Hemijska Industrija最新文献_第10页

Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution 结构和质地颗粒特征对硝酸钠和硫酸溶液浸出多金属精矿中硫化物矿物的影响

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-05-06 DOI: 10.2298/HEMIND161130006S

D. Sokić, N. Stojanovic, R. B. Markovic, Mladen Bugarčić, D. Strbac, J. Kamberović, D. Manojlović

{"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":null,"pages":null},"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}

引用次数: 2

Influence of hydrodistillation rate and hydromodule on chemical composition of Juniperus communis L. essential oil 加氢蒸馏速率和加氢模对杜松精油化学成分的影响

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-02-28 DOI: 10.2298/HEMIND151119011P

V. Pavićević, Marko N. Radović, Svetomir Ž. Milojević, Miljana S. Marković, M. Ristić, D. Povrenović

引用次数: 5

A stepwise protocol for drug permeation assessment that combines heat-separated porcine ear epidermis and vertical diffusion cells 结合热分离猪耳表皮和垂直扩散细胞的药物渗透评估的逐步方案

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND170726019P

I. Pantelić, T. Ilić, B. Marković, Sanela M. Savic, M. Lukić, S. Savić

{"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":null,"pages":null},"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}

引用次数: 7

The use of salicylaldehyde derivatives as a nitrogen source for antibiotic production by Streptomyces hygroscopicus CH-7 吸湿链霉菌CH-7利用水杨醛衍生物作为氮源生产抗生素

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND170124011K

S. Konstantinović, Z. M. Zlatkovic, T. J. Ciric, B. Ilić, D. G. Gojgic-Cvijovic, B. Veljkovic

{"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":null,"pages":null},"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}

引用次数: 1

Polyaniline stabilization of magnetic particles and immobilization of alpha-amylase 磁性颗粒的聚苯胺稳定及α -淀粉酶的固定化

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/hemind161213016r

N. Radovanovic, P. Nikolić, M. Djurovic, Z. Jugovic, M. Gvozdenović, N. B. Grgur, D. Z. Knezevic-Jugovic

引用次数: 0

Enhanced fertilization effect of a compost obtained from mixed herbs waste inoculated with novel strains of mesophilic bacteria 用新型中温细菌菌株接种混合草本废弃物堆肥提高施肥效果

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND170327013D

Snežana Dimitrijević, D. Radanović, S. Antić-Mladenović, Milica Milutinović, M. Rajilić-Stojanović, S. Dimitrijević-Branković

{"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":null,"pages":null},"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}

引用次数: 5

Fractionation of the essential oil from juniper (Juniperus ommunis L.) berries by hydrodistillation and rectification 用加氢蒸馏和精馏的方法从杜松(Juniperus communis L.)浆果中分离精油

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND161204009M

Miljana S. Marković, N. Boskovic-Vragolovic, M. Ristić, V. Pavićević, V. Veljković, Svetomir Ž. Milojević

引用次数: 6

Seam pipes for process industry - fracture analysis by using ring-shaped specimens 加工工业用缝管。环形试样断裂分析

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND170530014M

W. Musraty, B. Medjo, N. Gubeljak, Primož Štefane, Z. Radosavljevic, Z. Burzić, M. Rakin

{"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":null,"pages":null},"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}

引用次数: 5

Characterization of the zeolitic tuff from the “Igros-Vidojevici” deposit regarding geological and technological aspects “Igros-Vidojevici”矿床沸石凝灰岩的地质技术特征

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND170428015K

Vladan Kašić, Slavica Mihajlović, D. Životić, V. Šimić, J. Stojanovic, Ž. Sekulić, M. Kragović

{"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":null,"pages":null},"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}

引用次数: 2

Direct ultrasound-assisted extraction and characterization of phenolic compounds from fresh houseleek (Sempervivum marmoreum L.) leaves 直接超声辅助提取新鲜冬瓜叶中酚类化合物及其表征

IF 0.9 4区工程技术

Hemijska Industrija Pub Date : 2017-01-01 DOI: 10.2298/HEMIND170402017K

Ivana T. Karabegović, S. Stojičević, D. Veličković, N. Nikolić, M. Lazić

{"title":"Direct ultrasound-assisted extraction and characterization of phenolic compounds from fresh houseleek (Sempervivum marmoreum L.) leaves","authors":"Ivana T. Karabegović, S. Stojičević, D. Veličković, N. Nikolić, M. Lazić","doi":"10.2298/HEMIND170402017K","DOIUrl":"https://doi.org/10.2298/HEMIND170402017K","url":null,"abstract":"The effects of ultrasound power and frequency on the yield of total extractive substances (TES), total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activity (AOA) of fresh houseleek leaves extracts obtained by direct ultrasound-assisted extraction (DUAE) were studied. Preliminary extraction of plant material was performed using methanol, acetone and 2-propanol by Soxhlet extraction. It was found that maximum TES yield could be obtained by methanol extraction (2.91±0.02), followed by acetone and 2-propanol with a TES yield of 2.32±0.01 and 2.01±0.03 g per 100 g of fresh plant material, respectively. In the fresh houseleek leaves extracts obtained by DUAE and methanol as the chosen solvent, TPC, TFC and AOA were in the ranges of: 40.5-85.9 mg gallic acid/g dry extract, 12.7-19.3 mg rutin/g dry extract and 24.6-108.2µg/ml, respectively. The results showed that the increase in the ultrasound power and extraction time have positive and significant (p<0.05) effects on the TPC, TFC and AOA, while the increase in the ultrasound frequency leads to a decrease in the TPC, TFC and AOA of the extracts. A chromatographic analysis of crude extract identified the following: Kaempferol 3-O-(6’’-O-malonylglucoside)-7-O-glucosyde, Kaempferol 3-O glucoside-7-O-rhamnoside, Luteolin 5-O-(6’’-O-malonylglucoside), Kaempferol 3-O-(6’’-O-acetylglucoside)-7-O-rhamnoside, Genkwanin 5-O-glucoside, Luteolin 5-O-(6’’-O-malonylglucoside), Kaempferol 3-O-(6’’-O-malonylglucoside), Kaempferol 3-O-rhamnoside, Quercetin, Genkwanin 4’-O-glucoside and Hyperoside.","PeriodicalId":12913,"journal":{"name":"Hemijska Industrija","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68380356","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: 4