Wyniki wyszukiwania - Biblioteka Nauki

1

Procrastination – why do we still know too little

100%

Dryll E.

Psychologia Wychowawcza

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2017

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tom 54(12)

152-163

EN

The aim of the current literature review is to turn the readers’ attention to the methods and tools used when studying procrastination. Procrastination, which is a chronic postponing of our duties, is usually studied with tools such as questionnaires filled by the participants or other tools using closed-end questions. The participants, therefore, cannot openly describe why they procrastinate. Giving them such an opportunity could significantly improve our understanding of the causes and conditions of procrastination as well as ways of justifying it. In our culture, postpoing one’s duties is usually connected with serious consequences – participants admit a deep feeling of shame, anxiety, powerlessness and hopelessness. They declare, that despite own motivation they repeat old, irrational behavioral patterns. Taking into account the scale of this phenomenon (75–90% of students admit to procrastination), the issue of an in-depth understanding of its mechanisms seems vital. The text also postulates a follow-up of the previous methods with qualitative analysis.

2

Codes of conduct and codes of ethics as tools used to support the idea of social responsibility in supply chains

100%

Rudnicka A.

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nr 464

91-100

EN

Suppliers are important links in the value chain of modern enterprises. The rapid changes that are happening on the market now were an impulse for the development of concepts that help to manage such a complex environment. The concept of Corporate Social Responsibility (CSR) may support the development of sustainable supply chains. The management of social issues in supply chains is becoming more and more important. The main reasons for that is the increasing risk of undesirable situations in supply chains that can cause real problems for business. One of possible responds of business is the implementation of code of conduct or code of ethics addressed to suppliers. This paper presents the potential role of codes of ethics and codes of conduct as tools that support the management of social and environmental issues of supply chain. Theoretical considerations will be supported by a qualitative analysis of codes of ethics and codes of conduct published by socially responsible companies from Poland (on the basis on IX Ranking Odpowiedzialnych Firm).

3

Tool Features to Support Systematic Reviews in Software Engineering – A Cross Domain Study

100%

Marshall C. , Kitchenham B. , Brereton P.

e-Informatica Software Engineering Journal

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2018

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tom Vol. 12, nr 1

79--115

EN

Context: Previously, the authors had developed and evaluated a framework to evaluate systematic review (SR) lifecycle tools. Goal: The goal of this study was to use the experiences of researchers in other domains to further evaluate and refine the evaluation framework. Method: We investigate the opinions of researchers with experience of systematic reviews in the healthcare and social sciences domains. We used semi-structured interviews to elicit their experiences of systematic reviews and SR support tools. Results: Study participants found broadly the same problems as software engineering (SE) researchers with the SR process. They agreed with the tool features we had included in our evaluation framework. Furthermore although there were some differences the majority of the importance assessments were very close. Conclusions: In the context of SRs, experiences of researchers in other domains can be useful to software engineering researchers. The evaluation framework for SR lifecycle tools appeared quite robust.

4

The Youth Soccer Coaches’ Visions and Thoughts of Leader Support

88%

Hertting K. , Kostenius C.

|

2016

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tom 70

|

nr 1

69-78

EN

The Objectives: The European Commission has highlighted the use of sports as an important venue for engaging citizens in health-enhancing activities, physical activity, volunteerism and active citizenship. Coaching is a central component of sports for children and youth, but there is little research on the promotion of sports coaches’ health. In the light of this gap, the aim of this paper was to elucidate youth soccer coaches’ visions and thoughts regarding leadership support from clubs and soccer associations. Design and method: The study was based on an online questionnaire conducted with Swedish soccer coaches who coached children and young people between 6 and 18 years of age. In total, 1514 coaches received the online questionnaire via email and 764 coaches (50.5% of the sample) answered. Three hundred and seventy-five coaches answered the open question: ‘How would you describe the support you, as a coach, would like to receive from clubs and associations?’ Responses were analysed using method. Results: Four main themes emerged from the analysis: financial and other resources support, recognition of contribution, sense of belonging to a value-based association and positive coach development. Conclusion: We discuss the factors that support soccer coaches and how these can serve as health-promoting supports for coaches working with children and youth.

