Kemija u industriji最新文献

Istraživanje, razvoj i inovacije u Hrvatskoj (prvi dio) – Nacionalni inovacijski sustav i strateški dokumenti do 2020. 克罗地亚的创新、发展和革新（第一部分）--2020 年前的国家创新战略和战略文件。

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.043

Zrinka Banić Tomišić, Ivana Crnić Duplančić

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Primjena mikroorganizama u procesima uklanjanja dušikovih spojeva iz otpadnih voda 微生物在去除废水中氮化合物过程中的作用

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.050

Maja Mitrović, Tonči Rezić

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Utjecaj antioksidansa na kvalitetu i oksidacijsku stabilnost palmina ulja 抗氧化剂对棕榈油质量和氧化稳定性的影响

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.046

Leila Raščić, Selma Čorbo, Amir Čaušević, Munevera Begić

{"title":"Utjecaj antioksidansa na kvalitetu i oksidacijsku stabilnost palmina ulja","authors":"Leila Raščić, Selma Čorbo, Amir Čaušević, Munevera Begić","doi":"10.15255/kui.2023.046","DOIUrl":"https://doi.org/10.15255/kui.2023.046","url":null,"abstract":"back several thousand years. At a temperature of 18–20 °C, the oil is in a solid state, which is why it is also referred to as fat. Palm oil has specific chemical composition and physical properties. Processing oil palm fruits yields high-quality oil used in various industries, with the largest application being in the food industry. However, the quality of palm oil is influenced by the method of production, storage, and storage conditions. Storing oils at high temperatures, and exposure to light and oxygen, leads to undesirable changes that impair the quality of the oil or the product containing it. To enhance the oxidative stability of palm oil, specific concentrations of antioxidants, either natural or synthetic, are added. For this research, extracts of rosemary, smoketree, ginger, immortelle, milk thistle, sage, and other medicinal plants were used as natural antioxidants in concentrations of 0.20 %, while butylhydroxyanisole, butylhydroxytoluene, and propyl gallate in concentrations of 0.01 % were used as synthetic antioxidants. Firstly, analyses of moisture content, free fatty acids, and peroxide value were performed on a control sample (without antioxidants). After adding antioxidants to the palm oil, a stability test was conducted in an oven at 63 °C. Samples were taken, and the peroxide value and free fatty acid content were determined every 24 h, up to a maximum of 120 h. The research found that, among the synthetic antioxidants, butylhydroxytoluene provided the greatest contribution to the stability of palm oil, while the other synthetic antioxidants had a similar effect. Among the natural antioxidants, the immortelle extract demonstrated the best effect, while the sage and milk thistle extracts accelerated the oxidative deterioration of palm oil.","PeriodicalId":511785,"journal":{"name":"Kemija u industriji","volume":"87 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141652911","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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Voltammetric Detection of Diclofenac with Screen-printed Electrodes Based on Graphene and PVDF-Modified Graphene 用基于石墨烯和 PVDF 改性石墨烯的丝网印刷电极进行双氯芬酸的伏安检测

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.058

P. Paunović, Anita Grozdanov, Iva Dimitrievska, Ana Tomova

{"title":"Voltammetric Detection of Diclofenac with Screen-printed Electrodes Based on Graphene and PVDF-Modified Graphene","authors":"P. Paunović, Anita Grozdanov, Iva Dimitrievska, Ana Tomova","doi":"10.15255/kui.2023.058","DOIUrl":"https://doi.org/10.15255/kui.2023.058","url":null,"abstract":"In recent years, the detection and determination of numerous drugs and pharmaceuticals in various media have become crucial aspects of modern healthcare and environmental management. Among the available sensing techniques, electrochem - ical methods, particularly those utilising screen-printed electrodes (SPEs) and different portable equipment have emerged as rapid, effective, sensitive, and inexpensive. This study focuses on the detection of the anti-inﬂammatory drug diclofenac in neutral media. Cyclic voltammetry measurements were conducted to identify diclofenac and determine the kinetics and elec - trochemical mechanism of its oxidation, along with assessing the surface characteristics of the employed SPEs. Graphene and modified graphene SPEs were explored as nanosensors for this purpose. The surface of the graphene SPE was modified using polyvinylidene ﬂuoride, applied through a drop modification procedure. The morphology of the examined SPEs was observed by means of scanning electron microscope, while the electrolyte (0.1 g of diclofenac per litre of phosphate-buffered solution, pH = 7.4) was analysed using UV-Vis spectroscopy. The results indicate that the studied SPEs exhibit promising potential for the detection of diclofenac.","PeriodicalId":511785,"journal":{"name":"Kemija u industriji","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141654139","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

