Advanced Technologies最新文献_第5页

The chemical composition of the essential oil and volatile compounds from caraway fruit (Carum carvi L.) extracted by headspace-solid phase microextraction and the antioxidant activity 研究了顶空-固相微萃取法提取香菜果实精油和挥发物的化学成分及其抗氧化活性

Advanced Technologies Pub Date : 2020-01-01 DOI: 10.5937/savteh2001037g

I. Gajić, L. Stanojević, A. Dinić, J. Stanojević, L. Nikolić, V. Nikolić, V. Savic

{"title":"The chemical composition of the essential oil and volatile compounds from caraway fruit (Carum carvi L.) extracted by headspace-solid phase microextraction and the antioxidant activity","authors":"I. Gajić, L. Stanojević, A. Dinić, J. Stanojević, L. Nikolić, V. Nikolić, V. Savic","doi":"10.5937/savteh2001037g","DOIUrl":"https://doi.org/10.5937/savteh2001037g","url":null,"abstract":"The aim of this study was to isolate the essential oil from ripe and disintegrated caraway fruit by Clevenger-type hydrodistillation, to determine its qualitative and quantitative composition and to examine its antioxidant activity, as well as to determine the qualitative and quantitative chemical composition of the caraway volatile compounds extracted by HS-SPME technique. The essential oil from disintegrated caraway fruit was obtained by Clevenger-type hydrodistillation with hydromodulus 1:10 m/V during 180 minutes. Volatile compounds from caraway fruit were extracted by headspace-solid phase microextraction (HS-SPME) using 75 μm fiber coated with Carboxen®/Polydimethylsiloxane (PDMS). The qualitative and quantitative composition of the essential oil and volatile compounds was determined by gas chromatography coupled with mass spectrometry (GC-MS) and flame ionization detection (GC-FID). Twenty-seven different compounds were separated and identified in the essential oil. Twenty-six compounds were identified in the volatiles extracted by HS-SPME. The most abundant compounds in both examined samples were limonene and carvone. The content of carvone in the essential oil was 72%, while the limonene content was 25.6%. In the volatiles obtained by HS-SPME, the limonene was present with 72.1% and carvone with 24.6%. The difference in the chemical composition is due to the oxidation of limonene to carvone during the hydrodistillation. The antioxidative activity of the caraway essential oil was determined by using DPPH assay immediately after adding DPPH radical and after 20 and 40 min of incubation with the radical. The caraway fruit essential oil showed a satisfactory antioxidant activity. The oil incubated for 40 min (EC50=4.6 mg/cm3) showed the best antioxidant activity.","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":"76812641","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: 4

Chemical composition, antioxidative and antimicrobial activity of allspice (Pimenta dioica (L.) Merr.) essential oil and extract 多香果(Pimenta dioica (L.))的化学成分、抗氧化和抗菌活性)精油和提取物

Advanced Technologies Pub Date : 2020-01-01 DOI: 10.5937/savteh2001027m

A. Milenković, J. Stanojević, Z. Stojanović-Radić, Milica G. Pejčić, D. Cvetković, J. Zvezdanović, L. Stanojević

{"title":"Chemical composition, antioxidative and antimicrobial activity of allspice (Pimenta dioica (L.) Merr.) essential oil and extract","authors":"A. Milenković, J. Stanojević, Z. Stojanović-Radić, Milica G. Pejčić, D. Cvetković, J. Zvezdanović, L. Stanojević","doi":"10.5937/savteh2001027m","DOIUrl":"https://doi.org/10.5937/savteh2001027m","url":null,"abstract":"Allspice (Pimenta dioica (L.) Merr.) fruit was used for the essential oil and ethanolic extract isolation in the present study. The essential oil was obtained by Clevenger-type hydrodistillation from allspice fructus with hydromodule 1:10 m/v during 180 minutes, while the ethanolic extract was obtained by reflux extraction at the boiling temperature with solvomodule 1:10 m/v during 120 minutes. The qualitative and quantitative composition of the essential oil was determined by GC/MS and GC/FID methods, respectively. The total phenolic and total flavonoid content in the extract was determined according to the Folin-Ciocalteu and aluminium chloride methods, respectively the antioxidant activity of allspice fructus essential oil and the extract was determined spectrophotometrically by DPPH assay and the antimicrobial activity using the microdilution method on the following microorganisms: two types of bacteria (Bacillus cereus, Salmonella spp.) and one yeast (Candida albicans), pairs of reference strains and their isolates. The obtained results proved the presence of 20 components in the essential oil, mainly oxygenated monoterpenes. The extract and essential oil have shown the best antioxidant activities after 20 and 60 minutes of incubation with EC50 values of 0.011 mg/cm³ and 0.023 mg/cm³, respectively. Both the essential oil and the extract have shown an inhibitory effect on all investigated microorganisms. Allspice ethanolic extract showed a better inhibitory effect on B. cereus and S. enterica (isolate and ATCC strains) than the essential oil. On the other side, allspice essential oil showed a better inhibitory effect on C. albicans strains. The results obtained indicate that both the essential oil and the extract isolated from allspice fructus are a good source of natural antioxidants and antimicrobial agents with potential applications in food and pharmaceutical industries as a safer alternative to the synthetic additives.","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":"81456749","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: 7

