Hemijska Industrija最新文献

{"title":"Some parameters of nutritional quality of meat obtained from Mangalitsa and Landrace pig breeds","authors":"J. R. Sevic, R. Lukáč, S. V. Vidivic, M. Puvača, M. Savic, B. Ljubojević, M. Tomović, R. N. Dzinic","doi":"10.2298/HEMIND140604071S","DOIUrl":"https://doi.org/10.2298/HEMIND140604071S","url":null,"abstract":"The aim of this study was to provide a comparative analysis of chemical and \u0000 fatty acid composition, as well as of the connective tissue proteins in pigs \u0000 of different genotypes, Mangalitsa and Landrace. Both pig genotypes were fed \u0000 with the same feed of standard composition and quality. At the end of the \u0000 fattening period, in total 24 pigs of both genotypes were slaughtered. Based \u0000 on the analysis of the chemical composition we came to the conclusion that \u0000 the protein content in both genotypes was similar. Moisture and ash content \u0000 in the Landrace pig genotype differed significantly (P<0.01) compared with \u0000 genotype of pigs Mangalitsa breed. Statistically significant differences \u0000 (P<0.01) were established in the fat content, which was 7.95 g/100g, in pigs \u0000 of Mangalitsa breed and 1.59 g/100g in the Landrace pigs breed. Content of \u0000 hydroxyproline, non-proteinogenic amino acids, in meat of Landrace was \u0000 significantly higher (P<0.01) compared to the content in the Mangalitsa \u0000 breed. The same tendency was observed with regard to the connective tissue \u0000 protein content as well as with the relative connective tissue protein \u0000 content. The fatty acid composition of the meat indicated that the most \u0000 common saturated fatty acid (SFA) in both tested breeds was palmitic fatty \u0000 acid (C16), whose content was significantly higher in Landrace (P<0.01) \u0000 compared with its content in Mangalitsa breed. In addition, the share of \u0000 stearic acid (C18) was significantly higher (P<0.01) in Landrace compared to \u0000 Mangalitsa pig breed, what significantly contributed to the increase of the \u0000 SFA share in Landrace compared to Mangalitsa breed. The most common \u0000 monounsaturated fatty acid in both pig breeds was the oleic fatty acid \u0000 (C18:1), whose share was significantly higher in Mangalitsa compared to the \u0000 Landrace breed (P<0.01). Out of the polyunsaturated fatty acids (PUFA), \u0000 linoleic fatty acid (C18:2) was the most predominant in both pig breeds, with \u0000 no statistically significant differences (P>0.05). The content of PUFA was \u0000 not statistically significantly different between the tested breeds, as well \u0000 as the content of n-3 and n-6 fatty acids, which caused no statistically \u0000 significant differences in the n-6/n-3 PUFA ratio. Ratio of the unsaturated \u0000 fatty acids, i.e., of the sum of MUFA and PUFA, and of the saturated fatty \u0000 acids was significantly higher in Mangalitsa compared to Landrace breed (1.86 \u0000 versus 1.4), and the same was observed when it comes to the relationship \u0000 MUFA/SFA (1.51 in Mangalitsa versus 1.08 in Landrace breed) and MUFA/PUFA \u0000 (4.35 versus 3.38).","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"71 1","pages":"111-118"},"PeriodicalIF":0.9,"publicationDate":"2017-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68374673","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}

{"title":"Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution","authors":"D. Sokić, N. Stojanovic, R. B. Markovic, Mladen Bugarčić, D. Strbac, J. Kamberović, D. Manojlović","doi":"10.2298/HEMIND161130006S","DOIUrl":"https://doi.org/10.2298/HEMIND161130006S","url":null,"abstract":"U radu su prikazani rezultati ispitivanja uticaja strukturno-teksturnih karakteristika sulfid­nih minerala na njihovo luženje iz polimetalicnog koncentrata rastvorom sumporne kise­line i natrijum-nitrata. Za određivanja karakteristika sulfidnih minerala u polaznom koncen­tratu i cvrstom ostatku luženja koriscena je hemijska, rendgenska difrakciona analiza na polikristalnom uzorku (XRD), kvalitativna i kvantitativna mikroskopska i SEM/EDX analiza. U polimetalicnom koncentratu je utvrđeno prisustvo halkopirita, sfalerita, galenita, pirotina i minerala jalovine. Tokom luženja Pb–Zn–Cu sulfidnog koncentrata rastvorom natrijum-nitrata i sumporne kiseline, deo sulfidnih minerala ostaje neizlužen i zaostaje u cvrstim ostacima luženja. Olovo, u obliku slaborastvornog olovo-sulfata (anglezita), ostaje u neizlu­ženom ostatku. Sadržaj sulfidnih minerala u neizluženom ostatku iznosi 35%, u kojem se 54,7% halkopirita, 31,9% sfalerita, 8,2% galenita i 37,6% pirotina javlja u vidu slobodnih mineralnih zrna sa intenzivnom korozijom njihovih ivica i pojavom elementarnog sumpora duž njihovih oboda. Strukturni sklop sulfidnih mineralnih zrna u polimetalicnom koncen­tratu je povolјan i nije razlog prisustva neizluženih sulfidnih minerala u cvrstim ostacima luženja. Razlog za to je elementarni sumpor koji nastaje u procesu luženja, taloži se na povrsini sulfidnih mineralnih zrna i otežava kontakt sulfidnih minerala i sredstva za luženje","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"71 1","pages":"461-469"},"PeriodicalIF":0.9,"publicationDate":"2017-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42411457","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}

