Comparison of several displacement-based theories by predicting thermal response of laminated beam

Ren Xiaohui,Chen Wanji 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.33 No.6

A New Method for Faster Backpropagation Learning

Yuan Zeng Ren,Shen Xiaohui 대한전자공학회 1994 ICONIP : International Conference On Neural Inform Vol.3 No.2

Synthesis and characterization of magnetic metal–organic framework for the adsorptive removal of Rhodamine B from aqueous solution

Haochi Liu,Xiaohui Ren,Ligang Chen 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-

Adsorptive removal of Rhodamine B (RhB) on a novel kind of magnetic metal–organic framework (MOF)was studied in view of adsorption isotherm, thermodynamics and kinetics. The adsorbent wascharacterized by physical property measurement system, X-ray diffraction and scanning electronmicroscopy. The adsorption isotherm of RhB on magnetic MOF followed the Freundlich model. Theresultant kinetics data was well described by the pseudo-second-order model. Most of the RhB wasremoved from the aqueous solution within 30 min. Thermodynamic parameters including Gibbs freeenergy, enthalpy, and entropy of adsorption were obtained. The result confirmed that the adsorption iscontrolled by an entropy effect rather than an enthalpy change. The maximum removal has beenachieved in the pH range of 4–8 at 150 rpm. The sorbent can be used at least five times after washingwith methanol including HCl (0.001 mol L 1). The p p stacking interaction and electrostatic interactionmay play an important role in the adsorption of RhB onto magnetic MOF. Compared with otheradsorbents, this kind of magnetic material demonstrated a superior dye adsorption capability.

Integrated Modeling between Smart Substation and Dispatch Automation System

Deng, Yong,Mi, Weimin,Ren, Xiaohui,Xu, Dandan,Chen, Zhengping 대한전기학회 2014 The Journal of International Council on Electrical Vol.4 No.4

Based on technical supporting systems for smart grid dispatch and smart substation system and according to the functional demand of dispatch master station to the substation, an integrated modeling scheme for coordinated sharing of models/images and seamless communication between dispatch master station and smart substation is proposed, by which practicable converting rules between IEC 61850-based model and IEC 61970-based model are drafted; a unified data model-based mapping approach for IEC 61850-based model and IEC 61970-based model is put forward; by means of splitting/merging technique of models and self-converting technique of Ids of graphs and so on, the integrated modeling between dispatch master station and smart substation is implemented; utilizing message bus service of dispatch master station and manufacturing message specification (MMS) protocol stack, the IEC 61850 protocol-based communication at dispatch master station side is attained, thus the coordinated sharing of models/images and seamless communication between smart substation and dispatch master station is implemented, and the capacity of information interaction between smart substation and dispatch master station is increased and the workload of model coordination in heterogeneous systems is reduced.

The Effect of pH on the Efficiency of an SBR Processing Piggery Wastewater

LiLong Yan,Yu Liu,Yuan Ren,Xiaohui Wang,Haijing Liang,Ying Zhang 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.6

To treat piggery wastewater efficiently, thehydrolysis of urea (mainly derived from swine urine) inpiggery wastewater with the change of sewage pH must beconsidered. Using activated sludge, piggery wastewaterwas treated in a sequencing batch reactor (SBR), and theeffects of influent pH on SBR processing efficiency, sludgesettle ability, and sludge activity were investigated. Theresults showed that a high influent pH value contributed tothe improvement of the removal rate of ammonia nitrogenand reduction of the chemical oxygen demand (COD). When the influent pH was between 9.0 and 9.5, the removalrate of ammonia nitrogen was higher than 90%, and thereduction of COD from its original value was 80%. Theinfluent pH had a greater influence on sludge concentrationand sludge activity. When the influent pH increased from7.0 to 9.5, the sludge concentration increased from 2,350 to3,947 mg/L in the reactor, and the activities of ammoniumoxidizing bacteria (AOB) and nitrite oxidizing bacteria(NOB) first increased and then decreased. When theinfluent pH was 9.0 and 8.0, the maximum values (0.48 gO2/(g MLSS/day) and 0.080 g O2/(g MLSS/day)) werereached, and the sludge settling ratio was nearly steadybetween 20 and 35% in each reactor.

