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2001

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Articles 2401 - 2430 of 2476

Full-Text Articles in Life Sciences

Identification Of The Domains Of Urer, An Arac-Like Transcriptional Regulator Of The Urease Gene Cluster In Proteus Mirabilis, Carrie A. Poore, Christopher Coker, Jonathan D. Dattelbaum, Harry L.T. Mobley Jan 2001

Identification Of The Domains Of Urer, An Arac-Like Transcriptional Regulator Of The Urease Gene Cluster In Proteus Mirabilis, Carrie A. Poore, Christopher Coker, Jonathan D. Dattelbaum, Harry L.T. Mobley

Chemistry Faculty Publications

Proteus mirabilis urease catalyzes the hydrolysis of urea to CO2 and NH3, resulting in urinary stone formation in individuals with complicated urinary tract infections. UreR, a member of the AraC family, activates transcription of the genes encoding urease enzyme subunits and accessory proteins, ureDABCEFG, as well as its own transcription in the presence of urea. Based on sequence homology with AraC, we hypothesized that UreR contains both a dimerization domain and a DNA-binding domain. A translational fusion of the leucine zipper dimerization domain (amino acids 302 to 350) of C/EBP and the C-terminal half of UreR …

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Productivity Estimation In Halodule Wrightii: Comparison Of Leaf-Clipping And Leaf-Marking Techniques, And The Importance Of Clip Height, Joseph L. Kowalski, Hudson R. Deyoe, Terry C. Allison, James E. Kaldy Jan 2001

Productivity Estimation In Halodule Wrightii: Comparison Of Leaf-Clipping And Leaf-Marking Techniques, And The Importance Of Clip Height, Joseph L. Kowalski, Hudson R. Deyoe, Terry C. Allison, James E. Kaldy

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

We compared estimates of Halodule wrightii leaf growth rates obtained from leaf-clipping and leaf-piercing methods in a south Texas lagoon. Leaf clipping underestimated leaf production from 15 to 37% in winter and 25 to 60% in summer relative to leaf piercing. The underestimation of leaf-clipping derived growth rates were corrected using a linear regression between leaf growth rates determined by leaf-clipping and leaf-piercing methods. To examine the effect of clip height on H. wrightii leaf growth rate estimation, leaves were clipped at 0, 2, 4, 6, and 8 cm above the sediment. Leaves clipped at 2 cm exhibited the fastest …

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Volume Management In San Environment, Chang-Soo Kim, Gyoung-Bae Kim, Bum-Joo Shin Jan 2001

Volume Management In San Environment, Chang-Soo Kim, Gyoung-Bae Kim, Bum-Joo Shin

Electrical and Computer Engineering Faculty Research & Creative Works

Logical volume managers have long been key components of a storage system. Their key features are creation of logical or virtual views of physical storage devices and support for various software RAID levels. These make it possible to overcome the limits to capacity, availability and performance of a physical storage device. Most logical volume managers are operated in a single system environment. They are not adequate for SAN (storage area network) environments where several hosts share and access a logical volume at the same time. Some recent logical volume managers are run in a multi-host environment. However, they cannot support …

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Response Of Popcorn (Zea Mays Everta) To Nitrogen Rates And Plant Densities, Sabri̇ Gökmen, Özer Sencar, Mehmet Ali̇ Saki̇n Jan 2001

Response Of Popcorn (Zea Mays Everta) To Nitrogen Rates And Plant Densities, Sabri̇ Gökmen, Özer Sencar, Mehmet Ali̇ Saki̇n

Turkish Journal of Agriculture and Forestry

The objective of this study was to evaluate grain yield and yield components of popcorn with different nitrogen rates and plant densities. Field studies were conducted in 1995 and 1996 at Kazova Plain in Tokat. The experiment was designed in a randomized-complete-block design with a split-plot arrangement with three replications. The treatments comprised six levels of nitrogen (0, 50, 100, 150, 200 and 250 kg N /ha) and four plant densities (5.7, 7.0, 9.5 and 14.0 plants /m^2). Nitrogen rates were in the main plots, and planting densities were in the sub-plots. An open pollinated was used as the material …

