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Wyszukujesz frazę "lactic acid complexed with chitosan" wg kryterium: Temat


Tytuł:
Selected pharmaceutical properties of thermosensitive hydrophilic gels with hydroxypropylmethylcellulose containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035213.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
1
2- propylene glycol
glycerol
hydroxypropylmethylcellulose
lactic acid complexed with chitosan
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. The addition of 4% hydroxypropylmethylcellulose besides glycerol increases the movability gels containing lactic acid complexed with chitosan in a stoichiometric ration 1:1 from 25 cm to 28 cm and at 2:1 ratio from 27 cm to 30 cm. Higher concentrations of the poloxamer 407: 23 and 25% result in the movability of 24 to 29 cm The addition of 5-25% glycerol decreases the pH of investigated gels from 3.95 to 4.45 (1:1) and from 3.63 to 4.30 (2:1). The addition of 5-25% 1,2-propylene glycol decreases the pH of investigated gels from 4.00 to 4.46 (1:1) and from 3.70 to 4.33 (2:1). The use of hydroxypropylmethylcellulose allowed to obtain physiological range. The addition of hydroxypropylmethylcellulose reduces the pH and maintains high adhesion.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 131-138
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of a dextrane and hydrophilizing substances on the properties of thermosensitive hydrophilic gels containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035215.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
1
2- propylene glycol
dextrane
glycerol
lactic acid complexed with chitosan
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 1.0% dextrane decreases the pH of investigated gels from 4.40 to 4.90 (1:1) and from 4.00 to 4.48 (2:1). 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 1.0% dextrane increases the dynamic viscosity from 665.23 to 750.28 for 1:1 and from 645.50 to 740.16 for 2:1 ratios. The addition of dextrane and glycerol or 1,2-propylene glycol reduces the pH and maintains high adhesion. The use of dextrane and hydrophilizing substances allowed to obtain physiological range pH.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 115-122
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of a hydrophilising substance on the viscosity of gynaecological gels containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035410.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs.
calcium alginate
hydrophilic gels
lactic acid complexed with chitosan
thermosensitive polymerpoloxamer 407
vaginal infections
Opis:
Thus ensuring a continuous action of a drug also during daily activity time of a patient is a vital question in gynaecological treatment. The main problem in applied therapies is to maintain the continuity of treatment during 24 hours. The addition of 5-25% glycerol or 1,2-propylene glycol decreases the pH of investigated gels with calcium alginate to 4.20 to 4.88 (1:1) and 3.69 to 4.19 (2:1); 4.29 to 4.88 (1:1) and 3.62 to 4.40 (2:1). The addition of 5-25% glycerol or 1,2-propylene glycol increases the dynamic viscosity gels with calcium alginate from 595.14 to 820.25 for 1:1 and 640.15 to 769.12 for 2:1; 585.40 to 815.56 for 1:1 and 648.52 to 780.10 for 2:1 ratios. Rheological investigations revealed an increase in the dynamic viscosity of preparations containing poloxamer 407 with the addition of calcium alginate and glycerol or 1,2-propylene glycol in comparison to the reference gels.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2012, 17; 125-132
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of a polyvinyl alcohol and dextrane on the properties of thermosensitive hydrophilic gels containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035421.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs.
dextrane
lactic acid complexed with chitosan
polyvinyl alcohol
thermosensitive polymer - poloxamer 407
vaginal infections
Opis:
Gels containing lactic acid complexed with chitosan at a stoichiometric ratio 1:1 and 2:1 and 5 - 25% content of polyoxyethylene glycol 200 reveal pH from 2.5 to 4.6. The addition of 20 – 25% poloxamer 407 increases the pH to 4.55 to 5.30 for 1:1 gels and 4.00 to 4.85 for 2:1 gels. The addition of 0.5% polyvinyl alcohol decreases the pH of the investigated gels to 4.00 to 4.55 for 1:1 gels and 3.85 to 4.40 for 2:1 gels. The addition of 1.0% dextrane decreases the pH of investigated gels to 4.40 to 4.90 (1:1) and 4.00 to 4.48 (2:1). Rheological investigations revealed an increase in the dynamic viscosity of preparations containing poloxamer 407 with the addition of polyvinyl alcohol or dextrane in comparison to the reference gels. 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; 2011, 16; 99-104
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of a hydrophilizing substance on the properties of thermosensitive hydrophilic gels containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035479.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
anti-inflammatory drugs.
hydrophilic gels
lactic acid complexed with chitosan
pectin
thermosensitive polymer-poloxamer 407
vaginal infections
Opis:
Commonly applied drug forms tend to leave the vagina when the patient assumes an upright position. Permanent contact of the drug form with the vaginal mucosa during daily activities of the patient is an indispensable condition for 24-hour therapy. This condition may be fulfilled by drug forms with high ability to adhere to vaginal mucosa. The investigations demonstrated that the thermosensitive polymer - poloxamer 407 increases significantly the adhesive properties of hydrophilic gels, but at the same time it increases their pH. The use of pectin resulted in a decrease of the pH. The addition of glycerol or 1,2-propylene glycol caused further decrease of the pH. Rheological investigations demonstrated positive pharmaceutical properties of the investigated preparations. The obtained parameters gels should provide positive application effects. The investigations revealed 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; 2011, 16; 105-110
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:
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
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:
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:
Influence of poloxamer 407 on the properties gynecological powders containing lactic acid complexed with chitosan
Autorzy:
Małolepsza-Jarmołowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034722.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:
Thermosensitive hydrophilic powders passing in gels containing lactic acid complexed with chitosan at a stoichiometric ratio 1:1 and 8:1 reveal pH ranged from 4.00 to 4.91 and 2.56 to 3.42. Rheological studies demonstrated that the investigated thermosensitive gels obtained from powders have the dynamic viscosity in the ranged from 269 mPa*s to 579 mPa*s for the 1:1 stoichiometric ratio and in the range from 220 mPa*s to 530 mPa*s for 8:1 ratio. As a result of the research preparations with different pH values including the physiological range were obtained. The thermosensitive gels obtained from the thermosensitive powders were characterized by the specific dynamic viscosity. The results 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; 2016, 21; 154-159
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł

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