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Tytuł:
Optimization of Lycopene Extraction from Tomato Pomace and Effect of Extract on Oxidative Stability of Peanut Oil
Autorzy:
Tran, Dinh T.
Nguyen, Lan T.
Nguyen, Cuong N.
Hertog, Maarten L.
Nicolaï, Bart
Picha, David
Powiązania:
https://bibliotekanauki.pl/articles/16538548.pdf
Data publikacji:
2023-07-05
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
Antioxidant
Response surface methodology
Optimization
Lycopene
Extraction
Peanut oil stability
Opis:
Lycopene, the pigment principally responsible for the red color of tomatoes, is well-known for its strong antioxidant property and substantial health benefits. In this study, the optimal combination of factors for lycopene extraction from tomato pomace was identified using response surface methodology. The best practically feasible results maximizing both lycopene yield and antioxidant activity of the extract were obtained by applying a ratio of ethyl acetate to tomato waste of 35:1 (v/w), at a temperature of 55ºC for 100 min of extraction. The extract was then added to the peanut oil to evaluate its oxidative stability during 60 days of storage at 40ºC. It was shown that the addition of 2 g extract/kg oil offered the lowest level of peroxide value, p-anisidine value, and total oxidation value, followed by the oils with 50 mg butylated hydroxytoulene/kg oil and 1 g extract/kg oil, indicating the effect of lycopene-rich extract on enhancing the oxidative stability of peanut oil. The results in this study suggest that incorporation of extract rich in lycopene from tomato waste products may be an effective method to reduce oxidation and extend the shelf-life of peanut and other vegetable oils.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2023, 73, 3; 205-213
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrating general and local context-dependent factors into a framework for analysing business sectors in Bottom-of-the-Pyramid emerging markets
Autorzy:
Broeksma, Maaike
Pennink, Bart Jan Willem (Bartjan)
Powiązania:
https://bibliotekanauki.pl/articles/14123926.pdf
Data publikacji:
2021-06-21
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
Bottom-of-the-Pyramid (BoP)
multinational enterprises (MNEs)
emerging markets
market entry
business sector analysis
context dependency
Opis:
Abstract: Aim: This paper investigates how a framework for analysing business sectors in emerging markets looks like when taking into account the local context-dependent and general factors of The Bottom-of-the-Pyramid (BoP). The BoP segment in emerging markets represents a major growth potential for firms, including multinational enterprises (MNEs) from developed countries. However, the continued lack of success of MNEs in these markets has shown that generic one-size-fits-all strategies for the BoP are not appropriate as BoP contexts differ between countries. Design / Research methods: The sample that was selected for the research includes two non-governmental organizations (NGOs) related to the BoP and eight managers at MNEs with activities in the BoP have been interviewed in a semi-structured manner to collect rich data. Conclusion / findings: By interviewing eight managers at MNEs with activities in the BoP and two NGOs related to the BoP, an additional analysis, BoP-orientation, and further extensions to the original analyses are being presented. This results in an advanced framework for analysing business sectors in emerging markets. Originality / value of the article: Current frameworks for analysing business sectors in emerging markets do take into account inter-country differences but fail to recognize intra-country differences, which causes them to fall short on their applicability to the BoP. This paper fills the gap how frameworks for analysing business sectors in emerging markets can be made applicable for the BoP by taking into account both the local context-dependent and general factors of a BoP-market to analyse it for opportunities, threats, and eventually and strategic entry mode.
