Advanced Technologies最新文献_第6页

Photochemical processes for removal of carbamate pesticides from water 从水中去除氨基甲酸酯类农药的光化学方法

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902072t

A. Tomašević, S. Petrović, D. Mijin

引用次数: 4

Nano-biocomplexes based on oligosaccharides and their derivates 基于低聚糖及其衍生物的纳米生物复合物

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902016c

M. Cakic, G. Nikolić, Ž. Mitić, Slobodan Glišić, D. Cvetković, L. Stanojević

引用次数: 0

TiO2 modified with carbonized materials: Photocatalysis/adsorption of organic pollutants from aqueous solution: A short review 碳化材料修饰TiO2:光催化/吸附水溶液中有机污染物的研究进展

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902082s

Hristina Stanković, A. Krstić, Miljana Rubežić, M. Vasić, M. Ranđelović, A. Zarubica

引用次数: 1

The effect of anions on decolorization of textile azo dye Reactive Orange 16 with UV/H2O2 process 阴离子对纺织偶氮染料活性橙16 UV/H2O2脱色的影响

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901033M

J. Mitrović, Miljana Radović-Vučić, M. Kostić, N. Velinov, S. Najdanović, D. Bojić, A. Bojić

{"title":"The effect of anions on decolorization of textile azo dye Reactive Orange 16 with UV/H2O2 process","authors":"J. Mitrović, Miljana Radović-Vučić, M. Kostić, N. Velinov, S. Najdanović, D. Bojić, A. Bojić","doi":"10.5937/SAVTEH1901033M","DOIUrl":"https://doi.org/10.5937/SAVTEH1901033M","url":null,"abstract":"The effects of various organic and inorganic anions on decolorization of textile dye Reactive Orange 16 by means of hydroxyl radicals have been studied. These anions are commonly present in wastewaters from textile industry and include chloride, sulfate, carbonate/bicarbonate, nitrate and acetate anions. The experiments were conducted in the presence of different concentrations of anions and at different initial pH values in a batch photoreactor equipped with UV-C (254 nm) lamps in the presence of hydrogen peroxide. It was obtained that decolorization efficiency was significantly affected by nature and concentration of the investigated anions. An inhibitory effect of acetate anions increased with increasing in their concentration and depended on whether protonated or deprotonated forms are favored. Carbonate anion showed specific, both positive and negative influence, depending on its concentration. Influence of bicarbonate, nitrate and chloride was more prominent at their higher initial concentrations. The presence of sulfate did not have noticeable impact on decolorization of RO16 dye under investigated conditions.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91077945","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

The optimization of ultrasound-assisted extraction of total flavonoids from pot marigold (Calendulae officinalis L.) flowers 超声辅助提取万寿菊花总黄酮的工艺优化

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901010Z

S. Žerajić, I. Savić-Gajić, I. Savić, G. Nikolić

{"title":"The optimization of ultrasound-assisted extraction of total flavonoids from pot marigold (Calendulae officinalis L.) flowers","authors":"S. Žerajić, I. Savić-Gajić, I. Savić, G. Nikolić","doi":"10.5937/SAVTEH1901010Z","DOIUrl":"https://doi.org/10.5937/SAVTEH1901010Z","url":null,"abstract":"Pot marigold (Calendula officinalis L.) contains various bioactive compounds such as flavonoids, tannins, saponosides, carotenoids, triterpene alcohols, polysaccharides, amino acids, and essential oil. The extract of pot marigold flower has a benefit to the skin due to the presence of flavonoids that possess the anti-inflammatory, astringent, antifungal, and antiseptic effects. The aim of this study was to apply the ultrasound-assisted extraction as an advanced extraction technique and to investigate the impact of extraction time (5-35 min), ethanol concentration (20-80%, v/v), and extraction temperature (30-70 °C) on the total flavonoid content of pot marigold flower at the liquid-to-solid ratio of 20 cm3 g-1. The total flavonoids content of the extracts was determined spectrophotometrically with aluminium (III) chloride. The modeling of ultrasound-assisted extraction was carried out using a Box-Behnken design. Thus found optimal extraction conditions were the extraction time of 29 min, 39.6% (v/v) ethanol, and extraction temperature of 64.2 °C. The experimental value (220.2 mg 100 g-1 d.w.) of the total flavonoid content under optimal conditions was in a good agreement with the predicted value (221.5 mg 100 g-1 d.w.). According to the results of statistical analysis, the proposed second-order polynomial equation can be used to describe the extraction of flavonoids and to predict the total flavonoid content. The extraction procedure can be accepted from the point of the pharmaceutical application due to the use of ethanol as a representative of green solvents. The extraction time was shorter compared with other conventional extraction techniques.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82167047","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: 6