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The Effect Of Salicyclic Acid And Endomycorrhizal Fungus Glomus Etunicatumon Plant Development Of Tomatoes And Fusarium Wilt Caused By Fusarium Oxysporum F.Sp Lycopersici, Hülya Özgönen, Mehmet Bi̇çi̇ci̇, Ali̇ Erkiliç Jan 2001

The Effect Of Salicyclic Acid And Endomycorrhizal Fungus Glomus Etunicatumon Plant Development Of Tomatoes And Fusarium Wilt Caused By Fusarium Oxysporum F.Sp Lycopersici, Hülya Özgönen, Mehmet Bi̇çi̇ci̇, Ali̇ Erkiliç

Turkish Journal of Agriculture and Forestry

The effect of salicylic acid (SA)and Glomus etunicatum (GE)on plant development of tomatoes and infection potential of wilt disease Fusarium oxysporum f.sp lycopersici (Fol)were studied. The effects of different SA concentrations on mycelial development of Fol were tested in vitro and two concentrations of SA and GE were included in pot experiment. SA completely inhibited the mycelial development of Fol in vitro at concentrations from 0.6 mM to 1.0 mM and ED50 value was found as 0.51 mM. GE could increase dry weight of plant,length of shoot and root growth irrespective whether Fol infected the tomato plants. The root colonization …

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Defining Effective Salt Leaching Regions Between Drains, Ömer Anapali, Üstün Şahi̇n, Taşkin Öztaş, Abdurrahman Hanay Jan 2001

Defining Effective Salt Leaching Regions Between Drains, Ömer Anapali, Üstün Şahi̇n, Taşkin Öztaş, Abdurrahman Hanay

Turkish Journal of Agriculture and Forestry

The application of sufficient amounts of leaching water by means of an effective method is very important in the management and reclamation of saline and sodic soils. Reclamation cannot be achieved with insufficient leaching water application, while excess water application may cause severe problems in soil. Knowledge of the leaching regions and intensities may help to control the amounts of leaching water through effective leaching methods in areas of limited leaching. This study was undertaken to define the vertical and horizontal leaching regions between drains,using geostatistical methods under laboratory conditions. Vertical and horizontal distribution patterns of soil salinity following leaching …

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An Evapotranspiration Model For Nursery Plants Grown In A Lysimeter Under Field Conditions, Hali̇l Kirnak, Ted Henry Short Jan 2001

An Evapotranspiration Model For Nursery Plants Grown In A Lysimeter Under Field Conditions, Hali̇l Kirnak, Ted Henry Short

Turkish Journal of Agriculture and Forestry

A modified combination model that used ambient temperature,relative humidity,solar radiation,air velocity and leaf area index (LAI) as inputs was developed for nursery plants, and its prediction was compared to the measured ET of the plant. A nursery plant of red maple (Acer rubrum) grown in a lysimeter under field conditions was used to test it. This modified combination model was shown to accurately estimate the evapotranspiration (ET) of a potted red maple (R^2=0.79). The most significant driving parameters for ET were solar radiation level and vapor pressure deficit (VPD). An exponential relationship between stomatal resistance and solar radiation for red …

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Search For O-Type Plants In Sugar Beet, Mustafa Erdal Jan 2001

Search For O-Type Plants In Sugar Beet, Mustafa Erdal

Turkish Journal of Agriculture and Forestry

This research was started in 1995 in order to find O-types, which are important basic materials in breeding monogerm hybrid sugar beets, and to develop their male sterile parallels in six monogerm families previously bred in the Plant Breeding Department of the Sugar Institute. For this purpose, a total of 600 (100 from each family) O-type candidate fertile plants were crossed with testers which were known to be cytoplasmic male steriles (CMS) by mating one fertile and one male sterile plant in a cage insulated with cotton cloth. In crossing male sterile and fertile plants, a sufficient amount of seed …

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The Yield And Yield Components Of Some Narbonne Vetch (Vicia Narbonensis L.) Lines In Tokat Ecological Conditions, Uğur Büyükburç, Selahatti̇n İptaş Jan 2001

The Yield And Yield Components Of Some Narbonne Vetch (Vicia Narbonensis L.) Lines In Tokat Ecological Conditions, Uğur Büyükburç, Selahatti̇n İptaş

