Abstract: Described in detail herein is a system for determining the validity of a transaction in a distributed network environment. The system includes a plurality of peer servers. The system elects a set of peer leaders from the plurality of peer servers. The set of peer leaders broadcast a first set of indices associated with a first subset of transactions, received from the plurality of peer servers, to one or more of the plurality of peer servers. The set of elected peer leaders execute a first instance of a binary agreement protocol based at least in part on a second subset of indices associated with a second subset of the transactions. The set of elected peer leaders output a consensus vector comprising one or more of the transactions.

Abstract: Described in detail herein is a system for determining the validity of a transaction in a distributed network environment. The system includes a plurality of peer servers. The system elects a set of peer leaders from the plurality of peer servers. The set of peer leaders broadcast a first set of indices associated with a first subset of transactions, received from the plurality of peer servers, to one or more of the plurality of peer servers. The set of elected peer leaders execute a first instance of a binary agreement protocol based at least in part on a second subset of indices associated with a second subset of the transactions. The set of elected peer leaders output a consensus vector comprising one or more of the transactions.

Abstract: Described in detail herein is a system for determining the validity of a transaction in a distributed network environment. The system includes a plurality of peer servers. The system broadcast a first transaction to the plurality of peer servers. The system further elects at least one peer leader from the plurality of peer servers. The system further broadcasts a first set of indices associated with a first subset of transactions, received from the plurality of peer servers, to one or more of the plurality of peer servers. The system further executes a first instance of a binary agreement protocol based at least in part on a second subset of indices associated with a second subset of the transactions. The system further outputs a consensus vector comprising one or more of the transactions.

Abstract: A method for catalytic asymmetric synthesis of a phosphorus-stereogenic (P-stereogenic) nucleoside derivative of formula (3) and a catalyst used therein. The P-stereogenic nucleoside derivative (3) can be hydrolyzed to obtain remdesivir.

Abstract: A method for catalytic asymmetric synthesis of a phosphorus-stereogenic (P-stereogenic) nucleoside derivative of formula (3) and a catalyst used therein. The P-stereogenic nucleoside derivative (3) can be hydrolyzed to obtain remdesivir. Specifically, a nucleoside and phosphoryl chloride are subjected to asymmetric reaction under the catalysis of a chiral bicyclic imidazole catalyst in the presence of a base to produce the P-stereogenic nucleoside derivative.

Abstract: The present disclosure provides a cable structure, a power cord structure and an electrical device. The cable structure includes: a power cord, a shell arranged on the power cord, and an antenna arranged in the shell. Because the antenna is arranged in the shell and does not need to be exposed to the outside, it works in a good environment and can be protected from being damaged easily and, thereby guaranteeing the working reliability and stability of the antenna. Because the shell is arranged on the power cord, the electrical device does not need to be provided with additional antenna devices, thereby improving the overall appearance, convenience for carrying and the user experience. The shell is arranged on the power cord, the position of the shell can be at the middle, the front or different positions depending on requirements of the power cord, therefore satisfying different user needs.

Abstract: A method for preparing chiral ?-secondary amino alcohol includes: adding into a solvent an acid addition salt of ?-secondary amino ketone represented by general formula (1), an alkali, a metal salt additive and a diphosphine-rhodium complex, so as to carry out a reaction in a hydrogen atmosphere and obtain a chiral ?-secondary amino alcohol compound represented by general formula (2). In general formula (2), Ar represents an aryl group with or without substituent group(s), R represents an alkyl group or an aralkyl group, and HY represents an acid. The synthesis scheme has a simple process, the metal salt additive remarkably improves the effect of a rhodium-catalyzed asymmetric hydrogenation technology, and accordingly, the reaction yield and the optical purity of a product are improved, the production process is simplified, production costs are reduced, and the synthesis scheme is highly suitable for mass industrial production.

