Constant power and constant temperature microwave regeneration of toluene and acetone loaded on microporous activated carbon from agricultural residue

Haiyan Mao,Dingguo Zhou,Zaher Hashisho,Sunguo Wang,Heng Chen,Haiyan (Helena) Wang 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

The effect of flow rate, microwave power, and humidity of purge gas on microwave regeneration ofagricultural based activated carbon saturated with toluene and acetone was investigated. To comparewith microwave heating, conductive heating was also employed to follow the effect on adsorptioncapacity, regeneration ratio, desorption rate, time and energy consumption. Desorption rate of constantpower microwave heating was 32.9% per minute, which was 20 and 40 times higher than constanttemperature microwave and conductive heating, respectively. Energy consumption of microwaveheating (constant power) was only 4.5 kJ/g. Adsorption isotherms data can be well fitted with Dubinin–Radushkevich model.

CO2 Adsorption on the B12N12 Nanocage Encapsulated with Alkali Metals: A Density Functional Study

Haiyan Zhu,Qiyan Zhang,Qinfu Zhao,He Zhao,Yifan Feng,Bingbing Suo,Huixian Han,Qi Song,Yawei Li,Wenli Zou,Haiyan Zhu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.3

Density functional theory (DFT) calculations have been carried out to study the capacity of the B12N12 nanocage encapsulated with alkali metals (Li, Na, K) for the CO2 adsorption and activation. It is found that after encapsulating alkali metals, the alkali metal atoms are closer to one side of clusters instead of exactly lying at the center, and a considerable charge transfers from the inner alkali metal atoms to the B12N12 cage. Besides, the HOMO–LUMO gap (HLG) values of Li@B12N12, Na@B12N12 and K@B12N12 are decreased to about 6 eV, being much smaller than that of the pristine B12N12. Although the geometry structure parameters and the energy differences of M06-2X are slightly different from the ones of ωB97X-D, some identical results of two kinds of functional can be obtained. CO2 can be adsorbed chemically and physically on majority bonds of all the clusters, except for some bonds with large change in bond length and bond indices. The encapsulation of alkali-metal atoms may enhance the physical and chemical adsorption of CO2 on the surface of the clusters, in which Na@B12N12 and K@B12N12 are the most powerful physical and chemical adsorbent for CO2, respectively.

Plant Phenomics: Opportunities and Challenges on Interdisciplinary Research

( Haiyan Cen ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

Tanshinone IIA Protects Endothelial Cells from H2O2-Induced Injuries via PXR Activation

Haiyan Zhu,Zhiwu Chen,Zengchun Ma,Hongling Tan,Chengrong Xiao,Xianglin Tang,Boli Zhang,Yuguang Wang,Yue Gao 한국응용약물학회 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.6

Tanshinone IIA (Tan IIA) is a pharmacologically active substance extracted from the rhizome of Salvia miltiorrhiza Bunge (also known as the Chinese herb Danshen), and is widely used to treat atherosclerosis. The pregnane X receptor (PXR) is a nuclear receptor that is a key regulator of xenobiotic and endobiotic detoxification. Tan IIA is an efficacious PXR agonist that has a potential protective effect on endothelial injuries induced by xenobiotics and endobiotics via PXR activation. Previously numerous studies have demonstrated the possible effects of Tan IIA on human umbilical vein endothelial cells, but the further mechanism for its exerts the protective effect is not well established. To study the protective effects of Tan IIA against hydrogen peroxide (H2O2) in human umbilical vein endothelial cells (HUVECs), we pretreated cells with or without different concentrations of Tan IIA for 24 h, then exposed the cells to 400 μM H2O2 for another 3 h. Therefore, our data strongly suggests that Tan IIA may lead to increased regeneration of glutathione (GSH) from the glutathione disulfide (GSSG) produced during the GSH peroxidase-catalyzed decomposition of H2O2 in HUVECs, and the PXR plays a significant role in this process. Tan IIA may also exert protective effects against H2O2-induced apoptosis through the mitochondrial apoptosis pathway associated with the participation of PXR. Tan IIA protected HUVECs from inflammatory mediators triggered by H2O2 via PXR activation. In conclusion, Tan IIA protected HUVECs against H2O2-induced cell injury through PXR-dependent mechanisms.

Preparation of sub-micron colored particles by controlled emulsion polymerization

Haiyan Gao,안정호,김상효 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4

Colored particles of poly(methyl methacrylate-co-ethylene glycol dimethacrylate) containing three different kinds of dye including Sudan black, Sudan red 7B and Oil blue N were made by emulsion polymerization. In an effort to find a way to prepare particles with size less than 100 nm with the maximized dye content, methanol is added either to the initial reaction media or during the polymerization. It was found that adding methanol is very efficient way to improve the dye incorporation efficiency while maintaining particle sizes less than 100 nm. By properly choosing methanol addition strategy, the dye content inside of particle could be increased up to four or five times and it was found that the optimum strategy of methanol addition is clearly depending on the nature of dye.

Low pH stress responsive transcriptome of seedling roots in wheat (Triticum aestivum L.)

