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Articles 1 - 30 of 53
Full-Text Articles in Life Sciences
Physiological And Antioxidant Response Of Three Cultivars Of Cucumber (Cucumis Sativus L.) To Salinity, Gökçen Baysal Furtana, Ruki̇ye Tipirdamaz
Physiological And Antioxidant Response Of Three Cultivars Of Cucumber (Cucumis Sativus L.) To Salinity, Gökçen Baysal Furtana, Ruki̇ye Tipirdamaz
Turkish Journal of Biology
The effects of salinity on the growth, relative water content (RWC), chlorophyll content, inorganic ions, proline accumulation, lipid peroxidation and antioxidant enzymes, superoxide dismutase (SOD), ascorbate peroxidase (APOX), and catalase (CAT) of 3 cucumber (Cucumis sativus L.) cultivars (Çengelköy, Anadolu F1, and Beith Alpha) were investigated. Cucumber cultivars were grown in perlite culture and irrigated with half-strength Hoagland nutrient solution for a period of 35 days under controlled conditions. After this period, seedlings were treated with 150 mM NaCl solution and the plants were harvested on day 7 and day 14 of salt treatment. The fresh and dry weights, RWC, …
The Effects Of 2,4-Dichlorophenoxy Acetic Acid And Isoproturon Herbicides On The Mitotic Activity Of Wheat (Triticum Aestivum L.) Root Tips, Sanjay Kumar, Shashi Kiran Arya, B. K. Roy, Atul Kumar Singh
The Effects Of 2,4-Dichlorophenoxy Acetic Acid And Isoproturon Herbicides On The Mitotic Activity Of Wheat (Triticum Aestivum L.) Root Tips, Sanjay Kumar, Shashi Kiran Arya, B. K. Roy, Atul Kumar Singh
Turkish Journal of Biology
The effects of the herbicides 2,4-dichlorophenoxy acetic acid and isoproturon on 3 wheat (Triticum aestivum L.) varieties (HUW 234, HUW 468, and HUW 533) were studied with regards to mitotic abnormalities and chromosomal behavior. Pre-soaked seeds were treated with both herbicides at concentrations of 50-1200 ppm. Both 2,4-D and isoproturon were highly mito-inhibitory and induced chromosomal abnormalities, such as precocious movement, stickiness, and chromosome bridges, with and without laggards and fragments at the anaphase and telophase. The frequency of chromosomal anomalies in almost all the targets used was high at the maximum dose of both herbicides, individually as well as …
Nutritive Value Of Edible Wild And Cultured Mushrooms, Sevda Kirbağ, Mehmet Akyüz
Nutritive Value Of Edible Wild And Cultured Mushrooms, Sevda Kirbağ, Mehmet Akyüz
Turkish Journal of Biology
The nutritive value of Pleurotus ostreatus (Jacq. ex Fr.) Kumm., Pleurotus sajor-caju (Fr.) Singer, and Agaricus bisporus (Large) Sign. was determined. Dry matter, moisture, crude ash, protein, fat, cellulose, organic matter, and nitrogen-free extract were 89.7%-90.3%, 9.7%-10.3%, 6.0%-13.7%, 27.8%-41.6%, 0.5%-1.3%, 10.0%-16.2%, 76.0%-84.0%, and 26.7%-36.8% of dry weight, respectively. Mineral element contents were 14.1-45.6 g K kg^{-1}, 0.2-1.2 g Ca kg^{-1} , 0.4-1.9 g Mg kg^{-1}, and 0.2-0.9 g Na kg^{-1} as macronutrients, and 176.5-838.0 mg Fe kg^{-1}, 35.0-46.0 mg Zn kg^{-1}, 4.8-65.4 mg Mn kg^{-1}, 6.5-21.5 mg Cu kg^{-1}, 0.0-11.5 mg Cr kg^{-1}, and 0.0-1.65 mg Cd kg^{-1} as micronutrients …
Maternal Donors Of Polyploids In Pseudoroegneria (Poaceae: Triticeae) And Related Genera Inferred From Chloroplast Trnl-F Sequences, Yu Hai-Qing, Zhang Chun, Ding Chun-Bang, Ma Xiao, Zhou Yong-Hong
Maternal Donors Of Polyploids In Pseudoroegneria (Poaceae: Triticeae) And Related Genera Inferred From Chloroplast Trnl-F Sequences, Yu Hai-Qing, Zhang Chun, Ding Chun-Bang, Ma Xiao, Zhou Yong-Hong
Turkish Journal of Biology
To investigate the maternal donors and phylogenetic relationships of polyploids in Pseudoroegneria and related genera, the chloroplast trnL-F sequences of 31 Triticeae accessions were analyzed. The substitution saturation analysis of trnL-F sequences in this study suggested that they are suitable for phylogenetic analysis. In the trnL-F sequences tree, 4 major clades were formed: (a) the St/E clade comprised all of the Pseudoroegneria species together with species in Roegneria, Elytrigia, Douglasdeweya and Lophopyrum; (b) A. cristatum, A. mongolicum, and A. pectinatum subsp. retrofractum formed the P/W clade; (c) the Ns clade included species in Psathyrostachys; and (d) the H clade consisted …
