Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Wieczorek, Piotr P." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
APPROACH OF THE STATE PHARMACOPEIA OF UKRAINE TO ANALYTICAL PROCEDURES VALIDATION ON THE EXAMPLE OF CHLORIDE IONS ASSAY IN PERITONEAL DIALYSIS SOLUTIONS
Autorzy:
Hudz, Nataliia
Leontiev, Dmytro
Wieczorek, Piotr P.
Powiązania:
https://bibliotekanauki.pl/articles/895322.pdf
Data publikacji:
2019-08-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
uncertainty
validation
solutions for peritoneal dialysis
chlorides assay
argentometric method
Opis:
The objective of this study was to develop and validate an alternative analytical procedure for the total chloride assay in solutions for peritoneal dialysis (PD). The proposed analytical procedure was validated according to the requirements of the International Conference on Harmonization guideline: Topic ICH Q2(R1) and the approach of the State Pharmacopeia of Ukraine (SPU). The analytical procedure was specific. The linearity of the procedure was evaluated in the concentration range of 76 to 114 mmol/L of chloride ions (80-120 % of the stated content 95 mmol/L) with the regression equation y=1.0029•X-0.2263 and a correlation coefficient of 0.9989. The y-intercept of the regression line did not exceed the maximum permissible value of 2.6. The residual standard deviation (s0=0.65) of the calibration curve met the requirement for max s0 (0.84). The mean recovery was found as 100.07%±0.62 %. The precision study also showed a low value of one-sided 95% confidence limit (∆Z=1.15%) that did not exceed the critical value of 1.6%. The accuracy study also showed that the systematic error had not differed statistically from zero. The developed analytical procedure was also found to be robust and reproducible as contents differences were less 1.6%. The reproducibility studies were conducted with different samples of the same laboratory-made PD solutions in different days and laboratories. The performed studies indicated that the developed analytical procedure is simple, fast and cost-efficient, specific, linear, precise, accurate, and robust. The presented approach could be also applied to the validation of other assay analytical procedures.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 4; 635-643
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie cyklodekstryn w technologii wdrukowania molekularnego
Application of cyclodextrins in molecular imprinting technology
Autorzy:
Pokajewicz, Katarzyna
Poliwoda, Anna
Wieczorek, Piotr P.
Powiązania:
https://bibliotekanauki.pl/articles/2200556.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
cyklodekstryny
polimery z nadrukiem cząsteczkowym
rozpoznanie molekularne
selektywność
cyclodextrins
molecularly imprinted polymers
molecular recognition
selectivity
Opis:
In the last decade molecular imprinted polymers (MIP) have gained great interest in the area of selective recognition various type substances. Scientific work in this field is carried out very intensively - the methods of synthesis are modified and improved, new types of hydride materials are created, as well as new reagents for synthesis. In this case, cyclodextrins (CD) and their analogues show good molecular recognition ability for its unique physical and chemical properties and suitable cavity structure. As a result, these supramolecular ligands can perform various functions in the MIP technology, and the resulting polymeric materials are characterized by high selectivity and binding specificity (recognition) of analytes structurally matched to the MIP cavity. Of particular importance is the fact that cyclodextrins enable the imprinting not only of low-molecular-weight biologically active compounds, but also of high-molecular molecules (proteins, peptides). The numerous hydroxyl groups available in cyclodextrins are active sites that can form different types of linkages. They can be cross-linked with one another, or they can be derivatized to produce monomers that can form linear or branched networks. This article provides a detailed review of MIPs based on CD and their application in the field of separation science and analytical chemistry in recent years. The discussion is grouped according to the different role of CD in MIPs, that is, functional monomer, carrier modifier, etc.
Źródło:
Wiadomości Chemiczne; 2022, 76, 7-8; 677--699
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANALYTICAL PROCEDURE ELABORATION OF TOTAL FLAVONOID CONTENT DETERMINATION AND ANTIMICROBIAL ACTIVITY OF BEE BREAD EXTRACTS
Autorzy:
Hudz, Nataliia
Yezerska, Oksana
Grygorieva, Olga
Brindza, Ján
Felsöciová, Soňa
Kačániová, Miroslava
Wieczorek, Piotr P.
Powiązania:
https://bibliotekanauki.pl/articles/895653.pdf
Data publikacji:
2019-06-28
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
antimicrobial activity
flavonoids
extracts
bee bread
Opis:
SSixteen ethanolic extracts were obtained from seven different bee bread samples. The total flavonoid content in the extracts was determined by aluminium-chloride method and was in the range of 8.3 mg/L±6.24% to 195.3 mg/L±1.35% and 28.8 mg/L±19.33% to 603.3 mg/L±4.64% with reference to quercetin and rutin, respectively. The relative standard deviations (RSD) for parallel measurements for the calibration curves of quercetin dehydrate and rutin trihydrate were in the range of 0.51% to 9.39% and 5.02% to 19.91%, respectively. The RSD for parallel measurements for the extracts with reference to quercetin dihydrate and rutin trihydrate were in the range of 0.23% to 11.64% and 4.64% 19.33%, respectively. The total flavonoid content mainly depended on a ratio of bee bread to 50% ethanol and technology of obtaining bee bread. The significant differences between results were statistically confirmed. The best antibacterial activity of bee bread extracts was found against Bacillus cereus CCM 2010, Clostridium perfringens CCM 4435, and Staphylococcus aureus subsp. aureus CCM 4223. The activity of the bee bread extracts against Gram negative bacteria, Aspergillus and Penicillium genera was lower with moderate anticandidal activity. The obtained results indicated that it was very important to employ extracts with a high content of bee bread in 50% ethanol (1:5, 1:10). According to the results of this study, bee bread is a product which is rich in flavonoids and with good antibacterial activity against Gram positive bacteria and can be considered as a raw material for development of diet supplements and antimicrobial medicinal products
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 439-452
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies