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Rare case of intussusception in an adult with acute myeloid leukemia

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World Journal of Gastroenterology 2015年第2期21卷 688-693页

作者： Man Fai Law Cheuk Kei Wong Chun Yin Pang Hay Nun Chan Ho Kei Lai Chung Yin Ha Celia Ng yiu ming Yeung Sze Fai Yip Department of Medicine Tuen Mun Hospital Department of Medicine and Therapeutics Prince of Wales Hospital Department of Radiology Kwong Wah Hospital Department of Pathology Tuen Mun Hospital

Intussusception is rarely reported in adult patients with acute leukemia. We report a case of intussusception in a 29-year-old woman with acute myeloid leukemia(AML). She developed right lower quadrant pain, fever, and vomiting on day 16 of induction *** examination showed tenderness and guarding at the right lower quadrant of the abdomen. Abdominal computed tomography(CT) showed distension of the cecum and ascending colon, which were filled with loops of small bowel, and herniation of the ileocecal valve into the cecum. We proceeded to laparotomy and revealed ileocecal intussusception with the ileocecal valve as the leading point. The terminal ileum was thickened and invaginated into the cecum, which showed gangrenous changes. Right hemicolectomy was performed and microscopic examination of the colonic tissue showed infiltration of leukemic cells. The patient recovered after the operation and was subsequently able to continue treatment for AML. This case demonstrates that the diagnosis of intussusception is difficult because the presenting symptoms can be non-specific, but abdominal CT can be informative for preoperative diagnosis. Resection of the involved bowel is recommended when malignancy is suspected or confirmed. Intussusception should be considered in any leukemia patients presenting with acute abdomen. A high index of clinical suspicion is important for early diagnosis.

关键词： Intussusception Acute leukemia Abdominal pain Colo

Spider Web‑Inspired Graphene Skeleton‑Based High Thermal Conductivity Phase Change Nanocomposites for Battery Thermal Management

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Nano-Micro Letters 2021年第11期13卷 308-321页

作者： Ying Lin Qi Kang Han Wei Hua Bao Pingkai Jiang yiu‑Wing Mai Xingyi Huang Shanghai Key Lab of Electrical Insulation and Thermal Ageing The State Key Laboratory of Metal Matrix CompositesDepartment of Polymer Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China University of Michigan‑Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronic Engineering J07The University of SydneySydneyNSW 2006Australia

Phase change materials(PCMs)can be used for efficient thermal energy harvesting,which has great potential for cost-effective thermal management and energy ***,the low intrinsic thermal conductivity of polymeric PCMs is a bottleneck for fast and efficient heat ***,it is also a challenge to achieve a high thermal conductivity for phase change nanocomposites at low filler *** constructing a three-dimensional(3D)thermally conductive network within PCMs can address these problems,the anisotropy of the 3D framework usually leads to poor thermal conductivity in the direction perpendicular to the alignment of *** by the interlaced structure of spider webs in nature,this study reports a new strategy for fabricating highly thermally conductive phase change composites(sw-GS/PW)with a 3D spider web(sw)-like structured graphene skeleton(GS)by hydrothermal reaction,radial freeze-casting and vacuum impregnation in paraffin wax(PW).The results show that the sw-GS hardly affected the phase transformation behavior of PW at low ***,sw-GS/PW exhibits both high cross-plane and in-plane thermal conductivity enhancements of~1260%and~840%,respectively,at an ultra-low filler loading of 2.25 vol.%.The thermal infrared results also demonstrate that sw-GS/PW possessed promising applications in battery thermal management.

关键词： Thermal conductivity Radial freeze-casting Phase change materials 3D graphene aerogel Thermal management

Single-pilot operations in commercial flight:Effects on neural activity and visual behaviour under abnormalities and emergencies

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Chinese Journal of Aeronautics 2024年第8期37卷 277-292页

作者： Qinbiao LI Chun-Hsien CHEN Kam K.H.NG Xin YUAN Cho Yin yiu Human Factors and Ergonomics Laboratory Department of Aeronautical and Aviation EngineeringThe Hong Kong Polytechnic UniversityHong Kong Special Administrative Region 100872China School of Mechanical&Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore

With cutting-edge technologies and considering airline human-resource-saving,a single pilot in commercial jets could be technically *** changes in captains’natural behaviours are initially required to comprehend the specific safe human performance envelope for safeguarding single-pilot flight,particularly in high-risk *** paper investigates how captains’performance transforms for fixing emergencies when operating from Dual-Pilot Operations(DPO)to Single-Pilot Operations(SPO)through a physiological-based *** pilots flew an emergency-included flight with/without first officers’*** neural activities and scanning behaviours were recorded using a 32-channel Electroencephalogram(EEG)and glasses-based eye tracker,with the observation and post-experiment questionnaires to evaluate the flight operations and pilots’*** alone,there was a significantly increased cortical activity in h and b waves over the frontal,parietal,and temporal lobes during the more complicated emergencies,and pilots focused less on the primary flight display while spending significantly more time scanning the other *** physiological fluctuating patterns associated with risky operations in SPO were highlighted by cross-correlating multimodal *** experimental-based noteworthy insights may wish to inform commercial SPO measures to lessen the persistent physiological fluctuation,assisting airlines in creating SPO-oriented intelligent flight systems to give captains adequate support for assuring safer air transportation.

关键词： Aviation engineering Single pilot operations Behaviour changes Eye tracker Electroencephalogram

Flexible,Highly Thermally Conductive and Electrically Insulating Phase Change Materials for Advanced Thermal Management of 5G Base Stations and Thermoelectric Generators

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Nano-Micro Letters 2023年第3期15卷 1-15页

作者： Ying Lin Qi Kang Yijie Liu Yingke Zhu Pingkai Jiang yiu‑Wing Mai Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing Department of Polymer Science and Engineeringthe State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronic Engineering J07The University of SydneySydneyNSW 2006Australia

Thermal management has become a crucial problem for high-power-density equipment and *** change materials(PCMs)have great prospects in thermal management applications because of their large capacity of heat storage and isothermal behavior during phase ***,low intrinsic thermal conductivity,ease of leakage,and lack of flexibility severely limit their *** one of these problems often comes at the expense of other performance of the *** this work,we report core–sheath structured phase change nanocomposites(PCNs)with an aligned and interconnected boron nitride nanosheet network by combining coaxial electrospinning,electrostatic spraying,and *** advanced PCN films exhibit an ultrahigh thermal conductivity of 28.3 W m^(-1)K^(-1)at a low BNNS loading(i.e.,32 wt%),which thereby endows the PCNs with high enthalpy(>101 J g^(-1)),outstanding ductility(>40%)and improved fire ***,our core–sheath strategies successfully balance the trade-off between thermal conductivity,flexibility,and phase change enthalpy of ***,the PCNs provide powerful cooling solutions on 5G base station chips and thermoelectric generators,displaying promising thermal management applications on high-power-density equipment and thermoelectric conversion devices.

关键词： Coaxial electrospinning Boron nitride nanosheets Phase change nanocomposites Thermal conductivity Thermal management

Differential CI^-and HCO_3^- mediated anion secretion by different colonic cell types in response to tetromethylpyrazine

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World Journal of Gastroenterology 2004年第12期10卷 1763-1768页

作者： Jin-XiaZhu NingYang QiongHe Lai-LingTsang Wen-ChaoZhao yiu-WaChung Hsiao-ChangChan EpithelialCellBiologyResearchCenter DepartmentofPhysiologyFacultyofMedicineTheChineseUniversityofHongKongShatinHongKongChina DepartmentofPhysiology MedicalSchoolZhengzhouUniversityZhengzhou450052HenanProvinceChina

AIM: Colonic epithelium is known to secrete both CI- and HCO3, but the secretory mechanisms of different colonic cell types are not fully understood. The present study aimed to investigate the differential activation of Cl-and HCO3 secretion by tetramethylpyrazine (TMP) in human crypt-like cell line, T84, and villus-like cell line, Caco-2, in comparison to the TMP-induced secretory response in freshly isolated rat colonic mucosa. METHODS: Colonic epithelial anion secretion was studied by using the short circuit current (Isc) technique. RT-PCR was used to examine the expression of Na^+-HCO3-cotranspoter in different epithelial cell types. RESULTS: TMP produced a concentration-dependent Isc which was increase in both T84 and Caco-2 cells. When extracellular CI was removed, TMP-induced Isc was abolished by 76.6% in T84 cells, but not in Caco-2 cells. However, after both CI and HCO3- were removed, TMP-induced Isc in Caco-2 cells was reduced to 10%. Bumetanide, an inhibitor of Na^+-K^+-Cl-cotranspoter, inhibited the TMP-induced Isc by 96.7% in T84 cells, but only 47.9% in Caco-2 cells. In the presence of bumetanide and 4, 4'-diisothiocyanostilbene-2, 2'-disulfonic acid, an inhibitor of Na^+-HCO3- cotransporter, inhibited the TMP-induced current in Caco-2 cells by 93.3% .In freshly isolated rat colonic mucosa, TMP stimulated distinct Isc responses similar to that observed in T84 and Caco-2 cells depending on the concentration used. RT-PCR revealed that the expression of Na^+-HCO3- cotransporter in Caco-2 cells was 4-fold more greater than that in T84 cells. CONCLUSION: TMP exerts concentration-dependent differential effects on different colonic cell types with stimulation of predominant Cl- secretion by crypt cells at a lower concentration, but predominant HCO3- secretion by villus cells at a higher concentration, suggesting different roles of these cells in colonic Cl and HCO3 secretion.

