Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2025/r/munzur/6195
  Milk Production Curves Obtained from Cows Raised in Türkiye According to Years and Determination of Production Differences with the Help of Cluster Analysis and Friedman Test

  Çimen, Murat; Güven, Alper

  In the study, cluster analysis and Friedman tests were used to create curves for cow milk yields in Türkiye between 2010-2023 and to determine yield differences. For this purpose, milk yield records obtained from TUIK for the years in question were used. Since data before 2010 could not be accessed, 2010 was taken as the starting date. When the figures obtained in the study are examined, it is striking that the years generally show similar curves. These curves generally show a decrease from January to February, then an increase until May. Milk yield values, which reach their peak in May, decrease again until November. After this month, a new increase is noted in December. The months showing maximum and minimum values in the graphs of 2016 and 2017 are different. Therefore, different curves were obtained for these years compared to other years. When the curves of all years, cluster analysis and Friedman test results are examined in general, it can be said that the highest production was determined in May and the lowest production in November. The reason for these differences should be investigated for the years 2016 and 2017, when different curve results were obtained. The findings of this study are important in terms of providing preliminary information for those who will conduct model studies on milk production in our country. In addition to the evaluation of curve graphs, it has been seen from the research findings that different statistical techniques such as cluster analysis and Friedman test give effective results in this type of data. Both cluster analysis and Friedman test methods are test methods that can be used safely in new studies where curve graphs will be made.

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  AtıfOpenAlex2·TR Dizin2

  İncele
• MakaleAçık Erişim2025/r/munzur/1533
  Examination of Numerical Changes in Goat and Buffalo Population in TRB1 Region with Cluster Analysis; [Examination of Numerical Changes in Goat and Buffalo Population in TRB1 Region with Cluster Analysis]

  Çimen, Murat; Güven, Alper

  In this study, the effectiveness of using cluster analysis in determining the changes in the number of animals in the field of goat and buffalo breeding in the TRB1 region was tested. The numbers of goats and buffalos used in the research were obtained from the records kept by TÜİK between 2004 and 2023. According to the cluster analysis results, the numbers of buffalos in Elazığ and Bingöl provinces was found to be higher than Malatya and Tunceli provinces between 2004 and 2023. According to the specified years, while Bingöl province was found to be higher than other provinces in terms of the numbers of goats, it was determined that Malatya province had the lowest values. When analyzed by year, the numbers of buffalos in the provinces of the TRB1 region for the years 2004-2006 was found to be higher than the following years. In other words, it is understood that the numbers of buffalos has been decreasing in the TRB1 region since 2007. In the TRB1 region, goat numbers between 2012-2023 were found to be higher than those between 2004-2011. Accordingly, it can be said that there has been an increase in the number of goats in the TRB1 region since 2012. In the TRB1 region, appropriate regulations need to be made, taking into account the differences between provinces and years in terms of the numbers of buffalos and goats. In this study, it was seen that cluster analysis could be used successfully in determining the differences in animal numbers according to provinces and years.

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  AtıfOpenAlex3·TR Dizin3

  İncele
• MakaleAçık Erişim2024Scopus SJRQ2/r/munzur/4811
  Seed content and its oil composition in walnut cultivated from Tunceli, Türkiye

  Aydin, Caglar Mert; Güven, Alper

  The study is intended to shed light on walnut species cultivated in Tunceli province in 2022 and the oils produced from Juglans regia Fernor walnuts. Physicochemical properties of walnuts and fatty acid composition of the oils produced from the walnuts were identified. In addition, nutritional indexes and bioactive compounds of the oils were determined.Overall, physicochemical properties of the seeds belonging to walnuts significantly changed according to the variety. The major component in walnut seeds was found to be oil content. Saturated (SFA), monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acid ratios of the walnuts were varied according to the type of seed. Characterization of fatty acid composition in the oils from the walnuts was performed according to 6 different fatty acid levels. These fatty acids are myristic, palmitic, margaric, oleic, linoleic and linolenic acid. The oils have a refractive index being in the range of 1.4677-1.4694, the iodine value being in the range of 107-109 gms. TPC (total phenolic content) and DPPH antioxidant activity of the oils significantly changed according to the variety. TPC of the oils were found in the range of 0.33-1.53 mg GAE/g oil and DPPH antioxidant activity of the oils were in the range of 13.04-5.42 mg TE g(-1) oil. All walnut oils showed Newtonian flow behavior. The nutritional indexes including UI (Unsaturation index), IA (Atherogenicity index), IT (Thrombogenicity index) and HH (Hypocholesterolemic/hypercholesterolemic ratio) were determined to significantly change according to the variety, except for IT. It could be stated from the results that Nazimiye walnut seed oil has healthier effects on human health.