Źródło:
Central European Review of Economics and Management; 2021, 5, 2; 85-118
2543-9472
Pojawia się w:
Central European Review of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Limno-terrestrial diatom flora in two stream valleys near Arctowski Station, King George Island, Antarctica
Autorzy:
Noga, Teresa
Kochman-Kędziora, Natalia
Olech, Maria
Van de Vijver, Bart
Powiązania:
https://bibliotekanauki.pl/articles/2041794.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
South Shetland Islands
soil diatoms
sediments
diversity
Ornithologist Creek
Petrified Forest Creek
Źródło:
Polish Polar Research; 2020, 41, 4; 289-314
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Product Diversification on Corporate Social Performance in the Non-Renewable Energy Industry: Exploring the moderating effects of host country development and the Sustainable Development Goals
Autorzy:
Jongsma, Renske
Pennink, Bart Jan (Bartjan)
Powiązania:
https://bibliotekanauki.pl/articles/14138974.pdf
Data publikacji:
2020-12-17
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
stakeholder theory
institutional theory
product diversification
corporate social performance
sustainable development goals
non-renewable energy industry
Opis:
Aim: Building upon stakeholder and institutional theory, this paper investigates the relationship between product diversification and corporate social performance (CSP), thereby attempting to make essential contributions to the current literature. Based on an extensive literature review, it was expected that related, unrelated and total product diversification are positively related to CSP. Moreover, it was hypothesized that the exposure to weak institutional host country environments negatively affects the relationship between diversification and CSP, and that the Sustainable Development Goals (SDGs) have a positive effect on the relationship. Design / Research methods: The sample selected for this research is the non-renewable energy industry, since the industry shows great divergence in terms of corporate social responsibility (CSR) performance. In addition, the industry is highly susceptible to regulatory changes, while the Sustainable Development Goals have an enormous focus on the reliability and sustainability of energy, making it a highly relevant industry to study. This study analyzed 40 a 40 non-renewable energy firms over a time frame of seven years, by using OLS regression. Conclusions / findings: The results reveal that unrelated diversification is positively related to CSP, while the other forms of diversification show insignificant results. Contrary to expectations, the Sustainable Development Goals negatively affect the relationship between product diversification and CSP, while the moderating effect of exposure to weak institutional environments is insignificant. Originality / value of the article: Research on the relationship between product diversification on corporate financial performance is well-established, but the way in which product diversification influences a firm’s behavior towards stakeholder demands and social concerns remains largely unexplored. Accordingly, the results of this study challenge existing theories while adding more context to the existing relationship, and in turn provide promising avenues for future research.
Źródło:
Central European Review of Economics and Management; 2020, 4, 4; 69-95
2543-9472
Pojawia się w:
Central European Review of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of a desiccant evaporative cooling system for mango fruit storage in the savannah and transitional zones of Ghana
Analiza wydajności systemu pośredniego chłodzenia wyparnego do przechowywania owoców mango na sawanach i w strefach przejściowych Ghany
Autorzy:
Awafo, Edward
Addo, Ahmad
Bart-Plange, Ato
Powiązania:
https://bibliotekanauki.pl/articles/93621.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
mango
storage
dehumidification
evaporative cooling
Ghana
przechowywanie
osuszanie
chłodzenie wyparne
Opis:
Performance analysis of a 1.0 tonne desiccant evaporative cooling storage structure for mango fruits was studied. The study examined the effects of inlet air conditions and water flow rates through an absorber on the cooling performance of the system. The airflow rate was approximately 0.24 m3·s -1 and water flow rates through the absorber varied from 0 to 0.252 l·s -1 . The system produced approximately 7 kW of cooling at water supply rate of 0.252 l·s -1. A simple linear correlation was established for condition line slope from inlet to exiting air conditions for all the water flow rates. Lines of best fit resulted in correlation coefficient better than 0.96. The observed temperatures with a direct evaporative cooler, tested with freshly harvested mango fruits were found to be between 15.1°C and 23.4°C and relative humidity between 81.8% and 97.7%. Physiological weight loss and firmness assessments of the fruits were also conducted.
