Carbon-14

INTRODUCTION Fatty acid is a carboxylic acid with a long aliphatic chain, which is either saturated or unsaturated. Most of the naturally occurring fatty acids contain unbranched chain of an even number of carbon atoms, from 4 to 28. We usually derived fatty acids from triglycerides or phospholipids. Fatty acids are very important sources of fuel because, when they metabolized, they yield large amount of ATP .Fatty acids are regulated by certain transcription factors which control the action of…

The running joke about the Super Hornet is that it is a “jack of all trades, and master of none”. The truth is that the Hornet and specifically the Super Hornet has been required to replace the F-14 Tomcat, the S-3 Viking and the A-6 Intruder. That required the Super Hornet to effectively satisfy the mission sets of three aircraft. Boeing was responsible for ensuring that the airframe could handle that challenge, and succeeded in most cases. What Boeing was not contracted to solve, however, was…

In this work we have prepared ceramic-polybenzoxazine composites based on poly(P-ddm) as matrix reinforced by 0, 3, 5, 7, 10, 15, and 20 wt.% of GX-540 silane-treated nano-Cr2O3 filler via a solution blending method in THF. These nanocomposites are used as new organic coating materials. The effect Cr2O3 nanofillers inclusion on the viscoelastic properties of poly(P-ddm) is studied using dynamic mechanical analysis (DMA). Figure 76 illustrates the change in the storage modulus at 50oC and…

Main Group Elements Organometallic Compounds: The compounds which contain at least one direct metal to carbon covalent bond are known as organometallic compounds many of these are thermodynamically unstable and are pyrophoric. The meta may belongs to main group, transition metal, f group metal or a metalloid i.e. selenium, boron, arsenic, silicon, antimony, germanium, and tellurium and the carbon moiety may be alkyl, alkene, alkyne, carbonyl, cyclic, heterocyclic or aromatic.1 Historical…

called atoms. ____ 3. Diamonds and graphite are both made of carbon atoms. Why do they have different properties?…

Chemistry Task 2 Portfolio Outline and examine some uses of different metals through history, including contemporary uses, as uncombined metals or as alloys. Metal/Metal Alloy Uses Throughout History Copper - Used to make ornaments and domestic utensils in historical times (not as tools as it is a soft metal) - In modern times used in electrical wiring, pipes and plumbing fittings, jewellery, decoration, - This is due to its malleability, ductility and good electrical conductivity. Bronze…

goal of the OMCVD process, to produce zero-valent state of metal element with existing technology and producing units is only possible for the Ni(CO)4. The processes which apply other precursors usually produce the thin film of metal polluted by the carbon or…

or gases in room temperature and are generally rather poor conductors of thermal energy (heat) and electricity. They furthermore possess lower densities, boiling and melting points than metals. There may be certain rule-breakers, however, including carbon, which is a relatively good conductor of electricity. Yet, it retains all other properties associated with nonmetals aside from that single difference. Opposed to metals, nonmetals are additionally nonmalleable, or resistant to shattering, and…

macrocyclic organic molecules Phthalocyanines (1) which are comparable to the naturally occurring porphyrin (2) ring systems shown in (Figure 1). The porphyrin molecule consists up of four pyrrole subunits which are associated in n-conjugation by methine carbons. 1 2 Figure 1: structures of phthalocyanine and porphyrins molcule The compound Phthalocyanine molecule consist of four…

Background Benzo(a)pyrene (BaP), a polycyclic aromatic hydrocarbon(PAH) when infiltrated within the body of humans and animals undergoes a series of chemically modified changes to form a number of metabolites that are known to elicit portentous and toxic effects (4). Benzo(a)pyrene has a chemical formula of C20H12 and is considered a Group 1 Carcinogen by the International Agency for Research and Cancer (IARC) (7, 11). It is composed of a cyclic structure and crystals appear to be pale yellow…