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Tytuł:
Genidentyczność a metafizyka persystencji: endurantyzm, perdurantyzm i eksdurantyzm
Genidentity and the Metaphysics of Persistence: Endurantism, Perdurantism and Exdurantism
Autorzy:
Grygianiec, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/909870.pdf
Data publikacji:
2005-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Tematy:
change
genidentity
persistence
Opis:
The metaphysical explanations of genidentity are very important both for scien-tific researches and for everyday human activities. Endurantism, perdurantism and exdurantism (stage view and point-eventism) are the standard metaphysical theo-ries, which provide descriptions and explanations of relations of change and persistence. The descriptions and explanations in question give simultaneously the truth-conditions for statements about an identity of objects, which persist and undergo changes in time. The main aim of the paper is to formulate the above-mentioned metaphysical stances and to give the general account of the relation of genidentity within a conceptual framework of these theories. The second aim is to provide a suitable reconstruction of criteria of genidentity, which are appropriate for the three metaphysical doctrines.
Źródło:
Filozofia Nauki; 2005, 13, 2; 87-102
1230-6894
2657-5868
Pojawia się w:
Filozofia Nauki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time in Spirituality
Autorzy:
Rybicki, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1043924.pdf
Data publikacji:
2020-12-21
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
spirituality
time
vigil
persistence
Opis:
The article addresses aspects of time in the context of selected aspects of Christian spiritual life. Spirituality is associated with an identification and formation of attitudes, therefore the article is an analysis of some elements of a proper Christian attitude towards time. The first element is a Christian understanding of time as both chronos and kairos. The second dimension of a Christian attitude, defined by the biblical words ‘sleep’ and ‘watch’, relates to watchfulness or vigilance as the best form of spending one’s time. The third aspect of a Christian attitude is based on the three dimensions of time – past, present and future –   in relation to Christian spiritual life. The last part of the article is devoted to perseverance, which is the greatest challenge given to every Christian during the time allotted to them on earth. In the conclusion, the Christian experience of time shows its originality and theologically rooted wisdom.
Źródło:
Verbum Vitae; 2020, 38, 1; 403-417
1644-8561
2451-280X
Pojawia się w:
Verbum Vitae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pairs trading with the persistence-based decomposition model
Autorzy:
Rende, Jonas
Powiązania:
https://bibliotekanauki.pl/articles/108321.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
persistence-based decomposition model
trading
Opis:
Recently, the persistence-based decomposition (PBD) model has been introduced to the scientific community by Rende et al. (2019). It decomposes a spread time series between two securities into three components capturing infinite, finite, and no shock persistence. The authors provide empirical evidence that the model adopts well to noisy high-frequency data in terms of model fitting and prediction. We put the PBD model to test on a large-scale high-frequency pairs trading application, using S&P 500 minute-by-minute data from 1998 to 2016. After accounting for execution limitations (waiting rule, volume constraints, and short-selling fees) the PBD model yields statistically significant and economically meaningful annual returns after transaction costs of 9.16 percent. These returns can only partially be explained by the exposure to common risk. In addition, the model is superior in terms of risk-return metrics. The model performs very well in bear markets. We quantify the impact of execution limitations on risk and return measures by relaxing backtesting restrictions step-by-step. If no restrictions are imposed, we find annual returns after costs of 138.6 percent.
Źródło:
Managerial Economics; 2019, 20, 2; 151-180
1898-1143
Pojawia się w:
Managerial Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender, Stress, Satisfaction, and Persistence: The Complex State of Digital Games as Leisure
Autorzy:
Tomlinson University of California, School of Social Sciences, Christine
Powiązania:
https://bibliotekanauki.pl/articles/2150904.pdf
Data publikacji:
2022
Wydawca:
Univerzita sv. Cyrila a Metoda. Fakulta masmediálnej komunikácie
Tematy:
digital games
gender
persistence
qualitative
stress
Opis:
Digital games have long been investigated for links to negative influences, but they exert a range of impacts on players. A variety of factors can contribute to stressful experiences in play, including game content, player interactions, and gender. This project uses qualitative methods to better understand how players experience and perceive these stressors and why they persist despite them. There are a surprising number of ways that players’ experiences align in spite of gender. Players encounter stress with both design and social experiences, are inclined to “rage quit” if stressors are substantial enough, and are increasingly averse to toxic communities. However, there are also gender-specific experiences. Men are much more concerned with the skillsets of other players, while women worry about their own performance. Further, these experiences of stress complicate our understandings of distress and eustress, with players less motivated by stressors than they are by the anticipated future relief from distress.
