Kemija u Industriji-Journal of Chemists and Chemical Engineers最新文献_第4页

Koja je cijena pušenja? – Opasnosti za okoliš 吸烟要多少钱？环境危害

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.041

Anka Ćurić, Katarina Muzica, Ivana Runjak, Daniela Vasiljević, Martina Miloloža, Dajana Kučić Grgić

引用次数: 0

Valorizacija nusproizvoda proizvodnje vina

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.051

Živko Skračić, I. Ljubenkov, N. Mimica, Ivana Generalić Mekinić

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Multicomponent Adsorption Capacity Forecasting Based on Support Vector Machine with Dragonfly Algorithm 基于蜻蜓算法的支持向量机多组分吸附容量预测

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.048

Riadh Moumen, M. Laidi, S. Hanini, Mohamed Hentabli, A. Ibrir

{"title":"Multicomponent Adsorption Capacity Forecasting Based on Support Vector Machine with Dragonfly Algorithm","authors":"Riadh Moumen, M. Laidi, S. Hanini, Mohamed Hentabli, A. Ibrir","doi":"10.15255/kui.2022.048","DOIUrl":"https://doi.org/10.15255/kui.2022.048","url":null,"abstract":"The predictability of the adsorption capacity of the multicomponent adsorption system was modelled using Support Vector Machine (SVM). Two SVM models were built and compared. In the first model, the SVM method was used with an already built-in optimisation algorithm. However, in the second model, the SVM method was used by means of a very recent and efficient optimisation algorithm: the Dragonfly Algorithm (DA). The models’ accuracy was evaluated by three well-established statistical metrics (root mean squared error RMSE, determina- tion coefficient R 2 , and correlation coefficient R ). The used data were collected from previous experimental papers published in literature containing all kinds of pollutants, such as heavy metal ions, dyes, and organic compounds, and different natural/ synthetic adsorbents. The dataset contained five important variables with 1023 points; the variables were divided into four in - puts (molecular weight, equilibrium concentrations of adsorbate, specific area of adsorbent, and temperature), and one output (adsorption capacity at equilibrium). The data were divided using the holdout function into two subsets (80 % for training set, and 20 % for test set). The programming stage was carried out using MATLAB software. The results showed that the optimised DA-SVM model with RBF-Gaussian kernel function had good ability for global search combined with high prediction accuracy, with R 2 = 0.997, R = 0.998, and RMSE = 2.539. The obtained model can be used to predict the efficiency of the adsorption system, and provides a tool for process optimisa - tion responding to changes in operating conditions. A new graphical user interface (GUI) was developed with MATLAB GUI to estimate accurately the desired responses by using the best DA-SVM model.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44133471","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}

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Antioxidant and Biological Activities of Fresh and Dried Apricot Extracts Obtained by Cold Soaking and Ultrasonic Extraction 冷浸和超声波提取鲜杏干提取物的抗氧化和生物活性

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.054

Abla Bousselma, Hichem Tahraoui, D. Abdessemed, A. Amrane, M. Kebir, N. Moula, Mouni Saadoudi, Asma Temagoult

引用次数: 0

Photoelectrocatalytic Hydrogen Production Supported by Ascorbic Acid 抗坏血酸支持的光电催化制氢

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.050

Dajana Balaić, Gabriela Antonije Oreški, Gabrijela Radić, H. Kušić, Klara Perović, M. Kraljić Roković

{"title":"Photoelectrocatalytic Hydrogen Production Supported by Ascorbic Acid","authors":"Dajana Balaić, Gabriela Antonije Oreški, Gabrijela Radić, H. Kušić, Klara Perović, M. Kraljić Roković","doi":"10.15255/kui.2022.050","DOIUrl":"https://doi.org/10.15255/kui.2022.050","url":null,"abstract":"Photoelectrochemical hydrogen production combines electrochemistry and photocatalysis, resulting in sustainable hydrogen production. The process can be improved by the addition of hole scavengers, which reduce the recombination of electrons and holes, increasing the utilisation of solar radiation. Because of its low oxidation potential, ascorbic acid (AA) is an environmentally friendly and readily available hole scavenger. The commonly studied photocatalyst TiO 2 makes little utilisation of solar radiation energy due to its high energy gap of 3.2 eV. The metal sulphide SnS 2 attracts attention due to its low energy band gap of 2.2 eV, which allows the use of the visible region of the spectrum. In this work, the electrochemical characterisation of SnS 2 and TiO 2 photoanodes in NaCl solution in the presence and absence of AA was performed. The effect of AA on the photore-sponse was investigated using the linear polarisation method and monitoring the open circuit potential. The results confirmed that SnS 2 and TiO 2 electrodes are photoactive, and that AA has good hole scavenging properties. Hydrogen production was performed at constant potentials of 0.6 and 1.35 V, respectively. TiO 2 exhibited higher photoactivity, thus producing more hydrogen at 0.6 V. On the other hand, at a potential of 1.35 V, most of the hydrogen produced was the result of an electro-chemical reaction rather than a photoelectrochemical reaction, thus, a larger amount of hydrogen was produced with the SnS 2 electrode. The highest amount of hydrogen produced in this work was at 1.35 V for the SnS 2 electrode in an argon atmosphere and it was 0.799 ml h −1 cm −2 .","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45307537","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