Artykuł omawia analizę wydajności chłodni wyparnej o poj. 1,0 tony, wykorzystywanej do przechowywania owoców mango. Zbadano wpływ warunków wlotowych powietrza i szybkości przepływu wody przez pochłaniacz na wydajność chłodniczą systemu. Natężenie przepływu powietrza wynosiło około 0,24 m3·s-1 , a natężenie przepływu wody przez absorber wahało się od 0 do 0,252 l·s-1 . W tym czasie wyprodukowano około 7 kW chłodu przy przepływie wody wynoszącym 0,252 l·s -1 . Określono prostą korelację liniową nachylenia linii wykresu warunków, od wlotu do wylotu powietrza, dla wszystkich wielkości przepływu wody. Linie o najlepszym dopasowaniu dały współczynnik korelacji powyżej 0,96. Zaobserwowane temperatury chłodni wyparnej, sprawdzane na świeżo zebranych owocach mango, wynosiły od 15,1°C do 23,4°C, a wilgotność względna od 81,8% do 97,7 %. Dokonano również oceny fizjologicznej utraty masy i jędrności owoców.
Źródło:
Agricultural Engineering; 2019, 23, 3; 1-14
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Freshwater diatoms of the Ecology Glacier foreland, King George Island, South Shetland Islands
Autorzy:
Kochman-Kędziora, Natalia
Noga, Teresa
Olech, Maria
Van De Vijver, Bart
Powiązania:
https://bibliotekanauki.pl/articles/2042083.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
King George Island
Ecology Glacier
diatoms
freshwater assemblages
Źródło:
Polish Polar Research; 2018, 39, 3; 393-412
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The appropriateness of electronic reverse auctions – an explanation from the incomplete contract theory and the resource dependence theory
Autorzy:
GELDERMAN, Cees J.
SEMEIJN, Janjaap
NAGEL, Bart Willem
Powiązania:
https://bibliotekanauki.pl/articles/529752.pdf
Data publikacji:
2017
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
Auctions
Procurement
Transactional relationships)
Other – electronic reversed auctions
Opis:
Despite the growing importance of electronic reversed auctions (ERAs) few empirical studies have explored the appropriateness of ERA usage. Most commonly, transaction cost theory has been used for these ERA-studies, relying on arguments that consider asset specificity as the primary explanation for organizational boundaries. We seek a more thorough explanation for perceived Electronic Reverse auctions (ERA) appropriateness, using multiple theoretical perspectives. This study includes insights and variables from the incomplete contract theory and the resource dependence theory. A conceptual model for ERA appropriateness was developed from the buyer perspective. This model was empirically validated using a survey of 176 purchasing professionals. The findings suggest a positive impact of buyer power on ERA appropriateness, while total interdependence does not appear to affect ERA appropriateness. The results further indicate that asset specificity stimulates ERA usage. ERA-minded purchasers consider ERAs as a tool for exploiting buyer power and for imposing relationship investments on suppliers. At the same time, variables related to collaboration do not appear to be important for ERA appropriateness from the perspective of the buyer. Suppliers are required to make relation-specific investments, but are not valued for their relational efforts. The novelty of this article Scholars have taken several approaches to investigate and to explain company’s sourcing decisions that include ERA use. We address an important gap in the literature by using the incomplete contract theory in combination with the resource dependence theory to provide a better understanding of buyers’ perceived ERA appropriateness.
