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Combination of cold drawing and cryogenic turning for modifying surface morphology of metastable austenitic AISI 347 steel

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Journal of Iron and Steel Research International 2019年第11期26卷 1188-1198页

作者： Hendrik Hotz Benjamin Kirsch steven becker Ralf Miiller Jan CAurich Institute for Manufacturing Technology and Production Systems University of Kaiserslautern67663 KaiserslauternGermany Institute of Applied Mechanics University of Kaiserslautern67663 KaiserslauternGermany

The application of components often depends to a large extent on the properties of the surface layer.A novel process chain for the production of components with a hardened surface layer from metastable austenitic steel was *** investigated metastable austenitic AISI 347 steel was cold-drawn in solution annealed condition at cryogenic temperatures for pre-hardening,followed by post-hardening via cryogenic *** increase in hardness in both processes was due to strain hardening and deformation-induced phase transformation from y-austenite to^-*** turning experiments were carried out with solution annealed AISI 347 steel as well as with solution annealed and subsequently cold-drawn AISI 347 *** thermomechanical load of the workpiece surface layer during the turning process as well as the resulting surface morphology was *** forces and temperatures were higher in turning the cold-drawn AISI 347 steel than turning the solution annealed AISI 347 *** cryogenic turning of the solution annealed material,deformation-induced phase transformation and a significant increase in hardness were detected in the near-surface *** contrast,no additional phase transformation was observed after cryogenic turning of the cold-drawn AISI 347 *** maximum hardness in the surface layer was similar,whereas the hardness in the core of the cold-drawn AISI 347 steel was higher compared to that in the solution annealed AISI 347 steel.

关键词： Surface layer hardening Cryogenic turning Cold drawing Metastable austenitic steel Deformation-induced phase transformation

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Condensation of pyrylium salts with mixed anhydrides:aryl ethers,aryl amines and sterically congested aromatics

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Organic Chemistry Frontiers 2022年第2期9卷 294-298页

作者： Daniel Grabowski Susanne Alef steven becker Ute Muller Gregor Schnakenburg Sigurd Hoger aKekulé-Institut für Organische Chemie und Biochemie Rheinische Friedrich-Wilhelms-Universität BonnGerhard-Domagk-Str.153121 BonnGermany bInstitut für Anorganische Chemie Universität BonnGerhard-Domagk-Str.153121 BonnGermany

The condensation of easily accessible and widely functionalizable 2,4,6-triaryl pyrylium salts with mixed anhydrides,formed in situ fromα-functionalized sodium acetates and an anhydride solvent,leads in good yields to the corresponding 2,4,6-triaryl benzenes functionalized at their 1-position.4-(Trifluoromethyl)benzoic anhydride has been proven as being the solvent of choice and ortho-disubstituted diphenyl ethers,triphenyl amines and phenyl carbazoles with different functionalizations are *** addition,sterically hindered anthracene diacetate is condensed with two bis-bromophenyl pyrylium salts which leads after intramolecular Yamamoto coupling to *** these,the anthracene core is surrounded by phenylenes and protected from photooxidation,leading to a highly stable blue emitting material.

关键词： material. anhydride salts

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Hepatocellular carcinoma after Iocoregional therapy:Magnetic resonance imaging findings in falsely negative exams

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World Journal of Hepatology 2016年第16期8卷 685-690页

作者： David becker-Weidman Jesse M Civan Sandeep P Deshmukh Christopher G Roth steven K Herrine Laurence Parker Donald G Mitchell Department of Radiology Thomas Jefferson University Division of Gastroenterology and Hepatology Department of MedicineThomas Jefferson University