Turkish Journal of Agriculture and Forestry

This study was conducted under Tokat ecological conditions during 1993/94, 1994/95 and 1995/96. Fifteen narbonne vetch (Vicia narbonensis L.) lines obtained from ICARDA were used. The results of variance analyses showed that there were statistically significant differences among lines for some characters. The highest seed yield (217.2 kg/da) was produced by the line 2466 and the lowest (144.9 kg/da) by the line 2380. 1000-seed weight ranged between 158.7 and 301.2 g, whereas biological yield ranged between 547.4 and 848.1 kg/da. At the end of this study, it was found that the lines 2466 and 2461 had good performance while the …

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Effect Of Boron Application On The Yield And Quality Of Sugar Beet, Sai̇t Gezgi̇n, Mehmet Hamurcu, Mustafa Apaydin Jan 2001

Effect Of Boron Application On The Yield And Quality Of Sugar Beet, Sai̇t Gezgi̇n, Mehmet Hamurcu, Mustafa Apaydin

Turkish Journal of Agriculture and Forestry

This research was conducted to determine the effects of application methods and the levels of boron on the root yield and quality of sugar beet in the Konya-Altınekin plain. The experimental soil was sandy loam, poor in organic matter and rich in calcium carbonate. The soil was alkaline in reaction and sufficient in boron content (0.55 ppm). In this work, three different levels of boron in borax form (0, 0.3 and 0.6 kg B/da) were applied with five different methods (soil, leaf, seed, soil + leaf, seed + leaf). The results showed that the root yield and refined sugar yield …

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Water-Use Efficiency (Wue) And Change In The Yield-Response Factor (Ky) Of Cotton Irrigated By An Irrigation Drip System, Ahmet Ertek, Riza Kanber Jan 2001

Water-Use Efficiency (Wue) And Change In The Yield-Response Factor (Ky) Of Cotton Irrigated By An Irrigation Drip System, Ahmet Ertek, Riza Kanber

Turkish Journal of Agriculture and Forestry

This study was conducted to investigate the effect of water-use efficiency and changes in the yield-response factor of cotton irrigated with an irrigation drip system. The amount of water applied was based on free surface evaporation from a screened Class-A Pan. Irrigation treatments consisted of two different irrigation intervals (I1: 5; I2: 10 days), three plant-pan coefficients (Kcp1: 0.75; Kcp2: 0.90, Kcp3: 1.05) and two different soil surface wetting percentages (P1: 0.70 and P2: based on cover percentage of the crop). The first irrigation was applied when the available soil water content in the 120 cm of the soil profile …

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An Application Of Linear Approximation Of Almost Ideal Demand System: Data From Erzurum Central District, Fahri̇ Yavuz, Mustafa Baydemi̇r Jan 2001

An Application Of Linear Approximation Of Almost Ideal Demand System: Data From Erzurum Central District, Fahri̇ Yavuz, Mustafa Baydemi̇r

Turkish Journal of Agriculture and Forestry

In this study, a food demand analysis of Erzurum central district was conducted. This study differs from previous ones by the use of current data and a new model. Various elasticities computed in this study might be used in the analysis of food consumption policies. The cross-sectional and time series data used were collected by surveying 30 families once every three months from July 1995 to April 1997. Data from a total of 240 families were used to divide the families into high and low income groups. A demand analysis was done using LA/AIDS for five food groups (cereal, vegetable, …

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Some Mechanical Properties Of Alder [Alnus Glutinosa Subsp. Barbata (C. A. Mey.) Yalt.] Wood Obtained From Artvin Region, Bi̇lgi̇n Güller, Nurgül Ay Jan 2001

Some Mechanical Properties Of Alder [Alnus Glutinosa Subsp. Barbata (C. A. Mey.) Yalt.] Wood Obtained From Artvin Region, Bi̇lgi̇n Güller, Nurgül Ay

