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MICROBIOLOGICAL ASSESSMENT OF ICE CREAM SOLD AT THE TERRITORY OF BELGRADE 在贝尔格莱德境内出售的冰淇淋的微生物评估
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.341sr
R. Savic – Radovanovic, S. Janićijević, Jelena Aleksić Radojković
The aim of this research was to evaluate the microbiological quality of ice cream sold at catering facilities-restaurants, cake shops and bakeries on the territory of Belgrade. The material consisted of 40 samples of ice cream collected during monitoring in 2021 and 2022. Microbiological analyses were carried out according to the Rulebook on General and Special Conditions of Food Hygiene at any Stage of Production, Processing and Trade („Official Gazette of the RS„, No. 72/2010, 62/2018). ISO standard methods for detection of microorganisms in ice cream samples were applied. Out of 40 samples, all were in accordance to the safety criteria, as Salmonella spp. were not detected in any of tested samples. Four samples (10%) did not meet the hygiene criteria in production processas more than 100 CFU/g Enterobacteriaceae were detected. Out of 4 samples, one sample of ice cream was produced in the small craft facility and 3 samples were from mobile ice cream vending machines. It can be concluded that examined samples of ice cream from catering facilities in the area of ​​Belgrade were safe for consuption, since they met the safety criteria prescribed by the applicable legislative. The improvement of hygienic measures during the production process of ice cream in small craft fecilities and vendom mobile mashines was ordered.
本研究的目的是评估在贝尔格莱德境内的餐饮设施(餐馆、蛋糕店和面包店)销售的冰淇淋的微生物质量。这些材料包括在2021年和2022年监测期间收集的40个冰淇淋样本。微生物分析根据《生产、加工和贸易任何阶段食品卫生一般和特殊条件规则手册》(“RS官方公报”,第72/2010号,62/2018号)进行。应用ISO标准方法检测冰淇淋样品中的微生物。在40个样本中,所有样本均符合安全标准,因为在任何测试样本中均未检测到沙门氏菌。不符合卫生标准的样品4份(10%),生产过程中检出的肠杆菌科细菌均大于100 CFU/g。在4个样品中,一个冰淇淋样品是在小型工艺设施中生产的,另外3个样品来自移动冰淇淋自动售货机。可以得出的结论是,从贝尔格莱德地区的餐饮设施所检查的冰淇淋样品可以安全食用,因为它们符合适用立法规定的安全标准。要求在小型工艺设施和随机移动机器中改进冰淇淋生产过程中的卫生措施。
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引用次数: 0
ANTIOXIDANT PROPERTIES AND BIOLOGICAL ACTIVITY OF FRUIT WINES 果酒的抗氧化特性及生物活性
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.405p
A. Petrovic, Ivana Plavšić-Janjatović, N. Lisov, Maria Cebela, U. Čakar, I. Stanković, B. Đorđević
The fruit wines from blueberry were made by microvinification procedure. Wines were produced in the absence or presence of sugar and/or enzymatic preparation glycosidase (EPG). Selected phenolic acids were quantified using UPLC/MS-MS analysis. Total phenolic content (TPC) was determined by the Folin-Ciocalteu method. Also, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing ability of plasma (FRAP) methods were applied. The α-glucosidase inhibitory activity of blueberry wines was also investigated. Wines made with addition of sugar and EPG showed the best results. Phenolic profile and biological activity of blueberry wine depended from microvinification procedure which was used in the production.