5

Application of spectral analyses for surface layer changes estimation of co-operating units with conformal contact

88%

Matuszewski M. , Łukasiewicz M. , Musiał J.

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tom Vol. 7, no 3

191-197

EN

The qualitative opinion of the surface layer condition was introduced in this paper. The usefulness of spectral analyses was analysed to the opinion of changes proceed in the surface layer of co-operating units. The functions of the power spectral density and autocorrelation which were used to analyses were self- characterized. The structures of the surface after tribology investigations were accepted to the opinion of proceeding changes. Spectral graphs were analysed for structures without the co-operation (directly after the finishing processing) and after the various roads of the friction. The following intervals of the road of the friction were used to the qualitative opinion: 100, 200, 300, 500 metres – there are most intensive changes and 2000 metres – the stabilization of changes follows. The conditions during tribology investigations were accepted as stable. The received graphs of the power spectral density and autocorrelation function approve oneself useful in the opinion of the changes proceed of surface layer during her transformation.

6

Les mots de l’écologie : étude lexicométrique d’un corpus bilingue personnalisé (ECOTEXT 2021)

88%

Kaliska A. , Gostkowska K.

Studia Romanica Posnaniensia

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2022

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tom 49

|

nr 4

43-63

EN

Our goal is to compare the words that are central to the discourses initiated by the most essential environmental protection organizations, both international and local, acting in France and in Poland. Our analysis is carried out in three stages: after briefly presenting some of the computerized corpus analysis methods and equipment we used to collect and process our bilingual corpus named ECOTEXT, we check its specificity and then move on to calculating word frequency and interpreting the frequency lists, starting with the analysis of the most frequent toponyms (e.g. France and Polska) and continuing with the most frequently represented nouns and adjectives. Throughout our analysis we return to the notion of interlinguisticequivalence which, as we shall show, does not turn out to be fully operative in confirming or denying the similarity of two discourses studied.

7

Directed hypergraph observers-based qualitative fault monitoring tasks

75%

Garai D. , El Harabi R. , Bacha F.

Diagnostyka

|

2021

|

tom Vol. 22, No. 4

67--76

EN

To create a precise model structure and perform fault monitoring algorithms for a wide range of complex systems along with dynamic behavioural characteristics, the causal graph-based methods were considered herein. In this paper, a new scheme was devised based on fast fault detection mechanism relying on the Directed Hypergraph Observer model. The performance of the suggested pattern is illustrated by a case study including systems with single energy. Noting that the modern methods possess a large range of applications for the reliability and energy effectiveness analysis related to multi-energy systems. The Directed Hypergraph model architecture was exploited to generate the diagnostic condition based on a graphical observer.

8

Społeczna konstrukcja dokumentów i danych urzędowych. Dane medyczne

75%

Maciąg R.

Przegląd Socjologiczny

|

2012

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tom 61

|

nr 1

179-200

PL

Konstrukcja społeczna oznacza, że dokument lub dane są wytworem organizacji, w której powstają. Dokument jest na tyle wiarygodny, na ile organizacja pragnie wykazać swoje osiągnięcia albo ukryć wady. W ten sposób powstają sprawozdania urzędowe, kościelne lub bankowe. Jednym z rodzajów danych są dane medyczne: samobójstwa, dane psychiatryczne czy dane na temat aborcji. W artykule poruszono problem małego zaufania socjologów do danych urzędowych i jednocześnie większej akceptacji administracyjnych danych ilościowych. Artykuł zwraca uwagę na koncepcje fenomenologiczne i etnometodologiczne, przyczyniające się jednocześnie do rozwoju analizy jakościowej w socjologii. Szczególnym przykładem może być rejestracja samobójstw i badanie definicji sytuacji w ustalaniu danych pierwotnych. Urzędowy charakter danych i dokumentów jako wytworu instytucji wiąże się z odrębnym traktowaniem procesu społecznego, jakim jest etap zbierania i przygotowania danych oraz ich publikacji. Jednocześnie koncepcja obiektywności danych, którą badacz przyjmuje, jest koncepcją rozumienia nauki, ponieważ – w ujęciu fenomenologiczno-konstrukcyjnym – dokumenty i dane są traktowane per se, jako samodzielne przedmioty badania. Taki proces badawczy warto analizować w momencie powstawania danych, to jest w chwili ich gromadzenia w organizacji lub zbierania materiałów do sprawozdania

