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Wyświetlanie 1-15 z 442
Tytuł:
Analysis of the parameters of supercapacitors containing polypyrrole and its derivatives
Autorzy:
Gocki, M.
Nowak, A.J.
Karoń, K.
Powiązania:
https://bibliotekanauki.pl/articles/24200628.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
polymer supercapacitor
conductive polymers
cyclic voltammetry
chronopotentiometry
superkondensator polimerowy
polimery przewodzące
woltamperometria cykliczna
chronopotencjometria
Opis:
Purpose: Investigation of some parameters of energy storage devices (so-called supercapacitors) in which the structures of selected conductive polymers were implemented. Researchers were interested in the relationship between the parameters of the supercapacitor and the molecular structure of the conductive polymer used as the electrode material. Design/methodology/approach: The polypyrrole and its derivatives were produced by an electropolymerization process performed with cyclic voltammetry. During the research, polymer supercapacitors were created containing collectors made of ITO plates. Measurement of device parameters using cyclic voltammetry and chronopotentiometry. In addition, the devices use polymer electrolytes based on poly (methyl methacrylate) (PMMA). Findings: Devices containing polypyrrole have the best electrochemical parameters, while supercapacitors containing poly (phenylpyrrole) have the lowest parameters. This parameter is due to the high hindrance in the poly(phenylpyrrole) molecule in the form of an aromatic ring. Research limitations/implications: The most significant limitation of the devices is their durability due to the low strength of the conductive layer on ITO plates. This layer was easily degraded with too many test cycles. Practical implications: It was confirmed that polypyrrole and its derivatives could be used as electrode materials in energy storage devices. Originality/value: One of the few studies that allow the evaluation of the molecular structure of polypyrrole and its derivatives as electrode material in symmetrical supercapacitors.
Źródło:
Archives of Materials Science and Engineering; 2023, 120, 1; 5--14
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suspension fertilizers based on alternative raw materials : the key to sustainability and closed nutrient cycles
Autorzy:
Gorazda, Katarzyna
Kominko, Halyna
Nowak, Anna K.
Wiśniak, Adam
Powiązania:
https://bibliotekanauki.pl/articles/27311568.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
circular economy
alternative raw materials
suspensions
waste
fertilizer
nutrients recovery
Opis:
The rapid, high increase in production costs and prices of mineral fertilizers leads to a reduction in their use by farmers, while fertilizer manufacturers consider the use of alternative raw materials and reducing the energy consumption of fertilizer production processes. Given these circumstances, special attention is warranted for suspension fertilizers. The manufacturing of suspension fertilizers is simplified and less energy intensive in comparison with solid fertilizers. This is achieved by omitting certain production stages such as granulation, drying, sifting, which usually contribute to more than half of the production costs. This paper presents the production procedure of suspension fertilizers tailored for cabbage cultivation, utilizing alternative raw materials such as sewage sludge ash and poultry litter ash. The final products are thoroughly characterized. The obtained fertilizers were rich in main nutrients (ranging from 23.38% to 30.60% NPK) as along with secondary nutrients and micronutrients. Moreover, they adhere to the stipulated standards concerning heavy metal content as outlined in the European Fertilizer Regulation. A distribution analysis has showed that suspension fertilizers contain nutrients in both liquid and solid phases. This arrangement facilitates their easy availability for plants and subsequent release upon dissolution in soil conditions. To assess process consistency, the production of the most promising fertilizer was upscaled. A preliminary technological and economic analysis was also conducted. The method of producing suspension fertilizers using alternative raw materials is a simple waste management solution offering nutrient recycling with the principles of circular economy. This approach not only encourages nutrient recycling but also curtails reliance on imported raw materials.
Źródło:
Archives of Environmental Protection; 2023, 49, 3; 38--49
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the productive potential of agriculture and its efficient utilisation in Poland and Ukraine
Ocena potencjału produkcyjnego rolnictwa oraz efektywności jego wykorzystania w Polsce i na Ukrainie
Autorzy:
Nowak, A.
Kovaliv, V.
Rulitska, K.
