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Wyszukujesz frazę "activity index" wg kryterium: Temat


Tytuł:
An assessment of the influence of selected factors on the activity of cement-slag binders
Ocena wpływu wybranych czynników na aktywność spoiw cementowo-żużlowych
Autorzy:
Janic, Arkadiusz
Giergiczny, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/27314631.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
granulated blast furnace slag
activity index
grinding degree
blast furnace cement
granulowany żużel wielkopiecowy
wskaźnik aktywności
stopień rozdrobnienia
cement hutniczy
Opis:
The article analyzes the influence of selected factors on the activity rate of cement binder containing 50% of ground granulated blast furnace slag in its composition. These factors are the chemical and mineral composition of Portland cement CEM I, the degree of grinding of granulated blast furnace slag and Portland cement, and the water/binder ratio. This slag content is characteristic for blast furnace cement CEM III/A. In addition to the application effects, this type of cement is a low-carbon binder (there is a reduction of CO2 emissions by about 45% compared to Portland cement CEM I). The use of this type of cement in the composition of concrete enables the obtaining of concrete with a very small carbon footprint. Based on the results of our own research, it was found that such a high proportion of ground granulated blast furnace slag in the binder composition leads to a significant reduction in the early compressive strength of standard mortars (after two and seven days of setting). This results in a significant reduction in the use of these types of binders (cements) in selected areas of construction, e.g. prefabrication and high-strength concrete. Analyzing the obtained results of their own research, the authors concluded that the early strength of these types of binders can be significantly improved by increasing the specific surface area (degree of grinding) of Portland cement CEM I and lowering the water/slag ratio (w/s, where: s = cement + slag). The proposed material and technological modifications also enable the obtaining of higher compressive strength at all tested dates. The strength of the standard (after twenty-eight days and over longer periods) is comparable to or higher than that of Portland cement CEM I.
W artykule przeanalizowano wpływ wybranych czynników: składu chemicznego i mineralnego cementu portlandzkiego CEM I, stopnia przemiału granulowanego żużla wielkopiecowego i cementu portlandzkiego oraz stosunku woda/spoiwo na kształtowanie się wskaźnika aktywności spoiwa cementowo-żużlowego zawierającego w swoim składzie 50% zmielonego granulowanego żużla wielkopiecowego. Taka zawartość żużla jest charakterystyczna dla cementu hutniczego CEM III/A. Oprócz efektów aplikacyjnych, ten rodzaj cementu jest spoiwem niskoemisyjnym (redukcja emisyjności CO2 o około 45% w stosunku do cementu portlandzkiego CEM I). Stosowanie tego rodzaju cementu w składzie betonu pozwala na uzyskanie betonu o bardzo małym śladzie węglowym. Na podstawie wyników badań własnych stwierdzono, iż tak wysoki udział zmielonego granulowanego żużla wielkopiecowego w składzie spoiwa prowadzi do znaczącego obniżenia wytrzymałości na ściskanie wczesnej (po 2 i 7 dniach dojrzewania) zapraw normowych. Skutkuje to znaczącym ograniczeniem stosowaniem tego rodzaju spoiw (cementów) w wybranych obszarach budownictwa, np. prefabrykacji i betonach wysokich wytrzymałości. Analizując uzyskane wyniki badań własnych autorzy doszli do wniosku, że wytrzymałość wczesną tego rodzaju spoiw można znacząco polepszyć poprzez zwiększenie powierzchni właściwej (stopnia przemiału) cementu portlandzkiego CEM I i obniżenie stosunku woda/spoiwo (w/s, gdzie: s = cement + żużel). Zaproponowane modyfikacje materiałowo-technologiczne pozwalają także na uzyskanie wyższych wytrzymałości na ściskanie we wszystkich badanych terminach. Wytrzymałość normowa (po 28 dniach) i w dłuższych terminach jest porównywalna lub wyższa niż cementu portlandzkiego CEM I.
