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Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology最新文献

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Rapid detection of milk adulteration using Raman spectroscopy and statistical modelling 利用拉曼光谱和统计模型快速检测牛奶掺假
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.10
A. Becze, D. Simedru
Food adulteration has become a concern for consumers and food safety authorities. Milk is a commune adulterated food product, like melamine adulteration, which resulted in devastating effects, especially on young children. Because of the current fast paste economy, it is essential to develop equally fast analysis methods to ensure reliable and sensitive results quickly with little to no sample preparation. For that purpose, a Raman method was developed and Partial least squares regression (PLS) was applied in order to develop a model for adulterated goat milk detection. Minitab 17 software was used for the statistical modeling of data. Validation matrices were constructed using unadulterated goat milk and goat milk adulterated with cow milk in different proportions (0-50%). The prediction model had a correlation coefficient of 99.8 %.
食品掺假已成为消费者和食品安全当局关注的问题。牛奶是一种掺假食品,就像三聚氰胺一样,造成了毁灭性的影响,尤其是对幼儿。由于目前的快速粘贴经济,必须开发同样快速的分析方法,以确保快速可靠和敏感的结果,几乎没有样品制备。为此,开发了拉曼方法,并应用偏最小二乘回归(PLS)建立了掺假羊奶检测模型。采用Minitab 17软件对数据进行统计建模。采用不同比例(0-50%)的纯羊奶和掺入牛奶的羊奶构建验证矩阵。预测模型的相关系数为99.8%。
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引用次数: 0
New trends in battery technologies 电池技术的新趋势
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.07
C. Vlad, C. Lungu
For reducing the carbon print electrical energy storing is essential. The current political agenda is high on environmental, economic, and social consequences of the battery fabrication technology and safety, recyclability, and all environmental consequences. The European Union (EU) has proposed a new Battery Regulation that intends to ensure sustainability for batteries placed on the EU market, developing a robust European battery industry and value chain. This study consists in providing information regarding the new trends and studies for new technologies regarding the development of batteries construction and use.
为了减少碳印,电能存储是必不可少的。当前的政治议程高度关注电池制造技术的环境、经济和社会后果,以及安全性、可回收性和所有环境后果。欧盟(EU)提出了一项新的电池法规,旨在确保欧盟市场上电池的可持续性,发展强大的欧洲电池产业和价值链。本研究旨在提供有关电池结构和使用发展的新趋势和新技术研究的信息。
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引用次数: 0
New developments in small scale wind turbines 小型风力涡轮机的新发展
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.12
C. Vlad, C. Lungu
Considering the global socio-economic context, the pressure on natural resources and of course the effects that exploitation has on natural ecosystems and fauna is more and more evident. The use of renewable energy sources, together with improvements in energy efficiency, can help reduce energy consumption, reduce greenhouse gas emissions and, consequently, prevent dangerous climate change. The integration of renewable energy sources in urban areas and in everyday life is a viable solution. The present paper focuses on the presentation of small-scale wind systems integrated in urban areas and not only to capitalize any energy as efficiently as possible.
考虑到全球社会经济背景,对自然资源的压力,当然还有开采对自然生态系统和动物的影响越来越明显。使用可再生能源,再加上提高能源效率,有助于减少能源消耗,减少温室气体排放,从而防止危险的气候变化。在城市地区和日常生活中整合可再生能源是一个可行的解决方案。本文重点介绍了在城市地区集成的小型风力系统,不仅要尽可能有效地利用任何能源。
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引用次数: 0
Preliminary study on the behavioral response of zebrafish to the presence of methionine and polypropylene residues in water 斑马鱼对水中蛋氨酸和聚丙烯残留行为反应的初步研究
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.08
A. Savuca, A. Curpan, L. Hrițcu, A. Ciobica, G. Plăvan, M. Nicoara
When it comes to pollutants in the aquatic environment, there is a wide variety of products, from fibers and plastics to food and medicinal compounds and their by-products. Pollutants have been an area of interest for decades and are becoming more popular with each passing year, whether their presence and effects are studied separately by class or in combination. Among all, polymeric materials are in the center of attention, and their presence in the environment has long been established with studies on their harmful effects. Improper disposal of pharmaceutical materials is just one of many ways that lead to their accumulation in water and soil. The worldwide spread in the environment of polymeric materials, as well as pharmaceutical pollutants is described by the literature, but also the effects of these two materials separately in terms of the behavior of zebrafish (Danio rerio). In this paper, we studied the "joint effect" of one polymeric material (polypropylene) and one pharmaceutical product (methionine - one of the essential aminoacids of the body, with antioxidant properties and multiple uses in the pharmaceutical field). Although we did not find many significant differences in terms of behavior, one aspect worth noting was the anxiolytic-like effect of microplastic on the social, and stress related behavior of zebrafish.
