Advanced Technologies最新文献_第2页

'Boswellia serrata' resin isolates: Chemical composition and pharmacological activities “锯齿波士韦利亚”树脂分离物:化学成分和药理活性

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201076t

Natalija Tošić, V. Nikolić, Vojkan Miljković, L. Nikolić

引用次数: 0

Chemical composition and antioxidant activity of immortelle ('Helichrysum italicum') (Roth) G. Don) and yarrow ('Achillea millefolium' L.) essential oils 不朽草('Helichrysum italicum') (Roth) G. Don)和蓍草('Achillea millefolium' L.)精油的化学成分和抗氧化活性

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201093s

J. Stanojević, L. Stanojević, V. Bulatović, J. Zvezdanović, A. Milenković, Nataša Simonović, D. Cvetković

{"title":"Chemical composition and antioxidant activity of immortelle ('Helichrysum italicum') (Roth) G. Don) and yarrow ('Achillea millefolium' L.) essential oils","authors":"J. Stanojević, L. Stanojević, V. Bulatović, J. Zvezdanović, A. Milenković, Nataša Simonović, D. Cvetković","doi":"10.5937/savteh2201093s","DOIUrl":"https://doi.org/10.5937/savteh2201093s","url":null,"abstract":"The present study aimed to determine the chemical composition and antioxidant activity of immortelle (Helichrysum italicum (Roth) G. Don) and yarrow (Achillea millefolium L.) essential oils isolated from the aerial plant parts on a semi-industrial scale by steam and water-steam distillation, respectively. The qualitative composition of the essential oils obtained was determined by GC/MS and their quantitative composition by GC/FID method. Their antioxidant activity was estimated by using DPPH, ABTS and FRAP assays. The most abundant components in the immortelle essential oil were a-pinene (22.4%), g-curcumene (13.2%), neryl acetate (9.8%) and b-selinene (8.7%), while yarrow essential oil contained 1,8-cin-eole (25.5%), CIS-thujone (10.8%), camphor (7.3%) and artemisia ketone (6.9%) in the highest percentage. According to the EC 50 values yarrow essential oil showed better radical (DPPH and ABTS) scavenging activity than immortelle essential oil (7.71 mg/cm 3 vs. 8.94 mg/cm 3 after 20 minutes of incubation with DPPH radical ; and 26.03 mg/cm 3 vs. 88.52 mg/cm 3 after 24 minutes incubation with ABTS radical, respectively). On the other hand, immortelle essential oil showed better ferric ion reducing power (7.16 mgEFe2+/g vs. 5.72 mgEFe2+/g essential oil) in comparison to yarrow essential oil. However, the results obtained indicated a low antioxidant activity of both essential oils studied.","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":"89361162","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

Grinding of Serbian peppermint ('Mentha' × 'piperita L.') leaves: Variations regarding yield, composition and antimicrobial activity of isolated essential oil 塞尔维亚薄荷('Mentha' × 'piperita L.')叶子的研磨:分离精油的产量、成分和抗菌活性的变化

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201005i

Dušica P. Ilić, J. Stanojević, D. Cvetković, I. Ristić, V. Nikolić

引用次数: 1

Environmental innovative technology, CO2 , and green energy 环保创新技术，二氧化碳，绿色能源

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201032p

T. Petrović, Silvana Ilic, G. Đukić

引用次数: 0

Analysis of the influence of pre-treatment with liquid hot water (LHW) on the chemical composition of wooden chips 液体热水预处理对木屑化学成分的影响分析

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2202040d

Aleksandar Drpić, J. Popović, Mlađan Popović, Milanka Điporović-Momčilović

{"title":"Analysis of the influence of pre-treatment with liquid hot water (LHW) on the chemical composition of wooden chips","authors":"Aleksandar Drpić, J. Popović, Mlađan Popović, Milanka Điporović-Momčilović","doi":"10.5937/savteh2202040d","DOIUrl":"https://doi.org/10.5937/savteh2202040d","url":null,"abstract":"The goal of this paper is to analyze the chemical composition of untreated and treated wooden chips from the native narrow-leaved ash (Fraxinus angustifolia Vahl. ssp. Pannonica Soó & Simon). In order to determine the effect of pretreatment with liquid hot water (LHW) on changes in chemical composition, the content of moisture, cellulose, lignin, minerals (ash), extractives soluble in hot water, extractives soluble in organic solvents, for treated and for untreated wooden chips was determined. This was done in accordance with TAPPI and ASTM standard methods. The properties of wooden chips, treated for 30 min and 60 min at a temperature of 100 °C, are compared to untreated wooden chips and changes in the chemical composition that occurred are defined as a result of the applied treatments. The research was performed under controlled conditions in a laboratory, and the results of treatments were the subject of comparative analysis. Applied treatments had a statistically significant effect on decreasing the content of extractives. The content of cellulose and hemicellulose increased in the treated wooden chips compared to untreated wooden chips, while the lignin content did not significantly change.","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":"73113170","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

Biofunctional textile materials: Cosmetic textiles 生物功能纺织材料:化妆品纺织品

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201063r

N. Ristic, Dragana Marković-Nikolić, A. Zdravković, Ivanka Mičić, I. Ristić

引用次数: 1

Triple quadrupole vs ion trap sensitivity in a multiresidue pesticides analysis in selected fruit and vegetables 三联四极杆与离子阱在果蔬多残留农药分析中的敏感性比较

