A study on the stability of anhydroecgonine methyl ester (crack biomarker), benzoylecgonine, and cocaine in human urine

In the manufacture of detergents still using surfactants (which serves as an emulsifier) of crude oil in the form of the AS. (alcohol sulfate) and LAS (linear alkylbenzene sulfonate), where this type of surfactant cannot be degraded by microorganisms when discharged into the environment, causing environmental pollution. Methyl ester sulfonate surfactant is an anionic surfactant which has a composition of C16 - C18 fatty acids are capable of acting against nature deterjensinya, while the C12 - C14 fatty acids contribute to the foaming effect. The purpose of this study was to look for the formulation of methyl ester sulfonate (MES) the right to produce a good detergent by using materials such as methyl ester sulfonate surfactant self-made, methyl ester sulfonate and sodium lauryl market Ester Sulfate (SLS) with a concentration of 15 %, 20 % and 25 %. Detergent results of the study have high detergency ( net ) compared with the detergency of detergent commercial, have a stable emulsion stability, the stability of the foam/foam detergent power made from methyl ester sulfonate surfactant produces less foam, compared with a detergent made from SLS and surfactant SNI 06-4075-1996 standards.

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Cocaine, Benzoylecgonine and Ecgonine Methyl Ester Determinations in Post Mortem Human Urine and Blood by Gas Chromatography and Capillary Gas Chromatography after “Extrelut®” Extraction

Developments in Analytical Methods in Pharmaceutical, Biomedical, and Forensic Sciences ◽

10.1007/978-1-4899-3526-7_15 ◽

1987 ◽

pp. 129-141 ◽

Cited By ~ 1

Author(s):

R. Froldi ◽

V. Gambaro ◽

A. Groppi

Keyword(s):

Gas Chromatography ◽

Methyl Ester ◽

Human Urine ◽

Capillary Gas Chromatography ◽

Post Mortem ◽

Ecgonine Methyl Ester

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Stability and Emission Characteristics of Diesel-Ethanol-Coconut Methyl Ester Blends for the Diesel Engines

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.49703 ◽

2015 ◽

Vol 14 (2) ◽

pp. 1

Author(s):

Tanti Ardiyati ◽

Nathaniel P. Dugos ◽

Susan A. Roces ◽

Masaaki Suzuki ◽

Kusnanto Kusnanto

Keyword(s):

Methyl Ester ◽

Diesel Engines ◽

Emission Characteristics ◽

Test Results ◽

Fuel Blends ◽

Fuel Consumption Rate ◽

Efficient Combustion ◽

Smoke Opacity ◽

The Stability ◽

Blended Fuels

The stability and emission characteristics of diesel-ethanol-coconut methyl ester (CME) blends were studied to determine the most suitable fuel blends to be applied in diesel engines. This is done in order to assess the potential of the blends as a substitute for commercially available diesel fuel used in diesel engine. The stability results of the blends using 100% and 99.5% ethanol purity showed that the fuel blends containing ethanol up to 10% and CME of 5% and greater exhibited high mutual solubility at any temperature range and were resistant to microbial growths after 3 months storage. Engine operations at low speed especially at idle-no load and using a bigger size engine lead to a minimum ignition delay and result in lower fuel consumption rate. The emission test results with the new- blended fuels showed a reduction in CO2 and increasing percentage by volume of CO2 compared to commercially available diesel. The blends could deliver an efficient combustion and could run efficiently since production of the CO2 gases is higher than that of CO. The blends of 80% diesel, 5% ethanol, 10% CME; and 80% diesel, 10% ethanol, 10% CME could reduce the smoke opacity compared to commercially available diesel.

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Outstanding Characteristics of Thrombokinase Isolated from Bovine Plasma

The Journal of General Physiology ◽

10.1085/jgp.47.2.315 ◽

1963 ◽

Vol 47 (2) ◽

pp. 315-327 ◽

Cited By ~ 16

Author(s):

J. H. Milstone ◽

N. Oulianoff ◽

V. K. Milstone

Keyword(s):

Methyl Ester ◽

Continuous Flow ◽

Deae Cellulose ◽

Stability Curve ◽

Bovine Plasma ◽

Rapid Production ◽

The Stability ◽

Ph Range ◽

Single Boundary ◽

Electrophoretic Fraction

Thrombokinase has been isolated from bovine plasma by a procedure which begins with the highly purified product of a previously described method, chromatographs it on DEAE-cellulose, and then fractionates it by continuous flow electrophoresis, yielding 0.2 mg per liter of oxalated plasma. The electrophoretic fraction has shown a single boundary in the ultracentrifuge; and its esterase activity on toluenesulfonylarginine methyl ester has been about the same as that of thrombokinase previously isolated by repeated electrophoretic fractionations. Thrombokinase is a euglobulin with minimum solubility near pH 5.0. It is most stable within the pH range 7.5 to 9.5; but there is also a peak in the stability curve near pH 1.8. A few micrograms of thrombokinase per milliliter can activate prothrombin in the presence of EDTA. A few thousandths of a microgram causes rapid production of thrombin in the system: prothrombin, thrombokinase, calcium chloride, phosphatide, "accelerator." But, thrombokinase has less than 1/175 the proteolytic activity of crystallized trypsin.

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