Źródło:
Gospodarka Surowcami Mineralnymi; 2023, 39, 4; 181--196
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of selection process of constituent materials for high performance concrete and mortars
Optymalizacja procesu wyboru materiałów składowych do betonu i zapraw wysokowartościowych
Autorzy:
Lushnikova, N
Powiązania:
https://bibliotekanauki.pl/articles/390799.pdf
Data publikacji:
2015
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
high performance concrete
mortar
chemical admixture
mineral admixture
superplasticizer
metakaolin
activity index
beton wysokowartościowy
zaprawa
domieszki chemiczne
domieszki mineralne
superplastyfikator
wskaźnik aktywności
Opis:
The paper gives coverage on approach to the optimization of selection process of constituents for high performance concrete (HPC) and mortars. There is shown the example selection of cement, mineral and chemical admixtures, as the most costly and influential on concrete, from the point of their maximum efficiency, measured by flowability and compressive strength increasing indexes. Method combines models for determination of activity indexes with simple stochastic equations obtained at mathematical treatment of experimental results.
W artykule przedstawiono sprawozdanie na temat podejścia do optymalizacji procesu selekcji składników do betonu wysokowartościowego (BWW) oraz zapraw. Pokazany jest wybrany przykład stosunku cementu, minerałów i chemicznych domieszki, jako najbardziej kosztownych i wpływowych na beton, od punktu maksymalnej aktywności, mierzonej przez wzrostem indeksów zdolności do płynięcia i do wytrzymałości na ściskanie. Metoda łączy w sobie modele do oznaczania aktywności indeksów z prostymi równaniami stochastycznymi uzyskanymi przy obliczeniu wyników eksperymentalnych.
Źródło:
Budownictwo i Architektura; 2015, 14, 1; 53-64
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PHYSICAL ACTIVITY, HEALTH CONDITION AND LIFESTYLE OF ACADEMIC YOUTH
Autorzy:
Jakubowska, Luba
Grabowska, Barbara
Seń, Mariola
Powiązania:
https://bibliotekanauki.pl/articles/628136.pdf
Data publikacji:
2019
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Physical activity, lifestyle, health status, body mass index (BMI), academic youth.
Opis:
Introduction: Living in the age of modern inventions one forgets about one of the best medications for many health problems, which is physical activity. In 2016, Kantar Public (Ministry of Sport and Tourism, 2016) announced that only one in five Poles aged 15-69 had an adequate level of physical activity. A CBOS (Centre for Public Opinion Research) survey conducted in 2014 showed that half of Poles weigh too much. For the development of lifestyle diseases, besides overweight, the wrong lifestyle also contributes (CBOS No. 122/2014). According to the WOBASZ (a multi-center nationwide survey of the health status of the population) survey, only 3% of Polish society is characterized by "an indicator of a healthy lifestyle" (Kwaśniewska, Kaczmarczyk-Chałas, Dziankowska-Zaborszczyk, Kucharczyk, Drygas, 2010). The role and task of physical activity at an early age, as well as at any other stage of life, is very important in the prevention of civilization diseases, which is why it is crucial to monitor it. Aim of the study: The aim of the study was to assess the relationship between the level of physical activity, state of health and the lifestyle of the academic youth. Material and methods: The research was carried out among students from three universities in Wrocław (n = 629): University of Wrocław (UWr), Wrocław University of Science and Technology (PWr) and Wrocław Medical University (UM). The study used self-constructed questionnaires: physical activity questionnaire, health questionnaire, lifestyle questionnaire. The following statistical analyzes of the results were used: Shapiro-Wilk test, Pearson chi-square test independence, post-hoc test, analysis of variance (ANOVA), correlation coefficient rank (Spearman) and Pearson's correlation coefficient. In the calculations, the package of computer programs STATISTICA v. 9.0 was used. Hypotheses verified at the level of p ≤0.05. Results: Health was the highest-rated one of the studied factors. In addition, it was found that as much as 67.7% of students from all universities represent a very good level of lifestyle. 68.4% of the respondents were characterized by a very good health potential. Research has shown that the physical activity of students from Medical University is at a higher level than students of PWr and UWr. Among the demographic variables, gender turned out to be important (men perform physical activity more often than women, while BMI and place of origin did not affect the physical activity of students). Studies have confirmed the relationship between all major variables (physical activity, lifestyle and health). The increase in the level of physical activity is accompanied by an increase in the level of lifestyle. A positive correlation between lifestyle factor and health condition was also observed.
Źródło:
Journal of Education Culture and Society; 2019, 10, 2; 201-215
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activity of dehydrogenases, catalase and urease in copper polluted soil
Aktywnosc dehydrogenaz, katalazy i ureazy w glebach zanieczyszczonych miedzia
Autorzy:
Wyszkowska, J
Kucharski, M.
