Abstract: The present application relates to a hydrogel. The hydrogel includes polyvinyl alcohol, sodium carboxymethyl cellulose and Huangshui polysaccharide, and the mass ratio of the mass sum of the polyvinyl alcohol and the sodium carboxymethyl cellulose to the Huangshui polysaccharide is 100:(1.8-8.2). The present application further relates to use of the hydrogel as an adsorbent for a dye. The present application further relates to a method for preparing a hydrogel.

Abstract: The invention discloses a neodymium-iron-boron magnet material, a preparation method and use thereof. The neodymium-iron-boron magnet material comprises the following components of: 28-33 wt % of R, wherein R is a rare earth element, and R comprises Pr and 27-31.5 wt % of Nd; 0.30-1.3 wt % of Al; 0.35-0.6 wt % of Cu; ?0.85 wt % of Co; 0.98-1.2 wt % of B; ?0.25 wt % of Nb; 62-69 wt % of Fe, wherein wt % is a percentage of the mass of respective component in the total mass of the neodymium-iron-boron magnet material; and the contents of the Nb and the Pr in the neodymium-iron-boron magnet material satisfy the following formula: Nd/Pr?58. In the present invention, by optimizing the formula of the neodymium-iron-boron magnet material, the coercivity of the neodymium-iron-boron magnet material prepared is improved while maintaining higher levels of remanence and squareness.

Abstract: A main and auxiliary alloy-based neodymium-iron-boron magnet material and the preparation method thereof. The raw material composition for the main and auxiliary alloy-based neodymium-iron-boron magnet material includes a main alloy raw material and an auxiliary alloy raw material, wherein the mass percentage of the auxiliary alloy raw material in the raw material composition for the main and auxiliary alloy-based neodymium-iron-boron magnet material is 1.0-15.0 mass %. For the main and auxiliary alloy-based neodymium-iron-boron magnet material prepared by using the raw material composition, the coercivity is increased while high remanence is ensured, and the preparation method therefor can be suitable for engineering applications.

Abstract: Provided is an oligonucleotide primer with an acyclic nucleoside structure for initial capping, which has a molecular structural formula of m7UNGpppA2?omepG, and has higher mRNA in vitro transcription efficiency, higher capping efficiency, lower immunogenicity and higher protein translation efficiency.

Abstract: A R-T-B magnet and a preparation method thereof. The R-T-B magnet includes the following components of: ?30.0 wt % of R, said R is a rare earth element; 0.16-0.6 wt % of Cu; 0.4-0.8 wt % of Ti; ?0.2 wt % of Ga; 0.955-1.2 wt % of B; and 58-69% of Fe; wherein wt % is the mass percentage of respective component in the total mass of all components. The R-T-B magnet has higher remanence, coercivity, squareness and high-temperature stability.

Abstract: An R-T-B magnet includes the following components of: ?30.0 wt % of R, the R is a rare earth element; 0.02-0.14 wt % of Nb; 0.2-0.48 wt % of Cu; ?0.24 wt % of Ti+Nb; ?0.50 wt % of Al+Cu; ?0.955 wt % of B; and 58-69 wt % of Fe, wherein wt % is the mass percentage of respective component in the total mass of all components. The R-T-B magnet has remanence, coercivity, high-temperature stability and squareness at a better level. A method prepares the R-T-B magnet.

Abstract: The invention discloses an R-T-B magnet and a preparation method thereof. The R-T-B magnet comprises the following components of: ?30.0 wt % of R, wherein R is a rare earth element; 0.1-0.3 wt % of Nb; 0.955-1.2 wt % of B; 58-69 wt % of Fe, wherein wt % is a percentage of the mass of respective component to the total mass of all components; the R-T-B magnet further comprises Co and Ti; and in the R-T-B magnet, the ratio of the mass content of Co to the total mass content of “the Nb and the Ti” is 4-10. The present invention further optimizes the coordination relationship among the components in the R-T-B magnet, which can prepare a magnet material with relatively high levels of magnetic properties such as remanence, coercivity, squareness and the like.

Abstract: Disclosed in the present invention are a heavy rare earth alloy, neodymium-iron-boron permanent magnet material, a raw material, and a preparation method. The heavy rare earth alloy comprises the following components: RH: 30-100 mas %, not including 100 mas %; X, 0-20 mas %, not including 0; B: 0-1.1 mas %; and Fe and/or Co: 15-69 mas %, RH comprising one or more heavy rare earth elements in Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sc, and X being Ti and/or Zr. When the heavy rare earth alloy of the present invention is used as a sub-alloy to prepare the neodymium-iron-boron permanent magnet material, a high utilization rate of heavy rare earth is achieved, so that the coercivity can also be greatly improved while the neodymium-iron-boron permanent magnet material maintains high remanence.

