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Articles 1681 - 1710 of 2171
Full-Text Articles in Life Sciences
Effects Of Bleaching And Impregnation Processes On The Hardness Of The Varnish Layer In Beech Wood, Yalçin Örs, Musa Atar
Effects Of Bleaching And Impregnation Processes On The Hardness Of The Varnish Layer In Beech Wood, Yalçin Örs, Musa Atar
Turkish Journal of Agriculture and Forestry
This study was performed to determine the effects of bleaching and impregnation processes on the hardness of the varnish layer in beech wood. For this purpose, samples were impregnated with Tanalith-CBC and Immersol-WR 2000 and bleached with the solution groups (18%) NaOH+H_2O_2, NaOH+ Ca(OH)_2 +H_2O_2, NaOH+ MgSO_4+ H_2O_2, NaHSO_3+H_2C_2O_4.2H_2, NaSiO_3 +H_2O_2, KMnO_4 +NaHSO_3+H_2O_2. Synthetic varnishing was used and the hardness of the varnish layer was determined according to ASTM-D-4366. The mean hardness values (swing) of the control samples were found to be 35.57 for unimpregnated and varnished samples, 23.50 for samples treated with solution groups and varnished samples, 45.78 for …
The Effect Of Wood Specimen Length On The Proportional Saturation Of Preservative Fluid In Sitka Spruce (Picea Sitchensis (Bong.)Carr.) And Corsican Pine (Pinus Nigravar.Mantima), İlker Usta, Ari̇f Güray
The Effect Of Wood Specimen Length On The Proportional Saturation Of Preservative Fluid In Sitka Spruce (Picea Sitchensis (Bong.)Carr.) And Corsican Pine (Pinus Nigravar.Mantima), İlker Usta, Ari̇f Güray
Turkish Journal of Agriculture and Forestry
In this study, the proportional saturation and the fluid uptake of preservative liquid (that was) applied under the same pressure was investigated comparatively on the various longitudinal length of wood specimens in the two softwood species. Wood specimens of Sitka spruce (Picea sitchensis (Bong.)Carr.) and Corsican pine (Pinus nigra var.mantima) representative of two different permeability classifications, cut into five different lengths were treated with tanalith-C using the full-cell process under the same conditions. It appeared that longitudinal fluid flow decreased with increased specimen lengths. The shorter lengths were saturated effectively due to the shorter flow paths,and their retentions were higher …
Variation In Growth Of 20-Year-Old Provenance Trial Of Sitka Spruce (Picea Sitchensis(Bong.)Carr.) In Great Britain, İlker Usta
Turkish Journal of Agriculture and Forestry
Variation in growth of the cambial age (tree diameter) and tree volume was investigated in eight seed origins of Sitka spruce Picea sitchensis (Bong.) Carr.) grown at two sites in Great Britain. The trial seed origins were collected from 58 ºN to 41 ºN latitude, 134 ºW to 123 ºW longitude, and 0 m to 140 m altitude in the natural range of Sitka spruce that extends in a narrow coastal strip from Alaska to California (Alaska -AL,British Columbia -BC, Queen Charlotte Islands -QCI, North Washington -NW, South Washington -SW,North Oregon -NO,South Oregon -SO,California -CA). The experimental plantations were raised …
Changes In Weed Response To 2,4-D Application With 5 Repeated Applications In Spring Wheat, Hüseyi̇n Zengi̇n
Changes In Weed Response To 2,4-D Application With 5 Repeated Applications In Spring Wheat, Hüseyi̇n Zengi̇n
Turkish Journal of Agriculture and Forestry
2,4-D amine and 2,4-D isooctylester were sprayed repeatedly in the spring of 5 consecutive years on spring wheat (Triticum aestivum L.cv.Kırik)in Erzurum during the years 1990-1994. The herbicide efficacy against all broad-leaved weeds and against the most common weed species was determined by comparing the number of weeds in untreated and treated plots. The most abundant weed species were Polygonum aviculare, Amaranthus retroflexus and Chenopodium albumin spring wheat. The effect of 2,4-D amine decreased after 3 or 4 years in A.retroflexus, C.album,Convolvulus arvensis, Acroptilon repens, Lactuca serriola, P.aviculare, Cirsium arvense and other broad-leaved weeds. Effects against Sinapis arvensis and Sisymbrium …
Screening Of Wheat Varieties For Resistance To Head Scab Caused By Fusarium Graminearum Schwabe, Si̇bel Dervi̇ş
Screening Of Wheat Varieties For Resistance To Head Scab Caused By Fusarium Graminearum Schwabe, Si̇bel Dervi̇ş
Turkish Journal of Agriculture and Forestry
In this study, variability in pathogenicity among Fusarium graminearum isolates from different locations in Ohio was determined. The most virulent isolates from these locations were chosen and used in segregation studies to evaluate the resistance of some resistant by resistant winter wheat crosses to Fusarium head scab. Differences in pathogenicity levels were significant among isolates even from the same location. Several generalizations can be made about the segregating generations in this study. The results indicated that Ning 7840 carries multiple genes for resistance. In addition, we found that Freedom and Ning 7840 have at least one resistance gene different. Although …
