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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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Large borehole with multi-lateral branches: A novel solution for exploitation of clayey silt hydrate

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China Geology 2019年第3期2卷 333-341页

作者： Yan-long Li Yi-zhao Wan Qiang Chen Jia-xin Sun Neng-you Wu Gao-wei Hu Fu-long Ning Pei-xiao Mao Key Laboratory for Natural Gas Hydrate of Ministry of Natural Resources Qingdao Institute of Marine GeologyChina Geological SurveryMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resource Pilot National Laboratory for Marine Science and TechnologyQingdao 266071China Faculty of Engineering China University of GeosciencesWuhan 430074China

Raising the in situ decomposition rate of natural gas hydrate and increasing the decomposition contact area are two main ways to raise the productivity of hydrate. An exploitation technique based on large borehole with multi-lateral branches (LB & MB) was proposed in this paper. This technique is mainly intended for the clayey silt hydrate reservoir in the South China Sea, and its main purpose is to alleviate the sand output from formation for maintaining the stability of the reservoir and to greatly increase the gas productivity of the reservoir. In this paper, the following aspects were mainly expounded: definition of the basic geometric parameters for layout of multi-lateral branches in clayey silt hydrate reservoir, simulation of the stimulation effect of a typical well profile with two branches, and prediction and simulation of the reservoir failure risk in a well profile with eight branches. The results show that the LB & MB effectively improves the flow field in the formation, raises the productivity of the reservoir and may also help to decrease the produced water-gas ratio (WGR). When the lateral branches spacing is too small, the failure zones around adjacent lateral branches overlap each other, possibly causing reservoir failure in a larger range. Therefore, the geometric parameters of multi-lateral branches depend on the dual control of the productivity and geotechnical risk factor of reservoir. Further study is being carried out, so as to obtain the optimal combination of parameters of multi-lateral branches.

关键词： Natural gas hydrate Clayey silt Multi-lateral branches Stimulation Numerical simulation Hydrate exploration engineering South China Sea China

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Design and analysis of novel cutter roller of branches chopping machine

Design and analysis of novel cutter roller of branches chopp...

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2015 2nd International Conference on Machinery,Materials Engineering,Chemical Engineering and Biotechnology(MMECEB 2015)

作者： Zhu Zhifang Jiangxi Province Key Laboratory of precision drive and control Nanchang Institute of Technology

ISBN: (纸本)9781510819092

Traditional branches chopped finely chopped device volume is larger,cutting tool wears,big impact.This article is based on the shortcomings of traditional cutter,and put forward a kind of reduced chopped device volume,reduce the impact and abrasion of involute arc type knife plate.After the arc can make the involute type knife cutting branches arc in contact with the knife,not reduce impact and abrasion.The knife roller device by six involute knife stick a patchwork,reduce the blade by stress,prolong service life.

关键词： Branch chopper Knife roller Involute INVOLUTES Knives Knitters Diluents CUTTERS abrasion branches arcs service life Blades SCROLL roller device

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Effects of the structure of the branches on the two-photon absorption properties for the multi-branched molecules with nitrogen (N) as coupling center

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Science China Chemistry 2008年第1期51卷 92-96页

作者： SUN XueQin ZHAO Xian ZHOU ShuLan LI BaiDong CHENG XiuFeng State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Department of Science and Technology of Shandong Province Jinan 250011China

In order to investigate the effects of the structure of branches on the TPA properties for multi-branched molecules, the TPA cross section is calculated by using ZINDO/SOS method. The investigated mole- cules have different branches (chomorfores based on stilbene, dithienothiophene and flourene) with nitrogen(N) as coupling center. The results show that the cooperative enhancement in multi-branched molecules depends on the structures of the branches and the structures of branches play an important role in the enhancement of the TPA cross section. The designed molecules with stilbene and dithie- nothiophene as branched possess relatively larger two-photon absorption cross sections.

关键词： structure of branches TPA properties ZINDO/SOS multi-branched molecules

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A Neural Based Modeling Approach for Drying Kinetics Analysis of Mint branches and Their Fractions (Leaves and Stems)

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Advances in Chemical Engineering and Science 2017年第2期7卷 154-174页

作者： Aline de Holanda Rosanova Gustavo Dias Maia Fábio Bentes Freire Maria do Carmo Ferreira Graduate Program of Chemical Engineering Federal University of S&atilde o Carlos S&atilde o Carlos Brazil Chemical Engineering Department Federal University of S&atilde o Carlos S&atilde o Carlos Brazil

This work is aimed at investigating regular mint (Mentha × villosa) drying behavior and assessing how the heterogeneous composition of plants affects their drying kinetics. Drying kinetics and sorption isotherms were evaluated for whole branches and their fractions (leaves and stems). Stems and leaves were characterized by measurement of dimensions, apparent density and initial moisture content. The moisture sorption isotherms were obtained under temperatures of 30°C, 40°C and 50°C for branches, stems and leaves and the data were fitted to the GAB model. Mint branches and their fractions were oven dried at temperatures from 40°C to 70°C?and were obtained kinetic curves for each part. Water sorption patterns were similar for leaves and stems and the GAB model described well the sorption behavior of both materials. At a constant temperature, the drying rates were higher for leaves in comparison to stems and the differences increased as the temperature was raised. Therefore, depending on drying conditions, the moisture distribution in dried branches might be significantly different. Since the leaves constitute the major fraction in branches, the drying rates of branches were closer to those of leaves. The kinetic curves were fitted to a diffusion model based on an analytical solution of Fick’s second diffusion law and to an empirical model based on artificial neural network (ANN). The results showed that the model based on the ANN predicted the drying kinetics of the different parts better than the diffusive model. A single network was built to describe the kinetic behavior of branches and fractions in the whole range of temperatures investigated. The diffusive model based on fitting effective diffusivity did not provide good predictions of moisture content, probably because neither the dependence of effective diffusivity on the moisture content nor the heterogeneity and shrinking of static beds were considered.