Abstract: Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material comprises R, B, M, Fe, Co, X and inevitable impurities, wherein: (1) R is a rare earth element, and the R includes at least Nd and RH, M being one or more of Ti, Zr and Nb, and X including Cu, “Al and/or Ga”; and (2) in percentage by weight, R: 30.5-32.0 wt%, B: 0.95-0.99 wt%, M: 0.3-0.6 wt%, X: 0.8-1.8 wt%, and Cu: 0.35-0.50 wt%, and the balance is Fe, Co and inevitable impurities. According to the present invention, under the condition of 0.3-0.6 wt% of a high melting point metal, a permanent magnet material with an excellent magnet performance and a good squareness is obtained.

Abstract: Provided are a neodymium-iron-boron magnet material, raw material composition, preparation method, and application. The raw material composition of the neodymium-iron-boron magnet material comprises the following mass content components: R: 28-33%; R is a rare earth element, R comprises R1 and R2; R1 is a rare earth element added during smelting, and R1 comprises Nd and Dy; R2 is a rare earth element added during grain boundary diffusion, R2 comprises Tb, the content of R2 is 0.2%-1%; Co: <0.5%, but not 0; M: ?0.4%, but not 0, and M is one or more of Bi, Sn, Zn, Ga, In, Au, and Pb; Cu: ?0.15%, but not 0; B: 0.9-1.1%; Fe: 60-70%; the percentage is the mass percentage of the mass of each component to the total mass of the raw material composition. The neodymium-iron-boron magnet material has high remanence, coercivity, and good thermal stability.

Abstract: Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components in weight content: R: 28-33%; R being rare earth elements, and comprising R1 and R2, R1 being a rare earth element added during smelting, R1 comprising Nd and Dy, R2 being a rare earth element added during grain boundary diffusion, R2 comprising Tb, and the content of R2 being 0.2-1%; M: ?0.4% but not 0, M being one or more elements among Bi, Sn, Zn, Ga, In, Au and Pb; Cu: ?0.15% but not 0; B: 0.9-1.1%; Fe: 60-70%; but not containing Co. The neodymium-iron-boron magnet material under the condition of adding a small amount of heavy rare earth elements and not adding cobalt, can still have a relatively high coercivity and remanence, and excellent thermal stability.

Abstract: An R-T-B-based sintered magnet and a preparation method therefor. The R-T-B-based sintered magnet comprises: R, B, Ti, Ga, Al, Cu, and T. The contents thereof are as follows: R is 29.0-33%; the content of B is 0.86-0.93%; the content of Ti is 0.05-0.25%; the content of Ga is 0.3-0.5%, but not 0.5%; the content of Al is 0.6-1%, but not 0.6%; the content of Cu is 0.36-0.55%. The percentage is the mass percentage. Under the condition that no heavy rare earth is added or a small amount of heavy rare earth is added, by using a low B technology, not only the remanence performance of the R-T-B-based sintered magnet is improved, but also the coercivity and the squareness of the magnet are ensured.

Abstract: A neodymium-iron-boron permanent magnet material, a preparation method, and an application. The neodymium permanent magnet material includes R, Al, Cu, and Co; R comprises RL and RH; RL comprises one or many light rare earth elements among Nd, La, Ce, Pr, Pm, Sm, and Eu; RH comprises one or many heavy rare earth elements among Tb, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Sc; the neodymium-iron-boron permanent magnet material satisfies the following relations: (1) B/R: 0.033-0.037; (2) AI/RH: 0.12-2.7. The neodymium-iron-boron permanent magnet material has uniquely advantageous magnetic and mechanical properties, with Br?13.12 kGs, Hcj?17.83 kOe, and bending strength?409 MPa.

