{"title":"Application of Diamondoids as Maturity Indicators for Condensate from Drava Depression, Croatia","authors":"S. Marinović, Mirna Biondić","doi":"10.15255/kui.2022.030","DOIUrl":"https://doi.org/10.15255/kui.2022.030","url":null,"abstract":",","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44100172","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}
Databases are important because of the unified presentation of information according to a specific subject. Publicly available databases have additional value due to easier access to knowledge and information. The article describes the database of protein structures, Protein Data Bank – PDB, its establishment, humble beginnings
数据库很重要，因为它可以根据特定主题统一表示信息。由于更容易获得知识和信息，公开可用的数据库具有额外的价值。本文介绍了蛋白质结构数据库protein Data Bank - PDB的建立、起源
{"title":"50. godišnjica osnutka baze struktura bioloških makromolekula","authors":"Goran Šinko","doi":"10.15255/kui.2022.029","DOIUrl":"https://doi.org/10.15255/kui.2022.029","url":null,"abstract":"Databases are important because of the unified presentation of information according to a specific subject. Publicly available databases have additional value due to easier access to knowledge and information. The article describes the database of protein structures, Protein Data Bank – PDB, its establishment, humble beginnings","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46213808","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}
This work presents a brief review of mass crude steel production technology in the 1954–2020 pe - riod, with an accent on steel production in the Republic of Croatia in the 1992–2020 period. Steel producers in Croatia were Ironworks in Sisak and Split. Steel was produced using Siemens-Martin (Sisak) and electric arc furnaces (Sisak and Split). Today, steel is produced only by ABS Sisak Ltd., using contemporary electric arc furnaces including steelmaking processes (ladle-furnace and vac - uum degasser). Due to the devastation of the working capacities of Sisak Ironworks (before 2012), and shutdown of steel production at Split Ironworks, today Croatia has no possibility of process - ing its own steel by plastic deformation processes into semi-finished products and/or finished products. In Croatia, during the 1954–2020 period, about 9.3 Mt of crude steels were produced (carbon and low alloyed steels). Also shown is the role of higher education and scientific-research work in steelmaking in the Republic of Croatia.
{"title":"Značajke masovne proizvodnje sirovog čelika u Republici Hrvatskoj od 1954. do 2020. godine","authors":"M. Gojić, S. Kožuh, Ivana Ivanić, Milan Bakić","doi":"10.15255/kui.2022.031","DOIUrl":"https://doi.org/10.15255/kui.2022.031","url":null,"abstract":"This work presents a brief review of mass crude steel production technology in the 1954–2020 pe - riod, with an accent on steel production in the Republic of Croatia in the 1992–2020 period. Steel producers in Croatia were Ironworks in Sisak and Split. Steel was produced using Siemens-Martin (Sisak) and electric arc furnaces (Sisak and Split). Today, steel is produced only by ABS Sisak Ltd., using contemporary electric arc furnaces including steelmaking processes (ladle-furnace and vac - uum degasser). Due to the devastation of the working capacities of Sisak Ironworks (before 2012), and shutdown of steel production at Split Ironworks, today Croatia has no possibility of process - ing its own steel by plastic deformation processes into semi-finished products and/or finished products. In Croatia, during the 1954–2020 period, about 9.3 Mt of crude steels were produced (carbon and low alloyed steels). Also shown is the role of higher education and scientific-research work in steelmaking in the Republic of Croatia.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44633681","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}
Long-term irrigation by treated wastewater (TWW) can lead to the accumulation of heavy metals (HM) in the soil inducing negative effects on the pedo-environment. In this study, plots irrigated with TWW were studied to estimate the accumulation trends of HM and their impact on the physicochemical properties of the soil over a period of four years under a gravity irri- gation system on turf with no fertiliser input. Soil samples were taken at two depths (0 to 20 cm: H1 and 20 to 40 cm: H2). The results of this study show that TWW are a main source of increase in HM in the soil by well-identified conditions, the degradation of the environment in general and on the physicochemical quality of soils in particular. It was concluded that the use of TWW in long-term irrigation enriches the soils with heavy metals, by main factors such as TWW composition
