Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

TÜBİTAK

Discipline
Keyword
Publication Year
Publication

Articles 17821 - 17850 of 18793

Full-Text Articles in Entire DC Network

Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Zoology

No abstract provided.


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Zoology

No abstract provided.


The Effect Of Calosoma Sycophanta L. (Coleoptera: Carabidae) Feeding On The Pine Processionary Moth, Thaumetopoea Pityocampa (Denis & Schiffermüller) (Lepidoptera: Thaumetopoeidae), In The Laboratory, Mehmet Kanat, Torul Mol Jan 2008

The Effect Of Calosoma Sycophanta L. (Coleoptera: Carabidae) Feeding On The Pine Processionary Moth, Thaumetopoea Pityocampa (Denis & Schiffermüller) (Lepidoptera: Thaumetopoeidae), In The Laboratory, Mehmet Kanat, Torul Mol

Turkish Journal of Zoology

We determined the feeding capacity of Calosoma sycophanta L. (Coleoptera: Carabidae) by feeding them the pine processionary moth (PPM), Thaumetopoea pityocampa (Denis & Schiffermüller) (Lepidoptera: Thaumetopoeidae), under laboratory conditions. C. sycophanta is one of the most important predators of PPM larvae and pupae. Adult C. sycophanta can consume as much as 7-8 times their weight in food per day. On average, each C. sycophanta adult injured 10 PPM larvae while consuming 7 of these prey per day. The adults lived for 3-4 years. When young C. sycophanta larvae feed on 1 PPM larva, they can reach 1.4-1.6 cm in length …


A Study Of The Turkish Cryptini Iv. (Cryptinae: Ichneumonidae: Hymenoptera), Mehmet Faruk Gürbüz, Janko Kolarov Jan 2008

A Study Of The Turkish Cryptini Iv. (Cryptinae: Ichneumonidae: Hymenoptera), Mehmet Faruk Gürbüz, Janko Kolarov

Turkish Journal of Zoology

Faunistic data of 39 species belonging to the tribe Cryptini from Cryptinae subfamily were studied. All species were collected from Isparta and surrounding districts between 2001 and 2004. General distribution of each species was given. Among them, 9 species noted in the text by asterisk are new records for the Turkish fauna.


Lead (Pb) And Copper (Cu) Concentration In The Eggshells Of Audouin´S Gull (Larus Audouinii) In Turkey, Zafer Ayaş, Hüseyi̇n Çeli̇kkan, Mehmet Levent Aksu Jan 2008

Lead (Pb) And Copper (Cu) Concentration In The Eggshells Of Audouin´S Gull (Larus Audouinii) In Turkey, Zafer Ayaş, Hüseyi̇n Çeli̇kkan, Mehmet Levent Aksu

Turkish Journal of Zoology

Audouin´s gull (Larus audouinii) eggshells from 2 archipelagos (Karaburun-İzmir and Aydıncık-Mersin) in Turkey were collected between 2002 and 2003, and analyzed for lead (Pb) and copper (Cu) content. According to the results, mean Cu level of the eggshells was 1.855 ppm for the Aydıncık colony and 10.202 ppm for the Karaburun colony. Mean Pb level of the eggshells was 0.954 ppm for the Aydıncık colony and 4.601 ppm for the Karaburun colony. The detected metal levels did not seem to have any toxic effects on the Audouin´s gull populations. It is suggested that eggshells from abandoned nests of Audouin´s gulls …


Effects Of A Neem Sample On Protein Patterns Of Bactrocera Cucurbitae, Nikhat Yasmin, Mohammad Farhanullah Khan, Muhammad Samiullah Channa, Zeeshan Ali Jan 2008

Effects Of A Neem Sample On Protein Patterns Of Bactrocera Cucurbitae, Nikhat Yasmin, Mohammad Farhanullah Khan, Muhammad Samiullah Channa, Zeeshan Ali

Turkish Journal of Zoology

Bactrocera cucurbitae (Coquillett) adults were reared with 5% honey solution, sugar, and protein-hydrolysate. Females were provided to lay eggs on larval rearing media in a bottle gourd. Twenty third-instar larvae of the same size and age were exposed to filter papers treated with varying doses of a neem sample in 90 mm diameter petri dishes for 24 h. A probit-mortality curve was drawn to determine the LC_{50} of the sample. LC_{50} dose of the sample was calculated as 5.6%. Thin layer chromatography was used to determine the effects of neem sample on the protein patterns of the treated insect. The …


Hibernation Pattern And Importance Of Superoxide Dismutase For The Turkish Hamster, Mesocricetus Brandti (Mammalia: Rodentia), Nuri̇ Yi̇ği̇t, Di̇dem Erten, Nursel Gül Jan 2008

Hibernation Pattern And Importance Of Superoxide Dismutase For The Turkish Hamster, Mesocricetus Brandti (Mammalia: Rodentia), Nuri̇ Yi̇ği̇t, Di̇dem Erten, Nursel Gül

Turkish Journal of Zoology

Specimens of Mesocricetus brandti were observed in order to assess the onset of hibernation and the inhibition rate of superoxide dismutase (SOD). The first individual began to hibernate on November 2 and the last animal awoke on May 5. Individual hibernation bouts varied from 8 to 63 days, and the longest uninterrupted hibernation was 4 days. In the hibernation period, the animals lost an average of 27.1 g, ranging from 2.7% to 38% of total body weight. In hibernating animals, the average inhibition rate of SOD was 82.3% while it was 77.5% in active animals. The inhibition rate of SOD …


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Physics

No abstract provided.