当涉及到水生环境中的污染物时,有各种各样的产品,从纤维和塑料到食品和药物化合物及其副产品。几十年来,污染物一直是一个令人感兴趣的领域,而且每年都变得越来越受欢迎,无论它们的存在和影响是按班级单独研究还是综合研究。其中,高分子材料是人们关注的焦点,其在环境中的存在早已被证实,并对其有害影响进行了研究。对药品的不当处理只是导致其在水和土壤中积累的许多方式之一。在世界范围内传播的高分子材料,以及药物污染物的环境被文献描述,而且这两种材料分别在斑马鱼(Danio rerio)的行为方面的影响。本文研究了一种高分子材料(聚丙烯)与一种医药产品(甲硫氨酸——人体必需氨基酸之一,具有抗氧化性能,在医药领域具有多种用途)的“联合效应”。虽然我们在行为方面没有发现许多显着差异,但值得注意的一个方面是微塑料对斑马鱼的社交和压力相关行为的焦虑样作用。
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引用次数: 0
Scanning Electron Microscopy and Energy Dispersive X-ray Spectrometry (SEM/EDX) - a semiquantitative eco-friendly method for identifying the metals in e-waste multi circuits boards 扫描电子显微镜和能量色散x射线光谱法(SEM/EDX) -一种半定量的环保方法,用于识别电子废物多电路板中的金属
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.09
D. Simedru, A. Becze
Fast technological growth, the lack of civic responsibility regarding e-waste recycling, storage, and disposal, the lack of many years of specific legislation, and the lack of solutions to manage e-waste have led to an accelerated increase in environmental pollution. Besides pollution, other aspects, such as the depletion of natural resources, must be considered regarding e-waste, especially minerals and metals. Efficient waste management programs aim to recover the essential components of e-waste and to dispose of the others safely. A case study was applied on several boards from computer hard drives that were intended for testing if Scanning Electron Microscopy and Energy Dispersive X-ray Spectrometry (SEM/EDX) can be used to identify in a quick and eco-friendly manner the metals from e-waste multi-circuit boards. The results confirm that SEM/EDX can successfully replace the traditional method for metal determination, the first step in establishing the recovery methods.
技术的快速发展,在电子垃圾回收、储存和处置方面缺乏公民责任,缺乏多年的具体立法,以及缺乏管理电子垃圾的解决方案,导致环境污染加速增加。除了污染,其他方面,如自然资源的枯竭,必须考虑到电子废物,特别是矿物和金属。有效的废物管理计划旨在回收电子废物的基本组成部分,并安全地处理其他部分。一个案例研究应用于几块来自计算机硬盘驱动器的电路板,旨在测试扫描电子显微镜和能量色散x射线光谱(SEM/EDX)是否可以用于快速和环保地识别电子废物多电路板中的金属。结果证实,SEM/EDX可以成功取代传统的金属测定方法,是建立回收方法的第一步。
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引用次数: 0
Mean value theorem for a real continuous function with several real variables 具有多个实变量的实连续函数的中值定理
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.01
Jenica Cringanu
In this paper, we establish a mean value theorem for a real continuous function with several real variables, using the Frechet semi-differentials of the function.
本文利用函数的Frechet半微分,建立了具有多个实变量的实连续函数的中值定理。
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引用次数: 0
Considerations regarding PV systems 关于光伏系统的考虑
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.14
C. Vlad, C. Lungu
The integration of renewable power supplies in urban areas and their integration in everyday life is the new trend for the latest research. By using renewable power supplies combined with the latest improvements regarding energy efficiency can help reduce energy consumption, greenhouse gas effect and toxic emissions. This paper presents the latest research in PV systems integration within cities. Urban areas have an unexplored potential for decentralized power production. PV systems are affordable and require minimal maintenance, thus making them suitable for such applications.
