogenic nematodes Steinernema feltiae and Heterorhabditis bacteriophora on the last instar larvae of Tenebrio molitor were investigated. Mortality rates of T. molitor larvae caused by each nematode species alone (experiment I) were determined. Then, with the same method, the effectiveness of each species over the other in competition was examined (experiment II). Both experiments were conducted in sterilesand at 12, 18 and 25 °C for 5 days. While in experiment I the efficiency of the species was determined to be 52.5% for H. bacteriophora and 85% for S. feltiae at 12 °C, 93.5% …
An Sem Study Of The Sporulation Process Of Pandora Neoaphidis And Neozygites Fresenii, Özlem Kalkar
An Sem Study Of The Sporulation Process Of Pandora Neoaphidis And Neozygites Fresenii, Özlem Kalkar
Turkish Journal of Biology
The objective of this study was to investigate the development of fungal pathogens in aphid hosts and identify structures characteristic of each fungal species. Aphids infected by Pandora neoaphidis and Neozygites fresenii were incubated for different time periods and examined by SEM. In P. neoaphidis, hyphal bodies concentrated in clumps beneath the cuticle and these formed rosette patterns consisting of a central structure, the developing cystidium, surrounded by developing conidiophores. Rhizoids were the first structure emerging from the P. neoaphidis-killed aphid. Primary spores were formed after 6 h and secondary spores after 10 h of incubation. In N. fresenii, the …
The Effect Of Agricultural Practices On The Spatial Variability Of Arbuscular Mycorrhiza Spores, Ali Akbar Safari Sinegani, Ali Akbar Mahboobi, Farzad Nazarizadeh
The Effect Of Agricultural Practices On The Spatial Variability Of Arbuscular Mycorrhiza Spores, Ali Akbar Safari Sinegani, Ali Akbar Mahboobi, Farzad Nazarizadeh
Turkish Journal of Biology
The main objective of this paper is to assess the spatial variability of arbuscular mycorrhizal (AM) spore numbers in following two contrasting soil uses. Adjacent plots, one irrigated farmland and the other dry farmland, were marked on a transect (300 m long), with 10-m spacing. Soil samples were collected at 0-30 and 30-60 cm depth and were then analyzed for AM spore numbers and some other soil properties. The analytical results were submitted to different kinds of analysis: classical statistical and geostatistical analysis which showed that coefficient of variations (CV's) and standard deviations for spore numbers in both farmlands were …
Antimicrobial Effects Of Ocimum Basilicum (Labiatae) Extract, Ahmet Adigüzel, Medi̇ne Güllüce, Meryem Şengül, Hati̇ce Öğütçü, Fi̇kretti̇n Şahi̇n, İsa Karaman
Antimicrobial Effects Of Ocimum Basilicum (Labiatae) Extract, Ahmet Adigüzel, Medi̇ne Güllüce, Meryem Şengül, Hati̇ce Öğütçü, Fi̇kretti̇n Şahi̇n, İsa Karaman
Turkish Journal of Biology
Ethanol, methanol, and hexane extracts from Ocimum basilicum Labiatae (sweet basil) were investigated for their invitro antimicrobial properties. A total of 146 microbial organisms belonging to 55 bacteria, and four fungi, and a yeast species were studied using a disk-diffusion and minimal inhibition concentration (MIC) method. The result showed that none of the three extracts tested have antifungal activities, but anticandidal and antibacterial effects. Both the hexane and methanol extracts, but not the ethanol extracts, inhibited three isolates out of 23 strains of Candida albicans studied. All three extract of O. basilicum were different in terms of their antibacterial activities. …
Changes In Antioxidative Enzymes Of Young And Mature Leaves Of Tomato Seedlings Under Drought Stress, Serpi̇l Ünyayar, Fazi̇let Özlem Çeki̇ç
Changes In Antioxidative Enzymes Of Young And Mature Leaves Of Tomato Seedlings Under Drought Stress, Serpi̇l Ünyayar, Fazi̇let Özlem Çeki̇ç
