Abstract: The disclosure relates to omega-hydroxylated fatty acid derivatives and methods of producing them. Herein, the disclosure encompasses a novel and environmentally friendly production method that provides omega-hydroxylated fatty acid derivatives at high purity and yield. Further encompassed are recombinant microorganisms that produce omega-hydroxylated fatty acid derivatives through selective fermentation.

Abstract: The present disclosure includes a test device for gas and temperature distribution in a goaf, comprising a gas temperature tester configured to analyze gas detection signals and temperature detection signals. In some examples, the test device comprises a gas pump coupled to the gas temperature tester and a connector coupled to the gas pump at an end opposite the gas temperature tester. The test device may comprise a wire spool rotatably coupled to the connector and a cable configured to wind on the wire spool. According to some examples, the cable comprises a test end located on a first end of the wire spool and buried in the goaf. The cable may comprise an output end located on a second end of the wire spool, the second end opposite the first end.

Abstract: The present disclosure includes a method of testing for gas and temperature distribution in a goaf, wherein the test device comprises a cable coupled to a cable dragging machine, the cable including a test end configured to be buried in the goaf; a gas temperature tester configured to test a gas for composition and temperature; and a gas pump configured to continuously pump gas from the test end and transmit it to the gas temperature tester. In some examples, the method comprises placing the test end of the cable in the goaf. According to some examples, the method comprises starting the cable dragging machine and starting the gas pump simultaneously with starting the cable dragging machine. The method may comprise withdrawing the cable, via the cable dragging machine, at a constant speed and analyzing, via the gas temperature tester, the composition and temperature of the gas.

Abstract: An impact-resistant balanced hydro-cylinder with pressure relief and buffering protection comprises a cylinder body (11), a piston (13), a piston rod (14), and a first valve core (21) and a second valve core (51) slidable relative to the cylinder body (11). A closed first gas cavity (22) and a closed second gas cavity (52) are respectively formed between the two valve cores and inner walls of two opposite ends of the cylinder body (11). A closed first oil cavity (32) and a closed second oil cavity (42) are respectively formed between the two valve cores and two end faces of the piston (13). A through hole (33) for the first oil cavity and a through hole (43) for the second oil cavity are respectively provided in the positions on the cylinder body (11) corresponding to the first oil cavity (32) and the second oil cavity (42).

Abstract: An adjustable circular tube energy absorption/storage mechanism based on a paper-cut structure is disclosed according to the present application, which belongs to the technical field of advanced intelligent structure. The mechanism is based on the conventional circular tube and obtained by partially cutting the circular tube. The direction of the slits is along the axial direction of the circular tube. Multiple circular tubes may be arrayed in a specific way according to the actual application requirements. When the circular tube is subjected to axial impact force, the cutting section of the circular tube may deform in a specific direction, the circular tube realizes structural energy absorption and energy storage through local buckling deformation, and after the external force is removed, the circular tube recovers from the deformation and releases stored energy.

Abstract: The present invention discloses heat and cold sources of a THIC air conditioning system, comprising: a compressor (1), a first condenser (2) and a second condenser (3), which are connected successively; a first expansion valve (4) and a second expansion valve (5) respectively connected to the second condenser (3); a first evaporator (6) and a second evaporator (7) respectively connected to the compressor (1); the first evaporator (6) is connected to the first expansion valve (4) to form a first cycle branch; the second evaporator (7) is connected to the second expansion valve (5) to form a second cycle branch; the first cycle branch and the second cycle branch which are connected in parallel connect the second condenser (3) and the compressor (1). The heat and cold sources of the THIC air conditioning system of the present invention have a relatively high refrigeration efficiency so as to significantly reduce energy consumption and protect atmospheric environment.