33 results about "Kinetic rate" patented technology

An aspect provides a method of determining a concentration of free chlorine in an aqueous sample, including adding a reagent to the sample, the reagent being reactive with the free chlorine at a first kinetic rate and reactive with at least one chloramine at a second kinetic rate, the first kinetic rate being different from the second kinetic rate; measuring an absorbance response over time resulting from reaction of the free chlorine and the at least one chloramine with the reagent over time; and determining the concentration of the free chlorine in the sample based on a determined rate of change of the absorbance response over time. Other aspects are described and claimed.

Disclosed herein are polypeptides which exhibit asparaginase activity and little to no glutaminase activity. The polypeptides have sequences which correspond to W. succinogenes asparaginase, but have an amino acid residue other than proline at amino acid position 121. The polypeptides exhibit higher kinetic rates of asparaginase activity to glutaminase activity as compared to W. succinogenes asparaginase and Elspar®, an E. coli asparaginase.

The invention discloses a non-noble metal oxygen evolution catalyst CuNiS2 with high activity, high stability and controllable shape, and discloses a preparation method and application thereof. The catalyst is prepared by a method for high-temperature thermal injection, the operation is simple, and the aim of controllable synthesis of the shapes of nano particles is fulfilled. According to the preparation method, on the basis of a synthesized CuS nano hexagon, a nickel source is added into the system, so that a nano sheet CuNiS2 with an irregular edge structure is synthesized; therefore, the relative specific surface area of the catalyst system is enlarged; due to the special irregular edge structure, the oxygen evolution material has a large quantity of active sites, and metal nickel is extremely high in conductivity, so that the conductivity of the whole system is improved, the kinetic rate of electronic transmission is increased, and the activity of the material is enhanced.

The invention disclose a method for analyzing dynamic transferred water quality based on a fugacity theory, relating to a water quality analysis method, and solving the problem of larger deviation between a simulated result and an actual condition caused by actually unobtainable required parameters and randomly non-modifiable inner parameters in a traditional water quality analysis method. The method comprises the following steps of: firstly, confirming environment facies of a water area to be detected and acquiring geographic information parameters of the water area to be detected, environmental parameters of various environment and materialization parameters of a target pollutant; then computing fugacity capacity of each environmental facies, speed constant of reaction dynamics and transfer parameters among each environmental face; then establishing a system of differential equation by taking the fugacity of each environmental face as an unknown and solving the system of differential equation through a Runge-Kutta algorithm to obtain the fugacity of each environmental face; and calculating out pollutant concentration by the fugacity of each environmental facies and the fugacity capacity. The invention overcomes defects of the prior art, and can be applied to the field of analyzing transferring transformation of organic pollutants in the water area and distribution law of multi-medium environment.