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recent advances in the diagnostic evaluation of pancreatic cystic lesions

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World Journal of Gastroenterology 2022年第6期28卷 624-634页

作者： devarshi r Ardeshna Troy Cao Brandon rodgers Chidiebere Onongaya dan Jones Wei Chen Eugene J Koay Somashekar G Krishna department of Internal Medicine Ohio State University Wexner Medical CenterColumbusOH 43210United States College of Medicine Ohio State UniversityColumbusOH 43210United States James Molecular Laboratory Ohio State University Wexner Medical CenterColumbusOH 43210United States department of Pathology Ohio State University Wexner Medical CenterColumbusOH 43210United States department of GI radiation Oncology The University of Texas MD AndersonHoustonTX77030United States division of Gastroenterology Department of Internal MedicineOhio State University Wexner Medical CenterColumbusOH 43210United States

Pancreatic cystic lesions(PCLs)are becoming more prevalent due to more frequent abdominal imaging and the increasing age of the general *** has become crucial to identify these PCLs and subsequently risk stratify them to guide *** the high morbidity associated with pancreatic surgery,only those PCLs at high risk for malignancy should undergo such ***,current diagnostic testing is suboptimal at accurately diagnosing and risk stratifying ***,research has focused on developing new techniques for differentiating mucinous from non-mucinous PCLs and identifying high risk lesions for *** sectional imaging radiomics can potentially improve the predictive accuracy of primary risk stratification of PCLs at the time of detection to guide invasive *** cyst fluid glucose has reemerged as a potential biomarker,cyst fluid molecular markers have improved accuracy for identifying specific types of *** ultrasound guided approaches such as confocal laser endomicroscopy and through the needle microforceps biopsy have shown a good correlation with histopathological findings and are evolving techniques for identifying and risk stratifying *** most of these recent diagnostics are only practiced at selective tertiary care centers,they hold a promise that management of PCLs will only get better in the future.

关键词： Pancreatic cystic lesion Intraductal papillary mucinous neoplasms Mucinous cystic neoplasm Microforceps biopsy radiomics Confocal laser endomicroscopy

Hydrogen-based direct reduction of iron oxide at 700℃:Heterogeneity at pellet and microstructure scales

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International Journal of Minerals,Metallurgy and Materials 2022年第10期29卷 1901-1907页

作者： Yan Ma Isnaldi r.Souza Filho Xue Zhang Supriya Nandy Pere Barriobero-Vila Guillermo requena dirk Vogel Michael rohwerder dirk Ponge Hauke Springer dierk raabe Max-Planck-Institut für Eisenforschung Max-Planck-Straße 140237 DüsseldorfGermany Corrosion Center Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Materials research German Aerospace Center(DLR)Linder Höhe51147 CologneGermany Lehr-und Forschungsgebiet Metallische Strukturen und Werkstoffsysteme für die Luft-und raumfahrt RWTH Aachen University52062 AachenGermany Institut für Bildsame Formgebung RWTH Aachen UniversityIntzestraße 1052072 AachenGermany

Steel production causes a third of all industrial CO_(2) emissions due to the use of carbon-based substances as reductants for iron ores,making it a key driver of global ***,research efforts aim to replace these reductants with sustainably produced ***-based direct reduction(Hydr)is an attractive processing technology,given that direct reduction(dr)furnaces are routinely operated in the steel industry but with CH_(4) or CO as *** diffuses considerably faster through shaft-furnace pellet agglomerates than carbon-based ***,the net reduction kinetics in Hydr remains extremely sluggish for high-quantity steel production,and the hydrogen consumption exceeds the stoichiometrically required amount ***,the present study focused on the improved understanding of the influence of spatial gradients,morphology,and internal microstructures of ore pellets on reduction efficiency and metallization during *** this purpose,commercial dr pellets were investigated using synchrotron high-energy X-ray diffraction and electron microscopy in conjunction with electron backscatter diffraction and chemical *** the interplay of different phases with internal interfaces,free surfaces,and associated nucleation and growth mechanisms provides a basis for developing tailored ore pellets that are highly suited for a fast and efficient Hydr.

关键词： hydrogen-based direct reduction iron oxide microstructure spatial gradient metallization

Properties and Metallurgical Aspects of Heavy Wall Q&T Line Pipe Steels

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Journal of Iron and Steel research(International) 2011年第S1期18卷 752-755页

作者： Eloy Martinez r SvMet Engineering S.APuebla Mexico

The production of Q&T line pipe steels for heavy wall pipe requires several properties to be fully *** them is the yield strength for strain based criteria pipelines for subsea *** strength must match the required minimum under elevated temperature conditions [60 & 160 ℃] and at the same time do not exceed the surface hardness that will make the welding *** of 220 vickers hardness has been set for some of the subsea *** in a busy Q&T line requires simple tools to predict the time and temperatures to achieve the desired *** classical strength and logarithm of time,after Bhadeshia [1],has been used with excellent results in these line pipe steels of different wall thickness.

关键词： bainite heavy wall wall thickness tempering temperature yield point toughness

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提取冶金单元过程

提取冶金单元过程

作者： r.d.·佩克(r.d. Pehlke)

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Animal cognition

Integrative Zoology 2019年第2期14卷 128-131页

作者： Susan d.HEALY School of Biology University of St AndrewsSt AndrewsFifeUK

This special issue of Integrative Zoology(the official journal of the International Society of Zoological Sciences and the Institute of Zoology,Chinese Academy of Sciences)is focused on questions concerning the cognitive abilities of *** papers in this issue are the outcome of the 9th International Symposium of Integrative Zoology from 27-31 August 2017 in Xining,Qinghai Province,*** of these papers showcases questions absorbing the current interest of researchers in animal cognition(Healy 2019).Those questions range from the methodological through to experimental design to the relationship between cognitive abilities and their neural underpinnings,from the laboratory to the field,and to the very nature of *** experimental design has long been the hallmark of work on animal cognition(many examples are included in Shettleworth[2010])and this special issue contains several new instances.