采用微发酵法制备了蓝莓果酒。葡萄酒是在没有或存在糖和/或酶制剂糖苷酶(EPG)的情况下生产的。采用UPLC/MS-MS对所选酚酸进行定量分析。采用Folin-Ciocalteu法测定总酚含量(TPC)。此外,还应用了2,2-二苯基-1-苦味酰肼(DPPH)和血浆铁还原能力(FRAP)方法。并对蓝莓酒的α-葡萄糖苷酶抑制活性进行了研究。添加糖和EPG的葡萄酒效果最好。蓝莓酒的酚类特征和生物活性受其微酿酒工艺的影响。
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引用次数: 0
PHENOLIC CONTENT AND IN VITRO ANTIOXIDANT ACTIVITY OF BLACK MULBERRY („Morus Nigra L.“) FRUIT, JUICE AND POMACE 黑桑果实、果汁及果渣的酚类含量及体外抗氧化活性
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.473m
N. Matić, Nevena Barać, Danka Mitrović, Ivana Sredović Ignjatović, M. Barać
Black mulberry fruits are a good source of valuable nutrients and a wide range of bioactive compounds including polyphenols, flavonols, polysaccharides and anthocyanins. To investigate the possible conversion of mulberry pomace as by-product into highly-valuable food additive, in this work the distribution of the total phenols, flavanols, monomeric and polymeric anthocyanins during black mulberry juice production was characterized. Also, the antioxidant properties (antioxidant capacity and ferric reducing power) of the obtained juice as well as water and methanol extracts of black mulberry pomace were detected. The results of this investigation clearly suggested that mulberry pomace is promising nutritional by-product for consindering in fuctional foods devolopment.
黑桑葚果实是有价值的营养物质和多种生物活性化合物的良好来源,包括多酚、黄酮醇、多糖和花青素。为探讨副产物桑椹渣转化为高价值食品添加剂的可能性,对黑桑椹汁生产过程中总酚、黄烷醇、单体和聚合花青素的分布进行了表征。并对所得黑桑果渣汁、水提物和甲醇提物的抗氧化性能(抗氧化能力和还原铁的能力)进行了检测。研究结果表明,桑果渣是一种很有发展前景的营养副产物,可用于功能性食品的开发。
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引用次数: 0
CROP WEEDS DETECTION USING NEURAL NETWORK MODELS 基于神经网络模型的农作物杂草检测
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.093m
D. Marković, U. Pešović, D. Tomić, V. Stevović
Weeds are one of the most important factors affecting agricultural production. Environmental pollution caused by the application of herbicides over the entire agricultural land surface is becoming more and more obvious. Accurately distinguishing crops from weeds by machines and achieving precise treatment of only weed species is one possibility to reduce the use of herbicides. However, precise treatment depends on the precise identification and location of weeds and cultivated plants. The aim of the work was to describe and point out the importance of deep learning models for the detection and classification of weeds, in order to enhance their application in real conditions.
杂草是影响农业生产的重要因素之一。除草剂对整个农业地表造成的环境污染越来越明显。通过机器准确地区分作物和杂草,并实现对杂草的精确处理,是减少除草剂使用的一种可能。然而,精确的处理取决于对杂草和栽培植物的精确识别和定位。该工作的目的是描述和指出深度学习模型对杂草检测和分类的重要性,以增强其在实际条件下的应用。
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引用次数: 0
INFLUENCE OF MACERATION CONDITIONS ON THE ANTIOXIDATIVE PROPERTIES OF VRANAC AND MERLOT RED WINES 浸渍条件对vranac和merlot红葡萄酒抗氧化性能的影响
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.167jc
T. Jovanović-Cvetković, A. Savić, Danijela Starčević, B. Pašalić
Maceration is the basic process by which red and white wine production technologies differ from each other, and thanks to this process, red wines acquire most of their characteristics. Mainly during maceration, phenolic compounds, which are powerful antioxidants, are extracted from the solid parts of the berries. Depending on the variety, it is necessary to apply different maceration regimes. The aim of this research was to determine the influence of the maceration temperature and duration on the antioxidant properties of red wines of the Vranac and Merlot varieties. The research was carried out in 2021, where maceration procedures were applied for 6 and 12 days, at temperatures of 16 and 25°C. When macerated for 6 days at 25°C, the wines of both varieties had the lowest total phenolic content (Vranac 7.27 g/l; Merlot 7.15 g/l), but the highest total free anthocyanin content (Vranac 841.04 mg/l; Merlot 572.85 mg/l). Higher antioxidant activity of Vranac variety wines was obtained at shorter maceration (6 days), and Merlot variety wines at longer maceration (12 days).
