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Full-Text Articles in Entire DC Network
Accumulation Of Heavy Metals In Freshwater Organisms: Assessment Of Toxic Interactions, Neylan Di̇ri̇lgen
Accumulation Of Heavy Metals In Freshwater Organisms: Assessment Of Toxic Interactions, Neylan Di̇ri̇lgen
Turkish Journal of Chemistry
Heavy metals are continuously released into the terrestrial environment by natural sources and human activities. The uptake and accumulation of heavy metals by plants promotes a mechanistic understanding of the biological significance of particular metal concentrations and distributions in biota. The toxicity of chromium, zinc, copper and cobalt ions and their binary mixtures are studied at varying test levels using duckweed as the test organism. The accumulation of metal ions are determined by atomic absorption spectroscopy. The type of toxic interactions in binary mixtures is assessed as `synergistic', `antagonistic' and `additive' by a statistical approach.
The Composition Of Essential Oils From Two Varieties Of Sideritis Erythrantha Var. Erythrantha And Var. Cedretorum, Nurhayat Tabanca, Neş'E Kirimer, K. Hüsnü Can Başer
The Composition Of Essential Oils From Two Varieties Of Sideritis Erythrantha Var. Erythrantha And Var. Cedretorum, Nurhayat Tabanca, Neş'E Kirimer, K. Hüsnü Can Başer
Turkish Journal of Chemistry
Water distilled essential oils from two varieties of Sideritis erythrantha: var. erythrantha} and var. cedretorum, both endemic in Turkey, were analysed by GC/MS. The main components were characterized as \alpha -pinene (16.3-19.5%) and sabinene (6.1- 10.4%) for var. erythrantha; myrcene (21.9-24.3%) and \alpha -pinene (11.4- 12.4%) for var. cedretorum.
Incorporation Of Edta For The Elimination Of Metal Inhibitory Effects In An Amperometric Biosensor Based On Mushroom Tissue Polyphenol Oxidase, Arzum Erdem, Di̇lşat Özkan, Burcu Meri̇ç, Kağan Kerman, Mehmet Özsöz
Incorporation Of Edta For The Elimination Of Metal Inhibitory Effects In An Amperometric Biosensor Based On Mushroom Tissue Polyphenol Oxidase, Arzum Erdem, Di̇lşat Özkan, Burcu Meri̇ç, Kağan Kerman, Mehmet Özsöz
Turkish Journal of Chemistry
Enzyme based biosensors are highly selective devices which rely on the specific binding of the target analyte (the substrate) to the active-site regions of the enzyme. The enzymatic reaction between mushroom tissue polyphenol oxidase and its substrate phenol is coupled with the use of potassium ferrocyanide (K_{4}Fe(CN)_{6}) as the mediator in ammonia buffer solution (pH 8.80). The response of devices is often affected by the presence of inhibitors, which combine with the free enzyme in a manner that prevents substrate binding. The objective of this study is to describe an efficient and yet simple strategy to eliminate the interference of …
Calculation Of Multi-Center Integrals For The Region Of Moderate And Weak Overlap, Abdulhali̇k Karabulut, Gökhan Budak, Lütfü Demi̇r, Nagi̇f Sefteroğlu Nabi̇yev, Yusuf Şahi̇n
Calculation Of Multi-Center Integrals For The Region Of Moderate And Weak Overlap, Abdulhali̇k Karabulut, Gökhan Budak, Lütfü Demi̇r, Nagi̇f Sefteroğlu Nabi̇yev, Yusuf Şahi̇n
Turkish Journal of Chemistry
In this study a general formula was established for multi-center integrals over Gaussian basis sets using the two-center expansion of nuclear attraction and electron repulsion potentials. The terms of the formula are the analytical functions of interatomic distances. Three kinds of integrals contained in these formulae can be evaluated analytically. In the presented method, unlike many other popular methods, the numerical integrations procedure is unnecessary since it does not contain the incomplete gamma function. A computer program was written and tested for various orbitals. The calculations show that the series converge very rapidly.