Turkish Journal of Biology
The effects of exogenous abscisic acid (ABA) on antioxidant enzymes of young and mature leaves of 4-week old Lycopersicon esculentum cv. Ailsa Craig and ABA-deficient mutant, notabilis, were investigated under drought stress. Although ABA induced increases in ascorbate peroxidase (APX), glutathione reductase (GR) and catalase (CAT) activities in drought-stressed young leaves of notabilis, CAT activities remained unchanged in both ABA-treated young and mature leaves of Ailsa Craig under drought. Superoxide dismutase (SOD) activity did not substantially increase in notabilis or Ailsa Craig in all treatments. APX activity significantly increased in ABA-, drought- and drought+ABA- treated young leaves of notabilis. These …
Exogenous Application Of Gibberellic Acid Counteracts The Ill Effect Of Sodium Chloride In Mustard, Shaheena Afroz, Firoz Mohammad, Shamsul Hayat, Manzer H. Siddiqui
Exogenous Application Of Gibberellic Acid Counteracts The Ill Effect Of Sodium Chloride In Mustard, Shaheena Afroz, Firoz Mohammad, Shamsul Hayat, Manzer H. Siddiqui
Turkish Journal of Biology
The response of mustard (Brassica juncea (L.) Czern & Coss cv. Varuna) to presowing seed treatment with sodium chloride (NaCl) was investigated. The plants raised from treated seeds were sprayed with water or 10^{-6} M GA_3 at the 30- day stage. The seeds imbibed in 1 or 10 mM of NaCl resulted in a decrease in dry mass, leaf chlorophyll content, carbonic anhydrase activity (E.C. 4.2.1.1), nitrate reductase activity (E.C. 1.6.6.1) and net photosynthetic rate at the 60-day stage, and pod number and seed yield at harvest. However, spray application of GA_3 neutralized the ill effect of soaking treatment in …
Effect Of Carboxy Methyl Cellulose And Gum Arabic On The Stability Of Frozen Dough For Bakery Products, Ali̇ Asghar, Muhammad Waseem Traig, Faqir Muhammad Anjum, Shahzad Hussain
Effect Of Carboxy Methyl Cellulose And Gum Arabic On The Stability Of Frozen Dough For Bakery Products, Ali̇ Asghar, Muhammad Waseem Traig, Faqir Muhammad Anjum, Shahzad Hussain
Turkish Journal of Biology
Extended storage of frozen dough resulted in changes in rheological properties, which cause increasing proofing time and ultimately lower loaf volume of bread. The main causes of these changes are ice crystallization, which damage the gluten network. The major objective of this research was to reduce ice crystallization in frozen dough by incorporation of hydrophilic gums such as carboxymethylcellulose (CMC), and gum arabic at different levels. The doughs were stored frozen up to 8 weeks. Bread characteristics were analyzed after every 15 days for specific loaf volume, external and internal characteristics. Specific loaf volume increased significantly with the addition of …
Characterization Of The Fungal Pathogen, Entomophaga Aulicae (Zygomycetes: Entomophthorales) In Larval Populations Of The Green Cloverworm, Plathypena Scabra (Lepidoptera: Noctuidae), Özlem Kalkar, Gerald R. Carner
Characterization Of The Fungal Pathogen, Entomophaga Aulicae (Zygomycetes: Entomophthorales) In Larval Populations Of The Green Cloverworm, Plathypena Scabra (Lepidoptera: Noctuidae), Özlem Kalkar, Gerald R. Carner
Turkish Journal of Biology
Entomophaga aulicae was monitored in populations of noctuid lepidopteran pests of soybean during the 2000, 2001, and 2002 growing seasons in South Carolina and infected only Plathypena scabra larvae. No infection by E. aulicae was detected in 2002. Average infection levels of E. aulicae in P. scabra populations in Blackville were 6.0% and 20.0% in 2000 and 2001, respectively. At Clemson, infection was 15.0% and 23.3% for the two sampling weeks in 2000, and infection reached a high of 50.0% in 2001. Pyriform, multinucleate conidia and spherical to slightly oval resting spores were the primary features of this fungus. When …
