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Journal articles on the topic 'VP SEM)'

Author: Grafiati

Published: 4 June 2021

Last updated: 22 February 2023

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1

Rafaelsen, Jens, and T. Nylese. "EDS and VP-SEM: Practical Considerations and Challenges." Microscopy and Microanalysis 24, S1 (2018): 684–85. http://dx.doi.org/10.1017/s1431927618003914.

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Nishimura, Masako, Sukehiro Itoh, and Steve Joens. "Development of a Field Emission VP-SEM and Some Initial Applications." Microscopy and Microanalysis 7, S2 (2001): 882–83. http://dx.doi.org/10.1017/s1431927600030488.

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The use of variable pressure SEMs (VP-SEMs) is increasing in various fields of science and industry, allowing microscopy in a variable pressure environment of 1 ∼ 270 Pa utilizing backscattered electrons for imaging. The VP-SEM allows microscopy of insulated samples without the need for sample preparation. Charging artifacts can be minimized as well. When the VP-SEM is operated with a cooling stage, which allows cooling of samples at −20° and above, vaporization of water from samples is reduced. This permits microscopy of wet samples at close to the natural state for extended periods of time.P

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Newbury, Dale E. "Diagnostics for Assessing Spectral Quality for X-Ray Microanalysis in Low Voltage and Variable Pressure Scanning Electron Microscopy." Microscopy and Microanalysis 7, S2 (2001): 702–3. http://dx.doi.org/10.1017/s1431927600029585.

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There is increasing interest in performing x-ray microanalysis of uncoated insulators while operating in unconventional SEM operating modes such as “low voltage” scanning electron microscopy (LVSEM), where the accelerating voltage is ≤ 5 kV and the pressure is low (<10-4 Pa), or variable pressure environmental SEM (VP-ESEM), where a selected gas is maintained at pressures in the range of 1 Pa -1000 Pa. LVSEM and VP-ESEM as microscopy techniques have proven to be extremely successful for imaging uncoated insulators through various charge dissipation mechanisms that are not available under co

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Relucenti, Michela, Giuseppe Familiari, Orlando Donfrancesco, et al. "Microscopy Methods for Biofilm Imaging: Focus on SEM and VP-SEM Pros and Cons." Biology 10, no. 1 (2021): 51. http://dx.doi.org/10.3390/biology10010051.

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Several imaging methodologies have been used in biofilm studies, contributing to deepening the knowledge on their structure. This review illustrates the most widely used microscopy techniques in biofilm investigations, focusing on traditional and innovative scanning electron microscopy techniques such as scanning electron microscopy (SEM), variable pressure SEM (VP-SEM), environmental SEM (ESEM), and the more recent ambiental SEM (ASEM), ending with the cutting edge Cryo-SEM and focused ion beam SEM (FIB SEM), highlighting the pros and cons of several methods with particular emphasis on conven

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Robertson, Kevin, Raynald Gauvin, and James Finch. "Charge Contrast Imaging of Gibbsite Using the Variable Pressure SEM." Microscopy and Microanalysis 10, no. 6 (2004): 721–32. http://dx.doi.org/10.1017/s1431927604040590.

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The variable pressure scanning electron microscope (VP-SEM) allows imaging of insulators without the need for a conductive coating, due to charge neutralization at the surface from recombination of positive ions and surface electrons. Varying certain parameters such as pressure, bias, and working distance creates incomplete neutralization, and localized charging develops called charge contrast. Although the exact mechanism creating charge contrast imaging (CCI) is unknown, it is agreed that it is related to an optimum charge compensation. The behavior of the CCI is still vague, which presents

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Jirak, J., P. Čudek, and V. Nedela. "Detection of Secondary Electrons by Scintillation Detector at VP SEM." Microscopy and Microanalysis 17, S2 (2011): 922–23. http://dx.doi.org/10.1017/s1431927611005484.

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Myers, BD, Z. Pan, and VP Dravid. "Beam skirting effects on energy deposition profile in VP-SEM." Microscopy and Microanalysis 14, S2 (2008): 1208–9. http://dx.doi.org/10.1017/s1431927608085589.

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DUBEY, J. P., M. HILALI, E. VAN WILPE, S. K. VERMA, R. CALERO-BERNAL, and A. ABDEL-WAHAB. "Redescription of Sarcocystis fusiformis sarcocysts from the water buffalo (Bubalus bubalis)." Parasitology 142, no. 2 (2014): 385–94. http://dx.doi.org/10.1017/s003118201400122x.