{"title":"Accumulation of Heavy Metals in Soils Irrigated by Treated Wastewater: A Case Study from the Northwest of the Haut Chelif Plain, Algeria","authors":"Yacine Rata, A. Douaoui, A. Douaik, M. Rata","doi":"10.15255/kui.2022.040","DOIUrl":"https://doi.org/10.15255/kui.2022.040","url":null,"abstract":"Long-term irrigation by treated wastewater (TWW) can lead to the accumulation of heavy metals (HM) in the soil inducing negative effects on the pedo-environment. In this study, plots irrigated with TWW were studied to estimate the accumulation trends of HM and their impact on the physicochemical properties of the soil over a period of four years under a gravity irri- gation system on turf with no fertiliser input. Soil samples were taken at two depths (0 to 20 cm: H1 and 20 to 40 cm: H2). The results of this study show that TWW are a main source of increase in HM in the soil by well-identified conditions, the degradation of the environment in general and on the physicochemical quality of soils in particular. It was concluded that the use of TWW in long-term irrigation enriches the soils with heavy metals, by main factors such as TWW composition","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43757199","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}
Mirjana Galant, Dijana Grgas, Tea Štefanac, M. Habuda-Stanić, T. Landeka Dragičević
Nitrogen removal efficiency related to the dissolved oxygen (DO) concentration (DO 1–7 mg l −1 ), carbon/nitrogen ratio (COD/N 1–14), and the effect of airflow (0.4–2.9 l min −1 ) related to the granule size were investigated. The average chemical oxygen demand (COD) removal of ≥ 90 % was achieved at COD/N ≥ 11, but the satisfactory N values in effluent for discharge into the surface waters were almost achieved at COD/N 14. DO of 2 mg l −1 is recommended for efficient removal of N and COD with mature granules. The size (diameter) of the granules decreases with increased airflow
{"title":"Nitrogen Removal with Aerobic Granules – Effect of Dissolved Oxygen and Carbon/Nitrogen Ratio","authors":"Mirjana Galant, Dijana Grgas, Tea Štefanac, M. Habuda-Stanić, T. Landeka Dragičević","doi":"10.15255/kui.2022.034","DOIUrl":"https://doi.org/10.15255/kui.2022.034","url":null,"abstract":"Nitrogen removal efficiency related to the dissolved oxygen (DO) concentration (DO 1–7 mg l −1 ), carbon/nitrogen ratio (COD/N 1–14), and the effect of airflow (0.4–2.9 l min −1 ) related to the granule size were investigated. The average chemical oxygen demand (COD) removal of ≥ 90 % was achieved at COD/N ≥ 11, but the satisfactory N values in effluent for discharge into the surface waters were almost achieved at COD/N 14. DO of 2 mg l −1 is recommended for efficient removal of N and COD with mature granules. The size (diameter) of the granules decreases with increased airflow","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43968882","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}
Lucija Hok, Davorin Šakić, Valerije Vrček, Robert Vianello
Investigation of the stereoisomerisation process is of the utmost importance in pharmaceutical chemistry and biomedicine. Different isomers can exhibit significant differences when interacting with biological macromolecules, which may result in their modified pharmacokinetic and phar - macodynamic properties, thereby showing different therapeutic and undesirable effects. Although there are numerous examples illustrating the importance of stereochemistry, this article presents an overview of the most significant and representative cases in pharmacy.
{"title":"Farmaceutski značaj procesa stereoizomerizacije","authors":"Lucija Hok, Davorin Šakić, Valerije Vrček, Robert Vianello","doi":"10.15255/kui.2022.027","DOIUrl":"https://doi.org/10.15255/kui.2022.027","url":null,"abstract":"Investigation of the stereoisomerisation process is of the utmost importance in pharmaceutical chemistry and biomedicine. Different isomers can exhibit significant differences when interacting with biological macromolecules, which may result in their modified pharmacokinetic and phar - macodynamic properties, thereby showing different therapeutic and undesirable effects. Although there are numerous examples illustrating the importance of stereochemistry, this article presents an overview of the most significant and representative cases in pharmacy.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46608214","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}
Barbara Bilandžija, Lucija Bilandžija, Lea Pollak, Suzana Inić
, and essential oil content has already been used as a standard for determining the quality of officinal essential oils in European Pharmacopoeia. The introduction of standardised procedures for testing the quality and purity of immortelle essential oil, hydrolate, and macerate would help better analytical control of these preparations on the market.
{"title":"Metode dobivanja i parametri procjene kakvoće eteričnog ulja, hidrolata i macerata smilja","authors":"Barbara Bilandžija, Lucija Bilandžija, Lea Pollak, Suzana Inić","doi":"10.15255/kui.2022.025","DOIUrl":"https://doi.org/10.15255/kui.2022.025","url":null,"abstract":", and essential oil content has already been used as a standard for determining the quality of officinal essential oils in European Pharmacopoeia. The introduction of standardised procedures for testing the quality and purity of immortelle essential oil, hydrolate, and macerate would help better analytical control of these preparations on the market.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46507159","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}
Dino Skendrović, Lucija Terihaj, Tonči Rezić, Ana Vrsalović Presečki
.
