Temat: NPS - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Bimetallic nanocatalysts supported on graphitic carbon nitride for sustainable energy development: the shape-structure–activity relation
Autorzy:: Kuna, Ewelina
Pieta, Piotr
Mrdenovic, Dusan
Stefanowicz-Pieta, Izabela
Jönsson-Niedziółka, Martin
Wydawca:: Royal Society of Chemistry
Cytata wydawnicza:: Nanoscale Adv., 2021,3, 1342-1351
Opis:: The present research was financially supported by: (i) the Polish National Agency for Academic Exchange (NAWA) trough Bekker grants PPN/BEK/2019/1/00348 “C1–C4 alkanes to oxygenated fuel electrochemical transformation” and (ii) PPN/BEK/2019/1/00345 “Nanostructured carbon-based materials doped with metal nanoparticles as catalytic electrode materials for CO2 electroreduction with the use of surface-plasmon enhancement” and (iii) the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie co-financed by the Ministry of Science and Higher Education (H2020-MSCA-COFUND-2018 grant agreement No. 847413). The research activity of D. M. was supported by funds from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 711859 and by financial resources for science in the years 2017–2021 awarded by the Polish Ministry of Science and Higher Education for the implementation of an international co-financed project.
The catalytic performance of metal nanoparticles (NPs), including activity, selectivity, and durability, depends on their shape and structure at the molecular level. Consequently, metal NPs of different size and shape, e.g., nanobelts, nanocubes, nanoflakes, and nanowires, demonstrate different reactivity and provide different reaction rates depending on the facet exposed. In this context, the present review aims to summarize the shape-structure–activity relation of metallic nanocatalysts. Moreover, keeping in mind that the application of noble metal catalysts is expensive, we would like to draw the reader's attention to bimetallic nanocatalysts supported on graphitic carbon nitride. One of the advantages of these systems is the possibility to minimize the use of noble metals by introducing another metal either to the parent NPs and/or modifying the support materials. The development and optimization of bimetallic nanocatalysts might provide the new class of materials with superior, tunable performance, thermal stability and reduced costs compared to presently available commercial catalysts. Therefore, further application of these bimetallic composites for sustainable development in energy, green chemicals/fuels and environmental protection will be discussed.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Effect of Magnetite Oxide Nanoparticles and Tungsten Oxide Nanoparticles on Phosphate Removal from Aqueous Solutions
Autorzy:: EL-Baz, Amro
Mokhtar, Mona
Abdo, Ahmed
Tematy:: phosphate removal
nanoparticles
Fe3O4 NPs
WO3 NPs
adsorption
desorption; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/24201790.pdf Link otwiera się w nowym oknie
Opis:: Phosphate (P) removal from aqueous solutions were studied by a new mineral adsorbent, tungsten (VI) oxide (WO3) nanoparticles (NPs), which has not been the subject of much research in the field of removing P contaminants from agricultural wastewater. In this paper, P was removed from aqueous solutions by a new mineral adsorbent, WO3 NPs and it was compared with magnetite (iron IV) oxide (Fe3O4) nanoparticles (NPs) under the same ambient operating conditions i.e., The influence of the dosage of adsorbents, initial P concentration, contact time, pH and temperature. The values that achieved the best removal were recorded. It was concluded that the best limits for pH were at 2–3, contact time at 40 minutes, temperature at 45 °C and adsorbent dose at 1.0 g/L. Best results of the variables were applied on samples of real agricultural wastewater, which achieved removal ratio of 77.3% and 75.42% for Fe3O4 and WO3 NPs, respectively. SEM, EDX and FTIR images and analyses were conducted to describe the characteristics of nano-adsorbents used before and after P adsorption in aqueous solutions. The P adsorption kinetics for aqueous solutions were examined by fitting results of the experiment to both the first & second pseudo-kinetically models. The outcome indicated that kinematic data fit better with pseudo-second-order kinetic models. Moreover, the information captured from equilibrium adsorption was analyzed using isothermal methods (by Langmuir & Freundlich Forms). Their results showed that the Freundlich form is considered more suitable than Langmuir form in analyzing the biosorption of P ions. The thermodynamic demeanor of P adsorption by Fe3O4 and WO3 NPs was analyzed and evaluated, and the thermodynamic data analyses confirmed the process of P adsorption was spontaneous. The ΔG° value was negative, while ΔH° and ΔS° values found to be positive, which means that the adsorption of P was a spontaneous, random and endothermic operation. In general, Fe3O4 and WO3 nanoparticles had a high efficiency in removing phosphate from water. In addition, WO3 NPs has been identified as one of the most promising adsorbents due to its rapid and effective adsorption of pollutants.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 3.