The Effect of Carbon Nanomaterials on Senescence of Cut Flowers in Carnation (Dianthus caryophyllus L.)

Di Zhang,Xiaotong Chen,Jiangyuan Sheng,Yafei Zhang,Xiaohui Shen,Li Ren 한국원예학회 2021 원예과학기술지 Vol.39 No.3

Carbon nanomaterials (CNMs) have remarkable chemical, physical, electrical, and structural properties and favorable biocompatibility. This study used carnation (Dianthus caryophyllus L.) cut flowers as a model to evaluate the protective effects of 3 kinds of CNMs (single-walled carbon nanotubes [SWCNT], graphene quantum dots [GQD], and fullerenes [C60]) on the antioxidant activity and senescence of plant cells. We found that 1 mg·L<SUP>-1</SUP> C60 and 25 mg·L<SUP>-1</SUP> GQD extended the vase life (VL) of carnation by approximately 10%. SWCNT cannot be absorbed and transported by plant vascular tissue, and higher concentrations of SWCNT can block vascular tissue, leading to decreased VL. Physiological tests have shown that the The malondialdehyde (MDA) and hydroxyl radical (OH·) levels significantly decreased after the GQD and C60 treatments, and the main factors that cause cell damage changed from H₂O₂ to OH·. The in vitro Fenton reaction and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay indicated that both C60 and GQD may inhibit OH· generation by approximately 10% to 15%, and GQD had higher DPPH free radical scavenging activity. Accordingly, a suitable concentration of C60 and GQD can influence reactive oxygen species metabolism and downstream biological events, including the cell redox state, the antioxidant system, and membrane lipid peroxidation, effectively delaying senescence and abscission of plant tissue.

Involvement of Lysosome Membrane Permeabilization and Reactive Oxygen Species Production in the Necrosis Induced by Chlamydia muridarum Infection in L929 Cells

( Lixiang Chen ),( Cong Wang ),( Shun Li ),( Xin Yu ),( Xue Liu ),( Rongrong Ren ),( Wenwen Liu ),( Xiaojing Zhou ),( Xiaonan Zhang ),( Xiaohui Zhou ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.4

Chlamydiae, obligate intracellular bacteria, are associated with a variety of human diseases. The chlamydial life cycle undergoes a biphasic development: replicative reticulate bodies (RBs) phase and infectious elementary bodies (EBs) phase. At the end of the chlamydial intracellular life cycle, EBs have to be released to the surrounded cells. Therefore, the interactions between Chlamydiae and cell death pathways could greatly influence the outcomes of Chlamydia infection. However, the underlying molecular mechanisms remain elusive. Here, we investigated host cell death after Chlamydia infection in vitro, in L929 cells, and showed that Chlamydia infection induces cell necrosis, as detected by the propidium iodide (PI)-Annexin V double-staining flow-cytometric assay and Lactate dehydrogenase (LDH) release assay. The production of reactive oxygen species (ROS), an important factor in induction of necrosis, was increased after Chlamydia infection, and inhibition of ROS with specific pharmacological inhibitors, diphenylene iodonium (DPI) or butylated hydroxyanisole (BHA), led to significant suppression of necrosis. Interestingly, live-cell imaging revealed that Chlamydia infection induced lysosome membrane permeabilization (LMP). When an inhibitor upstream of LMP, CA-074-Me, was added to cells, the production of ROS was reduced with concomitant inhibition of necrosis. Taken together, our results indicate that Chlamydia infection elicits the production of ROS, which is dependent on LMP at least partially, followed by induction of host-cell necrosis. To our best knowledge, this is the first live-cell-imaging observation of LMP post Chlamydia infection and report on the link of LMP to ROS to necrosis during Chlamydia infection.