浸渍是红葡萄酒和白葡萄酒生产技术相互区别的基本过程,由于这个过程,红葡萄酒获得了它们的大部分特征。主要是在浸渍过程中,从浆果的固体部分提取出强大的抗氧化剂酚类化合物。根据品种的不同,有必要采用不同的浸渍制度。本研究的目的是确定浸渍温度和浸渍时间对瓦拉纳克和梅洛红葡萄酒抗氧化性能的影响。该研究于2021年进行,在16°C和25°C的温度下进行了6天和12天的浸渍程序。25°C浸泡6天后,两个品种的葡萄酒总酚含量最低(Vranac 7.27 g/l;梅洛7.15 g/l),但总游离花青素含量最高(Vranac 841.04 mg/l;梅洛572.85毫克/升)。Vranac品种葡萄酒在较短的浸渍时间(6天)获得较高的抗氧化活性,梅洛品种葡萄酒在较长的浸渍时间(12天)获得较高的抗氧化活性。
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引用次数: 0
ASSESSMENT OF GROUNDWATER QUALITY FOR IRRIGATION IN NORTHERN VOJVODINA 伏伊伏丁那北部灌溉地下水水质评价
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.241v
M. Vranešević, A. Bezdan, B. Blagojević, R. Savić, Radoš Zemunac, G. Šekularac, M. Aksić
Agriculture is one of the largest consumers of water and the importance of its quality need to be usable, because the consequences of applying water of unsuitable quality are permanent and far-reaching. Assessment of groundwater usability should be performed according to available parameters. For the needs of classifications, water parameters were analyzed all cations, anions, total dissolved salt and electrical conductivity. According to all the classifications, the analyzed groundwater can be a good source of water for irrigation in terms of its quality, but with control and appropriate measures.
农业是最大的用水户之一,水的质量必须是可用的,因为使用质量不合适的水的后果是永久性和深远的。应根据现有参数进行地下水可利用性评价。为了分类的需要,分析了水的各项参数,包括阳离子、阴离子、总溶解盐和电导率。综合各分类结果,分析所得地下水水质可作为良好的灌溉水源,但需加以控制和采取相应措施。
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引用次数: 0
NUTRITIONAL VALUE AND MICROBIOLOGICAL QUALITY OF VARIOUS TYPES OF BREAD 不同类型面包的营养价值和微生物品质
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.381r
Dobrila Ranđelović, S. Bogdanović, Ivana D. Zlatković
For centuries, bread has been the world population's basic alimentary item. It is a bakery product made from the dough that has undergone the process of kneading, shaping, fermentation and baking. The purpose of this work is to determine the nutritional values and the microbiological quality of bread made from different types of flour. Energy value of bread was calculated based on the content of carbohydrates, proteins and fats. Microbiological quality control included bacteria that cause food spoilage, namely Salmonella spp., Listeria monocytogenes, Enteriobacteriaceae, Bacillus cereus, as well as molds and yeasts. The results of examining the energy value parameters, which are presented in our work, are in accordance with the Regulations concerning methods of physical and chemical analysis for testing quality control of grains, mill and bakery products, pasta and quickfrozen dough products. All tested microbiological parameters of white and wholemeal bread, as well as buckwheat and rye flour bread, were within the acceptable values, while corn flour bread had a slightly higher content of yeasts and molds than the prescribed standard.
