Wyniki wyszukiwania

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Detection of microbial contamination of packaging for foodstuffs by using muramic acid as a biomarker

100%

Mielniczuk Z., Pogorzelska Z.

Opakowanie. Special Edition

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2004

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nr 1

2

Localization of the attachment site of oligoglucans to Mesorhizobium loti HAMBI 1148 murein

84%

Karas M., Russa R.

Acta Biochimica Polonica

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2009

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tom 56

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nr 1

155-160

The location and nature of the linkage between peptidoglycan and oligoglucans in the cell wall of Mesorhizobium loti HAMBI 1148 have been defined by the analysis of nitrous acid deamination of peptidoglycan glucosaminyl residues. The MurNH2-Glcn fraction was obtained after converting deaminoacylated and N-deacetylated muramyl residues in the cell wall preparation to lactam forms which were stable during subsequent deamination, followed by reduction and opening of the lactams. GC/MS analysis of this material, subjected to partial hydrolysis and reduction or to methanolysis followed by peracetylation, confirmed the presence of glucosyl residues glycosidically attached to muramic acid. The MALDI-TOF spectroscopic analysis of the deaminated material also revealed the presence of [M-H]- or [M+Na-2H]- ions representing fragments containing muramic acid with one to three linked glucose residues. The analysis of fully methylated neutral oligosaccharides released from the peptidoglycan with lysozyme followed by borohydride reduction showed the presence of di- and trisaccharides lacking the reducing end.

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Assessment of microbial exposure risks from handling of biofuel wood chips and straw - effect of outdoor storage

84%

Sebastian A., Madsen A. M., Martensson L., Pomorska D., Larsson L.

Annals of Agricultural and Environmental Medicine

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2006

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tom 13

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nr 1

Handling of biofuels may release dust particles containing high concentrations of hazardous microorganisms, thus representing a potential occupational health problem. We analysed the microbial dustiness of baled straw (cultivated both conventionally and ecologically) and of wood chips from piles that had been stored outdoors for up to 11 months by using total spore counting, cultivation, and measuring of endotoxin and chemical markers of fungal biomass, lipopolysaccharide, and peptidoglycan. The bacterial dustiness of straw was much greater than of wood chips whereas the fungal dustiness did not differ much. In general, samples taken from the inner part of each biofuel material were dustier than samples taken from the surface, except for fungal and bacterial biomass in wood chips and total fungi and fungal biomass in ecological straw. A considerable increase of bacterial dustiness occurred during storage over summer. Dust from ecological straw contained considerably less of bacterial components than from conventional straw and, in addition, exhibited a less pronounced increase upon storage over summer. In summary, biofuels represent sustainable energy resources of growing economic importance but may at the same time pose significant health problems. We found that storage of biofuels outdoors over summer increased the microbiological dustiness and should therefore be avoided, and that ecological straw contained less of microbe-containing dust than conventional straw and should be preferred since it reduces the exposure to harmful microbiological agents.

4

Structure of cell envelope components of the primary and secondary forms of Xenorhabdus luminescens

59%

Popowska M., Pancer K., Markiewicz Z.

Acta Microbiologica Polonica

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1997

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tom 46

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nr 1

5

Changes in murein composition during the cell cycle of Caulobacter crescentus

59%

Markiewicz Z., Bielecki J.

Acta Microbiologica Polonica

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1992

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tom 41

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nr 3-4

Ograniczanie wyników

2 Acta Microbiologica Polonica

1 Acta Biochimica Polonica

1 Annals of Agricultural and Environmental Medicine

1 Opakowanie. Special Edition

2 Markiewicz Z.

1 Bielecki J.

1 Karas M.

1 Larsson L.

1 Madsen A. M.

1 Martensson L.

1 Mielniczuk Z.

1 Pancer K.

1 Pogorzelska Z.

1 Pomorska D.

1 Popowska M.

1 Russa R.

1 Sebastian A.

1 2009

1 2006

1 2004

1 1997

1 1992

Detection of microbial contamination of packaging for foodstuffs by using muramic acid as a biomarker

Localization of the attachment site of oligoglucans to Mesorhizobium loti HAMBI 1148 murein

Assessment of microbial exposure risks from handling of biofuel wood chips and straw - effect of outdoor storage

Structure of cell envelope components of the primary and secondary forms of Xenorhabdus luminescens

Changes in murein composition during the cell cycle of Caulobacter crescentus