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SUMMARYFour valid species of Sarcocystis have been reported from the water buffalo (Bubalus bubalis): Sarcocystis fusiformis, Sarcocystis buffalonis, Sarcocystis levinei and Sarcocystis dubeyi. Here, we redescribe structure of S. fusiformis sarcocysts by scanning and transmission electron microscopy (SEM, TEM). Twenty-one macroscopic sarcocysts from oesophagus of the water buffalo in Egypt were examined by light microscopy, SEM and TEM. The sarcocyst wall was up to 9 μm thick, depending on the section and the technique. In 5 μm paraffin-embedded sections, the sarcocyst wall was indistinct, 2–5

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Kato, Mary. "Clivadas sem operador no português brasileiro (Clefts without an operator in Brazilian Portuguese)." Estudos da Língua(gem) 8, no. 2 (2010): 61. http://dx.doi.org/10.22481/el.v8i2.1128.

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O português apresenta um tipo de sentença que tem sido tradicionalmente analisado como uma pseudo-clivada reduzida, as semi-clivadas, obtidas através do apagamento do operador-Q. Construcões semelhantes são também encontradas no Espanhol Caribenho (EsC) e analisadas como tendo um Operador nulo. Percebendo que nem todas as pseudo-clivadas têm uma reduzida correspondente, Bosque (1999) e Camacho (2006), tratando do EsC, e Mioto (2008), tratando do português brasileiro (PB), propoÃÉem uma derivação independente para as semi-clivadas. O presente trabalho se constitui numa tentativa diferente de ex

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Gauvin, Raynald. "X-Ray Microanalysis of Materials in the ESEM or VP-SEM." Microscopy and Microanalysis 7, S2 (2001): 778–79. http://dx.doi.org/10.1017/s1431927600029962.

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When performing X-Ray microanalysis in the ESEM (Environmental Scanning Electron Microscope) or in the VP-SEM (Variable Pressure Scanning Electron Microscope), the operating conditions of the microscope must be optimized. This is to reduce the beam broadening of the incident electrons when they scatter with the gas molecules before entering into the specimen. As a result of this scattering, the incident beam is composed of two parts. The first part of the beam is the unscattered beam and the second part is the scattered beam, named the skirt. in high pressure and long working distances conditi

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Yang, Zi, De An Yang та Hong Zhao. "Degradation Behavior of Calcium Sulfate/β-Tricalcium Phosphate Composites in Tris". Key Engineering Materials 336-338 (квітень 2007): 1635–37. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1635.

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CaSO4/β-TCP composite powders were prepared by mixing CaSO4 and β-TCP. The CaSO4 /β-TCP (VS: VP) values were varied from 3:2 to 0:1. The composites were sintered at different temperatures. Tris was used to evaluate degradation behavior of the composites. The morphologies of composites before and after degradation were studied by SEM. The results show that degradation was increased with the increasing of VS: VP and decreased with the increasing of sintered temperatures.

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Marcos, Celia, Alaa Adawy, and Irene Rodríguez. "Relationship between Textural Parameters of Lamellar Products Obtained by Acid Activation of Pure and Commercial Vermiculites and Their Iron and Water Content." Minerals 10, no. 8 (2020): 661. http://dx.doi.org/10.3390/min10080661.

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The relationship between textural parameters (specific superficial area (SBET) and porosity (Vp)) of lamellar products obtained from HNO3-activated vermiculites and their iron and water content has been established. Two commercial vermiculites, one thermoexfoliated commercial vermiculite, and one pure vermiculite were nitric-acid-treated at 4 and 8 M concentrations for 1, 3, and 7 days. Untreated and treated samples were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and N2 physisorption analysis. The un

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Martínez, Iririana, Ricardo Santillán, Iliana Fuentes Camargo, Julia Liliana Rodríguez, J. Alberto Andraca Adame, and Hugo Martínez Gutiérrez. "Synthesis and Characterization of Poly(2-Vinylpyridine) and Poly(4-Vinylpyridine) with Metal Oxide (TiO2, ZnO) Films for the Photocatalytic Degradation of Methyl Orange and Benzoic Acid." Polymers 14, no. 21 (2022): 4666. http://dx.doi.org/10.3390/polym14214666.

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In this study, composite material films of pyridine-based polymer and metal oxides (ZnO and TiO2) were successfully deposited by spin coating method for environmental remediation. Firstly, the polymers poly(2-vinylpyridine) P(2-VP), and poly(4-vinylpyridine) P(4-VP) were synthesized via solution polymerization. The analysis by grazing incidence X-ray diffraction (GIXRD) reveals semicrystalline nature and scanning electron microscopy (SEM) indicates that the poly(vinylpyridines) clusters of particles were observed on the surface of the films. It was also shown that the morphology of composite m

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Redler, Andrea, Selenia Miglietta, Edoardo Monaco, et al. "Ultrastructural Assessment of the Anterolateral Ligament." Orthopaedic Journal of Sports Medicine 7, no. 12 (2019): 232596711988792. http://dx.doi.org/10.1177/2325967119887920.