．
{"title":"Biopolimeri hitin i hitozan – svojstva i priprava","authors":"Dino Skendrović, Lucija Terihaj, Tonči Rezić, Ana Vrsalović Presečki","doi":"10.15255/kui.2022.039","DOIUrl":"https://doi.org/10.15255/kui.2022.039","url":null,"abstract":".","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47230573","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}
CPEs for the quantitative determination of active pharmaceutical ingredients and their application in real samples.
活性药物成分的cpe定量测定方法及其在实际样品中的应用。
{"title":"Renesansa elektroda s ugljikovom pastom; njihove modifikacije i primjene u potenciometrijskim određivanjima farmaceutika","authors":"Josip Radić, Marija Bralić, Mitja Kolar","doi":"10.15255/kui.2022.038","DOIUrl":"https://doi.org/10.15255/kui.2022.038","url":null,"abstract":"CPEs for the quantitative determination of active pharmaceutical ingredients and their application in real samples.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45840570","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}
Ridha Lessoued, Ahmet Azizi, M. Lati, T. Ahmed Zaid
Electrocoagulation has lately received much interest as an effective method for the treatment of landfill leachate because of its ease of use, low cost, and environmental friendliness. The present study aimed to investigate the reduction of chemical organic demand (COD), biological organic demand (BOD 5 ), and turbidity from leachate by electrocoagulation process using alumin - ium electrodes. In order to achieve the maximum removal of pollutants, highlight the key effects of the variables and their simultaneous relationships, full central composite design was applied. Moreover, the backward model selection method using Bayesian Information Criterion and Akaike Information Criterion was carried out to determine the most suitable model with relevant effects. The optimum conditions indicated by the estimated quadratic models were initial pH (5.04), current density (407 A m −2 ), reaction time (74.6 min), and stirring speed (150 rpm), adjusted R 2 of 99.82 %, 99.93 %, and 99.95 % for COD, BOD 5 , and turbidity, respectively. Electrocoagulation was also successful in achieving 90 % COD, 92.3 % BOD 5 , and 99.6 % turbidity removal efficiency. The findings indicated a satisfactory agreement between model forecasts and experimental values.
电絮凝作为一种处理垃圾渗滤液的有效方法，因其易于使用、成本低、环境友好而受到广泛关注。本研究旨在探讨铝电极电絮凝工艺对渗滤液中化学有机需氧量(COD)、生物有机需氧量(bod5)和浊度的降低效果。为了最大限度地去除污染物，突出变量的关键影响及其同时存在的关系，采用了全中心复合设计。采用贝叶斯信息准则和赤池信息准则对模型进行逆向选择，以确定最适合的模型和相关效果。通过二次模型计算得到最佳条件为初始pH(5.04)、电流密度(407 A m−2)、反应时间(74.6 min)和搅拌速度(150 rpm)，调整后的r2对COD、BOD 5和浊度的影响分别为99.82%、99.93%和99.95%。电絮凝的COD去除率为90%，bod5去除率为92.3%，浊度去除率为99.6%。结果表明，模型预测值与实验值吻合较好。
{"title":"Modelling and Multi-response Optimisation of Leachate Treatment by Electrocoagulation using Full Central Composite Design","authors":"Ridha Lessoued, Ahmet Azizi, M. Lati, T. Ahmed Zaid","doi":"10.15255/kui.2021.085","DOIUrl":"https://doi.org/10.15255/kui.2021.085","url":null,"abstract":"Electrocoagulation has lately received much interest as an effective method for the treatment of landfill leachate because of its ease of use, low cost, and environmental friendliness. The present study aimed to investigate the reduction of chemical organic demand (COD), biological organic demand (BOD 5 ), and turbidity from leachate by electrocoagulation process using alumin - ium electrodes. In order to achieve the maximum removal of pollutants, highlight the key effects of the variables and their simultaneous relationships, full central composite design was applied. Moreover, the backward model selection method using Bayesian Information Criterion and Akaike Information Criterion was carried out to determine the most suitable model with relevant effects. The optimum conditions indicated by the estimated quadratic models were initial pH (5.04), current density (407 A m −2 ), reaction time (74.6 min), and stirring speed (150 rpm), adjusted R 2 of 99.82 %, 99.93 %, and 99.95 % for COD, BOD 5 , and turbidity, respectively. Electrocoagulation was also successful in achieving 90 % COD, 92.3 % BOD 5 , and 99.6 % turbidity removal efficiency. The findings indicated a satisfactory agreement between model forecasts and experimental values.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43196558","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：