关键词： Aromatic Herbs Regular Mint branches Stems Sorption Isotherms Oven Drying Artificial Neural Network

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Highly cross-linked Si-Cu alloy nanotubes and hierarchical nanowire branches for high performance Si-loaded lithium-ion batteries

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Science Foundation in China 2016年第3期24卷 50-50页

With the support by the National Natural Science Foundation of China,the research teams led by Prof.Yu Linwei(余林蔚)and Prof.Xu Jun in the National Laboratory of Solid State Microstructures/School of Electronics Science and Engineering,Nanjing University,have achieved new breakthroughs in high performance Si-loadedlithium ion batteries.These results were published in Advanced Functional

关键词： nanotubes hierarchical branches lithium Nanjing Highly loaded anode hollow conductive

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Editorial commentary on the special issue of Advances in Nanomedicine

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The Journal of Biomedical Research 2021年第4期35卷 253-254页

作者： Erik Reimhult Gradimir Misevic Department of Nanobiotechnology Institute for Biologically Inspired MaterialsUniversity of Natural Resources and Life SciencesVienna1190 ViennaAustria Research and Development Gimmune GmbH6302 ZugSwitzerland.

Nanomedicine is a vast multidisciplinary field of life sciences.It assembles branches of the fundamental research disciplines biology,physics,and chemistry with medicine and their associated application technologies a... 详细信息

关键词： Editorial branches medicine

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Prediction of microvascular invasion in hepatocellular carcinoma with preoperative imaging radiomic analysis: Is it ready for prime time?

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Hepatobiliary & Pancreatic Diseases International 2019年第3期18卷 289-290页

作者： Gang Xu Hua-Yu Yang Hai-Feng Xu Department of Liver Surgery Peking Union Medical College (PUMC) Hospital PUMC & Chinese Academy of Medical Sciences

Microvascular invasion (MVI), also known as microvascular tumor embolism, refers to the cancer cell nest in vessels lined with endothelial cells. MVI may be found in the small branches of the portal vein and hepatic v... 详细信息

关键词： MVI branches vessels

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在分与合之间

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教育学 2006年第10期

作者：程天君

教育是一种复杂的社会活动，对其考察不仅有必要，而且也有可能基于多种不同的视角。基于不同视角的分科研究，根源于人之认识的有限性和现实的无限性之间的基本矛盾，满足着专业分化与研究者“栖身”的实际需要。但我国教育研究的一个... 详细信息

教育是一种复杂的社会活动，对其考察不仅有必要，而且也有可能基于多种不同的视角。基于不同视角的分科研究，根源于人之认识的有限性和现实的无限性之间的基本矛盾，满足着专业分化与研究者“栖身”的实际需要。但我国教育研究的一个突出现象是各分支学科的自我封闭色彩较浓，不同学科之间往往过于强调独立与独自，忽视关联与协作；与学科之间有“分”无“合”的问题相联的现象便是中国教育学界长期以来缺少真正意义上的学术批评与理论争鸣，对话之难、协作之难似已成为一种顽症。故此，教育学分支学科当在深入研究各自“学科层面”的前提下加强结合与融通，以达到对教育问题的全面把握与整体解决，并促进不同学科的彼此互济与共同繁荣。

关键词：教育研究分支学科视角互补　　educational research branches complementary perspectives

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Proteomic Analysis of Chrysanthemum Lateral Buds after Removing Apical Dominance Based on Label-Free Technology

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Phyton-International Journal of Experimental Botany 2022年第3期91卷 525-539页

作者： Sicong Zheng Jingjing Song Cheng Luo Xin Li Qiqi Ma Beibei Jiang Qinglin Liu Yuanzhi Pan Department of Ornamental Horticulture Sichuan Agricultural UniversityChengdu611130China

Studying the genetic basis and regulatory mechanism of chrysanthemum lateral bud outgrowth is of great significance for reduction the production cost of cut chrysanthemum.To clarify the molecular basis of lateral bud elongation after removal of apical dominance in chrysanthemum,label-free quantification analysis was used to analyze the proteome changes after apical bud removal.Quantitative real-time PCR(qPCR)was used to analyze the changes in the expression of three plant hormone-related genes.A total of 440 differentially expressed proteins were successfully identified at three time points during the lateral bud elongation.The number of differentially expressed proteins in the three stages(24 h/0 h,48 h/0 h,48 h/24 h)were 219,332,and 97,respectively.The difference in expressed proteins in the three comparison stages mainly involves RNA processing and modification;translation,ribosomal structure and biogenesis;Posttranslational modification,protein turnover,and chaperones.Path analysis showed that there was various physiological activities in the process of lateral bud dormancy breaking and elongation,which involved energy metabolism,biosynthesis,signal transduction and stress response in the growth process of lateral buds.qPCR indicated that the expression of cytokinin synthesis related gene was significantly increased after the removal of apical dominance,while the expression of strigolactones synthesis related gene experiences a dramatic fall to promote the development of the lateral buds.However,there was a drop before a slight increase in the expression of the auxin synthesis related gene,which was mainly due to the removal of apical dominance that led to the loss of indoleacetic acid in the main stem.However,with formation of the new apical source,indoleacetic acid can be released again.

关键词： branches proteins decapitation proteome 4D label-free quantification analysis quantitative real-time PCR

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