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Bulunan: 487 Adet 0.001 sn
Koleksiyon [20]
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Design and testing of wall cabinet frames constructed with round mortise-and-tenon joints

Tankut, Ali N. | Tankut, Nurgul | Eckelman, Carl A.

Article | 2007 | FOREST PRODUCTS JOURNAL57 ( 3 ) , pp.18 - 22

This study investigated the design, construction, testing, and performance characteristics of wall cabinets constructed with round mortise-and-tenon joints that are suitable for use in classrooms, school libraries, and homes. Four wall cabinets, utilizing round mortise-and-tenon joints, were constructed to evaluate their performance. Tests indicated that the attachment of thin plywood panels to the frames increased overall cabinet stiffness by 62 and 70 percent for red oak and yellow-poplar wall cabinets, respectively. Also, wood species was found to affect creep deflection. Overall, this study clearly demonstrated that wall cabinet . . .s constructed with round mortise-and-tenon joints were able to withstand normal service loads without loss of structural integrity or function Daha fazlası Daha az

Adaptive neuro-fuzzy modelling of anaerobic digestion of primary sedimentation sludge

Cakmakci M.

Article | 2007 | Bioprocess and Biosystems Engineering30 ( 5 ) , pp.349 - 357

Modelling of anaerobic digestion systems is difficult because their performance is complex and varies significantly with influent characteristics and operational conditions. In this study, Adaptive Neuro-Fuzzy Inference System (ANFIS) were used for modelling of anaerobic digestion system of primary sludge of Kayseri municipal WasteWater Treatment Plant (WWTP). Effluent Volatile Solid (VS) and methane yield were predicted by the ANFIS. Two stage models were performed. In the first stage, effluent VS concentration was predicted using pH, VS concentration, flowrate of pre-thickened sludge and temperature of the influent as input parame . . .ters. In the second stage, effluent VS concentration in addition to first stage input parameters were used as input parameters to predict methane yield. The low Root Mean Square Error (RMSE) and high Index of agreement (IA) values were obtained with subtractive clustering method of a first order Sugeno type inference. The model performance was evaluated with statistical parameters. According to statistical evaluations, the models satisfactorily predict effluent VS concentration and methane yield. © 2007 Springer-Verlag Daha fazlası Daha az

Synthesis and antimicrobial activity of some novel furyl and benzimidazole substituted benzyl ethers

Güven Ö.Ö. | Erdogan T. | Göker H. | Yildiz S.

Article | 2007 | Journal of Heterocyclic Chemistry44 ( 3 ) , pp.731 - 734

(Chemical Equation Presented) In this study, a series of novel furyl and benzimidazole substituted benzyl ethers were synthesized and evaluated for antibacterial and antifungal activities against S. aureus, Methicillin resistant S. aureus (MRSA), E. coli, C. albicans and C. krusei. Compound 6f and 6h exhibited the most potent anti-bacterial activity with lowest MIC values of 3.12 µg/mL against S aureus and MRSA, respectively.

Tartismali olgu

Mungan A. | Müezzinoglu T.

Article | 2007 | Turk Uroloji Dergisi33 ( 4 ) , pp.435 - 437

[No abstract available]

Genetics: Honey bees (Hymenoptera: Apidae) of African origin exist in non-Africanized areas of the southern United States: Evidence form mitochondrial DNA

Pinto M.A. | Sheppard W.S. | Johnston J.S. | Rubink W.L. | Coulson R.N. | Schiff N.M. | Kandemir I.

Article | 2007 | Annals of the Entomological Society of America100 ( 2 ) , pp.289 - 295

Descendents of Apis mellifera scutellata Lepeletier (Hymenoptera: Apidae) (the Africanized honey bee) arrived in the United States in 1990. Whether this was the first introduction is uncertain. A survey of feral honey bees from non-Africanized areas of the southern United States revealed three colonies (from Georgia, Texas, and New Mexico) with a diagnostic African mitochondrial DNA cytochrome b/Bg/II fragment pattern. To assess maternal origin of these colonies, we developed a primer pair for amplification of a cytochrome b fragment and sequenced using internal sequencing primers. Samples of the three reported honey bee colonies pl . . .us another 42 representing the 10 subspecies known to have been introduced in the United States were sequenced. Of the three colonies, the colonies from Texas and New Mexico matched subspecies of European maternal ancestry, whereas the colony from Georgia was of African ancestry. Contrary to expectations, the mitotype of the latter colony was more similar to that exhibited by sub-Saharan A. m. scutellata than to the mitotypes common in north African A. m. intermissa Maa or Portuguese and Spanish A. m. iberiensis Engel. This finding was consistent with anecdotal evidence that A. m. scutellata has been sporadically introduced into the United States before the arrival of the Africanized honey bee from South America. © 2007 Entomological Society of America Daha fazlası Daha az

A multi-center blinded study on the efficiency of phenotypic screening methods to detect glycopeptide intermediately susceptible Staphylococcus aureus (GISA) and heterogeneous GISA (h-GISA)

Voss A. | Mouton J.W. | van Elzakker E.P. | Hendrix R.G. | Goessens W. | Kluytmans J.A. | Krabbe P.F.