Polyphenols and Flavonoids Contents of Fresh and Dried Apricots Extracted by Cold Soaking and Ultrasound-assisted Extraction 冷浸和超声辅助提取鲜杏干中多酚和黄酮类化合物的含量

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.045

Abla Bousselma, D. Abdessemed, Hichem Tahraoui, Fouad Zedame, A. Amrane

引用次数: 1

Zeleni biokompoziti na bazi otpada taloga kave 废弃咖啡上的绿色生物复合材料

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.079

Ema Čemerika, Dora Milički, M. Miloloža, Dajana Kučić Grgić, Krunoslav Žižek, Vesna Ocelić Bulatović

{"title":"Zeleni biokompoziti na bazi otpada taloga kave","authors":"Ema Čemerika, Dora Milički, M. Miloloža, Dajana Kučić Grgić, Krunoslav Žižek, Vesna Ocelić Bulatović","doi":"10.15255/kui.2022.079","DOIUrl":"https://doi.org/10.15255/kui.2022.079","url":null,"abstract":"The continuous growth of the coffee market generates enormous amounts of spent coffee grounds (SCG), which account for up to 95 % of waste after coffee consumption. SCG contain a wealth of different resources that just need to be converted into another usable form. On the other hand, to - day’s excessive production of plastic waste in almost all industries worldwide is causing significant environmental pollution, leading to increased use of biodegradable polymers and biocomposites. Precisely because of the enormous amounts of SCG and the slow biodegradability of polylac - tide (PLA), this study aimed to investigate the properties and biodegradability of biocomposites made from green PLA and SCG, which were prepared by mixing the PLA matrix with different proportions of SCG. The thermal properties of the biocomposite were investigated by differential scanning calorimetry and thermogravimetric analysis. The particle size distribution of the SCG was studied by laser diffraction method, as well as the water absorption. The biodegradation of the biocomposite was carried out by a composting process of 19 days. The results of the thermal properties test showed that the SCG as filler did not affect the phase transitions of the PLA matrix, but it did affect the reduction of the thermal stability of the PLA_SCG biocomposite. The results of the water absorption test showed that increasing the amount of SCG leads to an increase in water absorption in biocomposites, due to the hydrophilic nature of the filler. On the light micro - scopic images, the surface attack of microorganisms was visible in biocomposites with lower SCG content, while deeper penetration was observed in biocomposites with higher SCG filler content.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46351530","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

SPF – super problematična formula? Aktivni sastojci krema za sunčanje u vodenom okolišu

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.053

Ivan Blažević, Krešimir Kos, M. Kovačević, Tibor Marković, Lucia Sović, Martina Miloloža

{"title":"SPF – super problematična formula? Aktivni sastojci krema za sunčanje u vodenom okolišu","authors":"Ivan Blažević, Krešimir Kos, M. Kovačević, Tibor Marković, Lucia Sović, Martina Miloloža","doi":"10.15255/kui.2022.053","DOIUrl":"https://doi.org/10.15255/kui.2022.053","url":null,"abstract":"Increased awareness of the negative effects of sun radiation exposure has resulted in the increased production and use of sunscreens. This in turn has resulted in the accumulation of UV filters, sunscreen active ingredients, in the aquatic environment. Studies have shown that UV filters, espe - cially those organic, such as oxybenzone, octinoxate, and 4-MBC, pose a danger to a wide range of organisms. Research findings discussed in this paper refer to the toxic effect of the stated chem - icals on marine and freshwater organisms, and they indicate that the presence of these chemicals in the aquatic environment has resulted in inhibition of growth and photosynthesis, reproductive and developmental disorders, organism bleaching, and even death of test organisms. Inorganic UV filters, which are mostly nanoparticle forms of TiO 2 and ZnO, show lower toxicity or have hardly any effect on test organisms in the conducted ecotoxicological tests. However, in studies in which they have shown low toxicity, this toxicity is not only caused by the presence of nanoparticles, but also by the formation of reactive oxygen species, which in some organisms has caused growth inhibition, bleaching, abnormal embryogenesis, and oxidative stress. Further research is necessary to understand better the toxic effects of these compounds, and to assess more accurately the risks they pose to the aquatic environment as well as the entire ecosystem.","PeriodicalId":43849,"journal":{"name":"Kemija u Industriji-Journal of Chemists and Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43740985","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

Physical and Chemical Properties of Selected Sample of Castor Oil, Ricinus communis L. 蓖麻油的理化性质研究。

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.052

Š. Mandal

引用次数: 1

Ekotoksičnost nesteroidnih protuupalnih lijekova na vodene organizme

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Kemija u Industriji-Journal of Chemists and Chemical Engineers Pub Date : 2023-03-18 DOI: 10.15255/kui.2022.042

Danijela Bićanić, Antonela Čugalj, Marko Jajčević, Antonija Lazinica, Martina Miloloža, Dajana Kučić Grgić

引用次数: 0