Person: ALİBAŞ, İLKNUR
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ALİBAŞ
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İLKNUR
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Publication Influence of drying methods on the nutrients, protein content and vitamin profile of basil leaves(Elsevier, 2021-03-01) Alibaş, İlknur; Yilmaz, Aslıhan; Aşık, Bülent Barış; Erdogan, Hilal; ALİBAŞ, İLKNUR; YILMAZ, ASLIHAN; AŞIK, BARIŞ BÜLENT; 0000-0002-1898-8390; 0000-0002-4913-905X; 0000-0002-0387-2600; AAP-5834-2020; AAY-2088-2021; AAH-4263-2021In this study, basil leaves were dried using natural, microwave-, and convective-drying methods from an initial moisture content of 90.90 +/- 0.1 % to a final one of 8.21 +/- 0.12 %. The natural drying was done in a controlled room at a temperature of 25 +/- 1 degrees C and relative humidity of 60 +/- 5 %. The microwave-drying processes were performed using 100, 300, 500, 700, and 900 W microwave output powers, while 50 degrees C was used in convective-drying. The drying periods of different drying methods lasted between 16.5 and 1620 min. Consequently, the best drying method regarding drying period, energy consumption, protein amount, macronutrients (Cu, Zn, Fe, Mn and B), micronutrients (Cu, Zn, Fe, Mn and B), water-soluble vitamins (ascorbic acid, Vitamin B3 and Vitamin B6), fat-soluble vitamins (beta-carotene, Vitamin E, and Vitamin K), color parameters (L, a, b, C and alpha) and chlorophyll concentration was determined to be microwave-drying at 700 W.Publication The influence of short, medium, and long duration common dehydration methods on total protein, nutrients, vitamins, and carotenoids of rosehip fruit (rosa canina l.)(Academic Press Inc Elsevier Science, 2023-09-04) Alibaş, İlknur; ALİBAŞ, İLKNUR; Günaydın, Seda; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyoistatistik Mühendisliği Bölümü.; 0000-0002-1898-8390This study focused on the change in the quality parameters of rosehip fruits by different drying methods selected in a broad spectrum ranging from very long to concise duration. While natural and convective drying methods had a very long duration, with 9360 and 1080 min, respectively, microwave drying at 100 W had a relatively long duration, with 364 min. Microwave drying at 300 and 500 W represented medium-duration drying methods with 162 and 77 min; however, 700 and 1000 W were referred to as short-duration drying methods with 45 and 21 min. Among the drying methods, the highest concentrations of K, Mg, Na, Fe, total protein, ascorbic acid, niacin, and pantothenic acid were obtained with 10730, 1867, 446, 27.5, 53596, 10590, 63.1, and 35.1 mg/kg at 500 W, defined as a short duration method. For P, Ca, Cu, Mn, Zn, thiamin, pyridoxine, beta-carotene, tocopherol, lycopene, lutein, and zeaxanthin, 700 W, that is the concise duration technique, was the closest drying method to fresh samples with 1382, 6480, 4.19, 76.3, 8.09, 0.78, 75.3, 238, 278, 60.1, and 17.5 mg/kg, respectively. Unlike short-duration methods, natural drying, convective drying at 50 degrees C, and microwave drying at 100 W caused extreme decreases for all biochemical parameters. Consequently, microwave drying at 500 and 700 W was highly convenient for maintaining the quality parameters at the maximum level and saving time in drying the rose hips, which took a short time to harvest.Publication An investigation of engine and fuel injection system performance in an agricultural tractor operating with b20 biofuel(Taylor & Francis Inc, 2022-09-14) Düzgüner, Ender; Ulusoy, Yahya; ULUSOY, YAHYA; Alibaş, İlknur; ALİBAŞ, İLKNUR; Bolat, Alper; Alibaş, Kamil; ALİBAŞ, KAMİL; 0000-0003-0170-8038; 0000-0002-1898-8390; 0000-0003-2658-3905In this study, two different 55-kW powered agricultural tractors of the same make and model were operated for 1000 h under similar field conditions, one using diesel fuel (DF) and the other a fuel blend of 20% biodiesel-80% diesel (B20). By the end of 1000 h of operation, the performance values of the B20 fuel were determined to be 3% lower than for the DF. Although the values of CO (40%), HC (40%), and PM (46%) were lower than those of DF, the NOx (7%) was determined to be higher, as expected. Each injector needle and nozzle tip was examined in terms of a functional evaluation via visual