Powiązania:
https://bibliotekanauki.pl/articles/13925464.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
agriculture
Polska
production potential
productivity
Ukraine
Źródło:
Agronomy Science; 2022, 77, 4; 23-32
2544-4476
2544-798X
Pojawia się w:
Agronomy Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of changes occurring in ALM models of banks in Poland after the outbreak of the COVID-19 pandemic
Ocena zmian zachodzących w modelach ALM banków w Polsce po wybuchu pandemii COVID-19
Autorzy:
Cichowicz, Ewa
Nowak, Agnieszka K.
Powiązania:
https://bibliotekanauki.pl/articles/2054055.pdf
Data publikacji:
2022-02-04
Wydawca:
Bankowy Fundusz Gwarancyjny
Tematy:
Low Interest Rate Environment
Interest Rate Risk
Asset and Liability Management (ALM)
środowisko niskich stóp procentowych
ryzyko stopy procentowej
zarządzanie aktywami i pasywami
Opis:
The purpose of this paper is to assess the changes in the models of balance sheet structure management in banks in Poland after the outbreak of the COVID-19 pandemic. The main focus is on the changes in the interest rate risk profile in the banking sector, resulting from the low interest rate environment and other reasons after the events of early 2020. The key element of the models, referred to as Asset and Liability Management (ALM) models, is the management of financial result and risk in the banking book (including liquidity and interest rate risk). Lately the large-scale materialization of liquidity risk occurred during the global financial crisis. Since then, the regulatory standards and the tools implementing them have been revised and properly supplemented. In turn, the post-pandemic changes triggered an increase in interest rate risk exposure. The deterioration of financial results, as well as the almost "forgotten" risks turned out to be as severe in their consequences for banks as credit, market or operational risks. This paper evaluates the impact of the change in interest rates after the outbreak of the Covid-19 pandemic on the performance and structure of balance sheets in banks in Poland in terms of adjustment strategies.
Celem artykułu jest ocena zmian w modelach zarządzania strukturą bilansu w bankach w Polsce po wybuchu pandemii COVID-19. Główny nacisk położony został na zmiany profilu ryzyka stóp procentowych w sektorze bankowym, wynikające ze środowiska niskich stóp procentowych oraz innych przyczyn po wydarzeniach z początku roku 2020. Kluczowym elementem modeli, określanych jako modele Asset and Liability Management (ALM), jest zarządzanie wynikiem finansowym oraz ryzykiem w księdze bankowej (w tym ryzykiem płynności i stopy procentowej). Ostatnio materializacja ryzyka płynności na dużą skalę miała miejsce w czasie globalnego kryzysu finansowego. Od tego czasu normy regulacyjne i narzędzia je wdrażające zostały zweryfikowane, a także odpowiednio uzupełnione. Z kolei zmiany zachodzące po wybuchu pandemii spowodowały także wzrost ekspozycji na ryzyko stopy procentowej. Pogorszenie wyników finansowych, podobnie jak „zapomniane” niemal ryzyko okazały się równie dotkliwe w skutkach dla banków, jak ryzyko kredytowe, rynkowe czy operacyjne. W artykule dokonano oceny wpływu zmiany stóp procentowych po wybuchu pandemii Covid-19 na wyniki i strukturę bilansów w bankach w Polsce w ujęciu strategii dostosowawczych.
Źródło:
Bezpieczny Bank; 2021, 85, 4; 76-96
1429-2939
Pojawia się w:
Bezpieczny Bank
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suspicion of bovine tuberculosis in sheep in the Małopolskie Voivodeship (southern Poland)
Autorzy:
Didkowska, A.
Żmuda, P.
Orłowska, B.
Nowak, M.
Filip-Hutsch, K.
Cuper, K.
Krajewska-Wędzina, M.
Anusz, K.