Haiyan Hu,Jie He,Junjie Zhao,Xingqi Ou,Hongmin Li,Zhengang Ru 한국유전학회 2018 Genes & Genomics Vol.40 No.11

Soil acidification is one of major problems limiting crop growth and especially becoming increasingly serious in China owing to excessive use of nitrogen fertilizer. Only the STOP1 of Arabidopsis was identified clearly sensitive to proton rhizotoxicity and the molecular mechanism for proton toxicity tolerance of plants is still poorly understood. The main objective of this study was to investigate the transcriptomic change in plants under the low pH stress. The low pH as a single factor was employed to induce the response of the wheat seedling roots. Wheat cDNA microarray was used to identify differentially expressed genes (DEGs). A total of 1057 DEGs were identified, of which 761 genes were up-regulated and 296 were downregulated. The greater percentage of up-regulated genes involved in developmental processes, immune system processes, multi-organism processes, positive regulation of biological processes and metabolic processes of the biological processes. The more proportion of down-regulation genes belong to the molecular function category including transporter activity, antioxidant activity and molecular transducer activity and to the extracellular region of the cellular components category. Moreover, most genes among 41 genes involved in ion binding, 17 WAKY transcription factor genes and 17 genes related to transport activity were up-regulated. KEGG analysis showed that the jasmonate signal transduction and flavonoid biosynthesis might play important roles in response to the low pH stress in wheat seedling roots. Based on the data, it is can be deduced that WRKY transcription factors might play a critical role in the transcriptional regulation, and the alkalifying of the rhizosphere might be the earliest response process to low pH stress in wheat seedling roots. These results provide a basis to reveal the molecular mechanism of proton toxicity tolerance in plants.

Effects of Antioxidant Tempol on Systematic Inflammation and Endothelial Apoptosis in Emphysematous Rats Exposed to Intermittent Hypoxia

Haiyan Zhao,Yaping Zhao,Xin Li,Leiqian Xu,Fangxin Jiang,Wanju Hou,Lixia Dong,Jie Cao 연세대학교의과대학 2018 Yonsei medical journal Vol.59 No.9

Purpose: Obstructive sleep apnea and chronic obstructive pulmonary disease are independent risk factors of cardiovascular disease(CVD), and their coexistence is known as overlap syndrome (OS). Endothelial dysfunction is the initial stage of CVD; however,underlying mechanisms linking OS and CVD are not well understood. The aim of this study was to explore whether OS canlead to more severe inflammation and endothelial apoptosis by promoting endothelial dysfunction, and to assess the interventioneffects of antioxidant tempol. Materials and Methods: Male Wistar rats (n=66) were exposed to normal oxygen [normal control (NC) group], intermittent hypoxia(IH group), cigarette smoke (CH group), as well as cigarette smoke and IH (OS group). Tempol intervention was assessed inOS group treated with tempol (OST group) or NaCl (OSN group). After an 8-week challenge, lung tissues, serum, and fresh bloodwere harvested for analysis of endothelial markers and apoptosis. Results: The levels of intracellular adhesion molecule-1, vascular cellular adhesion molecule-1, and apoptosis in circulating epithelialcells were the highest in OS group and the lowest in NC group. These levels were all greater in IH group than in CH group,and were lower in OST group than in OS and OSN groups (all p<0.001). Conclusion: Synergistic effects of IH with cigarette smoke-induced emphysema produce a greater inflammatory status and endothelialapoptosis. OS-related inflammation and endothelial cell apoptosis may play important roles in promoting cardiovasculardysfunction, and antioxidant tempol could achieve a partial protective effect.

A new method based on LPP and NSGA-II for multiobjective robust collaborative optimization

Haiyan Li,Mingxu Ma,Yuanwei Jing 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.5

The multiobjective robust collaborative optimization framework consists of optimization both at the system and autonomous subsystem levels. Linear physical programming is used in the system level optimization, which avoids the difficulty in choosing the multidimensional Pareto set. The non-dominated sorting genetic algorithm (NSGA-II) is used in the subsystem optimization with physical objectives. The interdisciplinary incompatibility function and physical objectives have different priority levels. At the first priority level, the best individual should be in the feasible region of the subsystem. At the second priority level, the interdisciplinary incompatibility function of the best individual should be no more than the feasibility threshold. The physical objectives are improved after the achievement of the above levels. A method for producing initial population with feasibility and diversity is proposed to improve the calculation efficiency and accuracy of the subsystem optimization at the first priority level. A method for setting dynamic feasibility threshold is proposed for the non-dominated sorting to help the physical objectives to obtain better solutions at the second priority level. Finally,the results of the speed reducer show that the presented method is efficient.

Industries TFP and Environmental Regulation Cost Analysis Using Malmquist Luenberger

Haiyan Wang,Liting Shen,Chunlan Liu,Hui Han 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.2

Environmental problem is a worldwide focus, so is the effect of environmental regulation on economy. In this paper, we constructed a model including energy consumption and integrated pollutant emissions of "Three wastes" as "bad" output. This studyr used Malmquist –Luenberger based on directional distance function to measure TFP and environmental regulation cost of Chinese 36 industries from 2001 to 2010. The result was that: From the overall analysis, the TFP was lower after considering the environmental regulation. Technological progress was the main driver of productivity growth. Environmental regulation brought about a certain cost; from the industry analysis, Difference of TFP growth and the cost of environmental regulation existed among different industries. The monopoly and heavy industries were the focus in the industry; from the annual analysis, TFP increased during "Eleventh Five-Year Plan" period, mainly drived by technological progress.

Onychocytic Matricoma: Report of an Asian Case

( Haiyan Song ),( Fei Qu ),( Ningning Dang ),( Xuewu Sun ) 대한피부과학회 2017 Annals of Dermatology Vol.29 No.3