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Charged Particle in a Flat Box with Static Electromagnetic Field and Landau’s Levels

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Single Charged Particle Motion in a Flat Surface with Static Electromagnetic Field and Quantum Hall Effect

Journal of Modern Physics（现代物理） 2020年第10期

作者： gustavo V.López Jorge A.Lizarraga

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Risk perception and knowledge of COVID-19 in patients with celiac disease

Journal of Modern Physics（现代物理） 2022年第11期

作者： gustavo v. lópez jorge a. lizarraga

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World Journal of Gastroenterology 2021年第12期27卷 1213-1225页

作者： Jamie Zhen Juan Pablo Stefanolo María de la Paz Temprano Caroline L Seiler Alberto Caminero Enrique de-Madaria Miguel Montoro Huguet Vivas Santiago Sonia Isabel Niveloni Edgardo gustavo Smecuol Luis Uzcanga Dominguez Elena Trucco Virginia Lopez Carolina Olano Pasquale Mansueto Antonio Carroccio Peter H Green Donald Duerksen Andrew S Day Jason A Tye-Din Julio César Bai Carolina Ciacci Elena F Verdú Benjamin Lebwohl M Ines Pinto-Sanchez Department of Medicine Farncombe Family Digestive Health Research InstituteMcMaster University Medical CenterHamilton Health SciencesHamilton L8S4K1ONCanada Department of Medicine Dr.C.Bonorino Udaondo Gastroenterology HospitalBuenos Aires 1264Argentina Department of Pancreatic Unit Hospital General Universitario de AlicanteAlicante 03010Spain Department of Medicine Instituto Aragonés de Ciencias de la Salud(IACS)Zaragoza 50009Spain Department of Medicine Hospital Universitario San Jorge.HuescaZaragoza 50004Spain Department of Gastroenterology Univ Hosp LeonGastroenterol UnitAltos de Nava S-NLeon 24071Spain Department of Medicine Instituto Nacional de Ciencias Médicas y Nutrición Salvador ZubiránMexico DF 14080Mexico Department of Medicine Universidad de la RepublicMontevideo 11800Uruguay Department of Internal Medicine PROMISE DepartmentUniversity of PalermoPalermo 90127Italy Department of Internal Medicine V.Cervello HospitalPROMISE DepartmentUniversity of PalermoPalermo 90127Italy Celiac Disease Center Columbia University Medical CenterColumbia UnivCeliac Dis CtrDiv Digest and Liver DisNew YorkNY 10032United States Department of Medicine St Boniface Gen HospUniversity of ManitobaWinnipeg R2H 2A6Canada Department of Paediatrics University of Otago ChristchurchChristchurch 8041New Zealand Department of Gastroenterology Royal Melbourne HospitalImmunology DivisionWalter and Eliza Hall InstituteMelbourne 3052Australia Department of Medicine Surgery and DentryScuola Medica SalernitanaUniversity of SalernoCeliac Center at the University Hospital San Giovanni di Dio e Ruggi di AragonaSalerno 84131Italy Department of Medicine Farncombe Family Digestive Research InstituteMcMaster UniversityHamilton L8S4K1ONCanada The Celiac Disease Center Columbia UniversityNew YorkNY 10032United States