High Quality Dna Isolation Method For Chickpea Genotypes, Hasi̇be Ci̇ngi̇lli̇, Abdulkadi̇r Akçi̇n
High Quality Dna Isolation Method For Chickpea Genotypes, Hasi̇be Ci̇ngi̇lli̇, Abdulkadi̇r Akçi̇n
Turkish Journal of Biology
In chickpea breeding genetic studies of individual plants need to be evaluated at the DNA level using molecular markers. A simple and reliable DNA extraction method is a prerequisite. This small-scale method is cetyltrimethylammonium bromide (CTAB)-based and extracts DNA from 1 to 3 folded young leaves processed in a 1.5 ml tube with 0.5 ml of extraction buffer and homogenized using an electric drill. Compared with the micro-prep method the improved mini-prep CTAB method is highly efficient and much cheaper in terms of time, chemical use and labor input. About 49 samples per day can easily be processed by one …
Indole Acetic Acid Production By The Indigenous Isolates Of Azotobacter And Fluorescent Pseudomonas In The Presence And Absence Of Tryptophan, Farah Ahmad, Iqbal Ahmad, Mohammad Saghir Khan
Indole Acetic Acid Production By The Indigenous Isolates Of Azotobacter And Fluorescent Pseudomonas In The Presence And Absence Of Tryptophan, Farah Ahmad, Iqbal Ahmad, Mohammad Saghir Khan
Turkish Journal of Biology
A total of 21 bacterial isolates (Azotobacter sp., 10 and fluorescent Pseudomonas sp., 11) were isolated from different rhizospheric soils in the vicinity of Aligarh city and characterized as per standard methods. These isolates were further tested for the production of indole acetic acid (IAA) in a medium with 0, 1, 2 and 5 mg/ml of tryptophan. A low amount (2.68-10.80 mg/ml) of IAA production was recorded by Azotobacter strains without tryptophan addition. Seven Azotobacter isolates showed high level (7.3 to 32.8 mg/ml) production of IAA at 5 mg/ml of tryptophan while at 1 and 2 mg/ml the production was …
Prophylactic Efficacy Of Crushed Garlic Lobes, Black Seed Or Olive Oils On Cholinesterase Activity In Central Nervous System Parts And Serum Of Lead Intoxicated Rabbits, Maged M. Yassin
Turkish Journal of Biology
The effect of lead on cholinesterase activity in various central nervous system (CNS) parts and in serum, and the potential of crushed fresh garlic lobes, black seed and olive oils to combat lead poisoning in rabbits were assessed. Oral administration of lead acetate elevated BLL compared to control and sodium acetate groups. This increase was a function of the experimental time. Treatment of animals with crushed fresh garlic lobes, black seed or olive oils lowered BLL, with garlic was the most effective. Lead caused progressive decrease in the activity of acetylcholinesterase in different brain regions and spinal cord allover the …
Enterotoxigenic Staphylococcus Aureus In Raw Milk In The North Of Palestine, Ghaleb Mohammad Adwan, Bassam Abu-Shanab, Kamel Adwan
Enterotoxigenic Staphylococcus Aureus In Raw Milk In The North Of Palestine, Ghaleb Mohammad Adwan, Bassam Abu-Shanab, Kamel Adwan
Turkish Journal of Biology
Enterotoxin genes (sea-see) in Staphylococcus aureus isolates recovered from milk of clinically healthy sheep and cows in the north of Palestine were determined using a polymerase chain reaction (PCR). Thirty-seven (37%) out of 100 S. aureus isolates were toxin gene positive. Four strains (10.8%) were sea-positive, 20 (54.1%) were seb-positive, 4 (10.8%) were sec-positive, 6 (16.2%) were sed-positive and 3 (8.1%) were see-positive. None of these enterotoxigenic isolates carried more than one toxin gene. This study indicates that the presence of enterotoxigenic S. aureus in raw milk can contribute to the sources of staphylococcal food poisoning in Palestine.