Powiązania:
https://bibliotekanauki.pl/articles/16539333.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
bovine tuberculosis
dairy products
IGRA
sheep
tuberculin skin test
Opis:
Bovine tuberculosis (BTB) in sheep (Ovis aries) is caused by Mycobacterium bovis and Mycobacterium caprae. Even though sheep have been considered less sensitive to BTB than other ruminants, they have been subject to increasing numbers of tuberculosis cases and it has been suggested that they may act as a disease reservoir in some regions. Aim of the study: Following a report of tuberculous-like gross lesions (repeated cases of purulent or caseous lymphadenitis and a single case of serosal tubercles on the peritoneum) from veterinarians working in a slaughterhouse in the Małopolskie Voivodeship, southern Poland, the aim of this study was to conduct ante-mortem BTB diagnostics in three flocks with suspected BTB. The animals for testing were selected randomly from the flocks; a blood sample for interferon-γ release assay (IGRA) and a single tuberculin skin test (TST) was performed on each sheep. All TST results were negative. The IGRA result was positive in two ewes from the same flock (four and five years of age); these two sheep were tested microbiologically using Stonebrink and Löwenstein-Jensen media. No gross lesions suggesting BTB were observed, and the culture results were negative. Based on the positive IGRA results, together with its high specificity in sheep, and the potential risk to humans posed by consuming local unpasteurized dairy products, we recommend introducing serological BTB screening in sheep from this area, and subjecting the positive results to confirmation by culture.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 3; 469-473
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial resistance of Escherichia coli and Klebsiella spp. conventionally sampled from factory-farmed chickens – clinical submissions
Autorzy:
Majewski, M.
Józefiak, A.
Kimsa-Furdzik, M.
Dziubdziela, L.
Hudak-Nowak, M.
Wilczyński, J.
Anusz, K.
Powiązania:
https://bibliotekanauki.pl/articles/28762783.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 271-276
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress at work as a health risk factor from the opinion of professionally active nurses
Stres w pracy jako czynnik zagrożenia zdrowia w opinii pielęgniarek i pielęgniarzy aktywnych zawodowo
Autorzy:
Dziewisz-Markowska, E.
Chmielewski, J.P.
Czerwiec, M.
Fiks, J.
Markowski, K.
Nowak-Starz, G.
Powiązania:
https://bibliotekanauki.pl/articles/2048064.pdf
Data publikacji:
2021
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
occupational stress
nurses
work
Opis:
Background. Medical workers, especially nurses, are susceptible to numerous stressful situations, due to the great demands which are a result of the specifics of working with an ill person. The aim of the study was to identify stress factors in nursing work, without taking into account the place of employment (i.e., wards). Material and methods. The study group was made up of a sample of 102 nurses, 15 male and 87 female. The diagnostic poll method and the interview technique were used, and a designed questionnaire was used as the research tool. During statistical analysis, a non-parametric χ2 test was used (p<0.05). Additionally, the strength of the examined relationships was determined (rp). Results. Work was the main source of stress (44.1%) for the participants. Of the nurses, 39.2% often felt stressed at work, whereas emotional tension was present in 25.5% of the participants constantly. Nearly half felt burdened by everyday tasks at work, while talking about the problem (55.9%) and physical activity (37.3%), including walks (19.6%), were the most frequently used forms of fighting stress. Significant relationships were found between the level of stress and the marital status and place of residence of the participants. Conclusions. Some nurses assessed the stress that accompanied them at work as being high and over half of them felt it was an average level of stress. Stress was the most often mentioned detriment-to-health factor in the opinions of the participants.
Źródło:
Health Problems of Civilization; 2021, 15, 3; 196-201
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of endoscopic tattooing in intraoperative localization of colon tumours and sentinel lymph nodes
Autorzy:
Nowak, N.
Dziedzic, J.
Nurczyk, K.
Zakoscielny, A.
Bury, P.
Zgodzinski, W.
Zinkiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/2097996.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
colorectal cancer
surgical treatment
endoscopy
endoscopic tatooing
non-invasive technique
Opis:
Introduction. Minimally invasive techniques in colorectal surgery have become increasingly popular and are considered a standard of care in most surgical cenres. Locating the tumour during laparoscopic procedure can be technically challenging. Incorrect localization of the primary lesion may lead to a non-radical resection margin. The technique of endoscopic tattooing (ET) prior to surgery or endoscopic treatment is considered a useful tool. Various dyes can be used for this purpose, such as: Indian ink, methylene blue, indigocarmine, toluidine blue, isosulfan blue, haematoxylin and eosin, indoxin green. This procedure is recommended by international scientific societies (ASGE and ESGE). Objective. The purpose of the study is to review the current literature on the use of ET in large intestine tumour lesions. Materials and method. A MEDLINE literature search of English language articles addressing the use of ET to enable intraoperative tumour localization in colorectal surgery was performed to evaluate and summarize the feasibility of this technique. Results. The use of ET enables the easy and safe localization of colorectal tumurs during minimally invasive colorectal procedures. The percentage of complications is insignificant. Conclusions. The available literature proves the safety and benefits of using the ET prior to surgical or endoscopic treatment. ASGE and ESGE recommend the use of ET in marking tumours before surgical treatment, and the area after endoscopic resection for further evaluation.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2020, 14, 4; 134-138
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Awareness of smoking in adolescents with inflammatory bowel disease
Autorzy:
Dziekiewicz, M.