The Effects Of The Pho85 Signaling Pathway On The Invertase Biosynthesis And Glucose Uptake In Saccharomyces Cerevisiae, Sezai̇ Türkel, Eli̇f Arik
The Effects Of The Pho85 Signaling Pathway On The Invertase Biosynthesis And Glucose Uptake In Saccharomyces Cerevisiae, Sezai̇ Türkel, Eli̇f Arik
Turkish Journal of Biology
Glucose signaling controls a wide range of metabolic events in the yeast Saccharomyces cerevisiae. Glucose sensing and signaling processes require a variety of membrane-bound and cytoplasmic sensor proteins. Pho85p is a cyclin-dependent protein kinase that controls different metabolic events upon binding to its cyclin partners in the cytoplasm of yeast cells. In this study, we investigated the roles of Pho85p in the glucose signaling pathways that control invertase biosynthesis and glucose uptake in yeast. The biosynthesis of invertase enzyme from the SUC2 gene is controlled by glucose repression and derepression mechanisms in S. cerevisiae. However, the results of this research …
Indole-3-Acetic Acid And Gibberellic Acid Production In Aspergillus Niger, Işil Seyi̇s Bi̇lkay, Şafak Karakoç, Ni̇lüfer Aksöz
Indole-3-Acetic Acid And Gibberellic Acid Production In Aspergillus Niger, Işil Seyi̇s Bi̇lkay, Şafak Karakoç, Ni̇lüfer Aksöz
Turkish Journal of Biology
The effects of incubation time, temperature, pH, and agitation on indole-3- acetic acid and gibberellic acid production in Aspergillus niger were studied. For indole-3-acetic acid production, 6 days of incubation at 25 °C and pH 6.0 was found to be optimum. Optimum conditions for gibberellic acid production were 12 days of incubation at 30 °C and pH 5.0. Agitation increased both indole-3-acetic acid and gibberellic acid production.
Aphrodisiac Activity And Curative Effects Of Pedalium Murex (L) Against Ethanol Induced Infertility In Male Rats, Gunasekaran Balamurugan, P. Muralidharan, Satyanarayana Polapala
Aphrodisiac Activity And Curative Effects Of Pedalium Murex (L) Against Ethanol Induced Infertility In Male Rats, Gunasekaran Balamurugan, P. Muralidharan, Satyanarayana Polapala
Turkish Journal of Biology
It has been suggested that chronic ethanol exposure may result in testicular damage and infertility in males. Petroleum ether extract of Pedalium murex, family Pedaliaceae (PEPM), is evaluated in this study for its ability to increase aphrodisiac activity and to cure ethanol induced germ cell damage and infertility in male rat models. Doses of 200 and 400 mg/kg of PEPM showed a significant increase (P < 0.01, P < 0.001) in mating and mounting behaviour. The effect on fertility factors such as total body weight, percentage of pregnancy, litter size were also significantly increased (P < 0.01) in comparison with the ethanol-treated group. Significant increases in sperm motility and count were observed in PEPM-treated groups in a dose-dependent manner (P < 0.01; P < 0.001) as compared with the ethanol-treated group. Similarly, reductions in the percentage of abnormal sperm were noted in animals treated with PEPM 400 mg/kg. The effects of PEPM on total protein, total cholesterol and testosterone were satisfactory, the levels being increased significantly for protein (P < 0.05), cholesterol (P < 0.01) and testosterone (P < 0.05) by 400 mg/kg PEPM. Microtome sections of the testes of animals treated with 400 mg/kg PEPM exhibited restoration and recovery of germinal cells and the luminal spermatozoa and were comparable with the control group animals. These effects of PEPM make this natural herb ideal as an aphrodisiac and a potent fertility enhancing drug.
