Hemijska Industrija最新文献_第4页

Comparative analysis of functionality of spray dried whey protein hydrolysates obtained by enzymatic and microbial hydrolysis 酶解与微生物水解喷雾干燥乳清蛋白水解产物功能的比较分析

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-10-15 DOI: 10.2298/HEMIND171121019E

Salem Embiriekah, M. Bulatović, M. Gnjatovic, M. Vukasinovic-Sekulic, Tanja Krunic, D. Zarić, Marica Rakin

{"title":"Comparative analysis of functionality of spray dried whey protein hydrolysates obtained by enzymatic and microbial hydrolysis","authors":"Salem Embiriekah, M. Bulatović, M. Gnjatovic, M. Vukasinovic-Sekulic, Tanja Krunic, D. Zarić, Marica Rakin","doi":"10.2298/HEMIND171121019E","DOIUrl":"https://doi.org/10.2298/HEMIND171121019E","url":null,"abstract":"The aim of this study was to examine the bioactive potential of hydrolysate powders produced by enzymatic and microbial hydrolysis of whey proteins followed by spray drying, in order to reveal which one of these processes result in a product with significantly improved functional properties. Hydrolysate powders produced by the two different biotechnological processes were compared based on their antioxidant (DPPH and FTC), antibacterial as well as erythrocyte membrane stabilizing activities. The performed tests revealed that the concentration of at least 178.4 mg mL -1 of the whey protein hydrolysate powder, produced by tryptic digestion, could inhibit the process of lipid peroxidation by 50 %, suppress the microbial contamination caused by S. aureus ATCC25923, B. cereus ATCC 11778 and L. monocytogenes , and provide the antioxidant and membrane stabilizing activities greater than 50 %. On the other hand, the hydrolysate powder obtained by whey fermentation at the concentration of at least 811.5 mg mL -1 achieved 50 % of all tested bioactivities, with the emphasis on the significantly more pronounced antibacterial activity against all tested strains. In that sense, tryptic hydrolysis could be highlighted as an optimal process that provides production of the whey hydrolysate with pronounced bioactive properties that could be considered as a very promising natural food supplement.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49239966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of a kinetic spectrophotometric method for insecticide diflubenzuron determination in water and baby food samples 动态分光光度法测定水和婴儿食品中杀虫剂双氟脲的研究

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-10-15 DOI: 10.2298/HEMIND171224015P

Emilija T. Pecev-Marinković, Z. Grahovac, A. Pavlović, S. Tošić, I. R. Mišić, M. Mitić, Ana S. Miletić, D. Sejmanović

{"title":"Development of a kinetic spectrophotometric method for insecticide diflubenzuron determination in water and baby food samples","authors":"Emilija T. Pecev-Marinković, Z. Grahovac, A. Pavlović, S. Tošić, I. R. Mišić, M. Mitić, Ana S. Miletić, D. Sejmanović","doi":"10.2298/HEMIND171224015P","DOIUrl":"https://doi.org/10.2298/HEMIND171224015P","url":null,"abstract":"A kinetic spectrophotometric method for determining residues of insecticide diflubenzuron 1(4-chlorphenyl)-3-(2,6-diflubenzoyl)urea (DFB) has been developed and validated. Kinetic method was based on the inhibitory effect of DFB on the oxidation reaction of sulfanilic acid (SA) by hydrogen peroxide in the presence of Co 2+ ions in a phosphate buffer, which was monitored at 370 nm. DFB can be measured in the concentration interval 0.102 – 3.40 μg mL -1 and 3.40 – 23.80 μg mL -1 . The detection and quantification limits of the method were calculated according to the 3σ criteria and found to be 0.077 μg mL -1 and 0.254 μg Ml ‑1 , respectively. The relative standard deviations for five replicate determinations of 0.102, 1.70 and 3.40 μg mL -1 DFB were 2.08, 1.22 and 1.21 %, respectively, for the first concentration interval, and the recovery percentage values were from 94.12 to 97.35 %. HPLC method was used as a parallel method to verify results of the kinetic method. The kinetic method was successfully applied to determine diflubenzuron concentrations in spiked water and baby food samples after solid phase extraction of the samples. The F and t values at 95% confidence level are lower than the theoretical ones, confirming agreement of the developed and the HPLC method.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47836517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Welded joints as critical regions in pressure vessels – case study of vinyl-chloride monomer storage tank 焊接接头是压力容器中的关键区域——氯乙烯单体储罐的案例研究