The Effect Of Acid Adaptation Conditions On Acid Tolerance Response Of Escherichia Coli O157: H7, Hali̇l Tosun, Şahi̇ka Aktuğ Gönül
The Effect Of Acid Adaptation Conditions On Acid Tolerance Response Of Escherichia Coli O157: H7, Hali̇l Tosun, Şahi̇ka Aktuğ Gönül
Turkish Journal of Biology
This study examined the effects of acid shock and acid adaptation on acid tolerance of E. coli O157: H7 932 strain. E. coli O157: H7 were exposed to acid at pH 4.5, 5.0 or 5.5 for acid adaptation or acid shock in tryptic soy broth (acidified with 6 N HCI). Acid shocked cells were incubated for 1, 2, 3 or 4 h while acid adapted cells were incubated for 18 h at 37°C and then acid tolerance of acid shocked and acid adapted cells were determined by exposing to acid challenge of pH 2.5 or 3.0 in tryptic soy broth. …
Phylogenetic Analysis Of Vascular Endothelial Growth Factor Diversity, Murat Kasap
Phylogenetic Analysis Of Vascular Endothelial Growth Factor Diversity, Murat Kasap
Turkish Journal of Biology
The secreted glycoprotein vascular endothelial growth factor (VEGF) is a potent and specific mitogen for vascular endothelial cells, capable of stimulating angiogenesis during embryonic development and tumor formation. Despite intensive research, the functions of several VEGF family members remain a mystery. Insight into their evolutionary relationships could profoundly improve our understanding of why there are so many VEGFs and why we have not been able to dissect their function to our satisfaction. It appears from the presence of several structurally related VEGF proteins that VEGF proteins do have a long divergence history. We investigated the evolution and phylogenetic relationships among …
Antibacterial Activity Of Some Selected Indian Medicinal Flora, Rathish Nair, Tamanna Kalariya, Sumitra Chanda
Antibacterial Activity Of Some Selected Indian Medicinal Flora, Rathish Nair, Tamanna Kalariya, Sumitra Chanda
Turkish Journal of Biology
Nine plants were screened for potential antibacterial activity. In evaluating antibacterial activity both aqueous and organic solvents were used. The plants screened were Sapindus emarginatus, Hibiscus rosa-sinensis, Mirabilis jalapa, Rheo discolor, Nyctanthes arbortristis, Colocasia esculenta, Gracilaria corticata, Dictyota spps., and Pulicaria wightiana. Antibacterial activity was tested against 6 bacterial strains, Pseudomonas testosteroni, Staphylococcus epidermidis, Klebsiella pneumoniae, Bacillus subtilis, Proteus morganii, and Micrococcus flavus. Two methods, Agar disk diffusion and Agar ditch diffusion, were used to study the antibacterial activity of all these plants. Ps. testosteroni and K. pneumoniae were the most resistant bacterial strains. S. emarginatus showed strong activity against …
Emerging Vector-Borne Diseases In A Changing Environment, Nurdan Özer
Emerging Vector-Borne Diseases In A Changing Environment, Nurdan Özer
Turkish Journal of Biology
Vector-borne infectious diseases are emerging or resurging as a result of changes in public health policy, demographic and societal changes, insecticide and drug resistance, shift in emphasis from prevention to emergency response, genetic changes in pathogens in the last two decades of the twentieth century. Climate changes also can influence the emergence and reemergence of these diseases which are malaria, dengue, yellow fever, plague, filariasis, louse-borne typhus, lyme disease, trypanosomiasis, leishmaniasis and viral diseases. West Nile virus is just the latest example of this type of invasion by exotic virus. This paper will provide an overview of the distribution, reasons …
Epipelic And Epilithic Algae Of Küçükgöl Lake (Gümüşhane-Turkey), Bülent Şahi̇n, Bülent Akar
Epipelic And Epilithic Algae Of Küçükgöl Lake (Gümüşhane-Turkey), Bülent Şahi̇n, Bülent Akar
Turkish Journal of Biology
The epipelic and epilithic algae of Küçükgöl Lake were studied between June and September 2002. Fifty-five taxa (26 belonging to Bacillariophyta, 23 to Chlorophyta, 3 to Cyanophyta and 3 to Euglenophyta) were determined. Closterium lunula var. biconvexum, Cosmarium asphaerosporum var. strigosum, C. garrolense, C. rectangulare, Euastrum ansatum var. dideltiforme, E. denticulatum and E. pseudotuddalense are new records for the algal flora of Turkey.