Źródło:
Acta Ludologica; 2022, 5, 1; 42-58
2585-8599
Pojawia się w:
Acta Ludologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapowanie obiektowo-relacyjne ORM - czy tylko dobra idea
Autorzy:
Rosiek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/91377.pdf
Data publikacji:
2010
Wydawca:
Warszawska Wyższa Szkoła Informatyki
Tematy:
mapowanie obiektowo-relacyjne
ORM
standard Java Persistence API
JPA
object-relational mapping
Java Persistence API standard
Opis:
Mapowanie obiektowo-relacyjne (ORM) jest nowoczesnym podejściem do zagadnienia współpracy z bazą danych, wykorzystującym filozofię programowania obiektowego. Na wielu forach dyskusyjnych pojawiają się głosy za i przeciw ORM. W artykule omówiona zostanie ogólna koncepcja ORM oraz niektóre elementy jej realizacji w oparciu o standard Java Persistence API (JPA). Podstawowe zalety i wady ORM zostaną przedstawione w oparciu o nie.
Object-relational mapping is a modern approach to the problem of interaction with the database using the objective programming paradigm.There are many views for and against ORM on multiple discussion lists. The article briefly describes a general idea of object-relational mapping and some details of the ORM implementation which uses Java Persistence API (JPA) standard. Basing on this, we will try to point out benefits and disadvantages of the ORM approach.
Źródło:
Zeszyty Naukowe Warszawskiej Wyższej Szkoły Informatyki; 2010, 4, 4; 99-112
1896-396X
2082-8349
Pojawia się w:
Zeszyty Naukowe Warszawskiej Wyższej Szkoły Informatyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Volatility Persistence and Predictability of Squared Returns in GARCH(1,1) Models
Autorzy:
Triacca, Umberto
Powiązania:
https://bibliotekanauki.pl/articles/483247.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
GARCH Models
returns
time series
volatility persistence
Opis:
Volatility persistence is a stylized statistical property of financial time-series data such as exchange rates and stock returns. The purpose of this letter is to investigate the relationship between volatility persistence and predictability of squared returns.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2009, 1, 3; 285-291
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wytrwałość i skuteczność działania: wpływ kontekstu sytuacyjnego i siły woli
Persistence and effectiveness in goal directed activity: The effect of situational context and the strength of will
Autorzy:
Kadzikowska-Wrzosek, Romana
Powiązania:
https://bibliotekanauki.pl/articles/2128442.pdf
Data publikacji:
2019-03-29
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
autonomy
control
strength of will
persistence
effectiveness
Opis:
Zaprezentowane w artykule badanie miało na celu ujawnienie wpływu na wytrwałość i skuteczność działania – z jednej strony – kontekstu sytuacyjnego (kontrola vs autonomia), z drugiej strony – różnic indywidualnych w sprawności mechanizmów kontroli działania – sile woli. Podstawę teoretyczną operacjonalizacji zmiennych niezależnych stanowiły teoria autodeterminacji (Self Determination Theory) Ryana i Deci oraz koncepcja siły woli Kuhla. Uzyskane w badaniu rezultaty (N = 120) potwierdziły interakcyjne oddziaływanie określonych sposobów motywowania (presja vs pozytywne zaangażowanie) oraz różnic w sprawności mechanizmów kontroli działania na przyjęte w badaniu wskaźniki skuteczności i wytrwałości. Osoby zorientowane na stan uzyskały najwyższe rezultaty wytrwałości i skuteczności w warunkach presji, zewnętrznej kontroli. Osoby zorientowane na działanie w mniejszym stopniu podlegają różnicom w sposobie motywowania (kontrola vs autonomia), ale jednocześnie w warunkach nasilenia zarówno presji, jak i pozytywnego oddziaływania wykazały one istotnie niższe wskaźniki wytrwałości i skuteczności. Istotne różnice między osobami zorientowanymi na stan i na działanie ujawniły się w kontekście stwarzającym presję i wzbudzającym poczucie autonomii. W warunkach presji wyższe wyniki w zakresie wytrwałości i zarazem skuteczności uzyskiwały osoby zorientowane na stan, w warunkach autonomii – wyższe wyniki osiągnęły osoby zorientowane na działanie.