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-07-30 DOI: 10.2298/HEMIND171009006G

T. Golubović, A. Sedmak, V. S. Brkic, S. Kirin, E. Veg

{"title":"Welded joints as critical regions in pressure vessels – case study of vinyl-chloride monomer storage tank","authors":"T. Golubović, A. Sedmak, V. S. Brkic, S. Kirin, E. Veg","doi":"10.2298/HEMIND171009006G","DOIUrl":"https://doi.org/10.2298/HEMIND171009006G","url":null,"abstract":"Welded joints are analysed as critical regions in a pressure vessel in respect to structural failure due to the elastic-plastic fracture/crack growth. To assess structural integrity of pressure vessels used in chemical industry the risk based procedure has been introduced and applied in the case of a large spherical pressure vessel used as a vinyl-chloride monomer (VCM) storage tank in HIP Azotara Pancevo. The risk matrix has been used, taking into account the basic definition of risk, being the product of the probability and consequence, and applied to different regions of welded joints, having different mechanical properties, i.e. crack resistance. To estimate probability, the failure assessment diagram (FAD) has been used, as an engineering tool, defined according to the position of the operating point for different regions of the welded joint, relative to the critical point on the limit curve. Generally speaking, consequence is estimated based on pressure vessel parameters, or by detailed analysis of health, safety, business and security issues, but in the analysed case, the worst case scenario is assumed, with the highest consequence due to potential disaster for environment and fatalities.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2018-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49293895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

An investigation into the effects of excipients on quality characteristics of a dry herbal extract containing capsule 辅料对含胶囊干提取物质量特性影响的研究

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-07-30 DOI: 10.2298/HEMIND180228012G

Branka Grujić, Z. Vuković, Jelena Veljković‐Giga, S. Ibrić, D. Dekanski

{"title":"An investigation into the effects of excipients on quality characteristics of a dry herbal extract containing capsule","authors":"Branka Grujić, Z. Vuković, Jelena Veljković‐Giga, S. Ibrić, D. Dekanski","doi":"10.2298/HEMIND180228012G","DOIUrl":"https://doi.org/10.2298/HEMIND180228012G","url":null,"abstract":"Nutrition and dietary supplements have a significant role in the prevention and treatment of cardiovascular disease. Olive and vine leaves, thanks to their constituents, represent powerful natural antioxidants exhibiting cardioprotective activity. High concentrations of active ingredients can be provided by means of extraction. Dry herbal extracts are highly sensitive to moisture and elevated temperature and from the pharmaceutical and technological point of view these are raw materials with inadequate technological properties. The aim of this study was to investigate and to compare the influence of different excipients in capsule formulation of these two dry extracts i.e. the selection of excipients that will ensure appropriate critical process parameters in the manufacturing procedure. The monitored quality characteristics include flowability, bulk density and tapped density that are critical for technological feasibility of the capsule-filling operation. The effects of excipients on the above parameters have been experimentally studied and the appropriate capsule formulations have been developed based on the obtained results, which will ensure homogeneity and stability of the preparation.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2018-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42774192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Електрохемијски суперкондензатори: Принцип рада, компоненте и активни материјали 电化学超级电容器：快乐原理、组件和活性材料

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-07-30 DOI: 10.2298/10.2298/HEMIND180515016D

Александар Б. Декански, Владимир В. Панић

引用次数: 1

Characterization of surface roughness of new nanophotonic soft contact lenses using lacunarity and AFM method 利用腔隙和原子力显微镜表征新型纳米光子软性隐形眼镜表面粗糙度

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-06-05 DOI: 10.2298/HEMIND170924004M

