Correlating solvation with conformational pathways of proteins in alcohol-water mixtures: A THz spectroscopic insight

2021 ◽  
Author(s):  
Partha Pyne ◽  
Debasish Das Mahanta ◽  
Himanshu Gohil ◽  
S. S. Prabhu ◽  
Rajib K Mitra
Keyword(s):  
Active Participant ◽  
Alcohol Water ◽  
Biophysical Process

Water being an active participant in most of the biophysical process, it is important to trace how protein solvation changes as its conformations evolves in presence of solutes or co-solvents....

Revising Plants, man and life: Edgar Anderson reshapes a classic book

2003 ◽  
Vol 30 (1) ◽  
pp. 85-96 ◽  
Author(s):  
Kim Kleinman
Keyword(s):  
Twentieth Century ◽  
Evolutionary Theory ◽  
Evolutionary Synthesis ◽  
Ernst Mayr ◽  
Active Participant ◽  
Evolutionary Mechanism ◽  
Popular Work ◽  
Scientific Attention ◽  
Key Events ◽  
Jesup Lectures

On at least four occasions, Edgar Anderson (1897–1969) began revising his book Plants, man and life (1952). Given both its place in Anderson's career and his place in the development of evolutionary theory in the mid-twentieth century, the emendations are noteworthy. Though a popular work, Plants, man and life served as the distillation of Anderson's ideas on hybridization as an evolutionary mechanism, the need for more scientific attention on domesticated and semi-domesticated plants, and the opportunities such plants provided for the study of evolution. Anderson was an active participant in several key events in what historians have come to call the Evolutionary Synthesis. For example, he and Ernst Mayr shared the 1941 Jesup Lectures on “Systematics and the origin of species”. Anderson's proposed revisions to his book reflect both an attempt to soften certain acerbic comments as well as an attempt to recast the book as a whole.

Determination of δ-hexadecansultone in sodium α-olefinesulphonates and liquid detergents using gas chromatography-mass spectrometry (GC/MS)

2019 ◽  
Vol 85 (7) ◽  
pp. 16-21
Author(s):  
Liliya R. Mubarakova ◽  
German K. Budnikov
Keyword(s):  
Multicomponent Mixture ◽  
Operating Mode ◽  
Complete Separation ◽  
Gas Chromatography Mass Spectrometry ◽  
Liquid Detergent ◽  
Cyclic Esters ◽  
Alcohol Water ◽  
Household Chemicals ◽  
Hydrolysis Of

Sultones are cyclic esters of hydroxysulfonic acids, which are formed in the process of sulfonation of α-olefins with sulfur trioxide gas. More stable sultones may be present in the final product — an anionic surfactant — sodium α-olefin sulfonate (AOC-Na). AOC-Na is widely used in the production of household chemicals and cosmetic products, including liquid dishwashing detergents. Sultones are strong skin sensitizers, their level in AOC-Na should be strictly controlled and not exceed 5 ppm. Operational and strict control of the sultone content upon AOC-Na production allows timely adjustment at the stage of hydrolysis, which leads to a more complete disclosure of the sultone cycle with the formation of the corresponding olefin sulfonates and hydroxyalkanesulfonates. We propose a method for determining δ-hexadecansultone in liquid dishwashing detergents and sodium α-olefinsulfonates obtained on the basis of α-olefins of C14 – C16 fractions using GC/MS, which provides shortening of sample preparation and keeps the sensitivity with a detection limit of 0.02 mg/kg. The effect of various weakly polar and non-polar organic solvents used for Sultone extraction from AOC-Na and liquid detergent on liquid extraction based on the dispersion of the extractant in an alcohol/water phase is studied. When selecting the solvent we have shown that the use of diethyl ether provided the best extraction of the analyte. Determination of the analyte extraction recovery was performed using the reaction of hydrolysis of the extracted mixture. We specified the operating mode of the device which provided complete separation of the components of the analyzed compounds including the samples of liquid detergent for dishes being a multicomponent mixture of complex composition.

Savoldo’s Magdalene: “True Reformations Are Internal”

2019 ◽  
Author(s):  
Michael Calder
Keyword(s):  
Reform Movement ◽  
Actual Process ◽  
Active Participant ◽  
The Subject ◽  
Narrative Function

The subject of Giovanni Girolamo Savoldo’s series of Magdalene paintings has long been a matter of debate. Looking at the series in the context of the reform movement in Venice in the 1520s and 1530s, when Christ’s resurrection could be viewed metaphorically, this article aims to demonstrate that Savoldo adopts a number of motifs to convey the idea of a renewing of life, which identify “Mary” as the mother. The case made here is that Savoldo’s paintings move beyond representation to the actual process of transformation, with an experiential function where the beholder was an active participant and narrative function was subordinated.

Effect of surfactant on drying and rheology of poly (vinyl alcohol) – water coatings

2021 ◽  
pp. 1-13
Author(s):  
Raj Kumar Arya ◽  
D. Giribabu ◽  
Jyoti Sharma ◽  
Manju Rawat ◽  
Avinash Chandra ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Alcohol Water
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