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Background: The anterolateral ligament (ALL) has been identified as a structure on the lateral side of the knee, but debate exists regarding whether it is a capsular thickening or a ligament. Hypothesis: A detailed ultrastructural characterization of the ALL and its ultrastructure collagen arrangement will reveal it more closely resembles ligamentous tissue than joint capsule. Study Design: Descriptive laboratory study. Methods: Eight paired knee samples from 4 fresh-frozen male cadavers were used for this study. Samples were harvested from the ALL, the joint capsule, and the medial collateral

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Kato, Mary. "A mudança na posição estrutural de foco no português brasileiro." Revista Linguíʃtica 13, no. 2 (2017): 158. http://dx.doi.org/10.31513/linguistica.2017.v13n2a13507.

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O presente capítulo é uma revisita aos estudos diacrônicos de Kato e de Kato e colaboradores sobre o PB no que diz respeito às estruturas de Foco, mostrando que antes do século XVIII o português fazia uso da projeção alta do FocusP, na periferia da sentença, e que a grande mudança estrutural relativamente a Foco tem a ver com a desativação desse Focus alto e a ativação da periferia baixa adjacente ao vP, tanto para foco como também para os constituintes-wh. Mudanças mais recentes são analisadas como processos em PF. Consideramos neste trabalho uma alternativa à cartografa, com um CP sem expans

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16

LeRiche, E. L., G. Wang-Pruski, and V. D. Zheljazkov. "Mineral concentration and distribution in tubers of fertilized and unfertilized potato cultivars Shepody and Russet Burbank as determined by VP-SEM/EDS." Canadian Journal of Plant Science 86, Special Issue (2006): 1349–53. http://dx.doi.org/10.4141/p06-104.

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Plant nutrients are difficult to measure in situ using traditional chemical methods. In this study, a variable pressure scanning electron microscope (VP-SEM) equipped with energy dispersive X-ray spectrometry (EDS) was used to map elemental nutrients in potato tissue. Samples were taken from tubers of the cultivars Shepody and Russet Burbank from fertilized and non-fertilized plots. Each sample was divided into eight segments from stem to bud. X-ray mapping showed a higher overall concentration of P, M g, and Ca in tubers from fertilized plots compared with those from unfertilized plots for Sh

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17

Supriyanto, Budi, S. Pantja Djati, Nurbaeti Nurbaeti, and Myrza Rahmanita. "Analysis of The Influence of Image, Quality Perception, and Risk Perception on Decision To Play Traditional Games Through Value Perception As Intervening." International Conference On Research And Development (ICORAD) 1, no. 2 (2022): 211–16. http://dx.doi.org/10.47841/icorad.v1i2.39.

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Modern games dominate the games of children, teenagers, adults and even parents in today's urban areas. Smartphones resulting from technological developments can be installed into various digital games, played anytime and anywhere during the spare time using hand fingers in operation. While traditional games are less technological developments and are gradually being abandoned, they have many benefits of social competence, such as problem-solving, self-control, cooperation and empathy and are derived from noble cultural values. This study examines the variables of image, quality perception and

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18

Liu, Zong-lai, Tong-tong Yue, Wen-tian Sun, Feng-jun Zhang, and Wei Feng. "The regulatory effects of the number of VP(N-vinylpyrrolidone) function groups on macrostructure and photochromic properties of polyoxometalates/copolymer hybrid films." e-Polymers 20, no. 1 (2019): 1–7. http://dx.doi.org/10.1515/epoly-2020-0001.

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AbstractNanocomposite films were synthesized by introducing phosphotungstic acid (PWA) into the poly (vinylpyrrolidone and methyl acrylate) (P (VP(N-vinylpyrrolidone)coMA(methyl acrylate))). FT-IR curves illustrated that non-covalent bond interaction was built between PWA particles and organic matrixes. In combination the results of SEM, TG-DTA and DSC, it was conducted that the ratio of functional groups of VP had a critical effect on the surface morphology, thermal stability of the hybrid films. Irradiated with ultraviolet light, the transparent thin hybrid films change from colorless to blu

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Keller, Bob. "What's in a 'NYM?" Microscopy Today 21, no. 4 (2013): 72. http://dx.doi.org/10.1017/s1551929513000758.

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The field of electron microscopy, by its diverse nature, abounds with acronyms: AEM, EF-TEM, ESEM, FE-SEM, HREM, HRTEM, HVEM, SEM, STEM, TEM, and VP-SEM, to name a few of the instruments. Add in the different forms of data that these instruments might collect, and it can be overwhelming: ADF, BF, BSE, CBED, CL, DF, EBIC, EBSD/BEKP/BKD/EBSP, ECCI, EDS/EDX, EELS, HAADF, NBD, SAD, and SE. For the brave reader, check out the acronym listing at the beginning of DB Williams and CB Carter's series on TEM.

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Taokaew, Siriporn, Saowalak Phonsee, Nisanart Woravut, Tasana Pitaksutepong, and Worawut Kriangkrai. "Characteristic Assessment of the Polymeric Films Used for Hair Gel Products in Thailand." Key Engineering Materials 819 (August 2019): 98–103. http://dx.doi.org/10.4028/www.scientific.net/kem.819.98.