BACKGROUND We recently demonstrated that the odds of contracting coronavirus disease 2019(COVID-19)in patients with celiac disease(CeD)is similar to that of the general ***,how patients with CeD perceive their COVID-19 risk may differ from their actual *** To investigate risk perceptions of contracting COVID-19 in patients with CeD and determine the factors that may influence their *** We distributed a survey throughout 10 countries between March and June 2020 and collected data on demographics,diet,COVID-19 testing,and risk perceptions of COVID-19 in patients with *** were recruited through various celiac associations,clinic visits,and social *** perception was assessed by asking individuals whether they believe patients with CeD are at an increased risk of contracting COVID-19 when compared to the general *** regression was used to determine the influencing factors associated with COVID-19 risk perception,such as age,sex,adherence to a gluten-free diet(GFD),and comorbidities such as cardiac conditions,respiratory conditions,and *** was presented as adjusted odds ratios(aORs)RESULTS A total of 10737 participants with CeD completed the *** them,6019(56.1%)patients with CeD perceived they were at a higher risk or were unsure if they were at a higher risk of contracting COVID-19 compared to the non-CeD population.A greater proportion of patients with CeD perceived an increased risk of contracting COVID-19 when compared to infections in general due to their CeD(56.1%vs 26.7%,P<0.0001).Consequently,34.8%reported taking extra COVID-19 precautions as a result of their *** of celiac associations were less likely to perceive an increased risk of COVID-19 when compared to non-members(49.5%vs 57.4%,P<0.0001).Older age(aOR:0.99;95%CI:0.99 to 0.99,P<0.001),male sex(aOR:0.84;95%CI:0.76 to 0.93,P=0.001),and strict adherence to a GFD(aOR:0.89;95%CI:0.82 to 0.96,P=0.007)were associated

关键词： Celiac disease Gluten Risk Infection Knowledge Perception Coronavirus COVID-19

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灰口铸铁的等温淬火和渗硼等温淬火

热处理 2016年第1期31卷 34-38页

作者： gustavo Bortoluci de Assis Fábio Edson Mariani Amadeu Lombardi Neto George Edward Totten Luiz Carlos Casteletti Universidade de Sao Paulo Brazil Universidade Tecnologica Federal do Parana Brazil Portland State University United States of America

等温淬火能显著改善灰口铸铁的力学性能,而通过渗硼等化学热处理提高其表面硬度能进一步扩展它的应用范围。本文研究用灰口铸铁试样的成分为3.6%C-2.1%Si-0.43%Mn-0.26%Cr-bal Fe。等温淬火工艺采用900℃奥氏体化,随后在240℃、300℃和... 详细信息

等温淬火能显著改善灰口铸铁的力学性能,而通过渗硼等化学热处理提高其表面硬度能进一步扩展它的应用范围。本文研究用灰口铸铁试样的成分为3.6%C-2.1%Si-0.43%Mn-0.26%Cr-bal Fe。等温淬火工艺采用900℃奥氏体化,随后在240℃、300℃和360℃的盐浴中分别保持1 h、2 h、3 h和4 h后空冷。对另一组试样进行渗硼等温淬火处理,其工艺为在950℃熔融硼砂中渗硼2-4 h,随后在240℃、300℃和360℃盐浴中分别保持1 h、2h、3 h和4 h后空冷。这种工艺不需为了等温淬火而另外加热。通过试样显微硬度的测定和黏着磨损性能试验发现,等温淬火显著提高了灰口铸铁的性能,而渗硼等温淬火则更进一步改善了灰口铸铁的性能。

关键词：灰口铸铁硼化物等温淬火渗硼-等温淬火黏着磨损

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左心房容积测量方法的对比研究

左心房容积测量方法的对比研究

Antimicrobial activity of calcium hydroxide and chlorhexidine on intratubular Candida albicans

第十届全国超声心动图学术会议

作者：姚桂华蒋桂花张运 Neelima Vallurupalli gustavo P. Camarano Leng Jiang 教育部和卫生部心血管重构和功能研究重点实验室山东大学齐鲁医院心内科美国马萨诸塞州塔夫茨大学医学院Baystate医疗中心心内科

目的左心房容积(LAV)是定量评价左心房大小的准确方法。常用的二维超声心动图(2DE)测量方法包括双平面面积长度(A-L)法和双平面Simpson’s法。而A-L法公式中所采用的长度L在临床上不尽一致:心尖四腔心和两腔心切面中较短的长度(SL)、较... 详细信息

