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| 1 | The effect of Fe-Mn minerals and seawater interface and enrich-ment mechanism of ore-forming elements of polymetallic crusts and nodules from the South China Sea显示文摘Ferromanganese crusts and nodules are important submarine mineral resources that contain various metal elements with significant economic value. In this study, polymetallic crusts and nodules obtained from the South China Sea(SCS) were determined by using X-ray power diffraction(XRD), Raman spectroscopy(RS), Fourier transform infrared spectroscopy(FTIR), and X-ray photoelectron spectroscopy(XPS) to systematically investigate and analyze the mineralogical and spectral characteristics of the Fe-Mn minerals. XRD measurements revealed that the SCS polymetallic crusts and nodules were composed of vernadite, quartz, and plagioclase. The nodules also contained todorokite. The Fe-phase minerals of the SCS crusts and nodules were composed of amorphous Fe oxide/hydroxide, and the Mn-and Fe-phases minerals exhibited relatively poor degrees of crystallization. FTIR results showed that the Fe-Mn minerals in the crusts and nodules included a large number of surface hydroxyl groups. These surface hydroxyl groups contained protons that could provide reactive sites for complexation of ore-forming elements in seawater. XPS results indicated that the surfaces of the Fe-Mn minerals mainly contained Fe, Mn, and O. Fe was present in the trivalent oxidation state, while Mn, which may contain several bivalent oxidation state, was present in the tetravalent and trivalent oxidation states. The SCS polymetallic crusts and nodules were compared with Pacific seamount crusts, and results showed that the surface hydroxyl(-OH) groups of the SCS crusts and nodules numbered more than the lattice oxygen(O^(2-)). But the lattice oxygen of Pacific seamount crusts numbered more than the surface hydroxyl groups. This characteristic indicated that the degree of crystallization of Fe-Mn minerals from the Pacific Ocean was higher than that of minerals from the South China Sea. Comprehensive studies showed that ore-forming elements in the interface between seawater and the Fe-Mn minerals in the submarine ferromanganese crusts and nodules employed the following enrichment mechanisms:(1) the metal ion complexed with the surface hydroxyl of Fe-Mn minerals to form hydroxyl complexes, which were connected by coordination bonds or stable inner-sphere complexes that exchanged protons on the mineral surfaces;(2) the charged surfaces of the minerals and metal cations formed outer-sphere complexes, which made up the electrostatic double layer, through electrostatic adsorption; and(3) the metal cations isomorphously exchanged the Mn and Fe ions of the mineral lattice structure. | GUAN Yao SUN Xiaoming IANG Xiaodong SA Rina ZHOU Li HUANG Yi LIU Yating LI Xiaojie LU Rongfei WANG Chi | 2017 | Acta Oceanologica Sinica2017，36，6： | 4 |
| 2 | Pd/TiO2 Nanospheres with Three-dimensional Hyperstructure for Enhanced Photodegradation of Organic Dye显示文摘Pd/TiO2 nanospheres assembled from nanorods with three-dimensional hyperstructure for enlianced photodegradation of organic dye was prepared by a sample solvothemial method. Further, it was used for degradation of methyl orange(MO) under the illumination of visible-light(simulated).The results show that Pd/TiO2 with 2%(mass fraction) Pd exhibits the noticeable activity in photodegrading of MO.The detailed analysis shows that this enhancement is attributed to the reduction of the rate of electron-hole recombination and surface plasmon resonance of Pd. The high activity and good stability of the obtained Pd/TiO2 nano spheres make it a promising photocatalyst for solving the environmental pollution problems. | WANG Huan XIAO Liguang WANG Chao LIN Bin LYU Sa CHU Xuefeng CHI Yaodan YANG Xiaotian WANG Xinyan | 2019 | Chemical Research in Chinese Universities2019，35，4： | 1 |
| 3 | Recurrent cervical esophageal stenosis after colon conduit failure:Use of myocutaneous flap显示文摘A 53-year-old male developed cervical esophageal stenosis after esophageal bypass surgery using a right colon conduit.The esophageal bypass surgery was performed to treat multiple esophageal strictures resulting from corrosive ingestion three years prior to presentation.Although the patient underwent several endoscopic stricture dilatations after surgery,he continued to suffer from recurrent esophageal stenosis.We planned cervical patch esophagoplasty with a pedicled skin flap of sternocleidomastoid(SCM) muscle.Postoperative recovery was successful,and the patient could eat a solid meal without difficulty and has been well for 18 mo.SCM flap esophagoplasty is an easier and safer method of managing complicated and recurrent cervical esophageal strictures than other operations. | Young Jo Sa Young Du Kim Chi Kyung Kim Jong Kyung Park Seok Whan Moon | 2013 | World Journal of Gastroenterology2013，19，2： | 1 |
| 4 | UV Resonance Raman Determination of Protein Acid Denaturation:Selective Unfolding of Helical Segments of Horse Myoglobin显示文摘 | Chi ZH Asher SA | | 0，，37： | 1 |
| 5 | Application of nursing diagnoses,inter- ventions, and outcomes to patients undergoing abdominal surgery in Korea 显示文摘 | Yom YH Chi SA Yoo HS | 2002 | Int J Nurs Terminol Classif2002，13，3： | 1 |
| 6 | Dimethyl fumarate,an immune modulator and inducer of the antioxidant response,suppresses HIV replication and macrophage-mediated neurotoxicity:a novel candidate for HIV neuroprotection显示文摘 | Cross SA Cook DR Chi AW | 2011 | J Immunol2011，187，10： | 1 |
| 7 | A regulated delivery system for inner ear drug application显示文摘 | Lajud SA Han Z Chi FL | 2013 | J Control Release2013，166，3： | 1 |
| 8 | Control of regulatory T cell development by The t ranscription factor Foxp3显示文摘 | HORI S NOMURA T SA KA GU CHI S | 2003 | Science2003，299，： | 1 |
| 9 | Predictive DNA testing and prophylactic thyroidectomy in patients at risk for multiple endocrine neoplasia type 2A 显示文摘 | Wells SA Chi DD Toshima K | 1994 | Ann Surg1994，220，： | 1 |
| 10 | Predictive DNA tesring and prophylactic thyroidectomy in patients at risk tor multiple endocrine neoplasia type 2A 显示文摘 | Wells SA Jr Chi DD Toshima K | 1994 | Ann Surg1994，220，3： | 1 |
| 11 | Inhibition of GM-CSF production in fibroblast-monocyte coculture by prednisone and effects of rhGM-CSF on human lung fibroblasts显示文摘 | Fitzgerald SM Chi DS Lee SA | 2004 | Front Biosci2004，9，： | 1 |
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