FORMIC ACID AS A SOLVENT FOR OZONIZATION INVESTIGATIONS

1940 ◽  
Vol 18b (1) ◽  
pp. 30-34 ◽  
Author(s):  
Rodger M. Dorland ◽  
Harold Hibbert
Keyword(s):  
Formic Acid ◽  
Ethyl Acetate ◽  
Organic Compounds ◽  
Aromatic Nucleus ◽  
Carboxyl Group ◽  
The Stability

The use of formic acid as a solvent in ozonization investigations has been developed and its suitability demonstrated by experiments on organic compounds of known structure. This solvent shows a remarkable tendency to protect the aldehyde from oxidation to the carboxyl group. The stability of the aromatic nucleus to ozone is apparently somewhat greater in this solvent than in ethyl acetate.

CONJUGATED OESTROGENS. I

1963 ◽  
Vol 43 (3) ◽  
pp. 345-360 ◽  
Author(s):  
Stanley Kushinsky ◽  
Jane (Wu) Tang
Keyword(s):  
Molecular Weight ◽  
Formic Acid ◽  
Ethyl Acetate ◽  
High Molecular Weight ◽  
Secondary Amine ◽  
Aqueous Ammonia ◽  
Organic Solution ◽  
Extraneous Material

ABSTRACT A convenient and mild procedure is described in this paper whereby free and conjugated oestrogens may be extracted from urine. The extracts containing approximately 90 per cent of the oestrogens are devoid of most of the extraneous material and may be reduced in volume to less than 1/15 of that of the urine. The procedure consists of the following steps: (1) a 10 per cent (v/v) solution of a high molecular weight secondary amine (Amberlite LA-2, Rohm and Haas) in ethyl acetate is washed with formic acid and water, (2) the oestrogens in urine (acidified to pH 2 or 3 with H2SO4) are extracted with the LA-2 solution, (3) the oestrogen fraction is back-extracted from the organic solution with dilute aqueous ammonia.

scholarly journals Exposure Studies of Different Kinds of Volatile Organic Compounds in Vapour Phase with a Narrow-gap Cell Containing CuxS Modified Carbon Microdisc Electrode

2018 ◽  
Vol 63 (1) ◽  
pp. 170-178 ◽  
Author(s):  
László Kiss
Keyword(s):  
Acetic Acid ◽  
Volatile Organic Compounds ◽  
Ethyl Acetate ◽  
Organic Compounds ◽  
Modified Electrode ◽  
Vapour Phase ◽  
Narrow Gap ◽  
Current Increase ◽  
Interelectrode Gap ◽  
Volatile Organic

In this article, the feasibility of the CuxS modified carbon microdisc electrode was examined by exposure to four different volatile organic compounds (2-propanol, acetic acid, ethyl acetate and n-butylamine) directly in their vapour phase using cyclic voltammetry and amperometry. The performance of the modified microdisc was compared with the bare carbon microdisc (30 μm in diameter) which was involved in a narrow-gap cell. By using both methods high current increase was observed for 2-propanol with the modified electrode and its sensitivity was sufficiently higher than with the bare electrode. The modified electrode showed lower current signals in case of acetic acid and n-butylamine. The latter formed a condensation layer at the interelectrode gap. Neither the bare nor the modified electrode was sensitive to ethyl acetate.

scholarly journals Synthesis of New N-Substituted Phenoxazine Derivatives

2016 ◽  
Vol 13 (2) ◽  
pp. 360-365
Author(s):  
Baghdad Science Journal
Keyword(s):  
Formic Acid ◽  
Ethyl Acetate ◽  
Hydrazine Hydrate

This work comprises the synthesis of new phenoxazine derivatives containing N-substituted phenoxazine starting from phenoxazine (1). Synthesis of ethyl acetate phenoxazine (2) through the reaction of phenoxazine with ethylchloroacetate, which reacted with hydrazine hydrate to give 10-aceto hydrazide phenoxazine (3), then reacted with formic acid to give 10-[N-formyl acetohydrazide] phenoxazine (4). Reaction of compound (4) with phosphorous pentaoxide or phosphorus pentasulphide to gave 10-[N-methylene-1,3,4-oxadiazole] phenoxazine (5) and 10-[N-methylene-1,3,4-thiadiazole] phenoxazine (6).

scholarly journals Gel Formulation of Ethyl Acetate Garlic Extraction and Its Activity Against Staphylococcus Epidermis

2019 ◽  
Vol 1 (2) ◽  
pp. 69-78
Author(s):  
Khairan Khairan
Keyword(s):  
Ethyl Acetate ◽  
Staphylococcus Epidermidis ◽  
Antimicrobial Activities ◽  
Phytochemical Screening ◽  
Viscosity Property ◽  
Antibacterial And Antifungal Activities ◽  
Staphylococcus Epidermis ◽  
Homogeneity Property ◽  
The Stability ◽  
Antibacterial And Antifungal

Garlic is known to have antibacterial and antifungal activities. This research aims to formulate the gel materials extracted from the garlic and to investigate the antimicrobial activities to Staphylococcus epidermidis. The phytochemical screening showed that the gel materials of ethyl acetate consisted alkaloid, flavonoid, and saponin substances. The formulation of gel was synthesized with different variations of 1, 5, and 10%. In this research, the gel materials were analyzed to understand the stability, homogeneity, pH, viscosity and dispersive powers.  The results showed that good abilities of gel based on the taste, aroma and consistency, while the homogeneity property of each samples is influenced by the presence of gel concentration. The viscosity property of gels accounted for 3201.02-1664.04 Cps with 2.95-3.8 cm of dispersive powers. The ability of antimicrobial showed that higher concentration of 5% and 10% gels showed greater inhibitory zones of 18,10 and 22,08 mm compared to 1% of concentration

