9 results about "Surface concentration" patented technology

A method for estimating surface concentrations of gas in a drilling fluid in use in a drilling rig includes measuring gas-out or gas-in concentrations while drilling a wellbore and processing the gas-out measurements or the gas-in measurements with a calibrated model to estimate corresponding gas-in concentrations or gas-out concentrations.

This application relates to a method for determining the bending deformation of flat glass. The method determines the radius of curvature of the flat glass corresponding to its bending deformation based on the Stony relation and / or a relation based on the elastic-plastic deformation rate that reflects the setting of the width change. The Stony relation includes a first layer and a second layer, defined as follows: based on the integral value of the concentration distribution of the ion-exchange depth layer after ion exchange of alkali-containing glass and the depth calculated with the same area under the assumption of the same surface concentration along the depth direction (i.e., the effective diffusion length), the thickness of the flat glass corresponding to the effective diffusion length is considered as the first layer, and the thickness of the flat glass excluding the effective diffusion length is considered as the second layer. The plastic deformation rate included in the elastic-plastic deformation rate relation is based on the shape change caused by the structural mitigation effect due to α-relaxation, based on the width change that occurs after ion exchange in the flat glass. The average of the width change gradually changing with concentration in the ion-exchange depth layer is considered as a single value. Using a purely geometric method, it is assumed that the width change occurs from half the depth of the ion-exchange depth layer to half the depth of the non-ion-exchange layer, and this is defined as plastic curvature occurring with the width change.

A collagen treatment structure (10), system and method. The collagen treatment structure (10) comprises a treatment cavity (11) and a centrifugal treatment mechanism (12). The treatment cavity (11) is provided with a discharge port (111). The centrifugal treatment mechanism (12) comprises centrifugal ultrafiltration members (122) and a centrifugal driving member (121) connected thereto, wherein the centrifugal ultrafiltration members (122) are driven by the centrifugal driving member (121) to rotate; the centrifugal ultrafiltration members (122) are arranged in the treatment cavity (11); each centrifugal ultrafiltration member (122) is provided with ultrafiltration membrane layers (1221) on two opposite surfaces; a filtering cavity (1222) is provided inside each centrifugal ultrafiltration member (122); and each centrifugal ultrafiltration member (122) is further provided with a waste liquid hole (1223) in communication with the filtering cavity (1222), and the waste liquid holes (1223) are in communication with the discharge port (111). By combining the principles of centrifugation and cross-flow filtration, and under the action of a centrifugal force, membrane-surface filter layers are efficiently removed, the membrane-surface concentration difference is eliminated, and a membrane blockage phenomenon does not easily occur, such that the purity of collagen is improved, and the collagen concentration can reach 20 mg / ml.

The present application belongs to the technical field of environmental pollutant detection, and particularly relates to a method for detecting fluoranthene in water. The method provided by the present application extracts and enriches the to-be-detected fluoranthene on an organic microporous membrane as a solid-phase extraction medium in the sample pretreatment process, and can directly detect the fluoranthene on the organic microporous membrane after solid-phase extraction of the water sample without elution. Since the to-be-detected fluoranthene is separated from the water and adsorbed on the surface of the membrane material, the concentration is greatly improved, and the light signal can directly irradiate the to-be-detected fluoranthene on the enriched organic microporous membrane for excitation without refraction and reflection of water, so that the sensitivity is higher than that of the traditional solid-phase extraction method, time and reagents are saved, the detection cost is reduced, and the detection efficiency is improved.

There is a very good linear relationship between the absorptivity (A) of a fabric sample to UV-Vis light and the surface concentration C of an antimicrobial agent on the fabric sample. On this basis, provided in the present invention is a method for estimating antimicrobial efficacy of a fabric sample, the method comprising: preparing antimicrobial agents of different concentrations (C), and respectively applying the antimicrobial agents to different fabric sheets to obtain fabric samples; measuring the absorptivity (A) of the fabric samples to radiation of a certain wavelength; measuring antimicrobial rates (y) of the fabric samples, to which the antimicrobial agents of different concentrations (C) are applied, against a certain microorganism; and fitting the antimicrobial rates (y) of the fabric samples and the absorptivity (A) of the fabric samples to radiation of a certain wavelength, so as to obtain a relationship between the antimicrobial rates (y) and the absorptivity (A) of the fabric samples to radiation of the wavelength, wherein the antimicrobial rate (y) of the fabric sample to be tested can be calculated by using the relationship between the antimicrobial rates (y) and the absorptivity (A) of the fabric samples to radiation of the wavelength and on the basis of the absorptivity (A1) of the fabric sample to be tested to radiation of the wavelength.

This invention relates to the field of polymer surface treatment and functional modification technology, specifically to a resin anti-aging treatment method based on ultraviolet absorption gradient distribution. It includes the following steps: S1: preparing a gradient coating solution; S2: high-concentration initial coating, gradient transition treatment, low-concentration touch-up coating, and complete curing. A continuous gradient distribution is achieved: through a specific sequence of "high-concentration initial coating → transition treatment → low-concentration touch-up coating," combined with low-temperature pre-curing control at 40-60℃, a continuous concentration gradient of the ultraviolet-absorbing functional components from the surface to the interior is successfully constructed. The surface concentration is high, and the interior concentration is low, with mutual solubility between layers and no clear interface. Strong surface ultraviolet resistance: the concentration of ultraviolet absorber in the 0-50μm region of the surface is 3-10 times that of the interior region, efficiently absorbing ultraviolet light entering the surface and protecting the deeper resin from damage. High internal transparency: the internal ultraviolet absorber content is low, and the resin transmittance is ≥90%, avoiding the scattering and absorption of visible light by additives in uniformly distributed solutions.

To provide a steel component having a carburized hardened layer with a sufficiently reduced surface friction coefficient.SOLUTION: A steel component comprises a core with a chemical composition, by mass%, containing C: 0.10-0.30%, Si: 0.15-1.00%, Mn: 0.30-1.00%, P: 0.030% or less, S: 0.025% or less, Cr: 0.90-2.00%, Al: 0.005-0.100%, N: 0.0250% or less, O: 0.0050% or less, Cu: 0.10-0.50%, and Ni: 0.05-2.00%, with the remainder comprising Fe and impurities. In a depth direction elemental concentration profile obtained by glow discharge optical emission spectrometry from the surface of a carburized hardened layer toward the carburized hardened layer depth direction, the surface CuNi concentration Ts, defined as the sum of Cu and Ni concentrations from the surface of the carburized hardened layer to a depth of 10 nm, and the core CuNi concentration Tc, defined as the sum of Cu and Ni concentrations in the core, satisfy the following expression: Ts / Tc≥0.60 (1).SELECTED DRAWING: None

The present invention provides a galvanized steel sheet including a base steel sheet and a galvanized layer arranged on the surface of the base steel sheet, wherein the base steel sheet has a chemical composition including, based on mass %, Ni: 0.010 to 1.000%, Cu: 0.010 to 1.000%, and Sn: 0.003 to 1.000%, and in an elemental distribution image obtained by measuring a cross-section of the galvanized steel sheet with EPMA, the surface coverage of the area covered with a surface concentration of at least one of Ni, Cu, and Sn satisfying [Ni]+[Cu]+0.6[Sn]≥10 and with a surface concentration of Fe of 10 mass % or more is 25% or more, and the average length of the uncovered area not covered by at least one of Ni, Cu, and Sn is 10 µm or less, and the portion covering the galvanized steel sheet.