Phytoplankton Composition And Environmental Conditions Of The Mucilage Event In The Sea Of Marmara, Vi̇ldan Tüfekçi̇, Nesli̇han Balkis, Çolpan Polat Beken, Di̇lek Edi̇ger, Mustafa Mantikçi
Phytoplankton Composition And Environmental Conditions Of The Mucilage Event In The Sea Of Marmara, Vi̇ldan Tüfekçi̇, Nesli̇han Balkis, Çolpan Polat Beken, Di̇lek Edi̇ger, Mustafa Mantikçi
Turkish Journal of Biology
The composition and abundance of phytoplankton and the corresponding environmental conditions were investigated during a mucilage event (October 2007-February 2008) in the Sea of Marmara. The mucilage producers Gonyaulax fragilis, Skeletonema costatum, and Cylindrotheca closterium were identified as abundant species. Thallassiosira rotula was also identified in large numbers. The maximum number of G. fragilis was observed at 83,600 cells L^{-1} in November 2007 during the first sampling occasion on the surface layer of İzmit Bay, and T. rotula was the most abundant diatom species, with 131,040 cells L^{-1} in the same period. G. fragilis was recorded at 96,250 cells L^{-1} …
The Genotoxic And Antigenotoxic Effects Of Aloe Vera Leaf Extract In Vivo And In Vitro, Ahmet Kayraldiz, Ayşe Yavuz Kocaman, Eyyüp Rencüzoğullari, Erman Sali̇h İsti̇fli̇, Hasan Basri̇ İla, Mehmet Topaktaş, Yusuf Kenan Dağlioğlu
The Genotoxic And Antigenotoxic Effects Of Aloe Vera Leaf Extract In Vivo And In Vitro, Ahmet Kayraldiz, Ayşe Yavuz Kocaman, Eyyüp Rencüzoğullari, Erman Sali̇h İsti̇fli̇, Hasan Basri̇ İla, Mehmet Topaktaş, Yusuf Kenan Dağlioğlu
Turkish Journal of Biology
The genotoxic and antigenotoxic effects of Aloe vera leaf extract (AV) were investigated using the chromosome aberrations (CAs) test for the bone marrow cells of rats, sister chromatid exchanges (SCEs) and micronucleus (MN) and CAs tests for human lymphocytes, and the Ames Salmonella/microsome test system. In the bone marrow cells of rats, AV extract significantly induced structural and total CAs at all concentrations and in all treatment periods. In human peripheral lymphocytes, AV did not increase the mean SCE; however, it significantly induced the MN frequency and structural CAs. In addition, AV showed a cytotoxic effect by decreasing the replication …
Molecular Characterization Of Rhizoctonia Solani Ag4 Using Pcr-Rflp Of The Rdna-Its Region, Meli̇ke Çebi̇ Kiliçoğlu, İbrahi̇m Özkoç
Molecular Characterization Of Rhizoctonia Solani Ag4 Using Pcr-Rflp Of The Rdna-Its Region, Meli̇ke Çebi̇ Kiliçoğlu, İbrahi̇m Özkoç
Turkish Journal of Biology
Rhizoctonia solani isolates obtained from common beans (Phaseolus vulgaris L.) were included in an AG4 anastomosis group in accordance with hyphal anastomosis. In the subgrouping of AG4 isolates, PCR-RFLP patterns in the rDNA-ITS were used. After obtaining the genomic DNA belonging to R. solani AG4, an approximately 700 bp amplification product of the ITS1-5.8S-ITS2 region was obtained with PCR, using ITS1 and ITS4 universal primers. The PCR products were digested with MseI, HincII, AvaII, and MfeI restriction endonucleases, and different PCR-RFLP patterns were obtained for the AG4 HGI and AG4 HGII subgroups. In this study, in addition to the enzymes …
Molecular Fingerprinting Of Some Clinically Significant Nocardia And Related Strains By Restriction Polymorphism Ribosomal Rna Analyses, Kami̇l Işik, Michael Goodfellow
Molecular Fingerprinting Of Some Clinically Significant Nocardia And Related Strains By Restriction Polymorphism Ribosomal Rna Analyses, Kami̇l Işik, Michael Goodfellow
Turkish Journal of Biology
Fifty-three Nocardia strains were the subject of a restriction polymorphic ribosomal RNA analysis (ribotyping) designed to distinguish between representatives of clinically significant species and related strains. The organisms were assigned to 19 groups using a combination of EcoRV gene restriction endonuclease patterns and a digoxigenin-labelled Streptomyces violaceoruber TK21 rDNA probe. Each ribotype group contained 4 to 13 restriction fragments that ranged in size from 20.7 to 0.9 kb. The N. brasiliensis, N. crassostreae, N. farcinica, N. otitidiscaviarum, and N. seriolea strains showed distinct ribotype patterns. Unique banding patterns were also seen for the type strains of N. brevicatena, N. carnea, …
