what is phenol coefficient?
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A figure expressing the disinfecting power of a substance by relating it to the disinfecting power of phenol. Also called phenol coefficient
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In order to calculate the total phenolic content, it would be useful to have the formula!
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ñ = n - iκ\n\nHere, n is the refractive index indicating the phase velocity as above, while κ is called the extinction coefficient, which indicates the amount of absorption loss when the electromagnetic wave propagates through the material. Both n and κ are dependent on the frequency (wavelength).
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It sounds like an enzymatic assay for phosphatases. I did that myself a long time ago.\nIf I remember correctly 405 should be the wavelength at which you are measuring the absorbance, unless you mean that the value was 0.405\n\nYou need to make a standard curve: measure the absorbance for different samples of p-nitrophenol of known concentration (you prepare them yourself) and then do the plot absorbance vs concentration. You find the equation for the curve by linear regression and then you can use it to find out the concentration of p-nitrophenol in your samples. Be sure to have alkaline solutions in order to have practically all of the p-nitrophenyl molecules in the p-nitophenoxy form as the anionic form is yellow and the protonated colorless.\n\nThe exact math depend on the specifics of your experimental set-up.\n\nAs for the second question it is not very clear what you mean.
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The extinction coefficient is different for every compound.  Some of them are reported in the literature.  If you are doing a lab for a class and need it, you can probably get hints at your professor's office hours or it might be in some kind of handout.  Or you might be supposed to be calculating it from your data.  The extinction coefficient is a number that expresses how strongly a given compound absorbs light at a particular wavelength.
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Phenol formaldehyde resin\nFrom Wikipedia, the free encyclopedia\nJump to: navigation, search\nThe earliest commercial synthetic resin is based on a Phenol formaldehyde resin with the commercial name Bakelite, and is formed from a elimination reaction of phenol with formaldehyde. Phenol is reactive towards formaldehyde at the ortho and para sites (sites 2, 4 and 6) allowing up to 3 units of formaldehyde to attach to the ring. This forms a hydroxymethyl phenol, which is not usually isolated in novolacs but is found in resoles (see below). The hydroxymethyl group is capable of reacting with either another free ortho or para site, or with another hydroxymethyl group. The first reaction forms a methylene bridge, and the second forms an ether bridge.\n\nPhenol formaldehyde resins, as a group, are formed by a step-growth polymerization reaction which may be either acid or base catalysed. The pathway the reaction follows varies depending on the catalyst type used.
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It is simply sum of products minus sum of reactants\n\n[H2O + N2] - [O2 + NH3]\n\nSince this is a 1 to 1 ratio reaction, the coefficients are one. (if there was a coefficient for NH3, you must multiply the enthalpy value of NH3 by that # because that is how many moles you have, and the value given is for only one mole.)
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The molecular formula is C6H5NO5P\n\nStructure (if in case you want it too) is as follows:\n\nDraw a benzene ring (phenyl group) minus 1 hydrogen (C6H5). To the Carbon without the hydrogen, attach a Hydroxyl group (-OH). \n\nOn the other Carbon positions, whether it is the ortho positions, meta positions, or para position, erase the hydrogen and attach a nitrate group (-NO2). \n\nOn the Oxygen with the double bond to Nitrogen on the Nitrate group, erase one of the bonds and attach this bond to the phosphate group (-PO3).\n\n4-nitrophenol phosphate is used in a substrate for a timed test for alkaline phosphatase turning colors for 4-nitrophenol
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generally cooling of the mass depends on mass surface , heat conductivity coefficient of material which is losses heat and temperature difference between cooling mass and media. \nif there is a liquid  then evaporation , humidity of media , temperature and pressure of media , kind of media eetc. also important\n\nmain heat losses = K . (T2-T1) . A \n\nK = coeeficient of heat conductivity ( depend material , thickness ) \nT2 - T1 = temperature difference \nA = surface area
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I'm sure that's what you're supposed to determine in the lab you're working on. Good luck.\n\nI've been able to find a value for the heat capacity of n-hexadecanol (cetyl alcohol) in my copy of _Lange's Handbook of Chemistry, 13th Edition_.  When you've come up with your value from the experiment, post it here and I'll check to see if you're close.
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N-(4-hydroxyphenyl)acetamide\n\nC8H9NO2
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The simple answer is that it has zero temperature coefficient.