关键词： Cl^- HCO3^- 阴离子分泌物结肠细胞类型 TMP

Arsenic Accumulation in Rice:Sources,Human Health Impact and Probable Mitigation Approaches

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Rice science 2022年第4期29卷 309-327页

作者： Md ROKONUZZAMAN LI Wai Chin MAN Yu Bon TSANG yiu Fai YE Zhihong Department of Science and Environmental Studies the Education University of Hong KongHong Kong 999077China School of Life Sciences Sun Yat-Sen UniversityGuangzhou 510006China

The human body loading with arsenic(As)through rice consumption is a global health *** is a crucial need to limit As build-up in rice,either by remediating As accumulation in soils or reducing As levels in irrigation *** conventional approaches have been utilized to alleviate the As accumulation in ***,except for some irrigation practices,those approaches success and the adoption rate are not *** review presents human health risks posed due to consumption of As contaminated rice,evaluates different biomarkers for tracing As loading in the human body,and discusses the latest advancement in As reducing technologies emphasizing the application of seed priming,nanotechnology,and biochar application for limiting As loading in rice *** also evaluate different irrigation techniques to reduce As accumulation in *** water management regimes significantly reduces grain As ***-and nano-priming of rice seeds improve germination and minimize As translocation in rice tissues by protecting cell membrane,building pool around seed coat,methylation and volatilization,or quenching harmful effects of reactive oxygen *** application in the form of nano-adsorbents or nano-fertilizers facilitates nano-remediation of As through the formation of Fe plaque or sorption or oxidation *** biochar in the rice fields significantly reduces As through immobilization,physical adsorption,or surface *** conclusion,As content in cooked rice depends on irrigation source and raw rice As level.

关键词： arsenic rice scalp hair irrigation management seed priming nanotechnology biochar human health

Joint product numerical range and geometry of reduced density matrices

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Science China(Physics,Mechanics & Astronomy) 2017年第2期60卷 9-17页

作者： Jianxin Chen Cheng Guo Zhengfeng Ji yiu-Tung Poon Nengkun YU Bei Zeng Jie Zhou Joint Center for Quantum Information and Computer Science University of Maryland College Park 20740 USA Institute for Advanced Study Tsinghua University Beijing 100084 China Centre for Quantum Computation ＆ Intelligent Systems School of Software Faculty of Engineering and Information Technology University of Technology Sydney Sydney 2007 Australia State Key Laboratory of Computer Science.Institute of Software Chinese Academy of Sciences Beijing 100084 China Department of Mathematics Iowa State University Ames 50011-2140 USA Institute for Quantum Computing University of Waterloo Waterloo N2L 3G1 Canada Department of Mathematics ＆ Statistics University of Guelph Guelph N1G 2 W1 Canada Perimeter Institute for Theoretical Physics Waterloo N2L 2Y5 Canada

The reduced density matrices of a many-body quantum system form a convex set, whose three-dimensional projection is convex in R3. The boundary of may exhibit nontrivial geometry, in particular ruled surfaces. Two physical mechanisms are known for the origins of ruled surfaces： symmetry breaking and gapless. In this work, we study the emergence of ruled surfaces for systems with local Hamiltonians in infinite spatial dimension, where the reduced density matrices are known to be separable as a consequence of the quantum de Finetti＇s theorem. This allows us to identify the reduced density matrix geometry with joint product numerical range II of the Hamiltonian interaction terms. We focus on the case where the interaction terms have certain structures, such that a ruled surface emerges naturally when taking a convex hull of ∏. We show that, a ruled surface on sitting in ∏ has a gapless origin, otherwise it has a symmetry breaking origin. As an example, we demonstrate that a famous ruled surface, known as the oloid, is a possible shape of , with two boundary pieces of symmetry breaking origin separated by two gapless lines.