Turkish Journal of Agriculture and Forestry

In this study, some mechanical properties of Alder [Alnus glutinosa subsp. barbata (C. A. Mey.) Yalt.] wood were investigated. The experiments were carried out on test specimens obtained from 10 selected experimental trees taken from Artvin region. The selection of the experimental trees, preparation of the test specimens and application of the test procedures were carried out according to the relevant Turkish standards. Some mechanical properties of Alder wood such as compression strength parallel to grain, static bending strength, modulus of elasticity, impact strength (impact bending), tension strength parallel to grain, shear strength, cleavage strength and values of Brinell-hardness were …

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An Investigation Of Winter Harvesting On Steep Terrain In Forestry, Hafiz Hulusi̇ Acar, Bi̇lal Di̇nç Jan 2001

An Investigation Of Winter Harvesting On Steep Terrain In Forestry, Hafiz Hulusi̇ Acar, Bi̇lal Di̇nç

Turkish Journal of Agriculture and Forestry

Forest productions are very difficult, expensive and time consuming. In the Black Sea Region, forests cover generally high and steep slopes of mountainous areas. Therefore, the problems of forestry production studies are gaining in importance. In forestry production studies, the absence of mechanization level and its application causes qualitative and quantitative losses. In this study, the time required for felling and skidding operations in winter were determined and factors affecting logging were observed and recorded. The data obtained were later analyzed. According to this study, productivity at winter harvesting for felling operations is 1,948 m^3/h, for skidding with human power …

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The Chemistry Of Fresh Tomato Flavor, Emi̇n Yilmaz Jan 2001

The Chemistry Of Fresh Tomato Flavor, Emi̇n Yilmaz

Turkish Journal of Agriculture and Forestry

Tomato flavor results from taste components, aromatic volatiles and a complex interaction between them. Lack of characteristic flavor in supermarket tomatoes is a common consumer complaint. Sugars, organic acids, free amino acids, and salts are the main taste components. With over 400 volatile compounds identified, only thirty are present in concentrations over one ppb and of these, only 16 contribute significantly to the perceptible flavor. Radiolabeled substrate and enzyme denaturation studies have indicated involvement of some pathway enzymes in the biosynthesis of tomato aroma compounds. Studies of fresh tomato flavor are important for the efforts at improving fruit quality through …

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Serving Size And Gender Effects On Product (Lemonade) Acceptance And Just-Right Attribute Ratings, Zehra Ayhan, Chen-Ta Li, Matrid K. Ndife, Q. Howard Zhang Jan 2001

Serving Size And Gender Effects On Product (Lemonade) Acceptance And Just-Right Attribute Ratings, Zehra Ayhan, Chen-Ta Li, Matrid K. Ndife, Q. Howard Zhang

Turkish Journal of Agriculture and Forestry

The serving size and gender effects on product acceptance and ideal attribute (lemonade flavor, sourness and sweetness) ratings of lemonade were investigated using a 15-point hedonic scale and a 5-point just-right scale, respectively. Females (67) and males (68) consumed a 4 oz (118 ml) sample ad libitum, or a full 8 oz (236 ml) serving. Ad libitum male consumption was not different (p>0.05) from female consumption. A low correlation (R^2=0.011) was observed between the amount of lemonade consumed and product acceptability or just-right attribute ratings. Neither serving size nor gender had an effect on the overall acceptability (p>0.05). …

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Determination Of Pollen Quality, Quantity And Effect Of Cross Pollination On The Fruit Set And Quality In The Pomegranate, Kubi̇lay Deri̇n, Si̇nan Eti̇ Jan 2001

Determination Of Pollen Quality, Quantity And Effect Of Cross Pollination On The Fruit Set And Quality In The Pomegranate, Kubi̇lay Deri̇n, Si̇nan Eti̇

Turkish Journal of Agriculture and Forestry

This research was carried out to determine the pollen quality (pollen viability and germination), quantity (pollen production) and the role of cross pollination on the fruit set in Hicaz and 33 N 26 pomegranate cultivars under Adana ecological conditions in 1997. Pollen viability levels with TTC and FDA, pollen germination level with agar in the petri method, and pollen production capacity with the hemacytometric method of these cultivars were determined in both male (A type-unfertile) and bisexual (B type-fertile) flowers. In addition to these experiments, the changes in the fruit set and fruit quality in open-, self- and cross-pollination (with …