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pH (pch) n.\n A measure of the acidity or alkalinity of a solution \n\ntrans·par·en·cy  (trns-pârn-s, -pr-)\nn. pl. trans·par·en·cies \n1. A transparent object, especially a photographic slide that is viewed by light shining through it from behind or by projection. \n\n\nOptical density is the absorbance of an optical element for a given wavelength λ per unit distance:
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Protein binding – if highly protein bound eg pheny – displaced, incr free drug\n\nHope this is what you're looking for.\n\n\nPhenyl &#92;Phe"nyl&#92;, n. [Gr. ? to bring to light + -yl: cf. F. ph['e]nyle. So called because it is a by-product of illuminating gas.]\n\n(Chem.) A hydrocarbon radical (C6H5) regarded as the essential residue of benzene, and the basis of an immense number of aromatic derivatives.\n\nPhenyl hydrate (Chem.), phenol or carbolic acid.\n\nPhenyl hydrazine (Chem.), a nitrogenous base (C6H5.N2H3) produced artificially as a colorless oil which unites with acids, ketones, etc., to form well-crystallized compounds.
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Phenol is an anesthetic.  It numbs nerve endings temporarily.  It's mostly used to deaden gums before injection of longer-acting anesthetics like Novocaine and Lidocaine.
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The Equation should be:\nNaCl + H2SO4 = Na2SO4 + HCl\nSo the coefficients are (2,1,1,2)
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The drag coefficient is a number that aerodynamicists use to model all of the complex dependencies of shape, inclination, and flow conditions on aircraft drag. This equation is simply a rearrangement of the drag equation where we solve for the drag coefficient in terms of the other variables. The drag coefficient Cd is equal to the drag D divided by the quantity: density r times half the velocity V squared times the reference area A. \n\nCd = D / (A * .5 * r * V^2) \n\nThe quantity one half the density times the velocity squared is called the dynamic pressure q. So \n\nCd = D / (q * A) \n\nThe drag coefficient then expresses the ratio of the drag force to the force produced by the dynamic pressure times the area. \n\nThis equation gives us a way to determine a value for the drag coefficient. In a controlled environment (wind tunnel) we can set the velocity, density, and area and measure the drag produced. Through division we arrive at a value for the drag coefficient. As pointed out on the drag equation slide, the choice of reference area (wing area, frontal area, surface area, ...) will affect the actual numerical value of the drag coefficient that is calculated. When reporting drag coefficient values, it is important to specify the reference area that is used to determine the coefficient. We can predict the drag that will be produced under a different set of velocity, density (altitude), and area conditions using the drag equation.\n\nThe drag coefficient contains not only the complex dependencies of object shape and inclination, but also the effects of air viscosity and compressibility. To correctly use the drag coefficient, we must be sure that the viscosity and compressibility effects are the same between our measured case and the predicted case. Otherwise, the prediction will be inaccurate. For very low speeds (< 200 mph) the compressibility effects are negligible. At higher speeds, it becomes important to match Mach numbers between the two cases. Mach number is the ratio of the velocity to the speed of sound. At supersonic speeds, shock waves will be present in the flow field and we must be sure to account for the wave drag in the drag coefficient. So it is completely incorrect to measure a drag coefficient at some low speed (say 200 mph) and apply that drag coefficient at twice the speed of sound (approximately 1,400 mph, Mach = 2.0). It is even more important to match air viscosity effects. The important matching parameter for viscosity is the Reynolds number that expresses the ratio of inertial forces to viscous forces. In our discussions on the sources of drag, recall that skin friction drag depends directly on the viscous interaction of the object and the flow. If the Reynolds number of the experiment and flight are close, then we properly model the effects of the viscous forces relative to the inertial forces. If they are very different, we do not correctly model the physics of the real problem and will predict an incorrect drag.\n\nThe drag coefficient equation will apply to any object if we properly match flow conditions. If we are considering an aircraft, we can think of the drag coefficient as being composed of two main components; a basic drag coefficient which includes the effects of skin friction and shape (form), and an additional drag coefficient related to the lift of the aircraft. This additional source of drag is called the induced drag and it is produced at the wing tips due to aircraft lift. Because of pressure differences above and below the wing, the air on the bottom of the wing is drawn onto the top near the wing tips. This creates a swirling flow which changes the effective angle of attack along the wing and "induces" a drag on the wing. The induced drag coefficient Cdi is equal to the square of the lift coefficient Cl divided by the quantity: pi (3.14159) times the aspect ratio AR times an efficiency factor e. \n\nCdi = (Cl^2) / (pi * AR * e) \n\nThe aspect ratio is the square of t