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Modeling the Migration of Soluble Methanol in Unsaturated Soil Zone

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Pedosphere 2007年第3期17卷 366-372页

作者： li hong li xin-Gang HUANG Guo-Qiang JIANG Bin School of Chemical Engineering and Technology Tianjin University Tianjin 300072 （China） National Engineering Research Center for Distillation Technology Tianjin 300072 （China）

A combined model of solute transport and water flow was developed to simulate the migration of methanol, a soluble organic chemical, in unsaturated soil zone. The solute transport equation considered convective-dispersive transport in the liquid phase as well as diffusion in the gas phase. The effect of rainfall and evapotranspiration on transport was considered at the boundary conditions of the governing equations. Data on the characteristics of a loam soil and the climatic conditions in southern California were also introduced to compare the results with those from a study in the USA in which the profiles of methanol distribution and water content in the soil zone at different times had been depicted. This comparison showed that there was good agreement between the two studies. The results showed that methanol contamination reached a depth of about 250 cm after 8 760 h. In contrast, if rainfall and evapotranspiration were not considered, the depth was only about 140 cm. The model therefore confirmed that rainfall strongly affected solute transport.

关键词： evapotranspiration methanol rainfall solute transport model

Performance of Ti6Al4V fabricated by electron beam and laser hybrid preheating and selective melting strategy

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China Foundry 2021年第4期18卷 351-359页

作者： Mo-han Hao Lei Zhang Bin Zhou hong-xin li Ming-zhi li Feng lin Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China

Electron beam selective melting(EBM)and selective laser melting(SLM)are regarded as significant manufacturing processes for near-net-shaped Ti6Al4V ***,in the conventional EBM process,preheating is necessitated to avoid"smoke"caused by the charging of *** the conventional SLM process,laser as an energy source without the risk of"smoke"can be employed to melt metal powder at low ***,because of the low absorption rate of laser,the powder bed temperature cannot reach a high *** is difficult to obtain as-built TiAl4V with favorable comprehensive properties via conventional EBM or ***,two types of electron beam and laser hybrid preheating(EB-LHP)combined with selective melting strategies are *** laser to preheat powder allows EBM to be performed at a low powder bed temperature(EBM-LT),whereas using an electron beam to preheat powder allows SLM to be performed at a high powder bed temperature(SLM-HT).Ti6Al4V samples are fabricated using two different manufacturing strategies(i.e.,EBM-LT and SLM-HT)and two conventional processes,i.e.,EBM at a high powder bed temperature(EBM-HT)and SLM at a low powder bed temperature(SLM-LT).The temperature-dependent surface quality,microstructure,density,and mechanical properties of the as-built Ti6Al4V samples are characterized and *** show that EBM-LT Ti6Al4V exhibits a higher ultimate tensile strength(981±43 MPa)and a lower elongation(12.2%±2.3%)than EBM-HT Ti6Al4V owing to the presence ofα′*** SLM-HT Ti6Al4V possesses the highest ultimate tensile strength(1,059±62 MPa)and an elongation(14.8%±4.0%)comparable to that of the EBM-HT Ti6Al4V(16.6%±1.2%).

关键词： Ti6Al4V electron beam selective melting selective laser melting hybrid preheating

Examination of wind-wave interaction source term in WAVEWATCH Ⅲ with tropical cyclone wind forcing

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Acta Oceanologica Sinica 2011年第4期30卷 1-13页

作者： ZHAO Wei GUAN Shoude hong xin li Peiliang TIAN Jiwei Physical Oceanography Laboratory Ocean University of China Qingdao 266100 China

Results of drag coefficient（CD） from field observations and laboratory wave tank experiments indicate that the operational wave model can overestimate wind energy input under high wind conditions. The wind-wave interaction source term in WAVEWATCH Ⅲ has been modified to examine its behavior with tropical cyclone wind forcing. Using high resolution wind input,numerical experiments under idealized wind field and tropical cyclone Bonnie（1998） were designed to evaluate performance of the modified models. Both experiments indicate that the modified models with reduced CD significantly decrease wind energy input into the wave model and then simulate lower significant wave height（SWH） than the original model. However,the effects on spatial distribution of SWH,mean wavelength,mean wave direction,and directional wave spectra are insignificant. Due to the reduced wind energy input,the idealized experiment shows that the modified models simulate lower SWH than the original model in all four quadrants. The decrease in the front quadrants is significantly larger than that in the rear quadrants;it is larger under higher winds than lower winds. The realistic experiment on tropical cyclone Bonnie shows that the modified model with the various downward trends of CD in high winds creates a simulation that agrees best with scanning radar altimeter observations.