目的左心房容积(LAV)是定量评价左心房大小的准确方法。常用的二维超声心动图(2DE)测量方法包括双平面面积长度(A-L)法和双平面Simpson’s法。而A-L法公式中所采用的长度L在临床上不尽一致:心尖四腔心和两腔心切面中较短的长度(SL)、较长的长度(LL)或二者的平均长度(AL)。本研究以实时三维超声心动图(3DE)测量的LAV为对比标准,对比不同2DE方法测量LAV的准确性。方法对100例行常规超声心动图检查的门诊病人进行前瞻性研究。年龄(59.0±15.2)岁,男性占44.0%。所有病人均为窦性心律,分别记录标准的心尖四腔心和两腔心2DE图像,清晰显示左心房轮廓,尽量避免左心房的短切,记录全容积3DE图像。分别应用双平面A-L法、双平面Simpson’s法和3DE法进行脱机测量LAV。采用配对t检验,线性回归和Bland-Altman方法进行对比分析。结果 3DELAV测值为(61.3±22.2)ml,双平面Simpson’s法和双平面A-L法测量的LAV均与3DE-LAV高度相关(r=0.93～0.94,P均<0.01)。双平面Simpson’s法与3DE的一致性[平均差=(1.1±8.2)ml,P=0.20)]明显优于A-L法。与3DE-LAV相比较,所有三种长度的双平面A-L法均显著高估LAV[SL:(7.2±9.1)ml,LL:(3.4±8.7)ml,AL:(5.2±8.8)ml,P均<0.01],其中以美国超声心动图学会(ASE)推荐的SL法高估LAV最为明显。无论是四腔心还是两腔心切面,A-L法公式中的长度L均显著低于Simpson’s法中的长度[四腔心:(51.2±7.4)ml vs(55.1±6.8)ml,两腔心:(55.2±6.3)ml vs(55.2±6.3)ml,P均<0.001]。双平面Simpson’s法测量LAV的观察者间和观察者内的变异最佳(4.5%和2.8%),其次是3DE(5.4%和4.8%),而双平面A-L法测量的变异最大(11.0%～12.0%和6.8%～7.5%)。结论双平面Simpson’s法和所有双平面A-L法测量的LAV与3DE-LAV均高度相关。采用不同长度L的A-L法均显著高估LAV,尤其是临床上最为常用的SL法的高估程度最为明显。而双平面Simpson’s法具有比A-L法更高的可重复性和与3DE-LAV更好的一致性,应作为临床上测量LAV的首选方法。

关键词：超声心动描记术,二维心房,左容积测量

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International Journal of Oral Science 2013年第1期5卷 32-36页

作者： Ronan Jacques Rezende Delgado Thaís Helena Gasparoto Carla Renata Sipert Claudia Ramos Pinheiro Ivaldo Gomes de Moraes Roberto Brandao Garcia Marco Antnio Hungaro Duarte Clóvis Monteiro Bramante Srgio Aparecido Torres gustavo Pompermaier Garlet Ana Paula Campanelli Norberti Bernardineli Department of Biological Sciences Bauru School of DentistryUniversity of Sao Paulo Department of Operative Dentistry Endodontics and Dental MaterialsBauru School of DentistryUniversity of Sao Paulo

This study investigated the efficacy of calcium hydroxide and chlorhexidine gel for the elimination of intratubular Candida albicans (***).Human single-rooted teeth contaminated with *** were treated with calcium hydroxide,2%chlorhexidine gel, calcium hydroxide plus 2%chlorhexidine gel,or saline(0.9%sodium chloride) as a positive *** samples obtained at depths of 0-100 and 100-200μm from the root canal system were analyzed for *** load by counting the number of colony forming units and for the percentage of viable *** using fluorescence ***,the antimicrobial activity of calcium hydroxide and the 2%chlorhexidine gel was evaluated by counting the number of colony forming *** 14 days of intracanal medication,there was a significant decrease in the number of *** colony forming units at a depth of 0-100μm with chlorhexidine treatment either with or without calcium hydroxide compared with the calcium hydroxide only ***,there were no differences in the number of colony forming units at the 100-200μm depth for any of the medications *** viability was also evaluated by vital staining techniques and fluorescence microscopy *** activity against *** significantly increased at both depths in the chlorhexidine groups with and without calcium hydroxide compared with the groups treated with calcium hydroxide *** with only chlorhexidine or chlorhexidine in combination with calcium hydroxide were effective for elimination of ***.