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The market of hair gel products in Thailand steadily grows with the changing trend of fashion every year. The main component of the hair gel products is the fixative polymer, which plays a role in hair styling properties including stiffness and curl retention. Properties of the hair styling product depending on hair types and climates must be suitably improved for Thai hair. In this study, 10 %w/w gel solutions of polyacrylic acid, polyquaternium-86, polyvinylpyrrolidone (PVP), acrylates copolymer, and vinylpyrrolidone (VP) copolymers were cast as polymeric thin films. The film properties such

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Nemes, Maria Ines Battistella, Tatianna Meirelles Dantas Alencar, Cáritas Relva Basso, et al. "Avaliação de serviços de assistência ambulatorial em aids, Brasil: estudo comparativo 2001/2007." Revista de Saúde Pública 47, no. 1 (2013): 137–46. http://dx.doi.org/10.1590/s0034-89102013000100018.

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OBJETIVO: Avaliar os serviços do Sistema Único de Saúde brasileiro de assistência ambulatorial a adultos vivendo com aids em 2007 e comparar com a avaliação de 2001. MÉTODOS: Os 636 serviços cadastrados no Ministério da Saúde em 2007 foram convidados a responder a um questionário previamente validado (Questionário Qualiaids) com 107 questões de múltipla escolha sobre a organização da assistência prestada. Analisaram-se as frequências das respostas de 2007 comparando-as com as obtidas em 2001 na forma de variação percentual (VP). RESULTADOS: Responderam o questionário 504 (79,2%) serviços. Cerc

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Thomas, Cláudio, César Martins Andrade, Paulo Renato Schneider, and César Augusto Guimarães Finger. "Comparação de equações volumétricas ajustadas com dados de cubagem e análise de tronco." Ciência Florestal 16, no. 3 (2006): 319. http://dx.doi.org/10.5902/198050981911.

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Este trabalho teve como objetivo comparar estimativas de volume com casca, obtidas com equações originadas partindo de dados da cubagem com casca e análise de tronco sem casca respectivamente. A base de informações para o desenvolvimento deste estudo foi obtida em povoamentos de Pinus taeda L. no município de Ponte Alta do Norte, Santa Catarina, sendo composta de duzentos e quarenta árvores cubadas com casca em diferentes idades, as quais foram selecionadas aleatoriamente e distribuídas por classe de diâmetro. Outra fonte de dados foi obtida com a análise de tronco sem casca de trinta árvores-

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Krammer, Olivér. "Comparing the reliability and intermetallic layer of solder joints prepared with infrared and vapour phase soldering." Soldering & Surface Mount Technology 26, no. 4 (2014): 214–22. http://dx.doi.org/10.1108/ssmt-09-2013-0023.

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Purpose – The purpose of this paper is to compare the reliability and intermetallic layer (IML) of solder joints prepared with infrared (IR) and vapour phase (VP) soldering. The reliability of 0603-sized resistors’ solder joints formed with IR and VP soldering was investigated. The IML of the joints was analysed based on image processing algorithm automatically. Design/methodology/approach – For the reliability analyses, the ageing method was a highly accelerated stress test (HAST) with +105°C maximum temperature, fully saturated (100 per cent) relative humidity at +0.5 atm overpressure. The j

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Pidakhmet, А., E. E. Ergozhin, T. K. Chalov, and A. I. Nikitina. "Sorption of Perrhenate Ions by a New Anion Exchanger Based on an Oligomer of Epichlorohydrin and 4-vinylpyridine." Eurasian Chemico-Technological Journal 15, no. 4 (2015): 321. http://dx.doi.org/10.18321/ectj238.

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<p>In this study, oligomer epichlorohydrine (OECH) was crosslinked with 4-vinylpyridin (VP) present initiator of peroxide benzoyl (BP). The resulting anionite (OECH-VP) was characterized by scanning<br /> electron microscopy (SEM) and tested for perrhenate ions sorption. The new macropore anion exchange resin was synthesized by polycondensation of epichlorohydrin oligomer and 4-vinylpyridine, the static exchange capacity (SEC) of which is equal to 6.75 mg-equiv∙g<sup>-1</sup> in 0.1 M HCI solution and the sorption of perrhenate ions was studied. The influence of the con

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Atta, Ezzat, Al-Lohedan, Tawfeek, and Alobaidi. "Preparation of pH Responsive Polystyrene and Polyvinyl Pyridine Nanospheres Stabilized by Mickering Microgel Emulsions." Nanomaterials 9, no. 12 (2019): 1693. http://dx.doi.org/10.3390/nano9121693.

