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Number of results: 11
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Abstract

China has experienced the rapid emergence and development of private higher education in the recent decades. This article focuses on the current situation in several key areas, such as development of non-state education, globalization influence at chinse non-state education and social stratification in this sector. It shows regional diversity and random planning in private higher education and also stress situation low-income groups. Moreover it presents acquisition of labour market qualification by mentioned groups. This study concludes that proper financing and management in an urgent thing to do and in the future it will benefit from to Chinese society through multiple roles.
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Authors and Affiliations

Anna Mańkowska
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Abstract

A bibliography of Jerzy Mańkowski, which includes his scholarly writings, translations and edited works, arranged in chronological order.
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Authors and Affiliations

Justyna Mańkowska
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Abstract

Electrophoretic methods were used to identify protein complexes formed between ostrich egg yolk lipoprotein fractions (LPFo) with seminal plasma (SP) of fractionated ejaculates, and to investigate the effect of these complexes on boar semen quality after cryopreservation. Chromatographic SP fractions (F1, F2 and F3), with or without LPFo solution, were subjected to sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis. Comparative electrophoretic analyses of the SP revealed marked differences in the SDS-PAGE protein profiles among boars. Electrophoretic analyses showed that the interactions of LPFo with SP resulted in the appearance of high-intensity protein bands. Spermatozoa were exposed to SP chromatographic fractions originating from F1, F2 and F3, and the whole SP (wSP) before being frozen. Spermatozoa exposed to F1 and F2 exhibited significantly higher post-thaw motility compared to those treated with either F3 or wSP. In most of the boars the proportions of membrane-intact frozen-thawed spermatozoa differed among the treatments, being significantly lower in the wSP-treated samples. The incidence of frozen-thawed spermatozoa with DNA fragmentation was less prevalent in samples exposed to F3 or the wSP. The results of this study confirmed that the interactions of LPFo with fractionated SP during the cooling period contributed to alterations in the sperm membranes, rendering them less susceptible to temperature-related injury.

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Authors and Affiliations

L. Fraser
Ł. Zasiadczyk
J. Strzeżek
W. Kordan
A. Mańkowska
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Abstract

The paper contains a short literature review on the subject of special type of thin film structures with resistiveswitching memory effect. In the literature, such structures are commonly labeled as "memristors". The word "memristor" originates from two words: "memory" and "resistor". For the first time, the memristor was theoretically described in 1971 by Leon Chua as the 4th fundamental passive electronics element with a non-linear current-voltage behavior. The reported area of potential usage of memristor is enormous. It is predicted that the memristor could find application, for example in the domain of nonvolatile random access memory, flash memory, neuromorphic systems and so forth. However, in spite of the fact that plenty of papers have been published in the subject literature to date, the memristor still behaves as a "mysterious" electronic element. It seems that, one of the important reasons that such structures are not yet in practical use, is unsufficient knowledge of physical phenomena determining occurrence of the switching effect. The present paper contains a literature review of available descriptions of theoretical basis of the memristor structures, used materials, structure configurations and discussion about future prospects and limitations.

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Authors and Affiliations

Jarosław Domaradzki
Damian Wojcieszak
Tomasz Kotwica
Ewa Mańkowska
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Abstract

Abiotic stressors contribute to growth restriction and developmental disorders in plants. Early detection of the first signs of changes in plant functioning is very important. The objective of this study was to identify chlorophyll fluorescence parameters that change under phosphorus deficiency stress in cucumber. In this work, a trail to study the early changes caused by phosphorus deficiency in cucumber plants by analysing their photosynthetic performance is presented. Chlorophyll- a fluorescence (ChF) parameters were measured every 7 days for a period of 28 days. Measurements were made separately on young and old leaves and on cucumber fruit. Parameters that decreased during the stress were: p2G, PI abs, PI total, REo/CS o, and TRo/CSo. P deficiency decreased total electron carriers per RC ( ECo/RC), yields ( TRo/ABS ( Fv/Fm), ETo/TRo, REo/ETo, ETo/ABS and REo/ABS), fluxes ( REo/RC and REo/CSo) and fractional reduction of PSI end electron acceptors, and damaged all photochemical and non-photochemical redox reactions. Principal component analysis revealed a group of ChF parameters that may indicate early phosphorus deficiency in cucumber plants. Our results are used in the discovery of sensitive bioindicators of phosphorus deficiency in cucumber plants. Most JIP test parameters are linked to mathematical equations, so we recommend using of advanced statistical tools, such as principal component analysis, which should be considered very useful for stress identification. It has also been shown to be more effective in multivariate methods compared to univariate statistical methods was demonstrated.
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Authors and Affiliations

Leszek Sieczko
1
ORCID: ORCID
Piotr Dąbrowski
2
ORCID: ORCID
Katarzyna Kowalczyk
3
ORCID: ORCID
Janina Gajc-Wolska
3
ORCID: ORCID
Wojciech Borucki
4
ORCID: ORCID
Monika Janaszek-Mańkowska
5
ORCID: ORCID
Waldemar Kowalczyk
6
ORCID: ORCID
Domenica Farci
7
Hazem M. Kalaji
7
ORCID: ORCID

  1. Warsaw University of Life Sciences – SGGW, Department of Biometry, Institute of Agriculture, 166 Nowoursynowska St., 02-787 Warsaw, Poland
  2. Warsaw University of Life Sciences – SGGW, Department of Environmental Management, Institute of Environmental Engineering, Poland
  3. Warsaw University of Life Sciences – SGGW, Department of Vegetable and Medicinal Plants, Institute of Horticultural Sciences, Poland
  4. Warsaw University of Life Sciences – SGGW, Department of Botany, Institute of Biology, Poland
  5. Warsaw University of Life – SGGW, Department of Fundamentals of Engineering and Power Engineering, Institute of Mechanical Engineering, Poland
  6. The National Institute of Horticultural Research, Skierniewice, Poland
  7. Warsaw University of Life Sciences – SGGW, Department of Plant Physiology, Institute of Biology, Poland

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