Peking University

Shandong University

Shandong Jianzhu University

Yongbo Wang

Lei Wang

Yong Wang

Lei Ma

Lei Zhang

Dangxiao Wang

Yuru Zhang

Peijun Lv

Hui Li

Yuchun Sun

Min Guo

Ning Dai

Wanpeng Lu

Xiaoling Ma

Wenqi Ge

Mingzhi Yu

Chaohui Shi

Ping Cui

Guoning Li

Haihua Cui

Shoujun Zhou

Huifu Li

Dongdong Wang

A method for synthesizing and application embedded alkaline earth metal oxide solid alkali includes: firstly, synthesizing an alkaline earth metal organic skeleton with single or multiple alkaline earth metals (Mg, Ca and Sr) as central metal elements; and then controlling the heating process to carry out high-temperature pyrolysis in a non-oxidizing atmosphere, so that the alkaline earth metal oxide are embedded in the nano carbon sheet to obtain a solid alkali catalyst. Finally, the catalyst is used to catalyze the transesterification of palm oil and methanol to produce biodiesel. The active site of the solid alkali obtained by the method is anchored on the nano-like carbon sheet, so that the active site is directly exposed on the surface of the catalyst, the catalytic activity is improved, the loss of the active site is inhibited, and the stability of the solid alkali catalyst is enhanced.

Preparation method of embedded alkaline earth metal oxide solid alkali and application thereof in biodiesel production

A digital control laser automatic tooth preparation method and device and a tooth positioner are provided. The device includes an intra-oral three-dimensional scanner, a dental laser, an oral working end, an oral and maxillofacial cone beam CT scanner, a computer, a tooth positioner, a negative-pressure suction device and a real-time monitoring device. The computer is connected respectively with the intra-oral three-dimensional scanner, the dental laser, the oral working end, the oral and maxillofacial cone beam CT scanner, the negative-pressure suction device, and the real-time monitoring device. The dental laser is connected with the oral working end of the digital control laser tooth preparation control system through a light guiding arm (). The oral working end of the digital control laser tooth preparation control system is connected with the tooth positioner and the real-time monitoring device. The negative-pressure suction device is connected with the tooth positioner.

Method and apparatus for tooth body automatic preparation by digital controlled laser light and tooth retainer

Growing community of inventors

Shandong, China

Yongbo Wang