The Influence Of Transition Metal Ions On The Kinetics Of Ascorbic Acid Oxidation By Methylene Blue In Strongly Acidic Media, M. Nasiruddin Khan, Anila Sarwar
The Influence Of Transition Metal Ions On The Kinetics Of Ascorbic Acid Oxidation By Methylene Blue In Strongly Acidic Media, M. Nasiruddin Khan, Anila Sarwar
Turkish Journal of Chemistry
The kinetics of the oxidation of L-ascorbic acid (H_{2} A) by methylene blue was investigated in strongly acidic media over the temperature range 22-40 ^oC. The kinetic studies were carried out as a function of different variables like concentration, pH, ionic strength and temperature. The rate was found to be a linear relation with [H_{2} A], [M.B.] and [H^{+}]. Ionic strength dependence formation indicated complex formation by monocationic and anionic species in solution. The reaction rate was greatly catalyzed by the presence of trace amounts of copper (II) ion. Possible mechanisms for the catalyzed and uncatalyzed reactions are proposed. Kinetic …
Molecular Genetics Of Breast Cancer, Emel Ergül, Ali̇ Sazci
Molecular Genetics Of Breast Cancer, Emel Ergül, Ali̇ Sazci
Turkish Journal of Medical Sciences
Recent advances in molecular biology enable researchers to understand the basis of breast cancer much better and show that hereditery breast cancer may result from mutations on several specific gene loci including BRCA1, BRCA2, p53, ATM and PTEN. These genes are tumor supressor genes and although their functions are different, they are all involved in the maintenance of genomic stability after DNA damage. Mutations that impair the function of these genes may adversely affect the manner in which DNA damage is processed. It is likely that the risk of breast cancer development is increased through this mechanism. Moreover, there are …
The Low Above-Zero Temperature Effect In The Zone Of Roots On Nitrate Reductase Activity In Pea Organs In The Process Of Vegetating, G. G. Vasilieva, N. V. Mironova, A. K. Glyanko
The Low Above-Zero Temperature Effect In The Zone Of Roots On Nitrate Reductase Activity In Pea Organs In The Process Of Vegetating, G. G. Vasilieva, N. V. Mironova, A. K. Glyanko
Turkish Journal of Botany
Experiments with pea (Pisum sativum L.) cv. Marat) in a phytotron chamber showed that the process of nitrate assimilation in pea organs depends on temperature in the zone of the roots and on the phase of development of the plants. The potential of tissues of different organs for nitrate reduction was compared to the amount of nitrates which they accumalated. A decrease in nitrate reductase activity during certain phases of development is assumed to be related to the process of formation and functioning of nodules.
A Father Born To Consanguineous Parents Had Double Translocation 21;22 [44,Xy, T(21q;22q), T(21q;22q)] Due To Familial Translocation In Four Generations, Cumhur Gündüz, Ferda Özkinay, Özgür Çoğulu, Gül Sapmaz, Tufan Çankaya, Ci̇hangi̇r Özkinay
A Father Born To Consanguineous Parents Had Double Translocation 21;22 [44,Xy, T(21q;22q), T(21q;22q)] Due To Familial Translocation In Four Generations, Cumhur Gündüz, Ferda Özkinay, Özgür Çoğulu, Gül Sapmaz, Tufan Çankaya, Ci̇hangi̇r Özkinay
Turkish Journal of Medical Sciences
No abstract provided.