Źródło:
Central and Eastern European Journal of Management and Economics (CEEJME); 2017, No. 1; 9-29
2353-9119
Pojawia się w:
Central and Eastern European Journal of Management and Economics (CEEJME)
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Data acquisition with the APEX hyperspectral sensor
Autorzy:
Vreys, Kristin
Iordache, Marian-Daniel
Bomans, Bart
Meuleman, Koen
Powiązania:
https://bibliotekanauki.pl/articles/1035944.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Hyperspectral
data acquisition
airborne
APEX
mission planning
Opis:
APEX (Airborne Prism EXperiment) is a high spectral and spatial resolution hyperspectral sensor developed by a Swiss-Belgian consortium on behalf of the European Space Agency. Since the acceptance of the instrument in 2010, it has been operated jointly by the Flemish Institute for Technological Research (VITO, Mol, Belgium) and the Remote Sensing Laboratories (RSL, Zurich, Switzerland). During this period, several flight campaigns have been performed across Europe, gathering over 4 Terabytes of raw data. Following radiometric, geometric and atmospheric processing, this data has been provided to a multitude of Belgian and European researchers, institutes and agencies, including the European Space Agency (ESA), the European Facility for Airborne Research (EUFAR) and the Belgian Science Policy Office (BelSPO). The applications of APEX data span a wide range of research topics, e.g. landcover mapping (mountainous, coastal, countryside and urban regions), the assessment of important structural and (bio)physical characteristics of vegetative and non-vegetative species, the tracing of atmospheric gases, and water content analysis (chlorophyll, suspended matter). Recurrent instrument calibration, accurate flight planning and preparation, and experienced pilots and instrument operators are crucial to successful data acquisition campaigns. In this paper, we highlight in detail these practical aspects of a typical APEX data acquisition campaign.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2016, 20, 1; 5-10
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association between psychosocial characteristics of work and presenteeism: A cross-sectional study
Autorzy:
Janssens, Heidi
Clays, Els
de Clercq, Bart
de Bacquer, Dirk
Casini, Annalisa
Kittel, France
Braeckman, Lutgart
Powiązania:
https://bibliotekanauki.pl/articles/2177072.pdf
Data publikacji:
2015-11-06
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
job stress
sickness presence
psychosocial risk factors
bullying
work-family conflict
workload
Opis:
Objectives This study aimed at investigating cross-sectional relationships between psychosocial characteristics of work and presenteeism in a sample of Belgian middle-aged workers. Material and Methods Data were collected from 1372 male and 1611 female workers in the Belstress III study. Psychosocial characteristics assessed by the use of self-administered questionnaires were: job demands, job control, social support, efforts, rewards, bullying, home-to-work conflict and work-to-home conflict. Presenteeism was measured using a single item question, and it was defined as going to work despite illness at least 2 times in the preceding year. Logistic regression models were used to investigate the relationship between psychosocial characteristics and presenteeism, while adjusting for several socio-demographic, health-related variables and neuroticism. An additional analysis in a subgroup of workers with good self-rated health and low neuroticism was conducted. Results The prevalence of presenteeism was 50.6%. Overall results, adjusted for major confounders, revealed that high job demands, high efforts, low support and low rewards were associated with presenteeism. Furthermore, a significant association could be observed for both bullying and work-to-home conflict in relation to presenteeism. The subgroup analysis on a selection of workers with good self-rated health and low neuroticism generally confirmed these results. Conclusions Both job content related factors as well as work contextual psychosocial factors were significantly related to presenteeism. These results suggest that presenteeism is not purely driven by the health status of a worker, but that psychosocial work characteristics also play a role.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 2; 331-344
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Covariate Selection for Small Area Estimation in Repeated Sample Surveys
Autorzy:
van den Brakel, Jan A.
Buelens, Bart
Powiązania:
https://bibliotekanauki.pl/articles/465973.pdf
Data publikacji:
2015
Wydawca:
Główny Urząd Statystyczny
Tematy:
area level models
cAIC
Hierachical Bayesian predictors
Opis:
If the implementation of small area estimation methods to multiple editions of a repeated sample survey is considered, then the question arises which covariates to use in the models. Applying standard model selection procedures independently to the different editions of the survey may identify different sets of covariates for each edition. If the small area predictions are sensitive to the different models, this is undesirable in official statistics since monitoring change over time of statistical quantities is of utmost importance. Therefore, potential confounding of true change and methodological alterations should be avoided. An approach to model selection is proposed resulting in a single set of covariates for multiple survey editions. This is achieved through conducting covariate selection simultaneously for all editions, minimizing the average of the edition-specific conditional Akaike Information Criteria. Consecutive editions of the Dutch crime victimization survey are used as a case study. Municipal estimates of three survey variables are obtained using area level models. The proposed averaging strategy is compared to the standard method of considering each edition separately, and to an elementary approach using covariates selected in the first edition. Resulting models, point estimates and MSE estimates are analyzed, indicating no substantial adverse effects of the conceptually attractive averaging strategy.
