Abiotic Transformation of Unsaturated Lipids and Hydrocarbons in Senescent Phytoplanktonic Cells

Author(s):  
Jean-François Rontani
2020 ◽  
Author(s):  
Guifang Feng ◽  
Yanhong Hao ◽  
Liang Wu ◽  
Suming Chen

The photocycloaddition of olefins with carbonyls is of fundamental interest and practical importance in C=C bond location in unsaturated lipids. However, the traditional UV light activated [2+2] photocycloaddition reaction suffers side reactions and potential health damage. Here, we reported the first example of visible-light activated [2+2] photocycloaddition of anthraquinone with unsaturated lipids. This reaction showed great capability for locating the C=C bonds in various kinds of monounsaturated and polyunsaturated lipids by combining with tandem mass spectrometry (MS), such as fatty acids, phospholipids and glycerides. Based on this developed reaction, a workflow with liquid chromatography tandem MS method was developed for the global identification of unsaturated lipids in human serum, and 86 of monounsaturated and complicated polyunsaturated lipids were identified with definitive positions of C=C bonds. This approach provides new insights both on the photocycloaddition reactions and the structural lipidomics.


Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 940
Author(s):  
Michael G. Kontominas ◽  
Anastasia V. Badeka ◽  
Ioanna S. Kosma ◽  
Cosmas I. Nathanailides

Seafood products are highly perishable, owing to their high water activity, close to neutral pH, and high content of unsaturated lipids and non-protein nitrogenous compounds. Thus, such products require immediate processing and/or packaging to retain their safety and quality. At the same time, consumers prefer fresh, minimally processed seafood products that maintain their initial quality properties. The present article aims to review the literature over the past decade on: (i) innovative, individual packaging technologies applied to extend the shelf life of fish and fishery products, (ii) the most common combinations of the above technologies applied as multiple hurdles to maximize the shelf life of seafood products, and (iii) the respective food packaging legislation. Packaging technologies covered include: Modified atmosphere packaging; vacuum packaging; vacuum skin packaging; active food packaging, including oxygen scavengers; carbon dioxide emitters; moisture regulators; antioxidant and antimicrobial packaging; intelligent packaging, including freshness indicators; time–temperature indicators and leakage indicators; retort pouch processing and edible films; coatings/biodegradable packaging, used individually or in combination for maximum preservation potential.


Author(s):  
Patricio Ruiz ◽  
Camila Fernández ◽  
Elena Ifandi ◽  
Pierre Eloy ◽  
Isaac Meza-Trujillo ◽  
...  

Langmuir ◽  
2021 ◽  
Vol 37 (8) ◽  
pp. 2586-2595
Author(s):  
Nicolas Anton ◽  
Philippe Pierrat ◽  
Germain A. Brou ◽  
Gildas K. Gbassi ◽  
Ziad Omran ◽  
...  

RSC Advances ◽  
2014 ◽  
Vol 4 (28) ◽  
pp. 14335-14347 ◽  
Author(s):  
Raina Thakur ◽  
Anupam Das ◽  
Anjan Chakraborty

The interaction of human serum albumin (HSA) with liposomes made of saturated and unsaturated phosphocholines has been studied using circular dichroism (CD), steady state and time resolved fluorescence spectroscopic techniques.


1989 ◽  
Vol 10 (1) ◽  
pp. 39-41 ◽  
Author(s):  
Margareta Törnqvist ◽  
B. Gustafsson ◽  
A. Kautiainen ◽  
M. Harms-Ringdahl ◽  
F. Granath ◽  
...  

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