Tytuł:: Assessment of satisfaction and loyalty of mass event participants as exemplified by XXIII Rzeszow Juwenalia
Autorzy:: Woźniak, Joanna
Wydawca:: Wyższa Szkoła Biznesu National-Louis University w Nowym Sączu
Cytata wydawnicza:: Woźniak J., Assessment of satisfaction and loyalty of mass event participants as exemplified by XXIII Rzeszow Juwenalia [in:] Business and non-profit organizations facing increased competition and growing customers’ Demands: Foundation “Cognitione”, eds. A. Ujwary-Gil, A. Nalepka, Nowy Targ and WSB-NLU, Vol. 16, Nowy Sącz 2017, p. 455–465.
Opis:: In the literature of the subject, the issues relevant to customer satisfaction research are raised quite frequently in the context of products or services having a commercial character, all the time, notwithstanding, there is a lack of research within the scope of the quality and innovativeness of mass events. Taking that under consideration, the authoress is going to raise, in this publication, the issues of customer loyalty making a reference to quite a specific product which is constituted by Rzeszow Juwenalia. Rzeszow Juwenalia is considered to be one of the largest free-entry student events organized in Poland. The three days of concerts, intertwined with competitions, and also with numerous attractions, make more than 25 thousand of participants stay on the venue of the event every single day (on average). Taking under consideration the number of individuals that participate in the event being analysed, it is legitimate to conduct the measurement of customer contentment, satisfaction and loyalty. In connection with this, it was the objective of this publication was to determine the degree of loyalty of participants in the event. Striving to attain the adopted objective, and also to verify the formulated hypothesis, in February, 2017, a survey research, made accessible in the Google form, was conducted. The respondents were requested to provide their responses to the following question: 'How high is the probability of you recommending Rzeszow Juwenalia to your acquaintances?' The question was formulated upon the basis of eleven-point scale, on which using the digit '0' means: 'Without any doubt, I will not recommend the event', whereas using the digit '10' means: 'I will recommend the event without any doubt.' The questionnaire contained respondent’s particulars as well. In that section, respondents were requested to provide the information about their gender. For the purpose of the analysis of data, the STATISTICA 12 program was applied. In the statistical analysis, it was principally tables of numerousness, with the application of which the numerical collation, as well as the per cent one, of particular responses, were presented. To attain the objective of verification the hypothesis, the ANOVA Kruskal-Wallis test by ranks was applied. The processed results were presented in the graphical form. Upon the basis of the conducted research, it was ascertained that the vast majority of participants in Rzeszow Juwenalia was content with the organization of the event in question. In addition to that, 70.13 % of them promote this event in their environments. The obtained results of research made it possible as well to verify the adopted research hypothesis, and to ascertained that there is, most likely, not existing correlation between gender and inclination for the part of the participants in Rzeszow Juwenalia towards promoting the event amongst their acquaintances. Both women, and also men alike, assess the organization of Rzeszow Juwenalia in a similar way, and express willingness to advertise this event amongst their acquaintances.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

Artykuł

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Skocz do pozycji: 4.

Tytuł:: Impact of Salinity Stress and ZnO-NPs on Macro and Micronutrient Assimilation: Unraveling the Link between Environmental Factors and Nutrient Uptake
Autorzy:: Singh, Abhishek
Sengar, Rakesh Singh
Rajput, Vishnu D.
Al-Ghzawi, Abdul Latief
Shahi, Uday Pratap
Ghazaryan, Karen
Minkina, Tatiana
Al Tawaha, Abdel Rahman Mohammad
Al Zoubi, Omar Mahmoud
Habeeb, Talaat
Tematy:: salinity stress
macronutrient
micronutrient
ZnO-NPs
rice; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59114201.pdf Link otwiera się w nowym oknie
Opis:: The purpose of this experiment was to investigate the effects of salinity (NaCl) on the mineral composition and macro- and micronutrient contents of rice plants. The experiment was conducted at the Department of Biotechnology’s experimental area in SVPUAT Meerut. Various salinity treatments were applied, including T0 (Control), T1 (60 mM NaCl), T2 (80 mM NaCl), T3 (100 mM NaCl), T4 (ZnO NPs 50 mg/L + 60 mM NaCl), T5 (ZnO NPs 50 mg/L + 80 mM NaCl), and T6 (ZnO NPs 50 mg/L + 100 mM NaCl). The results analysis revealed that the micro- and micronutrients in rice genotypes decreased compared to the control treatment. However, when 50 mg/L of ZnO-NPs were applied, the concentrations of both macro- and micronutrient contents in rice plants were found to increase. This is the most significant finding of this research.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 5.