The purpose of the present study (N = 120) was to examine whether persistence and effectiveness of goal directed activity depend on situational context (control vs. autonomy support) and individual difference in efficiency of control action mechanisms. The theoretical background for the choice of independent variables included Richard M. Ryan and Edward L. Deci’s Self-Determination Teory and Julius Kuhl’s strength of will conception. The results confirmed the interactional effect of the situational context (control vs. autonomy support) and individual difference in the efficiency of action control mechanisms on persistence and effectiveness. The indexes of persistence and effectiveness were greater for state-oriented participants with externally controlled instructions than for individuals who received autonomy-supportive instructions. Action-oriented participants were less influenced by the specific way of motivating (control vs. autonomy), however, when the effect of the situational context was stronger, action-oriented participants had lower indexes of persistence and effectiveness. In the context of external control, state oriented participants had higher indexes of persistence and effectiveness as compared to action-oriented participants. In the autonomy-support context, action-oriented participants had higher indexes of persistence and effectiveness than state-oriented participants.
Źródło:
Roczniki Psychologiczne; 2011, 14, 2; 159-187
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uporczywość jako znamię wykroczenia skarbowego z art. 57 § 1 k.k.s. – wybrane problemy interpretacyjne i dowodowe
“Tenacity” as a significant factor of fiscal offence from the Article 57, Section 1 of Penal and Fiscal Code – chosen problems for interpretation and evidence
Autorzy:
Marciniak, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/697534.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Opolski
Tematy:
persistence
failure to pay tax on time
Opis:
Article 57(1) of the Fiscal Criminal Code penalises a fiscal misdemeanour that consists in a taxpayer’s persistent failure to pay tax on time. The element of ‘persistence’ is subject to assessment, giving rise to many doubts and controversies. As regards the offences described in Articles 209(1), 218(1a) and 190a(1) of the Criminal Code, an objective-subjective understanding of that element is prevalent, which takes into account the prolonged nature and repeatability of conduct in question, as well as the perpetrator’s special, negative attitude to his obligation. It is emphasised, at the same time, that the persistence element is only established when the perpetrator has an objective possibility to fulfil his obligations. However, in its order of 28 November 2013, the Supreme Court adopted a partly different interpretation of ‘persistence’, according to which it may be indicated not only by the cyclic nature of the conduct, but also by a onetime, but prolonged, omission to pay a tax that is payable on a one-time basis. That interpretation has been criticised by many legal scholars. It is, nevertheless, frequently applied in the practice of the justice system. Following amendments to the Code of Criminal Procedure, introduced by the Act of 27 September 2013 on amending the Code of Criminal Procedure and certain other acts, which came into force on 1 July 2015, evidence is taken, on principle, by the parties, after it is allowed by the division president or the court. The court may allow and take evidence exofficio only in exceptional cases justified by special circumstances. Currently, it is, therefore, the trial parties that are required to prove whether the ‘persistence’ element is present or absent. The amendment of the provisions concerned and the existing case law have induced the author to take up the issue in question.