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New pH-sensitive polystyrene, PS, and poly(4-vinylpyridine), P4-VP, nanospheres were prepared by using surfactant-free method based on soft microgels (Mickering emulsion). The formation of stable Mickering cyclohexane/water emulsions was investigated by using soft microgel particles of poly(acrylamide), PAAm, poly(2-acrylamido-2-methylpropane sulfonic acid), PAMPS, and sodium salt of PAMPS, PAMPS-Na, as stabilizers. The dynamic light scattering (DLS), optical microscopy, and scanning electron microscopy (SEM) were used to investigate the optimum conditions and effects of surrounding solutions

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Farias, K. V., L. V. Amorim, H. C. Ferreira, and E. Pereira. "Estudo da reologia e espessura do reboco de fluidos de perfuração: influência de dispersantes e umectante aniônicos." Cerâmica 52, no. 324 (2006): 307–14. http://dx.doi.org/10.1590/s0366-69132006000400015.

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Este trabalho teve como objetivo avaliar a influência de aditivos dispersantes e umectante aniônicos nas viscosidades aparente (VA) e plástica (VP), no volume de filtrado (VF) e na espessura do reboco (ER) de fluidos de perfuração á base de água e argila bentonítica. Os fluidos foram preparados com 4,86% em massa de argila bentonítica e os aditivos estudados nas concentrações de 0,025 g a 0,300 g/24,3 g de argila seca para os dispersantes e de 0,005 g a 0,300 g/24,3 g de argila seca para o umectante aniônico. Os resultados mostraram que a espessura do reboco foi significativamente reduzida pel

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Putra, Nicko Kornelius, and Agus Kuntoro. "ANALISIS CAPAIAN PEMBELAJARAN PADA MAHASISWA AKUNTANSI (Eksperimen Kuasi)." Wahana: Jurnal Ekonomi, Manajemen dan Akuntansi 23, no. 1 (2020): 35–58. http://dx.doi.org/10.35591/wahana.v23i1.165.

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Abstract. This study aims to analyze the learning outcomes shown by accounting students in certain subjects. The effort to realize learning outcomes is carried out through course simulation learning tools in the form of quizzes that are packaged in the games "Who Wants To Be A Millionaire". Participants in quasi-experimental research (quasi-experiments) are 100 Accounting and / or Management students at Sanata Dharma who have passed introductory Accounting courses, and 100 AA YKPN Accounting students who have passed introductory Accounting courses too. Participants were divided into control gr

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Azzouzi, Mohamed El, Abdelfattah Achahbar, and Lahcen Khouchaf. "Monte Carlo simulation of electron-gas-solid interactions in silicate phases under VP-SEM." Procedia Manufacturing 32 (2019): 916–20. http://dx.doi.org/10.1016/j.promfg.2019.02.303.

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Gauvin, Raynald. "The Computation of the Skirt in VP-SEM OR ESEM With Monte Carlo Simulations." Microscopy and Microanalysis 5, S2 (1999): 296–97. http://dx.doi.org/10.1017/s143192760001480x.

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It is well known that the interaction of the electron beam with the gas in the VP-SEM or ESEM generate the so-called skirt as a result of the elastic collisions between the electrons and the molecules. Since the electrons in the skirt hit the specimen far away from the electron beam, they degrade the resolution of the analyses performed in the VPSEM or ESEM. However, the magnitude and the shape of the skirt are still a matter of controversy despite the fundamental importance of knowing these two factors. In this context, a Monte Carlo program has been developed to simulate the interaction of t

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Rinaudo, Caterina, Alessandro Croce, Stefania Erra, et al. "Asbestos Fibers and Ferruginous Bodies Detected by VP-SEM/EDS in Colon Tissues of a Patient Affected by Colon-Rectum Cancer: A Case Study." Minerals 11, no. 6 (2021): 658. http://dx.doi.org/10.3390/min11060658.

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The aim of this work was to inspect the presence of asbestos fibers in colon tissue from a patient, with history of indirect exposure to asbestos and affected by colon cancer, who underwent surgery. Variable pressure scanning electron microscopy, coupled with energy dispersive spectroscopy (VP-SEM/EDS), was used for identification of inorganic fibers and for their morphological- chemical characterization. Fresh tissue samples from both, healthy area close to the neoplasia and from the neoplastic regions, were separately digested to eliminate the biological matrix. The precipitate was analyzed

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Samad, Wan Zurina, Mohd Ambar Yarmo, and Muhamad Mat Salleh. "Characterization of Fluoro-Doped Tin Oxide Films Prepared by Newly Approached of Inkjet Printing Methods." Advanced Materials Research 173 (December 2010): 128–33. http://dx.doi.org/10.4028/www.scientific.net/amr.173.128.

