Preparation and properties of triethyl citrate plasticized chitosan‐based membranes for efficient release of curcumin

2021 ◽  
pp. 51908
Author(s):  
Li Huo ◽  
Yuru Wei ◽  
Haixia Zhang ◽  
Ying Wang ◽  
Bo Deng ◽  
...  
Keyword(s):  



2018 ◽  
Vol 31 (4) ◽  
pp. e12599 ◽  
Author(s):  
N. Skroza ◽  
A. Mambrin ◽  
E. Tolino ◽  
A. Marchesiello ◽  
I. Proietti ◽  
...  


1967 ◽  
Author(s):  
NAVAL WEAPONS CENTER CHINA LAKE CA
Keyword(s):  


2019 ◽  
pp. 089270571986827 ◽  
Author(s):  
Mehrnoush Monshizadeh ◽  
Sajad Seifi ◽  
Iman Hejazi ◽  
Javad Seyfi ◽  
Hossein Ali Khonakdar

Synergistic effects of organo-modified Mg-Al layered double hydroxide (LDH) and triethyl citrate (TEC) on the properties of poly(lactic acid) (PLA) were demonstrated. PLA/LDH nanocomposites in the absence and presence of TEC were fabricated via solution casting technique. Morphological analysis revealed that as the LDH concentration increases, the number of aggregations is also increased; however, introduction of TEC considerably enhanced the dispersion quality of LDHs. Differential scanning calorimetry results showed that the addition of LDH and TEC had no significant influence on the crystallinity of nanocomposites obtained from solution casting. In contrast, once the samples were cooled from melt, the concurrent use of LDH and TEC led to a dramatic enhancement in the crystallinity of PLA ( X c = 55.5%). Moreover, the LDH nanoparticles counterbalanced the adverse effects of plasticization by TEC leading to enhanced toughness of the final nanocomposites. LDH had also a positive influence on thermal stability of PLA, indicating the heat-insulating role of LDH particles. In conclusion, the concurrent use of LDH and TEC could extend the applicability of PLA especially in food packaging applications.





2020 ◽  
pp. tobaccocontrol-2019-055500 ◽  
Author(s):  
Hanno C Erythropel ◽  
Paul T Anastas ◽  
Suchitra Krishnan-Sarin ◽  
Stephanie S O'Malley ◽  
Sven Eric Jordt ◽  
...  

Background‘Juul’ is the dominant US e-cigarette brand and was recently introduced to Canada, UK, France, Germany and Italy, with several flavours available across countries. US/Canadian products are sold with 5%, 3% and 1.5% (Canada only) nicotine content, whereas European Union (EU) regulation limits nicotine content to 1.7%. The differential nicotine content raises the question if flavour profiles and Juul device power output differ between countries.Methods‘Mint’, ‘Vanilla’ and ‘Mango’ e-liquids from all six countries were purchased in 2019 and analysed by GC/MS for their principal flavourant and nicotine content. In addition, device power specifications were compared for devices purchased from the respective countries.ResultsCompositions of Juul e-liquids from the USA and Canada were identical and differed from the EU-marketed liquids, in which principal flavourant concentrations were significantly lower. EU Juul ‘Mint’ e-liquids contained a synthetic coolant, N-ethyl-p-menthane-3-carboxamide (WS-3), absent in US/Canadian products. US/Canadian ‘Mango’ e-liquid contained triethyl-citrate, an emulsifier. Nicotine contents matched label information, and devices had identical power specifications.ConclusionsTested US/Canadian Juul e-liquids contained higher flavour concentrations than EU products, likely reflecting adaptation to user preferences. In EU, ‘Mint’ e-liquid, menthol is partially substituted with the synthetic coolant WS-3 that elicits a cooling effect like menthol but lacks its distinct ‘minty’ odour. The inhalational safety of WS-3 is unknown. The use of an emulsifier in US/Canadian ‘Mango’ Juul e-liquid may be necessary to keep the product homogeneous. Similar power specifications of devices between countries suggest that nicotine aerosol delivery is likely proportional to the e-liquid nicotine content.



1973 ◽  
Vol 77 (12) ◽  
pp. 1552-1557 ◽  
Author(s):  
F. A. Kundell ◽  
D. J. Robinson ◽  
W. J. Svirbely


2002 ◽  
Vol 241 (2) ◽  
pp. 301-310 ◽  
Author(s):  
Yucun Zhu ◽  
Navnit H Shah ◽  
A.Waseem Malick ◽  
Martin H Infeld ◽  
James W McGinity


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