It is generally assumed that the toxicity of streptozotocin is dependent upon the DNA alkylating activity of its methylnimethylnitrosourea moiety‚ especially at the O6 position of guanine. The transfer of the methyl group from streptozotocin to the DNA molecule causes damage‚ which along a defined chain of events‚ results in the fragmentation of the DNA. Protein glycosylation may be an additional damaging factor . In the attempt to repair DNA‚ poly(ADP-ribose) polymerase (PARP) is overstimulated
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carbohydrate fermentation of corn starch or molasses. The ready availability of propylene in the 1960s led to routes based on the dehydrogenation of isopropyl alcohol or cumene peroxidation. (1) By Cumene Oxidation (Hock Process). Propene is added to benzene [71-43-2] to form cumene [98-82-8]‚ which is then oxidized by air to cumene hydroperoxide‚ and cleaved in the presence of an acid catalyst like zeolite. Phenol [108-95-2] and acetone [67-64-1] produced in the process are recovered by distillation
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routes is reviewed. Production of KA oil from phenol is also covered‚ as is the Asahi process for cyclohexanol production from benzene via cyclohexene. Appropriately adjusted nitric acid oxidation is appended to each of these processes. Solutia‚ working with the Boreskov Institute of Catalysis (BIC) in Russia‚ has developed a one step process to manufacture phenol from benzene‚ using nitrous oxide for the oxidation step. Thus‚ by coupling phenol production and adipic acid production‚ Solutia has
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residue that can stain smokers’ teeth‚ fingers and lungs. Arsenic It can cause cancer as well as damaging the heart and its blood vessels. It can interfere the ability of repairing our dna. Benzene a solvent used to manufacture other chemicals‚ including petrol. It is well-established that benzene can cause cancer‚ particularly leukaemia. Cadmium a metal used mostly to make batteries.the amounts of cadmium present in tobacco smoke are capable of affecting our health and It is a known cause
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stronger than Tums. Procedure: 1) Crush 2 small Rexall’s and put in a flask. 2) Crush 1 Tum and put in a flask. 3) Poor 25ml of warm water in each flask. 4) Let flasks sit for 6 minutes and swish around fluids every 20 seconds. 5) Add 5 drops of methyl orange to each flask. 6) Record observations. 7) Add 1ml of NaOH until you see a color change (both flasks are the same color) 8) Record amount of NaOH used for each antacid. 9) The flask that needed the least NaOH is best/more effective. 10)
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packaging material. Though lot of engineering goes into it‚ but the basic principal remains the same. Heat treatment is an approved Quarantine treatment under international standard for phytosanitary measures (ISPM-15) and it is an alternative to Methyl bromide fumigation treatment for wood packaging material of the export consignment. "Heat Treatment vs. Fumigation" HT is an eco-friendly method with least detrimental affect on the environment‚ especially during
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Page : First Issued : Revised : Product‚ MSDS No. : 1 of 9 Jan 01‚ 2011 July 01 ‚2011 MMA‚ M-001 MATERIAL SAFETY DATA SHEET 1.CHEMICAL PRODUCT AND COMPANY IDENTIFICATION PRODUCT NAME : Methyl Methacrylate SYNONYM(S) : Methyl 2-methyl-2-propenoate GENERAL USE : Acrylic resin‚ SB Latex‚ Paints‚ etc. MANUFACTURER Company Name : PTT Asahi Chemical Company Limited 2.HAZARDS IDENTIFICATION EMERGENCY OVERVIEW Highly flammable liquid with a flash point of 10℃. Since
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Analysis of Oxygen Bearing Organic Compounds James Matthew Jocson*‚ Gianvittorio Lanta‚ Chiqui Ann Llamado‚ Jeron Manaig College of Science Department of Biology University of Santo Tomas‚ Manila‚ Philippines Abstract Five oxygen-bearing organic compounds were given namely Methanol‚ 2-propanol‚ tert - butanol‚ formalin‚ and acetone. Different tests were done to each sample to differentiate their characteristics. These test were Dichromate test‚ Tollens Test‚ DNPH test‚ Iodoform Test‚ and Lucas
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test for the presence of acids or bases in a substance. Some are available in paper form (litmus) and others in liquid form (methyl orange). INDICATOR | COLOR IN ACID | COLOR IN BASE | LITMUS | RED | BLUE | PHENOPTHALEIN | COLORLESS | PINK | METHYL ORANGE | RED | YELLOW | SCREENED METHYL ORANGE | RED | GREEN | BROMOTHYMOL BLUE | YELLOW | BLUE | THE pH SCALE The strength of an acid or base is indicated
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ester and there are two esters that are very close in molar mass‚ methyl acetate and ethyl formate. The methyl acetate and the ethyl formate both have a molar mass of 74.08 g/mol [5][6]. The last step is to distinguish between the two. Both methyl acetate and ethyl formate are described as having a “fruity odour”‚ relatively close boiling points and the same colourless appearance [5][6]. However‚ there is one source that says that methyl acetate has a “characteristically pleasant smell reminiscent of
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