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Wyświetlanie 1-10 z 27
Tytuł:
Evaluation of hydrophilic globules with sodium alginate containing a lactic acid– chitosan complex
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2131517.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
hydrophilic globules
lactic acid-chitosan complex
physiological environment of vagina
vaginal mucosa
vaginal infections
Opis:
An important issue in the treatment of vaginitis is the amount of time the drug remains on the vaginal mucosa. If the contact time is too short, the drug cannot work effectively to ensure the correct pH in the vaginal environment. This study evaluated formulations of globules containing sodium alginate, lactic acid and chitosan with different pH and rheological properties. The experimental studies revealed that it is possible to produce a preparation with optimal pharmaceutical and application properties. The use of an appropriate ratio of lactic acid to chitosan in the complex and the appropriate concentration of sodium alginate produces a preparation with excellent properties to coat the surface of the vaginal mucosa.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2021, 26; 170-177
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of chitosan on the properties of gels protecting of the esophageal mucosa
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034174.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
esophageal infections.
esophageal mucosa
gastro-esophageal reflux
hydrophilic gels
physiological environment of gastro-esophageal
Opis:
Gastro-esophageal reflux is a term that defines the reverse flow of acid gastric contents into the esophagus. On the other hand, alkaline reflux occurs in the case when alkaline intestinal contents enter the esophagus. The aim of the study was to examine the pharmaceutical properties of gels for the treatment of gastro-esophageal reflux, covering the mucosa, allowing prolonged contact with the esophageal mucosa. Formulations containing the PVP K-30 showed the lowest pH, which is an important feature and can be used in the treatment of advanced alkaline reflux. Gels containing PVP K-90 and chitosan can be used in the treatment of acid reflux. The addition of chitosan significantly increased the dynamic viscosity of the tested gels. The study of the work of adhesion showed the effect of PVP K-30 and PVP K-90 and their concentration on the value of the work of adhesion. The presented studies have shown that it is possible to obtain gels with high adhesion to the esophageal mucous membrane.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2019, 24; 135-144
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pharmaceutical assessment of gynaecological powders with sodium alginate containing a lactic acid-chitosan complex
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034359.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
hydrophilic powders
lactic acid complexed with chitosan
physiological environment of the vagina
vaginal infections.
vaginal mucosa
Opis:
The insufficient duration of the drug’s contact with the vaginal mucosa does not provide adequate pH, conditioning the physiological biocenosis of the organ. This effect is hampered by numerous anatomic and physiological conditions which do not facilitate prolonged contact of the drug with the application site. This study has shown the impact of the used excipients and the ratio of lactic acid to chitosan on pH, dynamic viscosity and adhesiveness of methylcellulose gels obtained from powders. The addition of sodium alginate and excipients to these complexes allows various formulations to be obtained over a wide range of pH. Rheological investigations revealed an increase in the dynamic viscosity of preparations containing lactic acid complexed with chitosan and sodium alginate in comparison to gels without sodium alginate. Studies of the work of adhesion showed the effect of glycerol, 1,2-propylene glycol and their concentrations on the value of the work of adhesion.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2018, 23; 130-139
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of dextran in gynecological powders containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034634.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
hydrophilic powders
lactic acid complexed with chitosan
physiological environment of vagina
vaginal infections
vaginal mucosa
Opis:
Powders for gynecological use pass under natural conditions in gels covering the vaginal mucosa. This study has shown the impact of used excipients and the ratio of lactic acid to chitosan on pH, dynamic viscosity and adhesiveness of methylcellulose gels obtained from powders. All gels with complexes in the ratios of 1:1 and 2:1 (lactic acid:chitosan) showed a pH in the physiological range 3.5-5.0 at 37°C. The addition of dextran and excipients to these complexes allows various formulations over a wide range of pH to be obtained. Rheological investigations revealed an increase in the dynamic viscosity of preparations containing lactic acid complexed with chitosan and dextran in comparison to gels without dextran. Studies of the work of adhesion showed the effect of glycerol, 1,2-propylene glycol and their concentrations on the value of the work of adhesion. The presented work shows that it is possible to obtain gels with high adhesion properties to vaginal mucous membrane.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 143-150
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of pharmaceutical properties of thermosensitive gynecological powders containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034637.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
lactic acid complexed with chitosan
physiological environment of vagina
thermosensitive hydrophilic powders
vaginal infections.