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A comparison study on deposition temperature between 40oC and 60oC using new route coating which is inkjet printing technique have been studied in this research paper. The FTO material were prepared by a common mixture technique between precursor solution of SnCl4.5H2O and NH4F as a doping agent. The prepared samples were coated on the glass substrate sized 20mm x 25mm and were calcined at 450oC. The samples were characterized using XRD, XPS, VP-SEM and UV-VIS. From the VP-SEM, the result show the different surface morphology between the two deposition temperatures. Samples prepared at 60oC sh

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Słówko, Witold, and Michał Krysztof. "Secondary Electron Detector with the Unipotential Lens Structure for Variable Pressure/Environmental SEM." Solid State Phenomena 186 (March 2012): 24–27. http://dx.doi.org/10.4028/www.scientific.net/ssp.186.24.

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To extend capabilities of classic instruments toward the VP/E technique, authors designed the vacuum-detector system in the form of a simple attachment, which can be mounted to a classic SEM, without changes in its original structure. The main part of the system is the vacuum and detection head, combining the intermediate chamber and electron detectors of chosen kinds. Authors investigate the SE detector showing the unipotential lens structure to find optimum solution for a wide range of gas pressures from high vacuum to pressures exceeding 10 mbar.

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Mao, Jinwang, Ninghui Liang, and Ru Yan. "Failure mechanism on sulfate attack and dissolved corrosion of diseased tunnel lining structure." 59th International Conference on Vibroengineering in Dubai, United Arab Emirates, October 22, 2022 45 (October 22, 2022): 53–59. http://dx.doi.org/10.21595/vp.2022.22869.

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To study the corrosion failure mechanism of tunnel lining structure subjected to sulfate attack and dissolved corrosion, site investigation was carried out on a diseased tunnel in Chongqing. The corrosion products were analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The results showed that the tunnel lining structure had been exposed to groundwater containing substantial concentrations of salts (SO42-, HCO3-, et al.) for many years, resulted that the concrete strength was lower tha

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Romagnoli, Ruggero, Sergio Civitella, Carlo Minganti, and Maria Francesca Piacentini. "Concurrent and Predictive Validity of An Exercise-Specific Scale for the Perception of Velocity in the Back Squat." International Journal of Environmental Research and Public Health 19, no. 18 (2022): 11440. http://dx.doi.org/10.3390/ijerph191811440.

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Background: the aim of the study was to develop and validate a specific perception velocity scale for the Back Squat exercise to discriminate the velocity of each repetition during a set. Methods: 31 resistance trained participants completed 3 evaluation sessions, consisting of 3 blinded loads (light, medium, heavy). For each repetition, barbell mean velocity (Vr) was measured with a linear position transducer while perceived velocity (Vp) was reported using the Squat Perception of Velocity (PV) Scale. Results: Pearson correlation coefficients (r) showed very high values for each intensity in

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El Azzouzi, M., L. Khouchaf, and A. Achahbar. "Monte Carlo Study of the Interaction Volume Changes by the Beam Skirt in VP-SEM." Acta Physica Polonica A 132, no. 4 (2017): 1393–98. http://dx.doi.org/10.12693/aphyspola.132.1393.

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Qureshi, Muhammad, Guenther Stecher, Christian Huck, and Guenther Bonn. "Preparation of polymer based sorbents for solid phase extraction of polyphenolic compounds." Open Chemistry 9, no. 2 (2011): 206–12. http://dx.doi.org/10.2478/s11532-011-0006-x.

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AbstractThis article discusses the preparation of different polymeric sorbents for solid phase extraction. Various monomers like acrylamide, methacrylic acid and 4-vinylpyridine (VP), cross-linkers such as divinylbenzene (DVB) and ethyleneglycoldimethacrylate (EDMA), porogens like tetrahydrofuran (THF) and dimethylsulphoxide (DMSO) / acetonitrile (ACN) with different ratios were investigated in order to optimize recoveries. Resulting polymers were characterized through scanning electron microscope (SEM) and compared with Oasis HLB (Waters, MA, USA) and Strata-X (Phenomenex, Torrance, USA) on t

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Jaekel, Julia, Christian Sorg, Josef Baeuml, Peter Bartmann, and Dieter Wolke. "Head Growth and Intelligence from Birth to Adulthood in Very Preterm and Term Born Individuals." Journal of the International Neuropsychological Society 25, no. 1 (2018): 48–56. http://dx.doi.org/10.1017/s135561771800084x.

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AbstractObjectives: The aim of this study was to investigate the effects of infant and toddler head growth on intelligence scores from early childhood to adulthood in very preterm (<32 weeks gestational age; VP) and/or very low birth weight (<1500 g; VLBW) and term born individuals. Methods: 203 VP/VLBW and 198 term comparisons were studied from birth to adulthood as part of the prospective geographically defined Bavarian Longitudinal Study (BLS). Head circumference was assessed at birth; 5, 20 months; and 4 years of age. Intelligence was assessed with standardized tests in childhood (6

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Meyerholz, D. K., T. J. Stabel, M. R. Ackermann, S. A. Carlson, B. D. Jones, and J. Pohlenz. "Early Epithelial Invasion by Salmonella enterica Serovar Typhimurium DT104 in the Swine Ileum." Veterinary Pathology 39, no. 6 (2002): 712–20. http://dx.doi.org/10.1354/vp.39-6-712.

