Abstract: Copper-tin-nickel brazing material prepared by alloys recycled from E-waste, preparation method therefor, and system thereof are provided. A preparation method for the copper-tin-nickel brazing material includes the following steps: (a) spreading nano-SiO2 on the bottom of crucible and then adding a crude copper-tin-iron-nickel alloy recycled from E-waste; (b) heating the crucible to melt the crude alloy into a metal liquid so that Zn and Pb in the metal liquid react with the SiO2 to form a slag that floats out; (c) introducing a refining gas to the bottom of metal liquid in step (b), thereby removing the scums or gases formed by Pb, Fe, S, and O in the metal liquid; (d) performing heat-preserving directional solidification on the metal liquid, to bias-aggregate the Fe and Sb at one end and remove the same to obtain a copper-based intermediate alloy; and smelting and powdering the copper-based intermediate alloy.

Abstract: The disclosure relates to mineral processing, and more particularly to a copper(II)-ammonia complex ion sulfidization activator, and its preparation and application. A molar ratio of NH3 to Cu2+ in the active ingredient of the copper(II)-ammonia complex ion sulfidization activator is 2:1-4:1. The preparation method includes: dropwise adding an ammonia solution to a copper salt solution; and adjusting the mixture to pH 6-7.2 with dilute sulfuric acid to obtain the copper(II)-ammonia complex ion sulfidization activator. During the sulfidization flotation for the copper oxide ore, the copper(II)-ammonia complex ion sulfidization activator is added and mixed uniformly with the ore slurry prior to the introduction of the sulfidizing agent.

Abstract: The disclosure relates to mineral processing, and more particularly to a copper(II)-ammonia complex ion sulfidization activator, and its preparation and application. A molar ratio of NH3 to Cu2+ in the active ingredient of the copper(II)-ammonia complex ion sulfidization activator is 2:1-4:1. The preparation method includes: dropwise adding an ammonia solution to a copper salt solution; and adjusting the mixture to pH 6-7.2 with dilute sulfuric acid to obtain the copper(II)-ammonia complex ion sulfidization activator. During the sulfidization flotation for the copper oxide ore, the copper(II)-ammonia complex ion sulfidization activator is added and mixed uniformly with the ore slurry prior to the introduction of the sulfidizing agent.

Abstract: The present invention provides a molecular identification method for a single dinoflagellate cyst, including: obtaining crushed liquids of the single dinoflagellate cyst; performing a first PCR amplification with the crushed liquids as a template, SEQ ID NO: 1 (GTCCGCCCTCTGGGTG) as a forward primer, and SEQ ID NO: 2 (TCGCAGTAGTSYGTCTTTAAC) as a reverse primer to obtain an amplification product so as to determine the species of the dinoflagellate cyst. If the first amplification product is unsuitable for sequencing due to weak bands by electrophoresis detection, a second (nested) PCR amplification and sequencing is performed with SEQ ID NO: 1 (GTCCGCCCTCTGGGTG) as a forward primer and SEQ ID NO: 2 (TCGCAGTAGTSYGTCTTTAAC) as a reverse primer to determine the species of dinoflagellate.

Abstract: The present invention provides a molecular identification method for single dinoflagellate cysts, comprising: obtaining the crushed liquids of a single dinoflagellate cyst; performing a first PCR amplification with the crushed liquids as templates, one nucleotide sequence of GTCCGCCCTCTGGGTG as a forward primer of an outer primer, and one nucleotide sequence of TCGCAGTAGTSYGTCTTTAAC as a reverse primer of the outer primer to obtain amplification products, and identify the dinoflagellate cyst based on the result of sanger sequencing. If the first amplification product is unsuitable for sequencing due to weaken bands by electrophoresis detection, a second (nested) PCR amplification and sequencing is performed with one nucleotide sequence of GTCCGCCCTCTGGGTG as a forward primer of an inner primer and one nucleotide sequence of TCGCAGTAGTSYGTCTTTAAC as a reverse primer of the inner primer to determine the species of dinoflagellate.

Abstract: The invention provides methods for treating cancer and compounds that are useful for the treatment of tumors, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates useful for preparing the compounds.

Abstract: The invention provides methods for treating cancer and compounds that are useful for the treatment of tumors, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates useful for preparing the compounds.

Abstract: The invention provides methods for treating cancer and compounds that are useful for the treatment of tumors, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates useful for preparing the compounds.

Abstract: The invention provides methods for treating cancer and compounds that are useful for the treatment of tumors, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates useful for preparing the compounds.

Abstract: The invention provides methods for treating cancer and compounds that are useful for the treatment of tumors, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates useful for preparing the compounds.

Abstract: The invention provides methods for treating cancer and vanadium compounds that are useful for the treatment of tumors, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates useful for preparing the compounds.