城市可再生能源的整合和日常生活的整合是最新研究的新趋势。通过使用可再生能源,结合能源效率的最新改进,可以帮助减少能源消耗,温室气体效应和有毒物质的排放。本文介绍了城市光伏系统集成的最新研究进展。城市地区在分散发电方面具有尚未开发的潜力。光伏系统价格合理,需要最少的维护,因此适合此类应用。
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引用次数: 0
Cannabinoids: an exploratory review 大麻素:一个探索性的回顾
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-10-13 DOI: 10.35219/ann-ugal-math-phys-mec.2022.1.03
Cristina (Paraschiv) Nedelcu, M. Praisler
Since 2000, the synthetic cannabinoids drug market is in a continuous expansion and development. Unfortunately, addictive trends include not only the adult population but also adolescents. The new synthetic cannabinoids compounds have similar effects as the Cannabis plant, but are more potent and present a higher risk for consumers. Globally, the fight against drug production, distribution and use involves several directions, including the development of new analytical tools able to identify these new illicit substances. The aim of this paper is to present a systematic review regarding the class of cannabinoids in terms of their physico-chemical properties and biological effects.
自2000年以来,合成大麻药物市场不断扩大和发展。不幸的是,上瘾趋势不仅包括成年人,也包括青少年。新的合成大麻素化合物与大麻植物具有相似的作用,但效力更强,对消费者来说风险更高。在全球范围内,打击毒品生产、分销和使用涉及几个方向,包括开发能够识别这些新的非法物质的新分析工具。本文对大麻素类的理化性质和生物效应进行了系统的综述。
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引用次数: 0
Application of the gas-chromatographic analysis method for the characterization of oils in high capacity industrial electrical equipment 气相色谱分析方法在大容量工业电气设备中油类表征中的应用
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-10-13 DOI: 10.35219/ann-ugal-math-phys-mec.2022.1.06
Florin Sloată, A. Ene, O. Bogdevich
The article aims to highlight one of the highest environmental issues, caused by pollution with persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs). This form of environmental pollution with a negative impact on human health would not be possible without the use of high voltage industrial electrical equipment with dielectric fluids infested with various PCB isomers. In order to carry out the experimental program, samples of dielectric fluids both from Romania and Indonesia were investigated. The PCBs-containing samples were characterized using GC-ECD technique, employing an Agilent 7890 gas chromatograph equipped with a 15 mCi 63Ni µECD detector. PCBs concentrations were calculated using the standard calibration method based on the internal standard according to the corresponding normative documents. Ongoing work is carried out to adapt the technique for the analysis of PCBs in soils contaminated with oil products.
这篇文章旨在强调由持久性有机污染物(POPs)如多氯联苯(PCBs)造成的污染所引起的最严重的环境问题之一。如果不使用含有各种多氯联苯异构体的介电流体的高压工业电气设备,就不可能出现这种对人类健康产生负面影响的环境污染。为了实施实验方案,对罗马尼亚和印度尼西亚的介质流体样品进行了研究。采用气相色谱-ECD技术对含pcb样品进行表征,采用安捷伦7890气相色谱仪配15 mCi 63NiµECD检测器。根据相应的规范性文件,采用基于内标的标准校准方法计算多氯联苯浓度。目前正在进行的工作是将该技术用于分析受石油产品污染的土壤中的多氯联苯。
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引用次数: 0
Characterization of soils around a former chemical plant in Braila, SE Romania, using high performance atomic techniques (EDXRF, AAS, ICP-MS) 高性能原子技术(EDXRF、原子吸收光谱、ICP-MS)对罗马尼亚东南部Braila某前化工厂周围土壤的表征
IF 1 Q4 FOOD SCIENCE & TECHNOLOGY Pub Date : 2022-10-13 DOI: 10.35219/ann-ugal-math-phys-mec.2022.1.05
Florin Sloată, A. Ene, O. Bogdevich, T. Spanos
This paper presents the problem of soil pollution in the vicinity of a former chemical plant, given that production activity was stopped for more than thirty years ago. The old chemical plant was located in the southern part of Braila town, SE Romania, just a few kilometers from the left bank of the Danube River. Prior to 1990, there was a significant production of industrial chemical goods, such as sulfuric acid, carbon dioxide for synthetic fibers, chlorine gas and hydrochloric acid obtained by electrolysis processes with mercury electrodes and heavy metal catalysts (Cd, Ni, Zn), sodium sulfide and sulphate, etc. For the good development of the experimental program, a number of 10 soil samples were collected from the north, northwest, west, southwest and south of the former chemical plant. The multi-element analysis method used to determine the trace elements in the soil samples was energy-dispersive X-ray fluorescence spectrometry (EDXRF), using a Genius XRF portable spectrometer manufactured by Skyray Instruments Inc., equipped with a large surface Si with a Be window and a 40 kV/100 µA miniature X-ray tube excitation source with Ag target. The spectrometric system has an energy resolution up to 139 eV, and the detection limits of the order of ppm. A total of 21 chemical elements were identified in the target soil samples, such as: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Hg, Rb, Sr, Y, Zr, Nb, Mo, Sn, Sb, Pb. The compositional analyses of contaminated industrial soils were completed by using the AAS and ICP-MS high performance and selectivity techniques.
