Chemical vapor deposition

Also, it is used in immersion deposition for all surface replaceable ions to become tin. However, to attain good results, a good base metal preparation is needed. It is an environment-acceptable process and has a low cost. In electrodeposition, it is used as an alternative for tin-lead and cadmium coatings due to its good solderability and corrosion resistance. But, formation of thin whiskers can also be observed. It can also be used in hot dipping, autocatalytic deposition and spraying (Harper,…

Chemical Reactions I Purpose The purpose of this experiment was to test and see how four different chemical reaction worked. The four different chemical reactions are formation, decomposition, single-replacement, and double-replacement. The hypothesis of this experiment was that in each of the different reactions something would happen to the reactant whether it be color, mass, temperature, or pressure. II Equipment For this experiment Late Nite lab was used. In Late Nite Lab the equipment…

Rankine cycle Figure 2: Rankine cycle As mentioned earlier, the Rankine cycle also includes the possibility of superheating the vapor, as cycle 1–2–3–4–1. If changes of kinetic and potential energy are neglected, heat transfer and work may be represented by various areas on the T–s diagram. The heat transferred to the working fluid is represented by area a–2–2–3–b–a and the heat…

Paragraph 1 Iron phosphate structure with a symbol of FePo4, has crystal structures of FeO4 and PO4 as its tetrahedral links. There would be changes of this quartz type that can be determined by the neutron poly difraction between 294K and 1073K, according to Z. Kristallogr. While structural parameters of the iron phosphate depends on the temperature, whereby iron phosphate would be a beta-phase from an alpha-phase when temperature increases from low to high. Irregularity would also be…

Atoms are made up of three parts: protons (positively charged), neutrons (uncharged) and electrons (negatively charged). For example: Sodium ( ) has 11 protons, 12 neutrons and 11 electrons. 2. Molecule: Molecules form when two or more atoms form chemical bonds with each other. It doesn’t matter if the atoms are the same or are different from each other. For example: 3. Isotopes:…

III. RESULTS AND DISCUSSIONS: A. Characteristics of Aluminum-Graphite composites and the in-situ reaction To examine the reaction condition of carbon flakes and Al powders, 4 wt. % carbon flakes were added to Al powders. Fig. 1 shows the DSC plot obtained during heating and cooling of the green compact from room temperature to 750 0C and from 750 0C to room temperature at a heating/cooling rate of 3 0C /min under argon gas atmosphere. From the DSC heating curve it is evident that the total…

Phase 2 – Agarose Gel Electrophoresis 1. Obtain our four H, E, L, and P labeled micro tubes and place them on ice. 2. Set the micro pipet to 2.0 ul. 3. Transfer 2.0 ul blue dye to each of the four H, E, L, and P micro tubes. 4. Mix the four micro tubes by using this two-step method: * Place each tube briefly on the vortex to get the components to collect at the bottom of the micro tubes * Pulse spin the four micro tubes in the centrifuge to mix all of the components completely. 5.…

1.4 Effect of Microcrystalline Cellulose (MCC)Type Formula F12 was utilized to study the effect of changing the type of MCC(Avecil PH-101 ) as a carrier material instead of (Avecil PH-102) in F8 on the dissolution behavior of the prepared Zolmitriptan liquisolid ODTs. Although the DT of formula F12 (79 sec.) was greater than F8 (48 sec.) as in Table(18),the dissolution behavior of the formula F12 was faster than F8 as in Table (18) and Figure (48), this difference was non…

repulsive forces between atoms, molecules or ions, primarily as a result of electrostatic attractions; these forces act between discrete molecules. Intermolecular forces are weak forces but without them life as we know it would not be possible: water vapor would not condense into its liquid (or solid forms) if its molecules did not attract each other, and all matter, in fact, would exist as gases. The physical states of matter are commonly defined by their physical characteristics: a solid…

According to R.A Aitken, “An asymmetric synthesis may be defined as a synthesis in which an achiral unit is an ensemble of substrate molecules is converted to a chiral unit such that the possible stereoisomers are formed in unequal amounts.” It relates to any synthetic process that incorporates one or more new elements of chirality during a functional group transformation. Asymmetric synthesis involves the formation of chiral molecules. An object is said to be chiral, if it cannot be…