inspection, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX). According to the analyses, the B20 fuel blend C content was determined to be 73.47% and its O content 23.34%, with the quantity of the other elements lower than 1%. Similarly, for DF, the C content was determined to be 50.49% and that of O 19.95%, with the other elements in trace amounts. Furthermore, Fourier-transform infrared spectroscopy (FTIR) spectral analysis was used to examine the deposits on the injector nozzle tips and needles. Polyisobutylene succinimide (PIBSI) and inorganic components were observed on the injector needles, whereas aging products and inorganic components were seen on the injector nozzle tips. No significant difference was found between the results of the DF and B20 fuels in terms of injector nozzle function.Publication GIS mapping of biogas potential from animal wastes in Bursa, Turkey(Chinese Acad Agricultural Engineering, 2015-02-01) Özsoy, Gökhan; Alibaş, İlknur; ÖZSOY, GÖKHAN; ALİBAŞ, İLKNUR; Uludağ Üniversitesi/Ziraat Fakültesi/Toprak Bilimi ve Bitki Besleme Bölümü; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0002-4421-7936; 0000-0002-1898-8390; AAF-5336-2019; AAH-4263-2021This paper introduces biogas potential of animal waste in Bursa, an important agricultural, industrial and tourism centre in northwest Turkey. This research has focused on Bursa's biogas potential from animal wastes. The potential quantity of electric energy, the potential amount of biogas as well as potential bio-electric energy per capita to be obtained from animal wastes were studied. If the evaluation of biogas potential is conducted thoroughly, 1.12% of the electricity consumption of Bursa can be met with the conversion of biogas from animal wastes into electricity. This study also revealed that the power for 95% of street lighting, approximately twofold of the electricity consumed in official apartments and all of the agricultural irrigation operations can be provided with electrical energy obtained from biogas obtained from animal wastes in Bursa. In addition, the research efficiency was improved by creating thematic maps in GIS, which enabled differences in data among the districts to be observed more clearly.Publication Effect of drying methods and pre-treatments on bioactive potential of persimmon ( diospyros kaki l.)(Springer, 2023-12-28) Yıldız, Elif; YILDIZ, ELİF; Yılmaz, Aslıhan; YILMAZ, ASLIHAN; Gürbü, Ozan; Alibaş, İlknur; ALİBAŞ, İLKNUR; GÜRBÜZ, OZAN; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyoistatistik Mühendisliği Bölümü.; 0000-0003-1356-9012; 0000-0002-4913-905X; 0000-0002-1898-8390; AAY-2088-2021In this research, persimmon samples (sliced, pureed) were dehydrated by convective (50 and 100 degrees C) and microwave (100 W) drying techniques with different pre-treatment combinations of sugar addition (25%) and blanching (100 degrees C, 5 min). Each pre-treatment consisting of sugar addition, slicing, and blanching resulted in a significant increase in color parameters compared to unpretreated samples. Color parameters measured at low drying temperatures were lower than high ones. Also, 100 W dried samples were higher in total anthocyanin content, and the pureed samples were 24.80% higher than sliced ones. The bioactive potential was evaluated regarding extractable, hydrolysable, and bioaccessible phenolic fractions by total phenolic content and ABTS (2,2 '-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid), DPPH (2,2-diphenyl-1-picrylhydrazyl) and CUPRAC (Cupric Reducing Antioxidant Capacity) antioxidant capacity assays. (i) 50 degrees C drying prevailed on drying at 100 degrees C and 100 W, especially in terms of extractable phenolic fractions and bioaccessible phenolic fractions; (ii) Sliced samples were higher for EPF and BPF, while pureed ones were higher in hydrolysable phenolic fractions; (iii) Blanched samples were relatively higher than unblanched ones in total phenolic content. For antioxidant capacity assays, extractable phenolic fractions were higher in blanched samples and bioaccessible phenolic fractions in unblanched ones (TEAC(ABTS), TEAC(CUPRAC)). (iv) Sugar addition negatively affected the bioactive potential in persimmon samples; no-sugar-added samples were higher, especially in bioaccessible phenolic fractions (p < 0.01; Total phenolic