关键词： calcium hydroxide Candida albicans chlorhexidine endodontics

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润滑条件对304L钢丝拉拔参数的影响

金属制品 2004年第B5期30卷 35-36页

作者： gustavo Aristides Santana Martínez Sérgio Tonini Button Roger N.Wright 赵玉兰

1试验设备试验使用可调速的单卷筒拉丝机.直流电机功率14.7 kW,最大转速为2 000 r/min.拉丝速度1～22m/s,由数字调速器控制.拉丝模和润滑剂的温度变化由热电偶检测控制,额定值为500 N的测压元件和敏感度为2 mV/V的压力传感器测量拉拔力.

关键词：润滑剂 304L 拉拔速度影响

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渗硼对沉淀硬化铌不锈钢的影响

热处理 2016年第4期31卷 42-46页

作者： Luiz Carlos Casteletti gustavo Satoru Takeya Fábio Edson Mariani Amadeu Lombardi Neto George E.Totten 本刊编辑部 University of So Paulo-USP/EESC Paraná Federal Technological University-UTFPR Portland State University

沉淀硬化不锈钢是含铝、钛、铌和铜等沉淀硬化元素的铁-镍-铬合金。沉淀硬化过程包括非常细小的金属间相的形成(析出),如Laves相Fe_2(Mo,Nb),Ni_3M(M:Al,Ti,Nb,Cu,V,Mo,W),Nb(C,N)和碳氮化物Ti(C,N)及碳化物Fe_3Nb_3C(M_6C)。本文对沉... 详细信息

沉淀硬化不锈钢是含铝、钛、铌和铜等沉淀硬化元素的铁-镍-铬合金。沉淀硬化过程包括非常细小的金属间相的形成(析出),如Laves相Fe_2(Mo,Nb),Ni_3M(M:Al,Ti,Nb,Cu,V,Mo,W),Nb(C,N)和碳氮化物Ti(C,N)及碳化物Fe_3Nb_3C(M_6C)。本文对沉淀硬化钢进行了渗硼处理,为了提高硬度和耐磨性,该钢以铌作硬化剂。钢的成分为0.03C-0.22Si-17.86Cr-3.91Ni-2.14Mo-1.96Nb(质量分数,%)。渗硼在添加10%Al的熔融硼砂中进行,温度1 100℃,时间4 h,油冷,随后于500℃时效。结果获得了硬度高、耐磨性好的硼化物层。

关键词：不锈钢沉淀硬化渗硼黏着磨损

Solvent-Free Synthesis of Carboxylic Acids and Amide Analogs of CAPE(Caffeic Acid Phenethyl Ester)under Infrared Irradiation Conditions

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Green and Sustainable Chemistry 2015年第2期5卷 81-91页

作者： Pablo A.Martínez-Soriano Jose R.Macías-Perez Ana Maria Velazquez Brigida del Carmen Camacho-Enriquez gustavo Pretelin-Castillo Monica B.Ruiz-Sanchez Victor H.Abrego-Reyes Saul Villa-Trevino Enrique Angeles Laboratorio de Quimica Medicinal y Teorica Departamento de Ciencias QuimicasFES CuautitlanUniversidad Nacional Autonoma de MexicoCuautitlan IzcalliMexico Departamento de Biologia celular Centro de Investigacion y Estudios AvanzadosInstituto Politecnico NacionalMexicoD.F.Mexico Qsar Analytics S.A.de C.V.Ciudad Satelite Naucalpan de JuarezMexico

A convenient and easy method is described for the formation of carboxamides from carboxylic acids and primary amines in solventless conditions using infrared (IR) light. Thus, under IR light, cinnamic acid derivatives... 详细信息

关键词： Amides Carboxylic Acids Amines Infrared Light Solventless CAPE CAPA Cinnamic Acid Analogs