EN

Social construction means that the document or data are a product of the organization in which they arise. The official document is so reliable, what the organization wants to show their achievements and to hide flaws. In this way are product official reports, church or bank. Special types of medical data are: suicide, psychiatric and abortion data. The article discusses the problem of low confidence sociologists in the official data and greater acceptance for the administration of quantitative data in medical. It is noted that the phenomenological and ethnometodological concepts they contributed to the development of qualitative analysis in sociology. A specific example is the registration of suicide and the definition of situation analysis the primary data. Official nature of the data and documents as a product of the institutions associated with the separate treatment of the social process, which is the stage of data collection and preparation and publication. The concept of reliability of the data by researchers adopted is to understanding the concept of science, since – in terms of phenomenological-constructive – documents and data are considered per se, as study are an independent research subjects. Such research process can be analyzed the data at the time of formation, that is, at the time of collection in the organization.

9

Gendered Biographies: The Czech State-Socialist Gender Order in Oral History Interviews

75%

Hájek M. , Vann B. H.

Sociologický časopis. Czech Sociological Review

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2015

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tom 51

|

nr 6

1077-1105

EN

A large collection of autobiographical life story material available in oral-history data is used to examine how women and men of different socio-political groups (workers, intelligentsia, dissidents, and communist functionaries) narrate their lives in the time of state-socialist Czechoslovakia. Of particular interest is what these narratives imply for an understanding of the state-socialist gender order. The analysis combines quantitative (the frequency of word co-occurrences) and qualitative (a hermeneutic reading of text fragments) approaches. The results provide evidence that empirically supports what has previously been suggested in the literature: there was an interdependence of private and public spheres, with the family sphere differing in importance for women and men. Additionally, the discursive density and arrangement of these spheres in the life stories differs according to sociopolitical groups, and a third sphere, which we have labelled ‘politics’, emerges for some groups. The findings reveal insights into the relationship between the gender order and the life course through a narrative articulation of life stories of different social groups in Czech state-socialist society.

10

Znaczenie analizy jakościowej w ewaluacji polityk publicznych na przykładzie programu ASOS

75%

Klimowicz M. , Michalewska-Pawlak M.

Problemy Polityki Społecznej. Studia i Dyskusje

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2018

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nr 40(1)

87-105

PL

Niniejszy artykuł naukowy ma na celu wyjaśnienie znaczenia badań jakościowych, w szcze¬gólności zaś metody process tracing, w ewaluacji rządowego programu na rzecz aktywności społecznej osób starszych (ASOS). W artykule przedstawiono metodykę zastosowania metody process tracing wykorzystywanej w badaniu studium przypadku oraz warunki, w jakich może być ona użyteczna w określaniu efektów realizacji programu w ramach polityk publicznych. Artykuł został oparty na badaniach przeprowadzonych w ramach projektu naukowego Innovative Social Investment Strenghtening Communities in Europe (InnoSi) finansowa¬nego przez Komisję Europejską z programu Horyzont 2020. W głównej części artykułu zaprezentowano częściowe wyniki badań empirycznych mających formę analizy studium przypadku i obejmujących projekt Aktywni bez względu na wiek w oparciu o metodę process tracing.

EN

The objective of the paper is to explain the importance of qualitative research, particularly the process tracing method in the public policies evaluation. The article presents the methodology of using process tracing method and the conditions of its implementation in evaluation of public policies programmes. The article is based on research carried out within the research project ‘Innovative Social Investment Strengthening Communities in Europe' (InnoSi), financed by the European Commission in the frames of Horizon 2020 Programme. The main part of the article presents the partial results of empirical research based on the process tracing method, in the form of case study analysis covering the project ‘Active regardless the age'

11

Red danger before elections: Trick or threat?

75%

Křeček J. , Vochocová L.

