scholarly journals Physical characterization of fatty acid supplements with varying enrichments of palmitic and stearic acid by differential scanning calorimetry

2020 ◽  
Vol 103 (10) ◽  
pp. 8967-8975
Author(s):  
Richard P. Shepardson ◽  
Ekaterina A. Bazilevskaya ◽  
Kevin J. Harvatine
Keyword(s):  
Differential Scanning Calorimetry ◽  
Fatty Acid ◽  
Stearic Acid ◽  
Physical Characterization ◽  
Scanning Calorimetry

scholarly journals Preparation and characterization of aluminum stearate

2003 ◽  
pp. 55-60 ◽  
Author(s):  
Eva Loncar ◽  
Gizela Lomic ◽  
Radomir Malbasa ◽  
Ljiljana Kolarov
Keyword(s):  
Differential Scanning Calorimetry ◽  
Stearic Acid ◽  
Sodium Hydroxide ◽  
The Other ◽  
Commercial Product ◽  
Precipitation Method ◽  
Scanning Calorimetry ◽  
Dominant Form

Preparation of aluminum stearate by the precipitation method was examined under various conditions of stearic acid saponification with sodium hydroxide. It was proved that the most favorable ratio of acid/alkali was 1:1.5 and that the obtained soap was very similar to the commercial product. Endothermic effects determined by differential scanning calorimetry and also the other parameters showed that the soaps consisted mono-, di-, tristearates and non-reacted substances, where distearate was the dominant form.

scholarly journals Characterization of Thermal Behaviour and Fatty Acid Profile of Coconut Based Chocolate Novelties

2020 ◽  
Author(s):  
V. Divya ◽  
D. Baskaran
Keyword(s):  
Differential Scanning Calorimetry ◽  
Fatty Acid ◽  
Cocoa Butter ◽  
Fatty Acid Profile ◽  
Coconut Oil ◽  
Coconut Milk ◽  
Consumer Acceptance ◽  
Scanning Calorimetry ◽  
Coconut Cream

A study was carried out to produce chocolates from coconut variants viz, coconut oil, coconut cream and coconut milk as a substitute for cocoa butter. The chocolate prepared with 40% cocoa butter was taken as control. Cocoa butter substituted at the levels of 10%, 20% and 30 % by coconut oil, coconut cream and coconut milk respectively were optimized based on the consumer acceptance. The fatty acid profile of the developed chocolate novelties were analysed using GC-MS and the lauric acid content was elevated to 1.92 %, 1.04 % and 1.17% in coconut oil, coconut cream and coconut milk chocolates respectively from 0.02 % in control. The thermal behavior of the developed chocolate novelties were analyzed by using Differential Scanning Calorimetry which exhibited harmonious distinct endothermic transitions between 28oC and 53oC. The developed chocolate novelties exhibited stable melting ranges in comparison with control.

Gelatin and Glycerine-Based Bioadhesive Vaginal Hydrogel

2020 ◽  
Vol 17 (4) ◽  
pp. 303-311
Author(s):  
Roberta Cassano ◽  
Federica Curcio ◽  
Delia Mandracchia ◽  
Adriana Trapani ◽  
Sonia Trombino
Keyword(s):  
Differential Scanning Calorimetry ◽  
Inflammatory Process ◽  
Vaginal Mucosa ◽  
Vaginal Infection ◽  
Scanning Calorimetry ◽  
Time Intervals ◽  
Site Specific ◽  
Release Studies ◽  
Hiv Seropositive

Aim: The work’s aim was the preparation and characterization of a hydrogel based on gelatin and glycerine, useful for site-specific release of benzydamine, an anti-inflammatory drug, able to attenuate the inflammatory process typical of the vaginal infection. Objective: The obtained hydrogel has been characterized by Electronic Scanning Microscopy (SEM) and Differential Scanning Calorimetry (DSC). In addition, due to the precursor properties, the hydrogel exhibits a relevant mucoadhesive activity. Methods: The swelling degree was evaluated at two different pHs and at defined time intervals. In particular, phosphate buffers were used at pH 6.6, in order to mimic the typical conditions of infectious diseases at the vaginal level, particularly for HIV-seropositive pregnant women, and pH 4.6, to simulate the physiological environment. Results: The obtained results revealed that the hydrogel swells up well at both pHs. Conclusion: Release studies conducted at both pathological and physiological pHs have shown that benzydamine is released at the level of the vaginal mucosa in a slow and gradual manner. These data support the hypothesis of the hydrogel use for the site-specific release of benzydamine in the vaginal mucosa.

scholarly journals Identification of LDPE Grades Focusing on Specific CH2 Raman Vibration Modes

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Richard Jumeau ◽  
Patrice Bourson ◽  
Michel Ferriol ◽  
François Lahure ◽  
Marc Ponçot ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Raman Spectroscopy ◽  
Vibrational Spectroscopy ◽  
Phenomenological Model ◽  
Low Density ◽  
Vibration Modes ◽  
Scanning Calorimetry ◽  
Lamella Thickness ◽  
Poly Ethylene

The possibilities of applications of vibrational spectroscopy techniques (Raman spectroscopy) in the analysis and characterization of polymers are more and more used and accurate. In this paper, our purpose is to characterize Low Density Poly(Ethylene) (LDPE) grades by Raman spectroscopy and in particular with CH2 Raman vibration modes. With temperature measurements, we determine different amorphous and crystalline Raman assignments. From these results and on the basis of the evolution of CH2 bending Raman vibration modes, we develop a phenomenological model in correlation with Differential Scanning Calorimetry and in particular with crystalline lamella thickness determination.

scholarly journals STRUCTURAL AND MECHANICAL CHARACTERIZATION OF DEFORMED POLYMER USING CONFOCAL RAMAN MICROSCOPY AND DSC

2016 ◽  
Vol 3 ◽  
pp. 47-50
Author(s):  
Birgit Neitzel ◽  
Florian Aschermayer ◽  
Milan Kracalik ◽  
Sabine Hild
Keyword(s):  
Differential Scanning Calorimetry ◽  
Raman Spectroscopy ◽  
Mechanical Characterization ◽  
Polymer Chains ◽  
Polymer Materials ◽  
Confocal Raman Microscopy ◽  
Micro Structure ◽  
Scanning Calorimetry ◽  
Confocal Raman

Polymers have various interesting properties, which depend largely on their inner structure. One way to influence the macroscopic behaviour is the deformation of the polymer chains, which effects the change in microstructure. For analyzing the microstructure of non-deformed and deformed polymer materials, Raman spectroscopy as well as differential scanning calorimetry (DSC) were used. In the present study we compare the results for crystallinity measurements of deformed polymers using both methods in order to characterize the differences in micro-structure due to deformation. The study is ongoing, and we present the results of the first tests.

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