7 results about "Neutral Charge" patented technology

In the present invention, visible light is appropriately refracted and transmitted. A ceramic material (10) contains, as a primary component, a compound having a perovskite structure represented by the chemical formula A(B1v,B21-v)Ow, wherein A is one or more elements selected from among Ba, Sr, Ca, K, Na, La, Gd and Yb, B1 is one or more elements selected from among Ti and Hf, and B2 is one or more elements selected from among Ta, Nb, Zr, Ge, Gd, Yb, Ga, Ca and Al. The perovskite structure does not contain Mg, Zn, Y or In. v is a positive number that is less than 1. w is a numerical value that enables the overall chemical formula to have a neutral charge.

The invention discloses a method for adjusting a diamond solid quantum spin charge state by using ultraviolet light and application thereof, and aims to solve the problem of adjusting two charge states of an NV color center. The method for adjusting the solid quantum spin charge state of the diamond by utilizing ultraviolet light comprises the following steps of: 1, preparing the diamond with a nitrogen vacancy color center; 2, irradiating the diamond with the color center by using laser as an excitation light source; and 3, under the condition of laser irradiation, simultaneously applying an ultraviolet light source for irradiation to increase the content of NV0 in a neutral charge state, thereby completing the method for adjusting the spin charge state of the solid quantum of the diamond by utilizing the ultraviolet light. The NV color center charge state is regulated and controlled in an ultraviolet irradiation mode, compared with a terminal method and a Schottky contact method, the method has the advantages of being non-contact and non-destructive, and the crystal quality can be better guaranteed. The method for adjusting the spin charge state of the solid quantum of the diamond can promote the application of the NV color center in quantum precision measurement and an extensible quantum system.

The present invention relates to a method for purifying one or more target nucleic acid(s), comprising the steps of providing a solution containing the target nucleic acid(s), providing an anion exchange solid phase, characterized in that a switch between an overall positive charge of said anion exchange solid phase to a neutral charge or a negative charge occurs in a pH range of between pH 3 and pH 9, contacting the solution containing the target nucleic acid(s) to said anion exchange solid phase under conditions that allow binding of said target nucleic acid(s) to said solid phase, and eluting the nucleic acid(s) from the anion exchange solid phase using an elution buffer having a pH that is close to or higher than the pH at which the switch between an overall positive charge of said anion exchange solid phase to a neutral charge or a negative charge occurs.

The present invention relates to a method for purifying one or more target nucleic acid(s), comprising the steps of providing a solution containing the target nucleic acid(s), providing an anion exchange solid phase, characterized in that a switch between an overall positive charge of said anion exchange solid phase to a neutral charge or a negative charge occurs in a pH range of between pH 3 and pH 9, contacting the solution containing the target nucleic acid(s) to said anion exchange solid phase under conditions that allow binding of said target nucleic acid(s) to said solid phase, and eluting the nucleic acid(s) from the anion exchange solid phase using an elution buffer having a pH that is close to or higher than the pH at which the switch between an overall positive charge of said anion exchange solid phase to a neutral charge or a negative charge occurs.

Provided is a slurry composition for chemical mechanical polishing (CMP) including two types of colloidal silica abrasive particles, a pH buffer, and a pH adjuster, in which the two types of colloidal silica abrasive particles include first colloidal silica abrasive particles having a neutral charge and second colloidal silica abrasive particles having a negative charge.

The application belongs to the technical field of membrane separation, and particularly relates to a composite membrane and a preparation method and device thereof, which comprises the following steps: S1, a macroporous neutral charge base membrane is selected, a supporting substrate is used to support the base membrane, and the base membrane is assembled into a polytetrafluoroethylene diffusion cell to divide the diffusion cell into two independent chambers; S2, a ligand solution is prepared and injected, and a metal organic framework precursor solution is prepared according to a 1:1 molar ratio; metal organic framework materials with sub-nanometer channels are synthesized in-situ in membrane holes through diffusion effects of two specific ligands in the membrane holes, and the membrane holes of the base membrane are filled with the materials to prepare a high-performance composite membrane, the synthesis process of the membrane material avoids inevitable surface charges and defects of the metal organic framework materials in a traditional membrane preparation method, the mechanical strength of the composite membrane is improved by introducing a polymer base, and the sub-nanometer channels of the neutral charge metal organic framework materials are used for lithium-magnesium separation.

A CVD single crystal diamond having a smallest linear dimension of no less than 3.5 mm, a concentration of single substitutional nitrogen atoms in their neutral charge state (Ns0), as measured by EPR, of between 20 and 250 ppb, a hue angle, hab, between 75 and 135°.