AIM:To elucidate causes for false negative magnetic resonance imaging(MRI)exams by identifying imaging characteristics that predict viable hepatocellular carcinoma(HCC)in lesions previously treated with locoregional therapy when obvious findings of recurrence are ***:This retrospective institutional review board-approved and Health Insurance Portability and Accountability Act-compliant study included patients who underwent liver transplantation at our center between 1/1/2000 and 12/31/2012 after being treated for HCC with locoregional *** selected patients had a contrast-enhanced MRI after locoregional therapy within 90 d of transplant that was prospectively interpreted as without evidence of residual or ***,2 radiologists,blinded to clinica and pathological data,independently reviewed the pre transplant MRIs for 7 imaging *** explan histopathology provided the reference standard,with clinically significant tumor defined as viable tumor≥1.0cm in maximum ***’s exact test was firs performed to identify significant imaging ***:Inclusion criteria selected for 42 patients with 65 treated *** of 42 patients(33%and 16 of 65 treated lesions(25%)had clinically significant viable tumor on explant *** o the 7 imaging findings examined could reliably and reproducibly determine which treated lesion had viable tumor when the exam had been prospectively read as without evidence of viable ***:After locoregional therapy some treated lesions that do not demonstrate any MRI evidence o HCC will contain viable *** such even patients with a negative MRI following treatment should receive regular short-term imaging surveillance because some have occult viable *** possibility of occult tumo should be a consideration when contemplating any action which might delay liver transplant.

关键词： Hepatocellular carcinoma Transarterial chemoembolization Tumor recurrence Locoregional therapy Imaging surveillance

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Pregnancy and inflammatory bowel diseases: Current perspectives, risks and patient management

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World Journal of Gastrointestinal Pharmacology and Therapeutics 2015年第4期6卷 156-171页

作者： Pegah Hosseini-Carroll Monica Mutyala Abhishek Seth Shaheen Nageeb Demiana Soliman Moheb Boktor Ankur Sheth Jonathon Chapman James Morris Paul Jordan Kenneth Manas Felix becker Jonathan steven Alexander Department of Medicine Section of Gastroenterology and Hepatology Louisiana State University Health Sciences Center Department of Molecular and Cellular Physiology Louisiana State University Health Sciences Center Digestive Health Center of Louisiana Department of General and Visceral Surgery

Inflammatory bowel diseases(IBD) are chronic idiopathic inflammatory conditions characterized by relapsing and remitting episodes of inflammation which can affect several different regions of the gastrointestinal tract, but also shows extra-intestinal manifestations. IBD is most frequently diagnosed during peak female reproductive years, with 25% of women with IBD conceiving after their diagnosis. While IBD therapy has improved dramatically with enhanced surveillance and more abundant and powerful treatment options, IBD disease can have important effects on pregnancy and presents several challenges for maintaining optimal outcomes for mothers with IBD and the developing fetus/neonate. Women with IBD, the medical team treating them(both gastroenterologists and obstetricians/gynecologists) must often make highly complicated choices regarding conception, pregnancy, and post-natal care(particularly breastfeeding) related to their choice of treatment options at different phases of pregnancy as well as post-partum. This current review discusses current concerns and recommendations for pregnancy duringIBD and is intended for gastroenterologists, general practitioners and IBD patients intending to become,(or already) pregnant, and their families. We have addressed patterns of IBD inheritance, effects of IBD on fertility and conception(in both men and women), the effects of IBD disease activity on maintenance of pregnancy and outcomes, risks of diagnostic procedures during pregnancy and potential risks and complications associated with different classes of IBD therapeutics. We also have evaluated the clinical experience using "top-down" care with biologics, which is currently the standard care at our institution. Post-partum care and breastfeeding recommendations are also addressed.

关键词： Inflammatory bowel diseases Pregnancy Biologics Br

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自发性脑出血治疗指南美国心脏协会／美国卒中协会对医疗卫生专业人员发布的指南

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国际脑血管病杂志 2010年第8期18卷 561-580页

作者： Lewis B. Morgenstem J. Claude Hemphill Ⅲ Craig Anderson Kyra becker Joseph P. Broderick E. Sander Connolly Jr steven M. Greenberg James N. Huang R. Loch Macdonald steven R. Messe Pamela H. Mitchell Magdy Selim Rafael J. Tamargo 王玉洁(译) 王健(译) 刘相玉(译) 谢丽丽(译) 美国心脏协会卒中委员会和心血管护理委员会辽宁省人民医院神经内二科沈阳110016