{"title":"Influence of hydrodistillation rate and hydromodule on chemical composition of Juniperus communis L. essential oil","authors":"V. Pavićević, Marko N. Radović, Svetomir Ž. Milojević, Miljana S. Marković, M. Ristić, D. Povrenović","doi":"10.2298/HEMIND151119011P","DOIUrl":"https://doi.org/10.2298/HEMIND151119011P","url":null,"abstract":"U radu su prikazane promene hemijskog sastava etarskog ulja dobijenog hidrodestilacijom ploda kleke u zavisnosti od brzine destilacije i odnosa mase kleka − voda ( hidromodula ). Odabrane su 23 komponente (od ukupno 58 određenih) sa masenim udelom vecim od 0,5%. Najzastupljeniji su bili monoterpeni, zatim seskviterpeni i mnogo manje oksigenovani ugljovodonici. Prema isparljivosti, najvise je bilo lakoisparljivih, zatim teskoisparljivih i naj­manje srednjeisparljivih komponenata. Sa povecanjem brzine destilacije, maseni udeo lakoisparljivih i srednjeisparljivih komponenti se smanjuje, dok se maseni udeo tesko­ispa­r­ljivih komponenti povecava. Promene hidromodula su znatno manje uticale na maseni sastav nego promene brzine destilacije. Eksperimente hidrodestilacije treba nastaviti pri razlicitim brzinama destilacije, ukljucujuci istovremenu rektifikaciju, uticaj pripreme kleke i određivanje optimalne potrosnje energije.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"71 1","pages":"1-10"},"PeriodicalIF":0.9,"publicationDate":"2017-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46536069","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}

{"title":"A stepwise protocol for drug permeation assessment that combines heat-separated porcine ear epidermis and vertical diffusion cells","authors":"I. Pantelić, T. Ilić, B. Marković, Sanela M. Savic, M. Lukić, S. Savić","doi":"10.2298/HEMIND170726019P","DOIUrl":"https://doi.org/10.2298/HEMIND170726019P","url":null,"abstract":"After decades long absence of an official consensus on the most appropriate evaluation method for in vitro skin performance of topical semisolid drugs, United States Pharmacopoeia (USP 39) finally suggested three types of testing equipment; however, all these provide data on drug release using inert synthetic membranes. Considering the need for a readily available membrane that would be more structurally similar to human skin, this paper provides a detailed protocol of a method for drug permeation assessment that uses heat-separated porcine ear epidermis and modified Franz diffusion cells. Phases that were shown to be critical for variability of the results are identified ( e.g. membrane preparation), and process parameters optimized. Applicability of the method was tested on four cream samples loaded with aceclofenac as a model drug. Sample compositions were designed in such a way to provide „large“ variations (variation of the main stabilizer: natural-origin versus synthetic emulsifier) and relatively „minor“ variations (co-solvent variation: none/isopropanol/glycerol). The developed protocol is a straightforward and reliable in vitro test for the evaluation of rate and extent of drug delivery into/through the skin. Moreover, this protocol may be routinely applied even in averagely equipped laboratories during formulation development or preliminary bioequivalence assessment of generic topical semisolids.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"72 1","pages":"47-53"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68380617","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}

{"title":"Polyaniline stabilization of magnetic particles and immobilization of alpha-amylase","authors":"N. Radovanovic, P. Nikolić, M. Djurovic, Z. Jugovic, M. Gvozdenović, N. B. Grgur, D. Z. Knezevic-Jugovic","doi":"10.2298/hemind161213016r","DOIUrl":"https://doi.org/10.2298/hemind161213016r","url":null,"abstract":"","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"72 1","pages":"16-16"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68380293","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}

