Abstract: A Streptococcus suis (S. suis) vaccine is provided. For the S. suis vaccine, an antigen is a protein with an amino acid sequence shown in SEQ ID NO: 2. A preparation method of the S. suis vaccine is provided, including the following steps: mixing a white oil and aluminum stearate to obtain a white oil adjuvant; adding poly sorbate 80 to an aqueous solution of the protein with the amino acid sequence shown in SEQ ID NO: 2, and thoroughly mixing to obtain an antigen solution; and mixing the antigen solution with the white oil adjuvant according to a volume ratio of (0.5-1.5):2, and emulsifying to obtain the S. suis vaccine. An animal immunized with the S. suis vaccine of the present disclosure can effectively resist the attack of S. suis serotype 2, 3, and 31, with a vaccine protection rate as high as 100%.

Abstract: Provided herein are tuberculatin analogs that are useful as antivirals, such as anti-HIV, anti-coronaviral, anti-Ebola viral, and anti-influenza viral agents and methods of use thereof.

Abstract: An automatic auxiliary workover rig includes a silo body arranged on a skid-mounted baseplate, a guide-roller type elevator, a random-folding type traveling block rigid guide device, a truck-mounted folding type manipulator, a slip, a flatcar up-down adjustment device, a detecting and conveying device, and a transfer device. The automatic auxiliary workover rig cooperates with an existing workover rig to complete ascending and descending of a sucker rod of an oil pipe during minor overhaul. The slip is located above a wellhead blowout preventer, and is configured to clamp and loosen the oil pipe of a wellhead. The silo body is configured to store and output the oil pipe. The truck-mounted folding type oil pipe manipulator garbs the oil pipe and then ascend and descend the oil pipe, meanwhile the manipulator is equipped with a height adjusting device to realize flexible joint in tube thread fastening and unfastening.

Abstract: An automatic auxiliary workover rig includes a silo body arranged on a skid-mounted baseplate, a guide-roller type elevator, a random-folding type traveling block rigid guide device, a truck-mounted folding type manipulator, a slip, a flatcar up-down adjustment device, a detecting and conveying device, and a transfer device. The automatic auxiliary workover rig cooperates with an existing workover rig to complete ascending and descending of a sucker rod of an oil pipe during minor overhaul. The slip is located above a wellhead blowout preventer, and is configured to clamp and loosen the oil pipe of a wellhead. The silo body is configured to store and output the oil pipe. The truck-mounted folding type oil pipe manipulator garbs the oil pipe and then ascend and descend the oil pipe, meanwhile the manipulator is equipped with a height adjusting device to realize flexible joint in tube thread fastening and unfastening.

Abstract: The present invention relates to a ceramic powder and special raw material and use thereof. The raw material of the ceramic powder comprises 20-80 mass parts of SiO2, 10-50 mass parts of AlF3 and 0-30 mass parts of regulator. The raw material for preparing the ceramic powder is mixed and crushed, followed by melted into liquid glass at 1200-1400° C., quenched to obtain the ceramic powder. The low temperature co-fired ceramic powder has the following advantages: low sintering temperature (750-850° C.) and controllable sintering shrinkage rate; the dielectric constant of the ceramic block prepared with the ceramic powder is adjustable between 4.5 and 10 (1 MHz), the dielectric loss is less than 0.002, the mechanical strength is high and the preparation process is simple. The ceramic powder may be used for electric devices such as ceramic substrate, resonator, etc. as well as in other microelectronic packaging.

Abstract: The present invention relates to a ceramic powder and special raw material and use thereof. The raw material of the ceramic powder comprises 20-80 mass parts of SiO2, 10-50 mass parts of AlF3 and 0-30 mass parts of regulator. The raw material for preparing the ceramic powder is mixed and crushed, followed by melted into liquid glass at 1200-1400° C., quenched to obtain the ceramic powder. The low temperature co-fired ceramic powder has the following advantages: low sintering temperature (750-850° C.) and controllable sintering shrinkage rate; the dielectric constant of the ceramic block prepared with the ceramic powder is adjustable between 4.5 and 10 (1 MHz), the dielectric loss is less than 0.002, the mechanical strength is high and the preparation process is simple. The ceramic powder may be used for electric devices such as ceramic substrate, resonator, etc. as well as in other microelectronic packaging.