Aleksandra Mitrović, B. Bojovic, D. Stamenković, Dejana Popović

{"title":"Characterization of surface roughness of new nanophotonic soft contact lenses using lacunarity and AFM method","authors":"Aleksandra Mitrović, B. Bojovic, D. Stamenković, Dejana Popović","doi":"10.2298/HEMIND170924004M","DOIUrl":"https://doi.org/10.2298/HEMIND170924004M","url":null,"abstract":"The aim of this work was to develop new soft contact lens (SCL) materials which would, after recommended and existing machining processes, improve surface roughness. Nanomaterials were incorporated into commercial material for SCL (SL38) based on PHEMA, which were derived by the technology in the production lab of the company Soleko (Milan, Italy). Nanophotonic SCLs (SL38-A, SL38-B, SL38-C) were produced in the company Optix (Belgrade, Serbia) from the obtained materials. For the surface characterization of SCLs, AFM analysis and lacunarity method were performed. The results showed that SL38-B average roughness value is lower than SL38-A and SL38. The topography parameters of SL38-C were between the parameters of SL38-A and SL38-B. Lacunarity analysis of AFM images confirmed that SCLs surface state should belong to either group of adequate (slanted p -diagram) or inadequate (contorted p -diagram) roughness concerning tear film stability. Nanophotonic SCL SL38-C evince more acceptable performance consider SCL surface functional behavior compare other SCLs. The positive result of incorporating nanomaterials into basic material for SCL is better quality of the nanophotonic SCLs surfaces. On the bases of these experiments, the assumption that incorporation of fullerene derivate can play a role in the prevention of a significant increase in roughness is confirmed.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2018-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47090035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Characterization of a coating 316L applied by plasma transferred arc 等离子转移电弧316L涂层的表征

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-06-05 DOI: 10.2298/HEMIND170928005M

A. Maslarevic, M. Bakic, B. M. Djukic, B. Rajicic, Vesna Maksimovic

引用次数: 2

Effects of water boiling, microwave, and water bath post-polymerization on mechanical properties of acrylic denture resins 水煮、微波和水浴后聚合对丙烯酸义齿树脂力学性能的影响

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-06-05 DOI: 10.2298/HEMIND170924008K

M. Kostić, L. Nikolić, V. Nikolić, Dušan Petković, M. Igić, N. Krunić, M. Manić, N. Gligorijević, G. Radenković

{"title":"Effects of water boiling, microwave, and water bath post-polymerization on mechanical properties of acrylic denture resins","authors":"M. Kostić, L. Nikolić, V. Nikolić, Dušan Petković, M. Igić, N. Krunić, M. Manić, N. Gligorijević, G. Radenković","doi":"10.2298/HEMIND170924008K","DOIUrl":"https://doi.org/10.2298/HEMIND170924008K","url":null,"abstract":"Acrylic restorations in the mouth are exposed to strong occlusal forces. Their mechanical properties depend on the type and method of their polymerization. The aim of this study is a comparative analysis of mechanical properties (flexural strength and modulus of elasticity) of acrylic materials before and after the post-polymerization treatments (water boiling, microwave irradiation and water storage). The study included denture base resins, as well as an acrylate for orthodontic appliances impregnated with aesthetic beads. Flexural strength, modulus of elasticity and the deflection were measured immediately after polymerization, after a hot and microwave post-polymerization and after immersion in a water bath at the temperature of 37 °C. The applied post-polymerization methods resulted in an increase in flexural strength and modulus of elasticity relative to the initial values for all tested materials. Being aware of the reduction in fracture risk of dental prosthesis after a proposed post-polymerization procedure, it could be used in all clinical situations where there is an increased risk of damage to dentures.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2018-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41560037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Design of an H(lemniscate) PI controller with given relative stability and its application to the CSTR problem 具有给定相对稳定性的H（旅线）PI控制器的设计及其在CSTR问题中的应用

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-06-05 DOI: 10.2298/HEMIND170529007D

Ljubiša Dubonjić, V. Filipovic, N. Nedic, Vladimir Đorđević

引用次数: 0

Low moisture starch for improved viability and stability of new probiotic L. plantarum 299v preparation 低水分淀粉提高新型益生菌植物乳杆菌299v制剂的活力和稳定性

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2018-04-18 DOI: 10.2298/HEMIND170913003K

D. Korcok, Olivera Čolić, N. Milanović, Bogdan Mitic

引用次数: 1