kemerosotan dalam makanan disebabkan oleh pengoksidaan. Pg 285 Daftar II 3 4/4/2013 Preservatives Classification Preservatives Natural Organic acids Citric Benzoic Synthetic Vitamin C Antimicrobials Calcium propionate Sodium nitrite Disodium EDTA Sodium nitrate Sulfites Antioxidants
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potential‚ the sodium potassium pump is turned off. When a stimulus is applied to a neurone‚ the resting potential is (-70mV) is reversed – this is the action potential (depolarisation). The energy of the stimulus causes the intrinsic sodium voltage-gated channels to open‚ allowing sodium ions to diffuse into the axon along their electrochemical gradient. Entry of these Na+ ions causes the inside of the axon to be less negative. As threshold is reached‚ there is a greater influx of sodium ions and the
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Assignment 20 A 1- Which of the following oxidation numbers in the species given is incorrect? a) SO32−; S +4‚ O −2 b) ClO3−; Cl +5‚ O −2 c) H2C2O4; H 1+‚ C 3+‚ O 2− d) H2O2; H +1‚ O −1 e) Ca(ClO)2; Ca +2‚ Cl +2‚ O −2 f) Zn(NH3)6Cl2; Zn 2+‚ N 3−‚ H 1+‚ Cl 1− (Cl is +1 in this compound. Ca: 1 × (+2) = +2. O: 2 × (−2) = −4. Charge on the compound = 0; therefore‚ (+2) + (−4) + 2 × Cl = 0. The charge on Cl is 1+.) 2- A voltaic cell is constructed. One electrode compartment consists of a zinc strip placed
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distilled water to dissolve the sodium carbonate until 250 ml of solution were made. I had to calculate‚ from the information provided‚ how much sodium carbonate to use in the making of the solution. Using the volume and concentration of the solution‚ I was able to calculate the moles of the solution (concentration x volume). Using the periodic table I was able to calculate the molar mass of sodium carbonate which was 106‚ from this I could calculate the mass of the sodium carbonate I needed to make the
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Overweight patients must be given a weight control diet; Heart failure patients may often be anorexic‚ If the patient in underweight they must be fed a palatable formulated diet that have added nutrients‚ potassium and magnesium‚ (and decreased sodium). Exercise should be restricted to small amounts only and stress at home should be minimised. The pet should return to the clinic for regular rechecks and the pets’ home respiratory rate should be recorded and passed onto the Veterinarian to record
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as paracetamol) is synthesized using Sodium Ethoxide Iodine‚ which is the Williamson Ether synthesis. Experimental: Sodium metal was patted dry to remove any oil and was cat into small pieces. A dry 100cm3 round bottom flask was placed on a cork ring‚ on a balance and tarred sodium metal (0.6g) was placed into the flask. The flask was then attached to the dry reflux condenser and industrial methylated spirits (IMS‚ 15cm3) was added. Once all of the sodium has dissolved the solution was cooled
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were incubated for an hour at 37℃. Trichloro-acetic acid solution was then added to the first 2 of the 4 test tubes prior to centrifugation at 2500g. Solid ammonium sulphate and freshly prepared sodium nitroprusside were added to these tubes and colour observations made. For the remaining 2 tubes sodium nitroprusside and aqueous pyrrolidine were added to the supernatant and colour changes observed. INTRODUCTION/LIERATURE REVIEW Three alternative catabolic routes are taken by the pyruvate formed by
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SEMESTER- I PRACTICAL- I VOLUMETRIC ANALYSIS The method to determine the exact amount of the substance in a given sample is termed as quantitative analysis volumetric analysis is a branch of quantitative analysis involving accurate measurement of volumes of reacting solutions. The volumetric analysis is very much in use due to simplicity rapidity accuracy and wide applicability. The reacting substances are taken in the form of solutions and made to react. The concentration of one solution is
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PRESENTATION BY: GIZELLE WILKINSON SUBJECT: ESSENTIAL HYPERTENSION STUDENT NUMBER: M00037713 CLINICAL SCIENCES II INTRODUCTION Essential hypertension‚ otherwise known as primary or idiopathic hypertension‚ is a condition of raised blood pressure with no identifiable cause. Secondary hypertension occurs when blood pressure elevation results from a specific and potentially treatable cause. These include renal diseases‚ endocrine causes‚ congenital cardiovascular causes
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we measured the rate a balanced oxidation/reduction reaction between iodine‚ hydrogen‚ and bromate ion occurs. The above reaction occurs slowly so we used a coupled iodine clock reaction to measure the rate of the oxidation/reduction reaction because it occurs much faster but is still dependent upon the other reaction. To accomplish this‚ two mixtures were prepared in separate Erlenmeyer flasks. In the 250 ml flask .010M potassium iodide‚ .0010M Sodium thiosulfate and distilled water was prepared
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