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Salmonella enterica serovar Typhimurium is an important intestinal pathogen in swine. This study was performed to document the early cellular invasion of Salmonella serovar Typhimurium in swine ileum. Ileal gut-loops were surgically prepared in ten 4- to 5-week-old mixed-breed pigs and inoculated for 0-60 minutes. Loops were harvested and prepared for both scanning and transmission electron microscopy (SEM and TEM, respectively). Preferential bacterial adherence to microfold cells (M cells) was seen within 5 minutes, and by 10 minutes bacterial invasion of the apical membrane was seen in M cel

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Kadoun, A., R. Belkorissat, C. Mathieu, and B. Khelifa. "Computation and Experiments on the Beam Spread in the VP-SEM: Application to X-Ray Microanalysis." Journal of Trace and Microprobe Techniques 21, no. 2 (2003): 229–38. http://dx.doi.org/10.1081/tma-120020258.

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Gossett, Eric M., Ellen B. Scanley, Yanhui Liu, et al. "Computational Nanocharacterization for Combinatorially Developed Bulk Metallic Glass." International Journal of High Speed Electronics and Systems 24, no. 03n04 (2015): 1520012. http://dx.doi.org/10.1142/s0129156415200128.

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Bulk metallic glasses synthesized at specialized facilities at Yale using magnetron cosputtering are sent to Southern Connecticut State University for elemental characterization. Characterization is done using a Zeiss Sigma VP SEM coupled with an Oxford EDS. Characterization is automated using control software provided by Oxford. Collected data is processed and visualized using computational methods developed internally. Processed data is then organized into a database suitable for web retrieval. This technique allows for the rapid characterization of a combinatorial wafer to be carried out in

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Ravines, P., N. Erdman, and R. McElroy. "A Look at Platinum Prints Using Variable Pressure/Environmental High Resolution Scanning Electron Microscopy -VP HR SEM." Microscopy and Microanalysis 19, S2 (2013): 1402–3. http://dx.doi.org/10.1017/s1431927613009008.

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Weimer, Paul J., Neil P. J. Price, Otini Kroukamp, Lydia-Marie Joubert, Gideon M. Wolfaardt, and Willem H. Van Zyl. "Studies of the Extracellular Glycocalyx of the Anaerobic Cellulolytic Bacterium Ruminococcus albus 7." Applied and Environmental Microbiology 72, no. 12 (2006): 7559–66. http://dx.doi.org/10.1128/aem.01632-06.

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ABSTRACT Anaerobic cellulolytic bacteria are thought to adhere to cellulose via several mechanisms, including production of a glycocalyx containing extracellular polymeric substances (EPS). As the compositions and structures of these glycocalyces have not been elucidated, variable-pressure scanning electron microscopy (VP-SEM) and chemical analysis were used to characterize the glycocalyx of the ruminal bacterium Ruminococcus albus strain 7. VP-SEM revealed that growth of this strain was accompanied by the formation of thin cellular extensions that allowed the bacterium to adhere to cellulose,

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NASCIMENTO, Silvia Helena Lovato do. "Os verbos inacusativos do Português Brasileiro: uma proposta de categorização." DELTA: Documentação de Estudos em Lingüística Teórica e Aplicada 30, no. 2 (2014): 237–56. http://dx.doi.org/10.1590/0102-445091976024610089.

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Este trabalho propõe uma descrição dos verbos inacusativos do Português Brasileiro em termos de duas grandes categorias: a dos inacusativos primitivos e a dos inacusativos derivados. Da primeira categoria fazem parte os inacusativos que não derivam de estruturas transitivas e não podem aparecer com mais de um argumento. Da segunda grande classe pertencem os verbos psicológicos e os verbos que podem sofrer a alternância AVB→VB. O trabalho mostra ainda que é possível adotar a hipótese do VP oracional (Larson 1988), assumida em Chomsky (1995), para representar essas estruturas sem contrariar a Ge

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Gauvin, Raynald, and David C. Joy. "On the Measurement of Total Elastic Cross-sections in the ESEM or VPSEM Using X-Ray Microanalysis." Microscopy and Microanalysis 6, S2 (2000): 788–89. http://dx.doi.org/10.1017/s1431927600036436.

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It is of paramount importance to know the total elastic-scattering cross sections of the gases which are present in the specimen chamber of the variable pressure scanning electron microscope (VP-SEM) or in the environmental SEM (ESEM) since these values are needed to compute the width of the beam broadening skirt by the use of Monte Carlo simulations. However, these values are not well known for even the most common gases because the vibrational modes of the molecules add another contribution to the usual value of the elastic scattering cross-section. To overcome this difficulty a method has b

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Hafsi, Z., O. Mansour, A. Kadoun, L. Khouchaf, and C. Mathieu. "Gas effect on the emission and detection of the backscattered electrons in a VP-SEM at low energy." Ultramicroscopy 184 (January 2018): 17–23. http://dx.doi.org/10.1016/j.ultramic.2017.08.002.

