23 research outputs found
Non-specific LTD at parallel fibre - Purkinje cell synapses in cerebellar cortex provides robustness against local spatial noise during pattern recognition
© 2011 Safaryan et al; licensee BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citedPoster presented at CNS 2011Peer reviewe
The beneficial effects of non-specific synaptic plasticity for pattern recognition in auto-associative memory
© 2011 Calcraft et al; licensee BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Poster presented at CNS 2011Non peer reviewe
26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 - Meeting Abstracts - Antwerp, Belgium. 15–20 July 2017
This work was produced as part of the activities of FAPESP Research,\ud
Disseminations and Innovation Center for Neuromathematics (grant\ud
2013/07699-0, S. Paulo Research Foundation). NLK is supported by a\ud
FAPESP postdoctoral fellowship (grant 2016/03855-5). ACR is partially\ud
supported by a CNPq fellowship (grant 306251/2014-0)
Wpływ podłoża po uprawie pieczarki Agaricus bisporus na specjację chromu i miedzi w poziomie próch nicznym gleby
Spent mushroom substrate used as fertilizing material provides nutrients for plants in
forms with a different degree of availability. A two-year experiment was conducted in central
eastern Poland (Siedlecka High Plain) to determine the fertilizing effect of substrate previously
used to grow mushrooms
(Agaricus bisporus)
on the total content chromium and copper content
and their quantitative content in the fraction in humus horizon pseudogley loessive soil. The
experiment included the control (without fertilization), and several fertilized variants: NPK,
swine manure, swine manure + NPK, spent mushroom substrate and spent mushroom substrate
+NPK. The sequential fractionation of chromium and copper, carried out according to the BCR
protocol, in the soil humus horizon under the above treatments demonstrated various concentration of these metals in the extracted fractions and their shares in the total content. Fertilization
with spent mushroom substrate alone and with NPK contributed to a decrease in the Cr content
in the F2 and F3 fractions, but resulted in an increase in the Cu content in the F1, F2 and F3
fractions after the second year of plant cultivation in comparison with the first year. The highest
share of the tested metals in the total content was detected in the residual fraction F4: after the
second year for chromium and after the first year of the experiment for copper
Cynk w wydzielonych sekwencyjnie frakcjach sześciu gleb stoku morenowego
The aim of the study was to evaluate the total content of zinc in the fractions separated from the soils located in two transects on the moraine slope of the Siedlecka High Plain (some situated above and some beneath the underground municipal landfill site). The highest total content of zinc was detected in the soils situated beneath the underground municipal landfill site. The sequential fractioning was performed by the Zeien-Brümmer method. The speciation analysis revealed that this metal was bound to different components of the soil solid phase. The highest percentage of zinc content was detected in the residual fraction F7 in the parent rock horizons and the lowest was noted in the bioavailability fractions, i.e. exchangeable F2 and easilyeasily soluble F l. In transects A and B of the tested soils significant correlations were found between the content of zinc in the separated fractions and its total content, the total content of iron and manganese, clay fraction <0.002 mm, cation exchange capacity (CEC) as well as between the content of carbon organic compound and zinc in the F4 organic fraction
Profilowe zróżnicowanie zawartości frakcji ołowiu i chromu w glebach położonych na stoku morenowym
In order to evaluate a potential threat to soil environment by heavy metals, it is important
to separate and determine their fractions by means of sequential extraction.
The research aimed at evaluating the total content of lead and chromium as well as
their fractions in soils localized on a moraine slope in the Siedlce Heights (transects A and
B). Sequential fractionation of these elements was carried out according to Zeien and
Brümmer’s method. Chemical analyses revealed varied contents of seven lead and chromium
fractions in the soils. The largest amounts of both heavy metals were mostly recorded
in the residual fraction (F7), and those of lead also in the organic fraction (F4). The
least lead was found in the exchangeable fraction (F2) (it was not detected in easily soluble
fraction F1), while the least chromium appeared in the easily soluble (F1) and organic
fractions (F4). Statistical processing revealed that the examined lead and chromium fractions
generally depended on separated fractions, total contents of these metals, and some
properties of analyzed soils.Dla oceny potencjalnego zagrożenia środowiska glebowego przez metale ciężkie istotne
jest wydzielenie i ilościowe zbadanie ich frakcji na drodze ekstrakcji sekwencyjnej.
Celem pracy by³o zbadanie ogólnej zawartości ołowiu i chromu oraz ich frakcji w glebach
położonych na stoku morenowym Wysoczyzny Siedleckiej (transekt A i B). Frakcjonowanie
sekwencyjne tych pierwiastków przeprowadzono według metody Zeiena i Brümmera.
