Đorđe Glišin, Ljiljana Jelenković, Nataša Pejković, D. Dimitrijević, Jelena Voinović, Saša D. Stanković, B. Arsić
Isopropylidene acetals and ketals are frequent protecting groups in the chemistry of carbohydrates, particularly in organic synthesis. The yield of these derivatives must be high. Besides already published syntheses, we report a new way of synthesizing these derivatives in high yields and efficient deprotection. Acetyl and benzoyl groups are frequent protecting groups, and their use in carbohydrate chemistry , particularly on the derivative of D-glucurono-6,3-lactone was shown. Reactions of 1,2,5-triO-acetyl-D-glucurono-6,3-lactone with BF3 and (CH3CH2)3SiH, LiBH4, respectively and I2, were also reported.
异丙烯缩醛和酮是碳水化合物化学中常见的保护基团，特别是在有机合成中。这些衍生品的收益率一定很高。除了已发表的合成方法外，我们还报道了一种高收率和高效脱保护的合成这些衍生物的新方法。乙酰基和苯甲酰基是常用的保护基团，它们在碳水化合物化学中的应用，特别是在d -葡萄糖醛酸-6,3-内酯的衍生物上。报道了1,2,5-三乙酰- d -葡萄糖醛酸-6,3-内酯分别与BF3和(CH3CH2)3SiH, LiBH4和I2的反应。
{"title":"D-glucurono-6,3-lactone as an interesting compound in the synthetic chemistry of carbohydrates related targets","authors":"Đorđe Glišin, Ljiljana Jelenković, Nataša Pejković, D. Dimitrijević, Jelena Voinović, Saša D. Stanković, B. Arsić","doi":"10.5937/savteh2301084g","DOIUrl":"https://doi.org/10.5937/savteh2301084g","url":null,"abstract":"Isopropylidene acetals and ketals are frequent protecting groups in the chemistry of carbohydrates, particularly in organic synthesis. The yield of these derivatives must be high. Besides already published syntheses, we report a new way of synthesizing these derivatives in high yields and efficient deprotection. Acetyl and benzoyl groups are frequent protecting groups, and their use in carbohydrate chemistry , particularly on the derivative of D-glucurono-6,3-lactone was shown. Reactions of 1,2,5-triO-acetyl-D-glucurono-6,3-lactone with BF3 and (CH3CH2)3SiH, LiBH4, respectively and I2, were also reported.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84439980","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}
G. Nikolić, Nataša Simonović, Ljubiša Nikolić, Miloš Durmišević, Dragana Marković-Nikolić, N. Ristic, A. Bojić
The conventional approach to researching the phosphate sorption process using a modified bottle gourd sorbent (the quaternary ammonium Lagenaria vulgaris shell), regardless of a large number of conducted experiments, indicated certain shortcomings in the prediction of the optimal process conditions. To fill the gaps in previous research, a design study involving conventional (comparative kinetic, thermodynamic and equilibrium) and "One-Variable-At-a-Time" (OVAT) experimental approaches integrated with "Design of Experiments" (DoE) methodology was carried out. The integrated experimental design is implemented in the phosphate sorption process optimization to evaluate significant factors (optimal sorption conditions), and their influence on the response (sorption efficiency), and to predict the maximum sorbent capacity in accordance with the sorption mechanism. The critical factors of the sorption process were determined through the OVAT method. The evaluation of factors' interactive effects was realized using a central composite design (CCD) method within response surface methodology (RSM). A statistical software (JMP Pro16) was applied for planning the experiments , data processing and statistical analysis of the obtained results, which randomly generated a CCD matrix with 4 factors (initial concentration-C o , pH value, temperature-T, time-t) on three levels (-1, 0, +1). The derived second-order polynomial model of phosphate sorption proved to be highly significant (p<0.0001). A statistically significant factor interaction is between the pH value and the initial concentration of phosphate ions. The experimental maximum sorption capacity (17.48 mg/g), very close to the predicted value (17.58 mg/g), indicated the capability and applicability of the regression model. The model finds a potential application in the optimization of the phosphate-contaminated wastewater treatment processes using the environmentally friendly cationic bottle gourd shell.
