What is kow value?
What is kow value?
The octanol/water partition coefficient (Kow) is defined as the ratio of a chemical’s concentration in the octanol phase to its concentration in the aqueous phase of a two-phase octanol/water system. Kow = Concentration in octanol phase / Concentration in aqueous phase. Values of Kow are thus, unitless.
What is miLogP?
miLogP is a model used by the ZINC database. May I use your service in my medicinal chemistry / cheminformatics / QSAR class? Yes, feel free to do so. Both our property prediction service and molecular database search service are used already in such classes at several leading universities.
What is a high partition coefficient?
unit of measure called the partition coefficient. The greater the solubility of a substance, the higher its partition coefficient, and the higher the partition coefficient, the higher the permeability of the membrane to that particular substance.
What is a high Koc?
Kd or Koc measures the mobility of a substance in soil. A very high value means it is strongly adsorbed onto soil and organic matter and does not move throughout the soil. A very low value means it is highly mobile in soil.
What is log Koc?
Thus a normalised organic carbon to water partition coefficient (KOC), described as the ratio between the sorption coefficient Kd, and the organic carbon content of the sorbent, in units of mass of organic carbon (OC) per mass of soil (g OC/g soil) is commonly used to assess the extent to which an organic chemical is …
What is meant by chemisorption?
Chemisorption is a kind of adsorption which involves a chemical reaction between the surface and the adsorbate. New chemical bonds are generated at the adsorbant surface. The strong interaction between the adsorbate and the substrate surface creates new types of electronic bonds.
What is Langmuir constant?
The Langmuir constant (K) indicates the extent of interaction between adsorbate and the surface. If the value of K is relatively larger it indicates that there is a strong interaction between adsorbate and adsorbent while smaller value implies a weak interaction.
What is called isotherm?
Isotherm, line drawn on a map or chart joining points with the same temperature. Isotherms are commonly used in meteorology to show the distribution of temperature at the Earth’s surface or on a chart indicating constant level or constant pressure.
What does isotherm look like?
Isotherms are lines of constant or equal temperature. For example, in the map below, temperatures in the 60’s may be represented by a yellow color, while temperatures in the 70’s may be represented by an orange color. The line that divides the yellow from the orange is the isotherm.
Which has more slope adiabatic or isothermal?
We can see from the graph, that the slope of adiabatic is higher than that of the isothermal process.
What is the slope of isothermal process?
Isothermal curve slope =γ× adiabatic curve slope.
What is the slope of a PV graph?
The slope tells you how fast the pressure is changing with respect to volume. Slope m, is equal to Pressure/Volume, or dimensionally: m=(F/A)/V in SI units, it will be kg/(m^5) or kg*(m^-4)s^(-2). This tells you how fast the pressure is changing with volume for every kg of gas/atoms in the system per volume.
Does isothermal mean adiabatic?
In thermodynamics, an isothermal process is a type of thermodynamic process in which the temperature of the system remains constant: ΔT = 0. In contrast, an adiabatic process is where a system exchanges no heat with its surroundings (Q = 0).
How do you create an isothermal process?
Ideally, how to achieve isothermal expansion of an ideal gas?
- Put the ideal gas in a cylinder with a piston and some amount of weight on it to reach some pressure.
- Find a heat reservoir equal to the temperature of the gas.
- Slowly lift weight off of the piston according to P∝1/V.