By By [Weapon X] [Weapon Xl] [Semiconductor Diode Characteristics] [Semiconductor Diode Characteristics] Abstract The purpose of this experiment was to investigate a semiconductor diode’s characteristics and its temperature dependence. The received data showed that the for the diode charters tics part of the experiment, there were close to no errors. While testing the temperature dependency of the diode it was found out of the three different temperatures of Hot Water, Room Temperature
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Statement of Goals The goal of the group project was to calculate the percent calcium in a natural calcium tablet from Prime Eastern Pharmaceuticals in order to compare it with the reported amount of 800 mg of calcium per tablet to determine the validity of complaints regarding a reduced amount of mineral in the multivitamin. The quantitative determination of the analyte was accomplished through three experiments: complexometric titrimetry, flame atomic absorption analysis, and potentiometry using
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1. Introduction Hydrogen (H2) is a handy energy carrier that can be used in a variety of applications and ultimately constitutes a potentially substitute for petroleum products [1]. Hydrogen is often stored in gaseous or liquid forms. However, the storage of hydrogen in the form of metallic hydrides is a promised method and presents various advantages, mainly higher density of storage and safety issues [2]. The research and the development of new hydrogen storage materials opened new possibilities
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Chromatography is commonly used to separate mixtures to determine different chemical components. The main types of chromatography include gas, thin layer, paper and column chromatography. Generally used most, paper has a stationery phase and a mobile phase in a chromatographical experiment. The stationery phase is the paper itself absorbing the solvent, while the mobile phase is the solute moving up the strip of paper. Solvents are solids, liquids or gasses that dissolve the solute, in this instance
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Introduction A rotocopter is a smaller simpler version of a helicopter. The rotocopter displays two simple blades that are re shaped into a rectangle a circle and a triangle as the experiment is conducted. These results allow us to determine how the blade shape affects a rotocopter’s flight time. Although the helicopter looks to be complex and maculate the helicopter and the rotocopter have many similarities. Such as each depending on rotors and how the rotors are designed. The aircraft in
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1. Introduction: Enzymes such as amylases, cellulases, xylanases and proteases are widely used in the industry for the manufacture of pharmaceuticals, foods, beverages and confectioneries as well as in textile and leather processing, and wastewater treatment. The potential applications of amylases, cellulases, xylanases and proteases in biotechnology have already been reviewed. The majority of the enzymes used in the industry are of microbial origin because microbial enzymes are relatively more stable
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Introduction Buffer is a solution that resists a change in pH when bases or acid are added. Solutions that are acidic contain high concentrations of hydrogen ions (H+) and have pH values less than seven. Buffer usually consist of a weak acid, and its conjugate base or a weak base and its conjugate acid. The function of buffer is to resist the changes in hydrogen ion concentration as a result of internal and environmental factor. This buffer experiment is important so that we relies the important
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4.1 Chemicals The magnetic particles Dynabeads® MyOneTM Carboxylic Acid were from Invitrogen (Life Technologies, Van Alley, CA, USA). The hepcidin standard was obtained from Peptide Institute Inc (Osaka, Japan), N-ethyl-N’-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and 2-(N-morpholino)-ethane sulfonic acid (MES) from Calbiochem® (Merck), and phosphate buffer saline (PBS) from Sigma Aldrich. The solvents used, such as formic acid and acetonitrile, were LC-MS grade and were purchased
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1.1. INTRODUCTION Spasticity is a condition in which certain muscles are continuously contracted. This contraction causes stiffness or tightness of the muscles and can interfere with normal movement and speech. Spasticity is usually caused by damage to the portion of the brain or spinal cord that controls voluntary movement. The damage causes a change in the balance of signals between the nervous system and the muscles. This imbalance leads to increased activity in the muscles. Spasticity negatively
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methanol. The oligomers were characterized by gel permeation chromatography, GPC/SEC analysis were performed by eluting THF solutions of the polymeric samples at 30 ºC (Waters oven) in two PolyPore columns (protected by a PolyPore guard column) (Polymer Labs) mounted on a Waters 1515 isocratic HPLC pump. Detection was performed by a Waters 2414 differential refractive index detector. The THF eluent was filtered through 0.45 µm PTFE Pall membrane filters and degassed in an ultrasound bath. Solution samples
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