本文介绍了一家前化工厂附近的土壤污染问题,该化工厂的生产活动在三十多年前就停止了。这座老化工厂位于罗马尼亚东南部的Braila镇南部,距离多瑙河左岸仅几公里。1990年以前,工业化学产品的产量很大,如硫酸、合成纤维用的二氧化碳、用汞电极和重金属催化剂(Cd、Ni、Zn)电解得到的氯气和盐酸、硫化钠和硫酸盐等。为了使实验方案顺利进行,在原化工厂的北、西北、西、西南、南等地采集了10个土壤样品。土壤样品中痕量元素的多元素分析方法是能量色散x射线荧光光谱法(EDXRF),使用Skyray Instruments公司生产的Genius XRF便携式光谱仪,配备带有Be窗口的大表面Si和40 kV/100µa的微型x射灯管激发源,以Ag为目标。该光谱系统的能量分辨率可达139ev,检测限为ppm数量级。在目标土壤样品中共鉴定出21种化学元素,分别为:K、Ca、Ti、V、Cr、Mn、Fe、Ni、Cu、Zn、as、Hg、Rb、Sr、Y、Zr、Nb、Mo、Sn、Sb、Pb。采用原子吸收光谱法和ICP-MS高效选择性技术对污染的工业土壤进行了成分分析。
{"title":"Characterization of soils around a former chemical plant in Braila, SE Romania, using high performance atomic techniques (EDXRF, AAS, ICP-MS)","authors":"Florin Sloată, A. Ene, O. Bogdevich, T. Spanos","doi":"10.35219/ann-ugal-math-phys-mec.2022.1.05","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.1.05","url":null,"abstract":"This paper presents the problem of soil pollution in the vicinity of a former chemical plant, given that production activity was stopped for more than thirty years ago. The old chemical plant was located in the southern part of Braila town, SE Romania, just a few kilometers from the left bank of the Danube River. Prior to 1990, there was a significant production of industrial chemical goods, such as sulfuric acid, carbon dioxide for synthetic fibers, chlorine gas and hydrochloric acid obtained by electrolysis processes with mercury electrodes and heavy metal catalysts (Cd, Ni, Zn), sodium sulfide and sulphate, etc. For the good development of the experimental program, a number of 10 soil samples were collected from the north, northwest, west, southwest and south of the former chemical plant. The multi-element analysis method used to determine the trace elements in the soil samples was energy-dispersive X-ray fluorescence spectrometry (EDXRF), using a Genius XRF portable spectrometer manufactured by Skyray Instruments Inc., equipped with a large surface Si with a Be window and a 40 kV/100 µA miniature X-ray tube excitation source with Ag target. The spectrometric system has an energy resolution up to 139 eV, and the detection limits of the order of ppm. A total of 21 chemical elements were identified in the target soil samples, such as: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Hg, Rb, Sr, Y, Zr, Nb, Mo, Sn, Sb, Pb. The compositional analyses of contaminated industrial soils were completed by using the AAS and ICP-MS high performance and selectivity techniques.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"123 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78930789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology
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