Kucharski, J.
Borowik, A.
Powiązania:
https://bibliotekanauki.pl/articles/15737.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
soil pollution
copper
enzyme activity
tolerance index
vulnerability index
dehydrogenase
catalase
urease
Opis:
Copper is a life essential element. However, in excess it can be destructive to metabolism of microbial, plant, animal and human cells. Thus, an understanding of all conditions associated with the effect produced by copper on natural environment is vital. The purpose of the present study has been to evaluate the effect of soil contamination with copper on the activity of dehydrogenases, catalase and urease as well as to determine the tolerance of these enzymes to excessive amounts of copper in soil. The variable factors of the experiment consisted of: 1) soil type: loamy sand and sandy loam; 2) copper pollution rate in mg kg-1 d.m. of soil: 0, 150, 450; 3) soil use: unseeded and seeded soil; 4) crop species: barley, spring oilseed rape and yellow lupine; 5) dates of enzymatic analyses: 25 and 50 day. The results have revealed that copper pollution, within the rates of 150 to 450 mg kg-1 d.m. of soil, significantly inhibits the activity of dehydrogeanses, urease and catalase, with catalase being the most tolerant to excessive copper, unlike dehydrogeneases, which were the most sensitive enzymes. Urease was found to be intermediate in the response to copper. Dehydrogenases, urease and catalase are the least tolerant to the inhibitory effect of copper in soil under spring oilseed rape, being the most tolerant to the pollution in soil under oats. Copper produces stronger inhibitory effect on soil enzymes in unseeded than in seeded soil. The negative effect of excess copper in soil persists and, instead of diminishing, the longer copper remains in soil, the stronger effect it yields. Dehydrognases and catalase are less tolerant to copper in sandy loam than in loamy sand, unlike urease, which was more tolerant to the pollutant in loamy sand than in sandy loam. Tolerance of plants to soil contamination with copper is a species-specific trait. Among the tested crops, yellow lupine was the least tolerant whereas spring oilseed rape was the most tolerant to copper contamination.
Miedź jest pierwiastkiem niezbędnym do prawidłowego funkcjonowania wszystkich organizmów, jednakże jej nadmiar w środowisku może działać destrukcyjnie na metabolizm komórek drobnoustrojów, roślin i zwierząt oraz ludzi. Zatem poznanie wszystkich uwarunkowań oddziaływania miedzi na środowisko przyrodnicze jest ze wszech miar uzasadnione. Celem badań było określenie wpływu zanieczyszczenia gleby miedzią na aktywność dehydrogenaz, katalazy i ureazy oraz określenie oporności tych enzymów na nadmiar miedzi w glebie. W doświadczeniu czynnikami zmiennymi były: 1) gatunek gleby: piasek gliniasty i glina piaszczysta; 2) stopień zanieczyszczenia miedzią w mg⋅kg-1 s.m. gleby: 0, 150 , 450; 3) sposób użytkowania gleby: gleba nieobsiana i obsiana roślinami; 4) gatunek uprawianej rośliny: owies, rzepak jary i łubin żółty; 5) termin analiz enzymatycznych: 25. dzień i 50. dzień. W wyniku badań stwierdzono, że zanieczyszczenie miedzią, w zakresie od 150 mg do 450 mg·kg-1 gleby, hamuje istotnie aktywność dehydrogenaz, ureazy i katalazy. Przy czym najbardziej odporna na nadmiar miedzi jest katalaza, a najmniej dehydrogenazy. Pośrednie miejsce zajmuje ureaza. Dehydrogenazy, ureaza i katalaza są najbardziej oporne na inhibicyjne działanie miedzi w glebie pod uprawą rzepaku jarego, a najmniej pod uprawą owsa. Miedź silniej hamuje aktywność enzymów w glebie nieobsianej roślinami niż w glebie obsianej. Negatywne działanie nadmiaru tego pierwiastka w glebie ma charakter trwały i zamiast ustępować nasila się wraz z czasem jego zalegania w glebie. Dehydrogenazy i katalaza są bardziej oporne na działanie miedzi w glinie piaszczystej niż w piasku gliniastym, a ureaza odwrotnie – bardziej oporna w piasku gliniastym niż w glinie piaszczystej. Wrażliwość roślin na zanieczyszczenie miedzią jest cechą gatunkową. Spośród badanych roślin najbardziej wrażliwy jest łubin żółty, a najmniej rzepak jary.