{"title":"An integrated OVAT-RSM design to gaps-filling in the study of phosphate sorption process onto cationic modified bottle gourd shell","authors":"G. Nikolić, Nataša Simonović, Ljubiša Nikolić, Miloš Durmišević, Dragana Marković-Nikolić, N. Ristic, A. Bojić","doi":"10.5937/savteh2301005n","DOIUrl":"https://doi.org/10.5937/savteh2301005n","url":null,"abstract":"The conventional approach to researching the phosphate sorption process using a modified bottle gourd sorbent (the quaternary ammonium Lagenaria vulgaris shell), regardless of a large number of conducted experiments, indicated certain shortcomings in the prediction of the optimal process conditions. To fill the gaps in previous research, a design study involving conventional (comparative kinetic, thermodynamic and equilibrium) and \"One-Variable-At-a-Time\" (OVAT) experimental approaches integrated with \"Design of Experiments\" (DoE) methodology was carried out. The integrated experimental design is implemented in the phosphate sorption process optimization to evaluate significant factors (optimal sorption conditions), and their influence on the response (sorption efficiency), and to predict the maximum sorbent capacity in accordance with the sorption mechanism. The critical factors of the sorption process were determined through the OVAT method. The evaluation of factors' interactive effects was realized using a central composite design (CCD) method within response surface methodology (RSM). A statistical software (JMP Pro16) was applied for planning the experiments , data processing and statistical analysis of the obtained results, which randomly generated a CCD matrix with 4 factors (initial concentration-C o , pH value, temperature-T, time-t) on three levels (-1, 0, +1). The derived second-order polynomial model of phosphate sorption proved to be highly significant (p<0.0001). A statistically significant factor interaction is between the pH value and the initial concentration of phosphate ions. The experimental maximum sorption capacity (17.48 mg/g), very close to the predicted value (17.58 mg/g), indicated the capability and applicability of the regression model. The model finds a potential application in the optimization of the phosphate-contaminated wastewater treatment processes using the environmentally friendly cationic bottle gourd shell.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78794515","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}
Miona Stanković, S. Kravić, Nebojša Stanojević, Marija B. Tasic, V. Veljković
Strawberry pomace is the beverage industry waste and should be utilized as circular economy feedstock, animal feed, or a fertilizer following environmental regulations. This work aimed to characterize and implement strawberry pomace oil in the biodiesel industry. Oil was extracted from the strawberry seed by a maceration method for physicochemical characterization. Two seed/solvent ratios were used to achieve the maximum oil yield. The yield of strawberry seed oil by n-hexane extraction at the seed/solvent ratio of 1:3 was 0.11 g/g. Extracted strawberry oil was used for biodiesel production by a two-step process that included the acid (H 2 SO 4)-catalyzed pre-esterification of strawberry oil, followed by the base (KOH)-catalyzed transesterification of the pre-esterified strawberry oil. Further, the methanolysis ensured a biodiesel content of 97.2% in 30 min. However, the low yield of this technology's final product and physicochemical characterization showed that strawberry oil should be used in a mixture with other oils (hybrid oil) for biodiesel production, or in the cosmetics and food industry.