Kowalska-Duplaga, K.
Baranowska-Nowak, M.
Nieścioruk, M.
Kuźniarski, S.
Banasiuk, M.
Banaszkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2085373.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
Crohn’s disease
ulcerative colitis
environmental factors
tobacco
Opis:
Introduction and objectives. Inflammatory bowel disease (IBD) is long life disease that results from an interaction between a polygenetic predisposition and environmental factors, including smoking. The aim of this study was to evaluate beliefs about and awareness of smoking among adolescents with IBD compared to healthy controls. Materials and method. Patients with IBD, Crohn’s disease (CD) and ulcerative colitis (UC), and healthy controls were asked to complete a questionnaire on demographic data and smoking status. The questionnaire also included data on beliefs and awareness of smoking-related health effects, including effects on IBD. Results. A total of 139 IBD patients and 108 controls were enrolled in the study. Of the IBD patients, 17/139 (12.2%) were smokers compared to 18/108 (16.7%) of controls (p=0.3). Patients with IBD were nine times more likely to be everyday smokers than occasional smokers (OR=9.2, 95% CI: 1.9- 45.1, p=0.004). No difference was found between patients with CD and UC in their answers to the question of whether “smoking increases the risk for surgery in your type of IBD” (17/28 (60.7%) vs. 10/29 (34.5%), respectively (p=0.047). More patients with CD than UC were aware of the risks of smoking on their disease: extra-intestinal manifestations and disease exacerbation, OR=11.3 (95% CI: 4.1 – 30.9; p=0.000) and OR=19.3 (95% CI: 6.7 – 55.1; p=0.000), respectively. Conclusions. The data obtained demonstrated that adolescents with CD are much more aware of the role of smoking on CD than are their peers with UC; however, this awareness is still unsatisfactory. Therefore, there is an unmet need to implement better anti-smoking strategies for this group of patients.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 61-65
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
COMPARISON OF ARTIFICIAL HYDROPHILIC AND LIPOPHILIC MEMBRANES AND HUMAN SKIN TO EVALUATE NIACINAMIDE PENETRATION IN VITRO
Autorzy:
Nowak, Anna
Church, Martin K.
Duchnik, Wiktoria
Różewicka-Czabańska, Monika
Bielecka-Grzela, Stanisława
Prowans, Piotr
Pietriczko, Jan
Czapla, Norbert
Bargiel, Piotr
Klimowicz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/895721.pdf
Data publikacji:
2020-04-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
penetration
Franz diffusion cell
Niacinamide (Vitamin B3)
artificial membrane
human skin
Opis:
The evaluation of skin penetration of active substances from topical preparations is a pre-clinical requirement in the pharmaceutical industry. While in vitro preparations of human or animal skin are frequently used the development of artificial lipophilic and hydrophilic membranes with similar properties to human or animal skin need to be developed. This preliminary study compared the in vitro permeation of niacinamide (vitamin B3), which is used as a model drug, across artificial hydrophilic and lipophilic membranes with iv vitro penetration across human skin. The experiments were carried out in Franz diffusion cells. Artificial membranes were filter paper impregnated with either collodium (hydrophilic), stearic acid, cetyl alcohol or cetyl alcohol + cholesterol (lipophilic). Acidic and neutral hydrogel and emulsion (pH 5.4 and 7.4) containing 0.5% of niacinamide were applied to membranes for up to 4 hours. Niacinamide permeated hydrophilic better than lipophilic membranes. There were no significant differences between the cumulated amounts of niacinamide that penetrated artificial lipophilic membranes consisting of, stearic acid, cetyl alcohol and cholesterol as compared with human skin in vitro. Also, hydrogel and emulsion solvents gave similar results. In conclusion, these artificial membranes seem to be a promising alternative to human or animal skin.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 271-279
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of Triticum durum genotypes showing increased tolerance to oxidative stress
Identyfikacja genotypów Triticum durum o zwiększonej tolerancyjności na stres oksydacyjny
Autorzy:
Leśniowska-Nowak, J.