Źródło:
Journal of Elementology; 2009, 14, 3; 605-617
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical activity parameters and Body Mass Index among Public Secondary School Teachers, Oyo State. Nigeria
Autorzy:
Fabunmi, Ayodeji A.
Oyedokun, Barakat O.
Omole, John O.
Powiązania:
https://bibliotekanauki.pl/articles/1032099.pdf
Data publikacji:
2019
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
"Body mass index"; "school teachers"
"Physical activity parameters"
Opis:
Introduction: Physical inactivity is an important contributor to obesity epidemic. In Nigeria, public secondary school teachers are prone to sedentary lifestyle. This study determined physical activity parameters and Body mass index (BMI) among public secondary school teachers in Ibadan North Local Government Area of Oyo State. It also compared physical activity parameters and BMI between male and female teachers. Materials and methods: This study is a cross sectional survey and 101 (65 females and 36 males) public secondary school teachers participated. Physical activity parameters (number of steps, distance covered and energy expenditure) were assessed using pedometer while the Body Mass Index (BMI) was computed from participant’s height and weight. Data were analyzed using descriptive (percentage, mean, standard deviation) and inferential (Independent ‘t’ test and Pearson product moment correlation coefficient) statistics. Alpha level was set at p<0. 05.
Źródło:
Health Promotion & Physical Activity; 2019, 8, 3; 23-28
2544-9117
Pojawia się w:
Health Promotion & Physical Activity
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vaccinium myrtillus leaves and Frangula alnus bark derived extracts as potential antistaphylococcal agents
Autorzy:
Sadowska, Beata
Paszkiewicz, Małgorzata
Podsędek, Anna
Redzynia, Małgorzata
Różalska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/1039358.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
phytocompounds
antimicrobial activity
synergism with antibiotics
biocompatibility index
Opis:
Due to constantly increasing antibiotic resistance of pathogens and participation of the biofilms they make in various types of infections, a development of alternative therapeutic strategies becomes an urgent need. Taking advantage of the biological activity of plant-derived compounds can solve this problem. In this study antimicrobial, including those synergistic with classic antibiotics, and cytotoxic properties of newly-obtained extracts from Vaccinium myrtillus leaves (VLE) and Frangula alnus bark (FBE) were evaluated. Both tested extracts exhibited relevant antistaphylococcal activity (MIC range 0.75-1.5 mg/mL) accompanied by a relativly low cytotoxic effect on mammalian cells (BI > 1). Phytochemical analysis of the extracts tested showed a high total content of phenolic compounds with the predominance of hydroxycinnamic acids in VLE and hydroxybenzoic acids and flavanols in FBE. Widely described in the literature antimicrobial properties of phenolics were probably connected with the biological activity of the extracts tested. We also report that the presence of VLE or FBE at sub-MIC concentrations enhances biocidal potential of vancomycin and linezolid. Therefore, we are considering a possibility of an alternative therapy for local infections caused by S. aureus by combining classic antibiotics with plant-derived extracts.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 163-169
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors Associated with Physical Activity in People with Diabetes
Autorzy:
Sieńko-Awieraniów, Elżbieta
Stępień-Słodkowska, Marta
Latkowska, Agnieszka
Głowacka, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1054668.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Body Mass Index
diabetes mellitus
lifestyle
physical activity
Opis:
Background: Diabetes mellitus is a chronic disease related to the occurrence of numerous metabolic disorders. Their common feature is hyperglycaemia, caused by insufficient insulin secretion or its malfunction. The World Health Organization states that 346 million people worldwide have diabetes. The studies in adults with type 2 diabetes clearly demonstrate that the change of lifestyle behaviours effectively improves glycemic control. The modifications of lifestyle habits, such as regular physical activity and healthier dietary habits prove to be beneficial for patients. The aim of this study was to determine the factors affecting the level of physical activity in people with diabetes mellitus. Methods: Research material consisted of the data gathered from a diagnostic survey, which was conducted in a form of a questionnaire. The study included 60 people with type 1 or type 2 diabetes. Results: Unfortunately, the results show that not all of them were active enough, which is so crucial for stabilizing the disease. Conclusions: The diagnosis of diabetes in the respondents resulted in more time being spent by them on physical activity, which resulted in the improvement of diabetes control and the normalization of body weight according to BMI, thus increasing the effectiveness of diabetes treatment and reducing complications. The frequency of the physical activity undertaken by the respondents prior to the disease was not related to gender, however, after the diagnosis, it was dependent on gender
Źródło:
Central European Journal of Sport Sciences and Medicine; 2015, 12, 4; 73-81
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Womens activity status and fertility in Poland
Aktywność zawodowa kobiet i dzietność w Polsce
Autorzy:
Bagard, M.
