摘要:
A method of vanillin production from ferulic acid with a high concentration by biotransformation using a Streptomyces sp. strain is claimed in this invention. This strain is named as Streptomyces sp. V-1, which has been deposited in China Center for Type Culture Collection on Jul. 12, 2006 with the number of CCTCC M 206065. Using this strain, high concentration of vanillin fermentation broth is obtained from ferulic acid by biotransformation in GY biotransformation medium. With the addition of macroporous adsorbent resin DM11, the concentration of vanillin can be greatly improved. The advantage of this invention is less environmental pollution, high product concentration, less by-product, short processing cycle, low production cost, simple product extraction, clean production process, product environmental friendly, safe and reliable, which solves many difficulties in the vanillin production from botanical raw material extraction or chemical synthesis, and therefore it has good application prospect.
摘要:
[Object] To simply and accurately determine the position of an edge, the depth or the height of a flaw including a surface crack, a corroded portion near the surface layer of a thick specimen, and a minute damage.[Solving Means] An ultrasonic flaw detection method causes an ultrasonic wave 16 to be incident on a specimen 6 from an oblique direction, detects a diffracted wave 17 generated at an edge of a flaw 20 in the specimen 6 above the flaw, and determines the position of the edge of the flaw 20 from a front surface 13 of the specimen 6 using a triangular method from an entire beam path Wt of a component 18, which directly propagates above the flaw 20, of the diffracted wave, the entire beam path passing through the flaw from the position of incidence of the component 18, and an interval S between the position of incidence and the position of detection of the ultrasonic wave or from the difference (tt−ts) between the propagation time of a surface wave 15, to which the above relations reflect, to reception and the propagation time of the diffracted wave 18, which directly propagates above the flaw, to reception.
摘要:
A toilet featuring a lift and clean toilet seat hinge includes a toilet bowl, toilet seat, and the hinge includes a hinge base, a post, and a flap for closing the hinge base. The mounting post is provided with an expandable head and the flap includes a ring for expanding the head in order to releasably lock the mounting post to the toilet seat hinge base.
摘要:
A toilet flush water supply device for supplying flush water to a flush water tank of a flush toilet is disclosed. The toilet flush water supply device comprises a water supply pipe connected to an external water supply source, a water supply valve for switching between spouting and stopping of flush water supplied from the water supply pipe into the flush water tank, a float for switching between the spouting and stopping of the above water supply valve by a vertical movement thereof linked to fluctuations in the flush water level within the flush water tank, and a float guide disposed on the outer surface of the water supply pipe for guiding the vertical motion of the float.
摘要:
The present invention is to provide a gateway device which, when determining that a network device connected thereto is a web camera and receives a packet from the web camera, is able to automatically add a port of the gateway device connected with the network device to a VLAN designated by the gateway device and then add a specific group code to the packet to specify the VLAN, such that the gateway device can transmit the packet to the VLAN according to the specific group code. The gateway device is then able to automatically set transmission priority of the packet to a high priority, such that after the packet is transmitted out of the VLAN, the packet can be transmitted through a transmission channel with the high priority, so as to improve the convenience of using the web camera and assure the transmission priority of the packet in the VLAN.
摘要:
The measurement of a flaw height in a thick welded portion of a stainless steel specimen, which is difficult to perform by the TOFD method, can be conducted with more ease, with higher accuracy and in a shorter time than in the case of using tip echo techniques. In addition, it is possible to reduce variations in measurement results among individual inspectors.An ultrasonic wave 21 is launched by a transmitting probe 1 into a specimen 20 in a direction oblique to a flaw 24 to generate diffracted waves at the tip 25 of the flaw 24, then a diffracted wave 22 propagating upward directly from the flaw 24 and a diffracted wave 23 propagating upwardly of the flaw 24 after once reflected off the back 27 are received by a receiving probe 2 disposed above the flaw 24, and the height of the tip of the flaw 24 from the back 27 is measured from the propagation time difference between the received diffracted waves.
摘要:
A plurality of ultrasonic flaw detection methods can be switched and executed by a simple operation. An ultrasonic flaw detection apparatus includes a switching circuit 3 for permitting an angle probe 1 and a normal probe 2 to be arbitrarily switched to a transmission unit T and a reception unit R of a flaw detector. The switching circuit 3 can select an angle flaw detection mode for transmitting and receiving an ultrasonic beam only by the angle probe, an SPOD mode for transmitting the ultrasonic beam by the angle probe and receiving a diffracted wave by the normal probe and a flaw detection mode executed by a combination of angle flaw detection mode.
摘要:
To simply and accurately determine the position of an edge, the depth or the height of a flaw including a surface crack, a corroded portion near the surface layer of a thick specimen, and a minute damage.An ultrasonic flaw detection method causes an ultrasonic wave 16 to be incident on a specimen 6 from an oblique direction, detects a diffracted wave 17 generated at an edge of a flaw 20 in the specimen 6 above the flaw, and determines the position of the edge of the flaw 20 from a front surface 13 of the specimen 6 using a triangular method from an entire beam path Wt of a component 18, which directly propagates above the flaw 20, of the diffracted wave, the entire beam path passing through the flaw from the position of incidence of the component 18, and an interval S between the position of incidence and the position of detection of the ultrasonic wave or from the difference (tt−ts) between the propagation time of a surface wave 15, to which the above relations reflect, to reception and the propagation time of the diffracted wave 18, which directly propagates above the flaw, to reception.
摘要:
The present invention is to provide a gateway device which, when determining that a network device connected thereto is a web camera and receives a packet from the web camera, is able to automatically add a port of the gateway device connected with the network device to a VLAN designated by the gateway device and then add a specific group code to the packet to specify the VLAN, such that the gateway device can transmit the packet to the VLAN according to the specific group code. The gateway device is then able to automatically set transmission priority of the packet to a high priority, such that after the packet is transmitted out of the VLAN, the packet can be transmitted through a transmission channel with the high priority, so as to improve the convenience of using the web camera and assure the transmission priority of the packet in the VLAN.