Central European Journal of Communication

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2009

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tom 2

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nr 2(3)

307-318

EN

Before the parliamentary election in 2006 we focused on the tendency of the Czech soci- ety and especially media to exclude one of the parliamentary parties – the Communist Party – from the government and to actively construct its status as specific. We designate this tendency as anti-com- munism, a word commonly used in the Czech political communication. According to our outcomes, anti-communism was a remarkable trend at the pages of at least three Czech dailies: Mladá Fronta DNES, Lidové noviny and Hospodářské noviny. The anti-communism as performed in their content was not only a media representation of an all-society phenomenon. It was actively constructed and supported by the journalists, editors and publicists of these dailies. Especially the two fi rst mentioned newspapers can be perceived as actively anti-communist media both in the sense of their own involve- ment (the agenda setting, the content of editorials, etc.) and the manifest support of anti-communist voices (even PR information at the news pages). Právo, the fourth analyzed newspaper, can be by contrast characterized as anti-anticommunist or at least anti-antileftist trying to construct a more positive image of the Communist Party and challenging the anti-communist tendencies

12

Classical and generalized invariant solutions of the relaxing hydrodynamics equations

75%

Vladimirov V.

Opuscula Mathematica

|

2003

|

tom Vol. 23

81-94

EN

We analyze the set of invariant travelling wave solutions of the relaxing hydrodynamics models and state the conditions that guarantee the existence of periodic solutions and limiting to them soliton-like regimes. We also study the existence of the shock wave invariant solutions. In some special case the periodic invariant solution is shown to give rise to the blow-up regime.

13

Evaluation of changes of stereological parameters of eutectic phases in AlSiMg alloy after precipitation hardening

75%

Grzegorek J. , Tarasek A. , Olszowska-Sobieraj B. , Lewicki P.

Metallurgy and Foundry Engineering

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2017

|

tom Vol. 43, no. 3

169--177

EN

Qualitative microstructure investigations of the AlSiMg alloy’s microstructure in both its original state (with the characteristic primary structure) and after precipitation hardening revealed the significant heterogeneity of the eutectic phases concerning their shape, size, and distribution. An evaluation of the stereological parameters of the eutectic phases was carried out. The computer‑image analysis was performed in order to define the fraction of the relative volume and shape of the eutectic phases and to establish their influence on the mechanical properties.

PL

Jakościowe badania mikrostruktury stopu AlSiMg, zarówno w stanie wyjściowym (o charakterystycznej strukturze pierwotnej), jak i po utwardzaniu wydzieleniowym, wykazały występowanie w badanym stopie istotnych niejednorodności faz eutektycznych pod względem kształtu, wielkości oraz rozmieszczenia. W pracy przeprowadzono ocenę parametrów stereologicznych faz eutektycznych w stopie AlSiMg zarówno w stanie wyjściowym, jak i po utwardzaniu wydzieleniowym. Wykorzystując analizę obrazu komputerowego, określono udział objętościowy względnej faz eutektycznych oraz ich kształt, a także ustalono ich wpływ na właściwości mechaniczne.

14

Przejawy finansyzacji polskich spółek giełdowych w opinii menedżerów. Wyniki badań własnych

75%

Socha B. , Urban D.

Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia

|

2019

|

tom 53

|

nr 4

EN

Theoretical background: The article discusses the issue of financialization defined as partial decoupling of the financial sector from the real economy. This phenomenon can be considered from the point of view of economies, markets (including commodity markets), financial and non-financial companies as well as household. The article deals with the issue of financialization of Polish listed companies. The main symptom of this phenomenon is increased importance of financial operations in the process of generating added value.Purpose of the article: To assess the declarative degree of financialization of selected listed companies as well as to identify factors that may be related to the phenomenon of financialization in the analyzed entities.Research methods: The analysis of literature and presentation of the results of authors’ own qualitative research. In the empirical part, the measures of central tendency, classification based on the k-means method and the Mann–Whitney U test were used.Main findings: The obtained results suggest that the phenomenon of financialization does not seem to play a significant role in shaping the operating activity of Polish listed companies from the analyzed sectors. In addition, it was shown that the innovative potential, market position, size of the company and sales markets may be related to the degree of finanacialization. This paper contributes to the national literature with the phenomenon of financialization of non-financial enterprises in the context of changes taking place in the enterprise from the financial managers’ perspective.

