4 results about "Artificial urine" patented technology

The absorbent article is characterized in that the surface sheet (20) has a skin-side part (21) and a non-skin-side part (22), the average fineness of fibers constituting the non-skin-side part (22) is smaller than the average fineness of fibers constituting the skin-side part (21), the absorbent core (121) has a compressed part (123) compressed from the skin side in the thickness direction, and when a drainage test is performed, the drainage index is 50% or less. In a liquid discharge test, 40 ml of artificial urine is dropped four times at a predetermined position on the surface sheet (20), and then a liquid discharge index related to the absorption rate and the absorption amount of the artificial urine is obtained on the basis of the measurement results of the predetermined position by a moisture meter.

The invention relates to the technical field of biological experiments, and discloses a bacterial biofilm quantitative experiment device which comprises a shell, the inner bottom of the shell is fixedly connected with the output end of a peristaltic pump and fixedly connected with one end of an infusion tube, and the other end of the infusion tube is fixedly connected with an incubation box through a fixedly-connected straight-through connector; the input end of the peristaltic pump is fixedly connected with one end of a hose, a first urine storage device is arranged on the end face of the top of the shell, the end face of the bottom of the first urine storage device is fixedly connected with an electromagnetic valve through a pipeline, and the output portion of the electromagnetic valve is connected with one end of a liquid inlet pipe in a sleeved mode. And then the electromagnetic valve is controlled to quantitatively inject the artificial urine from the first urine storage device to the second urine storage device, so that the quantitative injection function is realized. The hose is connected with the first loop bar and the second loop bar in a sleeved mode, the longitudinal and transverse positions of the hose can be controlled through the longitudinal suction assembly, then artificial urine at the bottom of the second urine storage device can be completely sucked, and the utilization rate of the artificial urine is increased.

The invention provides a method for rapidly and sensitively detecting GSTP1 (Glutathione S Transferase Protein 1) hypermethylated promoter DNA (Deoxyribose Nucleic Acid) of prostatic cancer in urine. Based on the liquid gate graphene transistor sensor, a bridge-shaped tetrahedral DNA probe is modified to the surface of a gold gate through a gold-sulfur bond, and a hypermethylated GSTP1 promoter converted by hydrosulphite can be selectively captured. Wherein DNA is treated by hydrosulfite, so that unmethylated cytosine (C) can be converted into uracil (U), and methylated cytosine (5-mC) is kept unchanged. According to the bridge-shaped tetrahedron DNA, due to the influence of electrostatic repulsion and space structure between two tetrahedrons, the transverse distance between curled ssDNA is easily controlled to improve the hybridization efficiency and reduce Debye shielding, the detection limit can be as low as 10-18 M, the wide linear detection range of 10 <-18 >-10 <-8 > M can be achieved, and the detection efficiency is greatly improved. The kit has a good detection effect in complex artificial urine and clinical practical sample detection, can effectively distinguish clinical urine samples of prostatic cancer patients and control groups, and has clinical application value.

The application discloses an artificial urine buffer matrix and a preparation method and application thereof. The artificial urine buffer matrix comprises urea, uric acid, alpha-hydroxy acid, amino acid, ions and sugar. The artificial urine buffer matrix can eliminate background interference, guarantee the immune reaction detection of small molecules, proteins and other biomarkers in urine, and has small matrix effect.