Kinetics of the adsorption of textile disperse dye to modified polyethylene terephthalate 纺织分散染料对改性聚对苯二甲酸乙二醇酯的吸附动力学

Advanced Technologies Pub Date : 2020-01-01 DOI: 10.5937/savteh2001058k

Marija Kodrić, Radica Kristić, I. Ristić, M. Nikodijević, D. Đorđević

{"title":"Kinetics of the adsorption of textile disperse dye to modified polyethylene terephthalate","authors":"Marija Kodrić, Radica Kristić, I. Ristić, M. Nikodijević, D. Đorđević","doi":"10.5937/savteh2001058k","DOIUrl":"https://doi.org/10.5937/savteh2001058k","url":null,"abstract":"Kinetics of the dyeing process of modified polyethylene terephthalate with disperse dye are shown in this paper. The modification of the fibers was performed with an aqueous solution of slaked lime with the simultaneous action of ultrasonic waves. The dyeing of the fibers was performed in a discontinuous-batch process, with a change in the initial dye concentration (20 120 mg dm-3) and dyeing time (5 60 min). Several kinetic reactions (Pseudo first, Avrami and Modified Freundlich) and diffusion models (Weber&Morris, Boyd, and Film diffusion) were used to test the experimental data from the dyeing process. It has been found that dyeing of modified fibers gives better results than dyeing of unmodified polyester, under the same conditions. With the increase of the initial dye concentration, a degree of exhaustion decreases (76,2 57,4 %, for equilibrium time of dyeing) and the absorption of disperse dyes per unit mass of fibers increases (1,5 6,9 mg g-1, for equilibrium time of dyeing). During the dyeing process, the initial concentration of the dye decreases, whereas the capacity of the adsorption increases. A linear simulation of the kinetic dyeing parameters showed that the Modified Freundlich reaction model dominated, while of the kinetic diffusion models the Boyd equation was most favorable.","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":"88093540","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

Common birch (Betula pendula Roth.): Chemical composition and biological activity of isolates 普通桦树(Betula pendula Roth.):分离物的化学成分和生物活性

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901065V

M. Vladimirov, V. Nikolić, L. Stanojević, L. Nikolić, Ana Tačić

{"title":"Common birch (Betula pendula Roth.): Chemical composition and biological activity of isolates","authors":"M. Vladimirov, V. Nikolić, L. Stanojević, L. Nikolić, Ana Tačić","doi":"10.5937/SAVTEH1901065V","DOIUrl":"https://doi.org/10.5937/SAVTEH1901065V","url":null,"abstract":"The common birch (Betula pendula Roth., Betulaceae) is widespread in moderate and northern climatic zones. It is used in traditional medicine of many countries, and its positive effects on human health were recognized a long time ago. It belongs to a group of medicinal plants. Numerous studies on the chemical composition and activity of the birch isolates are aimed at confirming their biological effects and the use in traditional medicine. A large number of bioactive compounds have been isolated from buds, juice (sap), leaves and bark of common birch. The composition varies depending on the variety, age of the plant, geographical area, the methods of isolation and the analysis used. However, the chemical composition of the isolates has been partially studied, and further investigations are required. Anti-inflammatory, antimicrobial, antiviral, antioxidant, antiproliferative, antirheumatoid, uteroprotective, antiallergic and gastroprotective activity of the isolates have been established. That opens the possibility of its potential use in the prevention and treatment of a wide spectrum of diseases. Further preclinical and clinical studies are needed in order to create and apply preparations based on common birch isolates.","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":"75717243","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: 8

Chemical composition of Hypericum rochelii griseb. & schenk headspace volatiles 金丝桃的化学成分。&申克顶空挥发物

