The natural plant exudate gum tragacanth is obtained from the stem of the bush like plant “goat’s-horn”‚ Astragalus species. Gum tragacanth has been used commercially for well over 2000 years and is currently widely used as a thickener and emulsifier in emulsion systems in different pharmaceutical‚ food‚ cosmetic and diverse industrial uses. In addition‚ it is on the list of stabilizers that are permitted by Food and Agriculture Organization/ World Health Organization that could be used during the
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random process * Systematic – * Stratified-Random – division into parts‚ layers * Cluster – divided into subgroups * Composite – two or more samples are combined 3. Mixed – combining other sampling scheme Types of samples taken in Lab: * Raw mat * Processed control sample * Finished products * Buying samples Methods used in DISINTEGRATION: * Mechanical > tools * Ball mills * Meat mincers * Tissue grinders * Enzymatic and Chemical CHARACTERISTICS
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Experiment 11 Title: Spectrophotometric analysis of caffeine and benzoic acid in soft drink. Name: Tan Herh Lim Name of partner: Sia Ting Wai‚ Chong Zheng Yee Date: Lecturer: Dr. Neo Kian Eang Practical class: P1 Objective: To obtain the absorbance of the caffeine and benzoic acid in soft drinks. Introduction Soft drinks that commonly found in our daily life contain caffeine and sodium benzoate. The caffeine act as a stimulant and the sodium benzoate acts as a preservative
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v.13‚ p. 79 – 81. 17. Yokota‚ Fumiaki‚ Shimizu‚ Aviko‚ Gshizuka‚ Toshio and Morikawa Hisashi (2000). Bunseki Kagaku‚ v.49‚ p.765 – 769. 18. Satyanarayana‚ K (1996). Atomic Spectroscopy‚ v. (17)‚ p. 69 – 76. 19. Winge‚ R.K.‚ Fassel‚ V.A.‚ Peterson‚ V.J and Floyd‚ M.A (1985). Inductively Coupled Plasma atomic emission spectroscopy – An atlas of Spectral Information‚ Physical Sciences Data‚ Elsevier‚ Amsterdam‚ p. 20. Govindaraju‚ K (1994). Geostandards Newsletter‚ v. 18‚ p.19. Table 1 - Operating parameters
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Micah Bolivar MWF 8:30-9:30 ULTRAVIOLET-VISIBLE SPECTROMETRY A diagram of the components of a typical spectrometer are shown in the following diagram. The functioning of this instrument is relatively straightforward. A beam of light from a visible and/or UV light source (colored red) is separated into its component wavelengths by a prism or diffraction grating. Each monochromatic (single wavelength) beam in
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The extinction law for actinic monochromatic light absorbed by a substance layer can be written in the exponential or logarithmic form: I ¼ I0 Á 10ÀeCd ; V.S. Saakov et al.‚ Derivative Spectrophotometry and Electron Spin Resonance (ESR) Spectroscopy for Ecological and Biological Questions‚ DOI 10.1007/978-3-7091-1007-2_2‚ # Springer-Verlag Wien 2013 (2.1) 5 6 2 lgðI0 =IÞ ¼ eCd; Basis of Derivative Spectrophotometry (2.2) where I0 and I are light intensity before and
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spectrophotometric analysis of copper sulphate Introduction: In the modern usage. The term spectroscopy includes a large group of techniques which differ widely in their mode of application and information they reveal. As a useful working definition‚ spectroscopy is a study of interaction of electromagnetic radiation with matter in the experiment it means it’s the usage of ultra-light to measure the absorbance of the copper sulpate. The regions of the electromagnetic spectrum immediately adjacent
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Abstract Pigments extracted from different greens have different polarities and may be different colors. Mixed pigments can be separated using chromatography paper. Chromatography paper is able to separate mixed pigments due to their polarity and solubility. Pigments of chlorophyll a‚ chlorophyll b and beta carotene will be separated on chromatography paper because each has its own polarity and solubility‚ which results in different distance traveled up the paper. Beta carotene is non-polar so it
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INTRODUCTION: In atomic spectroscopy the samples are vaporized at 2000-8000k. The process of this involves two steps ‚ one is atomization of sample and the other is absorption of light radiation from light source. The atoms in the vapour are measured by absorption or emission at characteristic wave lengths. The main usage of this was to detect one element from another in the complex sample which has taken ie.‚ it has ability to perform multiple element analyses. Absorbance should obey Beer’s law
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Culture and Science University‚ Tehran‚ Iran b c a r t i c l e in f o Article history: Received 21 April 2010 Received in revised form 14 August 2010 Accepted 18 August 2010 Available online 26 August 2010 Keywords: HSA Lomefloxacin Colchicine Spectroscopy Molecular dynamic a b s t r a c t Combination of several drugs is often necessary especially during long-term therapy. The competitive binding drugs can cause a decrease in the amount of drug bound to protein and increase the biological active
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