{"title":"The use of salicylaldehyde derivatives as a nitrogen source for antibiotic production by Streptomyces hygroscopicus CH-7","authors":"S. Konstantinović, Z. M. Zlatkovic, T. J. Ciric, B. Ilić, D. G. Gojgic-Cvijovic, B. Veljkovic","doi":"10.2298/HEMIND170124011K","DOIUrl":"https://doi.org/10.2298/HEMIND170124011K","url":null,"abstract":"In the present work, four derivatives of salicylaldehyde (salicylaldehyde-hydrazone, phenylhydrazone, semicarbazone and thiosemicarbazone) were synthesized using both conventional (95% ethanol) and green (crude glycerol from biodiesel production) solvents. The obtained compounds were identified by elemental microanalysis, as well as FTIR, UV/VIS, 1H NMR and X-ray spectroscopic methods. Yields of 93-98% of the compounds in crude glycerol were achieved within 10-25 min. The derivatives of salicylaldehyde and crude glycerol were used as a nitrogen and carbon source, respectively, in the medium for antibiotic (Hexaene H-85 and Azalomycine B) production by Streptomyces hygroscopicus CH-7. The highest concentrations of Hexaene H-85 and Azalomycine B were achieved in the medium containing salicylaldehyde-thiosemicarbazone (198 g/cm3 and 69 µg/cm3, respectively). Derivatives of salicylaldehyde also impacted the strain morphology. In the media with salicylaldehyde-phenylhydrazone and salicylaldehyde-thiosemicarbazone, S. hygroscopicus CH-7 grew like large dispersive pellets with long twisted filaments that produced the highest yield of the antibiotics.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"122 1","pages":"487-494"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68380174","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}

{"title":"Enhanced fertilization effect of a compost obtained from mixed herbs waste inoculated with novel strains of mesophilic bacteria","authors":"Snežana Dimitrijević, D. Radanović, S. Antić-Mladenović, Milica Milutinović, M. Rajilić-Stojanović, S. Dimitrijević-Branković","doi":"10.2298/HEMIND170327013D","DOIUrl":"https://doi.org/10.2298/HEMIND170327013D","url":null,"abstract":"Mixed medicinal plant waste was composted with addition of novel bacterial strains belonging to the genera Streptomyces, Paenybacillus, Bacillus and Hymenobacter . The composting was followed by assessment of chemical and biological parameters including C/N ratio, loss of organic matter, phosphorous and potassium content as well as CO 2 generation and dehydrogenase activity during 164 days. The selected mesophilic bacterial starters had a potential to significantly reduce the period of mixed herb waste decomposition, from about 6 months to about 2.5 months. Based on the seed germination index of four plants ( Fagopirum esculentum, Thymus vulgaris, Cynara scolimus and Lavandula officinalis ) the germination and radial root growth of the investigated plants was improved by the inoculated compost. The germination index of all tested species on the mature inoculated composts was in average 60% higher compared to the control compost. The research indicates that the mesophilic starter addition into the herbs waste can contribute to the speed of waste decomposition and lead to the improvement of biofertilization effect of the obtained compost.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"71 1","pages":"503-513"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68380301","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}

{"title":"Fractionation of the essential oil from juniper (Juniperus ommunis L.) berries by hydrodistillation and rectification","authors":"Miljana S. Marković, N. Boskovic-Vragolovic, M. Ristić, V. Pavićević, V. Veljković, Svetomir Ž. Milojević","doi":"10.2298/HEMIND161204009M","DOIUrl":"https://doi.org/10.2298/HEMIND161204009M","url":null,"abstract":"This paper deals with fractionation of the essential oil from juniper (Juniperus communis L.) berries by hydrodistillation (HD) and simultaneous hydrodistillation and rectification (SHDR) at atmospheric pressure. A rectification column was filled with the NORMAG packing A type and had 36 theoretical stages. In the present study, higher essential oil yield was obtained by HD (1.34 mass %) than by SHDR (1.17 mass %). However, mass fraction distributions of monoterpene hydrocarbons (MHs), oxygenated monoterpenes (OMs) and sesquiterpene hydrocarbons (SHs), observed for the two separation methods, differed from each other. In the SHDR process increased contents of high volatile components (predominantly MHs) were obtained in the initial fractions as well as increased contents of low volatile components (dominantly SHs) in the last fractions. Also, this method increased the separation degree of OMs.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"71 1","pages":"471-477"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68379700","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}