关键词： drag coefficient wind-wave interaction tropical cyclone WAVEWATCH Ⅲ

A New Approach to [60]Fullerene Ferrocenyl Derivative

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Chinese Chemical Letters 2000年第9期11卷 775-776页

作者： Yuan Yin CHEN xin hong li College of Chemistry and Environmental Science, Wuhan University, Wuhan 430072 Wuhan Univ Coll Chem & Environm Sci Wuhan 430072 Peoples R China

A new approach to fullerene ferrocenyl derivative has been made. [60]Fullerene reacts with ferrocenylmethyl azide to give N-ferrocenylmethyl imino[60]fullerene in 42% yield.

关键词： C-60 ferrocenyl azide synthesis

Humanβ-defensin-1 affects the mammalian target of rapamycin pathway and autophagy in colon cancer cells through long noncoding RNA TCONS_00014506

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1465-1478页

作者： Yu-xin Zhao Yan Cui xin-hong li Wen-hong Yang Shi-Xiang An Jia-Xian Cui Min-Yu Zhang Jing-Kun Lu Xuan Zhang Xiu-Mei Wang li-li Bao Peng-Wei Zhao Department of Anesthesiology Inner Mongolia Chest HospitalThe Fourth HospitalHohhot 010035Inner Mongolia Autonomous RegionChina College of Humanities and Education Inner Mongolia Medical UniversityHohhot 010059Inner Mongolia Autonomous RegionChina Department of Radiotherapy The Affiliated Hospital of Inner Mongolia Medical UniversityHohhot 010059Inner Mongolia Autonomous RegionChina School of Basic Medical Science Inner Mongolia Medical UniversityHohhot 010059Inner Mongolia Autonomous RegionChina Department of Medical Oncology The Affiliated Cancer Hospital of Inner Mongolia Medical UniversityHohhot 010050Inner Mongolia Autonomous RegionChina

BACKGROUND Colorectal cancer has a low 5-year survival rate and high ***β-defensin-1(hBD-1)may play an integral function in the innate immune system,contributing to the recognition and destruction of cancer *** non-coding RNAs(lncRNAs)are involved in the process of cell differentiation and *** To investigate the effect of hBD-1 on the mammalian target of rapamycin(mTOR)pathway and autophagy in human colon cancer SW620 *** CCK8 assay was utilized for the detection of cell proliferation and determination of the optimal drug *** formation assay was employed to assess the effect of hBD-1 on SW620 cell *** was used to screen potentially biologically significant lncRNAs related to the mTOR ***,p-mTOR(Ser2448),Beclin1,and LC3II/I expression levels in SW620 cells were assessed through Western blot *** hBD-1 inhibited the proliferative ability of SW620 cells,as evidenced by the reduction in the colony formation capacity of SW620 cells upon exposure to ***-1 decreased the expression of p-mTOR(Ser2448)protein and increased the expression of Beclin1 and LC3II/I ***,bioinformatics analysis identified seven lncRNAs(2 upregulated and 5 downregulated)related to the mTOR *** lncRNA TCONS_00014506 was ultimately *** the inhibition of the lncRNA TCONS_00014506,exposure to hBD-1 inhibited p-mTOR(Ser2448)and promoted Beclin1 and LC3II/I protein *** hBD-1 inhibits the mTOR pathway and promotes autophagy by upregulating the expression of the lncRNA TCONS_00014506 in SW620 cells.

关键词： Colon cancer Humanβ-defensin-1 LncRNA Mammalian target of rapamycin Autophagy

Adenine-mediated amide-containing metal-organic framework toward one-step ethylene purification from a ternary mixture

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Chinese Journal of Structural Chemistry 2023年第2期42卷 1-4页

作者： Fang-Jing Guo Ning Yang hong-xin li Han Fang Dong-Xu Xue Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationXi'an Key Laboratory of Organometallic Material ChemistrySchool of Chemistry&Chemical EngineeringShaanxi Normal UniversityXi'an710062China

*** Ethylene is one of the most important raw materials in petrochemical *** to its specified synthesis process via steam cracking and thermal decomposition of either naphtha or ethane,acetylene and ethane are inevita... 详细信息

关键词： ethane ternary specified

Resting-state network complexity and magnitude changes in neonates with severe hypoxic ischemic encephalopathy

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Neural Regeneration Research 2019年第4期14卷 642-648页

