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Original Paper | 27-September-2017

Changes in the Concentration of Carbonyl Compounds during the Alcoholic Fermentation Process Carried out with Saccharomyces cerevisiae Yeast

first hours of the fermentation, regardless of the yeast strain applied. The acetaldehyde concentration decreased over the time with the decreasing productivity, reaching its lowest value at the 72nd hour of the process. The final concentration of acetaldehyde depended on the raw material used (ca 28.0 mg/l EtOH for maize mashes, 40.3 mg/l EtOH for rye mashes, and 74.4 mg/l EtOH for amaranth mashes). The effect of the used yeast strain was negligible.The overall concentration of the analyzed

Grzegorz Kłosowski, Dawid Mikulski, Aleksandra Rolbiecka, Bogusław Czupryński

Polish Journal of Microbiology, Volume 66 , ISSUE 3, 327–334

Original Paper | 27-September-2017

The Ability of a Novel Strain Scheffersomyces (Syn. Candida) shehatae Isolated from Rotten Wood to Produce Arabitol

Arabitol is a polyalcohol which has about 70% of the sweetness of sucrose and an energy density of 0.2 kcal/g. Similarly to xylitol, it can be used in the food and pharmaceutical industries as a natural sweetener, a texturing agent, a dental caries reducer, and a humectant. Bio­technological production of arabitol from sugars represents an interesting alternative to chemical production. The yeast Scheffersomyces shehatae strain 20BM-3 isolated from rotten wood was screened for its ability

Monika Kordowska-Wiater, Adam Kuzdraliński, Tomasz Czernecki, Zdzisław Targoński, Magdalena Frąc, Karolina Oszust

Polish Journal of Microbiology, Volume 66 , ISSUE 3, 335–343

Original Paper | 30-March-2017

Screening and Identification of Yeasts Antagonistic to Pathogenic Fungi Show a Narrow Optimal pH Range for Antagonistic Activity

Microbes have evolved ways of interference competition to gain advantage over their ecological competitors. The use of secreted antagonistic compounds by yeast cells is one of the prominent examples. Although this killer behavior has been thoroughly studied in laboratory yeast strains, our knowledge of the antagonistic specificity of killer effects in nature remains limited. In this study, yeast strains were collected from various niches and screened for antagonistic activity against one toxin

Pei-Hua Chen, Jui-Yu Chou

Polish Journal of Microbiology, Volume 66 , ISSUE 1, 101–106

Short Communication | 27-September-2017

Genes Controlling 2-deoxyglucose Induced Lysis and Formation of Reactive Oxygen Species in Schizosaccharomyces pombe

Akshay Vishwanatha, Cletus J.M. D’Souza, Martin E. Schweingruber

Polish Journal of Microbiology, Volume 66 , ISSUE 3, 393–396

Original Paper | 04-December-2017

Production, Characterization and Valuable Applications of Exopolysaccharides from Marine Bacillus subtilis SH1

characterization and investigation of different valuable applications. Effect of medium type, incubation period and pH were studied using the one factor at a time experiments. It was shown that the highest productivity (24 gl–1) of exopolysaccharides was recorded by using yeast malt glucose medium with pH 9 at the fourth day of incubation. Experimental design using Response Surface Methodology (RSM) was applied to optimize various nutrients at different concentrations. The finalized optimized medium

Sahar W.M. Hassan, Hassan A.H. Ibrahim

Polish Journal of Microbiology, Volume 66 , ISSUE 4, 449–461

Article | 24-July-2017

The Effects of Nutrient Concentration, Addition of Thickeners, and Agitation Speed on Liquid Fermentation of Steinernema feltiae

Entomopathogenic nematode production in liquid fermentation still requires improvements to maximize efficiency, yield, and nematode quality. Therefore, this study was aimed at developing a more suitable liquid medium for mass production of  Steinernema feltiae, by assessing the effects of nutrient concentration, thickeners (primarily agar), and agitation speed on infective juvenile (IJ) yield. Base medium (BM) contained yeast extract (2.3%), egg yolk (1.25%), NaCl (0.5%), and

LUIS G. LEITE, DAVID I. SHAPIRO-ILAN, SELCUK HAZIR, MARK A. JACKSON

Journal of Nematology, Volume 48 , ISSUE 2, 126–133

Original Paper | 09-March-2018

A Low-Tech Bioreactor System for the Enrichment and Production of Ureolytic Microbes

Ureolysis-driven microbially induced carbonate precipitation (MICP) has recently received attention for its potential biotechnological applications. However, information on the enrichment and production of ureolytic microbes by using bioreactor systems is limited. Here, we report a low-tech down-flow hanging sponge (DHS) bioreactor system for the enrichment and production of ureolytic microbes. Using this bioreactor system and a yeast extract-based medium containing 0.17 M urea, ureolytic

Masataka Aoki, Takuya Noma, Hiroshi Yonemitsu, Nobuo Araki, Takashi Yamaguchi, Kazuyuki Hayashi

Polish Journal of Microbiology, Volume 67 , ISSUE 1, 59–65

Original Paper | 04-December-2017

Characterisation of Antimicrobial Properties of Extracts of Selected Medicinal Plants

antimicrobial activity against the tested strains was demonstrated by black elder (Sambucus nigra L.), black locust (Robinia pseudoacacia L.) and lingonberry (Vaccinium vitis-idaea L.) extracts. The study showed the diverse morphological activity of specific parts of elderberry and quince, which is the effect of different polyphenolic profile of these plants. The yeast Saccharomyces cerevisiae, Escherichia coli, Pseudomonas putida and Bacillus subtilis showed the highest sensitivity to the effect of

Monika Cioch, Paweł Satora, Magdalena Skotniczy, Dorota Semik-Szczurak, Tomasz Tarko

Polish Journal of Microbiology, Volume 66 , ISSUE 4, 463–472

Original Paper | 10-December-2018

Emodin Reduces the Activity of (1,3)-β-D-glucan Synthase from Candida albicans and Does Not Interact with Caspofungin

Abstract Candidiasis is the most common opportunistic yeast infection, with Candida albicans as a paramount causative species. (1,3)-β-D-glucan is one of the three main targets of clinically available antifungal agents used to treat Candida infections. It is one of the most abundant fungal cell wall components. Echinocandins represent the newest class of antifungals affecting cell wall biosynthesis through non-competitive inhibition of (1,3)-β-D-glucan synthase. Therefore, treatment with

MONIKA JANECZKO

Polish Journal of Microbiology, Volume 67 , ISSUE 4, 463–470

Original Paper | 15-March-2016

Recovery of Gram-Positive Cocci and Candida albicans from Peroxygen/Silver-Based Disinfectants

Neutralization method evaluation is an important first step in a disinfectant validation study program. It is also crucial in assessment of the efficiency of microbial recovery media in the presence of a residual biocidal agent. In the present study, four commercially available peroxygen/silver-based disinfectant formulae – intended to be used in a pharmaceutical facility sanitization program – were tested at two dilutions against three Gram-positive cocci and one yeast

Mostafa E. Eissa, Ahmed S. Nouby

Polish Journal of Microbiology, Volume 65 , ISSUE 1, 13–21

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