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Результаты 161-170 из 280
Dehydration Kinetics and Infusion Attributes of Microwave Dried Olive Leaves
2018
Ömer Faruk Gamlı | Özge Süfer | Tülin Eker
Olive leaves have been catching consumers’ and researchers’ great interest because of benefits on human health. In this study, the olive leaves were dried by microwave method at different powers (52, 90, 167, 290, 347 W real effective power levels) and drying kinetics of olive leaves were examined to find the best mathematical model. Page model was the most suitable model rather than the others. Diffusion coefficients were ranged between 2.65×10-10 to 6.87×10-10 m2/s and an increment in power level promoted moisture diffusivities. Dried olive leaves were used to get leave tea and different infusion temperatures were investigated to recover the total polyphenols (mg GAE/kg) and radical scavenging activities (%). Rising in infusion temperature, especially at 100°C enhanced the extraction levels of polyphenols from leave tea. Olive leaves dried at 167 W had higher phenolic contents (2282.9 mg GAE/kg) among all samples.
Показать больше [+] Меньше [-]The Antibacterial Activities of Lavandula stoechas and Crepis sancta Leaf and Flower Against Mastitis Pathogens and Enzymatic and Non-Enzymatic Antioxidant Activities of The Extracts
2018
Nuray Ergün | Gülten Ökmen | Pınar Erdal | Pınar Erdal | Zafer Cantekin | Yaşar Ergün
The antibacterial and antioxidant activities of Lavandula stoechas and Crepis sancta extracts on subclinical mastitis bacteria in cows have not been reported to the present day. The aim of this work was to investigate of the antibacterial and antioxidant potential of methanol extract from L. stoechas and C. sancta. Methanol extracts were screened for antibacterial activity against mastitis pathogens. The antibacterial activity was tested using disc diffusion and broth dilution method. In addition, the plant extracts were tested against the stable DPPH (1,1-Diphenyl-2-picrylhydrazyl) free-radical. Additionally methanol extracts were screened for enzymatic antioxidant activity. The methanol extract of C. sancta showed maximum inhibition zone against S. aureus-18 (16 mm). MIC (minimum inhibition concentration) value was determined as 3250 µg/mL for test bacteria. The highest radical scavenging capacity (62 %) was obtained from the flower extracts of L. stoechas and the leaf extracts of C. sancta. The methanol extract of C. sancta displayed a strong antioxidant activity (trolox equivalent = 1.6 mM/g). It was determined that the activities of catalase (CAT) and ascorbate peroxidase (AP) enzymes were higher at the flowers of L. stoechas compared to the leaves. The extracts of L. stoechas and C. sancta leaf and flower have antibacterial and antioxidant potential against subclinic mastitis causative agent Staphylococci species.
Показать больше [+] Меньше [-]Effect of Pulsed Ultraviolet Light on Natural Microbial Load and Antioxidant Properties of Fresh Blueberries
2018
Senem Guner | Zeynal Topalcengiz
Blueberries have been drawn more attention in recent years for their antioxidant capacities and proposed health benefits. Pulsed ultraviolet (PUV) light is known for its disinfection effects on the surface of fresh fruits. This study’s aim was to examine the effects of PUV light on naturally present microbial load, antioxidant capacity, and antioxidant enzyme activity of fresh blueberries. Fresh blueberry samples were treated for 30, 60, 90, and 120 s. Samples were stabilized at 13 cm away from the PUV lamp before treatment. Total Aerobic Plate Count (TAPC) and yeast and mold count reduction were observed the highest in samples treated for 90 s, 1.97 and 1.27 log CFU/g, respectively. Antioxidant capacity levels were significantly different for treated samples for 60 and 90 s in FRAP analysis, whereas no differences were observed in results of DPPH analysis. Superoxide dismutase (SOD) activity as antioxidant enzyme had no difference, however, glutathione peroxidase (GPx) increased by 50% with PUV treatment for 120 s. PUV light treatment of fresh blueberries for 90 s was determined as ideal exposure time among tested time intervals of this study. PUV light illumination can generally enhance antioxidant capacity and antioxidant enzyme activity of fresh blueberries and decrease the population of natural microorganisms of fresh blueberries and similar small fruits.
