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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
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.10
A. Becze, D. Simedru
{"title":"Rapid detection of milk adulteration using Raman spectroscopy and statistical modelling","authors":"A. Becze, D. Simedru","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.10","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.10","url":null,"abstract":"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 %.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"39 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79058705","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
New trends in battery technologies 电池技术的新趋势
IF 1
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.07
C. Vlad, C. Lungu
{"title":"New trends in battery technologies","authors":"C. Vlad, C. Lungu","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.07","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.07","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"167 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76180069","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
New developments in small scale wind turbines 小型风力涡轮机的新发展
IF 1
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.12
C. Vlad, C. Lungu
{"title":"New developments in small scale wind turbines","authors":"C. Vlad, C. Lungu","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.12","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.12","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"2 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87939792","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
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
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food 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
{"title":"Preliminary study on the behavioral response of zebrafish to the presence of methionine and polypropylene residues in water","authors":"A. Savuca, A. Curpan, L. Hrițcu, A. Ciobica, G. Plăvan, M. Nicoara","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.08","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.08","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88098532","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
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
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.09
D. Simedru, A. Becze
{"title":"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","authors":"D. Simedru, A. Becze","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.09","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.09","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"3 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90601719","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
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
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.01
Jenica Cringanu
{"title":"Mean value theorem for a real continuous function with several real variables","authors":"Jenica Cringanu","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.01","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.01","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87668057","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
Considerations regarding PV systems 关于光伏系统的考虑
IF 1
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-12-12 DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.14
C. Vlad, C. Lungu
{"title":"Considerations regarding PV systems","authors":"C. Vlad, C. Lungu","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.14","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.14","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"44 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78136247","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
Cannabinoids: an exploratory review 大麻素:一个探索性的回顾
IF 1
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-10-13 DOI: 10.35219/ann-ugal-math-phys-mec.2022.1.03
Cristina (Paraschiv) Nedelcu, M. Praisler
{"title":"Cannabinoids: an exploratory review","authors":"Cristina (Paraschiv) Nedelcu, M. Praisler","doi":"10.35219/ann-ugal-math-phys-mec.2022.1.03","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.1.03","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"2 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82633202","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
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
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology Pub Date : 2022-10-13 DOI: 10.35219/ann-ugal-math-phys-mec.2022.1.06
Florin Sloată, A. Ene, O. Bogdevich
{"title":"Application of the gas-chromatographic analysis method for the characterization of oils in high capacity industrial electrical equipment","authors":"Florin Sloată, A. Ene, O. Bogdevich","doi":"10.35219/ann-ugal-math-phys-mec.2022.1.06","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.1.06","url":null,"abstract":"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.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"22 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78471105","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
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
Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food 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
{"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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