Sozoniuk, M.
Kawęcka, M.
Maga, K.
Mrozek, M.
Powiązania:
https://bibliotekanauki.pl/articles/13098639.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
durum wheat
plant tolerance
Triticum durum
oxidative stress
methyl viologen
paraquat
Źródło:
Agronomy Science; 2020, 75, 1; 43-65
2544-4476
2544-798X
Pojawia się w:
Agronomy Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metastatic and non-metastatic sentinel inguinofemoral lymph nodes in vulvar cancer show an increased lymphangiogenesis
Autorzy:
Piechowicz, M.
Mikos, M.
Banas, T.
Okon, K.
Pietrus, M.
Balajewicz-Nowak, M.
Szczudlik, L.
Kojs, Z.
Czerw, A.
Juszczyk, G.
Pityński, K.
Powiązania:
https://bibliotekanauki.pl/articles/2085422.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
anti-D2–40 antibody
lymphatic vessel density
immunohistochemistry
sentinel lymph node
vulvar cancer
Opis:
Introduction and objective. Lymph node involvement is a strong predictor of disease recurrence and patient survival in vulvar cancer. The aim of the study was to evaluate the feasibility of sentinel lymph node (SLN) screening, the incidence of skip metastases, and lymph node lymphangiogenesis. Materials and method. Fifty-five patients participated in this prospective, single centre study. A double SLN screening method was employed using radiocolloid (technetium-99 sulfur colloid) and 1.0% Isosulfan Blue. Immunohistochemistry, using a mouse monoclonal antibody against D2–40, was used to evaluate lymphatic vessel density (LVD). All calculations were performed using STATISTICA software v. 10 (StatSoft, USA, 2011); p<0.05 was considered significant. Results. Using both methods of SLN detection, 100% accuracy was achieved, and skip metastases were diagnosed in only one woman (1.82%). Peri-tumour median LVD was significantly increased compared with matched intra-tumour samples (p<0.001), while median LVD was significantly lower in negative, compared with positive SLN, regardless of whether matched non-SLN were negative (p<0.001) or positive (p=0.005). Metastatic SLN exhibited significantly higher median LVD compared with matched negative non-SLN (p=0.015), while no significant difference in median LVD was detected between positive SLN and matched positive non-SLN. However, negative SLN had a significantly higher median LVD compared with matched negative non-SLN (p = 0.012). Conclusions. SLN detection is a safe and feasible procedure in vulvar cancer. In patients without nodular involvement, SLN, compared with non-SLN, exhibited significantly higher median LVD, which may be an indication of its preparation to host metastases, and thus requires further investigation.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 123-128
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena zasiedlenia sztucznych schronień przez popielicowate (Gliridae) w karpackich lasach
Assessing the occupation of nest boxes by dormice (Gliridae) in the Carpathian forest
Autorzy:
Fedyn, I.
Pierzchala, E.
Nowak, K.
Was, J.
Malak, A.
Snigorska, K.
Powiązania:
https://bibliotekanauki.pl/articles/2142723.pdf
Data publikacji:
2020
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
dormice
nest boxes
rodents
conservation
forest mammals
Gliridae
skrzynki dla popielicowatych
gryzonie
ochrona czynna
Opis:
Nest boxes for dormice (Gliridae) can significantly increase the habitat’s carrying capacity for these species in areas under high anthropopressure and facilitate the long-term monitoring of populations. As part of the active protection of dormice in the Carpathian Landscape Parks in Małopolska, in August and September 2019, 575 boxes of two different sizes were checked for the presence of adults, young or nests. Additionally, habitat conditions within a 25 m radius were recorded (e.g. forest stand, estimated understory cover, the approximate number of natural shelters, fruiting plant species). The vast majority of all nest boxes – 79% – were used by dormice, but also birds and insects frequently occupied these shelters. Out of four species of dormice that occur in Poland, two were recorded in the study area: hazel dormice Muscardinus avellanarius and fat dormice Glis glis. They were found in all surveyed landscape parks and inhabited mainly fir stands. Hazel dormice preferred smaller nest boxes and were generally more common than fat dormice, which preferred large boxes. On the other hand, fat dormice were more common in areas rich in fruiting plant species. Our research thus confirmed the usefulness of artificial shelters for dormouse in active protection
Źródło:
Leśne Prace Badawcze; 2020, 81, 2; 75-80
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatność oznaczania wskaźnika kwaśnego steatokrytu u niemowląt chorych na mukowiscydozę
The applicability of acid steatocrit in cystic fibrosis infants
Autorzy:
Filipiak-Wieczorek, Mirosława
Drzymała-Czyż, Sławomira
Walkowiak, Dariusz
Nowak, Jan K.