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de Santa Maria, L. C., M. A. S. Costa, L. F. Senna, M. R. Silva, and R. A. Simao. "AFM Characterization of Composite Materials Containing Iron in a Resin Host Based on Styrene and Divinylbenzene." Microscopy and Microanalysis 11, S03 (2005): 166–69. http://dx.doi.org/10.1017/s1431927605051159.

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The development of composite materials containing small metal or metal oxides particles has attracted a great deal of attention for their interesting chemical, physical and magnetic properties, providing their use for several technological applications. However, it is necessary that a complete evaluation of the morphological features of these composite be performed and correlated to the above mentioned properties. Therefore, the aim of this work was to use VP-SEM and AFM to investigate the morphology and the phase difference of composite materials based on styrene (STY) and divinylbenzene (DVB

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Azura, A. Rashid, and Muhamad Afiq Misman. "The Effect of Addition of Polysaccharide Materials on the Morphology of Freeze Fracture Surface of Natural Rubber Latex Films." Solid State Phenomena 264 (September 2017): 220–23. http://dx.doi.org/10.4028/www.scientific.net/ssp.264.220.

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Sago starch, amylose and amylopectin were used as fillers in natural rubber (NR) latex compounds. The compound was prevulcanized at 80 °C until chloroform number 2-3 was achieved. The effect of the fillers on the NR latex film mechanical properties (tensile properties and tear strength), and crosslink density were obtained. The fractured surface of the films was captured via scanning electron microscope (SEM) Zeiss Supra 35 VP. The results shown the addition of fillers reduced the tensile strength and elongation at break of the NR latex films but increased in the films tear strength. The swell

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Pasanphan, Wanvimol, Thanawat Kasemsankidakarn, Parichart Kongkaoroptham, and Thananchai Piroonpan. "Synthesis of Copper Nanoparticles-polyvinylpyrrolidone Composite Materials Using Simultaneous Irradiation Process." Suan Sunandha Science and Technology Journal 9, no. 2 (2022): 37–47. http://dx.doi.org/10.53848/ssstj.v9i2.232.

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An approach for the synthesis of copper nanoparticles ( CuNPs) embedded in poly ( vinylpyrrolidone) ( PVP) composite materials is proposed using a simultaneous irradiation process. The parameters, i.e., copper sulfate ( CuSO4) precursor, VP and PVP concentrations were optimized for synthesis of CuNPs under irradiation. Crosslinking of PVP system was analyzed by gel fraction and swelling degree using gravimetric measurement. Functionality, chemical composition and crystallinity of the CuNPs-PVP composite materials were characterized by FT-IR, SEM-EDS, XRD. Morphology of the CuNPs-PVP composite

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Da Silva, Rosemar Batista, Giordano Francis Vieira, Letícia Cristina Silva, et al. "Surface Quality Evaluation of Various Metals After Grinding with Aluminum Oxide Grinding Wheel." Journal of Materials and Applications 9, no. 1 (2020): 25–31. http://dx.doi.org/10.32732/jma.2020.9.1.25.

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Different metals can respond differently when grinding using the same abrasive grinding wheel, especially in terms of surface quality. In this context, this work aims give a contribution to the metalworking industry by presenting the results of surface finishing after grinding the following metals: VP Atlas steel grade, Gray Cast Iron and two superalloys, Inconel 718 and Ti-6Al-4V. Tests were performed with the aluminum oxide grinding wheel and with following parameters: cutting speed of 37.6 m/s and workspeed of 10 m/min. Two values of depth of cut (15 μm and 30 μm) were tested. The surface r

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Tóth, Enikő, and Péter Csatár. "A strukturális és a szintaktikailag jelöletlen fókusz interpretációjának összehasonlító elemzése." Jelentés és Nyelvhasználat 5, no. 1 (2018): 159–80. http://dx.doi.org/10.14232/jeny.2018.1.7.

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Tanulmányunkban egy percepciós kísérlet eredményét mutatjuk be, amely során a strukturális, illetve a szintaktikailag jelöletlen fókusz (tág VP fókusz) értelmezését vizsgáltuk ugyanabban a dizájnban a magyar nyelvben. A résztvevők egy kép-mondat megfeleltetési feladat során, hatfokú Likert-skálán ítélték meg egy kép és egy kiegészítendő kérdésre adott válaszként megjelenő tesztmondat összeillőségét. Eredményeink nem mutattak szignifikáns különbséget a strukturális és a szintaktikailag jelöletlen fókusz interpretációja között a két tesztelt faktor, a kimerítőség és a vártság szempontjából. Egyf

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