The Effect Of 4-Chloroindole-3-Acetic Acid On Some Growth Parameters In Mung Bean Under Cadmium Stress, Mohammad Mazid, Barket Ali, Shamsul Hayat, Aqil Ahmad
The Effect Of 4-Chloroindole-3-Acetic Acid On Some Growth Parameters In Mung Bean Under Cadmium Stress, Mohammad Mazid, Barket Ali, Shamsul Hayat, Aqil Ahmad
Turkish Journal of Biology
Seedlings of mung bean (Vigna radiata L. Wilczek) cv. T-44 grown on a sand culture were exposed to cadmium (Cd) (100 µM) on day 10 of growth. These seedlings were subsequently sprayed with deionized water (control) or 4-chloroindole-3-acetic acid (4-Cl-IAA) (10^{-6} M) on day 15 and were sampled 30 days after sowing to assess growth and metabolite content. Growth (length, and fresh and dry mass of roots and shoots) and the level of metabolites (chlorophyll, nitrogen, phosphorus, total sugar, and soluble protein) in the leaves significantly decrease in response to Cd stress; however, the 4-Cl-IAA (10^{-6} M) treatment, both in …
Genetic Relationships Of The Genera Onobrychis, Hedysarum, And Sartoria Using Seed Storage Proteins, Emi̇ne Arslan, Kuddi̇si̇ Ertuğrul
Genetic Relationships Of The Genera Onobrychis, Hedysarum, And Sartoria Using Seed Storage Proteins, Emi̇ne Arslan, Kuddi̇si̇ Ertuğrul
Turkish Journal of Biology
Fifteen species belonging to 3 genera (Onobrychis, Hedysarum and Sartoria), collected from different geographical regions of Turkey were studied for the polypeptide patterns of their seed storage proteins. The variability of seed storage proteins was analysed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). As many as 72 bands were scored and a dendrogram was constructed using UPGMA (unweighted pair group method with arithmetic mean). The dendrogram of the electrophoretic protein profiles of seeds showed 2 main clusters. While the first cluster with further subclusters included Onobrychis species, the second cluster included Sartoria and Hedysarum species present in 2 separate subclusters. …
Germination Characteristics And Molecular Characterizations Of Some Wheat Varieties In Sulaimanyah By Ssr Marker, Nawroz Abdul-Razzak Tahir
Germination Characteristics And Molecular Characterizations Of Some Wheat Varieties In Sulaimanyah By Ssr Marker, Nawroz Abdul-Razzak Tahir
Turkish Journal of Biology
The genetic diversity of 11 bread and durum wheat varieties was estimated using germination characteristic and molecular analysis. The phenotypic data showed highly significant differences between cultivars for germination speed, germination percentage, seedling length, fresh weight, and dry weight. Simple sequence repeats (SSRs) were used to examine the genomic diversity of wheat (Triticum aestivum L. and Triticum durum L.). Eleven wheat varieties of diverse origins were analyzed with 12 selected SSRs to provide uniform and maximum genome coverage. A total of 18 bread wheat and 20 durum wheat polymorphic allelic variants were detected, ranging from 1 to 4 per locus …
A Study On The Morphology Of Argulus Foliaceus Lin., 1758 (Crustacea; Branchiura) Procured From Çavuşcu Lake (Central Anatolia-Turkey) With Scanning Electron Microscopy, Ali̇ Alaş, Ahmet Öktener, Kemal Solak
A Study On The Morphology Of Argulus Foliaceus Lin., 1758 (Crustacea; Branchiura) Procured From Çavuşcu Lake (Central Anatolia-Turkey) With Scanning Electron Microscopy, Ali̇ Alaş, Ahmet Öktener, Kemal Solak
Turkish Journal of Biology
In this study, 24 carps (Cyprinus carpio Lin.,1758) caught from Çavuşçu Lake (Konya; 36°41´N, 34°26´E) were examined for metazoan parasites. Infestation rate of Argulus foliaceus Lin.,1758 was found to be 45.8%. In addition, Argulus foliaceus was photographed using a scanning electron microscope (SEM) and a light microscope.
