[Clinical analysis and countermeasures of 739 cases treated in the emergency department of stomatology in general hospital during COVID-19 epidemic].

Purpose: In this paper, based on the age, sex, disease type, and consultation time of dental emergency during COVID-19 epidemic, a comprehensive analysis of dental emergency management and prevention and control of COVID-19 was conducted.

Methods: A total of 739 emergency dental cases were collected from January 29 2020 to February 28 2020. They were divided into 3 groups，including adolescents (≤18 years), young adults (18 ~ 60 years), and elderly ( ≥60 years old).

[Synthetic PTHrP1-36 and its role in promoting alveolar bone formation].

Purpose: To synthetise mouse parathyroid hormone related protein 1-36 (PTHrP1-36) and to study its role in promoting alveolar bone formation.

Methods: pGEX-2TK/ PTHrP1-36 was constructed and PTHrP1-36 was expressed. The role of PTHrP1-36 in promoting alveolar bone formation was observed by treating bone marrow cells in vitro and ovariectomy-induced maxillofacial osteoporosis in vivo.

[Effects of high temperature on Bt protein content and nitrogen metabolic physiology in boll wall of Bt cotton].

Bt cotton cultivar Sikang 1 (a conventional cultivar) and Sikang 3 (a hybrid cultivar) from China, and 99B (a conventional cultivar) and Daiza 1 (a hybrid cultivar) from USA were selected as experimental materials, the ball wall Bt protein content and nitrogen metabolic physiology were investigated under different high temperature levels at peak boll stage. The results showed that the Bt protein content of boll wall decreased with the increasing temperature. Compared with the control (32 °C, the boll wall Bt protein content decreased significantly when the temperature was above 38 °C for the conventional cultivars and above 40 °C for the hybrid cultivars.