Autorzy:: Krzemień, Izabela
Stankowicz, Hubert
Gawlik, Maciej
Opis:: The aim of this article was to present the most important aspects of the modern application of metabolomics in toxicological analysis. Information contained herein comes from works that have appeared in recent years in specialist periodicals and publications devoted to the discussed issue. The first part of the work defines metabolomics, outlines its main area of interest and distinguishes it from other ”omics”. Afterwards, two strategies in metabolomics research are described: targeted, which is characterized by the quantification and qualitative determination of a specific, selected pool of 50 to 500 metabolites, and non-targeted, which measures all metabolites present in the sample, which is referred to as the “metabolomic fingerprint”. The course of a standard metabolome analysis is also presented, with an emphasis on the techniques of sample preparation and analyte determination, as well as proper selection of the method for the tested material. The following part of the article discusses selected studies related to the use of metabolomics in the diagnosis of drug use and in the assessment of drug toxicity. The article discuses experiences related to new biomarkers, such as GHB metabolites, which can extend the diagnostic window of this substance, and compounds whose absence in the urine indicates adulteration and manipulation of this material. It also highlights the efforts of scientists in the development of a predictive model enabling the prediction of pharmacological profiles of NPS, as well as research to deepen the knowledge of the metabolism and pathological effects of psychoactive substances, including cocaine and methamphetamine. The final part of the work is devoted to the use of thanatometabolomics in forensic post mortem toxicological analysis and the latest reports describing attempts to use metabolomics in computer-aided toxicological predictive analysis. This review highlights new application opportunities for metabolomics and its current struggles with practical application in the field.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Photocatalytic degradation of ampicillin using silver nanoparticles biosynthesised by Pleurotus ostreatus
Autorzy:: Jassal, P.S.
Khajuria, R.
Sharma, R.
Debnath, P.
Verma, S.
Johnson, A.
Kumar, S.
Tematy:: ampicillin
FTIR
photocatalysis
silver nanoparticles (Ag-NPs)
TEM; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2096973.pdf Link otwiera się w nowym oknie
Opis:: The past few decades have witnessed a tremendous increase in the consumption of antibiotics worldwide. This rampant and unregulated use of antibiotics and their improper disposal has led to the accumulation of these drugs in the environment. This in turn has led to the emergence of antibiotic resistance in microbes and has become one of the most pressing global concerns in medicine, with highly resistant pathogens of many species proving difficult to treat. The aim of the study was to synthesise silver nanoparticles (Ag-NPs) using white rot fungus, Pleurotus ostreatus and assess its potential to carry out photocatalytic degradation of ampicillin. UV–Vis spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscope have been used to characterize biosynthesized Ag-NPs. The photocatalytic degradation of ampicillin in aqueous solution by Ag-NPs was evaluated under natural sunlight. The effect of the operating conditions (contact time, Ag-NP concentration and initial ampicillin concentration) on the photocatalytic degradation was also investigated. The highest ampicillin degradation of 96.5% was observed after exposure of the solution (antibiotic + nanoparticles) for 4 h in sunlight. The maximum degradation was observed at an Ag-NP concentration of 5 ppm at pH 6. To the best of our knowledge, photocatalytic degradation of ampicillin using Ag-NPs synthesised by P. ostreatus has not been reported earlier.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Metody oceny efektywności działań przedsiębiorstwa na rzecz konsumenta na przykładzie przedsiębiorstw innowacyjnych
Autorzy:: Abramczyk, Damian
Tematy:: jakość
satysfakcja
zadowolenie
produkt
usługa
klient
metoda NPS
badanie
ankieta
wywiad
quality
satisfaction
contentment
product
service
customer
method NPS
survey
interview; Pokaż więcej
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:: https://bibliotekanauki.pl/articles/1022916.pdf Link otwiera się w nowym oknie
Opis:: Konsument dąży do tego by posiadać coraz więcej, poprzez wydatkowanie dochodu pozyskanego z różnych źródeł. Ten chce mieć więcej, niż mniej. Przedsiębiorstwa, chcąc sprostać oczekiwaniom klienta, produkują dobra, od jakości których zależy przyszły wynik finansowy przedsiębiorstwa. Klient, nabywając dobra od producenta oczekuje możliwie najwyższej jakości produktów, przy założeniu przeciętnego pułapu cenowego, dopasowanego względem jego preferencji oraz możliwości finansowych. Zdarzyć się może sytuacja, kiedy klient nie będzie zadowolony z usługi bądź produktu. Zdarzenie to wywołuje niekorzystny efekt na przedsiębiorstwo. Celem optymalizacji tego zjawiska niezbędne jest podjęcie działań zapobiegawczych, które prawie zawsze poprzedzone są wnikliwym badaniem i analizą. W poniższym artykule przedstawione będą wybrane przez autora metody pozyskania informacji o stopniu zadowolenia (satysfakcji) klienta z nabytych przez niego dóbr. Przytoczone zostaną argumenty społeczne oraz psychologiczne, mające wpływ na końcowy poziom satysfakcji klienta. Wskazane zostaną również skutki dla przedsiębiorstwa, związane z wynikami badania stopnia satysfakcji klienta.