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201045a

Darko Anđelković, Milica Branković

{"title":"Triple quadrupole vs ion trap sensitivity in a multiresidue pesticides analysis in selected fruit and vegetables","authors":"Darko Anđelković, Milica Branković","doi":"10.5937/savteh2201045a","DOIUrl":"https://doi.org/10.5937/savteh2201045a","url":null,"abstract":"Mass spectrometry stands for highly selective and sensitive instrumental technique ; therefore, it has many applications in various scientific fields. Sensitivity is usually defined as the change in measured signal per unit change in analyte concentration. Several factors such as the effective sample preparation, mobile phase composition, chromatographic column parameters and mass spectrometer features can affect this parameter. By keeping rest of the parameters the same, the effect of mass spectrometer features on the sensitivity of multi-residue pesticides analysis was investigated. Linear ion trap and triple quadrupole, as the two most exploited mass analyzers, were compared. The comparison of sensitivity for solvent-based and QuEChERS treated fruit-and vegetable-based pesticides standards demonstrated triple quadrupole as a highly sensitive instrument. The analysis of solvent-based standards on the triple quadrupole was from 4 to 71 times more sensitive than the analysis on the linear ion trap. Sensitivity enhancement for lemon-based standards ranged from 15 to 138 times, and for vegetable-based standards (tomato, lettuce, cucumber) it ranged from about 5 to about 70 times, when shifting from linear ion trap to triple quadrupole. Sensitivity comparison for solvent-and sample-based standards majorly evidenced the presence of a strong matrix effect, thus reflecting the need to perform analytes quantification against sample-based standards in an actual sample analysis.","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":"82696207","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

Improvement of thermophysiological comfort of athletes based on thermographic evaluation of sportswear material 基于运动服装材料热成像评价的运动员热生理舒适度的改善

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2202055s

I. Salopek-Cubric, Dominika Rosić, A. Petrov

引用次数: 0

Graphene composites with hydrogel 石墨烯水凝胶复合材料

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201053e

Zorica B. Eraković

{"title":"Graphene composites with hydrogel","authors":"Zorica B. Eraković","doi":"10.5937/savteh2201053e","DOIUrl":"https://doi.org/10.5937/savteh2201053e","url":null,"abstract":"Composites are multiphase materials consisting of two or more different materials with different properties that are firmly bound to each other on the surface. As new nanomaterials, graphene and graphene oxide are particularly interesting due to their ability to form composites and nanocomposites with hydrogels. Graphene has attracted a lot of attention. Hydrogels are materials that have a three-dimensional structure, capable of absorbing a large amount of surrounding fluid without dissolving. Stimuli-sensitive hydrogels can change a physical property in response to external stimuli. Hydrogels based on monomers such as N, N-diethylacrylamide, and N-(2-hydroxyethyl) acrylamide exhibit great scientific and technological importance. They have found application in the paint and varnish industry, the pharmaceutical , cosmetic, food industry, agro-industry, and textile industries. Previous research has proven that graphene significantly boosts the electrical, thermal, and mechanical properties of hydrogels. Hydrogelcomposites with graphene have a porous structure. The paper represents a literature overview of methods for the synthesis and characterization of synthesized hydrogels and hydrogel composites with graphene and graphene oxide.","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":"83516415","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

The valorization of plum seed oil for the development of topical formulation 李子油在外用制剂开发中的应用价值

Advanced Technologies Pub Date : 2022-01-01 DOI: 10.5937/savteh2201022s

I. Savić-Gajić, I. Savić, N. Cekić, Dragica Đorđević, M. Bogićević

{"title":"The valorization of plum seed oil for the development of topical formulation","authors":"I. Savić-Gajić, I. Savić, N. Cekić, Dragica Đorđević, M. Bogićević","doi":"10.5937/savteh2201022s","DOIUrl":"https://doi.org/10.5937/savteh2201022s","url":null,"abstract":"The object of this paper was to utilize the plum seed oil for the preparation of the topical formulation for skin care since it can improve elasticity and prevent accelerated skin aging. Soxhlet extraction of plum seed oil was performed using n-hep-tane. The spectrophotometric methods were applied to estimate the photoprotec-tive effect and antioxidant activity of the samples. The warm-warm emulsification process was used for the preparation of topical formulation based on plum seed oil. The antioxidant activity of the plum seed oil was estimated based on the half-maximal inhibitory concentration (9.39 mg/mL). After the incorporation of the oil in the topical formulation, the IC 50 value of 9.33 mg/mL was not significantly changed. The viscosities of the topical formulation and plum seed oil were 1.56×10 6 mPa·s (at the shear rate of 5 s-1) and 60.48 mPa·s (at the shear rate of 50 s-1), respectively. Rheological analysis showed that the plum seed oil and topical formulation were Newtonian and non-Newtonian pseudoplastic fluids, respectively. The formulation adsorbed the light in the UV-Vis range so that it can be used as a w/o emulsion photoprotective cream. The cream with adequate pH value was stable and micro-biologically safe for application to the skin. Due to the use of cheaper ingredients, the formulation is acceptable and suitable for manufacturing.","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":"77822825","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