Abstract: The present disclosure provides a universal preparation method for in-situ growth of a layered double hydroxide (LDH) layer on a substrate surface, and belongs to the technical field of material synthesis. In the present disclosure, an LDH protective layer is grown in situ on a surface of a substrate by means of electrodeposition combined with hydrothermal treatment. Specifically, a seed crystal layer of the LDH is formed on the substrate surface by the electrodeposition, and then obtained LDH seed crystals are crystallized and grown by Ostwald ripening through the hydrothermal treatment. In this way, the LDH protective layer is formed in which an interlayer anion is a nitrate. The protective layer protects the substrate against corrosion. Moreover, since the interlayer anion is the nitrate, the protective layer can be exchanged with other corrosion-inhibiting anions, and is modifiable.

Abstract: Controlled coenzyme Q10 (CoQ10) fermentation production processes and methods for controlling the CoQ10 fermentation production processes are provided in the present disclosure. The processes may include growing a microbial culture of bacteria by providing a carbon source and an oxygen source for a predetermined period of time, thereby producing CoQ10-containing bacteria, carbon dioxide, and lactate in the bacterial culture. During various stages of the production process, the concentration of carbon dioxide may be maintained at predetermined levels, respectively. Alternatively or additionally, during various stages of the production process, the concentration of lactate may be maintained at predetermined levels, respectively.

Abstract: A method for controlled production of glyceric acid includes, during the glyceric acid fermentation process, real-time online monitoring of at least one of the respiratory quotient and redox potential in the fermentation liquid as well as the fermentation process specific growth rate, and controlling their values within the following ranges: 0.1˜1.5 for respiratory quotient, ?300˜50 mV for redox potential, 0.05˜0.8 for specific growth rate. Process parameters for this method are controlled within predetermined ranges by online monitoring at least one of respiratory quotient (RQ) and redox potential as well as the specific growth rate in the fermentation process, thereby meeting the growth requirements of bacteria, effectively promoting the glycerol metabolism and synthesis and improving the conversion rate.

Abstract: Controlled coenzyme Q10 (CoQ10) fermentation production processes and methods for controlling the CoQ10 fermentation production processes are provided in the present disclosure. The processes may include growing a microbial culture of bacteria by providing a carbon source and an oxygen source for a predetermined period of time, thereby producing CoQ10-containing bacteria, carbon dioxide, and lactate in the bacterial culture. During various stages of the production process, the concentration of carbon dioxide may be maintained at predetermined levels, respectively. Alternatively or additionally, during various stages of the production process, the concentration of lactate may be maintained at predetermined levels, respectively.

Abstract: Controlled coenzyme Q10 (CoQ10) fermentation production processes and methods for controlling the CoQ10 fermentation production processes are provided in the present disclosure. The processes may include growing a microbial culture of bacteria by providing a carbon source and an oxygen source for a predetermined period of time, thereby producing CoQ10-containing bacteria, carbon dioxide, and lactate in the bacterial culture. During various stages of the production process, the concentration of carbon dioxide may be maintained at predetermined levels, respectively. Alternatively or additionally, during various stages of the production process, the concentration of lactate may be maintained at predetermined levels, respectively.

Abstract: Systems and processes for recycling printed circuit boards, wherein precious metals may be reclaimed. The system generally includes a number of modules to systematically remove materials from the printed circuit boards and to separate the precious metals from the materials.

Abstract: Controlled coenzyme Q10 (CoQ10) fermentation production processes and methods for controlling the CoQ10 fermentation production processes are provided in the present disclosure. The processes may include growing a microbial culture of bacteria by providing a carbon source and an oxygen source for a predetermined period of time, thereby producing CoQ10-containing bacteria, carbon dioxide, and lactate in the bacterial culture. During various stages of the production process, the concentration of carbon dioxide may be maintained at predetermined levels, respectively. Alternatively or additionally, during various stages of the production process, the concentration of lactate may be maintained at predetermined levels, respectively.

Abstract: A fermentation method for producing coenzyme Q10 is provided, including stepwisly culturing of microbial strains capable of producing coenzyme Q10, wherein key promoting factors are added in each stage of culture, and in the stage of culture in a fermentor, dissolved oxygen feedback-fed batch culture technique is adopted to realize the feedback regulation of the production of coenzyme Q10, so as to improve the yield of coenzyme Q10.

Abstract: A fermentation method for producing coenzyme Q10 is provided, including stepwisly culturing of microbial strains capable of producing coenzyme Q10, wherein key promoting factors are added in each stage of culture, and in the stage of culture in a fermentor, dissolved oxygen feedback-fed batch culture technique is adopted to realize the feedback regulation of the production of coenzyme Q10, so as to improve the yield of coenzyme Q10.