Nova Biotechnologica et Chimica最新文献_第6页

Study of anaesthetical activity of alkoxyphenylcarbamic acid esters using statistical methods 烷氧基苯基氨基甲酸酯麻醉活性的统计研究

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1368

T. Ďurčeková, J. Mocák, J. Lehotay, J. Čižmárik

引用次数: 0

Biotechnological tools to improve ethanol production from plant biomass 改进植物生物质乙醇生产的生物技术工具

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1360

J. Faragó

引用次数: 0

Factors affecting bioleaching in the processing of non-metallics 非金属加工中影响生物浸出的因素

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1353

I. Štyriaková

引用次数: 0

Flow-through electrochemistry in the analysis of wine 流动电化学在葡萄酒分析中的应用

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1365

E. Beinrohr, S. Hlubikova, J. Laštincová

引用次数: 0

Long-term effects of a chemical decontamination procedure on the corrosion state of the heat exchanger tubes of steam generators 化学去污程序对蒸汽发生器换热管腐蚀状态的长期影响

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1362

Andrea Szabó Nagy, K. Varga, B. Baja, Z. Németh, Desző Oravetz, Z. Homonnay, E. Kuzmann, J. Schunk

{"title":"Long-term effects of a chemical decontamination procedure on the corrosion state of the heat exchanger tubes of steam generators","authors":"Andrea Szabó Nagy, K. Varga, B. Baja, Z. Németh, Desző Oravetz, Z. Homonnay, E. Kuzmann, J. Schunk","doi":"10.36547/nbc.1362","DOIUrl":"https://doi.org/10.36547/nbc.1362","url":null,"abstract":"Our previous studies have revealed that a ”hybrid” structure of the amorphous and crystalline phases is formed in the outermost surface region of the austenitic stainless steel tubes of steam generators (SGs) as an undesired consequence of the industrial application of the AP-CITROX (AP: alkaline permanganate; CITROX: citric and oxalic acid) decontamination technology. The formation of this mobile oxide-layer increased the amount of the corrosion products in the primary circuit significantly, resulting in magnetite deposition on fuel assemblies. Owing to the fact that there is no investigation method available for the in-situ monitoring of the inner surfaces of heat exchanger tubes, a research project based on sampling as well as on ex-situ electrochemical and surface analytical measurements was elaborated. Within the frame of this project, comprehensive investigation of the general corrosion state and metallographic features of 36 stainless steel specimens, cut out from various locations of the 21 steam generators of the Paks NPP in the time period of 2000-2007 has been performed. The present work gives a brief overview on the general corrosion state of the heat exchanger tubes of SGs, concerning the long-term effects of the AP-CITROX procedure on the chemical composition and structure of the protective oxide-layer.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49631733","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: 1

Determination of long distance transport of Cs+, Co2+ and Zn2+ ions in vascular plants by autoradiography and gamma-spectrometry 射线自显影和γ -能谱法测定维管植物中Cs+、Co2+和Zn2+离子的长距离输运

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1356

M. Horník, M. Pipíška, Jana Sekáčová, J. Augustín

{"title":"Determination of long distance transport of Cs+, Co2+ and Zn2+ ions in vascular plants by autoradiography and gamma-spectrometry","authors":"M. Horník, M. Pipíška, Jana Sekáčová, J. Augustín","doi":"10.36547/nbc.1356","DOIUrl":"https://doi.org/10.36547/nbc.1356","url":null,"abstract":"Heavy metals and radionuclides can enter the food chain via cereals and vegetables grown in contaminated soils. In the case of microelements such as zinc, studies have not focused only to assessing its environmental risk, but also to enhancing its uptake by plants as an important growth-limiting factor. In our study, digitalized autoradiograms of whole plants of celery (Apium graveolens L.), tobacco (Nicotiana tabacum L.) and sunflower (Helianthus annuus L.) grown in hydroponic nutrient media spiked with 137CsCl, 60CoCl2 and 65ZnCl2 were used for quantitative determination of uptake, long-distance transport and distribution of Cs+, Co2+ and Zn2+ ions in plant tissues. Results from autoradiography and gammaspectrometry of plants showed, that cesium was translocated to aboveground part of the plants with the shoot-to-root ratio 1.0 : 0.6. On the contrary, cobalt and zinc were more immobilized in roots, with the shoot-to-root ratio up to 1.0 : 3.8. The highest concentration of cesium, cobalt and zinc, expressed in specific radioactivity per unit of leaf surface (Bq/cm2) was found in top, rapidly growing leaves, the lowest concentration in the oldest leaves in low position. Detection limits 3, 2 and 14 Bq/cm2 by using X-ray film \u0000for 137Cs, 60Co and 65Zn, respectively were obtained. These data correspond to detection limits 10.5 pg Cs+/cm2, 7.2 pg Co2+/cm2 and 785 pg Zn2+/cm2 at specific radioactivity of commercially available 137CsCl, 60CoCl2 and 65ZnCl2. Resolutions 1-2 mm was sufficient for visualization of metal uptake and distribution in roots, stalks, leaves and leaf venation. Obtained data are part of quantitative study of uptake and translocation of both low level-radioactive contamination in plants and microelements applied as fertilizers.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44814260","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