Показать больше [+] Меньше [-]Effect of Storage Duration and Processing Parameters on Some Cooking Properties of Ofada Rice
2018
Oludare Olumuyiwa Adekoyeni | Adedola Sulaiman Adeboye
Effects of storage duration, soaking time and parboiling temperature on cooking properties (cooking time, water uptake ratio, solid loss, cooked kernel length, and amylose) of Ofada rice was determined and optimised using response surface methodology. Storage duration, soaking time and parboiling temperature were 1, 5, and 9 months; 1, 3, and 5 days; and 80, 100, and 120°C. Data were analysed by ANOVA and regression analysis. The cooking time ranged between 14-38 min, water uptake ratio (WUR) 2.51-4.61, solid loss 1.47-4.78%, cooked kernel length 6.32-11.90 and amylose 17.34-26.28%. There exist significant differences in the cooking properties. The coefficient R2 ranged between 0.97-0.75 which is a positive indicator of the model fitness. Storage duration and parboiling temperature influenced cooking except in solid loss and cooked kernel length respectively. Effect of soaking time was found prominent in WUR and solid loss. Optimum treatment for quality cooking properties are storage of paddy for 5 months, soaking for 18h and parboiling at 80°C to yield 20 min cooking time, 4.22 water uptake ratio, 4.11% solid loss, 10.58 mm cooked kernel length and 25.08% amylose. The validated experiment yielded 21.41 min, 3.99, 2.73%, 8.20 mm and 26.39% for cooking time, water uptake ratio, solid loss, cooked kernel length and amylose respectively.
Показать больше [+] Меньше [-]Advancement in the Feeding and Nutrition of Farm Animals of Bangladesh and a Panoramic View 2050
2018
Khan Shahidul Huque | Nazmul Huda
This article describes genesis and the advances of schooling, research and extension of animal nutrition science and practices in Bangladesh. It portrays sine qua non of the advancement of animal nutrition, fodder production and frontier knowledge of allied disciplines. Domestic growth of good practices and its global and regional competitive advantages are delineated for supporting the growing need of safe animal sourced food pillared with profit, people, planet and the ethics of sustainable production of farm animals. A vision of becoming world middle income country with a national population plateau of around 202.0 million and demographic shifts by 2050 may require the annual production of 130.0 and 27.0 thousand tons of manufactured dairy and beef feed furthering global trading competitions for feed ingredients. This competition may be minimized through the production and supply of domestic sourced unique quality feeds and value additions to roughages. Capacity enhancement in research, education and extension will boost socioeconomic and the production efficiency of farm animals and enhance sustainable growth of feed industry racing with regional and global competitions.
Показать больше [+] Меньше [-]Siyez Buğdayına (Triticum monococcum) Metal İşleme Sıvısı Etkilerinin ICP-OES Yöntemiyle Değerlendirilmesi
2018
Sefa Pekol
Atık metal işleme sıvısına maruz bırakılan siyez buğdayında metal birikim seviyeleri gövde ve kökte ICP-OES ölçümleri le ayrı ayrı belirlenmiştir. Kökte özellikle demir, manganez ve krom kontrol grubuna göre deneme gruplarında metal işleme sıvısının miktarına bağlı olarak iki katına kadar yükselmiştir. Gövdedeki demir, mangan ve alüminyum iki kat artmış, ayrıca çinko ve nikel de artış eğilimi gözlenmiştir. Siyez buğdayının büyümesi önemli derecede engellenmiştir. Metal işleme sıvısı oranı arttıkça bitkinin gelişimi azaldı, 1MS/20 su deneme grubunda bitki canlılığını kaybetmiştir. Ekosistemde yağmur suyu, yüzey suları ve akiferler için atık metal işleme sıvısı ciddi bir tehdit oluşturabilir.
