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Türk Bilim ve Mühendislik Dergisi
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2687-6086
Published by DergiPark Homepage  [220 journals]
  • Experimental Investigation of Air Leakage in Different Rectangular Air
           Ducts

    • Authors: Erol TÜRKOĞLU ; Ahmet ÖZSOY
      Abstract: Air leaks are inevitable due to differences in manufacturing, assembly and labor of air ducts. In this study, six different sized (500x400, 450x400, 400x400, 300x400, 250x350, 150x250 mm) rectangular air ducts of the same length were tested. According to the test results air leaks were determined for the unit surface area and unit clamping and joint length, and the sealing classes of the ducts were determined. When the air leakage in the ducts compared, it was seen that the losses for unit surface area and unit clamping and joint length show similar characteristics. It was observed that as the test pressure increased, the air leakage increases, and as the duct dimensions decreased, the amount of leakage increases. In addition, the use of gasket and silicone for sealing in the air duct of 500x400 mm has been investigated. Furthermore, the effect of using acoustic plate with gasket and silicone was also examined. It was observed that air leakage is reduced by 52% at 400 Pa test pressure and 24% at 1500 Pa test pressure with the use of acoustic plate. In order to reduce energy losses from the air leakage, duct systems must be tested before commissioning and it must be confirmed that the leakage in the duct meets the specification.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • Alternative Food Source in Human Nutrition: Oat

    • Authors: Ruziye KARAMAN ; İ̇lknur AKGÜN , Cengiz TÜRKAY
      Abstract: In addition to being animal feed and human food; oat importance is increasing day by day due to the increasing usage areas in the pharmaceutical and cosmetics industry. Oats come to the forefront in human nutrition thanks to its protein quality, high unsaturated oil and fiber content and antioxidant richness. It has the highest content in terms of both β-glucan (3-8 %) and avenantramide (180.94 to 292.15 mg kg-1), especially in cereals. Also, due to being low amount of gluten it contains, it is used as gluten-free food and can be consumed by celiac patients. Thanks to the nutrients contained in oat grains, have positive effects on chronic diseases such as cholesterol, diabetes, anemia, cardiovascular diseases and colon cancer. Despite the increasing demand for oat, due to different usage areas in recent years, there are not enough developed commercial varieties to meet the needs of consumers. It is thought that oat, which has an increasing importance in terms of healthy life in the world and our country, should be included in daily nutrition by increasing the production amount.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • Investigation of Correlation of Syrup Sugar Content with Colony Traits and
           Syrup Consumption in Bumblebee

    • Authors: Ayhan GÖSTERİT ; Cengiz ERKAN
      Abstract: This study was carried out to research the effects of feeding with syrup containing different amount of sugar on egg laying and colony foundation success and other colony development traits in bumblebees. For this purpose, 80 Bombus terrestris queens, which hibernated and were got ready to egg laying were used. Queens were randomly divided into four groups that each of them containing 20 queens. Four syrup containing different amount of sugar (35, 45, 55 and 65 brix degree) were tested in each group. Queens and colonies in all groups were also fed ad-libitum with the same fresh thawed pollen. According to results, syrup sugar content affected the colony foundation performance of queens in B. terrestris. However, syrup sugar content had no significant effect on the number of individuals produced and other colony development characteristics. In addition, the increase of sugar content of syrup reduced the amount of syrup consumption.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • The Effect of Nitrogen Fertilizer Applications on Some Nutrient Contents
           of Durum Wheat and Triticale in Different Development Stage

    • Authors: Esra ÖZBEK ; İ̇lknur AKGÜN
      Abstract: This research was carried out under Isparta conditions in 2018-2019 vegetation period. In the study, 2 durum wheat (Çeşit-1252 and Kızıltan-91) and 2 triticale (Ümran Hanım and Karma-2000) varieties were used. In this research; the effect of different nitrogen fertilizer applications (nitropower 33 and dinitroso) on some mineral contents (Fe, Zn, Phosphorus, K, Mg) in different development stages was investigated. This research was consisted of 24 plots (2 nitrogen applications x 4 varieties x 3 replications = 24) and carried out split split plot design with three replications. 550 seeds were sown on per square meter and 7 kg P2O5 and 5 kg / da N were applied to all plots during planting. The other half of the nitrogen was given at the beginning of stem elongation period. In research results, in the early harvest period while the values of Mg, P, Zn, Fe contents decreased, K ratio increased. In slow release fertilizer (Dinitroso) application some nutrient contents (Fe, P, K and Mg) have increased significantly.As a result; It has been determined that triticale can be used for freekeh purposes as it is harvested early and slow release fertilizer application has been determined to be effective on grain quality.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • Monitoring of Important Pest Populations by Colored Sticky Traps at Tomato
           Greenhouse in Afyonkarahisar Province