Effect Of \Alpha-Keto Acids Against H_2o_2- And Nan_3-Induced Mutagenesis In Different Strains Of Salmonella Typhimurium, Emi̇ne Öksüzoğlu
Effect Of \Alpha-Keto Acids Against H_2o_2- And Nan_3-Induced Mutagenesis In Different Strains Of Salmonella Typhimurium, Emi̇ne Öksüzoğlu
Turkish Journal of Biology
The protective effects of \alpha-keto acids on the mutagenicity of H_2O_2 and NaN_3 was investigated in Salmonella typhimurium TA 98, TA 100, TA 102. H_2O_2 (340 µg/plate) was mutagenic to the strains TA 98 and TA 102 while NaN_3 (1.5 µg/plate) was mutagenic only to TA100. The extents of protective effect of pyruvate (220-440 µg/plate) and \alpha-keto glutarate (335-600 µg/plate) against H_2O_2 were observed to be 37%- 65% in TA 98 and TA 102. \alpha-keto acids were ineffective against NaN_3 induced mutagenicity in TA 100. H_2O_2 (340 µg/plate), in the presence of NaN_3 (1.5 µg/plate) and \alpha-keto acids (330-500 µg/plate), …
Pb^{2+} Biosorption By Pretreated Fungal Biomass, Ahmet Çabuk, Semra İlhan, Cansu Fi̇li̇k, Fi̇gen Çalişkan
Pb^{2+} Biosorption By Pretreated Fungal Biomass, Ahmet Çabuk, Semra İlhan, Cansu Fi̇li̇k, Fi̇gen Çalişkan
Turkish Journal of Biology
The effect of pretreatment on the Pb^{2+} biosorption capacity of fungal biomasses, Aspergillus versicolor, Metarrhizium anisopliae var. anisopliae, and Penicillium verrucosum, was investigated. For this purpose, the biomasses were subjected to physical treatments such as heat and autoclaving, and chemical treatments such as sodium hydroxide, formaldehyde, gluteraldehyde, acetic acid, hydrogen peroxide, commercial laundry detergent, orthophosphoric acid and dimethyl sulfoxide. Dimethyl sulfoxide, hydrogen peroxide and gluteraldehyde increased biosorption of Pb^{2+} in comparison with the A. versicolor live biomass. M. anisopliae var. anisopliae biomass pretreated with hydrogen peroxide, gluteraldehyde, commercial laundry detergent, dimethyl sulfoxide and formaldehyde significantly improved biosorption of Pb^{2+} in …
Antimicrobial Effects Of Verbascum Georgicum Bentham Extract, Meryem Şengül, Hati̇ce Öğütçü, Ahmet Adigüzel, Fi̇kretti̇n Şahi̇n, Ayşe Aydan Kara, İsa Karaman, Medi̇ne Güllüce
Antimicrobial Effects Of Verbascum Georgicum Bentham Extract, Meryem Şengül, Hati̇ce Öğütçü, Ahmet Adigüzel, Fi̇kretti̇n Şahi̇n, Ayşe Aydan Kara, İsa Karaman, Medi̇ne Güllüce
Turkish Journal of Biology
The methanol extract of Verbascum georgicum Bentham (Scrophulariaceae) was investigated for its in-vitro antimicrobial properties. A total of 143 microorganisms belonging to 56 bacteria and 4 fungi and a yeast species were studied using the disk-diffusion method and microdilution assays. The results indicated that the methanol extract of V. geopgicum had an inhibitory effect on the growth of all Candida albicans isolates and 17 strains in 10 different species of bacteria, namely Bacillus amyloliquefaciens, B. subtilis, B. cereus, B. pumilus, B. megaterium, B. lentimorbus, B. licheniformis, Pseudomonas putida, P. syringae and Escherichia coli, at different concentrations ranging from 37.5 to …
Genetic Engineering Of Eukaryotic Algae With Special Reference To Chlamydomonas, Mostafa M. El-Sheekh
Genetic Engineering Of Eukaryotic Algae With Special Reference To Chlamydomonas, Mostafa M. El-Sheekh
Turkish Journal of Biology
No abstract provided.