Article | 2007 | Annals of Clinical Microbiology and Antimicrobials6 , pp.289 - 295

Backgrounds: To determine the true incidence of hGISA/GISA and its consequent clinical impact, methods must be defined that will reliably and reproducibly discriminate these resistant phenotypes from vancomycin susceptible S. aureus (VSSA). Methods: This study assessed and compared the ability of eight Dutch laboratories under blinded conditions to discriminate VSSA from hGISA/ GISA phenotypes and the intra- and inter-laboratory reproducibility of agar screening plates and the Etest method. A total of 25 blinded and unique strains (10 VSSA, 9 hGISA and 6 GISA) were categorized by the PAP-AUC method and PFGE typed to eliminate clonal . . . duplication. All strains were deliberately added in quadruplets to evaluate intra-laboratory variability and reproducibility of the methods. Strains were tested using three agar screening methods, Brain Heart Infusion agar (BHI) + 6 µg/ml vancomycin, Mueller Hinton agar (MH) + 5 µg/ ml vancomycin and MH + 5 µg/ml teicoplanin) and the Etest macromethod using a 2 McFarland inoculum. Results and Discussion: The ability to detect the hGISA/GISA phenotypes varied significantly between methods and phenotypes. BHI vancomycin and MH vancomycin agar screens lacked the ability to detect hGISA. The MH teicoplanin agar screen was more sensitive but still inferior to Etest that had a sensitivity of 98.5% and 99.5%, for hGISA and GISA, respectively. Intra- and inter-laboratory reproducibility varied between methods with poorest performance seen with BHI vancomycin. Conclusion: This is the first multi-center blinded study to be undertaken evaluating various methods to detect GISA and hGISA. These data showed that the ability of clinical laboratories to detect GISA and hGISA varied considerably, and that screening plates with vancomycin have a poor performance in detecting hGISA. © 2007 Voss et al; licensee BioMed Central Ltd Daha fazlası Daha az

Examination of tribological behaviours of aged Cu-Be alloys

Yildiz H.B. | Yaşar M.

Article | 2007 | Metallofizika i Noveishie Tekhnologii29 ( 12 ) , pp.1659 - 1672

In this examination, characteristics of wear of Cu-Be alloys are studied after application of thermal treatment of ageing to Cu-Be alloys. Cu-Be alloys were taken into solution at 820°C before process of ageing and allowed for 30 min at this temperature. After fast cooling, they were aged at 400-450-500-550°C for 120 min. Characteristics of a microstructure of Cu-Be alloys were determined according to analysis by a scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) of these alloys, which have undergone to thermal treatment of ageing, but not to process of ageing. Cu-Be alloys aged at various temperatur . . .es were then corroded using pin-on-disc wear device, and thereby their characteristics of wear were examined. In wear tests, four different loads including 20-30-40-50 N and four different distances of slip including 250-500-1000-2000 m were used. As a result of such tests, it has been determined that the wear resistance of Cu-Be alloys has decreased rapidly with increase of wearing force. It was also observed that wearing losses were increased linearly depending on a distance. Worn quantities of the materials subjected to treatment of ageing especially at temperatures above 450°C were increased rapidly during ageing Daha fazlası Daha az

Modeling of ni-like molybdenum x-ray laser

Kurnali S. | Demir A. | Kacar E.

Conference Object | 2007 | Springer Series in Optical Sciences132 , pp.187 - 191

Detailed simulations of Ni-like Mo X-ray laser are undertaken using the EHYBRID code. The atomic data are obtained using the Cowan code. The optimization calculations are performed in terms of intensity of background and time separation between the background and the short pulse. The optimum value is obtained for the conditions of a Nd:glass laser with 1.2 ps pulse at 3.5 × 1014 W • cm-2 irradiance pumping a plasma preformed by a 280-ps duration pulse at 1.2 × 1012 W • cm-2 with peak to peak pulse separation set at 360 ps. X-ray resonance lines between 25 Å and 37 Å emitted from Mo plasmas have been simulated. © 2007 Springer-Verlag . . . New York Daha fazlası Daha az

Influence of soil compaction on microfungal community structure in two soil types in Bart in Province, Turkey

Kara Ö. | Bolat I.