    • Authors: Rahime TANIK ; Yakup ÇELİKPENÇE , İ̇smail KARACA
      Abstract: It is known that there are a lot of pests and diseases that caused economic losses in the greenhouse growing. Among these pests, thrips, whiteflies, red mites, and aphids are potential pests that caused important losses. In recent years, tomato leaf miner extensively observed in the tomato growing areas is one of these pests too. Again, this pest in the tomatoes greenhouses chemical control methods are intensively used and this pest developed resistance to these chemicals. For this reason, many control methods are used against these pests and biotechnical methods are used for population monitoring of pests.In this study, the populations of tomato moth (Tuta absoluta Meyrick), greenhouse whitefly (Trialeurades vaporariorum, Westwood), and the western flower thrips (Frankliniella occidentalis (Pergande) were observed by using black, yellow, and blue sticky traps in an 80-acre geothermal greenhouse in Sandıklı district of Afyonkarahisar province and their population densities were determined.As a result, especially pheromone-supported black traps were found to be quite successful in attracting tomato moth. Also, greenhouse white fly attracted more of the yellow sticky traps while the western flower thrips attracted more of the blue traps.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • Volatile Oil Content and Compounds at Different Harvest Stages of Origanum
           minutiflorum O.Schwarz et. P.H. Davis

    • Authors: Hasan BAYDAR ; Fatime AVCU
      Abstract: This research was carried out to determine the volatile oil content and compounds at different harvesting stages of Origanum minutiflorum O. Schwarz et. P. H. Davis, which is an endemic species to Western Mediterranean flora and especially collected wild in Sütçüler region of Isparta province in Turkey. The aerial parts of the plants were collected at seven different stages as follows: early budding, late budding, early flowering, full flowering, late flowering, seed formation, and seed maturation. After leaves were dried at shade on the drying rack, the volatile oil contents were detected by hydro-Clevenger apparatus, and the volatile oil compounds were analyzed by GC/MS. From the first harvesting stage to the last harvesting stage, the leaf rate decreased from 76.9% to 64.2%, while the stem ratio increased from 23.1% to 35.8%. Although the highest volatile oil content was 3.0% in the plants harvested at full flowering stage, the lowest content was 1.6% in the plants harvested at the seed maturation stage. The rate of carvacrol, the main compound of the volatile oil, varied considerably with respect to harvest stages and was highest at the end of budding (82.78%) and lowest at seed maturation (50.83%).
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • The Effects of Different Nitrogen Doses on Seed Yield and Some
           Agricultural Characteristics of Phaselia (Phacelia tanacetifolia Bentham.)
           

    • Authors: Mevlüt TÜRK ; Mehmet ALAGÖZ
      Abstract: This research was conducted to investigate the effects of different nitrogen doses on the seed yield and some agricultural characteristics of phaselia (Phacelia tanacetifolia Bentham.) under Isparta ecological conditions in 2017 and 2018 years. This research was conducted in randomized block design with three replication. Five different nitrogen doses doses (0, 40, 80, 120 and 160 kg N ha-1) were used in the study. Plant height, first flowering time, 50% flowering time, number of raceme per plant, number of flower per raceme, 1000 seed weight and seed yield were investigated in this research. According to the results of the research, nitrogen doses had a significant effect on all properties. Nitrogen applications increased plant height, beginning of flowering period, 50% flowering, number of raceme per plant, number of flower per raceme, 1000 seed weight and seed yield. According to the two-year average results, in the province of Isparta and similar conditions, it is necessary to apply 120 and 160 kg nitrogen to obtain high seed yield in phaselia.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
  • Using Some Pesticides and Predatory Mite Neoseiulus californicus
           (McGregor) To Control Tetranychus urticae (Koch) On Bean Plant Under
           Greenhouse Conditions

    • Authors: Eda ÖNEL ; Recep AY
      Abstract: In this study, the use of predator mite Neoseiulus californicus (NC) together with some pesticides and separately in the control of Tetranychus urticae on bean in greenhouse was investigated. For this purpose, azadirachtin (Az), a biopesticide that is used extensively in greenhouse vegetable cultivation and prioritized in Integrated Pest Management programs, and spiromesifen (Sp), which has insecticide-acaricide properties, were used. In order to determine the effects of selected pesticides and NC on T. urticae, beans were planted in 1 m² parcels in a 200 m² greenhouse and the study was carried out according to randomized parcel design with 3 repats, and 6 characters as Az, Az+NC Sp, Sp+NC, NC and control. Two spotted spider mites were counted 1., 3., 5., 7., 14., 21. ve 28. days as live nymphs, egg and adult. In conclusion, T. urticae populations were successfully supressed according to the control trials which are established only Sp and Sp+NC combination.
      PubDate: Thu, 31 Dec 2020 00:00:00 +030
       
 
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