Advanced Technologies最新文献_第4页

Investigation of different extraction conditions on the efficiency of gliadin extraction and determination by ELISA method 考察了不同提取条件对麦胶蛋白提取率的影响，并对ELISA法进行了测定

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102009g

V. Gojković–Cvjetković, R. Grujić, Ž. Marjanović-Balaban, V. Kalaba

{"title":"Investigation of different extraction conditions on the efficiency of gliadin extraction and determination by ELISA method","authors":"V. Gojković–Cvjetković, R. Grujić, Ž. Marjanović-Balaban, V. Kalaba","doi":"10.5937/savteh2102009g","DOIUrl":"https://doi.org/10.5937/savteh2102009g","url":null,"abstract":"Gluten refers to a complex mixture of gliadins and glutenins. It can cause numerous foodborne disorders. In sensitive individuals gluten can lead to celiac disease (CD), wheat sensitivity and allergy. Gliadin proteins are one of the gluten fractions. The aim of this paper was to examine how different conditions, mixing time (2.5, 5, 7.5, and 10 min) of the sample with the most commonly solvent 70% (v/v) ethanol and 70% (v/v) isopropanol and incubation time (15, 20, 25, and 30 min) affect the efficiency of gliadin determination with the ELISA method. A commercial kit was used to determine gliadin concentrations, and absorbance was measured at 450 nm, using the ELISA reader. Based on the obtained results, the optimal mixing time of the sample with the solvents was 5 minutes and the incubation time was 25 minutes. Under these conditions, the extraction efficiency is the best, i.e., the highest gliadin concentration is obtained. The results of research can be of fundamental importance in the study of gluten proteins and the impact of technological procedures on their change and the possibility of reducing the allergic effect.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82626933","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: 1

Benzoic acid removal from aqueous solutions by activated charcoal 活性炭去除水溶液中苯甲酸

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2101005p

S. Petrović, S. Savić, J. Zvezdanović, L. Nikolić, S. Stojiljković

引用次数: 0

Black pepper: Chemical composition and biological activities 黑胡椒:化学成分及生物活性

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102040m

A. Milenković, L. Stanojević

引用次数: 10

The influence of fatty acid composition on the kinetics of the vegetable oil methanolysis reaction 脂肪酸组成对植物油甲醇分解反应动力学的影响

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102024k

Milan Kostic, Olivera S. Stamenković, V. Veljković

引用次数: 1

The influence of FWA chemical constitution to the whiteness and UV protection of cotton and cotton/polyester blend FWA化学成分对棉和棉/涤纶混纺织物白度和防紫外线性能的影响

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102066b

L. Botteri, Tihana Dekanić, A. Tarbuk, D. Đorđević

{"title":"The influence of FWA chemical constitution to the whiteness and UV protection of cotton and cotton/polyester blend","authors":"L. Botteri, Tihana Dekanić, A. Tarbuk, D. Đorđević","doi":"10.5937/savteh2102066b","DOIUrl":"https://doi.org/10.5937/savteh2102066b","url":null,"abstract":"It is well known that the optimal concentration of fluorescent whitening agent (FWA) in the bath results in high whiteness of single component textiles. At the same time, due to fluorescence of FWA, the higher UV protection is achieved as well. However, for the textile blends it is not so easy to achieve. Depending on the fabric chemical composition, different FWAs must be applied. Therefore, the influence of FWA chemical constitution to the whiteness and UV protection of cotton and cotton/polyester blend were researched in this paper. For that purpose, cotton and cotton/polyester blended (50%/50%) fabrics was treated with four different FWAs by Huntsman, Uvitex® brand: BHT, RSB, NFW and EBF. Spectral remission before and after FWA treatment was measured on a remission spectrophotometer Spectraflash SF 300, Datacolor. Whiteness degree was calculated according to ISO 105-J02:1997, and the Tint Deviations and its coloristic meanings were determined according to Griesser. The UV protection of cotton and cotton/polyester fabrics treated with FWA was determined according to AS/NZS 4399:2017 using transmission spectrophotometer Cary 50/Solascreen, Varian. Based on the results obtained,the stilbene disulphonic acid triazine derivative (Uvitex® RSB) can be recommended for use on a cotton/polyester blend.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88130097","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

Chemical composition of the alkaloid extract isolated from Hylotelephium spectabile (Boreau) H. Ohba x telephium (L.) H. Ohba aerial parts Hylotelephium spectabile (Boreau) H. Ohba x telephium (L.)生物碱提取物的化学成分Ohba航空部件