几个世纪以来,面包一直是世界人口的基本食物。它是一种由面团经过揉捏、定型、发酵和烘烤过程制成的烘焙产品。本研究的目的是测定由不同种类的面粉制成的面包的营养价值和微生物质量。面包的能量值是根据碳水化合物、蛋白质和脂肪的含量来计算的。微生物质量控制包括导致食物变质的细菌,即沙门氏菌、单核增生李斯特菌、肠杆菌科、蜡样芽孢杆菌,以及霉菌和酵母。我们在工作中提出的能量值参数的检测结果符合《谷物、面粉和烘焙产品、面食和速冻面团产品质量控制检测的理化分析方法规定》。白面包和全麦面包、荞麦面包和黑麦面包的微生物学指标均在可接受范围内,玉米粉面包的酵母和霉菌含量略高于规定标准。
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引用次数: 0
EFFECT OF PROTEASE ADDED IN FOOD AND SEX ON CHICKEN MEAT CLASESS 饲料和性别中添加蛋白酶对鸡肉等级的影响
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.223d
V. Dosković, S. Bogosavljević-Bošković, Z. Škrbić, B. Milosevic, M. Lukić, S. Rakonjac, V. Petričević
The effects of feeding low dietary crude protein with supplemental protease and sex on the weight and percent yields of individual meat classes in broiler chickens of hybrid Cobb 500 were investigated. A total of 300 day-old broiler chicks were fed with one of the following three experimental diets: control group (C), the experimental group I (E-I) contained 4% less crude protein than the control (C) and were supplemented with protease (Ronozyme Pro Act) at a concentration of 200mg/kg feed and the experimental group II (E-II) contained 6% less crude protein and were supplemented with protease (Ronozyme Pro Act) at a concentration of 300mg/kg feed. Supplementation of protease to diets had no significant effects on weights of individual meat classes (P>0.05), as well as the percentage of meat classes, and the only differences were manifested between E-I and E-II (P<0.05, female broilers from the E-I group were had a higher percentage of class I meat and a lower percentage of class III meat compared to females from the E-II group). The effect of sex was manifested in the weights of all meat classes and the percentage of class I meat and class III meat (P<0.05).
研究了饲粮中添加低粗蛋白质并添加蛋白酶和性对杂交科布500肉鸡体重和各肉类产量的影响。试验选用300日龄肉仔鸡饲喂3种试验饲粮:对照组(C)、试验I组(E-I)粗蛋白质含量比对照组(C)低4%,在饲粮中添加浓度为200mg/kg的蛋白酶(Ronozyme Pro Act),试验II组(E-II)粗蛋白质含量比对照组(C)低6%,在饲粮中添加浓度为300mg/kg的蛋白酶(Ronozyme Pro Act)。饲粮中添加蛋白酶对肉鸡各肉品质的重量和肉品质的比例无显著影响(P>0.05), E-I组与E-II组之间差异不显著(P<0.05, E-I组肉鸡的I类肉品比例高于E-II组,III类肉品比例低于E-II组)。性别的影响表现在各肉品质的重量以及I类和III类肉品的比例上(P<0.05)。
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引用次数: 0
APPLICATION OF QPCR FOR PLUM POX VIRUS DETECTION DURING CRYOTHERAPY QPCR在梅痘病毒冷冻检测中的应用
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.283j
D. Jevremović, B. Vasilijević, Tatjana Anđelić, T. Vujović
For the purpose of removing viruses from infected plant material, cryotherapy is a novel application of the plant cryopreservation technique. The use of various cryotherapy procedures and treatments necessitates the examination of cryo-treated material for the presence of the targeted pathogen in order to gauge the effectiveness of the therapy. In our study, we evaluated the efficiency of reverse transcription-polymerase chain reaction (RT-PCR) and qPCR (quantitative PCR) methods for the detection of plum pox virus (PPV) in cryo-treated material of plums ‘Belošljiva’ and ‘Crvena Ranka’. A qRCR assay showed higher sensitivity in comparison to conventional RT-PCR.
冷冻疗法是植物低温保存技术的一种新应用,目的是为了从受感染的植物材料中去除病毒。使用各种冷冻治疗程序和治疗需要检查冷冻处理过的材料,以确定目标病原体的存在,以便衡量治疗的有效性。在本研究中,我们评价了逆转录聚合酶链反应(RT-PCR)和定量PCR (qPCR)方法检测李痘病毒(PPV)在低温处理的李子母‘Belošljiva’和‘Crvena Ranka’中的效率。与传统RT-PCR相比,qRCR检测显示出更高的灵敏度。
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引用次数: 0
CONTENT OF POLYPHENOL COMPOUNDS IN THE DRY MATTER OF ITALIAN RYEGRASS 意大利黑麦草干物质中多酚类化合物的含量
Pub Date : 2023-03-01 DOI: 10.46793/sbt28.039m
J. Marković, Đ. Lazarević, V. Zornić
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引用次数: 1
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