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Combinatorial Optimization In Forest Ecosystem Management Modeling, Emi̇n Zeki̇ Başkent Jan 2001

Combinatorial Optimization In Forest Ecosystem Management Modeling, Emi̇n Zeki̇ Başkent

Turkish Journal of Agriculture and Forestry

Modeling forest management activities has been tackled by scientists over the last two decades. Both simulation and optimization techniques have been used in solving forest management planning problems. With the introduction of ecosystems management that focuses on the sustainable production and maintenance of ecological, social and economical values, neither approach provided a credible solution technique to help design the complex structure of forest management activities. Alternative to these, is a group of meta-heuristic or combinatorial optimization techniques which have just gained the attention of forest modelers. In this paper, an attempt is made to introduce the concept of combinatorial optimization, …

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The Determination Of Some Physical Properties Of Beech Wood (Fagus Orientalis Lipsky.) In The Andırın Region, İbrahi̇m Bektaş, Cengi̇z Güler Jan 2001

The Determination Of Some Physical Properties Of Beech Wood (Fagus Orientalis Lipsky.) In The Andırın Region, İbrahi̇m Bektaş, Cengi̇z Güler

Turkish Journal of Agriculture and Forestry

The main aim of this study was to determine some physicals properties of the beech wood (Fagus orientalis Lipsky.) naturally growing in the Andırın region (the East Mediterranean region), and compare these properties with those of beech wood growing in the Black Sea region. The physical properties investigated were air and oven-dry density, basic density value, tangential, radial, longitudinal and volumetric shrinkage and swelling. The tests of the physical properties were performed on small clean specimens of beech wood selected from the most suitable stands by following the conventional methods. The average air-dry density, oven-dry density, basic density value, volumetric …

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Provenance Variations In 3-Year-Old Lebanon Cedar (Cedrus Libani A. Rich.) Seedlings, Ali̇ Demi̇rci̇, Nebi̇ Bi̇li̇r Jan 2001

Provenance Variations In 3-Year-Old Lebanon Cedar (Cedrus Libani A. Rich.) Seedlings, Ali̇ Demi̇rci̇, Nebi̇ Bi̇li̇r

Turkish Journal of Agriculture and Forestry

This research was realized to study the morphological characteristics of 3-0 years old seedlings, obtained from seeds, which were collected from 22 Lebanon cedar seed stands. The seedlings were grown at the Nursery of the Black Sea Technical University. Seedling morphological properties were studied including height, root-collar diameter, number of branches, the length of the longest branch, and fresh and dry weights of root, stem, and seedlings. Means of these properties were found to be 20.8 cm for height, 4.1 mm for root-collar diameter, 7.1 for number of branches, 7.2 cm for the length of the longest branch, 3.6 g …

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Determination Of Soil Water Content After Fallow, Winter And Spring Sown Lentil In Dry Farming Areas, M. Sai̇t Adak Jan 2001

Determination Of Soil Water Content After Fallow, Winter And Spring Sown Lentil In Dry Farming Areas, M. Sai̇t Adak

Turkish Journal of Agriculture and Forestry

This research was carried out from 1993 through 1995 for a two-year period in dry farming areas of Haymana/Ankara. The aim of the research was to determine the available water content of the 0-60 and 0-90 cm soil depth layers for wheat after fallow periods and after winter and spring crops of lentils under two different soil tillage treatments. According to the experimental results, the highest available water content was measured in fallow plots (28.6% (rototiller 0-60 cm) and 94.6% plough 0-90 cm). The available water contents were found to be -14.9% (plough 0-60 cm) and 14.8% (rototiller 0-90 cm) …

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In Situ Localisation Of Axi 1 (Auxin Independent) Gene In Rhizobium Leguminosarum Inoculated Root Tips Of Pea Plants, Yeşi̇m Yalçin Mendi̇, Katharina Pawlowski, Seli̇m Çeti̇ner Jan 2001

In Situ Localisation Of Axi 1 (Auxin Independent) Gene In Rhizobium Leguminosarum Inoculated Root Tips Of Pea Plants, Yeşi̇m Yalçin Mendi̇, Katharina Pawlowski, Seli̇m Çeti̇ner