The consumer strives to own more and more by spending income obtained from various sources. This one wants more than less. Enterprises, wanting to meet the client's expectations, produce goods which determine the quality of the company's future financial results. When purchasing goods from a manufacturer, the customer expects the highest possible quality products, assuming an average price level, adjusted to his preferences and financial possibilities. There may be times when the customer is not satisfied with the service or product. This event has an adverse effect on the company. In order to optimize this phenomenon, it is necessary to take preventive measures, which are almost always preceded by thorough research and analysis. The following article will present the methods of obtaining information on the degree of customer satisfaction with the goods purchased by the author, selected by the author. Social and psychological arguments that affect the final level of customer satisfaction will be presented. The consequences for the enterprise, related to the results of the customer satisfaction survey, will also be indicated.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Impact of Zinc Oxide Nanoparticles on Seed Germination Characteristics in Rice (Oryza sativa L.) Under Salinity Stress
Autorzy:: Singh, Abhishek
Sengar, Rakesh Singh
Rajput, Vishnu D.
Agrawal, Shreni
Ghazaryan, Karen
Minkina, Tatiana
Al Tawaha, Abdel Rahman Mohammad
Al Zoubi, Omar Mahmoud
Habeeb, Talaat
Tematy:: nanoparticle
salinity
Kargi
CSR 30
germination
rice
ZnO-NPs; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59113429.pdf Link otwiera się w nowym oknie
Opis:: An exciting new window of opportunity has opened up for environmentally responsible farming with the advent of the nanotechnology era: the role of nanoparticles (NPs) to mitigate abiotic stresses. NPs have unique physiochemical characteristics that make them an attractive study subject. Rice growth and yield are severely inhibited by salinity, a major detrimental abiotic factor. However, the impact of NPs on rice seeds germination characteristics and physio-biochemical phenomena under salt stress conditions remains poorly understood. Accordingly, we intended to look at how zinc oxide nanoparticles (ZnO-NPs) affected germination processes and the early seedling stage while the rice plants (Kargi and CSR 30 rice genotypes) were put under salinity stress. Different germination characteristics parameters were considered, e.g., germination percentage (GP) relative seed germination rate (RGR), and seed vigour index (SVI) determined after eight days of treatment with ZnO-NPs at a concentration of 50 mg/L on rice seed. After passing the germination test, the seeds were placed in Hoagland hydroponic solution and given another week of ZnO-NPs treatment to evaluate the seedling growth and phyto-biochemical characteristics, such as shoot height and root length, inhibition percentage of shoot height and root length, chlorophyll and carotenoid stability index, chlorophyll and carotenoid inhibition percentage, malondialdehyde (MAD) content and antioxidant enzymatic activities (SOD, APX).This investigation demonstrated that 50 mg/L ZnO-NPs have the potential to alleviate the effect of salt stress on rice genotypes during the germination stage.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Development and validation of a method for qualitative analysis of new psychoactive substances using an ion source for thermal extraction and a triple quadrupole mass spectrometer.
Opracowanie i walidacja metody analizy jakościowej nowych substancji psychoaktwnych z zastosowaniem źródła jonów do ekstrakcji termicznej i spektrometru mas typu potrójny kwadrupol.