vaginal mucosa
Opis:
pH of gels ranged from 3.92 to 4.44 for gels 1:1 and from 2.36 to 2.84 for 8:1 ratio. The addition of 20%, 23% or 25% poloxamer 407 increases the pH ranged from 4.00 to 4.91 for gels with 1:1 ratio and from 2.56 to 3.42 for 8:1 ratio. Rheological studies demonstrated that the investigated gels obtained from powders have the dynamic viscosity ranged from 53 mPa*s to 398 mPa*s for the 1:1 stoichiometric ratio in the complex and from 19 mPa*s to 242 mPa*s for 8:1 ratio. The addition of calcium alginate with polyoxyethylene glycol-200 reduces the pH and maintains high dynamic viscosity. The thermosensitive gels obtained from thermosensitive powders shows high adhesion and are difficult to separate from the probe.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 160-164
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The properties of thermosensitive gynecological powders containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034802.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
lactic acid complexed with chitosan
physiological environment of vagina
thermosensitive hydrophilic powders passing gels
vaginal infections
vaginal mucosa
Opis:
The investigations showed that the addition of a 20%, 23% and 25% poloxamer 407 increases the adhesive properties of the investigated powders, but at the same time it increases their pH. The enrichment of the composition of the tested powders containing 5% glycerol and 5% 1,2-propylene glycol resulted in increased pH of the formulations. A modification of the composition of the tested powders containing 5% glycerol and 5% 1,2-propylene glycol has increased the range of the dynamic viscosity of formulations. The enrichment of the composition of the tested powders containing 5% hydroxypropylmethylcellulose resulted in increased the range of the dynamic viscosity and decreased pH of the formulations. Laboratory tests have shown that it is possible to obtain thermosensitive gels with high adhesion properties to vaginal mucous membrane.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 183-194
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of pharmaceutical properties of hydrophilic powders containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035180.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
hydrophilic powders passing gels
lactic acid complexed with chitosan
physiological environment of vagina
vaginal infections
vaginal mucosa
Opis:
Hydrophilic powders passing gels containing lactic acid complexed with chitosan at a stoichiometric ratio of 1:1 and 8:1 revealed pH ranged from 3.92 to 4.44 and 2.36 to 2.84. Rheological studies demonstrated that the research gels obtained from powders possess the dynamic viscosity ranging from 53 to 398 mPa.s for the 1:1 stoichiometric ratio in the complex and from 19 to 242 mPa.s for the 8:1 ratio. As a result of the research, preparations with different pH values, including physiological range, were obtained. Powders show that the adhesion of the gel covering the surface of the apparatus simulates the conditions in the vagina. The gels obtained from the powders were characterised by the specific dynamic viscosity and possess the work of adhesion. The results obtained in the experimental studies proved that it is possible to produce a preparation with optimal pharmaceutical and application properties.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 79-85
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pharmaceutical assessment of gynaecological powders with the addition of hydrophilising substances containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035187.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs
hydrophilic powders passing gels
lactic acid complexed with chitosan
physiological environment of vagina
vaginal infections
vaginal mucosa
Opis:
Research on gynaecological preparations followed that of optimising their pharmaceutical properties, which is beneficial for gynaecological powders. Gels obtained from powders containing lactic acid complexed with chitosan revealed a stoichiometric ratio 1:1, 2;1, 3:1, 4:1 and 8:1. Their pH ranged from 3.92 to 4.44 for 1:1 gels and from 2.36 to 2.84 for the 8:1 ratio. The addition of 5% polyethylene glycol-400 increases the pH from 4.52 to 4.92 for 1:1 gels and from 2.54 to 3.41 for the 8:1 ratio. A modification of the composition of the tested powders containing 5% polyethylene glycol-400 increased the range of the dynamic viscosity of formulations suitably from 78 to 520 mPa.s for 1:1 gels and from 39 to 423 mPa.s for the 8:1 ratio. Measurements performed in a biopharmaceutical model revealed that the gels obtained from powders containing lactic acid complexed with chitosan are able to move from 25 to 28 cm.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 95-101
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pharmaceutical assessment of thermosensitive hydrophilic gels with polyvinyl pyrrolidone k-30 containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035317.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
1
2- propylene glycol
glycerol
lactic acid complexed with chitosan
polyvinyl pyrrolidone K-30
thermosensitive polymer - poloxamer 407
vaginal infections
Opis:
Gels containing lactic acid complexed with chitosan at a stoichiometric ration 1:1 and 2:1 and 5-25% content of polyoxyethylene glycol 200 are able to move from 25 to 30 cm. Measurements performed in a biopharmaceutical model revealed that the addition of 20% poloxamer 407 to gels containing lactic acid complexed with chitosan in a stoichiometric ration 1:1 decreases their movability from 20 to 25 cm and at 2:1 ratio, from 22 to 28 cm. Higher concentrations of the poloxamer 407: 23 and 25% result in the movability of 20 to 24 cm. The addition of 5% PVP K-30 besides 1,2-propylene glycol increases the movability gels containing lactic acid complexed with chitosan in a stoichiometric ration 1:1 from 24 cm to 28 cm and at 2:1 ratio from 26 cm to 30 cm. Higher concentrations of the poloxamer 407: 23 and 25% result in the movability of 24 to 27 cm
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 123-131
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of a polyvinyl alcohol and selected auxiliary substances on the properties of thermosensitive hydrophilic gels containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035323.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
1
2- propylene glycol
glycerol
lactic acid complexed with chitosan
polyvinyl alcohol
thermosensitive polymer - poloxamer 407
vaginal infections
Opis:
Gels containing lactic acid complexed with chitosan at a stechiometric ratio 1:1 and 2:1 and 5-25% content of PEG-200 reveal pH from 3.42 to 4.95. The addition of 20 – 25% poloxamer 407 increases the pH from 4.55 to 5.30 for 1:1 gels and from 4.00 to 4.85 for 2:1 gels. The addition of 0.5% polyvinyl alcohol decreases the pH of the investigated gels from 4.00 to 4.55 for 1:1 gels and from 3.85 to 4.40 for 2:1 gels. The addition of poloxamer 407 at concentrations of 20 to 25% increases the dynamic viscosity from 506.14 to 641.20 for 1:1 and from 540.35 to 692.55 for 2:1 ratios. The addition of 0.5% polyvinyl alcohol increases the dynamic viscosity from 590.20 to 720.63 for 1:1 and from 560.90 to 698.82 for 2:1 ratios. The addition of polyvinyl alcohol and auxiliary substances reduces the pH and maintains high adhesion.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 107-114
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
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