The selection of technologies in the water management sector in Bosnia and Herzegovina for the reduction of GHG emissions by using Backcasting and the assessment methods for technology needs 波斯尼亚和黑塞哥维那水管理部门的技术选择，通过使用回溯法减少温室气体排放，以及技术需求的评估方法

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901019V

Đ. Vojinović, M. Maksimović

{"title":"The selection of technologies in the water management sector in Bosnia and Herzegovina for the reduction of GHG emissions by using Backcasting and the assessment methods for technology needs","authors":"Đ. Vojinović, M. Maksimović","doi":"10.5937/SAVTEH1901019V","DOIUrl":"https://doi.org/10.5937/SAVTEH1901019V","url":null,"abstract":"In Bosnia and Herzegovina, climate change is increasingly considered to be the matter of key strategic importance, especially by local authorities and the academic community. The State development vision is that by 2025 Bosnia and Herzegovina (B&H) will be a sustainable and progressive 'green economy'. The implementation of measures for the reduction of greenhouse gases emission is an optimal opportunity and a chance to start a technological transition with international professional and financial help. In B&H, through consultative activities, seven priority sectors for the adaptation to climate changes were identified: agriculture, biodiversity and vulnerable ecosystems, energy (hydro-energy), forestry, public health, tourism and water resources/water management. Water management and agriculture are considered as main priorities that have a significant impact on other sectors. Having in mind its descriptive character and the characteristic of the problem solving at the very beginning, the backcasting approach is much more convenient for solving long-term problems and for offering long-term sustainable solutions. The aim of this paper is the identification of optimal technologies in the water management sector using the backcasting approach which can be applied in B&H, and their analysis through the TNAssess software to evaluate their acceptability and the possibilities of their use in B&H.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88973519","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

Simultaneous determination of five phthalates in white spirits using liquid-liquid extraction followed by gas chromatography-mass spectrometry 液-液萃取-气相色谱-质谱法同时测定白酒中5种邻苯二甲酸盐

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901059B

Danica Bogdanovic, Tatjana Anđelković, Ivana T. Kostić, G. Kocic

{"title":"Simultaneous determination of five phthalates in white spirits using liquid-liquid extraction followed by gas chromatography-mass spectrometry","authors":"Danica Bogdanovic, Tatjana Anđelković, Ivana T. Kostić, G. Kocic","doi":"10.5937/SAVTEH1901059B","DOIUrl":"https://doi.org/10.5937/SAVTEH1901059B","url":null,"abstract":"The aim of this paper is the development of the method for determination of five phthalates in white spirits. Dimethyl phthalate (DMP), di-n-butyl phthalate (DBP), benzyl butyl phthalate (BBP), di-(2-ethylhexyl) phthalate (DEHP) and di-n-octyl phthalate (DOP) were extracted from white spirits by the optimized liquid-liquid extraction (LLE) method. In order to determine the best method for phthalate determination, LLE procedure was optimized by changing the following parameters: the number of extraction repetitions (1-4), the partial removal of ethanol by evaporation from alcoholic samples prior extraction, the type of agitation and the extraction time. Quantification was achieved by gas chromatography-mass spectrometry (GC-MS) with di-n-butyl adipate (DBA) as internal standard. Phthalates were analyzed using a single ion monitoring (SIM) mode and a base ion for each phthalate was chosen (m/z 149 for DBP, BBP, DEHP and DOP and m/z 163 for DMP). The results show that the most effective phthalate extraction with n-hexane as a solvent is achieved with agitation by hand shaking with one-step extraction. Evaporation of ethanol from alcohol drinks provided the increased recovery value for DMP extraction but did not have an impact on the recovery values of DBP, BBP, DEHP and DOP extractions from the samples.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83577609","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