目的本指南旨在为急性自发性脑出血的诊断和治疗提供最新的综合性推荐意见。方法通过Medline进行规范的文献检索，利用证据表合并资料。撰写委员会成员通过远程电信会议讨论根据资料得出的推荐意见。采用美国心脏协会卒中委员会的证据... 详细信息

目的本指南旨在为急性自发性脑出血的诊断和治疗提供最新的综合性推荐意见。方法通过Medline进行规范的文献检索，利用证据表合并资料。撰写委员会成员通过远程电信会议讨论根据资料得出的推荐意见。采用美国心脏协会卒中委员会的证据分级方案对推荐意见进行分级。由6位同行评议专家以及卒中委员会科学声明监督委员会和卒中委员会领导委员会成员对指南的草案进行发表前审阅。预期本指南在3年内完全更新。结果本文为脑出血患者的医疗诊治提供了循证指南。重点包括诊断、止血、血压管理、院内管理和护理、预防内科合并症、外科治疗、转归预测、康复、预防复发以及将来需要考虑的问题。结论脑出血是一种严重的疾病，早期积极救治可影响其转归。本指南为脑出血患者的目标导向治疗提供了一个框架。

关键词：美国心脏协会科学声明脑出血治疗诊断颅内压脑积水外科

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用以局部治疗青光眼的碳酸酐酶抑制剂

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眼科新进展 1992年第3期 63-64页

作者： steven M.PODOS JANET B.SERLE 秦虹潍坊市人民医院眼科

becker B.于1954年首次报道了口服500mg至100mg碳酸酐酶抑制剂醋氮酰胺能有效地降低人眼内压。一年后,Green和Leopold发现结膜下注射醋氮酰胺并不能降低家兔的眼内压。此后开始了时起时伏、长达35年的寻找局部用碳酸酐酶抑制剂的历程。... 详细信息

becker B.于1954年首次报道了口服500mg至100mg碳酸酐酶抑制剂醋氮酰胺能有效地降低人眼内压。一年后,Green和Leopold发现结膜下注射醋氮酰胺并不能降低家兔的眼内压。此后开始了时起时伏、长达35年的寻找局部用碳酸酐酶抑制剂的历程。这项工作的完成主要应归功于弗罗里达州立大学的Thomas Maren。

关键词：青光眼碳酸酶抑制剂碳化合物眼内压眼压

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解磷青霉菌的筛选及其对农作物和牧草的增产作用(英文)

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山东科学 2005年第3期18卷 78-84页

作者： steven A. WAKELIN Maarten H. RYDER Paul H. HARVEY Rosemary A. WARREN Simon T. ANSTIS CSIRO Land and Water PMB 2 Glen Osmond South Australia 5064 AustraliaCSIRO Land and Water PMB 2 Glen Osmond South Australia 5064 AustraliaCSIRO Land and Water PMB 2 Glen Osmond South Australia 5064 AustraliaCSIRO Land and Water PMB 2 Glen Osmond South Australia 5064 AustraliaSARDI GPO Box 397 Adelaide 5001 South Australia

青霉菌是大多数土壤微生物群体中的成员。许多青霉菌具有生物防治功能、分解土壤矿物功能(包括解磷作用)以及能够分泌植物生长刺激物质。研究利用这些真菌来增加作物产量由此受到注意。本文介绍从土壤中分离、鉴定青霉菌、青霉菌的解磷... 详细信息

青霉菌是大多数土壤微生物群体中的成员。许多青霉菌具有生物防治功能、分解土壤矿物功能(包括解磷作用)以及能够分泌植物生长刺激物质。研究利用这些真菌来增加作物产量由此受到注意。本文介绍从土壤中分离、鉴定青霉菌、青霉菌的解磷作用以及对植物生长的刺激作用的研究方法以及策略。从澳大利亚的14种不同的农业土壤中分离并鉴定了解磷的青霉菌。某些菌株具有商业化价值,特别适合在碱性土壤中使用。这些菌株包括一个Penicilliumbilaiae以及尚未鉴定的青霉菌种类。

关键词： Penicillium Penicillium bilaiae Penicillium radicum 解磷菌接种剂

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