The Effect Of Activator Application On The Anatomy, Morphology, And Viability Of Lycopersicon Esculentum Mill. Pollen, İlkay Öztürk Çali, Feyza Candan
The Effect Of Activator Application On The Anatomy, Morphology, And Viability Of Lycopersicon Esculentum Mill. Pollen, İlkay Öztürk Çali, Feyza Candan
Turkish Journal of Biology
The present study examined the effect of ACT-2, a K-vitamin group activator intensively applied to tomato (Lycopersicon esculentum Mill.), on the anatomy, morphology, and viability of tomato pollen from plants grown under greenhouse conditions. The activator was applied to tomatoes at the recommended dosage (150 cc/100 L of tap water) and double the recommended dosage (300 cc/100 L of tap water). Pollen width and length, exine and intine layer thickness, pore width and length, and crevice width and length were measured using an ocular micrometer. Reductions were observed in all the measured parameters in all application groups, except for pollen …
Cadmium-Induced Antioxidant Status And Sister-Chromatid Exchanges In Vicia Faba L., Serpi̇l Ünyayar, Ayşi̇n Güzel Değer, Ayla Çeli̇k, Fazi̇let Özlem Çeki̇ç, Sertan Çevi̇k
Cadmium-Induced Antioxidant Status And Sister-Chromatid Exchanges In Vicia Faba L., Serpi̇l Ünyayar, Ayşi̇n Güzel Değer, Ayla Çeli̇k, Fazi̇let Özlem Çeki̇ç, Sertan Çevi̇k
Turkish Journal of Biology
The effects of cadmium (Cd) on antioxidant responses and sister chromatid exchanges (SCE) were studied in Vicia faba L. The activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR), and the levels of ascorbate (ASC), glutathione (GSH), hydrogen peroxide, and malondialdehyde (MDA, indicator of lipid peroxidation) were measured. Genotoxicity was evaluated by measuring the changes in the mitotic index (MI) and sister chromatid exchanges (SCE). Increased activities of SOD and CAT were observed in plants treated with 50 and 100 µM Cd. It was found that APX activity increased remarkably with 50 µM Cd, but …
Siderophore, Hemolytic, Protease, And Pyrazinamidase Activities And Antibiotic Resistance In Motile Aeromonas Isolated From Fish, Belgi̇n Erdem, Ergi̇n Kari̇ptaş, Tayfun Kaya
Siderophore, Hemolytic, Protease, And Pyrazinamidase Activities And Antibiotic Resistance In Motile Aeromonas Isolated From Fish, Belgi̇n Erdem, Ergi̇n Kari̇ptaş, Tayfun Kaya
Turkish Journal of Biology
A total of 120 fresh water fish samples were evaluated for the presence of Aeromonas spp. A. hydrophila, A. caviae, and A. veronii bv. sobria were isolated from the gills, intestines, livers, and skins of fish, and 78 isolated Aeromonas spp. strains were further examined for siderophore, hemolytic, protease, and pyrazinamidase activities and antibiotic resistance. Siderophore production was demonstrated in almost all of the A. hydrophila and A. caviae strains except for 2 strains of A. veronii bv. sobria. The strains identified as A. hydrophila and A. veronii bv. sobria were the stronger producers of hemolysin, whereas the A. caviae …
Biocontrol Of Fusarium Wilt By Bacillus Pumilus, Pseudomonas Alcaligenes And Rhizobium Sp. On Lentil, Mohd Sayeed Akhtar, Uzma Shakeel, Zaki A. Siddiqui
Biocontrol Of Fusarium Wilt By Bacillus Pumilus, Pseudomonas Alcaligenes And Rhizobium Sp. On Lentil, Mohd Sayeed Akhtar, Uzma Shakeel, Zaki A. Siddiqui
Turkish Journal of Biology
The present study examined the effects of Bacillus pumilus, Pseudomonas alcaligenes, and Rhizobium sp. on wilt disease caused by Fusarium oxysporum f. sp. lentis and on the growth of lentil. Inoculation with F. oxysporum caused significant wilting, and reduced plant growth, the number of pods, and nodulation. Inoculation with B. pumilus together with P. alcaligenes caused a greater increase in plant growth, number of pods, nodulation, and root colonization by rhizobacteria, and also reduced Fusarium wilting to a greater degree than did individual inoculation. Use of Rhizobium sp. resulted in a greater increase in plant growth, number of pods, and …