Woźniak, Dagmara
Walkowiak, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/762679.pdf
Data publikacji:
2020-04-27
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
stężenie tłuszczu w stolcu
wydalanie tłuszczu
suplementacja enzymatyczna
niewydolność zewnątrzwydzielnicza trzustki
faecal fat concentration
faecal fat excretion
enzymatic supplementation
exocrine pancreatic function
Opis:
Background: Steatorrhea, which is a consequence of pancreatic insufficiency, occurs in 85% of patients with cystic fibrosis. In clinical practice, fecal fat concentration is used to diagnose and monitor fecal fat losses. Because compliance with this method is insufficient, new tests are needed. One of the alternatives may be the acid steatocrit. Aim: This study aimed to investigate the value of acid steatocrit in the assessment of fecal fat excretion in pancreatic-insufficient infants with cystic fibrosis: before and after the initiation of pancreatic enzyme supplementation. Patients and methods: The study included 10 infants with cystic fibrosis diagnosed through the newborn screening program and 16 healthy control infants. In all the children, fecal elastase-1, fecal fat concentration (%) and acid steatocrit were measured. Results: Fecal fat concentration in cystic fibrosis infants (range: 14.5%–32,1%) was significantly higher (p<0.0001) compared with control subjects (1.7%–15.1%). Acid steatocrit in cystic fibrosis (19.8%–68.7%) was also greater (p<0.0001) than in the control group (10.7%–22.7%). The area under the receiver operating characteristic curve (ROC) for the 95th percentile of normal values was 0.981 (95% confidence interval: 0.941–1.0) indicating high diagnostic accuracy of acid steatocrit. When acid steatocrit and fecal fat concentration cut-offs were set at 90th and 95th percentile for healthy infants, the specificity of acid steatocrit in detecting elevated fecal fat concentration was 100%, and the sensitivity 80% and 100%, respectively. Conclusions: Compared with the assessment of fecal fat concentration, sensitivity/specificity of acid steatocrit in steatorrhea detection in infants are potentially lower, but still satisfactory. The measurement of acid steatocrit may constitute a useful method of fecal fat concentration assessment in infants identified by the newborn screening program in whom the replacement enzyme therapy has not yet been commenced.
Przedmiot badań: U 85% pacjentów z mukowiscydozą (ang.: cystic fibrosis, CF) stwierdza się niewydolności zewnątrzwydzielniczej trzustki (nzt). Złotym standardem rozpoznawania biegunki tłuszczowej jest ocena stężenia tłuszczu w stolcu. Ze względu na małą akceptowalność tej metody szuka się nowych procedur. Alternatywę może stanowić pomiar wskaźnika kwaśnego steatokrytu (KS). Cel badań: Celem badania była ocena przydatności oznaczania KS w ocenie wydalania tłuszczu w stolcu u niemowląt z CF z nzt, przed włączeniem suplementacji enzymatycznej. Materiał i metody: Do badania włączono 10 niemowląt z CF wykrytą w przesiewie noworodkowym oraz 16 zdrowych niemowląt. U wszystkich dzieci wykonano oznaczenie stężenia elastazy-1 w kale, stężenia tłuszczu (%) w kale w oparciu o metodę Van de Kamera oraz wartości wskaźnika KS. Wyniki: Stężenie tłuszczu w stolcu dzieci z CF wynosiło od 14,5% do 32,1% i było statystycznie większe (p<0,0001) niż w grupie zdrowych niemowląt, w której wynosiło od 1,7% do 15,1%. Wartość wskaźnika KS w grupie badanej mieściła się w zakresie od 19,8% do 68,7% i również była większa niż w grupie kontrolnej (p<0,0001), w której wynosiła od 10,7% do 22,7%. Nie wykazano korelacji między wskaźnikiem KS a stężeniem tłuszczu w stolcu. Pole pod krzywą ROC dla wartości 95 percentyla wartości prawidłowych wynosiło 0,981 (95% przedział ufności: 0,941-1,0) odzwierciedlając dużą wartość diagnostyczną metody oznaczania KS. Wnioski: Pomiar wskaźnika KS dobrze różnicuje grupy niemowląt zdrowych oraz niemowląt chorych na CF z nzt. W porównaniu do metody Van de Kamera, czułość/swoistość oznaczania KS w wykrywaniu biegunki tłuszczowej u niemowląt, jest potencjalnie mniejsza, ale wciąż bardzo zadowalająca. Należy podkreślić prostotę oznaczania KS i możliwość uzyskania wyniku danego dnia. To sprawia, że oznaczenie KS może być przydatną metodą oceny stężenia tłuszczu w stolcu u niemowląt ze skryningu noworodkowego, u których nie włączono jeszcze suplementacji enzymatycznej.