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102005d

Miloš Đukić, J. Jovanović, G. Stojanović, S. Jovanovic

{"title":"Chemical composition of the alkaloid extract isolated from Hylotelephium spectabile (Boreau) H. Ohba x telephium (L.) H. Ohba aerial parts","authors":"Miloš Đukić, J. Jovanović, G. Stojanović, S. Jovanovic","doi":"10.5937/savteh2102005d","DOIUrl":"https://doi.org/10.5937/savteh2102005d","url":null,"abstract":"There are many motives to study alkaloids within Crassulaceae family, such as chemotaxonomic consideration of alkaloid distribution and evaluation of their biological potential. Data on alkaloids from Sedum telephium (syn. H. telephium) aroused interest for further alkaloid investigation within the genus Hylotelephium H. Ohba. Thus, the aim of this study was to investigate and characterize other plant sources of alkaloids from the same genus. An alkaloid extract (AE-HS) was isolated from fresh aerial parts of a cultivated hybrid H. spectabile x telephium. The chemical composition of AE-HS was determined by GC-MS (gas chromatography - mass spectrometry) method. Eight components were identified, which made up 91.8% of the sample. The most present component of AE-HS was g-crotonolactone (78.6%) followed by 3-methyl-2-butenal (8.6%) and (E)-coniferyl alcohol (2.8%). Nicotine was identified as the only alkaloid in the AE-HS (0.4%). Along with many non-alkaloid compounds, a previous study found six alkaloids in AE of S. telephium (~7%), suggesting differences from our results. Additionally, alkaloid distribution is limited within other genera of the family and belonging to the same genus does not mean a uniform qualitative composition. Further analyzes of AEs of Hylotelephium taxa would certainly shed light on the pattern of alkaloid distribution.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80313765","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

Development of novel cellulose-based functional materials 新型纤维素基功能材料的开发

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102073k

M. Kostić

{"title":"Development of novel cellulose-based functional materials","authors":"M. Kostić","doi":"10.5937/savteh2102073k","DOIUrl":"https://doi.org/10.5937/savteh2102073k","url":null,"abstract":"Nowadays, functional materials based on renewable bioresources and environmentally friendly processes have attracted increased attention of both the industrial and the scientific community. Cellulose, the structural material of all plants, is the most abundant natural and renewable polymer possessing some promising properties, such as mechanical robustness, hydrophilicity, biocompatibility, and biodegradability. This paper gives an overview of the current cellulose research directed towards an advanced understanding and application of this most important bioresource. Emphasis is placed on cellulose functionalization and its conversion into novel high-performance cellulose materials with tailored properties (such as fibers, films, membranes, composites, and biomedical materials). Various physical and chemical treatments (alkalis, oxidizing agents, acetylation, ultrasound treatment, plasma treatment, and many other single or combined methods) used for cellulose modification to adjust its properties for different purposes, have been concisely reviewed. Furthermore, the unique hierarchical architecture of natural cellulose consisting of nanoscale fibrils and crystallites allows the extraction of the nanocrystals, and micro- and nanofibrilated cellulose via mechanical and chemical methods or their combination. These nanocellulose materials offer great opportunities in the field of advanced and functional materials. Finally, a novel platform to prepare various cellulose-based materials through more efficient and environmentally friendly processes based on recently developed new and \"green\" solvents for cellulose has also been discussed.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82022075","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: 3

Synthesis, characterization, and evaluation of antioxidant and antimicrobial activity of three novel n-heteroaromatic hydrazonyl-thiazoles 三种新型n-杂芳香腙基噻唑的合成、表征及抗氧化抗菌活性评价