In Vitro Genotoxic Effects Of Benzoyl Peroxide In Human Peripheral Lymphocytes, Arzu Yavuz, Mehmet Topaktaş, Erman Sali̇h İsti̇fli̇
In Vitro Genotoxic Effects Of Benzoyl Peroxide In Human Peripheral Lymphocytes, Arzu Yavuz, Mehmet Topaktaş, Erman Sali̇h İsti̇fli̇
Turkish Journal of Biology
The aim of the present research was to investigate the genotoxic potency of benzoyl peroxide (BPO), a whitener of flour and cheese, using in vitro sister chromatid exchange (SCE), chromosome aberration (CA), and micronucleus (MN) tests in human peripheral lymphocytes. Cells were exposed to 25, 50, 75, and 100 µg/mL concentrations of BPO for 24 and 48 h. BPO induced SCEs only at the highest concentration (100 µg/mL) for 48 h treatment. Furthermore, BPO induced CAs at 75 and 100 µg/mL concentrations for 24 h treatment, and at all concentrations for 48 h treatment. BPO induced CAs in a dose-dependent …
Production Of (S)-2'-Fluorophenylethan-1-Ol And (S)-3'- Fluorophenylethan-1-Ol By Alternaria Alternata Using Ram Horn Peptone In Microbial Growth Medium, Esabi̇ Başaran Kurbanoğlu, Namudar İzzet Kurbanoğlu, Kani̇ Zi̇lbeyaz
Production Of (S)-2'-Fluorophenylethan-1-Ol And (S)-3'- Fluorophenylethan-1-Ol By Alternaria Alternata Using Ram Horn Peptone In Microbial Growth Medium, Esabi̇ Başaran Kurbanoğlu, Namudar İzzet Kurbanoğlu, Kani̇ Zi̇lbeyaz
Turkish Journal of Biology
Enantiomerically pure, fluorinated compounds have an important role in medicinal chemistry. Alternaria alternata isolates were used for the synthesis of (S)-2^'-fluorophenylethan-1-ol 1b and (S)-3^'-fluorophenylethan-1-ol 2b. Biocatalytic syntheses of optically active 1b and 2b were achieved by asymmetric reduction of 2^'-fluoroacetophenone 1a and 3^'-fluoroacetophenone 2a in the batch culture of A. alternata containing ram horn peptone (RHP). The reaction conditions (pH, temperature, and agitation) that improve the conversion of the substrates were studied. The optimal reaction conditions were found as pH 6.0, agitation 250, temperature 32 °C and substrate 3 mmol/100 mL. The gram scale productions of 1b and 2b by …
The Effect Of Ascorbic Acid And H_2o_2 Treatment On The Stability Of Anthocyanin Pigments In Berries, Elham Nikkhah, Masoud Khaiamy, Reza Heidary, Ali Sorayaie Azar
The Effect Of Ascorbic Acid And H_2o_2 Treatment On The Stability Of Anthocyanin Pigments In Berries, Elham Nikkhah, Masoud Khaiamy, Reza Heidary, Ali Sorayaie Azar
Turkish Journal of Biology
Anthocyanins are natural pigments widely distributed in nature. Anthocyanin pigment molecules are a subclass of flavonoids. They are responsible for the red, purple, and blue colors observed in many flowers, fruits, and vegetables. Fruits and berries are the main sources of anthocyanins in nature. Anthocyanins are thought to contribute to the nutritive value of fruits and berries due to their antioxidative, anti-carcinogenic, anti-inflammatory, and anti-angiogenic properties. Anthocyanins can also improve the nutritional value of processed foods by preventing the oxidation of lipids and proteins. As such, identification of agents that can affect the stability of anthocyanins and the protective effect …
Characterization Of Essential Oils Of Some Salvia Species And Their Antimycobacterial Activities, Tüli̇n Aşkun, K. Hüsnü Can Başer, Gülendam Tümen, Mi̇ne Kürkçüoğlu
Characterization Of Essential Oils Of Some Salvia Species And Their Antimycobacterial Activities, Tüli̇n Aşkun, K. Hüsnü Can Başer, Gülendam Tümen, Mi̇ne Kürkçüoğlu
Turkish Journal of Biology