Powiązania:
https://bibliotekanauki.pl/articles/38125.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
woman
activity
fertility
employment
birth index
determinant
child
Polska
Opis:
The intention of the analysis is to indicate socioeconomic determinants of fertility for Poland. The analysis is made with respect to the labour market structures, living conditions, gender norms and appreciated values. Logistic regression models of first and second birth order were used, based on the 2006–2010 Polish Labour Force Survey data. Despite registered rebound in TFRs, there is no evidence to prove the Hypothesis of Fertility Positive Turn holds for Poland. Incompatibility of paid-work and childcare points the premises of the positive turn have not been fulfilled yet. Instead, the stability hypothesis seems to have some evidence as models show significant relation of marital status, household status and the labour market situation of the partner to fertility.
Niniejsza analiza ma na celu wskazanie socjoekonomicznych determinant dzietności dla Polski. Analiza uwzględnia wpływ struktur rynku pracy, warunków życia, podziału ról ze względu na płeć i cenionych wartości. Zaprezentowano modele regresji logistycznej urodzeń pierwszego i drugiego dziecka, przygotowane na podstawie danych BAEL za lata 2006–2010. Pomimo zaobserwowanego odbicia w poziomie współczynnika dzietności, nie ma podstaw, by sądzić, że hipoteza o pozytywnym odbiciu współczynnika dzietności (the Hypothesis of Fertility Positive Turn) jest spełniona dla Polski. Trudności w łączeniu pracy zarobkowej i opieki nad dzieckiem wskazują, że przesłanki tej hipotezy nie zostały jeszcze spełnione. Wydaje się natomiast, że hipoteza o stabilizacji (the Stability Hypothesis) lepiej tłumaczy decyzję o urodzeniu i wychowaniu dziecka, jako że modele wskazują na istotną statystycznie relację między dzietnością a stanem cywilnym, faktem zamieszkania w domu rodziców i statusem męża/partnera na rynku pracy.
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2013, 12, 4
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical activity in perimenopausal women
Autorzy:
Makara-Studzinska, M.
Krys-Noszczyk, K.M.
Powiązania:
https://bibliotekanauki.pl/articles/3677.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Tematy:
physical activity
perimenopausal woman
menopause
woman
body mass index
Opis:
Introduction. The menopausal age of women is characterized by a high probability of health problems related with oestrogen deficiency and reduced ovarian hormonal activity. The most significant element in the therapy of the menopausal problems is to take part in physical activity on at least a moderate level, which is sufficient to maintain health. Objective. To investigate the effect of physical activity on the severity of the symptoms of menopause and body mass index BMI, which can decisively influence menopause. Material and methods. A group of respondents consisting of 210 women aged between 45–65 who were not using hormone replacement therapy, and staying at a rehabilitation centre. The study was conducted in 2013–2014 in the provinces of Silesia, Podlasie and Malopolska. Research tools consisted of a self-designed survey questionnaire and the Menopause Rating Scale (MRS). Results. Mean BMI indicated overweight of the women and their infrequency and low level participation in physical activity. The intensity of menopausal symptoms increased with BMI, and low physical activity of the respondents decreased with age. Increase in the intensity of physical activity decreased the severity of symptoms characteristic for menopausal age. Conclusions. Physical activity can play an important role in reducing menopausal symptoms and preventing the most frequently occurring diseases of menopausal age.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2015, 09, 1
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association between body mass and physical activity with quality of life in patients with rheumatoid arthritis
Autorzy:
Świtała, Anna
Wyszyńska, Justyna
Czerwińska, Kinga
Dereń, Katarzyna
Podgórska-Bednarz, Justyna
Guzik, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/454682.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
body mass index
quality of life
physical activity
rheumatoid arthritis
Opis:
Introduction. Rheumatoid arthritis (RA) is a progressive joint condition that leads to joints destruction and complications in the internal organs and significantly affects the a patient’s functional, physical, psychological and social condition. Over the last few years, research into the quality of life (QoL) in people with chronic disease has been conducted to assess the results of treatment. Aim. The aim of the study was to assess QoL in various areas of life in regards to physical and mental functioning, social relations, and environmental influences in people with RA. Material and methods. The study group (subjects with RA) and the control group (subjects without RA) consisted of 48 people each. Subject age ranged from 19 to 68. In order to assess QoL, the WHOQOL-BREF questionnaire was used, while socio-demographic data were assessed with a questionnaire developed by the authors. Results. QoL in people with RA was lower than that of healthy individuals. The worst QoL was observed in the physical domain. No statistically significant association was found between BMI and QoL. It was found, however, that subjects with RA and a higher level of physical activity had a better QoL than those with a lower level of physical activity. Conclusion. There was no association between the body mass of RA patients and QoL assessment. However, an association was found between the level of physical activity in people with RA and QoL in the physical and environmental domain.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 3; 200-205