Mikrobiološki rizici sigurnosti i kvalitete tijekom proizvodnje piva 啤酒生产的微生物安全和质量风险

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.061

Ivana Ćosić, Bojan Matijević

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Procjena ekotoksičnosti mikroplastike i nanoplastike na gujavice (kolutićavci, Annelida) i obliće (Nematoda) u tlu 微塑料和纳米塑料对土壤中的豚鼠（结肠虫科，无脊椎动物）和动物（线虫纲）的生态毒性

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.042

Ema Čemerika, Andrea Knežević, Dora Milički, Martina Miloloža

{"title":"Procjena ekotoksičnosti mikroplastike i nanoplastike na gujavice (kolutićavci, Annelida) i obliće (Nematoda) u tlu","authors":"Ema Čemerika, Andrea Knežević, Dora Milički, Martina Miloloža","doi":"10.15255/kui.2023.042","DOIUrl":"https://doi.org/10.15255/kui.2023.042","url":null,"abstract":"It is common knowledge that plastic pollution has become one of the foremost environmental problems worldwide. Despite the increasing rates in plastic products recycling, the majority of plastic still finds its way unchecked into the environment. Plastic in itself poses no substantial threat to ecosystems, unlike its degraded components, microplastics (MP) and nanoplastics (NP), which are more reactive and easier to transport due to their reduced size. In recent years, the increasing demand, production, and utilisation of products originally manufactured in the form of MP and NP have further exacerbated the pollution problem. Once released, MPs and NPs tend to accumulate more in terrestrial ecosystems than in aquatic environments, an area that has been researched more comprehensively. Consequently, the degraded components of plastic accumu - late within soil-dwelling organisms, which can then further break them down (degrade) through their metabolism. The aim of this study was to provide an overview of the ecotoxicity of MP and NP specifically on earthworms, as representatives of the phylum annelid worm (Annelida), and on nematodes (phylum Nematoda), the two most prevalent groups of soil-dwelling invertebrates. Research into the effects of MP and NP on earthworms has so far been conducted on the species Eisenia fetida , Eisenia andrei , and Lumbricus terrestris , with the species Caenorhabditis elegans serving as a representative nematode species. These organisms were exposed to polyethylene (PE), polystyrene (PS), and polypropylene (PP) particles of varying sizes and concentrations. The results of numerous studies on the harmful effects of these polymeric materials on earthworms and nematodes were measured by testing for inhibition of survival and growth rate, showing significant body weight loss, along with damage to the digestive system, and oxidative stress.","PeriodicalId":511785,"journal":{"name":"Kemija u industriji","volume":"58 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141654202","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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Izazovi mikroplastike: onečišćivala koji prijete ekosustavu i ljudskom zdravlju 微塑料：环境和公共健康危害之一

Kemija u industriji Pub Date : 2024-07-12 DOI: 10.15255/kui.2023.045

A. Tolić, Iva Juranović Cindrić, Tamilselvi Selvam, Vlasta Mohaček Grošev, Lara Mikac, Mile Ivanda

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A Model of a Two-step Three-electron Surface Redox Reaction 两步三电子表面氧化还原反应模型

Kemija u industriji Pub Date : 2024-05-15 DOI: 10.15255/kui.2023.041

Milivoj Lovrić

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Nuclear Waste Management: Recycling and Long-term Safe Storage 核废料管理：再循环和长期安全贮存

Kemija u industriji Pub Date : 2024-05-15 DOI: 10.15255/kui.2023.035

Ivana Cetina