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902026q

A. Đorđević, G. Stojanović

引用次数: 1

Determination of the mineral content of spices by ICP-OES ICP-OES法测定香料中矿物质含量

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901027S

S. Savić, S. Petrović, M. Petronijević, A. Cvetanović, Ž. Petronijević

{"title":"Determination of the mineral content of spices by ICP-OES","authors":"S. Savić, S. Petrović, M. Petronijević, A. Cvetanović, Ž. Petronijević","doi":"10.5937/SAVTEH1901027S","DOIUrl":"https://doi.org/10.5937/SAVTEH1901027S","url":null,"abstract":"Spices represent all edible plant parts used for food flavouring or colouring including fruits, roots, seeds, peels or vegetable substances. The objective of this study was to determine the elemental composition (Ag, Al, B, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, In, K, Li, Mg, Mn, Na, Ni, Pb, Sr, Tl and Zn) of selected spices available in the local markets on Serbian territory. The presence of heavy metals in spices is of particular importance because this could result in the accumulation of these elements in human organs, which further might cause different health problems. The analysed spice samples were curcuma, star anise, cinnamon, ginger, coriander, cardamom, sesame, black pepper, chilli and curry. The preparation of the samples was done by wet digestion. The concentrations of elements after digestion were determined by Inductively Coupled Plasma ‒ Optical Emission Spectrometry (ICP-OES). In the group of spices macroelements, from all examined elements the calcium concentration was the highest (182.25 ‒ 3968.79 mg/kg), about 83%. From the heavy metals group, aluminium was most present in the range of 0.0-10.78 mg/kg, while cadmium and nickel were detected in almost negligible amounts.","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":"87692652","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

Contemporary dental materials 当代牙科材料

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901078K

M. Kostić, L. Nikolić

引用次数: 1

Synthesis, characterization and antioxidant activity of silver nanoparticles stabilized by aqueous extracts of wild blackberry (Rubus spp.) and raspberry (Rubus idaeus L.) leaves 野生黑莓(Rubus spp.)和覆盆子(Rubus idaeus L.)叶水提物稳定纳米银的合成、表征和抗氧化活性

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/SAVTEH1901047S

Marija Stevanović, J. Zvezdanović, L. Stanojević, J. Stanojević, S. Petrović, M. Cakic, D. Cvetković

引用次数: 4

Tetracyclic triterpenoids from Euphorbia nicaeensis All 大戟属四环三萜

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902037k

G. Krstić, M. Novaković, M. Jadranin, V. Tešević

引用次数: 2

Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell 木质纤维素葫芦壳杂型阳离子吸附剂的研制与表征

Advanced Technologies Pub Date : 2019-01-01 DOI: 10.5937/savteh1902046n

G. Nikolić, Dragana Marković-Nikolić, M. Kostić, Miloš Durmišević, M. Cakic

{"title":"Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell","authors":"G. Nikolić, Dragana Marković-Nikolić, M. Kostić, Miloš Durmišević, M. Cakic","doi":"10.5937/savteh1902046n","DOIUrl":"https://doi.org/10.5937/savteh1902046n","url":null,"abstract":"The aim of this study is to develop miscellaneous cationic sorbents based on the lignocellulosic biomass of Lagenaria vulgaris fruit, with the property of efficient sorption of anionic pollutants from aqueous solutions. The lignocellulosic gourd shell (LGS biomass), as a potentially valuable agro-waste, was examined and used for the synthesis of sorbents. The preparation of synthesis precursor (LVAT) was performed by alkaline pretreatment of LGS biomass. Pretreatment under weak alkaline conditions with green carbonate solution was carried out for partial delignification and extraction of depolymerized hemicellulose, thereby achieving higher material porosity and activation of cellulose microfibrils. This activation involves the translation of available –OH functional groups into –ONa form (alkali-cellulose), while maintaining the initial biomass composition. Synthesis of the cationic sorbents was performed in three ways. Different N-reagents, such as tertiary amino and quaternary ammonium compounds, were used in the cation modification of LGS biomass and LVAT precursor, to determine the effects of reagent structure and hydrophobicity on the synthesis outcome, and primarily on the sorption properties of the resulting sorbents. The synthesized cationic sorbents were characterized by physico-chemical methods and tested for the removal of anionic pollutants from water, especially phosphates and nitrates. The various chemical modifications of lignocellulosic biomass provide a scientific contribution to a better understanding of the mechanism of anions sorption on the sorbent surface.","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":"82235964","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