HPLC detection and quantification of polyphenolic compounds Detection and quantification of selected phenolic compounds in the ethanol extract were determined by HPLC-DAD analysis as described by Ismet et al. [13] with some modifications. It was carried out on a Dionex UltiMate 3000 system equipped with quaternary rapid separation pump (LPG-3400RS) and photodiode array detector (DAD-3000RS). Separation was performed using Acclaim® C18 (5µm) Dionex column (4.6 x 250 mm) at 30 ºC with a flow rate of
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ALYSSA MIKHAELLA J. LAZARO ANDREA JOYCE D. OLAES MA. JOLINA A. YANELA Cavite National High School IV-Alexandrite TABLE OF CONTENTS I. ABSTRACT 3 II. METHODOLOGY 4 III. INTRODUCTION 5 Background of the Study 5 Statement of the Problem 5 Significance of the Study 5 Scope and Limitation
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or revamped LAB complex operates most efficiently and produces the highest quality product.LAB is the primary raw material used in the production of linear alkyl benzene sulfonate (LAS). LAB is produced from benzene and long chain normal paraffins. Normal paraffins are commonly derived from kerosene using the Molex process.UOP technology is a key element in the production of LAB. Almost all new LAB complexes built in the last two decades have used UOP technology. UOP also specializes in the development
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thermotherapy is Paraffin wax. Paraffin wax was first produced commercially in 1867‚ paraffin wax precipitates readily
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component. The following candle compositions were used: 100 percent paraffin wax; 90 percent paraffin and 10 percent oil; 80 percent paraffin and 20 percent oil; 70 percent paraffin and 30 percent oil; 60 percent paraffin and 40 percent oil; 50 percent paraffin and 50 percent oil. The firmness‚ texture‚ and light intensity of the candles were tested and compared. Results of the tests showed that the candle made from 100 percent paraffin wax had the lowest melting rate‚ lowest amount of melted candle
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Esophageal benign stricture is the pathological stricture caused by any disease in esophageal antrum. In addition‚ the external pressure of the mucosal ring and the mediastinal tissue can also cause esophageal stricture. Benign stricture of the esophagus (BSE) can severely reduce quality of life and cause major complications such as aspiration‚ weight loss and malnutrition [1]. Esophageal stent implantation has been widely used in clinical practice‚ and this surgical method effectively alleviates
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alternative energy sources for use in order to reduce energy expenses. Users particularly in low income households continue to use a variety of other energy sources. Other sources include solar energy‚ wind energy‚ hydrocarbon fuels wood‚ coal and paraffin and own power generation using generators. GRID ELECTRICITY Grid electricity from Eskom is the most common source of energy for household consumers in South Africa and in 1997 it provided around 66% of the overall household energy supply.
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embedding For infiltration process‚ a small block of paraffin was placed in 500 ml beaker and was melted in the oven. The melted paraffin was poured into embedding mold and then‚ tissue sample was placed in paraffin wax filled mold. The base of tissue cassette was placed on top of the mold and was attached by adding further melted paraffin. The tissue specimen block was solidified at room temperature. The cassette that was filled with melted paraffin provided a stable base for clamping the rotary microtome
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Paraffin is purified from crude oil‚ and is thus a petroleum product. Petroleum is formed in the Earth in a natural process over the period of millions of years. Paraffin is a mixture of molecules made of carbon and hydrogen. The hydrogen and carbon composition of paraffin is the reason it is classified as a hydrocarbon. Although paraffin is comprised of a variety of different molecules‚ a typical molecule contains 25
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grievances. The report that comes from from such a survey will identify both organisational strength and weakness. INDUSTRY PROFILE IN his paper read before the Institution of Petroleum Technologists on December 11‚ 1934‚ on the “Utilization of Paraffin Wax and Petroleum Ceresinâ‚ Mr. P.
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