PL

Uzasadnienie teoretyczne: Artykuł dotyczy kwestii finansyzacji rozumianej jako częściowe odseparowanie sfery finansowej od sfery realnej gospodarki. Zjawisko to rozpatrywane jest w literaturze z punktu widzenia gospodarek, rynków (w tym rynków towarowych), przedsiębiorstw finansowych i niefinansowych oraz gospodarstw domowych. W opracowaniu poruszono problematykę finansyzacji polskich spółek giełdowych, której przejawem jest wzrost znaczenia operacji finansowych w procesie generowania wartości dodanej.Cel artykułu: Deklaratywna ocena stopnia finansyzacji wybranych spółek giełdowych, a także identyfikacja czynników, które mogą mieć związek ze zjawiskiem finansyzacji w analizowanych podmiotach.Metody badawcze: Analiza literatury oraz prezentacja i omówienie wyników badań własnych o charakterze jakościowym. W części empirycznej wykorzystano miary tendencji centralnej, klasyfikację opartą na metodzie k-średnich oraz test U Manna-Whitneya.Główne wnioski: Zjawisko finansyzacji, zgodnie z uzyskanymi wynikami, wydaje się obecnie nie odgrywać znaczącej roli w kształtowaniu działalności operacyjnej polskich spółek giełdowych z analizowanych sektorów. Ponadto wykazano, iż potencjał innowacyjny, pozycja rynkowa, wielkość spółki oraz rynki zbytu mogą mieć związek ze stopniem finansyzacji. Wartością dodaną, jaką niniejsze opracowanie wnosi do krajowej literatury, jest ukazanie zjawiska finansyzacji przedsiębiorstw niefinansowych w kontekście zmian zachodzących w przedsiębiorstwie w opinii menedżerów finansowych.

15

Analiza jakościowa planu przeniesienia przystanku kolejowego Skawina Zachodnia

75%

Koń P. , Kozioł P.

Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne

|

2018

|

tom Nr 2(116)

61--73

PL

Artykuł przedstawia analizę potencjału transportowego przystanku kolejowego Skawina Zachodnia, z uwzględnieniem zmiany jego lokalizacji. Dokonano porównania stanu aktualnego ze stanem projektowym. Przeanalizowano zasadność koncepcji zawartej w przetargu na opracowanie dokumentacji projektowej i wykonanie robót budowlanych na odcinku Kraków Płaszów – Podbory Skawińskie, oraz w sposób szczególny, możliwości jakie daje jego realizacja w odniesieniu do warunków transportowych i gospodarczych oraz mobilności mieszkańców Skawiny Zachodniej.

EN

The paper presents the analysis of the transport potential of the Skawina Zachodnia railway stop, taking into account the change of its location. The current status is compared with the design state. The validity of the concept included in the tender for the development of project documentation and execution of construction works on the Krakow Plaszow - Podbory Skawinskie section is analyzed with special emphasis on the possibilities offered by its implementation in terms of transport and economic conditions and mobility of Skawina Zachodnia residents.

16

The Nurturer Verbal Portrayal in Cinema: Narrative Analysis

75%

Berezhna M.

Pomiędzy. Polonistyczno-Ukrainoznawcze Studia Naukowe

|

2023

|

nr 8(1)

