Wyniki wyszukiwania - BazTech

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Bioconversion of Waste Foolscap and Newspaper to Fermentable Sugar

Ojewumi Modupe E., Kolawole Oluwatobi E., Oyekunle Daniel T., Taiwo Olugbenga S., Adeyemi Alaba O.

Journal of Ecological Engineering

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2019

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Vol. 20, nr 4

35--41

EN

The aim of this project work was to evaluate the effect of bacteria – Serratia in the enzymatic hydrolysis of Foolscap [FS] and Newspaper [NP] into fermentable or reducing sugars. The effect of temperature and hydrolysis time (number of days) on the extent of concentration of reducing sugar yield were assessed and quantified using Dinitrosalicylic acid test method (DNS). A proximate analysis was carried out on the substrate before hydrolysis. Alkaline pre-treatment using sodium hydroxide and deinking process for the removal of paper with ink for higher susceptibility of the substrate before the enzymatic hydrolysis were carried out. The temperature effect on the waste sample were analysed at 37°C, 40°C and 45°C for 7 days, it was observed that at 37°C, saccharification was higher than at 40°C and 45°C. The general observation was in that Serratia had a very good effect on the waste paper samples. A 3-D surface plot revealed that the yield of sugar increased along with the hydrolysis time (number of days), with Foolscap having the highest yield of about 21mg/ml. The comparative analysis shows that the highest yield was obtained at the temperature of 37°C, for both substrates used.

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Zastosowanie katalazy w rozkładzie nadtlenku wodoru

Czyżewska K., Trusek-Hołownia A.

Inżynieria i Aparatura Chemiczna

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2017

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Nr 3

64--65

PL

Zaprezentowano efekty immobilizacji katalazy wyizolowanej z psychrotolerancyjnych mikroorganizmów z rodzaju Serratia, na powierzchni membrany z regenerowanej celulozy. Uzyskane rezultaty potwierdzają zwiększenie stabilności preparatu enzymatycznego na drodze immobilizacji w obecności wysokich stężeń substratu (do 40 g/l) przy pH 10.

EN

In this work the results of catalase immobilization, isolated from psychrotolerant microorganisms of Serratia genus, on the regene- rated-cellulose membrane surface are shown. Obtained results confirm that catalase immobilization led to the increase of enzyme stability at the presence of high substrate concentrations (up to 40 g/L), at pH 10.

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Microbiological contaminants in cosmetics – isolation and characterization

Budecka A., Kunicka-Styczyńska A.

Biotechnology and Food Science

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2014

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Vol. 78, nr 1

15--23

EN

Cosmetic industries are not obliged to produce sterile cosmetics. Nevertheless, they are liable to assure safety of the product to the potential consumer. The purpose of the study was isolation and identification of microorganisms with the ability to survive and develop in cosmetics. Five cosmetics applied for facial skin and one cosmetic for body care were tested for the presence of contaminating microbiota. Eight microbial strains were isolated from three cosmetics, from which seven were derived from cosmetic applied on the facial skin. One strain was isolated from body care cosmetic. The recovered microbial strains were characterized and identified to the species level as Pseudomonas aeruginosa, Serratia liquefaciens and Candida parapsilosis. The isolates were opportunistic pathogens and may cause skin irritation and infections, especially via wounded epithelium in immunocompromised consumers. Moreover, due to application area, they pose a health risk to the consumer due to easy access to the eye area as well as nasal and oral cavities through usage of cosmetic preparation.