关键词： journal concerning cognition

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卟啉症的治疗及其作用机制

International Journal of dermatology And Venereology 1982年第4期8卷 214-217页

作者： Bickers d r 徐参

卟啉症是先天性或获得性血色素(H)合成酶功能异常所致的 H 合成失调性疾患。具有毒性的卟啉和卟啉前驱物是引起症状的主要因素,正常情况下,这些物质在体内含量极少,因而无害。理想的治疗方法是恢复酶的正常功能,从而使卟啉及其前驱物降... 详细信息

卟啉症是先天性或获得性血色素(H)合成酶功能异常所致的 H 合成失调性疾患。具有毒性的卟啉和卟啉前驱物是引起症状的主要因素,正常情况下,这些物质在体内含量极少,因而无害。理想的治疗方法是恢复酶的正常功能,从而使卟啉及其前驱物降至正常水平,可惜此种治疗目标还不能达到。目前有几种药物可影响 H 合成酶的活性,但无持久作用。动物体内每天制造多量 H,但中间产物的积存和排出甚微。H 的主要生成部位在肝脏和骨髓。骨髓 H 供应红细胞合成血红蛋白,

关键词： PCT 光过敏变态反应病叶琳症亚铁络合酶合成过程尿吓抗疟药抗原虫药放血术酶的活性

Laguerre reproducing kernel method in Hilbert spaces for unsteady stagnation point ow over a stretching/shrinking sheet

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Applied Mathematics(A Journal of Chinese Universities) 2021年第3期36卷 354-369页

作者： M.r.Foroutan A.S.Gholizadeh Sh.Najafzadeh r.H.Haghi department of Mathematics Payame Noor UniversityP O Box 19395-3697TehranIran

This paper investigates the nonlinear boundary value problem resulting from the exact reduction of the Navier-Stokes equations for unsteady magnetohydrodynamic boundary layer flow over the stretching/shrinking permeable sheet submerged in a moving *** solve this equation,a numerical method is proposed based on a Laguerre functions with reproducing kernel Hilbert space *** the operational matrices of derivative,we reduced the problem to a set of algebraic *** also compare this work with some other numerical results and present a solution that proves to be highly accurate.

关键词： nonlinear boundary value problem Laguerre reproducing kernel method operational matrix of derivative existence and nonexistence of solutions approximate solution

Tuning the particle size,physical properties,and photocatalytic activity of Ag_(3)PO_(4)materials by changing the Ag^(+)/PO_(4)^(3-)ratio

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Chinese Physics B 2023年第3期32卷 561-568页

作者： Hung N M Oanh L T M Chung d P Thang d V Mai V T Hang L T Minh N V Center for Nano Science and Technology Hanoi National University of Education136 Xuan Thuy RoadCau Giay DistrictHanoi 100000Vietnam department of Physics Hanoi National University of Education136 Xuan Thuy RoadCau Giay DistrictHanoi 100000Vietnam Hanoi University of Mining and Geology Duc Thang WardNorth Tu Liem DistrictHanoi 100000Vietnam Institute of Materials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoi 100000Vietnam Faculty of Basic Sciences Hanoi University of Natural Resources and Environment41 A Phu Dien RoadNorth Tu LiemHanoi 100000Vietnam

This study demonstrates the influence of the Ag^(+)/PO_(4)^(3-)ratio in precursor solution on the crystal structural formation,morphology,physical properties,and photocatalytic performance of a Ag_(3)PO_(4)photocatalyst that is fabricated,using a facile precipitation method,from AgNO_(3)and Na2HPO_(4)·12H_(2)*** material characterizations were carried out using x-ray diffraction(Xrd),scanning electron microscopy(SEM),energy-dispersive x-ray spectroscopy(EdX),Brunauer–Emmett–Teller(BET)surface area,Fourier transform infrared(FTIr)absorption,raman scattering,x-ray photoelectron spectroscopy(XPS),UV-vis absorption,and photoluminescence(PL).The results show that Ag_(3)PO_(4)crystallizes better when the excess PO_(4)^(3-)content increases,and the lattice parameters decrease slightly,while the crystal diameter and the particle size *** change is also observed in the raman scattering and FTIr spectra with the increase in the vibration frequency of the[PO_(4)]*** compression of the[PO_(4)]unit was also confirmed in the XPS spectra with the shift of P 2p peaks toward higher binding *** photocatalytic results showed that the samples synthesized from excess PO_(4)^(3-)solution exhibited higher photocatalytic performance compared to the sample with a Ag^(+)/PO_(4)^(3-)ratio of 3:1.A sample prepared from the precursor solution with a Ag^(+)/PO_(4)^(3-)ratio of 3:1.5 was optimal for rhB decomposition under both visible light and natural sunlight,completely decomposing 10 ppm rhB after 15 minutes of xenon lamp irradiation and after 60 minutes under solar light *** is attributed to the high crystallinity,small particle size and low electron–hole recombination rate of the sample.

关键词： morphology photocatalytic Ag^(+)/PO_(4)^(3-)ratio visible light