IV.—An X-ray Examination of Saturated Dicarboxylic Acids and Amides of the Fatty Acid Series

1929 ◽  
Vol 48 ◽  
pp. 20-27 ◽  
Author(s):  
Edward Henderson
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Malonic Acid ◽  
Dicarboxylic Acids ◽  
X Rays ◽  
X Ray ◽  
Fatty Acid Amides

SummarySeveral additional members of the series of normal saturated dicarboxylic acids have been investigated by X-rays, and the results are in agreement with the conclusions arrived at in an earlier paper. In the series of mono- and di-alkyl malonic acids, successive reflection planes are separated by the length of one molecule. The series of fatty acid amides closely resembles that of the fatty acids themselves. The cleavage planes are separated by the length of two molecules oriented in opposite directions.My thanks are due to Mr N. K. Adam for the specimens of mono- and dioctadecyl malonic acid, and to Sir James Walker for his advice and helpful criticism.

To the question of the treatment of surgical tbc

1926 ◽  
Vol 22 (5-6) ◽  
pp. 737
Author(s):  
I. Friedland
Keyword(s):  
Fatty Acids ◽  
Adrenal Gland ◽  
Fish Oil ◽  
Healthy Subject ◽  
Normal State ◽  
Adrenal Glands ◽  
X Rays ◽  
Subcutaneous Injections ◽  
X Ray

Arikhbaev (Vesti. Khir., 1926, book 17-18), having established the normal state of the lipolytic index in 30 people with various diseases and then proceeding to the determination of lipase in the blood of 9 various patients and 1 healthy subject exposed to irritating doses of X-ray rays on the adrenal gland, which caused its hyperfunction, finished his research by observing 5 patients with various forms of surgical tuberculosis, of whom three underwent simultaneous x-rays of the adrenal glands with subcutaneous injections of fish oil neutralized from fatty acids, one - only injections of neutralized fish oil and one - only an operational aid.

scholarly journals Probing conformational changes of human serum albumin due to unsaturated fatty acid binding by chemical cross-linking and mass spectrometry

2005 ◽  
Vol 387 (3) ◽  
pp. 695-702 ◽  
Author(s):  
Bill X. HUANG ◽  
Chhabil DASS ◽  
Hee-Yong KIM
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Fatty Acid ◽  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Conformational Changes ◽  
Cross Linking ◽  
X Ray ◽  
Chemical Cross Linking

Mass spectrometry with chemical cross-linking was used to probe the conformational changes of HSA (human serum albumin) in solution on interaction with monounsaturated OA (oleic acid) or polyunsaturated AA (arachidonic acid) or DHA (docosahexaenoic acid). Fatty acid-free or -bound HSA was modified with lysine-specific cross-linkers and digested with trypsin. Cross-linked peptides were analysed by nano-electrospray ionization MS to localize the sites of cross-linking. Our data indicated that a local conformational change involving movement of the side chains of Lys-402 of subdomain IIIA or Lys-541 of subdomain IIIB occurred upon binding of all three fatty acids. Our data also indicated that the side chains of Lys-205 (IIA) and Lys-466 (IIIA) moved closer towards each other upon binding AA or DHA, but not OA, suggesting that the conformations of HSA when bound to mono- and poly-unsaturated fatty acids are distinctively different. While these observations agreed with previous X-ray crystallographic studies, the distances between ε-amino groups of most cross-linked lysine pairs were shorter than the crystal structure predicted, possibly reflecting a discrepancy between the solution and crystal structures. This method can serve as a useful complement to X-ray crystallography, particularly in probing the structure of a protein in solution.