Heterologous Expression Of Genes In The Yeast Saccharomyces Cerevisiae, Numan Özcan
Heterologous Expression Of Genes In The Yeast Saccharomyces Cerevisiae, Numan Özcan
Turkish Journal of Agriculture and Forestry
Both an \alpha-amylase gene of Bacillus subtilis RSKK246 and a gene encoding \beta-glucanase from B.subtilis RSKK243 were cloned and expressed in both E.coli XL1-Blue MRF and B.subtilis YB886 by using the vectors pUC18 and pUB110 respectively. These genes were also cloned into the E.coli-yeast shuttle vectors pRS406 and pRS416 for transfer into the yeast Saccharomyces cerevisiae.These constructs carrying \alpha -amylase and \alpha -glucanase,genes which were cloned into the pRS406 vector,were expressed by integration into the yeast chromosome.These genes were also expressed in the yeast by autonomous replication of the ARS/CEN plasmid pRS416.This work demonstrates that genes belonging to B.subtilis can …
The Effects Of Different Row Spacings, Cutting Heights And Stubble Burning On Seed Yield And Yield Components Of Crested Wheatgrass (Agropyron Cristatum), Ahmet Gökkuş, Yunus Seri̇n, Ali̇ Koç, Mustafa Tan
The Effects Of Different Row Spacings, Cutting Heights And Stubble Burning On Seed Yield And Yield Components Of Crested Wheatgrass (Agropyron Cristatum), Ahmet Gökkuş, Yunus Seri̇n, Ali̇ Koç, Mustafa Tan
Turkish Journal of Agriculture and Forestry
This trial was conducted on the experimental fields of the Agricultural Faculty at Atatürk University in 1987-92 and five-year results were evaluated except for the first year. The effects of different row spacings (20, 30 and 40 cm), cutting stubble heights (2.5, 5.0 and 7.5 cm) and stubble burning on seed yield and yield components of crested wheatgrass (Agropyron cristatum) were studied. According to five-year averages, the effects of row spacings on the seed and straw yield, reproductive shoot number per m^2 and seed number and weight per spike were significant. The values for all parameters were increased by expanding …
Using Pheromone Traps To Control California Red Scale Aonidiella Aurantii (Maskell) (Hom.: Diaspididae) In The Eastern Mediterranean Region, Mehtap Aytaş, Rabi̇a Yumruktepe, Cafer Mart
Using Pheromone Traps To Control California Red Scale Aonidiella Aurantii (Maskell) (Hom.: Diaspididae) In The Eastern Mediterranean Region, Mehtap Aytaş, Rabi̇a Yumruktepe, Cafer Mart
Turkish Journal of Agriculture and Forestry
In this study the possibility of using pheromone traps against California Red Scale (C.R.S.), Aonidiella aurantii (Maskell) (Hom.: Diaspididae), the main pest of citrus fruits, was examined. In 1995 and 1996 the male flight periods and four peak points were determined. There was a significant correlation between trapped males and leave-fruit C.R.S. populations. By the use of pheromone traps the unobserved C.R.S. population can be determined in the orchard. The most suitable application time could be determined properly from the IPM point of view. Also mass trapping for C.R.S. was not found to be a promising method according to effectiveness …
Oil Content And Oil Quality Properties Of Some Grape Seeds, Ni̇lgün Göktürk Baydar, Murat Akkurt
Oil Content And Oil Quality Properties Of Some Grape Seeds, Ni̇lgün Göktürk Baydar, Murat Akkurt
Turkish Journal of Agriculture and Forestry
In the present study, the oil contents and some oil quality properties of seeds taken from 18 grape cultivars were examined. The results showed that the oil concentration of seeds ranged from 11.6 to 19.6%. Grape seeds were rich in oleic and linoleic acids, ranging from 17.8 to 26.5% and 60.1 to 70.1%, respectively. The degree of unsaturation in the grape seed oil was over 86%, and the average concentration of total tocopherol in oil was around 454 mg/kg. The results indicate that grape seed oil could be an important source for production of an edible vegetable oil and lowering …
Isolation And Characterization Of Sequences Homologous To The Tobacco Clone Axi 1 (Auxin Independent) From A Vicia Sativa Nodule Cdna Library, Yeşi̇m Yalçin Mendi̇, Seli̇m Çeti̇ner, Ton Bisseling
Isolation And Characterization Of Sequences Homologous To The Tobacco Clone Axi 1 (Auxin Independent) From A Vicia Sativa Nodule Cdna Library, Yeşi̇m Yalçin Mendi̇, Seli̇m Çeti̇ner, Ton Bisseling
Turkish Journal of Agriculture and Forestry