Wykazano zróżnicowaną zawartość wydzielonych siedmiu frakcji ołowiu i chromu
w badanych glebach. Najwięcej obydwu metali stwierdzono (w przeważającej większości) we
frakcji rezydualnej F7, a najwięcej ołowiu we frakcji organicznej (F4). Najmniej ołowiu
stwierdzono we frakcji wymiennej F2 (we frakcji łatwo rozpuszczalnej F1 nie został on wykryty),
a najmniej chromu we frakcji łatwo rozpuszczalnej (F1) oraz organicznej (F4). Obliczenia
statystyczne wykazały, że badane frakcje ołowiu i chromu były przeważnie istotnie
zależne od wydzielonych frakcji, ogólnej zawartości tych metali oraz niektórych właściwości
analizowanych gleb
Impact of a spent mushroom substrate, Agaricus bisporus on chromium and copper speciation in the humus horizon
Spent mushroom substrate used as fertilizing material provides nutrients for plants in
forms with a different degree of availability. A two-year experiment was conducted in central
eastern Poland (Siedlecka High Plain) to determine the fertilizing effect of substrate previously
used to grow mushrooms
(Agaricus bisporus)
on the total content chromium and copper content
and their quantitative content in the fraction in humus horizon pseudogley loessive soil. The
experiment included the control (without fertilization), and several fertilized variants: NPK,
swine manure, swine manure + NPK, spent mushroom substrate and spent mushroom substrate
+NPK. The sequential fractionation of chromium and copper, carried out according to the BCR
protocol, in the soil humus horizon under the above treatments demonstrated various concentration of these metals in the extracted fractions and their shares in the total content. Fertilization
with spent mushroom substrate alone and with NPK contributed to a decrease in the Cr content
in the F2 and F3 fractions, but resulted in an increase in the Cu content in the F1, F2 and F3
fractions after the second year of plant cultivation in comparison with the first year. The highest
share of the tested metals in the total content was detected in the residual fraction F4: after the
second year for chromium and after the first year of the experiment for copper
Neuroprotective action of proline-rich polypeptide-1 in β-amyloid induced neurodegeneration in rats
Original article can be found at: http://www.sciencedirect.com/ Copyright Elsevier [Full text of this article is not available in the UHRA]It is recognized that the main trigger of Alzheimer disease related neurodegeneration is β-amyloid peptide, which subsequently generates different metabolic disorders in neuron and finally leads to neuronal death. Several biologically active products were tested as neuroprotectors, but only few of them demonstrated any efficiency.Proline-rich polypeptide-1 was tested as a neuroprotective agent on Aβ25-35 animal model of Alzheimer disease. Biochemical analysis (determination of spectrum of neuroactive amino acids, such as glutamate, gamma-aminobutyric acid, glycine, aspartate and taurine), as well as behavioral, electrophysiological and morphological studies were performed to reveal the neuroprotective potential of proline-rich polypeptide in rats.Based on the results of our study it can be concluded that proline-rich polypeptide-1 has a potential to be one of the effective preventive or therapeutic agents against neurodegenerative disorders, such as Alzheimer disease.Peer reviewe
Oxidative Stress Markers and Sperm DNA Fragmentation in Men Recovered from COVID-19
SARS-CoV-2 negatively affects semen characteristics, impairs various biochemical processes in seminal fluid and within spermatogenic cells ultimately leading to male fertility decline. However, the distinct mechanisms, in particular, the role of oxidative stress on the consequences of coronavirus infection, have not been well investigated, which is the purpose of the present study. The standard semen parameters, its pro- and antioxidant system state, as well as the level of sperm DNA fragmentation, were assessed in 17 semen samples of men five months after the coronavirus infection and in 22 age-matched control patients. We determined that the DNA fragmentation rate negatively correlated with the period after coronavirus recovery, as well as seminal fluid superoxide dismutase activity and uric acid level. It was demonstrated that COVID-19 is not always associated with increased DNA fragmentation, allowing them to be considered as two independent factors. Thus, the most significant changes were noted in the samples of men after COVID-19 and abnormal TUNEL results: increased round cell number, decreased seminal fluid’s nitrotyrosine level, and total antioxidant capacity and Zn, as well as an increased 8-hydroxy-2′-deoxyguanosine level within spermatozoa. The data obtained indicate that increased DNA fragmentation and diminished semen quality in men can be the result of an imbalance in semen pro- and antioxidant components after COVID-19