A Simplified Assay for Porphyrins in Whole Blood

1971 ◽  
Vol 17 (6) ◽  
pp. 525-528 ◽  
Author(s):  
Samuel R Heller ◽  
Robert F Labbe ◽  
Janet Nutter
Keyword(s):  
Formic Acid ◽  
Ethyl Acetate ◽  
Whole Blood ◽  
Quantitative Assay ◽  
Clinical Use ◽  
Conventional Procedure ◽  
Simplified Procedure

Abstract Recent investigations concerning the significance of porphyrins in erythrocytes indicate a need for a rapid quantitative assay, easily adaptable to routine clinical use. To fill this need, we have developed a simplified procedure for the measurement of porphyrins (essentially protoporphyrin) in whole blood. Blood is stirred with acetone—ethyl acetate and the porphyrins are extracted with formic acid—ether. The porphyrins are then extracted into HCl and measured spectrophotometrically at three wavelengths, a procedure that allows a corrected absorbance to be calculated, to minimize error caused by interfering substances. The assay requires little apparatus, is simple and dependable, and the results correlate well with those obtained by use of a more complex conventional procedure.

scholarly journals Rapid synthesis of ultrasmall platinum nanoparticles supported on macroporous cellulose fibers for catalysis

2019 ◽  
Vol 1 (8) ◽  
pp. 2953-2964 ◽  
Author(s):  
Md. Tariqul Islam ◽  
Jose A. Rosales ◽  
Ricardo Saenz-Arana ◽  
Shahrouz J. Ghadimi ◽  
Juan C. Noveron
Keyword(s):  
Formic Acid ◽  
Organic Compounds ◽  
Platinum Nanoparticles ◽  
Catalytic Reduction ◽  
Cellulose Fibers ◽  
Hydrogen Gas ◽  
Rapid Synthesis

Synthesis of ultrasmall platinum nanoparticles supported on macroporous cellulose fibers for hydrogen gas and formic acid induced catalytic reduction of organic compounds in water.

Low Cost Microstructures for Preconcentration of Polar and Non-Polar Organic Compounds

2006 ◽  
Vol 514-516 ◽  
pp. 1250-1254 ◽  
Author(s):  
Lilian Marques Silva ◽  
Roberto R. Lima ◽  
Alexsander T. Carvalho ◽  
Maria Lucia Pereira Silva ◽  
Joana Catarina Madaleno ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Organic Compounds ◽  
Ethyl Ether ◽  
Low Cost ◽  
Surface Condition ◽  
3D Structure ◽  
Single Pulse ◽  
Polar Compound ◽  
Polar Organic Compounds ◽  
Adsorption Characteristic

Films produced by plasma polymerization of ethyl ether and methyl or ethyl acetate show good adsorption characteristic for polar and non-polar organic compounds. These films when used in microchannels machined in a 3D-structure present some preconcentration of organic compounds. Therefore, the aim of this work is to investigate the physical-chemical preconcentration mechanisms on this structure. The test molecules used were n-hexane and 2-propanol. Quartz crystal microbalance and mass spectrometry were used to measure preconcentration. Two different procedures for reactant injection on the structure were used: a continuous flow during several minutes or a small amount injected on a single pulse and in a few seconds. The microchannels were also modified by the introduction of small ceramic particles for enhancement of the flow dispersion. It was possible to notice for all films a similar kinetic of retention. The main removal mechanism is adsorption. Although all films can provide the removal of the adsorbents molecules, the most important characteristic for the adsorption and/or retention is the surface condition. Thus, the retention of polar compound can be troubled if a non-polar compound was used previously. The most promising films for retention are ethyl ether and ethyl acetate when n-hexane and 2-propanol are used as test molecules. The results using n-hexane or 2-propanol point out the use of low-cost microchannels for preconcentration development.

Theoretical Study on Thermal Hazardous Properties of C18H10O11 and C18H18O7 Organic Peroxides

2013 ◽  
Vol 787 ◽  
pp. 301-305
Author(s):  
Yun Bo He ◽  
Wei Wang ◽  
Shi Xiong Wang ◽  
Xiang Jun Yang ◽  
Hong Guo
Keyword(s):  
Molecular Structure ◽  
Thermal Decomposition ◽  
Quantum Chemistry ◽  
Organic Compounds ◽  
Theoretical Study ◽  
Organic Peroxides ◽  
Quantum Chemistry Calculation ◽  
The Past ◽  
Chemistry Calculation ◽  
The Stability

The thermal decomposition of organic peroxides are widely used as coagulant for organic compounds, however, its thermal hazardous characteristics have already caused serious accidents in chemical industries, which limited its application in much more strict conditions. Organic peroxides of C18H10O11 and C18H18O7 are two new candidates fitted for industrial explosive. However, as we best known there is little reports available on the geometry structure in the past decades. In this work, by means of quantum chemistry calculation, the relation of safety with molecular structure of C18H10O11 and C18H18O7 are discussed. The molecules with more activity O and the activity part more dispersedly exhibit higher stable, and the configuration has good safety. All the energy of molecule b is higher than that of molecule a. The stability of different configurations are 6a>7a>8a>9a>5a>1a>4a>3a=2a and 1b>7b>5b>6b>4b>2b>3b>8b, respectively, suggesting the structures of 6a,3a,2a,1b,8b exhibit high safety.

Sign in / Sign up

Export Citation Format

Share Document