Autorzy:: Wierzbicki, Paweł
Opis:: Niniejsza praca dotyczy opracowania szybkiej i prostej metody identyfikacji nowych substancji psychoaktywnych z zastosowaniem źródła jonów do ekstrakcji termicznej i spektrometru mas typu potrójny kwadrupol firmy SCIEX Triple Quad 3500. Celem pracy było określenie odpowiednich parametrów do badania NPS przy zastosowaniu ekstrakcji termicznej; walidacji opracowanej metody oraz dobraniu odpowiedniej matrycy wykorzystywanej w czasie prowadzenia badań. W czasie badań skupiono się na ośmiu związkach jakim były: N-etylokatynon, 3-MMC, UR-114, XLR-11, alfa-PVP, 5MEO-MIPT, 5F AKB 48, MDPBP. Sporządzono roztwory o stężeniu 10 µg/ml poprzez odpowiednie rozcieńczenie roztworów wzorcowych. Pomiary wykonano za pomocą spektrometru mas firmy SCIEX model Triple Quad 3500 połączonego ze źródłem do ekstrakcji termicznej (ang. thermal extraction ion source). Wybraną temperatura do prowadzenia badań było 230⁰C. Dokonywano nastrzyku w ręczny sposób co 10 sekund w celu zapewnienia prawidłowej rejestracji sygnału na chromatogramie. Zdefiniowano metodę w opragramowaniu ,,Analyst”, które sterowało urządzeniem oraz zbierało wyniki w postaci chromatogramów. Pozwalało to na monitorowanie analizy w czasie rzeczywistym. Pierwszym etapem opracowania metody analitycznej było zdefiniowanie bazy danych wykrywanych analitów. Następnie określone zostały parametry metody analitycznej. Czas pomiaru ustalono na 1,015 min. W specyfikacji spektrometru mas określono między innymi tryb pomiaru, którym był pomiar MRM. Określono również parametry spektrometru mas i źródła jonów m.in. przepływ gazu osłonowego ustawiony na 20,0 psi oraz gazu kolizyjnego wynoszący 8 psi. Pozostałe parametry to napięcie IonSprayu wynoszące 4500 V, gdzie gaz pierwszy był ustawiony na 20,0 psi oraz drugi na 10,0 psi. Temperatura grzejnika interferencyjnego wynosiła 150⁰C. W pierwszej kolejności sprawdzono użyteczność desorbera termicznego w badaniach NPS. Niezbędne okazały się testy zarówno sposobu wprowadzania próbki do źródła jonów jak i materiału, na którym dana próbka zostanie wprowadzona. Konieczne było wstępne określenie selektywności metody analitycznej względem badanych analitów oraz wykluczenie występowania potencjalnych przeniesień. Metodą prób i błędów została dobrana odpowiednia energia kolizji i temperatura źródła jonów.Kluczowym etapem prowadzonych badań było sprawdzenie i potwierdzenie wiarygodności uzyskiwanych wyników. W tym celu wykonano walidację metody analitycznej, pozwalającej na stosowanie desorpcji termicznej połączonej z tandemową spektrometrią mas do szybkiego badania nowych substancji psychoaktywnych pod względem jakościowym. Zdecydowano, że w toku walidacji metody weryfikacji zostaną poddane trzy parametry zakłócenia – wpływ interferentów, przeniesienie oraz LOD . Uzyskano zgodność chromatogramów z bazą danych zaprogramowaną w programie ,,Analyst”. Opracowana w ramach niniejszej pracy metoda pozwoliła na szybką, wynoszącą zaledwie jedną minutę analizę przesiewową różnych grup dopalaczy. Do największych wad opracowanej metody należy zaliczyć konieczność dokonywania ręcznego nastrzyku próbek.Wykazano, że opracowana metoda charakteryzuje się wystarczającą selektywnością wymaganą do analiz jakościowych substancji psychoaktywnych zabezpieczanych z rynku narkotykowego. Metoda ta jest znacznie bardziej wiarygodna niż tzw. testy barwne, które służą do wstępnej klasyfikacji NPS. Wykonane badania były wstępem do wykorzystania opracowanej metody do badania próbek rzeczywistych, zabezpieczonych w ramach postępowań przygotowawczych z rynku narkotykowego przez organy ścigania i jednostki sanitarno-epidemiologicznej.