Źródło:
Opolskie Studia Administracyjno-Prawne; 2016, 14, 1; 59-76
2658-1922
Pojawia się w:
Opolskie Studia Administracyjno-Prawne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Persistent Legacy of the Fallen Empires. Assessing the Effects of Polands Historical Partitions on Contemporary Social Norms Regarding Education
Autorzy:
Herbst, Mikołaj
Powiązania:
https://bibliotekanauki.pl/articles/1965123.pdf
Data publikacji:
2021-11-01
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
norms regarding education
persistence
19th century
Opis:
This paper refers to the historical experience of Poland in order to demonstrate the importance of former institutions on present regional differences in the norms regarding education. Previous studies revealed significant discrepancies between the scholastic achievements of students in different regions in Poland, ones that correspond to the partition of the country by its three neighbours (Austria, Prussia, and Russia), lasting from the late 18th century to the close of WWI. In particular, students in the former Austrian partition perform better than their peers in the two other regions. In this study, a self-designed survey of parents is used to operationalize different kinds of norms regarding education. As it turns out, parents from the region formerly under Austrian rule show more trust in educational institutions, more belief in the formative role of schooling, and less conviction in the material returns from education. The results show that contemporary discussions on the geography of educational achievements need to take into account the broad cultural context of education.
Źródło:
Central European Economic Journal; 2021, 8, 55; 330-351
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of Atpolan 80 EC on atrazine residues in the soil
Autorzy:
Swarcewicz, M.
Skórska, E.
Paździoch, W.
Powiązania:
https://bibliotekanauki.pl/articles/777989.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
atrazyna
adiuwant
gleba
atrazine
adjuvant
persistence
soil
Opis:
The persistence of atrazine residues in soils may have an effect on the contamination of the ground water or surface water. Besides the active ingredients, pesticide formulations contain many other compounds called adjuvants. One of them is the Atpolan 80 EC which belongs to the group of oil mineral adjuvants used as lank-mix. The utilization of a fraction of paraffin oil 1113 is one of the examples of utilising waste as the component of Atpolan 80 EC in agriculture. When the Atpolan concentration comprised 1.25% (v/v), the atrazine degradation rate decreased in the sandy loam and muck soil. The half-life of atrazine increased over a period of 40 or 57 days, depending on the type of the soil. The least significant effect was caused by Atpolan concentration at 0.25 and 0.75%. This result points at the capability of limiting atrazine run-off and leaching down the soil profile. Each ingredient of the pesticide, besides having the overall ability to distribute between different phases, also demonstrates some single compound behaviour. This paper shows our current understanding of the factors that influence the adjuvant performance and their potentially complex interactions with the pesticide.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 3; 5-8
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Income inequality in China 1952-2017: persistence and main determinants
Autorzy:
Skare, Marinko
Gil-Alana, Luis A.
Claudio-Quiroga, Gloria
Pržiklas Družeta, Romina
Powiązania:
https://bibliotekanauki.pl/articles/19233721.pdf
Data publikacji:
2021
Wydawca:
Instytut Badań Gospodarczych
Tematy:
China
income inequality
fractional integration
persistence
economic growth
Opis:
Research background: China's economic growth, however remarkable, is due to the Harrod-Domar nature of economic growth and, therefore, limited. The main limitation lies in the extension of the neoclassical growth model and the government need to decrease regional disparities using new migration, urbanization and social policy. Purpose of the article: It is the rising regional disparity in the total factor productivity to cause the income inequality increase (measured by GINI index) in China from 1952-2017. Our paper brings new insight into the main inequality determinants and causes in China, using a fractional integration modeling framework. Methods: Using fractional integration, we find total factor productivity (TFP), real gross domestic product per capita and growth and expenditures for the social safety net and employment effort to have a statistically significant impact on GINI. Income inequality in China is of a persistent nature with the effects of the shocks affecting the GINI index enduring over time. Findings & value added: The results of this study highlight the importance for model/policy changes by the policy makers and practitioners in China to deal with the inequality issue. This involves improving the growth model through innovation and technological advancement, relaxing TFP dependence on the physical inputs (labor and capital) to reduce income inequality.