The hygroscopicity and reactivity of fatty acid atmospheric aerosol proxies are affected by nanostructure 

2021 ◽  
Author(s):  
Adam Milsom ◽  
Adam Squires ◽  
Nicholas Terrill ◽  
Andrew Ward ◽  
Christian Pfrang
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Atmospheric Aerosol ◽  
Structural Changes ◽  
Chemical Reactivity ◽  
Structural Parameters ◽  
Raman Microscopy ◽  
X Ray ◽  
Molecular Arrangement ◽  
Surfactant Material

<p>Atmospheric aerosol hygroscopicity and reactivity play a significant role in determining aerosol fate, and are affected by composition and other physical properties. Organic aerosol emissions contain fatty acids, along with sugars such as fructose. As surfactants, fatty acids organise into a range of nanostructures (3-D molecular arrangements), dependent on water content and mixture composition. In this study, we were able to demonstrate (and quantify) that the chemical reactivity of this proxy is dependent on its 3-D molecular arrangement. Furthermore, we have determined the effect of each observed nanostructure on hygroscopicity by measuring the swelling of these nanostructures as a function of relative humidity. We did this by coating capillaries with a fatty acid/sugar as a mixture for an urban aerosol, and following structural changes with simultaneous Small-Angle X-ray Scattering (SAXS) and Raman microscopy, at a synchrotron X-ray source. SAXS measured the nano-structural parameters required to follow both the reaction kinetics (ozonolysis) and hygroscopic swelling of each nanostructure. Raman microscopy provided complementary kinetic information and supported these findings. We found that the molecular arrangement of surfactant material has an impact on both the chemical kinetics and hygroscopicity. This has implications for the persistence of particulate matter in the urban environment and surfactant material in the atmosphere.</p>

Identification of Fatty Acids and Fatty Acid Amides in Human Meibomian Gland Secretions

2007 ◽  
Vol 48 (1) ◽  
pp. 34 ◽  
Author(s):  
Kelly K. Nichols ◽  
Bryan M. Ham ◽  
Jason J. Nichols ◽  
Corrie Ziegler ◽  
Kari B. Green-Church
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Meibomian Gland ◽  
Fatty Acid Amides

Transesterification of Kapok Seed Oil (Ceiba pentandra) Using Heterogeneous Catalyst Bimetallic Oxide of Zinc and Copper Supported by γ-Alumina

2020 ◽  
Vol 988 ◽  
pp. 87-94
Author(s):  
Nyoman Puspa Asri ◽  
W.D. Prasetiyo ◽  
A. Kafidhu ◽  
A. Atiqoh ◽  
E.A. Puspitasari ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Zinc Oxide ◽  
Fatty Acid ◽  
Seed Oil ◽  
Acid Methyl Ester ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ceiba Pentandra ◽  
Activity Test ◽  
Acid Methyl

Biodiesel was produced from Kapok seed (Ceiba pentandra) oil (KSO) using heterogeneous bimetallic oxide of copper and zinc supported by γ-alumina. The Alumina-supported copper oxide-zinc oxide (CuO-ZnO γ /- Al2O3) further notated by ACZ was synthesized using precipitation, impregnation and gel methods. It also was characterized using the X-ray diffraction (X-RD), and Brunauwer-Emmett Teller (BET) methods. Before being transesterified, KSO was subjected to pretreatment with the aim of minimizing gum and other impurities and reducing the concentration of free fatty acids. The activity test of ACZ catalyst was done by introducing it through the transesterification process of KSO with methanol. The transesterification process was carried out in a laboratory scale three neck flask. The effect of calcinating temperature (°C), and calcinating time of catalyst (h) on the yield of fatty acid methyl ester (FAME) were studied, respectively. The results revealed that the kapok seed oil was worthy and potentially to transesterified into biodiesel using ACZ catalyst with highest FAME yield of 46.67%.

The effect of pH on the toxicity of fatty acids and fatty acid amides to rainbow trout gill cells

2014 ◽  
Vol 146 ◽  
pp. 1-11 ◽  
Author(s):  
Matthew J. Bertin ◽  
Delia C. Voronca ◽  
Robert W. Chapman ◽  
Peter D.R. Moeller
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Rainbow Trout ◽  
Effect Of Ph ◽  
Fatty Acid Amides ◽  
Gill Cells ◽  
Trout Gill
Sign in / Sign up

Export Citation Format

Share Document