Abstract: A neodymium-iron-boron magnetic material, a preparation method therefor and an application thereof. The neodymium-iron-boron magnetic material comprises the following components in percentage by mass: 29.5-31.5 wt. % of R, where RH>1.5 wt. %; 0.05-0.25 wt. % of Cu; 0.42-2.6 wt. % of Co; 0.20-0.3 wt. % of Ga; 0.25-0.3 wt. % of N; 0.46-0.6 wt. % of Al, or alternatively Al is less than or equal to 0.04 wt. % but is not 0; 0.98-1 wt. % of B; and 64-68 wt. % of Fe; wherein R is a rare-earth element and comprises Nd and RH, RH is a heavy rare-earth element and comprises Tb, and a mass ratio of Tb to Co is less than or equal to 15 but is not 0. The neodymium-iron-boron magnetic material has higher Hcj and Br, and lower absolute values of temperature coefficients of Br and Hcj.

Abstract: An R-T-B series permanent magnet material, a raw material composition, a preparation method, and an application. The R-T-B series permanent magnet material comprises the following components: R: 29-31.0 wt. %, RH is greater than 1 wt. %, B: 0.905-0.945 wt. %, C: 0.04-0.15 wt. %, N: 0.1-0.4 wt. %, and Fe: 67-69 wt. %, wherein R comprises RL and RH, RL is a light rare earth element, RL comprises Nd, RH is a heavy rare earth element, a (RL1-yRHy)2T17Cx phase is present at the grain boundary of the R-T-B series permanent magnet material, x: 2-3, y: 0.15-0.35, and T must comprise Fe, and also comprises one or more among Co, Ti and N. The permanent magnet material retains relative high Br and Hcj under different heat treatment temperatures.

Abstract: Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components by mass percentage: 29.5-32.8% of R?, wherein R? includes Pr and Nd, and Pr?17.15%; Al?0.5%; 0.90-1.2% of B; and 60-68% of Fe. The percentages are the mass percentages relative to the total mass of the raw material composition of the neodymium-iron-boron magnet material. Without adding a heavy rare earth element to the neodymium-iron-boron magnet material, the performance of the neodymium-iron-boron magnet material can still be significantly improved.

Abstract: An RIB-based permanent magnet material, a preparation method thereof, and an application thereof. The RIB-based permanent magnet material comprises the following components: R?: 29.5 to 33.5 wt. %, wherein R? comprises Pr, and the content of Pr is ?8.85 wt. %; C:0.106 to 0.26 wt. %; O: ?0.07 wt. %; X: 0 to 5.0 wt. %, wherein X is one or more of Cu, Al, Ga, Co, Zr, Ti, Nb and Mn; B:0.90 to 1.2 wt. %; and Fe:61.4 to 69.5 wt. %. The RIB-based permanent magnet material can improve the performance of a permanent magnet material without employing heavy rare earths. There is no need to control the content of carbon introduced in the process, and the magnet exhibits excellent performance even with a high carbon content.

Abstract: A high-Cu and high-Al neodymium iron boron magnet and a preparation method therefor. The high-Cu and high-Al neodymium iron boron magnet comprises: 29.5-33.5% R, over 0.985% B, over 0.50% Al, over 0.35% Cu, over 1% RH, and 0.1-0.4% high-melting-point elements N and Fe, wherein the percentages are the mass percentages of the elements in the total amount of elements, and the mass percentages of the element contents must satisfy the following relationships: (1) 1<RH<0.11R<3.54B; and (2) 0.12RH<Al. By means of combining Al, RH and high-melting-point metal elements that are added at a certain ratio, the problem in which the strength of a high-Cu magnet is insufficient is effectively solved, while the magnetic performance is the magnet material is ensured.

Abstract: Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components by mass percentage: 29.5-32% of R?, wherein R? is a rare earth element and includes Pr and Nd; and Pr?17.15%; 0.25-1.05% of Ga; 0.9-1.2% of B; and 64-69% of Fe. Without adding a heavy rare earth element to the neodymium-iron-boron magnet material, the remanence and coercive force of the resulting neodymium-iron-boron magnet material are both relatively high.

Abstract: An R-T-B series permanent magnet material, a raw material composition, a preparation method, and an application. An R-T-B series permanent magnet material I comprises R, T and X, which satisfy the following relational formula: (1) the atomic ratio of (Fe+Co)/B is 12.5-13.5; (2) the atomic ratio of B/X is 2.7-4.1; and X is one or more among Al, Ga and Cu. The permanent magnet material I comprises R2T14B primary phase crystalline particles, and a secondary grain boundary phase and a rare earth rich phase between two adjacent R2T14B primary phase crystalline particles. The secondary grain boundary phase and rare earth rich phase comprise phases composed of R6T13X. R6T13X phases are formed in the R-T-B series permanent magnet material I, so that Hcj and mechanical performance can be synchronously improved.