content, TEAC(ABTS,) TEAC(CUPRAC)). (v) The CUPRAC assay was the most appropriate method due to providing a view of more statistical distinction by picturing the same potential.Publication Utilizing of the common dehydrating techniques to obtain maximum benefit from the protein and mineral composition of rosemary leaves for spice and herbal tea production(Springer, 2022-08-16) Yılmaz, Aslıhan; Alibaş, İlknur; YILMAZ, ASLIHAN; ALİBAŞ, İLKNUR; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0002-4913-905X; 0000-0002-1898-8390; AAY-2088-2021; AAH-4263-2021In the study, we examined in detail the effect of dehydrating using natural drying in the shade, convection drying, and microwave drying, which are the most widely used techniques, especially for tea and spices, both in practice and in theory, on the protein, and mineral composition of rosemary leaves. Also, we determined the color parameters, which are the reason for the selection because it creates the allure for spices. In microwave drying at 600 W, we obtained results close to fresh rosemary in all color parameters, especially brightness and greenness. Although natural drying, which does not have any energy and investment costs, is the second-best method in terms of color, 50 degrees C, which is the most common drying technique in the market, caused significant color losses affecting the commercial value of the product. We reached the closest protein and P, Ca, Mg, Fe, Zn, Mn, and contents to fresh products in dried ones at 600 W. In contrast, in K only, the highest measurement was at 200 W. Strikingly, we observed dramatic losses reducing the benefit obtained from the product regarding protein and almost all nutrients in both convective and natural drying techniques, the most common methods in practice.Publication The impact of drying methods on quality parameters of purple basil leaves(Wiley, 2021-06-01) Yılmaz, Aslıhan; Alibaş, İlknur; YILMAZ, ASLIHAN; ALİBAŞ, İLKNUR; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0002-4913-905X; 0000-0002-1898-8390; AAY-2088-2021; AAH-4263-2021Purple basil leaves dried with natural drying, which was the traditional method, convective drying at 50celcius, which was the most common method, and microwave drying at 200, 600, and 1,000 W, which were low, medium, and high powers. The drying processes lasted 4,320, 195, 48, 25, and 14 min for natural, 50celcius, 200, 600, and 1,000 W, respectively. The most convenient color parameters and chlorophyll concentration to the fresh product were obtained at natural drying. While all drying methods were very close to fresh products regarding protein content; natural drying, 50celcius, and 1,000 W were found to have the highest concentration regarding P and K. Contrarily, 200 and 600 W were suitable for Ca and Mg conservation. The drying methods in which Na, Fe, Cu, Mn, and Zn reached the maximum were natural, 1,000, 600, 200 W, and 50celcius, respectively.Novelty impact statement This study is the first and merely study in the literature that examines the effect of drying methods on color parameters, nutrients, and protein content of purple basil leaves. In this respect, the study constitutes a profile in terms of revealing the nutritional aspect of dried purple basil.Publication Influence of the drying methods on color, vitamin C, anthocyanin, phenolic compounds, antioxidant activity, and in vitro bioaccessibility of blueberry fruits(Elsevier, 2021-06-11) Zia, Mahrukh Parveez; Alibaş, İlknur; Zia, Mahrukh Parveez; ALİBAŞ, İLKNUR; Bursa Uludağ Üniversitesi/Fen Bilimleri Enstitüsü/Biyosistem Mühendisliği Anabilim Dalı; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0003-4177-243X; 0000-0002-1898-8390; GCX-1534-2022; AAH-4263-2021In this study, blueberry fruit was dried using different thin-layer drying methods, namely, natural drying, microwave drying, convective drying, and combined microwave-convective drying. The moisture content of blueberries initially at 84.76 +/- 0.20% w. b. was reduced to 10.03 +/- 0.09% w. b. Although the drying time ranged from 340 to 3540 min in convective drying, this period was completed between 64 and 198 min in microwave drying. Also, the natural drying period continued for 22 days. It was determined that the convective drying, which was completed for the longest time, also caused the most energy