Nova Biotechnologica et Chimica最新文献_第9页

Determination and classification of pollutants in waste water 废水中污染物的测定和分类

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1281

Zuzana Kiralyova, Katja Šnuderl, F. Kraic, J. Mocák

引用次数: 0

Conversion of corn fiber into fuel ethanol 玉米纤维转化为燃料乙醇

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1276

V. Horváthová

{"title":"Conversion of corn fiber into fuel ethanol","authors":"V. Horváthová","doi":"10.36547/nbc.1276","DOIUrl":"https://doi.org/10.36547/nbc.1276","url":null,"abstract":"Corn fiber due to its chemical composition (up to 20% starch, 50 - 60% non-starch polysaccharides) and availability has potential to serve as a substrate for manufacture of various products, including fuel ethanol. This paper deals with assessment of fiber-to-ethanol conversion. The water/dry fiber ratio in suspensions was 10/1. Enzyme liquefaction and saccharification of residual starch in corn fiber was carried out in two steps with thermostable α-amylase (20 min, 120°C) and mixture of pullulanase and glucomalyse (24 hours, 60°C). Procedures resulted in release of 57.7±1.6 mg of glucose per gram of dry fiber basis. It responds to the dextrose equivalent expression to 96.7±2.2%. By fermentation of the starch hydrolysates by yeasts Saccharomyces cerevisiae CCY-11-3 (5% v/v inoculum, 28°C, 72 hours) 0.48 g of ethanol per gram of glucose in hydrolysates was obtained. The solids after starch hydrolysis were separated by filtration and processed by acid pretreatment (0.1 g of conc. HCl/g of biomass/5 ml of water, 120°C, 20 min) with subsequent enzyme hydrolysis (24 hours, 60°C) by the multienzyme preparations containing cellulases and hemicellulases. Overall yield of reducing sugars after these two steps was \u0000740.7±3.9 mg/gram of dry corn fiber basis. Fermentation of lignocellulosic hydrolysates by yeasts Pichia stipitis CCY-39-50-1 and Candida shehatea CCY-29-68-4 (in both cases 5% v/v inoculum, 28°C, 72 hours) resulted in 0.38 and 0.12 g of ethanol per gram of reducing sugars. The results indicate that applied pretreatment methods and used microorganisms are able to produce ethanol from corn fiber.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45266744","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

Chlorine production for water disinfection by the means of photovoltaic panels 利用光伏板生产氯用于水消毒

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1279

S. Hostin, Peter Benedikovič, A. Michalíková

引用次数: 0

The possibility to enhance flavonoids production in Rubia tinctorum L. callus cultures 提高紫檀愈伤组织黄酮类化合物产量的可能性

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1277

D. Kákoniová, E. Űrgeová, Zuzana Juráková

引用次数: 2

Comparison of ten biochemical laboratory tests before and after treatment by statins 他汀类药物治疗前后10项生化实验室指标的比较

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1215

T. Ďurčeková, J. Mocák, J. Balla, Gabriela Gromanová, K. Boronová

引用次数: 0

Cr and Ni simultaneous phytotoxicity and mutagenicity assay 铬和镍同时植物毒性和致突变性试验

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1156

A. Fargašová, Jana Lištiaková

引用次数: 0

Use of phytoremediation techniques for elimination of lead from polluted soils 利用植物修复技术去除污染土壤中的铅

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1217

A. Hegedȕsová, Silvia Jakabová, Andrea Vargová, O. Hegedűs, T. Pernyeszi

{"title":"Use of phytoremediation techniques for elimination of lead from polluted soils","authors":"A. Hegedȕsová, Silvia Jakabová, Andrea Vargová, O. Hegedűs, T. Pernyeszi","doi":"10.36547/nbc.1217","DOIUrl":"https://doi.org/10.36547/nbc.1217","url":null,"abstract":"The effect of chelating agent – EDTA (ethylene-diamine-tetra-acetic acid) was used for induced phytoextraction to increase intensity of lead transfer from roots to aboveground parts of garden pea. Pot experiments with contaminated soil substrata (50 mg Pb.kg-1 and 100 mg Pb.kg-1) were established for experimental purposes in growth chamber. The results showed that application of 5 and 10 mmol EDTA.kg-1 to experimental variants with 100 mg Pb.kg-1 doubled the increase of lead uptake by pea roots in comparison with variants without EDTA addition, which was statistically confirmed. Intensive lead transfer was observed from roots to aboveground parts of pea after application of 5 and 10 mmol EDTA.kg-1 in variant with 50 mg Pb.kg-1 (40-fold increase), as well as in variant with 100 mg Pb.kg-1 (17-fold increase). The results showed that induced phytoextraction can improve the mobility of lead from soil to plant roots. Application of 5 mmol EDTA.kg-1 resulted to 40-fold increase of lead transfer to green plant parts, despite the fact, that garden pea does not belong to conventional metal hyperaccumulating plant species. Following the results, pea could be used for decontamination of arable soil. The optimal EDTA concentration seems to be 5 mmol.kg-1. Therefore, application of 10 mmol EDTA.kg-1 decreased root mass about 55%, which resulted to decrease the intensity of lead uptake.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47389070","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: 6