In this research, partial nucleotide sequences of the axi 1 gene, which is related to auxin perception and transduction, isolated from Vicia sativa using cDNA library screening were investigated. Four V. sativa cDNA clones representing homologous of the tobacco axi 1 (auxin independent) cDNA clone were isolated and characterized. With sequence analysis two different clones were observed, called 10/3a and 16/3b. Sequences about 500 bp from the 5' end and 450 bp from the 3' end were determined from the 10/3a clone. The sequences from the 5' end of cDNA clone 10/3a shared about 58 % similarity at the nucleotide …
In Vitro Plantlet Regeneration From Mature Embryos Of Linden (Tilia Platyphyllos Scop.) And Multiplication Of Its Buds, Ali̇ Ömer Üçler, Nuray Mollamehmetoğlu
In Vitro Plantlet Regeneration From Mature Embryos Of Linden (Tilia Platyphyllos Scop.) And Multiplication Of Its Buds, Ali̇ Ömer Üçler, Nuray Mollamehmetoğlu
Turkish Journal of Agriculture and Forestry
In this study, the effects of different sucrose, BAP and Kinetin concentrations in MS medium on plantlet formation, bud formation on the plantlets and development of embryos isolated from the seeds of Tilia platyphyllos under in vitro conditions were investigated. In addition, the effects of different culture times on the development of embryos and plantlet formation were studied. The results indicated that the cultured embryos on the media supplemented with sucrose (10, 20, 30, 40, 50 and 60 g/l) developed plantlets with epicotyls and roots. The best results were obtained on the medium supplemented with 30 g/l of sucrose. Epicotyls …
Dynamic Behavior Of The Onion Price In Turkey, Hali̇l Fi̇dan, Ali̇ Koç
Dynamic Behavior Of The Onion Price In Turkey, Hali̇l Fi̇dan, Ali̇ Koç
Turkish Journal of Agriculture and Forestry
This study analyzes the onion market and the dynamic behavior of real onion prices in Turkey. The price responsiveness of the supply, demand and export of dry onions was determined. The equilibrium price for producers was derived using the market closing condition of the partial equilibrium model. Price flexibility was also estimated using wholesale market data. The results verified the existence of cyclical behavior of onion prices in the market. The elasticities evaluated at the sample mean were 0.26, -1.02, and -0.24 for supply, export demand and flexibility respectively. The household consumption data indicates that per capita consumption of onions …
Effects Of Bleaching Process On Hardness And Glossiness Of Pine Wood (Pinus Sylvestris L.) Exposed To Outdoor Conditions, Mehmet Budakçi, Musa Atar
Effects Of Bleaching Process On Hardness And Glossiness Of Pine Wood (Pinus Sylvestris L.) Exposed To Outdoor Conditions, Mehmet Budakçi, Musa Atar
Turkish Journal of Agriculture and Forestry
This study was performed to determine the effects of exposure to outdoor condition and of the bleaching process after exposure outdoor conditions after the bleaching process on hardness, both parallel and perpendicular to the fibre axis, on Scotchs pine (Pinus Sylvestris Lipsky) wood. For this purpose, samples were exposed to outdoor conditions for 12 months, and afterwards they were bleached with solution groups of 18% NaOH+H_2O_2, NaSiO_3+H_2O_2 and Ca(OH)_2+H_2O_2. After the bleaching process after exposure to outdoor conditions, hardness was determined according to ASTM-D 4366 and glossiness was determined according to ASTM-D 523. The mean hardness values (swing) of the …
Determination Of Some Alpine Plants Suitable For Landscape Planning In Erzurum And Surroundings, Fari̇s Karahan, Hasan Yilmaz
Determination Of Some Alpine Plants Suitable For Landscape Planning In Erzurum And Surroundings, Fari̇s Karahan, Hasan Yilmaz
Turkish Journal of Agriculture and Forestry
In this study, it was intended to determine the usage possibilites of some alpine plant species having high potential value as ornamental plants for landscape planning in Erzurum and environs. The investigation was conducted in 15 locations of 1750-3176 m altitudes between May 1997 and September 1998. In the study, direct plant observation methods were employed as well as floristic plant analysis. The results showed that 166 alpine plant species were found belonging 32 families and useful for landscape planning. Among these plant species 14 for water gardens, 20 for roof and terrace gardens, 32 for dry wall and rock …
A Study On The Adaptations Of Some Natural Ground Cover Plants And On Their Implications In Landscape Architecture In The Ecological Conditions Of Trabzon, Cengi̇z Acar, Mustafa Var
A Study On The Adaptations Of Some Natural Ground Cover Plants And On Their Implications In Landscape Architecture In The Ecological Conditions Of Trabzon, Cengi̇z Acar, Mustafa Var
Turkish Journal of Agriculture and Forestry
