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Wyświetlanie 1-5 z 5
Tytuł:
Vitamin D in the skin physiology and pathology
Autorzy:
Piotrowska, Anna
Wierzbicka, Justyna
Żmijewski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1038837.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
vitamin D
cancer
skin
keratinocytes
vitamin D analogues
Opis:
Vitamin D plays important, pleiotropic role in the maintenance of global homeostasis. Its influence goes far beyond the regulation of calcium and phosphorus balance, as diverse activities of vitamin D and its natural metabolites assure proper functioning of major human organs, including skin. Recently, we reviewed the current understanding of vitamin D impact on human health from historical perspective (Wierzbicka et al. (2014) The renaissance of vitamin D. Acta Biochim Pol 61: 679-686). This article focuses on its functions in the skin. The skin and its appendages, creates a platform connecting and protecting internal organs against, usually harmful, external environment. It uppermost layer - epidermis in order to maintain a protective barrier undergoes a constant exchange of cornified keratinocytes layer. Its disturbance leads to development of serious skin disorders including psoriasis, vitiligo, atopic dermatitis and skin cancer. All of those dermatopathologies have a huge impact on modern societies, affecting not only the physical, but also mental state of patients as well as their social status. Furthermore, multiple human systemic diseases (autoimmune, blood and digestive diseases) have skin manifestation, thus "condition of the skin" often reflects the condition and pathological changes within the internal organs. In humans, the skin is the natural source of vitamin D, which is produced locally from 7-dehydrocholesterol in photoreaction induced by ultraviolet B (UVB) radiation from the sun. It is also well established, that the process of proliferation and differentiation of keratinocytes is tightly regulated by calcium and the active form of vitamin D (1,25(OH)2D3). Thus, the skin physiology is inseparably connected with vitamin D production and activity. Unfortunately, UVB, which is required for vitamin D production, is also known as the main cause of a skin cancer, including melanoma. Here, we are going to review benefits of vitamin D and its analogues in the maintenance of epidermal barrier and its potential use in the treatment of common skin diseases.
Źródło:
Acta Biochimica Polonica; 2016, 63, 1; 17-29
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The renaissance of vitamin D
Autorzy:
Wierzbicka, Justyna
Piotrowska, Anna
Żmijewski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1039195.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
vitamin D
skin
vitamin D deficiency
vitamin D supplementation
vitamin D analogs
Opis:
There is no doubt that vitamin D plays a crucial role in the maintenance of musculoskeletal system. But the function of this ancient molecule presumably ranges far beyond hormone-like regulation, as it could be generated by simple unicellular organisms. First, we are going to discuss the role of vitamin D as a global regulator of homeostasis from a historical perspective, but later we will focus on current views and its relevance to human physiology and pathology. Three milestones are defining the impact of vitamin D on science and humanity. Firstly, discovery that vitamin D is the cure for rickets, brought us supplementation programs and rapid irradiation of this devastating disease. Secondly, detail description of photoproduction of vitamin D, its subsequent metabolism and interaction with vitamin D receptor VDR, provided mechanistic background for future discoveries. Finally, recent large epidemiological studies provided indirect, but strong evidence that optimal level of vitamin D in serum has beneficial effects on our health and protects us from multiple diseases, including cancer. Furthermore, existence of alternative pathways of vitamin D metabolism and multiple intracellular targets broadens our understanding of its physiological activities and offers new and very promising tools for prophylactics and treatment of many diseases of civilization. Although vitamin D (and its derivatives) should not be regarded as a cure-all for every human disease, its beneficial effects on the human health have to be taken under consideration.
Źródło:
Acta Biochimica Polonica; 2014, 61, 4; 679-686
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental research on the thermal properties of innovative insulation boards made of polyurethane-polyisocyanurate (PUR/PIR)
Autorzy:
Prałat, Karol
Ciemnicka, Justyna
Jankowski, Piotr
Wierzbicka, Ewa
Plis, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/2204141.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
polyisocyanurate
PIR
polyurethane
PUR
thermal properties
insulating buildings materials
aerogels
Opis:
In this work, the results of investigations of polyurethane materials were presented. Innovative materials based on polyurethane-polyisocyanurate (PUR/PIR) foam were obtained. Different types of additives (flame retardants, aerogels – additives that decrease thermal conductivity) are used in the composition of PUR/PIR foam. Foams are a type of composite composed of two phases: continuous (polyurethane polymers) and dispersed (composed of gases). All samples have been tested for thermal parameters: thermal conductivity, specific heat, and thermal diffusivity. Then they have been compared with each other and with a reference sample (RS) without additives. Based on the research, it was shown that innovative insulation materials were characterized by thermal conductivity λ in the range of 0.0254–0.0294 W/(m · K). The thermal properties of foams depending on the type and chemical composition of the material. Depending on the used substrates, their molar ratio, type, synthesis conditions, modifying agents and catalysts, a different polyurethane material is obtained.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 1; 40--46
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Early Results of a Loop Stoma with a Plastic Rod in Comparison to a Loop Stoma Made with a Skin Bridge
Autorzy:
Dziki, Łukasz
Mik, Michł
Trzciński, Radzisław
Buczyński, Jarosław
Darnikowska, Justyna
Spychalski, Michał
Wierzbicka, Anna
Dziki, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1395192.pdf
Data publikacji:
2015-03-01
Wydawca:
Index Copernicus International
Tematy:
ileostomy
complications
skin patch
rectal cancer
Opis:
Loop stoma allows reducing the percentage of anastomotic leak and re-operation caused by this complication. Our department has performed the loop stoma on a skin bridge since 2011. The aim of the study was to evaluate the early results of treatment after the skin bridge loop stoma creation in comparison with the stoma made on a plastic rod. Both groups had 20 patients. Material and methods. The study involved 40 patients with ileostomy, operated 2010-2013. We evaluated 20 patients with a loop ileostomy on a plastic rod, compared to 20 other patients with a skin bridge ileostomy. The study included 24 men and 16 women. Median age was 68.3. All evaluated patients were previously operated due to rectal cancer. Results. It has been shown that the surgical site infection is more common in the group with a plastic rod (5 vs 1 patient). Inflammation of the skin around the stoma occurred in 18 patients (90%) in the first group, while no such complication was found in patients in the second group. The average number of exchanged ostomy wafers was 2,9 per week in the first group of patients, and 1,1 in the second group (p 0,05). Conclusions. The creation of the skin bridge stoma allows for tight fit of the ostomy appliance immediately after surgery completion. The equipment has stable and long-lasting contact with the skin, no skin inflammatory changes occur. Also the surgical site infection rates are lower in this group of patients. As perioperative patient does not require an increased number of ostomy appliance, the cost of treatment can be considered as an important aspect.