Critical State Models For Intergrain Junctions Of Polycrystalline Superconductors By Third Harmonic Ac Susceptibility Measurements, Ioseb R. Metskhvarishvili Jan 2008

Critical State Models For Intergrain Junctions Of Polycrystalline Superconductors By Third Harmonic Ac Susceptibility Measurements, Ioseb R. Metskhvarishvili

Turkish Journal of Physics

High harmonic response of high-T_c and Chevrel-phase polycrystalline superconductors are measured in the presence of small ac excitation field and dc magnetic field applied on it. The aim of this work is to study the Josephson weak link behavior and compare the two systems in order to understand the granular nature of polycrystalline superconductors. Critical state models are used to explain the nonlinear magnetic response in polycrystalline superconductors.


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Physics

No abstract provided.


Ac Conductivity And Ultrasonic Studies In Khco_3 Compound, Fathy Salman, Sayed Abouelhassan, Eslam Sheha, Mabrouk Elmansy Jan 2008

Ac Conductivity And Ultrasonic Studies In Khco_3 Compound, Fathy Salman, Sayed Abouelhassan, Eslam Sheha, Mabrouk Elmansy

Turkish Journal of Physics

The total conductivity of KHCO_3 compound is studied in the frequency range 50 Hz-1 MHz and in the temperature range 300-370 K. The conductivity frequency dependence relation is divided into three regions: one at low frequency (dc conductivity), while the others appear at a moderate and relatively higher frequency range. In general, the conductivity frequency dependence conductivity obeys a double power law relation, \sigma_{tot} = \sigma_{dc} + A\omega^p + B\omega^q. The powers p and q have been found to be in the range 0 to 1 and 1 to 2, respectively. The attenuation coefficient \beta of KHCO_3 compound was studied …


Heat Capacity Anomalies Of Tlins_2 And Tlgas_2 Single Crystals Detected By Differential Scanning Calorimetry (Dsc), Muhammed Açikgöz Jan 2008

Heat Capacity Anomalies Of Tlins_2 And Tlgas_2 Single Crystals Detected By Differential Scanning Calorimetry (Dsc), Muhammed Açikgöz

Turkish Journal of Physics

Specific heat capacity C_p anomalies of layered single crystals TlInS_2 and TlGaS_2 have been investigated using differential scanning calorimetry (DSC) as a new technique for such crystals. Special features of C_p have been revealed in the temperature range of the possible phase transitions of both crystals. A sequence of maximum values of C_p is obtained at 163, 174, 184, 193, 201, 212, 224, 254, and 259 K for TlInS_2. In the case of TlGaS_2, the temperatures of the obtained maximum C_p values at 177 and 241 K agree well with the intervals of the phase transition temperatures reported in the …


Characterization Of Thin Film Al/P-Cdte Schottky Diode, M. G. Mahesha, V. B. Kasturi, G. K. Shivakumar Jan 2008

Characterization Of Thin Film Al/P-Cdte Schottky Diode, M. G. Mahesha, V. B. Kasturi, G. K. Shivakumar

Turkish Journal of Physics

A study has been made on the behavior of Al/p-CdTe thin film junction grown by thermal evaporation method. I-V characteristics show that the Al makes Schottky contact with p-CdTe. The variation of junction capacitance with frequency and voltage has been studied to evaluate the barrier height. The activation energy and band gap have been estimated by studying variation of resistivity with temperature. Using all these data, band diagram of Al/p-CdTe has been proposed.


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Biology

No abstract provided.


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.


Feeding And Foraging Behaviour In Two Coccinellid Predators: Scymnus Levaillanti Muls. And Cycloneda Sanguinea L., Ali̇ Arda Işikber Jan 2008

Feeding And Foraging Behaviour In Two Coccinellid Predators: Scymnus Levaillanti Muls. And Cycloneda Sanguinea L., Ali̇ Arda Işikber

Turkish Journal of Agriculture and Forestry

Predatory behaviour, prey consumption, and foraging cycle of adults and larvae of Scymnus levaillanti Muls. and Cycloneda sanguinea L. (Coleoptera: Coccinellidae) were investigated using a video/computer recording and measurement system. Larvae of S. levaillanti spent more time in feeding activities compared to C. sanguinea. Adults of both S. levaillanti and C. sanguinea spent more time in non-feeding activities (digestion and cleaning) compared to their larvae whilst adults of S. levaillanti spent less time in non-feeding activities than those of C. sanguinea. Generally, larvae and adults of both coccinellid species spent most of their time in non-feeding activities. Although S. levaillanti …


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.