Comparison Of Antibacterial Activities Of Selected Species Of Zingiberaceae Family And Some Synthetic Compounds, H. Chandarana, S. Baluja, Sumitra Chanda
Comparison Of Antibacterial Activities Of Selected Species Of Zingiberaceae Family And Some Synthetic Compounds, H. Chandarana, S. Baluja, Sumitra Chanda
Turkish Journal of Biology
This study describes the antibacterial activity of ginger (G), mangoginger (M) and turmeric (T) and mixtures thereof i.e. ginger and mangoginger (GM), ginger and turmeric (GT), turmeric and mangoginger (TM), and a mixture of peels (P) and 4 synthetic compounds (HC-1, HC-2, HC-3 and HC-4). Extracts of these compounds were studied on Escherichia coli, Bacillus subtilis and Staphylococcus aureus. Both aqueous (heated and unheated extracts) and organic solvents, 1, 4-Dioxan, N,N,dimethylformamide (DMF), were used for antibacterial assay. Growth inhibition was evaluated by the disc diffusion and agar ditch methods. The antibacterial activity of heated extracts was greater than that of …
Effects Of Carbon Sources And Various Chemicals On The Production Of A Novel Amylase From A Thermophilic Bacillus Sp. K-12, Özlem Eren Kiran, Uğur Çömlekçi̇oğlu, Burhan Arikan
Effects Of Carbon Sources And Various Chemicals On The Production Of A Novel Amylase From A Thermophilic Bacillus Sp. K-12, Özlem Eren Kiran, Uğur Çömlekçi̇oğlu, Burhan Arikan
Turkish Journal of Biology
The amylase producer thermophilic Bacillus sp. K-12 was isolated from soil samples from Zeytinli hot spring in Kahramanmaraş. Enzyme synthesis occurred at 20-55 ºC with an optimum of 42 ºC. There was a slight variation in amylase synthesis within the pH range 4.5-10.5. Effects of various carbon sources and chemicals on a-amylase production were examined and maximum a-amylase production was obtained in a medium containing 1% starch in 60 h. MnSO_4, ZnSO_4 and EDTA inhibited a-amylase production of Bacillus sp. K-12.
Incompatibility Alleles Expressed In Pollen Of Turkish Hazelnut Cultivars, Veli̇ Erdoğan, Shawn A. Mehlenbacher, A. İlhami̇ Köksal, Haydar Kurt
Incompatibility Alleles Expressed In Pollen Of Turkish Hazelnut Cultivars, Veli̇ Erdoğan, Shawn A. Mehlenbacher, A. İlhami̇ Köksal, Haydar Kurt
Turkish Journal of Biology
Sphorophytic pollen-stigma incompatibility is a characteristic of the genus Corylus. Incompatibility alleles expressed in the pollen of Turkish hazelnut cultivars were identified. Cultivars were selected from the field collection at Giresun, and were used as the pollen parents. Tester plants, whose S-alleles were known, were located in Ankara and Corvallis. Compatible crosses produced masses of long and parallel tubes while incompatible crosses produced very short tubes that often curved or ended with a pronounced bulb. The incompatibility alleles S_2, S_5, S_8, S_{10}, S_{12}, S_{21} and S_{24} were identified in the pollen of Turkish cultivars. Pollen of Palaz and Yuvarlak Badem …