{"title":"Biodiesel production from strawberry pomace seed oil","authors":"Miona Stanković, S. Kravić, Nebojša Stanojević, Marija B. Tasic, V. Veljković","doi":"10.5937/savteh2301020s","DOIUrl":"https://doi.org/10.5937/savteh2301020s","url":null,"abstract":"Strawberry pomace is the beverage industry waste and should be utilized as circular economy feedstock, animal feed, or a fertilizer following environmental regulations. This work aimed to characterize and implement strawberry pomace oil in the biodiesel industry. Oil was extracted from the strawberry seed by a maceration method for physicochemical characterization. Two seed/solvent ratios were used to achieve the maximum oil yield. The yield of strawberry seed oil by n-hexane extraction at the seed/solvent ratio of 1:3 was 0.11 g/g. Extracted strawberry oil was used for biodiesel production by a two-step process that included the acid (H 2 SO 4)-catalyzed pre-esterification of strawberry oil, followed by the base (KOH)-catalyzed transesterification of the pre-esterified strawberry oil. Further, the methanolysis ensured a biodiesel content of 97.2% in 30 min. However, the low yield of this technology's final product and physicochemical characterization showed that strawberry oil should be used in a mixture with other oils (hybrid oil) for biodiesel production, or in the cosmetics and food industry.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87277760","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}
A.R.H. Juma, B. Todorović, Dragana Stojiljković, Ljubiša Nikolić, Tanja Petrović-Pantić, P. Premović
The Vrška Čuka anthracite shows contents of 16% inorganic compound and 84% organic matter, out of which 82% is kerogen and <2% is bitumen. X-ray diffraction (XRD) indicates the presence of the graphitic structures. The electron spin resonance (ESR) shows a high concentration of polyaromatic paramagnetic structures (PPS; 4.5×10 19 spins g-1). The Fourier transform infrared spectroscopy (FTIR) reveal that the Vrška Čuka kerogen contains predominantly aromatic/polyaromatic structures. Analysis of the aromatic area shows both the absence of aromatic substituents and the presence of aromatic polycondensation (average 3-4 rings; ≥17 carbon atoms). The spectrum also shows considerably reduced absorptions corresponding to the presence of aliphatic groups. Most of the aliphatic carbon is present as CH 3 (probably in short alkyl chains-methyl/methylene attached to polyaromatic structures) as indicated by the CH 3 /CH 2 value 0.7 of the appropriate absorptions. It was suggested that polyaromatic structures were formed by poly-condensation of aromatics during kerogen maturation. Low atomic values of H/C and O/C (0.45 and 0.07) indicate a high degree of genesis (metagenesis). The result of these analyzes are in agreement with each other and show that the maturation of this kerogen led to the formation of polyaromatic structures from aromatic.
{"title":"Polyaromatic structure in the kerogen from anthracite at Vrška Čuka (Carpatho-Balkan region, Serbia)","authors":"A.R.H. Juma, B. Todorović, Dragana Stojiljković, Ljubiša Nikolić, Tanja Petrović-Pantić, P. Premović","doi":"10.5937/savteh2301038j","DOIUrl":"https://doi.org/10.5937/savteh2301038j","url":null,"abstract":"The Vrška Čuka anthracite shows contents of 16% inorganic compound and 84% organic matter, out of which 82% is kerogen and <2% is bitumen. X-ray diffraction (XRD) indicates the presence of the graphitic structures. The electron spin resonance (ESR) shows a high concentration of polyaromatic paramagnetic structures (PPS; 4.5×10 19 spins g-1). The Fourier transform infrared spectroscopy (FTIR) reveal that the Vrška Čuka kerogen contains predominantly aromatic/polyaromatic structures. Analysis of the aromatic area shows both the absence of aromatic substituents and the presence of aromatic polycondensation (average 3-4 rings; ≥17 carbon atoms). The spectrum also shows considerably reduced absorptions corresponding to the presence of aliphatic groups. Most of the aliphatic carbon is present as CH 3 (probably in short alkyl chains-methyl/methylene attached to polyaromatic structures) as indicated by the CH 3 /CH 2 value 0.7 of the appropriate absorptions. It was suggested that polyaromatic structures were formed by poly-condensation of aromatics during kerogen maturation. Low atomic values of H/C and O/C (0.45 and 0.07) indicate a high degree of genesis (metagenesis). The result of these analyzes are in agreement with each other and show that the maturation of this kerogen led to the formation of polyaromatic structures from aromatic.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82715597","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}
Predrag Tasic, D. Trajković, J. Geršak, S. Golubović
