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- 저자 : Yanbin Hao (검색결과 4 건)
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Yanbin Yu,Hao Xing,Weimin Cheng,Wenting Cui,Ruoyu Mu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
To investigate the effect of acetic acid on the organic structure of coal, experimental studies and moleculardynamics simulations were used to jointly characterize the response mechanism of the organicstructure of coal to acetic acid. The functional groups of coal after the dissolution of different concentrationsof acetic acid were tested using Fourier infrared spectroscopy, and the results showed that: the sensitivityof functional groups in coal to different concentrations of acetic acid differs, and acetic acidmainly acts to break the linkage bonds between molecules and hydroxyl groups, producing a largeamount of –OH; high concentrations (100% and 75%) of acetic acid react with CH2 alkanes to producenew CH2 alkanes, but low concentrations (50% and 25%) acetic acid does not undergo this reaction. In thispaper, we model the solid–liquid system of coal-acetic acid reaction, simulate and characterize the reactionof bituminous coal organic structure to acetic acid, and find that: water molecules can help aceticacid molecules adsorb on the surface of coal molecules, but water molecules will occupy a large amountof space, thus affecting the adsorption of coal molecules. Most of the coal molecules have water moleculesand acetic acid molecules adsorbed on the benzene ring and oxygen-containing functional groupstructures, while the functional groups associated with aliphatic groups in coal molecules are difficultto adsorb due to their hydrophobicity.
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Ningguang Dong,Dong Pei,Ying Gao,Yanbin Hao,Weilun Yin 한국식물생명공학회 2014 Plant biotechnology reports Vol.8 No.5
Poplar 741 [Populus alba 9 (P. davidiana? P. simonii) 9 P. tomentosa] leaves were rootedwithin 8 days when cultured on 1/2 MS medium. Thesubcellular localization of endogenous indole-3-acetic acid(IAA) in the rhizogenesis was investigated, using animmunocytochemical approach. The results of IAA subcellularlocalization revealed organelle-specific distribution. Three days after root induction, IAA in vascularcambium cells of the basal region of the petiole was distributedmainly in the plasma membrane, endoplasmicreticulum (ER), and nucleus, with a lesser amount in thecytoplasm. In phloem of the basal region of the petiole,IAA was detected in the plasma membrane and ER of thecompanion cell and in the plasma membrane of the sieveelement. In xylem of the basal region of the petiole, no IAAgold particles were labeled. In mesophyll cells IAA wasdistributed in the chloroplast starch grains before rootinduction, and the amount in the chloroplast starch grainsincreased after 3 days after root induction. This suggeststhat the plasma membrane and nucleus of cambium cellsmay be the target sites where IAA performs its physiologicalactivities during poplar leaf rhizogenesis. IAA polartransport from lamina mesophyll to the basal region of thepetiole during rhizogenesis is mediated by phloem. Thestarch grains of mesophyll chloroplasts appeared to accumulateIAA and may be a source of IAA during poplar leafrhizogenesis. Novel and direct evidence regarding thefunction of IAA during rhizogenesis is provided in thisstudy.
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Li-xin Zhang,Jianxun Chen,Lijun Chen,Yanbin Luo,Weiwei Liu,Fangfang Dong,Hao Chen,Hao-yang Zhu 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.10
A high-performance grouting material is proposed to enhance the support effect of anchoring pipes in soft rock mass tunnels in this paper. Through mix proportion and strength tests, the initial setting time, compressive strength, and flowability of the grouting material were determined. Furthermore, based on grouting and pulling tests, the recommended parameters of the anchoringpipe were proposed. The results show that pure cement paste is an ideal grouting material for on-site application, demonstrating excellent anchoring, fluidity, high strength, and rapid hardening. Under optimal conditions of water-cement ratio at 0.46 and retarder proportion at 0.4‰, the initial settling time and the compressive strength of the grouting material are approximately 45 minutes and 28.5 MPa within 4 hours, respectively. The anchoring force of an anchoring pipe with a length of 6 m and a diameter of 76 mm can reach 448.9 kN within the same period. A field test involving anchoring pipes and pure cement paste was conducted during tunnel construction, resulting in a substantial reduction of maximum settlement and convergence of the tunnel by 57.53% and 40.48%, respectively. These results demonstrate the effectiveness
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