Determination of clindamycin phosphate in extemporaneously prepared pessaries with glycerol-gelatin basis 甘油-明胶基临时配制的子宫托中克林霉素磷酸含量的测定

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902066s

V. Savic, S. Sunarić, J. Zivkovic, A. Stamenković, I. Nikolic, Ana Tačić, V. Nikolić

{"title":"Determination of clindamycin phosphate in extemporaneously prepared pessaries with glycerol-gelatin basis","authors":"V. Savic, S. Sunarić, J. Zivkovic, A. Stamenković, I. Nikolic, Ana Tačić, V. Nikolić","doi":"10.5937/savteh1902066s","DOIUrl":"https://doi.org/10.5937/savteh1902066s","url":null,"abstract":"Pessaries with clindamycin phosphate as active component were prepared by moulding. Glycerol-gelatin basis was used as the hydrophilic basis. The pessaries were made with and without the surface-active agent Tween 80 as an excipient. The content of clindamycin phosphate in all samples was determined by high performance liquid chromatography (HPLC) based on the calibration curve of clindamycin phosphate standard solution. The clindamycin phosphate content in the glycerol-gelatin pessaries with or without Tween 80 was optimal. Preparation of extemporaneous (magistral) medicines provides personalization of therapy and the possibility of selection of the most appropriate basis for the specific active substance, which also influences the effectiveness of the therapy. The active substance content in the magistral preparations is not subject to veri-fication in the everyday pharmacy practice. However, by validating the technological process of manufacture and by controlling the quality of the obtained preparations, the choice of the basis in the magistral medicine preparation can be optimized. In this manner, the guidelines for the galenic preparation, including pessaries, can be given to ensure their optimal therapeutic effect.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75273025","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

Investigation of adsorption performance of chitosan for the removal of hexavalent chromium from aqueous solutions 壳聚糖对水溶液中六价铬的吸附性能研究

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902058e

Marija Egerić, K. Stanković, Radojka Vujasin, L. Matović, Đ. Petrović, A. Devecerski, K. Kumrić

{"title":"Investigation of adsorption performance of chitosan for the removal of hexavalent chromium from aqueous solutions","authors":"Marija Egerić, K. Stanković, Radojka Vujasin, L. Matović, Đ. Petrović, A. Devecerski, K. Kumrić","doi":"10.5937/savteh1902058e","DOIUrl":"https://doi.org/10.5937/savteh1902058e","url":null,"abstract":"Hexavalent chromium is a highly toxic pollutant that exists in industrial wastewater effluents. The efficient removal of Cr(VI) from these effluents before their discharging into the environment is of great importance. Biopolymer chitosan was used as an adsorbent for the removal of Cr(VI) ions from aqueous solutions. The adsorbent characterization was carried out by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. Batch adsorption experiments were conducted to evaluate the effects of different parameters, such as contact time, solution pH, adsorbent dose, initial Cr(VI) concentration and ionic strength, on Cr(VI) removal. The obtained results revealed that the adsorption equilibrium was accomplished within 60 min. The adsorption was highly dependent on the solution pH and the maximum removal of Cr(VI) occured in the pH range 2.0 – 3.5. Analysis of kinetic parameters of Cr(VI) adsorption showed that pseudo-second order model described the kinetics for the investigated system. The data were fitted using two equilibrium adsorption models – Langmuir and Freundlich isotherm. The adsorption equilibrium data fit the Langmuir equation and the maximum adsorption capacity was found to be 91.4 mg g-1. The presence of co-existing anions at higher concentrations significantly reduced the removal of Cr(VI) by chitosan. According to the presented results, it can be concluded that biopolymer chitosan has a great potential for application in the treatment of chromium contaminated wastewaters.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84353410","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

The influence of the type and width of the cut marker on the utilization of textile materials 裁切标志的类型和宽度对纺织材料利用率的影响

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902099z

Silvana Zhezhova, G. Demboski, Vineta Srebrenkoska, Sonja Jordeva, Longurova Golomeova Sashka

引用次数: 2