consumption compared to other drying methods.The color parameters closest to fresh blueberries were obtained at 50 degrees C, 70 degrees C, 90 degrees C at convective drying, and 300 and 500 W in microwave drying. The study concludes that blueberries show a high antioxidant capacity and comprise various amounts of polyphenols compounds. Moreover, for the total antioxidant capacity, CUPRAC is the most suitable method. The anthocyanin and vitamin C content also showed high values for blueberries. In general, it was determined that the best drying method in terms of color parameters, antioxidant capacity, anthocyanin content, and ascorbic acid content was the microwave drying method at 300 W with drying time at 82 min and 500 W with drying time at 64 min.Publication The effect of moisture content on physical, mechanical and rheological properties of soybean (Glycine max cv. ATAEM-II) seed(Agricultural Research Communication Centre, 2015-06-01) Alibaş, İlknur; Köksal, Nezihe; ALİBAŞ, İLKNUR; Köksal, Nezihe; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0002-1898-8390; AAH-4263-2021; CZS-7460-2022Some physical, mechanical and rheological properties of soybean seed (Glycine max cv. ATAEM-II) were identified at moisture content of 8.02 +/-(0.03), 12.08 +/-(0.12), 16.07 +/-(0.11), 20.11 +/-(0.16) and 24.05 +/-(0.09)% w.b. From initial moisture content with 8.02% to final moisture content with 24.05%, the average length, width, and thickness of seed increased by 11.93, 10.64 and 10.47%, respectively. Arithmetic and geometric mean diameters, surface area, terminal velocity, angle of repose, static friction angles and coefficients on aluminum, stainless steel, galvanized iron, rubber, glass and plywood plates increased with increasing moisture content whereas other all properties such as true and bulk densities, porosity, shpericity, aspect ratio, rupture force, hardness, elastic modulus, Poissons ratio and energy decreased with increasing moisture content. The minimum friction was determined by glass, followed by aluminum, stainless steel, galvanized iron, plywood and rubber plates at all moisture contents. Elastic Modulus ranged between 118.83 and 100.91N mm-2 at initial and final moisture content, respectively. At the initial and final moisture content, the Poisson ratio changed between 0.527 and 0.262, respectively. The best germination ratio with 98.04% was identified at the 20.11% moisture content while the shortest germination duration with 12.96 days was determined at the 8.02% moisture content.Publication Determination of physical, mechanical, and structural seed properties of pepper cultivars(Polish Acad Sciences, 2015-01-01) Alibaş, İlknur; Köksal, Nezihe; ALİBAŞ, İLKNUR; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; 0000-0002-1898-8390; AAH-4263-2021The aim of the present study was to determine various physical, mechanical, and structural characteristics of seed of pepper cultivars Yaglik Kapya, Demre Sivri, Yalova Carliston, Kandil Dolma, and Cin Sus Yediveren, which are grown extensively in Turkey, with initial moisture content ranging between 7.03 and 7.21% (w.b.). Width, length, and thickness were found to be in the range of 3.00-3.72, 3.43-4.40, and 0.66-0.82 mm, respectively. It was revealed that sphericity of the seeds of Yaglik Kapya, Demre Sivri, Yalova Carliston, Kandil Dolma, and Cin Sus Yediveren were 51, 57, 56, 51 and 57%, respectively. In terms of the roundness which ranges between 76 and 85% depending on pepper cultivars. The aspect ratio of Yaglik Kapya, Demre Sivri, Yalova Carliston, Kandil Dolma, and Cin Sus Yediveren were determined to be 84.60, 88.04, 94.43, 85.55, and 87.67%, respectively. It was also noted that the porosity of the pepper seeds was in the range of 44.94-49.61%. Besides, we found that as the weight of pepper seeds increased, their terminal velocity increased accordingly, and thus terminal velocities were found to be 2.87-4.66 m s(-1). In the current study, the static friction angle and coefficients of the cultivars were determined by means of six different plates including aluminium, stainless steel, galvanized iron, rubber, glass, and plywood. The plywood plate was found to be the least slippery; consequently, the static friction angle and coefficient were determined to be the highest for the plywood plate.