Abstract: A transient electromagnetic device with variable shape and turns includes squares, a transmitting coil carrying frame, a transmitting coil, a turns-variable device, a current generator and a working power supply. The transmitting coil carrying frame is arranged inside the transmitting coil; the transmitting coil carrying frame is configured as a carrier of the transmitting coil, and configured for adjusting a side length of the transmitting coil and a shape of the transmitting coil; the square is configured for clamping and connecting the transmitting coil and the transmitting coil carrying frame to fix the transmitting coil to the transmitting coil carrying frame. The current generator is configured for generating transient current; the turns-variable device is configured for changing the turns of the transmitting coil; and the transmitting coil is configured for transmitting the transient current to a target area to be measured.

Abstract: Electrode materials comprising an electrochemically active material, wherein said electrochemically active material comprises a layered potassium metal oxide. The layered potassium metal oxide may be of formula KxMO2. The invention also relates to electrodes, electrochemical cells and batteries comprising said electrode material. For example, said battery may be a lithium or lithium-ion battery, a sodium or sodium-ion battery, or a potassium or potassium-ion battery.

Abstract: A gene combination capable of high-efficiency expression of rhNGF is provided to optimize gene expression regulation components of a recombinant human nerve growth factor. The gene combination enhances expression of rhNGF. As shown by experiments, the gene combination is capable of high-efficiency expression of a recombinant human nerve growth factor (rhNGF) with natural activity in a eukaryotic expression system.

Abstract: The present technology relates to electrode materials comprising an electrochemically active material, wherein the electrochemically active material comprises a P2-type or a O3-type layered sodium metal oxide. The electrochemically active material is of formula NaxMO2, wherein 0.5?x?1.0 and M is selected from Co, Mn, Fe, Ni, Ti, Cr, V, Cu, Sb and their combinations. Also described are electrodes, electrochemical cells and batteries comprising the electrode materials.

Abstract: A method for removing precursors in recombinant human nerve growth factor (rhNGF) by hydrophobic interaction chromatography (HIC) is provided, where a Chinese hamster ovary (CHO) cell culture is processed by column chromatography for preliminary purification, and the pretreated sample obtained therefrom is further processed in a HIC column by washing the sample and then eluting the HIC column.

Abstract: A method for preparing purified recombinant human nerve growth factor (rhNGF) is provided. In the method, hydrophobic interaction chromatography (HIC) and cation-exchange chromatography (CEC) operations are sequentially performed on a Chinese hamster ovary (CHO) cell culture. The method allows for removal of rhNGF precursors, N-terminal truncated variants, and other variants of rhNGF from the CHO cell culture to thereby obtain a purified rhNGF product.

Abstract: A gene combination for expressing recombinant human nerve growth factor (rhNGF) includes an rhNGF precursor gene and an intron. The intron can have a nucleotide sequence shown in SEQ ID NO: 1 or SEQ ID NO: 2. A eukaryotic expression vector for rHNGF expression including the gene combination, a CHO cell including the eukaryotic expression vector, and methods for preparing rhNGF using the gene combination, the expression vector, and the CHO cell are also disclosed.

Abstract: A method for removing an N-terminal truncated variant and an abnormal variant in recombinant human nerve growth factor (rhNGF) is provided. An rhNGF raw material loaded on a cation-exchange material is washed with a washing liquid to obtain a washed raw material from which an N-terminal truncated variant and an abnormal variant have been removed, where the washing liquid has higher electrical conductivity than the rhNGF raw material. Cation-exchange chromatography (CEC) elution is then performed on the washed raw material with an elution buffer having higher electrical conductivity than the washing liquid. A purified rhNGF product is obtained from the eluate.

Abstract: A method for removing precursors in recombinant human nerve growth factor (rhNGF) by hydrophobic interaction chromatography (HIC) is provided, where a Chinese hamster ovary (CHO) cell culture is processed by column chromatography for preliminary purification, and the pretreated sample obtained therefrom is further processed in a HIC column by washing the sample and then eluting the HIC column.

Abstract: A gene combination capable of high-efficiency expression of rhNGF is provided to optimize gene expression regulation components of a recombinant human nerve growth factor. The gene combination enhances expression of rhNGF. As shown by experiments, the gene combination is capable of high-efficiency expression of a recombinant human nerve growth factor (rhNGF) with natural activity in a eukaryotic expression system.

Abstract: The present invention discloses a layered copper-containing oxide material and a preparation process and purpose thereof The material has a general chemical formula of Na0.68+aNibCucMdMneO2+?, where Ni, Cu, M, and Mn respectively form octahedral structures together with six oxygen atoms that are most adjacent therein, the octahedral structures have arrangements with common edges and constitute transition metal layers; alkali metal ions Na+ are located between every two of the transition metal layers; M is specifically one or more of Mg2+, Mn2+, Zn2+, Co2+, Al3+, B3+, Cr3+, Mn3+, Co3+, V3+, Zr4+, Ti4+, SiO4+, Mo4+, Ru4+, Nb4+, Sb5+, Nb5+, Mo6+, and Te6+; and a, b, c, d, e, ?, and m meet (0.68+a)+2(b+c)+md+4e=2(2+?), and b+c+d+e=1.