In this research, the adaptation and ground cover properties of some plants with aesthetic and functional features, found in the natural flora of the province of Trabzon, were investigated. Nineteen different natural ground cover plants from 8 families were chosen as trial plant material. These materials, which were mostly from the alpine zone, were planted as plugs in 1994. Survival rates and plant cover area were recorded and measured at the beginning of the vegetation season, during flowering, and at the end of the vegetation season in 1995 and 1996. Moreover, observations were made on some of the morphological properties …
Yield And Yield Components Of Wheat Sown After Winter Hungarian Vetch In Central Anatolia Conditions, Sai̇me Ünver, Muharrem Kaya, Mehmet Atak, Hakan B. Hakyemez
Yield And Yield Components Of Wheat Sown After Winter Hungarian Vetch In Central Anatolia Conditions, Sai̇me Ünver, Muharrem Kaya, Mehmet Atak, Hakan B. Hakyemez
Turkish Journal of Agriculture and Forestry
This research was conducted at the Research and Application Farm, Faculty of Agriculture, University of Ankara during the growing periods of 1996-1998. Winter Hungarian vetch treated with different inoculation methods (no inoculation, seed inoculation and soil inoculation) and nitrogen doses (0, 2, 4 kg N/da) was harvested in two periods (for hay and seed). Yield and some yield components of Bezostaja 1 bread wheat variety, which was sown in the same plots, were studied. According to the results of the study, harvest times (for hay and seed) caused significant differences in plant height, spike length and grain yield of wheat. …
Effect Of Glucosidases Enzyme Treatment On Aroma Compounds Of The White Muscat Of Alexandria And Emir Wines, Turgut Cabaroğlu, Ahmet Canbaş
Effect Of Glucosidases Enzyme Treatment On Aroma Compounds Of The White Muscat Of Alexandria And Emir Wines, Turgut Cabaroğlu, Ahmet Canbaş
Turkish Journal of Agriculture and Forestry
The effect of an exogenous commercial enzyme with glycosidase activities on free and glycosidically bound aroma compounds of the white wines obtained from muscat of Alexandria and Emir cultivars was investigated. The fermenting must was divided into two equal parts towards the end of the fermentation and 40 mg/l of enzyme was added to one part. The aroma compounds of the wines were extracted with Amberlite XAD-2 resin and were identified by gas chromatography-mass spectrometry. Their concentrations were determined by gas chromatography. As a result of the enzyme treatment, the concentration of free aroma compounds (terpenes, volatile phenols, C-13 norisoprenoids …
Response Of Popcorn (Zea Mays Everta) To Nitrogen Rates And Plant Densities, Sabri̇ Gökmen, Özer Sencar, Mehmet Ali̇ Saki̇n
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 …
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
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 …
Defining Effective Salt Leaching Regions Between Drains, Ömer Anapali, Üstün Şahi̇n, Taşkin Öztaş, Abdurrahman Hanay
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 …
An Evapotranspiration Model For Nursery Plants Grown In A Lysimeter Under Field Conditions, Hali̇l Kirnak, Ted Henry Short
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 …
Search For O-Type Plants In Sugar Beet, Mustafa Erdal
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 …
The Yield And Yield Components Of Some Narbonne Vetch (Vicia Narbonensis L.) Lines In Tokat Ecological Conditions, Uğur Büyükburç, Selahatti̇n İptaş
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 …
Effect Of Boron Application On The Yield And Quality Of Sugar Beet, Sai̇t Gezgi̇n, Mehmet Hamurcu, Mustafa Apaydin
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 …
Water-Use Efficiency (Wue) And Change In The Yield-Response Factor (Ky) Of Cotton Irrigated By An Irrigation Drip System, Ahmet Ertek, Riza Kanber
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 …
An Application Of Linear Approximation Of Almost Ideal Demand System: Data From Erzurum Central District, Fahri̇ Yavuz, Mustafa Baydemi̇r
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, …
Some Mechanical Properties Of Alder [Alnus Glutinosa Subsp. Barbata (C. A. Mey.) Yalt.] Wood Obtained From Artvin Region, Bi̇lgi̇n Güller, Nurgül Ay
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 …
An Investigation Of Winter Harvesting On Steep Terrain In Forestry, Hafiz Hulusi̇ Acar, Bi̇lal Di̇nç
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 …
The Chemistry Of Fresh Tomato Flavor, Emi̇n Yilmaz
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 …
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
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). …