The influence of environmental conditions on the thermo-physiological comfort of men's socks was investigated using an objective assessment of comfort under dynamic conditions. Men's socks made in a 3:1 rib construction from three types of basic yarns (77%) were used: bamboo, cotton, and a cotton/polyester blend. The remaining composition of the socks is identical: filament polyamide yarn (22%) and wrapped rubber thread (1%) for the welt. The influence of climate factors artificially created in the climate chamber was analyzed by measuring three physiological parameters: skin temperature, relative humidity of the skin, and microclimate in the space between the sock and the shoe on both feet. The research results show that the raw material composition of the base yarn used in the manufacture of men's socks has a significant impact on thermo-physiological comfort when wearing socks. Under artificially created conditions in the climate chamber, an ambient temperature of 20 °C and relative humidity of 50% (autumn and spring conditions), socks with basic yarn made of a cotton/polyester blend are preferred, then with a base yarn made of cotton, and finally socks with a base yarn made of bamboo. The data from the study provide valuable information for the clothing industry in designing and defining the choice of base yarn to produce socks, depending on the conditions of use.
{"title":"The influence of the raw material composition of men's socks on thermo-physiological comfort under dynamic conditions","authors":"Predrag Tasic, D. Trajković, J. Geršak, S. Golubović","doi":"10.5937/savteh2301044t","DOIUrl":"https://doi.org/10.5937/savteh2301044t","url":null,"abstract":"The influence of environmental conditions on the thermo-physiological comfort of men's socks was investigated using an objective assessment of comfort under dynamic conditions. Men's socks made in a 3:1 rib construction from three types of basic yarns (77%) were used: bamboo, cotton, and a cotton/polyester blend. The remaining composition of the socks is identical: filament polyamide yarn (22%) and wrapped rubber thread (1%) for the welt. The influence of climate factors artificially created in the climate chamber was analyzed by measuring three physiological parameters: skin temperature, relative humidity of the skin, and microclimate in the space between the sock and the shoe on both feet. The research results show that the raw material composition of the base yarn used in the manufacture of men's socks has a significant impact on thermo-physiological comfort when wearing socks. Under artificially created conditions in the climate chamber, an ambient temperature of 20 °C and relative humidity of 50% (autumn and spring conditions), socks with basic yarn made of a cotton/polyester blend are preferred, then with a base yarn made of cotton, and finally socks with a base yarn made of bamboo. The data from the study provide valuable information for the clothing industry in designing and defining the choice of base yarn to produce socks, depending on the conditions of use.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81735196","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}
Aleksandra Adamović, M. Petronijević, S. Panić, D. Cvetković, I. Antić, Z. Petrović, N. Đurišić-Mladenović
Carbon materials have been used extensively in water treatment, and among them, biochar (BC) and hydrochar (HC) have been studied in recent decades as eco-friendly adsorbents in water treatment. Specific physicochemical characteristics of chars allow for the effective removal of a wide range of water contaminants, including emerging contaminants (e.g. pharmaceutically active compounds, agro-chemicals, and endocrine disrupting compounds). BC and HC can be synthesized from different biomass sources, even from biowaste, which makes them low-cost materials. In fact, the application of waste biomass for char production can be designated as a promising way towards achieving sustainable development goals concerning solid waste management. The selection of feedstock material and optimization of the reaction conditions of the carbonization process (pyrolysis, hydro-thermal carbonisation, etc.) influence the performances of char-based materials leading to the products with desired characteristics suitable for the removal of a certain group of compounds. The objective of this review is to provide an overview of the current status of research regarding the use of BC and HC as adsorbents in the removal of contaminants of emerging concern (CECs) from wastewater. The physicochemical properties of the substrates, types of synthesis, characterization techniques, as well as mechanism and influence of process parameters in the removal of selected CECs from wastewater, will also be addressed.