47-56

EN

The research focuses on psycholinguistic analysis of a female cinematic archetype. The characters’ narratives are predominantly defined by the heroines’ archetype and personality; to a lesser extent by the context of the cinematic story. The study is based on Jung’s idea of the archetype as a repetitive image of the collective unconscious, common for different cultures, languages, and societies. Each archetype performs a certain function in the plot, predetermined by a number of constant motivations, defining the characters’ (verbal) behavior. Post-Jungian researchers have developed various typologies of psychological archetypes. Among the proposed repetitive images, one of the most recognized is the Great Mother / Caregiver / Nurturer, which is distinguished by care, protectiveness, devotion, and sacrifice. Maslow’s hierarchy of human needs serves as the basis for delineation of archetypes. Despite numerous changes in the representation of female characters in mass culture cinema, the Nurturer archetype (term by Schmidt, 2007; Cowden, LaFever, & Viders, 2013) stays essential and frequently exploited. This study focuses on the verbal representation of the Nurturer archetype in three top box office cinematic stories recreating the Beauty and the Beast motif, namely Beauty and the Beast (2017), The Twilight Saga (2008-2012), and Fifty Shades trilogy (2015-2018). The paper focuses respectively on the turns of Belle, Bella Swan, and Anastasia Steele, leading female protagonists representing the Nurturer archetype in the examined franchises. The founding idea of the present paper postulates that the verbal representation of the same archetype bears similar narratives, which mediate the heroines’ needs and motivations. The aim of the research is to establish the set of narratives, characteristic of the Nurturer archetype in contemporary cinematic stories. The Nurturer archetype is an altruistic, parental character, distinguished by protectiveness, compassion, and generosity. The Nurturer needs to care for the loved ones, which defines her narratives about providing food, comfort, safety, protection and reassurance, dependence, stability, love, and affection. The ‘virgin-beast trope’ predetermines the heroine’s narrative of a romantic relationship.

17

Wspomaganie decyzji w procesie doboru penetrantów fluorescencyjnych do przemysłowych badań nieniszczących

75%

Siwiec D. , Bednarowa L. , Pacana A. , Zawada M. , Rusko M.

Przemysł Chemiczny

|

2019

|

tom T. 98, nr 10

1594--1596

PL

Zaproponowano efektywną metodykę wspierającą podjęcie decyzji dotyczącej wyboru penetrantu fluorescencyjnego do badań nieniszczących. W wyniku zastosowania zaproponowanej metodyki wybrano odpowiedni penetrant chemiczny spełniający postawione wymagania. Opisane działania miały miejsce w przedsiębiorstwie MB Aerospace. Instrumentem wspomagającym podjęcie decyzji w zakresie wyboru penetrantu była analiza kosztowo-jakościowa (AKJ) uzupełniona metodą oceny jakości, punktacją sformalizowaną (PS). W trakcie analizy wykazano, że nie zawsze najwyższa jakość i najniższa cena stanowią gwarancję najlepszego wyboru. W tym przypadku najkorzystniejszy okazał się penetrant oznaczony symbolem P1.

EN

An effective methodol. for selecting the most favourable material was developed. It was based on cost-quality anal. supplemented by a method of quality assessment in the form of formalized score. The highest quality and the lowest price guaranteed not always the best choice.

18

Qualitative analysis and estimation of content of phenolic acids from fruit of Hacquetia epipactis [Scop] DC. by chromatographic methods

75%

Bartnik M. , Stolarczyk A. , Glowniak P. , Burczyk J. , Glowniak K.

Herba Polonica

|

2003

|

tom 49

|

nr 3-4

EN

Hacquetia epipactis (Scop.) DC. (Umbelliferae) is the only species of the genus Hacquetia growing mainly in Poland. In presented work extracts from fruits of this plant were investigated on the presence of phenolic acids. Free phenolic acid fractions and fractions obtained from the acid and alkaline hydrolyses were analysed by 2D TLC on cellulose layers. Chromatograms were observed in UV light (366 nm) before and after treatment with ammonia vapour and in daylight after derivatisation with 3% FeCI3 or diazotized sulphanilic acid. RP-HPLC analysis was performed using mobile phase methanol-water (20:80) with 1% acetic acid (v/v). Before HPLC samples had been purified using SPE method. The contents of phenolic acids in extract from fruits of Hacquetia (in ng/g of dry mass) were as follows: 47.69 - caffeic, 34.00 - p-coumaric, 15.35 - protocatechuic, 9.03 - p-hydroxybenzoic, 7.31 - ferulic and 6.22 - vanillic acid.