Źródło:
Farmacja Polska; 2020, 76, 3; 156-152
0014-8261
2544-8552
Pojawia się w:
Farmacja Polska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Speed running is determined by strength and power in young football players
Szybkość biegu młodych piłkarzy jest determinowana ich siłą i mocą
Autorzy:
Kuczek, Piotr
Nowak, Beata K.
Powiązania:
https://bibliotekanauki.pl/articles/1032105.pdf
Data publikacji:
2020
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
running speed
strength
power
young player
szybkość biegu
siła moc
młodzi piłkarze
Opis:
Introduction: For years researchers and trainers have been looking for determinants of sports talent in the youngest and also in the relationship between individual motor features relevant in given sport disciplines. There is a fundamental consensus in the opinion that the strength and power of the lower limbs are correlated with the speed of running. However, this relationship also among the youngest is not so clear. The purpose of the work was to show the relationship between strength and power generated during vertical jump and achieved height jump and the speed of flat running in the youngest footballers. Material and methods: The research covered 75 children training football at the age of 6-14 years divided into two age groups. The subjects made a countermovement jump on a dynamometric platform measuring strength, power, speed of rebound and the height obtained, after which they performed a flying run over a distance of 20m. Results: A strong, positive correlation was demonstrated between all dynamic and kinetic parameters of the jump and running speed. This correlation turned out to be clearly stronger in the older group of football players than in the younger group. Conclusions: The obtained results suggest that strength and power are good predictors, such an important feature in football as the player's motion speed, already at the basic level of training.
Wprowadzenie: Od lat badacze i trenerzy szukają determinantów talentu sportowego u najmłodszych a także związku między poszczególnymi cechami motorycznymi, istotnymi w danych dyscyplinach sportowych. Istnieje fundamentalna zgoda w opinii, że siła i moc kończyn dolnych są skorelowane z prędkością biegu. Czy jednak korelacja ta występuje również u najmłodszych nie jest już tak jasne. Celem pracy jest wykazanie zależności pomiędzy siłą, mocą generowaną podczas wyskoku pionowego i osiągniętej wysokości a szybkością biegu płaskiego u najmłodszych piłkarzy nożnych. Materiał i metody: Badaniami objęto 75 dzieci trenujących piłkę nożną w wieku 6-14 lat, podzielonych na dwie grupy wiekowe. Badani wykonali skok dosiężny na platformie dynamometrycznej, z pomiarem siły, mocy, prędkości odbicia i uzyskanej wysokości, po czym wykonali bieg lotny na dystansie 20 m. Wyniki: Wykazano silną, dodatnią korelację między wszystkimi parametrami dynamicznymi i kinetycznymi skoku i prędkości biegu. Korelacja ta okazała się wyraźnie silniejsza w starszej grupie piłkarzy niż w młodszej grupie. Wnioski: Uzyskane wyniki sugerują, że siła i moc są dobrymi predyktorami ważnej w piłce nożnej cechy, jaką jest prędkość ruchu zawodnika, już na podstawowym poziomie treningu.
Źródło:
Health Promotion & Physical Activity; 2020, 10, 1; 23-27
2544-9117
Pojawia się w:
Health Promotion & Physical Activity
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 442

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