作者： hong-xin li Min Yu Ai-Bin Zheng Qin-Fen Zhang Guo-Wei Hua Wen-Juan Tu li-Chi Zhang Department of Neonatology Changzhou Children's Hospital Nantong University Department of Children's Health Research Center Changzhou Children's Hospital Institute for Medical Imaging Technology School of Biomedical Engineering Shanghai Jiao Tong University Department of Radiology and BRIC University of North Carolina at Chapel Hill

Resting-state functional magnetic resonance imaging has revealed disrupted brain network connectivity in adults and teenagers with cerebral palsy. However, the specific brain networks implicated in neonatal cases remain poorly understood. In this study, we recruited 14 termborn infants with mild hypoxic ischemic encephalopathy and 14 term-born infants with severe hypoxic ischemic encephalopathy from Changzhou Children's Hospital, China. Resting-state functional magnetic resonance imaging data showed efficient small-world organization in whole-brain networks in both the mild and severe hypoxic ischemic encephalopathy groups. However, compared with the mild hypoxic ischemic encephalopathy group, the severe hypoxic ischemic encephalopathy group exhibited decreased local efficiency and a low clustering coefficient. The distribution of hub regions in the functional networks had fewer nodes in the severe hypoxic ischemic encephalopathy group compared with the mild hypoxic ischemic encephalopathy group. Moreover, nodal efficiency was reduced in the left rolandic operculum, left supramarginal gyrus, bilateral superior temporal gyrus, and right middle temporal gyrus. These results suggest that the topological structure of the resting state functional network in children with severe hypoxic ischemic encephalopathy is clearly distinct from that in children with mild hypoxic ischemic encephalopathy, and may be associated with impaired language, motion, and cognition. These data indicate that it may be possible to make early predictions regarding brain development in children with severe hypoxic ischemic encephalopathy, enabling early interventions targeting brain function. This study was approved by the Regional Ethics Review Boards of the Changzhou Children's Hospital(approval No. 2013-001) on January 31, 2013. Informed consent was obtained from the family members of the children. The trial was registered with the Chinese Clinical Trial Registry(registration number: ChiCTR1800

关键词： nerve regeneration neonates hypoxic ischemic encephalopathy resting-state functional magnetic resonance imaging brain networks small-world organization brain functional connectivity local efficiency clustering coefficient neural regeneration

SOliD CYSTIC PAPILLARY TUMOR OF PANCREAS IN EIGHT CHILDREN

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Chinese Medical Sciences Journal 2007年第1期22卷 54-57页

作者： Ke-ren Zhang Hui-min Jia hong Shu xin-yuan li Department of Pediatric Surgery the Second Affiliated Hospital China Medical University Shenyang 110004

Objective To estimate the clinical and pathological features of pancreatic solid cystic papillary tumor (SCPT) in children. Methods From 2000 to 2005, 8 cases with SCPT of the pancreas were analyzed retrospectively. All cases but one were females. Average age was 12.8 years. By case review, we discussed the clinical and pathological features of SCPT in children. Results The chief complains were abdominal pain and palpable mass. There were 3 cases in the head, 1 case in the body, and 4 cases in the tail of pancreas. The procedures employed included local resection (1 case), distal pancreatectomy (5 cases), pancreaticoduodenectomy (1 case), and biopsy (1 case). Histological examination showed solid with cystic areas and papillary protrusions in the 8 cases; as for immunohistochemical examinations, the positive rate was 100% for α-antitrypsin (AACT), 87.5% for vinmentin, and 62.5% for neuron-specific enolase (NSE). The patients were followed up for 2 months to 4 years but one was lost by follow-up and all were alive postoperatively. SCPT in 2 cases relapsed. Conclusion Occurring predominantly in young females, SCPT is usually curable by surgical resection with a favorable prognosis.

关键词： pancreatic neoplasms pathology therapy prognosis children

Study on Microcavity Organic light-emitting Devices Containing Negative Refractive Index Dielectric Layer

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Semiconductor Photonics and Technology 2009年第3期15卷 153-157页

作者： CAI hong-xin li li-xin School of Physics and Chemistry Henan Polytechnic University Jiaozuo 454000 CHN

A new structure containing negative refractive index dielectric layer（NRlDL） is introduced into microcavity. The properties of the new mierocavity organic light-emitting devices（MOLEDs） are investigated. In the experiment, the transfer matrix method is adopted. The dependence of reflectance and transmittance on the refractive index and thickness of NRIDL are analyzed in detail. Compared with the electroluminescence spectra of non-NRIDL diodes, the line widths of the spectra of the MOLEDs are narrower and all the peaks enhance. The results show that the new structure is beneficial to improve the performance and reduce the thickness of microcavity devices.

关键词： microcavity organic light-emitting device electroluminescence(EL) spectra negative refractive index dielectric layer