Microbial dechlorination of polychrolinated biphenyls 多氯联苯的微生物脱氯

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1158

V. Dudková, K. Demnerova, D. Bedard

{"title":"Microbial dechlorination of polychrolinated biphenyls","authors":"V. Dudková, K. Demnerova, D. Bedard","doi":"10.36547/nbc.1158","DOIUrl":"https://doi.org/10.36547/nbc.1158","url":null,"abstract":"Polychlorinated biphenyls (PCBs) are organic xenobiotics contaminating environment for at least 50 years. They could be eventually eliminated by various organisms under different conditions. The degree of chlorine substitution per biphenyl molecule influences biodegradability which decreases with increasing chlorination. Our work is focused on the PCBs biodegradation under anaerobic conditions. The suitable high chlorinated biphenyls are converted via reductive dechlorination to the chlorinated biphenyls with lower extent of chlorine, which could be eventually fully mineralized by aerobic bacteria. Microbial consortium was isolated from sediment of Strážský Creek (located near by plant producing PCBs in the past). This consortium was able to dechlorinate polychlorinated biphenyls under anoxic conditions. The effectiveness of this process was tested under different cultivation condition – different energetic sources (Aroclor 1248 or Aroclor 1260 or Delor 103 or Delor 106), addition of potential electron donors (pyruvate, lactate or acetate with hydrogen) and further if there is necessary to add yeast extract into fresh low sulphur cultivation media. \u0000Our microbial consortia so far do not need supplementation by non-contaminated sediment to maintain dechlorination activity. Addition of yeast extract is non essential, but needs to be further proved in serial transfers. In all cases (except acetate without yeast extract) dechlorination proceeds at meta- and flanked paraposition.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45095741","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

Antimicrobial effects of essential oils from Tanacetum vulgare L. and Salvia officinalis L., growing in Slovakia 产自斯洛伐克的丹参和鼠尾草精油的抗菌作用

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1273

M. Mikulášová, Š. Vaverková

引用次数: 6

Chemometric characterization of textile waste waters from different processes 不同工艺纺织废水的化学计量学特征

Nova Biotechnologica et Chimica Pub Date : 2021-11-22 DOI: 10.36547/nbc.1272

T. Jerič, Darinka Brodnjak Vončina, Alenka Majcen Le Maréchal, Darja Kavšek

{"title":"Chemometric characterization of textile waste waters from different processes","authors":"T. Jerič, Darinka Brodnjak Vončina, Alenka Majcen Le Maréchal, Darja Kavšek","doi":"10.36547/nbc.1272","DOIUrl":"https://doi.org/10.36547/nbc.1272","url":null,"abstract":"The aim of this work is focused on water quality classification of the textile waste water streams and evaluation of pollution. Data from the chemical characterization of the effluents were elaborated to identify a useful separation in potentially treatment for reuse. This was done with the aim of realizing a full scale characterization of effluents. In the two textile companies analyzed, machineries are used to carry out different production processes such as sizing and desizing, weaving, scouring, bleaching, mercerizing, carbonizing, fulling, dying and finishing. Different process effluents from the same machinery were found to be very diverse in pollution level. 25 and 49 samples of textile waste waters from two different textile companies were analysed and physical chemical measurements were performed. The following physicochemical and chemical water quality parameters were controlled: absorbance measured at three different wavelengths, pH, conductivity, turbidity, total suspended solids, volatile suspended solids, chemical oxygen demand, metals content (Ba, Ca, Cu, Mn, K, Sr, Fe, Al, Na) and total nitrogen content. For \u0000handling the results, basic statistical methods for the determination of mean and median values, standard deviations, minimal and maximal values of measured parameters and their mutual correlation coefficients, were performed. Different chemometric methods, namely, principal component analysis (PCA), cluster analysis (CA), and linear discriminant analysis (LDA) were used to find hidden information about textile waste water quality.","PeriodicalId":19210,"journal":{"name":"Nova Biotechnologica et Chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41707579","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