Comparative Histological Analysis Of Hepatitis C Virus With Hepatitis B, Gülen Akyol, Özlem Süer, Cem Sezer
Comparative Histological Analysis Of Hepatitis C Virus With Hepatitis B, Gülen Akyol, Özlem Süer, Cem Sezer
Turkish Journal of Medical Sciences
Aims: Rates of certain histopathologic features were evaluated in hepatitis C and in hepatitis B materials and analyzed statistically in a Turkish population. Method: The presence of lymphoid aggregate, steatosis, ductal lesions, sinusoidal inflammation and portal iron deposition were investigated in 80 hepatitis C and 104 hepatitis B specimens and evaluated using the chi-square test and Fisher's exact test. Pan Band T cell markers were used for lymphoid aggregate analysis. P53 and PCNA were applied for the possible impact of steatosis on cell biology. Results: All mentioned parameters excluding sinusoidal inflammation were found to be higher in hepatitis C samples. …
A Case Of Bisatellited-Isodicentric Supernumerary Chromosome 15, Y. Selma Süngü, Bi̇rsen Karaman, E. Ferda Perçi̇n, Sevi̇m Balci, İlhan Sezgi̇n
A Case Of Bisatellited-Isodicentric Supernumerary Chromosome 15, Y. Selma Süngü, Bi̇rsen Karaman, E. Ferda Perçi̇n, Sevi̇m Balci, İlhan Sezgi̇n
Turkish Journal of Medical Sciences
SÜNGÜ^1 Birsen KARAMAN^2 E. Ferda PERÇİN^1 Sevim BALCI^3 İlhan SEZGİN^1 ^1Department of Medical Biology and Genetics, Faculty of Medicine, Cumhuriyet University 58140-Sivas, ^2Department of Medical Genetics, Faculty of Medicine, Istanbul University, Çapa -Istanbul, ^3Department of Pediatrics, Faculty of Medicine, Hacettepe University Ankara - TURKEY
The Liverwort Flora Of Antarctica (2000), Adnan Erdağ
The Liverwort Flora Of Antarctica (2000), Adnan Erdağ
Turkish Journal of Botany
No abstract provided.
Synthesis And Spectrophotometric Investigation Of A New Vic-Dioxime Ligand And Its Transition Metal Complexes, Mustafa Dolaz, Mehmet Tümer, Ayşegül Gölcü, Selahatti̇n Seri̇n
Synthesis And Spectrophotometric Investigation Of A New Vic-Dioxime Ligand And Its Transition Metal Complexes, Mustafa Dolaz, Mehmet Tümer, Ayşegül Gölcü, Selahatti̇n Seri̇n
Turkish Journal of Chemistry
A new vic-dioxime ligand and its Cu(II), Co(II), Ni(II), Pd(II), VO(IV) and Zn(II) complexes have been prepared and characterized by elemental analyses, infrared, electronic spectra, magnetic moment and molar conductance data. The Ni(II), Pd(II) and Zn(II) complexes have a diamagnetic character. The ^{1}H- and ^{13}C-nmr and GC/MS spectra of the vic-dioxime ligand and its Ni(II), Pd(II) and Zn(II) complexes were recorded. In addition, all compounds are non-electrolyte.
Restriction Fragment Length Polymorphism Analysis (Rflp) Of Some Streptomyces Strains From Soil, Ekrem Atalan
Restriction Fragment Length Polymorphism Analysis (Rflp) Of Some Streptomyces Strains From Soil, Ekrem Atalan
Turkish Journal of Biology
To separate the unknown Streptomyces strains isolated from soil samples, the interspacer regions of 16S-23S rDNA of 14 isolates were amplified with PCR (polymerase chain reaction) and digested with three restriction endonucleases, namely, Bsp143I, HaeIII and MnlI. The restriction patterns were used for RFLP (restriction fragment length polymorphism) analysis. A dendrogram were constructed using the unweighed pair group method using arithmetic averages algorithm (UPGMA) after analysis restriction patterns. Five RFLP groups were obtained anone test strain was left as a single member group. RFLP profile indicated that unknown strains could be identified with data based on the interspacer region of …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
In Vitro Capacitation And Fertilization Of Bull Spermatozoa, Necmetti̇n Teki̇n, Ali̇ Daşkin, Ergun Akçay
In Vitro Capacitation And Fertilization Of Bull Spermatozoa, Necmetti̇n Teki̇n, Ali̇ Daşkin, Ergun Akçay
Turkish Journal of Veterinary & Animal Sciences