Turkish Journal of Agriculture and Forestry

Axi 1 is the only characterized auxin independent gene in tobacco plants. In this study, the effect of axi 1 gene on cortical cell division during different stages of nitrogen fixation and on the role of polar auxin transport were investigated. Root and nodule samples were taken from pea seedlings 24 hours, 48 hours, 6 days and 10 days after inoculation with R. leguminosarum PRE strain. Using in situ hybridisation, the location of the axi 1 gene expression in root and nodule tissues was identified. The results showed that in root tissues inoculated with Rhizobia, the axi 1 gene is …

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Production Of Ice Cream With Cola Extract, Muhammet Dervi̇şoğlu, Fehmi̇ Yazici Jan 2001

Production Of Ice Cream With Cola Extract, Muhammet Dervi̇şoğlu, Fehmi̇ Yazici

Turkish Journal of Agriculture and Forestry

In this study, the use of cola extract and cola flavor in ice cream production were investigated. Cola extract was used at rates of between 0 and 1.5% based on mix weight. The samples with Na_2CO_3 (between 0 and 20% and based on the weight of cola extract) were used to balance the acidic taste of the samples due to the low pH of the cola extract. Cola flavor was used at rates of between 0 and 0.15% based on mix weight. According to the sensory evaluation results, the ice cream containing 0.75% cola extract, 15% Na_2CO_3 and 0.10% cola …

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Kinetic Studies With Crude Tomato Lipoxygenase, Emi̇n Yilmaz Jan 2001

Kinetic Studies With Crude Tomato Lipoxygenase, Emi̇n Yilmaz

Turkish Journal of Agriculture and Forestry

Crude tomato lipoxygenase (LOX) from ripe Florida47 tomatoes was used in this study. Extracted crude LOX was assayed spectrophotometrically. The effects of different buffers and pHs, substrate preparations, temperature and tissue location on LOX activity were evaluated. The enzyme was most active with MES buffer at a pH of 6.0 and a temperature of 25ºC. The best substrate was the first preparation with linoleic acid/Tween 20 at a ratio of 1:1.5. The kinetic parameters determined under the best conditions were a Km of 4.198 mM and a Vmax of 0.84 mM/min. The enzyme was heat labile, and most activity was …

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Water Diffusion Coefficients Of Selected Legumes Grown In Turkey As Affected By Temperature And Variety, Ferda Seyhan Gürtaş, M. Mehmet Ak, E. Özgül Evranuz Jan 2001

Water Diffusion Coefficients Of Selected Legumes Grown In Turkey As Affected By Temperature And Variety, Ferda Seyhan Gürtaş, M. Mehmet Ak, E. Özgül Evranuz

Turkish Journal of Agriculture and Forestry

The kinetics of water absorption by chickpeas (Koçbaşı, Kuşbaşı), lentils (green Pul) and beans (Battal, Dermason, Horoz, Şeker) grown in Turkey were studied by a gravimetric method during soaking at 15, 25 and 40ºC to determine moisture diffusivity of these selected legumes. The water diffusion coefficients of the legumes were in the range 9.71x10^{-11} - 5.98x10^{-10} m^2/s for the chickpeas, 3.53x10^{-10} - 1.33x10^{-9} m^2/s for the lentils and 4.35x10^{-11} - 3.79x10^{-9} m^2/s for the beans. An Arrhenius-type equation described the strong temperature effect on the diffusion coefficient with activation energies of 48.6-49.8 kJ/g-mol for chickpeas, 39.7 kJ/g-mol for lentils, and …

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A Chorological Study On The Taxa Naturalized In The Eastern Black Sea Region, Sali̇h Terzi̇oğlu, Rahi̇m Anşi̇n Jan 2001

A Chorological Study On The Taxa Naturalized In The Eastern Black Sea Region, Sali̇h Terzi̇oğlu, Rahi̇m Anşi̇n

Turkish Journal of Agriculture and Forestry

Diaspores of taxa with large ecological tolerance can be easily carried between continents and some of these taxa become an important factor, threatening the maintenance of plant species diversity, in addition to other factors, such as clear-cutting, over-grazing and dwellings. Chorological study is an important step for conserving plant species diversity, and it provides information about naturalized plant taxa that have migrated from one continent to others. Presenting the floristic relationships between the continents is important for plant geography and paleobotany. The chorological features of 32 taxa of flowering plants belonging to 14 families, naturalized in the Eastern Black Sea …

