Characterization of the interaction between gelatin and a spread monolayer of octadecanoic acid

1985 ◽  
Vol 263 (9) ◽  
pp. 778-781 ◽  
Author(s):  
R. W�stneck ◽  
L. Zastrow
Keyword(s):  
Octadecanoic Acid ◽  
Spread Monolayer

Characterization of the interaction between gelatin and a spread monolayer of octadecanoic acid

1985 ◽  
Vol 263 (9) ◽  
pp. 749-755 ◽  
Author(s):  
L. Zastrow ◽  
R. W�stneck ◽  
G. Kretzschmar
Keyword(s):  
Octadecanoic Acid ◽  
Spread Monolayer

CHARACTERIZATION OF FIXED OIL FROM SEEDS OF MOMORDICA TUBEROSA (ROXB) COGN. (CUCURBITACEAE) FRUITS BY GC-MS

INDIAN DRUGS ◽  
2012 ◽  
Vol 49 (04) ◽  
pp. 39-42
Author(s):  
M. S Kale ◽  
◽  
K. S. Laddha
Keyword(s):  
Oleic Acid ◽  
Stearic Acid ◽  
Eleostearic Acid ◽  
Octadecenoic Acid ◽  
Acid Value ◽  
Octadecatrienoic Acid ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Saponification Value

Fixed oil obtained from the seeds of Momordica tuberosa (Roxb) Cogn. fruits (family: Cucurbitaceae) was analyzed using GC-MS. Five compounds, namely palmitic acid (hexadecanoic acid), oleic acid (9-octadecenoic acid), stearic acid (octadecanoic acid), ?-eleostearic acid (9, 11, 13-octadecatrienoic acid) and gama-linolenic acid (6, 9, 12-octadecatrienoic acid) were found to be major compounds in fixed oil obtained from the seeds of M. tuberosa fruits. Physical constants saponification value, unsaponifiable matter and acid value were found to be 182.4, 1.56% w/w and 11.44 respectively.

scholarly journals Exploring the Characterization of biodegradable plastic “polyhyroxybutrate” (PHB) from Bacillus siamensis PHB 01 (MW440618) isolated from termite mound soil of Western Ghats of Coimbatore, Tamil Nadu.

2022 ◽  
Author(s):  
Subasri Mani ◽  
Gomathi Veu ◽  
Kavitha Mary Jackson
Keyword(s):  
Tamil Nadu ◽  
Ester Group ◽  
Brown Spot ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Termite Mound ◽  
Absorption Bands ◽  
Wave Numbers ◽  
Optimized Conditions

Abstract The present study was aimed to explore the characterization of polyhydroxy butrate extracted from the bacterial strain under optimized conditions for the production of bioplastic. Under optimized fermentation conditions, Polyhydroxy butrate (PHB) was extracted and subjected to examine their properties via Thin Layer Chromotogram (TLC), Gas Chromotogram- Mass Spectrometer (GC-MS), Fourier Transform Infrared spectrum (FTIR). The presence of a brown spot in the TLC plate indicates the presence of hydroxylgroup which is similar to the polymer group. GC-MS analysis of extracted PHB shows peaks at the retention time of 3.8, 11.6 which is corresponding to octadecanoic acid, hexadecanoic acid, butyl -2-ethylester confirms the presence of polymeric nature in the extracted PHB. The absorption bands of FTIR at 1719–1720 cm −1 indicate the presence of C=O group of PHB. The absorption peaks at wave numbers 500-1000 cm -1 , 1055 cm -1 and 1230 cm -1 denotes (OH) group, (C–O) stretch and (C=O) ester group. From these results, it was confirmed that the extracted PHB is having the potential to replace petroleum plastic.

Synthesis and Characterization of New Bolaform Surfactant from Palm Oil Derivative

2011 ◽  
Vol 364 ◽  
pp. 95-99 ◽  
Author(s):  
S.C. Goh ◽  
S.Y. Chin ◽  
L.M.S. Lee ◽  
Mohd Ambar Yarmo ◽  
N.I. Nik Yusof
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Thin Layer ◽  
Stationary Phase ◽  
Palm Oil ◽  
Atmospheric Pressure ◽  
Synthesis And Characterization ◽  
Octadecanoic Acid ◽  
Layer Chromatography

