Abstract: Provided is an engineered bacterium for producing nervonic acid and/or grease. The genome of the engineering bacterium is integrated with an expression cassette expressing a protein encoded by 3-ketoacyl-CoA synthase (KCS) gene and/or an exterase gene.

Abstract: A use of 1,9-decanediol in retarding urea hydrolysis in soil is provided. It is found that 1,9-decanediol has a dual regulatory effect, which can not only inhibit the nitrification process, but also retard urea hydrolysis and reduce the transformation of urea to other nitrogen forms. As a fat-soluble root exudate, 1,9-decanediol has high stability in soil, is not easy to be leached away, and causes less environmental pollution. It further broadens an application field of 1,9-decanediol and improves an industrial value of 1,9-decanediol.

Abstract: A use of 1,9-decanediol in inhibiting ammonia volatilization from soil is provided. It is found that 1,9-decanediol has dual regulation effects, not only significantly inhibiting ammonia volatilization from soil, but also effectively inhibiting nitrification process, which plays synergistic effects. As a fat-soluble substance, 1,9-decanediol has high stability in soil and is not easy to be separated from nitrogen fertilizer. 1,9-decanediol, as a plant root exudate, also has advantages of being green, safe, and pollution-free, which provides a new method and an idea to expand an application field of 1,9-decanediol and improve an industrial application value of 1,9-decanediol.

Abstract: An application of syringic acid in promoting the inhibition effect of decanediol on the nitrosification activity of nitrosomonas is provided. By inhibiting the activity of a nitrosomonas, the combined use of syringic acid and 1,9-decanediol can more efficiently inhibit a nitrification process in soil and at the plant rhizosphere, increase the nitrogen use efficiency, and reduce leaching of nitrate nitrogen, thereby reducing the loss of nitrogen and discharge of the greenhouse gas nitrous oxide in a denitrification process. The addition of syringic acid in the present invention can reduce the concentration at which 1,9-decanediol functions under the equivalent condition of nitrification inhibition activity, and thus save the relative input cost.

Abstract: A highly integrated multi-channel optical transceiver module based on silicon photonic chip technology includes an integrated silicon photonic chip, an integrated circuit chip, and a printed circuit board assembly. The integrated silicon photonic chip and the integrated circuit chip are both integrated on silicon substrates and are furthered bonded on printed circuit board assembly. The integrated silicon photonic chip includes a silicon photonic transmitter chip and a silicon photonic receiver chip that both connected to optical fiber connectors through the optical fiber patch cord jumpers. The integrated circuit chip includes an integrated circuit transmitter chip that connected to the silicon photonic transmitter chip through a wire bonding, and an integrated circuit receiver chip that connected to the silicon photonic receiver chip through a wire bonding.

Abstract: A highly integrated multi-channel optical transceiver module based on silicon photonic chip technology includes an integrated silicon photonic chip, an integrated circuit chip, and a printed circuit board assembly. The integrated silicon photonic chip and the integrated circuit chip are both integrated on silicon substrates and are furthered bonded on printed circuit board assembly. The integrated silicon photonic chip includes a silicon photonic transmitter chip and a silicon photonic receiver chip that both connected to optical fiber connectors through the optical fiber patch cord jumpers. The integrated circuit chip includes an integrated circuit transmitter chip that connected to the silicon photonic transmitter chip through a wire bonding, and an integrated circuit receiver chip that connected to the silicon photonic receiver chip through a wire bonding.