Chemical vapor deposition

Effect of temperature Temperature has a profound influence on the rate of all processes occurring in living organisms including fungi and it may determine the type of reproduction, the morphology of the organism and the nutrients required. For any particular organism, the minimum and maximum temperatures are the lowest and highest at which growth occurs, and the optimum is that at which the growth rate is the greatest.Majority of fungi are mesophylls and grow at moderate temperature.These values…

The synthesized molecules referred as E-and Z-isomers on the basis of NMR Spectroscopic data as reported. Conversion of E-isomer to Z-isomers take place by the process of photoisomerisation, chemical shift and differences between E-and Z-isomers in proton NMR spectral data was useful parameters for ascertaining to stereochemistry. All this synthesized molecules showed antioxidant activity using superoxide (NBT) and DPPH free radical scavenging…

New ultraviolet (UV) curable prepolymer, 2–hydroxy–3–[p–(1–{2–hydroxy–3–(isopro– phenylcarbonyloxypropoxy) phenyl} methylcyclohexyl) phenoxy] propyl acrylate (BISCHDA) was synthesized by the reaction of p–[1–(p–hydroxyphenyl) methylcyclohexyl] phenol with methylcyclohexanone, epoxidation with epichlorohydrin followed by addition reaction with acrylic acid. All synthesized compounds were characterized by 1H-NMR, 13C-NMR and FT-IR spectroscopy. Several UV-curable formulated solutions were prepared…

started in the Industrial Revolution, hydrochloric acid is used in the chemical industry as a chemical reagent in the large-scale production of PVC plastic, and MDI/TDI for polyurethane. It has numerous smaller-scale applications, including household cleaning, production of gelatine and other food additives, descaling, and leather processing. About 20 million tonnes of hydrochloric acid are produced worldwide annually. Chemical properties and reactions: Hydrogen chloride (HCl) is a monoprotic…

polymerization reaction is called as polythene. Globally about 80 million tons of polyethylene is produced. The important application of the polymer is for packing. The monomer used in this reaction is C2H4. The monomer is usually produced from petro chemical process or by dehydration of ethanol. The most widely used catalyst for the polymerization of ethylene are titanium(III)chloride which is popularly called as the Ziegler Natta catalyst and also Philips catalyst is widely used. The…

CHAPTER 4 RESULT AND DISCUSSION 4.1 Preparation of Bis-Thiourea Derivatives The mixture of heptanoyl chloride and ammonium thiocynate with 1,4-phenylene diamine appeared as homogeneous solution. White precipitate was formed immediately when the solution was filtered into the beaker containing ice cubes. Then, the precipitate was filtered again and rinsed by ethanol before being dried in the desiccator. The physical data of the synthesized bis-thiourea derivatives are shown in Table 4.1.…

of HBT. The CBNP is well adhered to the surface of HBT. This property increases the surface contact of HBT with paper and blackening effect in photocopies. 9. EDAX Analysis Energy Dispersive X-ray Analysis is widely used technique to analyse the chemical composition of a material under SEM. X-ray data is processed to obtain the percentage of each measured element in the individual particles. Table. 2. Hybrid Black Toner – Case 1 Element Apprx. Conc. Intensity Corrn. Weight % Weight% Sigma…

Despite that silicon, iron and phosphate are distinct chemical elements, quartz and iron phosphate demonstrate very similar crystal structure, and this could be achieved through altervalent substitution based on the following equation: 2Si4+ → Fe3+ + P5+ As such, every two silicon ions in quartz is replaced…

The CGS framework retreats to a proposition in 1832 by the German mathematician Carl Friedrich Gauss to base an arrangement of supreme units on the three essential units of length, mass and time. Gauss picked the units of millimeter, milligram and second The centimetre–gram–second arrangement of units (truncated CGS or cgs) is a variation of the metric framework taking into account the centimeter as the unit of length, the gram as the unit of mass, and the second as the unit of time. All CGS…

Abstract. The theoretical treatment of the equilibrium structure of the derivatives was based on the DFT method using the functional B3LYP with the base 6-311 ++ G (d, p). To distinguish the molecular electrostatic potential surface (MESP), we used the principle of HSAB (Hard Soft Acid and Base), in order to have the centers of activity of a molecule and the effects of substitution on the systems of pyrazolooxazine. These have anti-inflammatory activities. In our work, we have applied methods of…