{"title":"Biochar and hydrochar as adsorbents for the removal of contaminants of emerging concern from wastewater","authors":"Aleksandra Adamović, M. Petronijević, S. Panić, D. Cvetković, I. Antić, Z. Petrović, N. Đurišić-Mladenović","doi":"10.5937/savteh2301057a","DOIUrl":"https://doi.org/10.5937/savteh2301057a","url":null,"abstract":"Carbon materials have been used extensively in water treatment, and among them, biochar (BC) and hydrochar (HC) have been studied in recent decades as eco-friendly adsorbents in water treatment. Specific physicochemical characteristics of chars allow for the effective removal of a wide range of water contaminants, including emerging contaminants (e.g. pharmaceutically active compounds, agro-chemicals, and endocrine disrupting compounds). BC and HC can be synthesized from different biomass sources, even from biowaste, which makes them low-cost materials. In fact, the application of waste biomass for char production can be designated as a promising way towards achieving sustainable development goals concerning solid waste management. The selection of feedstock material and optimization of the reaction conditions of the carbonization process (pyrolysis, hydro-thermal carbonisation, etc.) influence the performances of char-based materials leading to the products with desired characteristics suitable for the removal of a certain group of compounds. The objective of this review is to provide an overview of the current status of research regarding the use of BC and HC as adsorbents in the removal of contaminants of emerging concern (CECs) from wastewater. The physicochemical properties of the substrates, types of synthesis, characterization techniques, as well as mechanism and influence of process parameters in the removal of selected CECs from wastewater, will also be addressed.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76963425","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}
Gas chromatography coupled with mass spectrometry (GC/MS) is commonly applied in pesticide residue analysis in fruit samples. Sample extracts with a high quantity of co-extractives represent a standing problem in such analysis. Co-extractives mainly affect the GC inlet and the chromatographic column performance. Waxes, identified as the main co-extractives from the apple matrix, represent a significant problem in GC/MS analysis due to low volatility and non-polarity. The purpose of this investigation was to develop and evaluate a simplified method for the analysis of boscalid in apples, with the removal of wax compounds as the main outcome. The waxes herein represented a problem not only for the performance of the instrument but directly for the determination of the boscalid since they co-eluted with the pesticide. The applied method included a combination of solvent exchange and low-temperature precipitation and resulted in complete wax removal.
{"title":"A simple solution for boscalid selectivity issue in GC/MS analysis of apples","authors":"Darko Anđelković, Milica Branković","doi":"10.5937/savteh2301051a","DOIUrl":"https://doi.org/10.5937/savteh2301051a","url":null,"abstract":"Gas chromatography coupled with mass spectrometry (GC/MS) is commonly applied in pesticide residue analysis in fruit samples. Sample extracts with a high quantity of co-extractives represent a standing problem in such analysis. Co-extractives mainly affect the GC inlet and the chromatographic column performance. Waxes, identified as the main co-extractives from the apple matrix, represent a significant problem in GC/MS analysis due to low volatility and non-polarity. The purpose of this investigation was to develop and evaluate a simplified method for the analysis of boscalid in apples, with the removal of wax compounds as the main outcome. The waxes herein represented a problem not only for the performance of the instrument but directly for the determination of the boscalid since they co-eluted with the pesticide. The applied method included a combination of solvent exchange and low-temperature precipitation and resulted in complete wax removal.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78745298","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}
Kristina Filipović, M. Kostić, S. Najdanović, Miljana Radović-Vučić, N. Velinov, D. Bojić, A. Bojić
A variety of strategies were used to study the best ways to remove pollutants from water, whereupon it turned out that sorption techniques are among the most effective and economically viable processes. Due to numerous applications, including the removal of dyes from wastewater by sorption method, layered double hydrox-ides (LDHs) have been extensively investigated in recent times. Several features of LDHs, such as the ability of anion exchange, tunable structure and high specific surface area make them highly efficient sorption materials and suggest LDHs for water purification. Methyl orange has been used as a model pollutant in most studies of the sorption properties of LDH, as a result of its widespread use. The influence of several factors including pH, contact time and initial dye concentration on methyl orange removal by various LDH materials have been reviewed in detail.