Abstract: The present disclosure provides a power cord plug, a power cord structure and an electrical device for a power cord, and the power cord plug includes: a shell, and a communication device and an antenna arranged in the shell. According to the power cord plug provided by the present disclosure, as the communication device and the antenna are arranged in the shell of the power cord plug, the communication device is far away from the electrical device, so the communication ability of the communication device will not be shielded by the metal shell of the electrical device, and will not be affected by a motor, a circuit board, coils, a magnetron and other factors in the electrical device, or affected by the high temperature caused by the operation of the equipment, accordingly the communication device works in a good environment, and the working reliability and stability of the communication device are guaranteed.

Abstract: The present disclosure provides a cable structure, a power cord structure and an electrical device. The cable structure includes: a power cord, a shell arranged on the power cord, and an antenna arranged in the shell. Because the antenna is arranged in the shell and does not need to be exposed to the outside, it works in a good environment and can be protected from being damaged easily and, thereby guaranteeing the working reliability and stability of the antenna. Because the shell is arranged on the power cord, the electrical device does not need to be provided with additional antenna devices, thereby improving the overall appearance, convenience for carrying and the user experience. The shell is arranged on the power cord, the position of the shell can be at the middle, the front or different positions depending on requirements of the power cord, therefore satisfying different user needs.

Abstract: A method for preparing chiral ?-secondary amino alcohol includes: adding into a solvent an acid addition salt of ?-secondary amino ketone represented by general formula (1), an alkali, a metal salt additive and a diphosphine-rhodium complex, so as to carry out a reaction in a hydrogen atmosphere and obtain a chiral ?-secondary amino alcohol compound represented by general formula (2). In general formula (2), Ar represents an aryl group with or without substituent group(s), R represents an alkyl group or an aralkyl group, and HY represents an acid. The synthesis scheme has a simple process, the metal salt additive remarkably improves the effect of a rhodium-catalyzed asymmetric hydrogenation technology, and accordingly, the reaction yield and the optical purity of a product are improved, the production process is simplified, production costs are reduced, and the synthesis scheme is highly suitable for mass industrial production.

Abstract: Provided are a novel 1,2-bis(dialkylphosphino)-4,5-(methylenedioxy)benzene derivative that forms a metal complex having particularly high asymmetry induction capacity and catalytic activity on ?-dehydroamino acids, a method for manufacturing the same, a metal complex having this 1,2-bis(dialkylphosphino)-4,5-(methylenedioxy)benzene derivative as a ligand, and an asymmetric hydrogenation method using this metal complex. A 1,2-bis(dialkylphosphino)-4,5-(methylenedioxy)benzene derivative represented by general formula (1). (In the formula, R1 and R2 represent an alkyl group having 1-10 carbon atoms, and R1 and R2 have different numbers of carbon atoms.

Abstract: Provided are a novel 1,2-bis(dialkylphosphino)-4,5-(methylenedioxy)benzene derivative that forms a metal complex having particularly high asymmetry induction capacity and catalytic activity on ?-dehydroamino acids, a method for manufacturing the same, a metal complex having this 1,2-bis(dialkylphosphino)-4,5-(methylenedioxy)benzene derivative as a ligand, and an asymmetric hydrogenation method using this metal complex. A 1,2-bis(dialkylphosphino)-4,5-(methylenedioxy)benzene derivative represented by general formula (1). (In the formula, R1 and R2 represent an alkyl group having 1-10 carbon atoms, and R1 and R2 have different numbers of carbon atoms.

Abstract: A process for recovering lecithin from oil- and lecithin-containing mixtures, comprising extracting a lecithin/oil mixture with an extractant selected from the group consisting of a hydrocarbon having 3 carbon atoms, an unbranched hydrocarbon having 4 carbon atoms, a branched hydrocarbon having 4 carbon atoms, and mixtures thereof, at a pressure of from 1 to 8 MPa and a temperature of from 20 to 100.degree. C., which conditions ensure liquid phase extraction with the development of two liquid phases, one of which is an oil enriched liquid hydrocarbon phase and the other of which is a lecithin enriched hydrocarbon phase; separating the two liquid hydrocarbon phases; and recovering substantially lecithin-free oil from the oil-enriched phase and substantially oil-free, pure lecithin from the lecithin-enriched phase.