Źródło:
Statistics in Transition new series; 2015, 16, 4; 523-540
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health Impact Assessment of an oil drilling project in California
Autorzy:
McCallum, Lindsay C.
Souweine, Kathleen
McDaniel, Mary
Koppe, Bart
McFarland, Christine
Butler, Katherine
Ollson, Christopher A.
Powiązania:
https://bibliotekanauki.pl/articles/2177071.pdf
Data publikacji:
2015-11-27
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
oil production
air quality
Health impact assessment
HIA
health effects
social determinants
Opis:
Objectives The Health Impact Assessment (HIA) was conducted to evaluate the potential community health implications of a proposed oil drilling and production project in Hermosa Beach, California. The HIA considered 17 determinants of health that fell under 6 major categories (i.e., air quality, water and soil quality, upset conditions, noise and light emissions, traffic, and community livability). Material and Methods This paper attempts to address some of the gaps within the HIA practice by presenting the methodological approach and results of this transparent, comprehensive HIA; specifically, the evaluation matrix and decision-making framework that have been developed for this HIA and form the basis of the evaluation and allow for a clear conclusion to be reached in respect of any given health determinant (i.e., positive, negative, neutral). Results There is a number of aspects of the project that may positively influence health (e.g., increased education funding, ability to enhance green space), and at the same time there have been potential negative effects identified (e.g., odor, blowouts, property values). Except for upset conditions, the negative health outcomes have been largely nuisance-related (e.g., odor, aesthetics) without irreversible health impacts. The majority of the health determinants, that had been examined, have revealed that the project would have no substantial effect on the health of the community. Conclusions Using the newly developed methodology and based on established mitigation measures and additional recommendations provided in the HIA, the authors have concluded that the project will have no substantial effect on community health. This approach and methodology will assist practitioners, stakeholders and decision-makers in advancing the HIA as a useful, reproducible, and informative tool.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 2; 229-253
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jan Karski a odpowiedzialność za ochronę
Autorzy:
Smolar, Eugeniusz (1945- ).
Współwytwórcy:
Szewczyk, Bart M. J. Redakcja
Wydawnictwo Naukowe Semper. pbl
Fundacja Edukacyjna Jana Karskiego. pbl
Data publikacji:
2015
Wydawca:
Warszawa : Wydawnictwo Naukowe Semper : Fundacja Edukacyjna Jana Karskiego
Tematy:
Karski, Jan (1914-2000)
Bezpieczeństwo międzynarodowe
Ludobójstwo
Ochrona prawna
Prawa człowieka
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Some fragments of second-order logic over the reals for which satisfiability and equivalence are (un)decidable
Autorzy:
Grimson, Rafael
Kuijpers, Bart
Powiązania:
https://bibliotekanauki.pl/articles/1368654.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Opis:
We consider the $\Sigma_0^1$-fragment of second-order logic over the vocabulary $\langle+, \times, 0, 1, <, S_1, ..., S_k \rangle$, interpreted over the reals, where the predicate symbols $S_i$ are interpreted as semialgebraic sets. We show that, in this context, satisability of formulas is decidable for the first-order $\exists$*-quantifier fragment and undecidable for the $\exists$*$\forall$- and $\forall$*-fragments. We also show that for these three fragments the same (un)decidability results hold for containment and equivalence of formulas.
Źródło:
Reports on Mathematical Logic; 2014, 49; 23-34
0137-2904
2084-2589
Pojawia się w:
Reports on Mathematical Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
HOW TO PAVE THE ROAD TO A BETTER FUTURE FOR PHYSICAL EDUCATION
Autorzy:
Crum, Bart
Powiązania:
https://bibliotekanauki.pl/articles/449227.pdf
Data publikacji:
2013
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:
physical education
PETE
program
Opis:
Polemics
Źródło:
Journal of Physical Education & Health - Social Perspective; 2013, 2, 3; 53-64
2084-7971
Pojawia się w:
Journal of Physical Education & Health - Social Perspective
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 30

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