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  AtıfOpenAlex3

  İncele
• MakaleYalnız künye2016Scopus SJRQ1/r/munzur/4938
  Pulsed electric fields on phenylalanine ammonia lyase activity of tomato cell culture

  Gürsul, Isil; Gueven, Alper; Grohmann, Anne; Knorr, Dietrich

  Pulsed electric field (PEF), among numerous stresses, provides a large potential as an external stimulus to enhance secondary metabolite biosynthesis from plant cell cultures. PEF treatment was combined with the sub-culturing technique to increase phenylalanine ammonia lyase (PAL) activity, the key enzyme for secondary metabolite synthesis from tomato cell culture. In reference to the analysis, maximum accumulation of total phenolic (TP) compounds in the cells was determined as a function of stress reaction time (SRT). Also, PEF application increased PAL activity. PEF resulted in an increase in the porosity of the cell membrane, thus decreasing cell vitality. On the other hand, SRT decreased vitality, while increasing TP content. Sub-culturing enhanced the cell structure and improved the cell membrane permeability. PEF treatment potentially offers an alternative to other methods for increasing PAL activity in plant cell cultures. (C) 2016 Elsevier Ltd. All rights reserved.

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  AtıfWoS20·OpenAlex27

  İncele
• Derleme MakaleYalnız künye2014/r/munzur/5558
  Bitki doku kültürlerinde sekonder metabolit sentezi

  Güven, Alper; Gürsul, Işıl

  Bitki doku kültürlerinden elde edilen ikincil metabolitler, insan sağlığı açısından önemlidirler. Bu nedenle, son on yılda ikincil metabolitlerin sentezlenmesi ve fermentörlerde üretimi üzerindeki çalışmalar hız kazanmıştır. İkincil metabolitler biyoaktif özellikleri olan bileşenlerdir. Özellikle tıp ve eczacılık alanlarında kullanılırlar. Gıda endüstrisinde ise katkı maddesi, fonksiyonel gıda bileşeni veya besin takviyesi açısından önemlidirler. İkincil metabolitlerin bitkiler tarafından üretilmesi meteorolojik koşullara, coğrafi konuma ve yetiştirme koşullarına bağlıdır ve pek çok bitki ancak belirli mevsimlerde yetişip olgunlaşabilir. Bitki yerine bitki hücrelerinin uygun koşullarda biyoreaktörlerde üretilmesi bitkisel unsurların doğanın sunduğu parametrelerden bağımsız üretimini sağlar. Dolayısıyla, ikincil metabolitlerin tam bitkiden bağımsız üretimi piyasaya arzda süreklilik sağlar, üretim verimini artırır ve ikincil metabolitler belirli spesifikasyonlara sahip endüstriyel ürünler niteliğine kavuşur. Bitkilerin totipotensi özelliği, bir bitki hücresinden organizmanın üretilebilmesine olanak sağlar. Bitki doku kültürleri hayvan dokularıyla karşılaştırıldığında totipotensi özelliğinden dolayı hedef alınan metabolitler daha çok ve daha hızlı üretilebilirler. Ancak, bitki doku kültürlerinin ikincil metabolit sentezlediği mekanizmalar tamamen bilinmemektedir. İkincil metabolit üretimi ile ilgili bilimsel çalışmaların çoğu laboratuar ölçeği ile sınırlı kalmıştır. Biyoreaktörlerde bitki doku kültürlerinden ikincil metabolit üretimi tarıma dayalı endüstrinin katma değer açısından çok önemli bir unsuru olmaya adaydır. Burada, bu konuda bilimsel çalışma yapmayı hedeşeyenler için bitki doku kültürlerinin gelişim ve ikincil metabolizmalarını etkileyen unsurlarla bitki doku hücrelerinde ikincil metabolizmayı etkileyen stres mekanizmaları ve stres sonucu bitki doku kültürünün uğradığı değişimler özetlenmiştir.