{"title":"Characterization of the zeolitic tuff from the “Igros-Vidojevici” deposit regarding geological and technological aspects","authors":"Vladan Kašić, Slavica Mihajlović, D. Životić, V. Šimić, J. Stojanovic, Ž. Sekulić, M. Kragović","doi":"10.2298/HEMIND170428015K","DOIUrl":"https://doi.org/10.2298/HEMIND170428015K","url":null,"abstract":"U radu su prikazani rezultati ispitivanja zeolitskog tufa iz ležista „Igros-Vidojevici“ u cilju sagledavanja mineragenetske karakteristike ležista, utvrđivanja kvaliteta zeolita, primene i nacina valorizacije. Iz tih razloga je uzet uzorak iz podine ležista „Zeolit 1“ i uzorci sredisnjeg dela ležista „Zeolit 2“, „Zeolit 3“, „Zeolit 4“ i „Zeolit 5“. U karakterizaciji uzoraka primenjene su sledece metode: elementna hemijska analiza, kvantitativna SEM/EDS analiza, određivanje koeficijenta adsorpcije metilen plavog i kapaciteta katjonske izmene (KKI), rendgenska difrakcija praha (RDP), termijska analiza (TG, DTA) i i nfracrvena spektroskopija sa Furijeovom transformacijom (FTIR). Rezultati rendgenske i termijske analize su pokazali da podinu ležista u najvecoj meri cini glina, dok je u ostataku ležista zeolit. Sa mineragenetskog aspekta zapaža se da se radi o zeolitu-klinoptilolitu koje je najvece u uzorcima „Zeolit 2“ i „Zeolit 3“, pa su oni i najkvalitetniji. Na to ukazuju i vrednosti njihovog KKI i to 141,99 mmol/100g odnosno 121,01 mmol/100g. Uzorci „Zeolit 4“ i „Zeolit 5“ imaju nesto manji KKI (89,48 mmol/100g i 83,75 mmol/100g), losijeg su kvaliteta. Rezultati rendgenske i termijske analize su pokazali da podinu ležista u najvecoj meri cini glina, dok je u ostataku ležista zeolit. Sa mineragenijskog aspekta se može reci da je prisustvo zeolitskih minerala hojlanditskog tipa najvece u uzorcima „Zeolit 2“ i „Zeolit 3“, pa su oni i najkvalitetniji. Na to ukazuju i visoke vrednosti njihovog KKI i to 141,99 meq/100g odnosno 121,01 meq/100g. Zbog toga bi ovi uzorci mogli imati prakticnu primenu kao adsorbenti neorganskih zagađivaca iz kontaminiranih voda, a zbog visokog sadržaja osnovnog zeolitskog minerala potencijalno se mogu koristiti i kao sredstvo za uklanjanje mikotoksina iz stocne hrane. Uzorci „Zeolit 4“ i „Zeolit 5“ imaju nesto niži KKI (89,48 meq/100g i 83,75 meq/100g), slabijeg su kvaliteta, pa se potencijalno mogu upotrebiti za poboljsanje kvaliteta zemljista.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"72 1","pages":"29-37"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68380202","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}

{"title":"Seam pipes for process industry - fracture analysis by using ring-shaped specimens","authors":"W. Musraty, B. Medjo, N. Gubeljak, Primož Štefane, Z. Radosavljevic, Z. Burzić, M. Rakin","doi":"10.2298/HEMIND170530014M","DOIUrl":"https://doi.org/10.2298/HEMIND170530014M","url":null,"abstract":"Pipelines are commonly used in process industry for transport of fluids, as well as granular solids, due to their numerous advantages in comparison to other transportation means. Pipe integrity is essential for a reliable work of the entire plant, as well as for safety assurance. Also, serious ecological consequences may follow the pipeline failure in some cases, i.e. due to the leak of toxic, flammable or otherwise dangerous fluids in a chemical or some other plant. Therefore, it is very important to examine the fracture behaviour of pipelines, which is done here by testing the recently proposed ring-shaped specimens exposed to bending. The specimens were fabricated from a seam pipe for pressure applications (allowed for usage on temperatures up to 300 °C). Initial defects, very narrow notches, were machined either in the base metal and weld metal (seam) or in the base metal only. Regardless of the defect position, ductile fracture mechanism is observed in all specimens. The results show that the ring-shaped specimen can be successfully used for fracture characterisation of pipeline material, especially for thin-walled pipes which are not suitable for production of standard fracture mechanics specimens due to the insufficient wall thickness.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":"72 1","pages":"39-46"},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68381004","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}