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Activity maintenance of the Excised branches and a case study of NO_2 exchange between the atmosphere and P.nigra branches

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Journal of Environmental Sciences 2019年第6期31卷 316-326页

作者： Chun Chen Yuzheng Wang Yuanyuan Zhang Xiaoxiu Lun Chengtang Liu Yujing Mu Chenglong Zhang Pengfei Liu Chaoyang Xue Min Song Can Ye Junfeng Liu Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences College of Environmental Science & Engineering Beijing Forest University

The efficient maintenance of the activity of Excised branches is the powerful guarantee to accurately determine gas exchange flux between the detached branches of tall trees and the atmosphere. In this study, the net photosynthetic rate(NPR) of the Excised branches and branches in situ were measured simultaneously by using two photosynthetic instruments to characterize the activity of the Excised branches of Phyllostachys nigra. The ratio of normalized NPR of Excised branches to NPR in situ was used to assess the photosynthetic activity of detached branches. Based on photosynthetic activity, an optimal hydroponics protocol for maintaining activity of Excised P. nigra branches was presented:1/8 times the concentration of Gamborg B5 vitamin mixture with p H = 6. Under the best cultivation protocol, photosynthetic activity of Excised P. nigra branches could be maintained more than 90% within 6 hr in the light intensity range of 200–2000 μmol/(m2·sec) and temperature range of 13.4–28.7°C. The nitrogen dioxide(NO2) flux differences between in situ and in vitro branches and the atmosphere were compared using double dynamic chambers.Based on the maintenance method of Excised branches, the NO2 exchange flux between the Excised P. nigra branches and the atmosphere(from-1.01 to-2.72 nmol/(m2·sec) was basically consistent with between the branches in situ and the atmosphere(from-1.12 to-3.16 nmol/(m2 sec)) within 6 hr. Therefore, this study provided a feasible protocol for in vitro measurement of gas exchange between tall trees and the atmosphere for a period of time.

关键词： Excised branches Activity maintenance NO2 exchange flux Hydroponics Dynamic chamber

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Case Report of Surgical Excision of Non-Communicating Rudimentary Horn of Uterus Present in Adolescent with Dysmenorrhea

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Open Journal of Obstetrics and Gynecology 2015年第9期5卷 455-458页

作者： Majed Alshahrani Department of Obstetrics and Gynecology College of Medicine Najran University Najran Kingdom of Saudi Arabia

Unicornuate uterus with a rudimentary horn is a rare type of müllerian duct malformation. It leads to many obstetrical and gynecological complications. The mean age of presentation was the mid 20 s [1]. It is one of the differential diagnosis of dysmenorrhea in adolescent. A 19-year-old single was present with progressive severe dysmenorrhea and chronic pelvic pain after history right ovarian torsion treated by right salpinoophrectomy. Exploratory laparotomy was performed found unicornuate uterus with right non-communication rudimentary horn. Excised of right rudimentary horn was done. Remove of non-communication rudimentary horn will reduce symptoms of dysmenorrhea and chronic pelvic pain. Proper diagnosis and management will prevent misdiagnosis and good outcome to the patient.

关键词： Rudimentary Horn Dysmenorrhea Surgical Excised

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