  AtıfTR Dizin11

  İncele
• MakaleYalnız künye2013Scopus SJRQ1/r/munzur/4017
  Extrusion Cooking of Lentil Flour (Lens Culinaris-Red)-Corn Starch-Corn Oil Mixtures

  Dogan, H.; Gueven, A.; Hicsasmaz, Z.

  An expanded food product was obtained from lentil flourcorn starchcorn oil mixtures by extrusion cooking. Effects of protein, lipid, and moisture contents of the feed mixture; cooking temperature and screw speed on starch gelatinization; protein insolubility; and lipid complexation were investigated. Effects of these functional properties on expansion ratio, cell size distribution, and cutting strength were assessed. Optimum feed composition was 67% lentil flour, 30% corn starch, and 3% corn oil (db). This mixture was processed at 15% moisture content and 178 degrees C temperature. Expansion ratio was 3.7 and degree of gelatinization was 0.70.

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  AtıfWoS20·OpenAlex29

  İncele
• MakaleAçık Erişim2013Scopus SJRQ2/r/munzur/4727
  Chemical fingerprints of Raki: a traditional distilled alcoholic beverage

  Gueven, Alper

  Fourteen brands of commercial Raki samples were analysed chemically and compared with two samples produced in a local distillery, according to traditional methods, to determine whether the raw materials ( grape or raisin) and distillation practices result in distinguishable chemical fingerprints in the final product. The samples were analysed with respect to the content of trans- anethol, methyl alcohol, ethyl alcohol, higher alcohols and other volatiles, using gas chromatography. Principal component analysis showed that chemometric analysis could be used to distinguish between traditional and flavoured Raki products. Copyright (C) 2013 The Institute of Brewing & Distilling

  AtıfWoS7·OpenAlex11

  İncele
• MakaleAçık Erişim2011Scopus SJRQ1/r/munzur/4893
  Geometric network simulation of high porosity foods

  Gueven, A.; Hicsasmaz, Z.

  Solid foods are formed of a network of air cells distributed within a solid matrix. Size of air cells and how they are interconnected influence moisture sorption, thermal conductivity, aroma retention and texture of cellular foods. Available geometric pore structure models widely used in petroleum reservoir engineering, soil science, and catalysis are for low porosity (<= 0.4) materials. However, food materials generally have higher porosities (0.5-0.9). Microstructure of cookie (porosity = 0.54) and bread (porosity = 0.90) samples were simulated using the one-dimensional (1-D) corrugated pore model. Model parameters were: Unit cell dimensions; number of capillary segments, number of diameter sub-ranges, geometric placement of capillary segments in the unit cell; capillary segment length, and the seed number in random number generation. Accurate simulation of porosity depended on number of corrugated pores, and thus the number of diameter sub-ranges in the unit cell. For the cookie sample, a cubic unit cell that was able to accommodate more than a single capillary segment in a unit square and 3 diameter sub-ranges gave realistic results. Simulation of the bread crumb required a similar cubic unit cell arrangement with 12 diameter sub-ranges. (C) 2011 Elsevier Inc. All rights reserved.

  AtıfWoS3·OpenAlex4

  İncele
• MakaleYalnız künye2011Scopus SJRQ1/r/munzur/4686
  Isoflavonoid production by soy plant callus suspension culture

  Gueven, Alper; Knorr, Dietrich

  Production of aglycone type isoflavonoids, Genistein and Daidzein, and p-glycosidic type isoflavonoids, Genistin and Daidzin, by the soy plant callus suspension culture was investigated in a batch system. Genistein and Daidzein concentrations increased during the exponential growth phase of the biomass. Genistin and Daidzin concentrations were not directly related with biomass production. Methyl jasmonate addition to the growth medium (0.1 kg/m(3)) was found to increase isoflavonoid biosynthesis by 5-6 times. Isoflavonoid production in the 7 days old culture increased with pulsed electric field (PEF) application at 1.6 kV, and aglycone forms were influenced to a greater extent. (C) 2010 Elsevier Ltd. All rights reserved.

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  AtıfWoS45·OpenAlex69

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