Article | 2007 | Journal of Basic Microbiology47 ( 5 ) , pp.394 - 399

Soil compaction negatively influences physical properties of soil (bulk density and pore space), and may consequently limit soil microfungi, which are significant for nutrient bioavailability. We measured microfungal community responses to compaction in a sandy loam and a clay loam soil at picnic sites. Soil bulk density increased significantly in the compacted samples. However, microfungal numbers and community composition were unrelated to changes in soil bulk density. With increases in bulk density from 1.22 to 1.37 g cm-3 in the clay soil and from 1.38 to 1.54 g cm-3 in the sandy loam soil, the total number of fungi declined or . . .showed insignificant increases. In the compacted samples as well as the control sites, the most frequently occurring genera in the clay soil were Penicillium, Aspergillus, and Gliocladium. However, the most prominent feature occurring within the sandy loam soil was the exhibition of the greatest increase in the frequency of the Fusarium genus. When comparing compacted and control soils, fungal community composition corresponded more closely within each soil texture. The two microfungal soil communities, therefore, tolerated compaction. In contrast, a difference occurred in the fungal communities between the two soil textures. This is more likely due to the variability in the controlling factors of microfungal abundance and composition, such as soil characteristics, tree species, and competitive ability of fungal genera. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA Daha fazlası Daha az

Lower limb compartment syndrome after an uncomplicated labor

Bayar A. | Keser S. | Hosnuter M. | Tanriverdi H.A. | Ege A.

Article | 2007 | Orthopedics30 ( 11 ) , pp.972 - 973

[No abstract available]

Hippophae rhamnoides L.: Fruit and seed morphology and its taxonomic problems in Turkey

Aras A. | Akkemik Ü. | Kaya Z.

Article | 2007 | Pakistan Journal of Botany39 ( 6 ) , pp.1907 - 1916

Hippophae rhamnoides, which comprises of 9 subspecies, has an extremely wide distribution but fragmentally in Eurasia. H.rhamnoides L. subsp. caucasica is the only known species growing in Turkey. In this paper, morphological traits of seed and fruit considered as diagnostic characters of H.rhamnoides L. subsp. caucasica in Turkey (Sivas, Trabzon, Ilgaz, Ürgüp) were analyzed in order to show whether there is taxonomical problems and try to reconstruct the relationship among the taxon of different regions, to test whether there is a significant association between the morphological characters measured and its environ. Photographs, fr . . .uit and seed dimension (length and width) and shape are recorded, using performed ANOVA, Duncan test, UPGMA cluster analysis, climatic diagrams. UPGMA cluster analysis showed that subsp. caucasica samples of Trabzon-Ilgaz regions form a branch and Sivas 94-Ürgüp another branch, while Sivas 96 samples form a complete different group. Climatic diagrams for study areas revealed that the differences, variations in the fruit and seed characters were not significantly correlated with ecological conditions. All results of this study imply that another taxon or taxa of H. rhamnoides is likely present in Turkey and also the specimens of these different regions can be differentiated on the basis of these features Daha fazlası Daha az

Honey bees (Hymenoptera : Apidae) of African origin exist in non-Africanized areas of the Southern United States: Evidence from mitochondrial DNA

Pinto, M. A. | Sheppard, W. S. | Johnston, J. S. | Rubink, W. L. | Coulson, R. N. | Schiff, N. M. | Kandemir, I.

Article | 2007 | ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA100 ( 2 ) , pp.289 - 295

Descendents of Apis mellifera scutellata Lepeletier (Hymenoptera: Apidae) (the Africanized honey bee) arrived in the United States in 1990. Whether this was the first introduction is uncertain. A survey of feral honey bees from non-Africanized areas of the southern United States revealed three colonies (from Georgia, Texas, and New Mexico) with a diagnostic African mitochondrial DNA cytochrome blBgllI fragment pattern. To assess maternal origin of these colonies, we developed a primer pair for amplification of a cytochrome b fragment and sequenced using internal sequencing primers. Samples of the three reported honey bee colonies pl . . .us another 42 representing the 10 subspecies known to have been introduced in the United States were sequenced. Of the three colonies, the colonies from Texas and New Mexico matched subspecies of European maternal ancestry, whereas the colony from Georgia was of African ancestry. Contrary to expectations, the mitotype of the latter colony was more similar to that exhibited by sub-Sabaran A. m. scutellata than to the mitotypes common in north African A. m. intennissa Maa or Portuguese and Spanish A. m. iberiensis Engel. This finding was consistent with anecdotal evidence that A. m. scutellata has been sporadically introduced into the United States before the arrival of the Africanized honey bee from South America Daha fazlası Daha az

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