PL

Hacquetia epipactis (Scop.) DC. (Umbelliferae) jest jedynym gatunkiem z rodzaju Hacquetia rosnącym w Polsce. W prezentowanej pracy analizowano ekstrakt z owoców tej rośliny pod kątem obecności kwasów fenolowych. Frakcje kwasów fenolowych wolnych i otrzymane w wyniku hydrolizy kwaśnej i zasadowej badano stosując chromatografię cienkowarstwową dwukierunkową (2D TLC) na płytkach celulozowych. Chromatogramy obserwowano w świetle UV (366 nm) przed i po zadziałaniu par amoniaku oraz w świetle dziennym po derywatyzacji 3% metanolowym roztworem FeCI3 lub zdiazowanym kwasem sulfanilowym. Analizę RP-HPLC prowadzono w izokratycznym układzie metanol- -woda (20:80) z dodatkiem 1% kwasu octowego (v/v) po uprzednim oczyszczeniu próbek metodą SPE. Analiza ekstraktu z owoców Hacquetia wykazała zawartość wolnych kwasów fenolowych (wyrażoną w (ag/g suchej masy) jak następuje: 47,69 - kawowy; 34,00 - p-kumarowy; 15,35 - protokatechowy; 9,03 - p-hydroksybenzoesowy; 7,31 - ferulo- wy i 6,22 - wanilinowy.

19

Comparative analysis of anthocyanin composition of juices obtained from selected species of berry fruits

75%

Stoj A. , Malik A. , Targonski Z.

|

nr 4

EN

A qualitative and quantitative analysis of anthocyanins in juices of three varieties of strawberry (Senga, Ducat, Marmolada), raspberry (Beskid, Canby, Malling Seedling), black currant (Ben Lomond, Titania, Ojebyn) and red currant (Rondom, Jonker, Holenderska) picked in three following years: 1998, 1999 and 2000, was presented in this paper. An HPLC technique was applied using a Gilson chromatograph and a DAD detector. Prior to the chromatographic analysis, anthocyanins were purified on a mini-column Sep-Pak C18 Waters. It was indicated that within species the juices examined differed in the quantitative and qualitative composition of anthocyanins. Pelargonidin-3-glucoside and cyanidin-3-xylorutinoside were the main anthocyanins in strawberry and red currant juices, respectively, independently of variety. Those anthocyanins were not detected in raspberry and black currant juices, in which cyanidin-3-sophoroside as well as delphinidin-3-rutinoside and cyanidin-3-rutinoside were the main anthocyanins, respectively. Differences of anthocyanin composition of juices obtained from different berry fruits create the possibility of detecting the adulterations of expensive raspberry and black currant juices with cheap strawberry and red currant juices on the basis of anthocyanin analysis.

PL

W pracy oznaczono skład ilościowy i jakościowy antocyjanów w sokach otrzymanych z trzech odmian truskawek (Senga, Ducat, Marmolada), malin (Beskid, Canby, Malling Seedling), czarnych porzeczek (Ben Lomond, Titania, Ojebyn) i czerwonych porzeczek (Rondom, Jonker, Holenderska) zebranych w trzech kolejnych latach: 1998, 1999 i 2000. Wykorzystano technikę HPLC używając chromatografu Gilson i detektora DAD. Przed analizą antocyjany oczyszczano na minikolumnie Sep – Pak C18 Waters. Wykazano, że badane soki w obrębie gatunków różniły się składem ilościowym i jakościowym antocyjanów. Niezależnie od odmiany, dominującymi antocyjanami w sokach truskawkowych i z czerwonych porzeczek były odpowiednio pelargonidyno-3-glukozyd i cyjanidyno-3-ksylorutynozyd. Obecności tych antocyjanów nie stwierdzono w sokach malinowych i z czarnych porzeczek, w których głównymi antocyjanami były odpowiednio cyjanidyno-3-soforozyd oraz delfinidyno-3-rutynozyd i cyjanidyno-3-rutynozyd. Przypuszcza się, że na podstawie analizy antocyjanów można wykryć zafałszowania drogich soków malinowych i z czarnych porzeczek tanimi sokami truskawkowymi i z czerwonych porzeczek.

20

X-ray fluorescence [XRF] - modern spectrometric method of inorganic quantitative and qualitative environmental analysis

75%

Kondzielski I. , Szymanski T. , Buczkowski R.

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1999

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tom 18