Soil additives immobilising heavy metals in contaminated soils 土壤添加剂对污染土壤中重金属的固定作用

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1352

O. Horak, W. Friesl-Hanl

引用次数: 7

Czech and Slovak young brown coals in environmental applications 捷克和斯洛伐克年轻褐煤在环境方面的应用

Nova Biotechnologica et Chimica Pub Date : 2022-01-13 DOI: 10.36547/nbc.1363

P. Janoš, J. Lesńy, L. Závodsḱa, Silvie Kříženecká, L. Herzogová

{"title":"Czech and Slovak young brown coals in environmental applications","authors":"P. Janoš, J. Lesńy, L. Závodsḱa, Silvie Kříženecká, L. Herzogová","doi":"10.36547/nbc.1363","DOIUrl":"https://doi.org/10.36547/nbc.1363","url":null,"abstract":"In recent time, various kinds of young brown (low-rank) coals are utilized increasingly not only as fuels, but also as valuable materials in advanced environmental applications. It should be noted in this context that significant deposits of the young brown coals can be found both in the Czech Republic as well as in Slovakia. For their effective applications e.g. in wastewater treatment or in soil remediation, the properties of the coals should be studied in more details and numerous physico-chemical characteristics should be measured. As a part of a common Czech-Slovak project, a series of various kinds of coals was collected, including North-Bohemian oxihumolites, lignite from South Moravia and several lignites from Slovakia (Baňa Zahorie). Basic properties were measured, such as acid-base titration curves, contents of main functional groups and sorption capability towards heavy metal cations (Cu2+, Zn2+, Co2+) and some organic pollutants. The contents of humic substances – main active constituents of the young coals – were also determined. Selected environmental applications of the brown coals will be mentioned further, e.g. for the removal of metal cations from waters or in phytoremediation of contaminated soils.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44414850","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

LC-ESI-MS/MS analysis, toxicity and anti-anaemic activity of Rubia tinctorum L. aqueous extract 茜草水提取物的LC-ESI-MS/MS分析、毒性及抗贫血活性

Nova Biotechnologica et Chimica Pub Date : 2022-01-09 DOI: 10.36547/nbc.978

Fatima Zohra Houari, R. Erenler, Sena Bakir, E. Çapanoğlu, A. Hariri

{"title":"LC-ESI-MS/MS analysis, toxicity and anti-anaemic activity of Rubia tinctorum L. aqueous extract","authors":"Fatima Zohra Houari, R. Erenler, Sena Bakir, E. Çapanoğlu, A. Hariri","doi":"10.36547/nbc.978","DOIUrl":"https://doi.org/10.36547/nbc.978","url":null,"abstract":"The present study investigated the chemical profile, toxicity, and anti-anaemic activity of Rubia tinctorum root aqueous extract against phenylhydrazine induced hemolytic anaemia. Phenolic compounds were analyzed by LC-ESI-MS/MS; acute toxicity test was evaluated by administering a single dose of 2,000 mg.kg-1 of the extract; anaemia was induced by administration of 40 mg phenylhydrazine by intraperitoneal injection for 2 days. Moreover, the anti-anaemic activity was evaluated by measuring the haematological parameters of rats treated with iron and aqueous extract for 15 days. The LC-ESI-MS/MS analysis results revealed the presence of 31 phytochemical compounds, among them, citric acid was found as the most abundant. No signs of toxicity or death were recorded, indicating that the LD50 of R. tinctorum root extract is higher than 2,000 mg.kg-1. Furthermore, the aqueous extract increased red blood cell levels by 69.82 and 71.67 % in the groups treated with 200 and 400 mg.kg-1 of the extract, respectively. Besides, a significant increase in hemoglobin from 12.05 ± 0.15 to 12.9 ± 0.52 g.dL-1 was noted in rats treated with 400 mg.kg-1 of extract. Thus, the data indicate that the root extract could be considered a natural source for the treatment of anaemia.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42648517","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

Synthesis and plant growth activity of 2-(4-oxochromen-3-yl)benzothiazolium and -benzoxazolium bromides 2-(4-氧化铬-3-基)苯并噻唑和-苯并恶唑溴化物的合成及植物生长活性研究

Nova Biotechnologica et Chimica Pub Date : 2021-12-04 DOI: 10.36547/nbc.1311

Mária Hanselová, R. Gašparová, M. Lácová

引用次数: 0