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Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia
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This is an Open Access Journal

Open Access journal
ISSN (Print) 0066-2232 - ISSN (Online) 2083-3563
Published by Wydawnictwo UMCS

[26 journals]

Panax quinquefolium hairy root extracts and their effect in connections
with antibiotics against pathogenic bacteria – preliminary study
- Authors: Ewa Kochan
  Pages: 7 - 17
  Abstract: The aim of the present study was to determine the level of ginsenosides in extracts from hairy root A, B, G clones of Panax quinquefolium and their action with antibiotics against clinical bacterial isolates. The content of ginsenosides (the key biologically active compounds) were determined in tested extracts using HPLC. The activity of extracts with antibiotics was established by micro-dilution broth method. Total triterpene saponin content was 14.68, 14.32 and 10.07 mgg-1 d.w. for root culture clones B, A and G, respectively. Our research indicates that the addition of extracts mainly from B and G clone hairy root cultures to antibiotics allow to reduce the ampicillin and tetracycline effective concentration respectively against Enterococcus faecalis and both Escherichia coli and Acintobacter baumannii.
  
  PubDate: 2019-06-10
  DOI: 10.17951/c.2018.73.1.7-17
  Issue No: Vol. 73, No. 1 (2019)
Assessing accuracy of barley yield forecasting with integration of climate
variables and support vector regression
- Authors: Laleh Parviz
  Pages: 19 - 30
  Abstract: Investigations of the relation between crop yield and climate variables are crucial for agricultural studies and decision making related to crop monitoring. Multiple linear regression (MLR) and support vector regression (SVR) are used to identify and model the impact of climate variables on barley yield. The climate variables of 36 years (1982–2017) are gathered from three provinces of Iran with different climate: Yazd (arid), Zanjan (semi-arid), Gilan (very humid). Air temperature by high correlation coefficient with barley yield was introduced as the dominant climate variable. According to evaluation criteria, SVR provided accurate estimation of crop yield in comparison with MLR. The diversity of climate impressed the estimated yield in which UI, decreasing from Gilan to Yazd provinces, was 47.77%. Support vector machine (SVM) with capturing the nonlinearity of time series, could improve barley yield estimation, with the minimum UI for Yazd province. Also, the minimum correlation coefficient between the observed and simulated yield was found in Gilan province. Based on GMER calculations, SVM forecasts were underestimated in three provinces. All findings show that SVM is able to have high efficiency to model the climate effect on crop yield.
  PubDate: 2019-06-10
  DOI: 10.17951/c.2018.73.1.19-30
  Issue No: Vol. 73, No. 1 (2019)
Usnea jørgenseniana Bystr. & Leśniewska sp. nova Usnea (subgen. Usnea,
Parmeliaceae) in Sweden
- Authors: Jan Bystrek, Joanna Leśniewska
  Pages: 31 - 39
  Abstract: Usnea jørgenseniana Bystr. & Leśniewska sp. nova, an epixilic species of bushy Usnea (Parmeliaceae) in Sweden, is similar to U. hirta var. minutissima (Mer.) Bystr., but the similarity to U. hirta is apparent. U. jørgenseniana is not a species from the foveatae Mot. section. The lack of soralia and a very small thallus (0.3–2.0 cm) makes it difficult to locate U. jørgenseniana in the section Comosae Mot. It colonizes exceptionally unfavorable climatic conditions, a coprophilous species. Collected by G. Ohrstedt in 1937. Dozens of specimens from one position.
  PubDate: 2019-06-10
  DOI: 10.17951/c.2018.73.1.31-39
  Issue No: Vol. 73, No. 1 (2019)
Ecological and biological aspekt new locality of Drosera anglica Huds.
near Końskich
- Authors: Ryszard Plackowski
  Pages: 41 - 46
  Abstract: The work concerns the occurrence conditions Drosera anglica. (EN) within the site located 10 km from the village of au nord Końskie near the Czarna River. The species is very dispersed but in a few places the density was 5-10 of specimens per 1m2. This species grows within a patch which is poor in terms of its flora. No significant expansion of trees or shrubs has been noted. This is related to quite a high level of water. Such conditions are favourable to the development of another species under threat of extinction, Rhynchospora alba. Plant-based patches with participation of sundew are heterogeneous in terms of syntaxonomy. Presence of species has been observed, e.g. from the classes of Phragmitetea and Scheuchzerio-Caricetea nigrae. Soil analyses indicate that the soils under observation are not very acidic, with average content of CaO and ash content which is optimal for this species with the ratio of C:N which indicates a temporary mire. The content of heavy metals is in norm and poses no threat to the surroundings (Pb 64-65 ppm, Cd 2.7-2.9 ppm). Wide ranges in the analysed samples refer to chromium. They do not have an adverse effect on the development of Drosera anglica. A very crucial threat is the consequence of succession, competition and hydrological conditions.
  PubDate: 2019-06-10
  DOI: 10.17951/c.2018.73.1.41-46
  Issue No: Vol. 73, No. 1 (2019)
Diagnosis and treatment of invasive Candida infections – a review
article
- Authors: Marta Dąbrowska, Monika Sienkiewicz, Paweł Kwiatkowski, Michał Dąbrowski
  Pages: 47 - 59
  Abstract: Candida albicans is the most common cause of fungal infections worldwide. Invasive candidiasis comprises candidemia and deep-seated candidiasis. Most yeast invasive infections are endogenous with a high mortality. Pathogenesis of candidiasis depends on avoiding host immune responses, as well as the virulence factors of the fungus enabling colonization and invasion of tissues. Adequate source control and antifungal therapy administered within a short time is critical to get a better prognosis. The emergence of drug resistance and the side effects of currently available antifungals are becoming the major problem in the management of Candida spp. infection.
  PubDate: 2019-06-10
  DOI: 10.17951/c.2018.73.1.47-59
  Issue No: Vol. 73, No. 1 (2019)
Diagnosis and treatment of mucosa Candida spp. infections – a review
article
- Authors: Marta Dąbrowska, Monika Sienkiewicz, Paweł Kwiatkowski, Michał Dąbrowski
  Pages: 61 - 68
  Abstract: Candida albicans is the most common cause of fungal infections worldwide. Non-albicans Candida species play an important role in vulvovaginal candidiasis and invasive infections. Most cases of infections are endogenous. In case of patients with immune disorders this opportunistic pathogen causes both surface, systemic infections, and candidemia. Symptoms depend on the area affected. Candidiasis are treated with antimycotics; these include clotrimazole, nystatin, fluconazole, voriconazole, amphotericin B, and echinocandins. The emergence of drug resistance and the side effects of currently available antifungals are becoming a major problem in the management of Candida spp. infection.
  PubDate: 2019-06-10
  DOI: 10.17951/c.2018.73.1.61-68
  Issue No: Vol. 73, No. 1 (2019)

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