关键词： reduced density matrices quantum tomography numerical range quantum information oloid ruled surface

Responses of Soil Microbial Community Structure and Activity to Incorporation of Straws and Straw Biochars and Their Effects on Soil Respiration and Soil Organic Carbon Turnover

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Pedosphere 2019年第4期29卷 492-503页

作者： TIAN Xiaoping WANG Lei HOU Yahong WANG Han TSANG yiu Fai WU Jihua Key Laboratory of Yangtze River Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai 200092 (China) Research Institution for Shanghai Pollution Control and Ecological Security Shanghai 200092 (China) Department of Science and Environmental Studies The Education University of Hong Kong Hong Kong 999077 (China) Ministry of Education Key Laboratory for Biodiverstiy Science and Ecological Engineering School of Life Sciences Fudan University Shanghai 200433 (China)

Like straw, biochar incorporation can influence soil microorganisms and enzyme activities and soil carbon(C) responses;however,few studies have compared the various effects of straw and biochar and the underlying mechanisms. An experiment was performed to study the changes in soil respiration(SR) and soil organic C(SOC) fluxes in response to the incorporation of three kinds of straw(reed, smooth cordgrass, and rice) and their pyrolyzed products(biochars) at Chongming Island, China. In addition, the microbial activity and community structure of some amended soils were also analyzed to clarify the mechanisms of these responses. The results showed that all biochar incorporation(BC) induced lower SR than the corresponding unpyrolyzed straw incorporation(ST), and the average SR in the soils following BC and ST during the experimental periods was 21.69 and 65.32 μmol CO2 m^-2s^-1, ***, the average SOC content was 16.97 g kg-1 following BC, which was higher than that(13.71 g kg-1) following ST,indicating that compared to ST, BC was a low-C strategy, even after accounting for the C loss during biochar production. Among the BC treatments, reed-BC induced the lowest SR(17.04 μmol CO2 m^-2s^-1), whereas smooth cordgrass-BC induced the highest SR(27.02 μmol CO2 m^-2s^-1). Furthermore, in contrast with ST, BC significantly increased the abundance of some bacteria with poorer mineralization or better humification ability, which led to lower SR. The lower easily oxidizable C(EOC) and higher total C contents of biochars induced lower SR and higher SOC in the soil following BC compared to that following ST. Among the BC treatments,the higher total nitrogen content of rice biochar led to significantly higher soil microbial biomass, and the lower EOC content of reed biochar led to lower soil microbial activity and SR.

关键词： easily oxidizable carbon soil fertility soil microbial abundance soil microbial biomass soil microbial diversity soil organic carbon decomposition

Echocardiographic evaluation of right ventricular function in congenital heart disease

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Chinese Medical Journal 2014年第21期127卷 3789-3797页

作者： yiu-fai Cheung Division of Paediatric Cardiology Department of Paediatrics and Adolescent Medicine Queen Mary Hospital The University of Hong Kong Hong Kong China

Objective This review aims to provide an overview of conventional and novel indices used in clinical and research arenas for evaluation of right ventricular （RV） function in congenital heart diseases with a dual-chambered *** sources Articles cited in this review were selected using PubMed search of publications in English with no date *** search terms included ＂echocardiography＂,＂right ventricle＂,＂RV function＂,＂cardiac function＂,and ＂congenital heart disease＂.Key references were also searched for additional *** selection Articles related to description of echocardiographic techniques in the evaluation of subpulmonary or systemic RV function and their applications in congenital cardiac malformations were retrieved and *** Three approaches have been used to evaluate subpulmonary and systemic RV function：（1） assessment of changes in RV size in the cardiac cycle,（2） determination of Doppler-derived velocities and systolic and diastolic time intervals,and （3） quantification of myocardial velocities and *** Conventional and novel echocardiographic techniques enable the evaluation of subpulmonary and systemic RV *** echocardiographic techniques have further allowed quantification of RV volumes and direct interrogation of myocardial *** new techniques show promise in a more comprehensive evaluation beyond ＂eye-bailing＂ of RV function in the growing population of adolescent and adult congenital heart patients.

关键词： ventricular function congenital heart defects echocardiography