Źródło:
Polish Journal of Surgery; 2015, 87, 1; 31-34
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spożycie surowego mleka wśród mieszkańców województwa łódzkiego oraz zagrożenia zdrowotne z tym związane
Consumption of raw milk among the inhabitants of the Łódź voivodeship and related health risks
Autorzy:
Matusiak, Dominik Maciej
Filiks, Justyna
Jończyk, Edyta
Komisarek, Nadia
Chotecka, Olga
Sitarska, Daria
Wierzbicka, Agnieszka
Tokarczyk, Agnieszka
Buchajczyk, Aneta
Stefaniak, Aleksandra
Rudzińska, Justyna
Kruszelnicka, Monika
Pardel, Natalia
Mnich, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/1891438.pdf
Data publikacji:
2021-10-10
Wydawca:
Stowarzyszenie Młodych Naukowców
Tematy:
surowe mleko
drobnoustroje chorobotwórcze/patogeny
województwo łódzkie
zoonozy
raw milk
pathogenic microorganisms/pathogens
Łódź voivodeship
zoonoses
Opis:
Produkty mleczne stanowią istotny składnik diety człowieka. Spożycie mleka nie poddanego obróbce termicznej lub mikrofiltracji, nie badanego pod kątem mikrobiologicznym i toksykologicznym, może być przyczyną chorób zakaźnych lub zatruć. Infekcje te powodowane są przez bakterie, pierwotniaki i wirusy. Zatrucia natomiast przez toksyny bakteryjne lub pleśni. Zanieczyszczenia mikrobiologiczne mleka mogą pochodzić od zwierząt, ludzi, środowiska, aparatury przemysłowej.. Celem badania było poznanie skali zjawiska spożycia surowego mleka przez mieszkańców woj. łódzkiego oraz ogólna charakterystyka osób spożywających surowe mleko. W badaniu posłużono się metodą ankietową. Kwestionariusz ankiety był udostępniany respondentom w formie papierowej, jak i elektronicznej. Odpowiedzi na pytania pozyskiwano bezpośrednio oraz z wykorzystaniem formularza elektronicznego. Zebrano odpowiedzi od 777 ankietowanych. 19,4% respondentów udzieliło informacji, że spożywało surowe mleko w 2020 r. W tej grupie najliczniejsze były kobiety (62,3%) oraz osoby w wieku 20-29 lat (25,8%) i 40-49 lat (23,2%). 43% respondentów deklarowało posiadanie wykształcenia średniego, a 39,7% wyższego. 80,1% ankietowanych mieszkało w miastach. 75,5% ankietowanych stwierdziło, że spożycie surowego mleka nie stanowi zagrożenia dla zdrowia człowieka. Uzyskane wyniki badań wskazują na niewystarczający poziom wiedzy mieszkańców woj. łódzkiego odnośnie niebezpieczeństw związanych ze spożyciem surowego mleka. W związku z tym uzasadnione byłoby przeprowadzenie kampanii społecznych informujących o tym zagrożeniu.
Dairy products are an important component of the human diet. Consumption of milk that has not undergone heat treatment or microfiltration, has not been tested in terms of microbiological and toxicological contamination, may cause infections or poisonings. These infections are caused by bacteria, protozoa and viruses. Whereas poisonings are caused by bacterial or mold toxins. Microbiological contamination of milk may come from animals, humans, the environment, and industrial equipment. The aim of the study was to find out the scale of the consumption of raw milk by the inhabitants of the Lodz Voivodeship and general characteristics of consumers of such milk. The survey method was used. Answers to the questions were obtained directly and using an electronic form. 777 surveys were collected. 19.4% of respondents consumed raw milk in 2020. In this group, the most numerous were women (62.3%) and people in age 20-29 (25.8%) and 40-49 (23.2%). 43% of respondents declared having secondary education, and 39.7% having higher education. 80.1% of the respondents lived in cities. 75.5% of respondents stated that consumption of raw milk does not pose a threat to human health. The obtained research results indicate an insufficient level of knowledge of the inhabitants of the Lodz Voivodeship regarding the dangers of raw milk consumption. Therefore, it would be justified to conduct social campaigns informing about this threat.
Źródło:
Nauki Przyrodnicze i Medyczne; 2021, 32, 2; 28-36
2353-1371
Pojawia się w:
Nauki Przyrodnicze i Medyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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