Показать больше [+] Меньше [-]Analysis of the Socio-Economic Constraints of Small Ruminants’ Production in West Bank-Palestine
2018
Yahya Istaitih | Makbule Nisa Mencet Yelboga
This study analysed the socio-economic constraints facing small ruminants’ production in West Bank Palestine. Therefore, it investigated the sites of Al-thaheryia and Facuoa and included. From primary data collected from different sources, 170 small ruminants’ rearers have been randomly selected. Additionally, two workshops have been implemented to gather both quantitative and qualitative data through discussion and brainstorming. Descriptive statistics; frequency, percentage, mean, standard deviation, Chi-square test and T-test are used to shape the socioeconomic constraints facing by small ruminants rearers. The findings revealed a need for extension system to enhance small ruminants’ productivity.
Показать больше [+] Меньше [-]Fecundity of Morocco Dentex Dentex maroccanus Valenciennes, 1830 Distributed in Izmir Bay (Central Aegean Sea of Turkey)
2018
Burcu Taylan | Bahar Bayhan | Oğulcan Heral
In this study, the reproductive properties of the Dentex maroccanus species distributed in the Aegean Sea were determined. A total of 439 fish were collected during the period from December 2012 to March 2014 from the commercial fishers who seasonally hunt in the Foça-Mordoğan region (İzmir, Turkey) were examined. After the measurement of the total lengths and body and gonad weights of the fish samples in the laboratory, their sexes were identified, which revealed that 140 of the samples were male, 206 of the samples were female and 93 of the sample were undeterminated. The female:male ratio was 1.5:1. The 5-point maturity phase discrimination method developed by Holden and Raitt for maturity stages in 1974 was macroscopically examined for female and male fish specimens. A total of 16 ovaries, which were determined to be at the 3rd and 4th stages of maturity according to the method, were used to determine fecundity. The gonadosomatic index values that were calculated based on the seasons revealed that the reproductive period of the species was summer (2.87) and autumn (2.10). The first maturation length for the species was 13.4 cm. Estimates of total fecundity varied between 74252 and 201187 eggs (mean: 123263±44586). There was an exponential relationship between fecundity and total length as F = 10.643L3.111. The diameter of the mature eggs ranged from 0.49 mm to 0.67 mm (mean: 0.59±0.06 mm).
Показать больше [+] Меньше [-]Impacts of Macronutrients on Gene Expression: Recent Evidence to Understand Productive and Reproductive Performance of Livestock
2018
Md. Mahmodul Hasan Sohel | Yusuf Konca | Mehmet Ulas Cinar
In order to identify the effects of nutrients on gene expression and to assess the interactions between genes and nutrition by means of various cutting-edge technologies, the interdisciplinary branch ‘Nutrigenomics’ was created. Therefore, nutrigenomics corresponds to the use of knowledge and techniques of nutrition, genomics, transcriptomics, proteomics, epigenomics, and metabolomics to seek and explain the cross-talk between nutrition and genes in molecular level. Macronutrients are important dietary signals that control metabolic programming of cells and have important roles in maintaining cellular homeostasis by influencing specific gene expression. Recent advancements in molecular genetics studies, for instance, use of next-generation sequencing, microarray and qPCR array to investigate the expression of transcripts, genes, and miRNAs, has a crucial impact on understanding and quantitative measurement of the impact of dietary macronutrients on gene function. This review will shade a light on the interactions and mechanisms how the dietary source of macronutrients changes the expression of specific mRNA and miRNA. Furthermore, it will highlight the exciting recent findings in relation to animal performance characteristics which eventually help us to identify a dietary target to improve animal production.
Показать больше [+] Меньше [-]Kilis İli İçme Sularının Koliform Bakteri Yönünden İncelenmesi
2018
Ayşenur Özşavlı | Figen Şahin | Mehtap Sadak | Kıvılcım Çaktü Güler
Bu çalışmada, Kilis ili halka açık 6 farklı içme suyu kaynaklarında fekal kirlilik araştırılmıştır. Mevsimsel (Ekim, Ocak, Nisan ve Temmuz) olarak alınan örneklerde En Muhtemel Sayı yöntemi ile total koliform varlığı test edilmiştir. İçme suyu olarak kullanılan bu kaynaklarda tespit edilen toplam koliform sayısı 3-1100
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