In this research, new chemistry is explored through a simple, efficient and cheap method to synthesize new surfactants from palm oil fatty acids. Oleic acid, which is one of the major fatty acids in palm oil, has been used as a starting material for the synthesis of surfactants. This study focuses on the synthesis and characterization of bolaform surfactants from oleic acid. For this purpose, two steps reaction will be carried out: Firstly, consisted of hydrobromination of oleic acid followed by reaction of 10-bromo-octadecanoic acid with ethane-1,2-dithiol and butane-1,2-dithiol. During the first stage of the reaction, hydrobromination of oleic acid was carried out by adding hydrobromic acid into the oleic acid. The reaction was carried out in benzene as solvent at 30°C and atmospheric pressure. This reaction gives 73% yield of 10-bromo-octadecanoic acid and it yield a black brownish liquid which have the m/z 363.2056 by ESI-MS(ToF) and –CH2-CHBr-CH2-shift (4.02 ppm) was well defined in1H-NMR. The separation of 10-bromo-octadecanoic acid was done through thin layer chromatography (TLC) with chloroform and methanol as the eluent and silica plate grade 60 F254as the stationary phase. The second stage of reaction was reacting the 10-bromo-octadecanoic acid with ethane-1,2-dithiol and butane-1,2-dithiol in THF as the solvent and 1,8-Diazabicyclo [5.4.0] undec-7-ene (DBU) as the catalyst respectively. These reactions were carried out at 30°C and atmospheric pressure. Product obtained was a two layers black brownish liquid with white colour precipitate gives m/z: 659.4813 for ethane-1,2-dithiol and m/z:686.5278 for butane-1,4-dithiol respectively using ESI-MS (ToF) mass spectroscopy. Separation was done on both bolaform surfactants through thin layer chromatography (TLC) with hexane and ethyl acetate as eluent and silica plate grade 60 F254as stationary phase, and finally followed by column chromatography. These two new surfactants will be tested for their physical-chemical properties as well as apply on nanomaterial stabilizer.

Characterization of Organic Acids with Different Atmospheric Particle Sizes

2012 ◽  
Vol 599 ◽  
pp. 14-22
Author(s):  
Xiang He ◽  
Feng Qian ◽  
Yao Li
Keyword(s):  
Fatty Acids ◽  
Human Activities ◽  
Dicarboxylic Acids ◽  
Photochemical Reactions ◽  
Particle Sizes ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Average Mass ◽  
Atmospheric Particle

Atmospheric particulate samples were collected during January, February, April and May 2012, separately. Twenty-one fatty acids and seven dicarboxylic acids were measured by GC-MS. The results show that average mass concentrations of fatty acids are 809.24ng/m³, 545.34ng/m³, 386.96ng/m³ and dicarboxylic acids are 215.14 ng/m³, 156.45 ng/m³, 111.43 ng/m³ in PM10, PM2.5, PM1, respectively. Fatty acids and dicarboxylic acids concentrate mainly in the PM1. C11-C24 of fatty acids exhibit a significant even carbon predominances, but dicarboxylic acids present no parity preponderance. In the fatty acids, the concentration of hexadecanoic acid is the highest with that of octadecanoic acid followed; Nonandioic acid is the highest in dicarboxylic acids. The results of source apportionments indicate that the fatty acids are mainly related with human activities. Coal burning for heating is the most important source in January and February, but its contribution decreases sharply in April and May for fatty acids; The main source of dicarboxylic acids is photochemical reactions.

Characterization of Oscillatoria F. Granulata Producing 2-methyl-isoborneol and Geosmin

1999 ◽  
Vol 40 (6) ◽  
pp. 245-250 ◽  
Author(s):  
Y. Tsuchiya ◽  
A. Matsumoto
Keyword(s):  
Gas Chromatography ◽  
Culture Medium ◽  
Atomic Emission ◽  
Gas Chromatography Mass Spectrometry ◽  
Octadecanoic Acid ◽  
Emission Detector ◽  
Odor Compounds ◽  
Musty Odor ◽  
Sulfur Containing

We characterized the cyanobacterium Oscillatoria f. granulata isolated from water collected from a cooling tower in Tokyo, Japan. The O.f.granulata produced the earthy/musty odor-producing substances geosmin and 2-methylisoborneol (2-MIB). Chlorophyll a and the levels of both odor compounds were markedly increased at 1000 lux compared to those at 500 and 2000 lux illumination. After a 40-day incubation, 338g/l of 2-MIB and 5.9g/l of geosmin were found in the No.11 culture medium. With incubation in CT liquid medium, a level of 2-MIB that was 3.1 times higher than that in the No.11 culture medium was obtained. Metabolites in the culture of O.f.granulata were identified using atomic emission detector-gas chromatography (AED-GC) and gas chromatography/mass spectrometry (GC/MS). The AED-GC analysis revealed many peaks containing C, H, O atoms as well as 1 peak of nitrogen on the GC chromatogram, but there were no chlorine-, bromine- or sulfur-containing peaks. The GC/MS analysis identified 6 terpenoids (e.g., eudesmol and sesquiterpene alcohols), 3 phenols (e.g., phenol and BHT), 6 aldehydes (e.g., nonanal, decanal and undecanal), 8 fatty acids (e.g., penta-, hexa- and octadecanoic acid), 8 hydrocarbons (e.g., n-heptadecane, methyl heptadecane and octadecane) and phytol.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

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