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102014k

Sanja B. Kokanov, M. Nikolic, I. Novaković, Tamara R. Todorović, N. Filipović

{"title":"Synthesis, characterization, and evaluation of antioxidant and antimicrobial activity of three novel n-heteroaromatic hydrazonyl-thiazoles","authors":"Sanja B. Kokanov, M. Nikolic, I. Novaković, Tamara R. Todorović, N. Filipović","doi":"10.5937/savteh2102014k","DOIUrl":"https://doi.org/10.5937/savteh2102014k","url":null,"abstract":"(Thiazolyl-2-yl)hydrazones (THs) are a group of organic compounds containing both hydrazone and 1,3-thiazole pharmacophores present in many approved drugs. They have been investigated greatly in recent years due to potent anticancer, antibacterial, antifungal, antituberculosis, anti-inflammatory, and antiparasitic activities. In this study, one pyridine-based and two quinoline-based, novel THs were synthesized and characterized by elemental analysis, Fourier-transform infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy (NMR). The antimicrobial activity of the compounds was tested against five Gram-positive and five Gram-negative bacteria, as well as against three fungi. The antioxidant capacity of the compounds was tested in six antioxidative assays. The results showed that quinoline-based THs were more active against tested Gram-negative bacteria and fungi strains than pyridine-based compounds. All the compounds showed excellent antioxidative activity comparable to or greater than the used standards (vitamin C and Trolox). Absorption, distribution, metabolism, excretion, and toxicity (ADMET) parameters were calculated in-silico. Results pointed to promising good pharmacokinetics profiles of investigated compounds, especially 2-quinoline carboxaldehyde-based compound, which can be a lead drug candidate.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82120805","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

Optimizing process parameters of clay-based ceramics with addition of construction and demolition waste 掺加建筑垃圾和爆破垃圾对粘土基陶瓷工艺参数的优化

Advanced Technologies Pub Date : 2021-01-01 DOI: 10.5937/savteh2102061a

B. Angjusheva, V. Ducman, Monika Fidancevska, V. Jovanov

{"title":"Optimizing process parameters of clay-based ceramics with addition of construction and demolition waste","authors":"B. Angjusheva, V. Ducman, Monika Fidancevska, V. Jovanov","doi":"10.5937/savteh2102061a","DOIUrl":"https://doi.org/10.5937/savteh2102061a","url":null,"abstract":"Construction and demolition waste produced in the Republic of North Macedonia remains a major economic and environmental problem because all construction and demolition waste ends up in local dumps or is disposed of in a landfill. The objective of this study was to investigate the influence of the process parameters on the physical and mechanical properties of clay-based ceramics with partial replacement of clay with construction and demolition waste. Determination of the chemical composition of the waste demolition brick using X-ray fluorescence showed that it consisted of different oxides such as SiO2, Al2O3, Fe2O3 and CaO and minor contents of alkaline and earth alkaline oxides. Production of these ceramics was conducted through the consolidation of clay and waste demolition brick with the evaluation of the main process parameters such as sintering temperature [ST], the content of waste demolition brick [WDB] and isothermal period at the final temperature [IP]. The final model equations for density and bending strength dependence of the main process parameters were obtained and presented. The microstructure of the ceramics determined by SEM shows that the waste material is homogeneously dispersed in the clay matrix.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80784770","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: 1

Synthesis and characterisation of hydrogels based on starch and citric acid 淀粉-柠檬酸水凝胶的合成与表征

Advanced Technologies Pub Date : 2020-01-01 DOI: 10.5937/savteh2001050n

L. Nikolić, T. Stojanović, V. Nikolić, M. Urošević, S. Ilić-Stojanović, Ana Tačić, I. Gajić, V. Savic, Aleksandar Zdravković

{"title":"Synthesis and characterisation of hydrogels based on starch and citric acid","authors":"L. Nikolić, T. Stojanović, V. Nikolić, M. Urošević, S. Ilić-Stojanović, Ana Tačić, I. Gajić, V. Savic, Aleksandar Zdravković","doi":"10.5937/savteh2001050n","DOIUrl":"https://doi.org/10.5937/savteh2001050n","url":null,"abstract":"In this study, two series of hydrogels were synthesised with different molar ratio of glucose units of starch and citric acid. The advantage of using natural raw materials (starch and citric acid) for the synthesis of hydrogels lies in the fact that these raw materials are synthesised in nature, beneficial to human beings, easily degradable after use and harmless. The generated hydrogels and starting reactants were structurally characterised by applying the method of Fourier transform infrared spectroscopy (FTIR). FTIR analysis shows that the synthesis reaction of hydrogels based on starch and citric acid rests upon the esterification reaction of carboxyl groups in citric acid with hydroxyl groups in starch. The residual amount of citric acid in synthesised hydrogels was determined under high pressure with high-performance liquid chromatography (HPLC). The values of unreacted citric acid range between 9.85 and 16.08%.The scanning electron microscopy was applied in the analysis of hydrogel morphology. The swelling of hydrogel was monitored at 25 °C in the solutions of pH values of 5, 7 and 9. The highest swelling degree (a=8.55) was achieved in water at pH 7 for the hydrogel synthesised with the smallest amount of citric acid as the cross-linker at the ratio of glucose units of starch and citric acid being 72. Hydrogels synthesised from such monomers are environmentally friendly and fully biodegradable.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89262410","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: 2