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A Study On Turkish Rhododendron L. (Ericaceae), Sali̇h Terzi̇oğlu, Nesi̇me Merev, Rahi̇m Anşi̇n Jan 2001

A Study On Turkish Rhododendron L. (Ericaceae), Sali̇h Terzi̇oğlu, Nesi̇me Merev, Rahi̇m Anşi̇n

Turkish Journal of Agriculture and Forestry

Some of the Turkish Rhododendron L. taxa need wood anatomical and palynological studies for their certain determination together with morphological studies. Therefore, some of them were studied and a revised list of them is given. New distribution areas of a newly recorded endemic variety of Rhododendron ponticum L. (Rhododendron ponticum L. subsp. ponticum var. heterophyllum Anşin) were determined: A7 Trabzon: Maçka, A8 Rize: Çamlıhemşin and A8 Artvin: Murgul, in addition to the already known A8 Trabzon: Of region. Morphological, wood anatomical and palynological features of very rare white-flowered specimens of Rhododendron ponticum L. were compared to the main taxa of …

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Withdrawal Strength Of Dowels In Plywood And Oriented Strand Board, Yusuf Zi̇ya Erdi̇l, Carl A. Eckelman Jan 2001

Withdrawal Strength Of Dowels In Plywood And Oriented Strand Board, Yusuf Zi̇ya Erdi̇l, Carl A. Eckelman

Turkish Journal of Agriculture and Forestry

Plywood and oriented strand board (OSB) are being used increasingly in the construction of upholstered furniture frames. Yet there is little information available concerning the holding strength of various fasteners, and, in particular, dowels in these materials. A study was conducted accordingly, to obtain basic information about the holding strength of dowels in both plywood and oriented strand board. Results of the tests were incorporated into predictive expressions that allow designers to estimate withdrawal strength as a function of the diameter of the dowels, their depth of embedment and the density of the composite material. Given the variability of the …

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Evaluation Of Some Chemical Extraction Methods Used As Indices Of Soil Nitrogen Availability In Polatlı State Farm Soils In Ankara Province, Abdel Karim Hassan Awad Elkarim, Sadik Usta Jan 2001

Evaluation Of Some Chemical Extraction Methods Used As Indices Of Soil Nitrogen Availability In Polatlı State Farm Soils In Ankara Province, Abdel Karim Hassan Awad Elkarim, Sadik Usta

Turkish Journal of Agriculture and Forestry

In pursuit of evaluating the suitability of methods for determining the ability of soils to supply available nitrogen under different soil conditions, two biological aerobic and anaerobic incubation procedures and six chemical extraction methods were applied to 31 samples of soil collected from the Central Anatolian area. The selected area for the study represents the criteria of arid and semi-arid regions. Statistically significant correlation coefficients were found between the biological methods and the five chemical methods that were evaluated out of the six. Only the alkaline KMnO_4 method did not give a significant correlation cofficient. The results of the phosphate-borate …

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A Study On Selecting Suitable Types Of The Anatolia Sage (Salvia Fruticosa Mill.) In The Flora Of Western Anatolia, Emi̇ne Bayram Jan 2001

A Study On Selecting Suitable Types Of The Anatolia Sage (Salvia Fruticosa Mill.) In The Flora Of Western Anatolia, Emi̇ne Bayram

Turkish Journal of Agriculture and Forestry

In this study, Salvia fruticosa Mill. seeds were collected from different locations in west and south-west Anatolia, Turkey, to establish a population. This population was grown under the Bornova ecological conditions for determination of agronomical and technological traits in order to develop a standard variety by selecting the types with better quality and yield using the clonal selection method. The population included the seeds collected from seventeen different locations in the provinces of Muğla, Antalya, İzmir, Aydın, Tekirdağ, Çanakkale and Balıkesir. Plant height, the yields of fresh herbage, drug herbage, drug leaf and essential oil content for each population in …

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