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Night shift work and modifiable lifestyle factors
Autorzy:
Pepłońska, Beata
Burdelak, Weronika
Krysicka, Jolanta
Bukowska, Agnieszka
Marcinkiewicz, Andrzej
Sobala, Wojciech
Klimecka-Muszyńska, Dorota
Rybacki, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2178877.pdf
Data publikacji:
2014-10-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
night shift work
life style
physical activity
body mass index
Opis:
Objectives: Night shift work has been linked to some chronic diseases. Modification of lifestyle by night work may partially contribute to the development of these diseases, nevertheless, so far epidemiological evidence is limited. The aim of the study was to explore association between night shift work and lifestyle factors using data from a cross-sectional study among blue-collar workers employed in industrial plants in Łódź, Poland. Material and Methods: The anonymous questionnaire was self-administered among 605 employees (236 women and 369 men, aged 35 or more) - 434 individuals currently working night shifts. Distribution of the selected lifestyle related factors such as smoking, alcohol drinking, physical activity, body mass index (BMI), number of main meals and the hour of the last meal was compared between current, former, and never night shift workers. Adjusted ORs or predicted means were calculated, as a measure of the associations between night shift work and lifestyle factors, with age, marital status and education included in the models as covariates. Results: Recreational inactivity (defined here as less than one hour per week of recreational physical activity) was associated with current night shift work when compared to never night shift workers (OR = 2.43, 95% CI: 1.13-5.22) among men. Alcohol abstinence and later time of the last meal was associated with night shift work among women. Statistically significant positive relationship between night shift work duration and BMI was observed among men (p = 0.029). Conclusions: This study confirms previous studies reporting lower exercising among night shift workers and tendency to increase body weight. This finding provides important public health implication for the prevention of chronic diseases among night shift workers. Initiatives promoting physical activity addressed in particular to the night shift workers are recommended.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 5; 693-706
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usability of enzyme activity in estimation of forest soil quality
Autorzy:
Blonska, E.
Januszek, K.
Powiązania:
https://bibliotekanauki.pl/articles/38481.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
usability
enzyme activity
estimation
forest soil
soil quality
soil enzyme
site index
Opis:
Taking into account the progressive degradation of soils it is important to assess their quality. Soil quality depends on a large number of physical, chemical, biological and biochemical properties. In the publications available, there are presented three approaches regarding the use of soil properties to estimate soil quality: (1) the use of individual properties, (2) the use of simple indexes and (3) the use of complex indexes derived from combinations of different properties. The purpose of this study was to investigate the possibility to use enzymes as indicators of forest soil quality. Experimental plots (43) were located in central Poland. The study was carried out in a number of diverse fresh forest sites. To assess the quality of forest soils dehydrogenase and urease activity and the degree of base saturation were used. One of the final conclusions point out that enzymatic activity indicates current site condition as well as the changes that occur in soil better than soil physical and chemical properties. In other words, in comparison to soil enzymatic activity, soil physico-chemical properties constitute a less sensitive indicator of soil changes.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 1
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of operators’ fatigue using optical methods for determination of pupil activity
Autorzy:
Różanowski, Krzysztof
Bernat, Michał
Kamińska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2177401.pdf
Data publikacji:
2015-03-26
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
fatigue
activity of the pupil
pupillography
pupillary light reflex
pupillary unrest index
Opis:
Introduction The purpose of this study was to develop and initially validate an objective, yet quick, method for assessment of human fatigue. This aim can be achieved by the use of an optical, non-contact method of analysis of pupil activity. The study involved 2 phenomena typical for the behavior of the human pupil: pupillary reflex and pupillary movements. The 1st phenomenon is related to the pupillary light reflex (PLR), which presents the results of physiological adaptation mechanisms of the human eye. The pupillary unrest index (PUI) is an additional parameter referring to the tendency for instability of the pupil. Material and methods Indicators of these 2 mechanisms were assessed under the same experimental laboratory conditions. Assessment was conducted on a group of volunteers (N = 10) during 4 controlled series of measurements performed at night. Pupillary reflex parameters associated with PLR and pupillary unrest index (PUI) were recorded using F²D Fit-For-Duty, a commercially available system made by AMTech Pupilknowlogy GmbH. Baseline pupil diameter, oscillations, reflex latency, maximum reaction time, pupil constriction time, pupil dilation time, and constriction amplitude were recorded. Results As a result of the study, we were able to demonstrate correlation and confirm the usefulness of PLR and PST methods in the assessment of sleep deprivation. Parameters of PLR that may indicate human fatigue were identified. The effect of light impulse sequences on the dynamics of pupillary reflex and the relationship between PUI (pupillary unrest index) measurement duration and sleepiness assessment validity, were assessed. Conclusions The results of the pilot studies were sufficient to develop minimum requirements for a PLR sensor that would be capable of estimating the level of fatigue with accuracy of a PUI method, but at a 5 times faster rate.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 2; 263-281
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occupational and leisure time physical activity of territorial army soldiers during the COVID-19 pandemic in the context of their perceived work ability
Autorzy:
Grabara, Małgorzata
Sadowska-Krępa, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/2084910.pdf
Data publikacji:
2022-06-08
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
physical activity
energy expenditure
WHO recommendations
COVID-19 pandemic
Work Ability Index
Seven-Day Physical Activity Recall
Opis:
ObjectivesPhysical activity (PA) is important for the prevention and management of numerous diseases and may have a positive effect on ability to work. The study aimed to assess the level of occupational and leisure time PA of soldiers during the COVID-19 pandemic and to explore whether there was a relationship between PA and perceived work ability.Material and MethodsThe study involved 305 men and 68 women who were territorial army soldiers aged 18–55 (M±SD 32.9±9.01). The Seven-Day Physical Activity Recall (SDPAR) and the Work Ability Index (WAI) were used.ResultsThe level of self-reported PA for the studied soldiers was relatively high; 80% of them met the recommendations of the WHO and were characterized by having a good (60%) or excellent (20%) WAI status. The level of occupational PA of male soldiers was higher than the level of leisure time PA, and they indicated higher levels of occupational PA and leisure time PA during the workweek than the weekend.ConclusionsCurrent work ability in comparison to the best in life and work ability related to the physical requirements of the work were positively correlated with leisure time PA. Work ability related to physical requirements was also positively correlated with occupational and total PA, and work ability related to mental requirements was positively correlated with total PA. The study supports the relationship between PA and several aspects of work ability.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 3; 327-337
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innovative development of countries in the context of global economic imbalances
Autorzy:
Shkurat, Mariia
Temerbek, Alisa
Powiązania:
https://bibliotekanauki.pl/articles/1013687.pdf
Data publikacji:
2021-03-14
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
innovative activity
economic development
technology
technological and innovative development
Global Competitiveness Index
Opis:
The paper emphasises the fact that innovation is a driver for development and a leading factor in economic growth and ensuring a high level of competitiveness. The aim of the research is to determine the role of innovative development of a country in its economic development and competitiveness of the national economy. The world’s leading countries now face the challenge of building a competitive economy, so the dynamics of positioning countries in the Global Competitiveness Index and Global Innovation Index has been provided and the view that innovation plays an important role in the country’s development and the formation of its competitiveness confirmed. The authors have distinguished groups of countries by systematising the places they occupy. Furthermore, they have identified features of innovation strategies of the countries in the proposed groups. The paper also suggests integrated assessment of innovation and economic development of countries, which allows to determine their level, trace the dynamics and determine the relationship between innovation and economic development for every country. 
Źródło:
Research Papers in Economics and Finance; 2020, 4, 4; 49-60
2543-6430
Pojawia się w:
Research Papers in Economics and Finance
Dostawca treści:
Biblioteka Nauki
Artykuł

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