The compositions of the essential oils of 5 Turkish Salvia species, namely Salvia aucheri Bentham var. aucheri (endemic for Turkey), Salvia aramiensis Rech. fil., Salvia fruticosa Mill., Salvia tomentosa Mill., and Salvia verticillata L. subsp. amasiaca (Freyn & Bornm.) Bornm., were studied. Water distilled essential oils from the aerial parts of Salvia species from Turkey were analysed by GC and GC/MS. Salvia aucheri var. aucheri, Salvia aramiensis, and Salvia fruticosa oils have the same main constituent: 1,8-cineole (39.2%, 55.6%, and 52.8% respectively). \alpha-Pinene (25.1%), camphor (14.9%), and borneol (13.2%) were identified as the major components of Salvia tomentosa. The main …
Effects Of Chromium Vi Stress On Green Alga Ulva Lactuca (L.), Di̇lek Ünal, Nuray O. Işik, Atakan Sukatar
Effects Of Chromium Vi Stress On Green Alga Ulva Lactuca (L.), Di̇lek Ünal, Nuray O. Işik, Atakan Sukatar
Turkish Journal of Biology
In order to contribute to the understanding of its response to metal stress, Ulva lactuca (L.) was treated with different concentration of chromium (VI) (0.2, 0.5, 1, and 5 mM K2CrO4), and alterations in Fv/Fm ratio (maximal photochemical efficiency of PSII) and cell viability were investigated. Significant alterations of the maximal photochemical efficiency of PSII (Fv/Fm) ratio were observed in response to the increase in chromium concentration. The Fv/Fm ratio decreased in Ulva lactuca following 2 h treatment with 1 and 5 mM Cr(VI) solution. The cell viability was decreased in cells exposed to higher Cr(VI) concentrations. Thallus cell morphology …
Determination Of The Relationship Between Some Centaurea Species Based On Sds-Page, Tuna Uysal, Emi̇ne Arslan, Osman Tugay, Kuddi̇si̇ Ertuğrul
Determination Of The Relationship Between Some Centaurea Species Based On Sds-Page, Tuna Uysal, Emi̇ne Arslan, Osman Tugay, Kuddi̇si̇ Ertuğrul
Turkish Journal of Biology
The protein patterns of 47 Centaurea species from Turkey were obtained using SDS-PAGE methods. Relationships between Centaurea species and related genera were evaluated via use of a dendrogram. SDS-PAGE provided protein profiles for an important and applicable selection within Centaurea, particularly for the section Cheirolepis and its relatives. We determined that the technique could be used to resolve taxonomic and evolutionary problems in the genus Centaurea, as most of the Centaurea species studied exhibited special protein profiles and patterns.
Studies On The Shelf Life Of Bread Using Acidulants And Their Salts, Omer Mukhtar Tarar, Salim Ur-Rahman, Ghulam Mueen Ud Din, Mian Anjum Murtaza
Studies On The Shelf Life Of Bread Using Acidulants And Their Salts, Omer Mukhtar Tarar, Salim Ur-Rahman, Ghulam Mueen Ud Din, Mian Anjum Murtaza
Turkish Journal of Biology
White bread loaves prepared from wheat flour and the addition of different levels of acidulants, i.e. acetic and lactic acid with calcium propionate, were evaluated for their microbial shelf life as well as sensory quality characteristics during 96 h of storage. Among the sensory characteristics for the different treatments, volume of bread, color of crust, symmetry of form, crust characteristics, grain, and crumb color differed significantly, and the scores were 6.5-7.4, 5.8-6.8, 2.9-3.4, 2.7-3.1, 10.6-11.8, and 6.8-7.4, respectively, whereas evenness of bake, aroma, taste, and texture were not significantly different. Storage for 96 h affected the aroma, taste, texture, and …
Antioxidant And Antibacterial Activities Of Ranunculus Marginatus Var. Trachycarpus And R. Sprunerianus, Gülen İrem Kaya, Nehi̇r Ünver Somer, Si̇bel Konyalioğlu, H. Tansel Yalçin, N. Ülkü Karabay Yavaşoğlu, Buket Sarikaya, Mustafa Ali̇ Onur
Antioxidant And Antibacterial Activities Of Ranunculus Marginatus Var. Trachycarpus And R. Sprunerianus, Gülen İrem Kaya, Nehi̇r Ünver Somer, Si̇bel Konyalioğlu, H. Tansel Yalçin, N. Ülkü Karabay Yavaşoğlu, Buket Sarikaya, Mustafa Ali̇ Onur
Turkish Journal of Biology