In this study, the fertilizing ability of in vitro capacitated bull spermatozoa in two different capacitation media (Hypotaurine and Follicular Fluid) was investigated. Ovaries were obtained from slaughterhouse and were transported to the laboratory in saline (0.9% NaCl) at 30-35ºC. Cumulus oocyte complexes were collected from antral follicles of 2 to 8 mm in diameter. After collected oocytes were classified, they were transferred to maturation medium. Oocytes were cultured for 24 hours in a 100 ml drops of maturation media overlaid with mineral oil under 5% CO_2, 95% humidity in air at 38.5ºC. At the end of this incubation, oocytes …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Synthesis And Characterization Of Copper(Ii), Nickel(Ii), Cadmium(Ii), Cobalt(Ii) And Zinc(Ii) Complexes With 2-Benzoyl-3-Hydroxy-1-Naphthylamino-3-Phenyl-2-Propen-1-On, Mehmet Sönmez
Turkish Journal of Chemistry
Cu(II), Ni(II), Co(II), Zn(II) and Cd(II) complexes of 2-Benzoyl-3-hydroxy-1-naphthylamino-3-phenyl-2-propen-1-on, which is a derivative of carboxamide, were prepared and characterized by elemental, spectral and magnetic methods. Based on the analytical results, electronic and infrared spectral data and magnetic susceptibility measurements, suitable structures have been proposed. The formation of the complexes in solution was investigated conductometrically. 2-Benzoyl-3-hydroxy-1-naphthylamino-3-phenyl-2-propen-1-on was found to be a bidentate ligand coordinating through enolic oxygen and amide nitrogen. The complexes of Co(II) and Ni(II) are proposed to have an octahedral structure, while Cd(II), Cu(II) and Zn(II) are suggested to possess a square-planar environment in the complexes.
Evaluation Of Sample Pre-Treatment Procedures For The Determination Of Cr, Ni And V In Biological Matrices By Etaas, Jan Medved, Jana Kubova, Eva Chmielewska, Vladimir Stresko
Evaluation Of Sample Pre-Treatment Procedures For The Determination Of Cr, Ni And V In Biological Matrices By Etaas, Jan Medved, Jana Kubova, Eva Chmielewska, Vladimir Stresko
Turkish Journal of Chemistry
Electrothermal atomic absorption spectrometry (ETAAS) was applied for the determination of chromium, nickel and vanadium in biological materials (earthworms, feather, lucerne). Three different decomposition procedures of biological matrices are presented. The utilization of NH_4H_2PO_4, Mg(NO_3)_2 and Pd(NO_3)_2+ Mg(NO_3)_2 as chemical modifiers are investigated and compared. Optimal temperature conditions for the electrothermal determination of Cr, Ni and V are selected. Precision of the determination expressed as relative standard deviations for Cr, Ni and V varied from 6 to 22% . The detection limits are for Cr 8 \\mu g kg^{ - 1}, Ni 12 \\mu g kg^{ - 1}, and V …
Cellular Adhesion And Adhesion Molecules, Zerri̇n Seller
Cellular Adhesion And Adhesion Molecules, Zerri̇n Seller
Turkish Journal of Biology
In recent years, cell adhesion and cell adhesion molecules have been shown to be important for many normal biological processes, including embryonic cell migration, immune system functions and wound healing. It has also been shown that they contribute to the pathogenesis of a large number of common human disorders, such as rheumatoid arthritis and tumor cell metastasis in cancer. In this review, the basic mechanisms of cellular adhesion and the structural and functional features of adhesion molecules are summarized.
In Vitro Model For The Study Of Listeria And Salmonella Adherence To Intestinal Epithelial Cells, Nevzat Yurdusev
In Vitro Model For The Study Of Listeria And Salmonella Adherence To Intestinal Epithelial Cells, Nevzat Yurdusev
Turkish Journal of Biology
A quantitative test to study Listeria and Salmonella adherence to epithelial cells was developed. The quantitative test is rapid and allows the simultaneous testing of many variables such as the adherence ability of different bacteria to their target cells as well as the capability of various molecules to inhibit bacterial adherence. By using a strain-specific standard curve in each test, the test for the quantification of adherent bacteria became specifically sensitive. Non-viable biotinylated bacteria and immobilized cells or their extract were found relevant for the study of bacteria-epithelial cell interactions. Adherence ability of Listeria strains was found to be 10-fold …