{"title":"Effects of pH, contact time and initial dye concentration on methyl orange sorption via layered double hydroxides","authors":"Kristina Filipović, M. Kostić, S. Najdanović, Miljana Radović-Vučić, N. Velinov, D. Bojić, A. Bojić","doi":"10.5937/savteh2301075f","DOIUrl":"https://doi.org/10.5937/savteh2301075f","url":null,"abstract":"A variety of strategies were used to study the best ways to remove pollutants from water, whereupon it turned out that sorption techniques are among the most effective and economically viable processes. Due to numerous applications, including the removal of dyes from wastewater by sorption method, layered double hydrox-ides (LDHs) have been extensively investigated in recent times. Several features of LDHs, such as the ability of anion exchange, tunable structure and high specific surface area make them highly efficient sorption materials and suggest LDHs for water purification. Methyl orange has been used as a model pollutant in most studies of the sorption properties of LDH, as a result of its widespread use. The influence of several factors including pH, contact time and initial dye concentration on methyl orange removal by various LDH materials have been reviewed in detail.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80510884","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}
D. Veličković, Milanka Jevtić, N. Milosavljević, D. Stanisavljević, D. Davidović, S. Đorđević, M. Nikolova
The parameters of herbal drugs that are important for technological processes, especially for extraction and distillation processes were examined: bulk density, tapped density, compressibility index, Hausner ratio, and solvent absorption power. The methods described in the pharmacopoeia were used for the examination. Based on the values of bulk density and tapped density, the volume of the device is planned, ie. the size of the batch for extraction or distillation. These parameters were shown to have lower values for flower, leaf and herb, and higher values for fruit and root. Also, the compressibility index depends on the degree of fragmentation and the Hausner ratio. The results showed that these parameters have lower values for fruit and root. Solvent absorption power is the volume of solvent absorbed by a certain amount of herbal drug. Two solvents with differences in concentration were used: ethanol (aqueous solution: 96 vol.%, 70 vol.% and 50 vol.%) and distilled water. At the end of the technological process, a part of the solvent/ extract can be extracted from the spent plant material by pressing or vacuum filtration. The other part is difficult to get rid of the spent plant material and is irreversibly thrown away. In all tested herbal drugs, it is noticeable that the solvent absorption power increases with the increasing polarity of the solvent. Also, the less polar solvent EtOH 96% is more selective in terms of plant part. As the polarity of the solvent increases, it does not matter which part of the plant is extracted.