Genetic Analysis Of Grain Yield And Starch Content In Nine Maize Populations, Zvonimir Zdunic, Anto Mijic, Krunoslav Dugalic, Domagoj Simic, Josip Brkic, Ana Marjanovic Jeromela Jan 2008

Genetic Analysis Of Grain Yield And Starch Content In Nine Maize Populations, Zvonimir Zdunic, Anto Mijic, Krunoslav Dugalic, Domagoj Simic, Josip Brkic, Ana Marjanovic Jeromela

Turkish Journal of Agriculture and Forestry

The objective of this study was to estimate main genetic effects including digenic non-allelic epistasis for yield and starch content in grain by generation mean analysis performed in 9 maize populations (biparental crosses) and their subsequent 6 generations (2 parental, F1 and F2, and 2 backcrosses). The estimated additive-dominance model of inheritance was, due to epistasis, only partially successful in explaining inheritance model for investigated traits and crosses. The additive-dominance model was adequate at 6 crosses for grain yield and 3 crosses for starch content. A digenic epistatic model was sufficient to explain the inheritance model at 6 crosses for …


Cover And Contents Jan 2008

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.


Ergodicity Conditions In A Simple Best Effort Queueing Networks, Abdeldjebbar Kandouci, Abdelmadjid Ezzine, Toufik Guendouzi Jan 2007

Ergodicity Conditions In A Simple Best Effort Queueing Networks, Abdeldjebbar Kandouci, Abdelmadjid Ezzine, Toufik Guendouzi

Turkish Journal of Mathematics

No abstract provided.


Multipliers And The Relative Completion In L_W^P(G), Cenap Duyar, A. Turan Gürkanli Jan 2007

Multipliers And The Relative Completion In L_W^P(G), Cenap Duyar, A. Turan Gürkanli

Turkish Journal of Mathematics

Quek and Yap defined a relative completion à for a linear subspace A of L^p(G), 1 \leq p < \infty ; and proved that there is an isometric isomorphism, between Hom_{L^1(G)}(L^1(G), A) and Ã, where Hom_{L^1(G)}(L^1(G),A) is the space of the module homomorphisms (or multipliers) from L^1(G) to A. In the present, we defined a relative completion à for a linear subspace A of L_w^p(G) ,where w is a Beurling's weighted function and L_w^p(G) is the weighted L^p(G) space, ([14]). Also, we proved that there is an algeabric isomorphism and homeomorphism, between Hom_{L_w^1(G)} (L_w^1(G),A) and Ã. At the end of this work we gave some applications and examples.


On The Normalizer Of The Congruence Subgroup H_0^5(I) Of The Hecke Group H^5, Süleyman Uzun Jan 2007

On The Normalizer Of The Congruence Subgroup H_0^5(I) Of The Hecke Group H^5, Süleyman Uzun

Turkish Journal of Mathematics

Let l = 2 cos \frac{\pi}{5} and let H^5 be the Hecke group associated to l. In this paper, the normalizers of the congruence subgroups H_0^5(I) in PSL(2Z[\lambda]) are studied in the case where I = (2)^aI ', (2, I') = 1 and I' is a prime ideal.


Rayleigh Number In A Stability Problem For A Micropolar Fluid, Ioana Florica Dragomirescu Jan 2007

Rayleigh Number In A Stability Problem For A Micropolar Fluid, Ioana Florica Dragomirescu

Turkish Journal of Mathematics

Approximate numerical evaluations of the Rayleigh number are obtained for a stability problem of thermal convection in a heat-conducting micropolar fluid layer between two rigid boundaries [7]. The influences of all the physical parameters on the values of the Rayleigh number are studied. Also, approximate neutral curves and neutral surfaces are represented in various parameters spaces.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Chemistry

No abstract provided.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Physics

No abstract provided.


A Combinatorial Approach Of Real Ga & Fuzzy To Atc Enhancement, Hossein Farahmand, Masoud Rashidinejad, Ali Akbar Gharaveici Jan 2007

A Combinatorial Approach Of Real Ga & Fuzzy To Atc Enhancement, Hossein Farahmand, Masoud Rashidinejad, Ali Akbar Gharaveici

Turkish Journal of Electrical Engineering and Computer Sciences

Under new de-regulated environment an open access to transmission system seems to be desired. Transmission system operators (TSOs) are encouraged to use the existing facilities more efficiently. This paper focuses on study of the best location for SVC as a FACTS device to improve voltage profile as well as maximum available transfer capacity (ATC) in order to achieve lower prices. Real genetic algorithm (RGA) is used for optimization technique and analytical hierarchy process (AHP) associated with fuzzy sets to obtain priority vector for each alternative to evaluate the GA fitness. The effectiveness of the proposed methodology is shown through case …


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.


Cover And Contents Jan 2007

Cover And Contents

Turkish Journal of Earth Sciences

No abstract provided.