Źródło:
Oeconomia Copernicana; 2021, 12, 4; 863-888
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Volition profile of people with physical disability
Autorzy:
Proios, Ioannis
Batsiou, Sophia
Proios, Miltiadis
Powiązania:
https://bibliotekanauki.pl/articles/1923672.pdf
Data publikacji:
2018-08-22
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
persistence
purposefulness
expedience
physical disability
personal and disability characteristics
Opis:
Introduction: Volition is a determinant psychological factor in the improvement of the performance of the human behavior. The aim of the study was to analyze the volitional qualities; persistence, purposefulness and expediency based on personal characteristics and disability-related characteristics. Material and methods: The participants in this study were 140 people with physical disabilities (n=107 men, and n=33 women) while 10 people did not state their gender. Their age ranging from 14 to 67 years. The participants filled the questionnaire Measure Athletes' Volition-Short (MAV-S). In addition following factors were put into analysis: gender, age, family status, education, occupational status, disability [congenital versus acquired], type of disability [spinal cord injury, brain palsy, amputation, poliomyelitis, muscular dystrophy and other type], form of exercise [sport activities - competitive versus recreational - and any activity], type of sport [team versus individual sports], type of experience [resistance, strength and skills], and form of games [Paralympic, European, National and Sectional]). Results: show that the people with physical disabilities who mainly take part in, physical activities manifest a high level volitional qualities (persistence, purposefulness, and expediency). Conclusions: Personal characteristics like form of exercise, type of sport (team, individual) and athletic experience play a moderating role in the existence of individual differences in volitional qualities.
Źródło:
Physical Activity Review; 2018, 6; 151-160
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie wydajności szkieletów programistycznych mapowania obiektowo-relacyjnego dostępnych w języku Java
Comparing the performance of the object-relational mapping programming frameworks available in Java
Autorzy:
Pitera, Jakub Benedykt
Połeć, Mateusz
Kozieł, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2055104.pdf
Data publikacji:
2022
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
Java ORM
Java Persistence API
ocena wydajności
performance evaluation
Opis:
Artykuł poświęcono wykonaniu analizy porównawczej wybranych narzędzi mapowania obiektowo-relacyjnego. Jego celem jest pomoc architektomoprogramowania w określeniu, która z analizowanych bibliotek będzie optymalnym wyborem do użycia w określonym projekcie.Celem artykułu jest ocena bibliotek Hibernate ORM, EclipseLink, Apache OpenJPAoraz DataNucleus pod kątem teoretycznym oraz praktycznym. Każde z badanych narzędzi opisane zostało według kryteriów pozwalających na wyodrębnienie najważniejszych cech mających wpływ na komunikację z relacyjnymi bazami danych. Cechy te następnie zostałyporównane na poziomie praktycznym poprzez zbadanie zachowania aplikacji testowych. Pod względem wydajnościowym, najlepsza okazała się biblioteka Apache OpenJPA, jednak pod względem konfiguracji i dostępności znacznie odstępuje od innych bibliotek. Spowodowane było tonieintuicyjną konfiguracją oraz ubogą dokumentacją technologii. Pod tym względem zdecydowanie górowała biblioteka Hibernate dziękipełnej kompatybilności ze szkieletem programistycznym Spring, intuicyjnej konfiguracji oraz bogatej dokumentacji i wsparcia przez obszerną społeczność korzystających z niej programistów.
The paper concerns a performance evaluation of selected object-relational mapping tools. This work is intended to assist software architects in determining which of the analyzed libraries will be the optimal choice for use in a specific project. The work includes the comparison of Hibernate ORM, EclipseLink, Apache OpenJPA and DataNucleus libraries from the theoretical and practical point of view. Each of the examined tools has been described according to criteria allowing to distinguish the most important features influencing communication with relational databases. These features will then be compared on a practical level by examining the behavior of the test applications. In terms of performance, the Apache OpenJPA library turned out to be the best, but in terms of configuration and availability it significantly differs from other libraries. This was caused by an unintuitive configuration and poor documentation of the technology. In this respect, the Hibernate library definitely dominated thanks to full compatibility with the Spring programming framework, intuitive configuration as well as rich documentation and support by the extensive community of programmers using it.