Hexane, ethyl acetate, methanol, and aqueous extracts of Ranunculus marginatus d'Urv. var. trachycarpus (Fisch. & Mey.) Azn. and R. sprunerianus Boiss. were tested in vitro for their antioxidant and antibacterial activities. Antioxidant activity of the extracts was determined by DPPH radical scavenging and Trolox equivalent antioxidant capacity assays. Methanol extracts showed the highest antioxidant activity in both assays. The total phenolics in the extracts were determined colorimetrically by using the Folin-Ciocalteau reagent. The total flavonoid content of the extracts was evaluated by a spectrophotometric method. The results obtained in the antioxidant activity tests were in positive correlation with the total …
Antioxidant And Antiradical Activities Of Phenolic Extracts From Iranian Almond (Prunus Amygdalus L.) Hulls And Shells, Ali Jahanban Isfahlan, Ahmad Mahmoodzadeh, Abdollah Hasanzadeh, Reza Heidari, Rashid Jamei
Antioxidant And Antiradical Activities Of Phenolic Extracts From Iranian Almond (Prunus Amygdalus L.) Hulls And Shells, Ali Jahanban Isfahlan, Ahmad Mahmoodzadeh, Abdollah Hasanzadeh, Reza Heidari, Rashid Jamei
Turkish Journal of Biology
Wild almonds of Iran show genetic diversity and have very a large distribution. Different species of these almonds have more variation in genes resistant to dryness, saltiness, diseases, pests, and other factors. In order to compare the antioxidant and antiradical activity of wild almond hull and shell phenolic extracts, 4 wild almond species (Amygdalus lycioides Spach, A. kotschyi Boiss. & Hohen, A. pabotti Browicz, A. trichamygdalus (Hand.-Mzt) Woronow) were selected from Shahindezh and Qasemloo Valley, West Azerbaijan province, Iran, in 2007. The fruits of these almonds were collected, their hulls and shells were dried and then ground, and then methanolic …
Antioxidant And Antimicrobial Activities Of An Aquatic Plant: Duckweed (Lemna Minor L.), İlhami̇ Gülçi̇n, Ekrem Ki̇reçci̇, Ebru Akkemi̇k, Fevzi̇ Topal, Olcay Hi̇sar
Antioxidant And Antimicrobial Activities Of An Aquatic Plant: Duckweed (Lemna Minor L.), İlhami̇ Gülçi̇n, Ekrem Ki̇reçci̇, Ebru Akkemi̇k, Fevzi̇ Topal, Olcay Hi̇sar
Turkish Journal of Biology
Duckweed (Lemna minor L. Lemnaceae) is a widespread, free-floating aquatic macrophyte, a source of food for waterfowl and a shelter for small aquatic invertebrates. It grows quickly and reproduces faster than other vascular plants. The objective of this study was to determine the antioxidant, antiradical, antimicrobial, and anticandidal activities of duckweed using different in vitro methodologies. For evaluation of antioxidant and antiradical activities, 2,2´-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS.+) radical scavenging, 1,1-diphenyl-2-picryl-hydrazyl (DPPH.) free radical scavenging, total antioxidant activity by ferric thiocyanate, total reducing power by potassium ferricyanide reduction method, superoxide anion radical scavenging, hydrogen peroxide scavenging, and ferrous ions chelating activities were …
Diurnal Variations Of Summer Phytoplankton And Interactions With Some Physicochemical Characteristics Under Eutrophication In The Dardanelles, Muhammet Türkoğlu, Yasemi̇n Erdoğan
Diurnal Variations Of Summer Phytoplankton And Interactions With Some Physicochemical Characteristics Under Eutrophication In The Dardanelles, Muhammet Türkoğlu, Yasemi̇n Erdoğan
Turkish Journal of Biology
This study was carried out to determine the diurnal distributions of phytoplankton density, bio-volume, and chlorophyll a in relation to nutrients and CTD measurements in surface waters of the coastal area in the Dardanelles during high density of phytoplankton, especially high diatom production (between 3 July and 4 August 2002). Ninety nine surface samples were collected for nutrient, chlorophyll a, and phytoplankton in 3 different time periods of the day (08:00, 13:00 and 18:00 hours) in the sampling period. Based on the sample analyses, average temperature, salinity, pH, DO, TDS, TSS, NO-2+NO-3, PO-34, SiO4, chlorophyll a, N:P, and Si:P were …