{"title":"Experimental investigation of technological parameters of herbal drugs for the extraction and distillation process","authors":"D. Veličković, Milanka Jevtić, N. Milosavljević, D. Stanisavljević, D. Davidović, S. Đorđević, M. Nikolova","doi":"10.5937/savteh2301029v","DOIUrl":"https://doi.org/10.5937/savteh2301029v","url":null,"abstract":"The parameters of herbal drugs that are important for technological processes, especially for extraction and distillation processes were examined: bulk density, tapped density, compressibility index, Hausner ratio, and solvent absorption power. The methods described in the pharmacopoeia were used for the examination. Based on the values of bulk density and tapped density, the volume of the device is planned, ie. the size of the batch for extraction or distillation. These parameters were shown to have lower values for flower, leaf and herb, and higher values for fruit and root. Also, the compressibility index depends on the degree of fragmentation and the Hausner ratio. The results showed that these parameters have lower values for fruit and root. Solvent absorption power is the volume of solvent absorbed by a certain amount of herbal drug. Two solvents with differences in concentration were used: ethanol (aqueous solution: 96 vol.%, 70 vol.% and 50 vol.%) and distilled water. At the end of the technological process, a part of the solvent/ extract can be extracted from the spent plant material by pressing or vacuum filtration. The other part is difficult to get rid of the spent plant material and is irreversibly thrown away. In all tested herbal drugs, it is noticeable that the solvent absorption power increases with the increasing polarity of the solvent. Also, the less polar solvent EtOH 96% is more selective in terms of plant part. As the polarity of the solvent increases, it does not matter which part of the plant is extracted.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83635491","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}
A. Radović, P. Vukosavljević, Teodora Radenković, Sofija Rankov, Ivana T. Karabegović, Jelena Milanović, M. Veljović
Some of the specific characteristics of quince fruits, such as the high content of pectin substances and relatively low content of fermentable sugars, lead to certain challenges during alcoholic fermentation. The aim of this research was to evaluate the effect of quince variety on fermentation dynamics, alcohol yield and chemical composition of produced spirits. Nine quince varieties grown at the experimental field "Radmilovac" (University of Belgrade - Faculty of Agriculture), were used in this study: Vranjska (SRB), Leskovačka (SRB), Morava (SRB), Pazardžijska (BLG), Hemus (BLG), Asenica (BLG), Portugal (POR), Triumph (BLG) and Rea's Mammoth (USA). The investigation was carried out in 2018. Soluble solids content in quince fruits was in the range from 12.90% (Pazardžijska) to 16.80% (Morava). Total sugars and total acids expressed as malic acid were in the range from 6.74 % and 0.53% w/w (Pazardžijska) to 9.76 % and 1.27% w/w (Morava), respectively. The highest alcohol content had spirits made from quince varieties Leskovačka and Asenica (9.88 litres of 40% vol. alcohol from 100kg of fruit), while the lowest alcohol content had spirit made from variety Rea's Mammoth (7.20 litres of 40% vol. alcohol from 100 kg of fruit). All spirit samples had methanol content (up to 1350 g/hl, calculated at 100% of alcohol) and other quality parameters in accordance with the legal regulations.
{"title":"Influence of quince variety on alcohol content and quality of spirit","authors":"A. Radović, P. Vukosavljević, Teodora Radenković, Sofija Rankov, Ivana T. Karabegović, Jelena Milanović, M. Veljović","doi":"10.5937/savteh2202048r","DOIUrl":"https://doi.org/10.5937/savteh2202048r","url":null,"abstract":"Some of the specific characteristics of quince fruits, such as the high content of pectin substances and relatively low content of fermentable sugars, lead to certain challenges during alcoholic fermentation. The aim of this research was to evaluate the effect of quince variety on fermentation dynamics, alcohol yield and chemical composition of produced spirits. Nine quince varieties grown at the experimental field \"Radmilovac\" (University of Belgrade - Faculty of Agriculture), were used in this study: Vranjska (SRB), Leskovačka (SRB), Morava (SRB), Pazardžijska (BLG), Hemus (BLG), Asenica (BLG), Portugal (POR), Triumph (BLG) and Rea's Mammoth (USA). The investigation was carried out in 2018. Soluble solids content in quince fruits was in the range from 12.90% (Pazardžijska) to 16.80% (Morava). Total sugars and total acids expressed as malic acid were in the range from 6.74 % and 0.53% w/w (Pazardžijska) to 9.76 % and 1.27% w/w (Morava), respectively. The highest alcohol content had spirits made from quince varieties Leskovačka and Asenica (9.88 litres of 40% vol. alcohol from 100kg of fruit), while the lowest alcohol content had spirit made from variety Rea's Mammoth (7.20 litres of 40% vol. alcohol from 100 kg of fruit). All spirit samples had methanol content (up to 1350 g/hl, calculated at 100% of alcohol) and other quality parameters in accordance with the legal regulations.","PeriodicalId":7216,"journal":{"name":"Advanced Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78277783","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}
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