scholarly journals Synthesis, Characterization, and Drug Release Study of Modified Chitosan

2020 ◽  
Vol 10 (03) ◽  
pp. 360-365
Author(s):  
Farah. Kh. H. Al-Juboory ◽  
Ali Azeez Mahmood ◽  
Hala. M. G. Al-Zahawi
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Schiff Base ◽  
Differential Thermal Analysis ◽  
Drug Release ◽  
Uv Spectroscopy ◽  
Drug Loading ◽  
Modified Chitosan ◽  
Release Study ◽  
Thermal Stability Of

This research included loading of drugs (ibuprofen, ketoprofen, and fenoprofen) on a chitosan polymer to produce drug-loading polymer by entering the chitosan in a Schiff base reaction to protect -NH2 group, the reacting of the product with drug chloride. The prepared compounds were identified spectroscopically, by using infrared spectroscopy, 1H-NMR, and 13C-NMR. The thermal stability of chitosan was measured by using differential scanning calorimeter (DSC) and Differential thermal analysis (DTA). The drug release of ibuprofen, ketoprofen, and fenoprofen from chitosan in hypothetical stomach fluid was studied. The drug concentration that was released in stomach fluid several times was determined by measuring the absorbance in ultraviolet (UV) spectroscopy.

Study of thermal stability of n-type skutterudites Sr0.07Ba0.07Yb0.07Co4Sb12 by differential thermal analysis and Knudsen effusion method

Calphad ◽  
2021 ◽  
Vol 73 ◽  
pp. 102258
Author(s):  
František Zelenka ◽  
Jakub Strádal ◽  
Pavel Brož ◽  
Jan Vřešťál ◽  
Jiří Buršík ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Knudsen Effusion ◽  
Knudsen Effusion Method ◽  
Effusion Method ◽  
Thermal Stability Of

scholarly journals Thermal stability and thermal decomposition of sucralose

2018 ◽  
Vol 39 (4) ◽  
pp. 21
Author(s):  
Gilbert Bannach ◽  
Rafael R. Almeida ◽  
Luis G. Lacerda ◽  
Egon Schnitzler ◽  
Massao Ionashiro
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Thermal Decomposition ◽  
Differential Thermal Analysis ◽  
Infrared Spectroscopy ◽  
Scanning Calorimetry ◽  
Thermoanalytical Techniques ◽  
Thermal Stability Of

Several papers have been described on the thermal stability of the sweetener, C12H19Cl3O8 (Sucralose). Nevertheless no study using thermoanalytical techniques was found in the literature. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC) and infrared spectroscopy, have been used to study the thermal stability and thermal decomposition of sweetener.

Functional Modification of Xylan-Rich Hemicelluloses in Ionic Liquid

2011 ◽  
Vol 391-392 ◽  
pp. 950-954 ◽  
Author(s):  
Xin Wen Peng ◽  
Jun Li Ren ◽  
Lin Xin Zhong ◽  
Yan Bo Huang ◽  
Run Cang Sun
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Ionic Liquid ◽  
Differential Thermal Analysis ◽  
Nmr Spectroscopy ◽  
Thermal Behavior ◽  
Succinic Anhydride ◽  
Different Temperatures ◽  
Thermal Stability Of ◽  
C Nmr

Xylan-rich Hemicelluloses (XH) isolated from wheat straw were converted to functional biopolymers by modification using succinic anhydride (SA) as reactant without catalyst in 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) ionic liquid. The reaction was performed under various conditions such as different temperatures, different times, and the different amounts of SA, and the effect of reaction factors on the degree substitution (DS) of products were discussed. The product had the maximum DS of 1.80. The structure of modified hemicellulosic derivatives (MD) was actually confirmed by13C NMR spectroscopy. The thermal behavior of MD was monitored by means of thermogravimetry (TG) and differential thermal analysis (DTA), and the thermal stability of MD was lower than XH.

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