Źródło:
Journal of Computer Sciences Institute; 2022, 22; 59--65
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A ja zapisywałem siebie” – o Dzienniku Mieczysława Jastruna
Autorzy:
Kosturek, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/650251.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Mieczysław Jastrun, diary, autobiography, notes, consciousness, existence, persistence, time
Opis:
The author of the sketch reads the Diary as a work behind the origin of which there is a sense of disappearance of life in the passing time, typical for Mieczysław Jastrun. In the context, the diary – filled, among others, with a register of small, everyday activities – seems to be a record through which Jastrun attempts to defy the nothingness and preserve his individual existence. The recording of everyday life is, however, not enough to fulfill this task on its own. Formulating remarks on Jastrun’s attempts to record his own existence and consciousness, the author references a text by Georges Gusdorf, in which the French philosopher discusses the goals and assumptions of autobiography, such as: creation of a coherent outline of one’s fortunes, interpretation and understanding of events and experiences of life, discovery of the truth of one’s own personality. Smuga światła [Streak of Light] is surely such a record. The uniqueness of individual consciousness is, however, expressed most fully in Jastrun’s metaphorical images, found not  only in his poetry but also in the Diary and the Streak of Light. The author of the sketch, referencing and juxtaposing specific fragments of Jastrun’s poems, autobiography and diary, reads the meanings and connotations of one of these images – a beautiful woman entering a house – simultaneously showing the coherence of the subject’s  imagination and sensitivity. Tracking of these distinctive images in the poet’s works and decyphering of their meanings resembles exploration of a “self” having a specific identity included in the texts. These images encompass an interpretation of the subject’s existence, express its distinctive metaphysical convictions, whereas their repeatability and permanency constitute the subject’s identity, preserving its existence in the volatile time.
Źródło:
Konteksty Kultury; 2014, 11, 4
2353-1991
Pojawia się w:
Konteksty Kultury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficacy of electrospun bionanofibers as fumigant pesticides in foodstuff storage
Autorzy:
Allahvaisi, Somaye
Talebi Jahromi, Khalil
Imani, Sohrab
Khanjani, Mohammad
Powiązania:
https://bibliotekanauki.pl/articles/961635.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fumigant toxicity
nanofi ber
persistence
plodia interpunctella
storage pests
Opis:
Essential oils as alternative synthetic pesticides for pest management of foodstuffs have recently received increased attention. Controlled and slow release formulations of essential oils are used to enhance their efficiency. Two volatile essential oils of Mentha piperita L. and Salvia officinalis L. were investigated for release rate and mortality percentage by fumigant toxicity against 1st instar larvae of Plodia interpunctella. Electrospinning was used to incorporate various concentrations of essential oils in nanofibers. Th e essential oils can be released from the nanofibers for long periods of time, from several days to several weeks. Poly(lactic acid) was used as a green polymer carrier and the essential oils were incorporated into the nanofi bers (8–15v/v% PLA). Insecticidal bioassay revealed that oil-loaded nanofibers (NFOs) were more toxic than pure essential oils (PEOs) against tested larvae. Th e LC50 and LT50 of NFOs were 1.2 and 4 times, respectively, more than PEOs. Our results indicated that PEOs completely lost their insecticidal activity after 14 days, whereas at the same period, NFOs had an average of 93% mortality when applied against P. interpunctella. Therefore, it can be concluded that nanofibers improved the persistence of the oil. This study presents S. officinalis has more toxicity and M. piperita had more persistence for controlling the larvae of indian meal moth.
Źródło:
Journal of Plant Protection Research; 2017, 57, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 61

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