The present work concerns the development of a fast and simple method for the identification of new psychoactive substances using an ion source for thermal extraction and a SCIEX Triple Quad 3500 triple quadrupole mass spectrometer. The purpose of the work was to determine suitable parameters for the study of NPS using thermal extraction; to validate the developed method and to select a suitable matrix used during the study. The study focused on eight compounds which were N-ethylcathinone, 3-MMC, UR-114, XLR-11, alpha-PVP, 5MEO-MIPT, 5F AKB 48, MDPBP. Solutions of 10 µg/ml were prepared by diluting the standard solutions accordingly. Measurements were performed using a SCIEX model Triple Quad 3500 mass spectrometer connected to a thermal extraction ion source. The chosen temperature for conducting the experiments was 230⁰C. Injections were performed manually every 10 seconds to ensure proper signal registration on the chromatogram. The method was defined in the opragram , "Analyst", which controlled the device and collected the results in the form of chromatograms. This allowed real-time monitoring of the analysis. The first step in the development of the analytical method was to define the database of analytes to be detected. Then the parameters of the analytical method were defined. The measurement time was set at 1,015 minutes. Among other things, the mass spectrometer specification specified the measurement mode, which was MRM.The parameters of the mass spectrometer and ion source were also determined, including a shielding gas flow set at 20.0 psi and a collision gas of 8 psi. Other parameters included an IonSpray voltage of 4,500 V, where the first gas was set at 20.0 psi and the second at 10.0 psi. The temperature of the interference heater was 150⁰C. As a first step, the utility of the thermal desorber was tested in NPS studies. It was necessary to test both the method of introducing the sample into the ion source and the material on which the sample would be introduced. It was necessary to predetermine the selectivity of the analytical method with respect to the analytes under study and to exclude the occurrence of potential carryovers. By trial and error, the appropriate collision energy and temperature of the ion source were selected.A key step in the ongoing research was to check and confirm the reliability of the results obtained. To this end, validation of the analytical method was performed, allowing the use of thermal desorption combined with tandem mass spectrometry for the rapid qualitative testing of new psychoactive substances. It was decided that in the course of validating the method, three interference parameters - the influence of interferents, carryover and LOD - would be verified. The compatibility of the chromatograms with the database programmed in the ,,Analyst" program was obtained. The method developed as part of this work allowed for a rapid screening analysis of only one minute for different groups of boosters. The biggest disadvantages of the developed method include the need for manual injection of samples.It was shown that the developed method has sufficient selectivity required for qualitative analysis of psychoactive substances secured from the drug market. The method is much more reliable than the so-called color tests, which are used for preliminary classification of NPS. The performed tests were a prelude to the use of the developed method for the examination of real samples secured in the framework of pre-trial investigations from the drug market by law enforcement and sanitary-epidemiological units.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

na półce

Skocz do pozycji: 10.

Tytuł:: Oczekiwanie w długim horyzoncie czasu trendy zmiany sposobu wykorzystania zasobów regulacyjnych do dobowego bilansowania krajowego systemu krajowego elektroenergetycznego
Expected long-term trends of use the regulatory resources for daily system balancing
Autorzy:: Czarnecki, B.
Tematy:: diurnal NPS balancing
stochastic modeling
bilansowanie systemu
modelowanie stochastyczne; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Powiązania:: https://bibliotekanauki.pl/articles/268978.pdf Link otwiera się w nowym oknie
Opis:: W artykule omówiono wyniki stochastycznego modelowania warunków dobowego bilansowania KSE w warunkach wzrostu mocy zainstalowanej źródeł OZE. Wskazano na rosnącą rolę zasobów regulacji mocy czynnej, w szczególności oczekiwany wzrost wykorzystania elektrowni szczytowo-pompowych i roli pracy pompowej dla zapewnienia bezpieczeństwa i niezawodności pracy KSE. Wskazano również na możliwe konsekwencje wzrastającej mocy zainstalowanej OZE w postaci konieczności ograniczania mocy oddawanej przez nie do sieci ze względu na bezpieczeństwo i niezawodność prowadzenia ruchu KSE oraz na możliwość obniżenia długookresowej dyspozycyjności jednostek wytwórczych centralnie dysponowanych ze względu na rosnącą liczbę odstawień i uruchomień w cyklu dobowym.
The article discusses the results of stochastic modeling of daily system balancing the conditions in the scenario of increase renewable energy sources installed capacity. The results of the simulation show the increasing role of active power regulation, in particular the expected increase in the use of pumped storage and the role of the pump to ensure the safety and reliability of the NPS. Results also indicates the possible consequences of increased installed capacity of renewable energy sources in the terms of need to curtail the their output due to the safety and NPS reliability reasons.
Dostawca treści:: Biblioteka Nauki

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