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Artículos de revistas sobre el tema "Peig"

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Autor: Grafiati

Publicado: 26 de julio de 2024

Última modificación: 27 de julio de 2024

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1

Sala-Sanahuja, Joaquim. "Uma hipótese baudelairiana". Revista de Estudos Literários 11 (9 de noviembre de 2021): 375–90. http://dx.doi.org/10.14195/2183-847x_11_14.

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Com base em alguns indícios, formula-se a hipótese de que um conhecido industrial e financeiro dos anos 1920, Platão Aymamí Peig (ou Plató Peig Aymamí), muito influente em Portugal, foi o modelo do conto O Banqueiro Anarquista (1922) de Fernando Pessoa. Ou ainda mais: o “banqueiro” de Pessoa pode ter sido a síntese de duas personagens homónimas, dois Plató Peig, um financeiro, o outro anarquista, e primos entre si. De qualquer forma, a figura de Plató Peig estabeleceria a relação desta narrativa puramente abstrata, de “raciocínio”, com o ambiente lisboeta em que Pessoa se desenvolveu.

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2

Levin, Dov H. "Partisan electoral interventions by the great powers: Introducing the PEIG Dataset". Conflict Management and Peace Science 36, n.º 1 (19 de septiembre de 2016): 88–106. http://dx.doi.org/10.1177/0738894216661190.

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Recent studies indicate that partisan electoral interventions, a situation where a foreign power tries to determine the election results in another country, can have significant effects on the election results in the targeted country as well as other important influences. Nevertheless, research on this topic has been hindered by a lack of systematic data of electoral interventions. In this article, I introduce the Partisan Electoral Intervention by the Great Powers dataset (PEIG), which provides data on all such interventions by the US and the USSR/Russia between 1946 and 2000. After describing the dataset construction process, I note some interesting patterns in the data, a few of which stand in contrast to claims made about electoral interventions in the public sphere and give an example of PEIG’s utility. I then describe some applications of PEIG for research on electoral interventions in particular and for peace research in general.

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3

Casemiro, Ítalo De Paula, Bruno Francisco Teixeira Simões, Camila Maria dos Santos Moraes, Natália Talita Araújo Nascimento y Gustavo Yuho Endo. "Percepções sobre Um Paraíso – Uma Análise a partir do Olhar do Visitante do Parque Estadual da Ilha Grande (PEIG) e de seus Atrativos". REVISTA ACADÊMICA OBSERVATÓRIO DE INOVAÇÃO DO TURISMO 17, n.º 2 (8 de octubre de 2023): 92–123. http://dx.doi.org/10.61564/raoit.v17n2.7492.

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Destinos turísticos remetem a diversas representações e imagens em seus visitantes, sendo que, as diferentes experiências que cada visitante terá serão determinantes para o estabelecimento das percepções sobre os atrativos visitados. A presente pesquisa de cunho descritivo com abordagem mista e fundamentada na teoria das representações sociais objetivou apreender as representações de visitantes sobre alguns dos principais atrativos da região do Parque Estadual da Ilha Grande (PEIG), localizado no litoral do Estado do Rio de Janeiro. A pesquisa analisou 4885 avaliações on-line sobre as experiências de visitantes do PEIG disponibilizadas no site TripAdvisor entre os anos de 2015 e 2020, com o auxílio da Classificação Hierárquica Descendente através do software IRaMuTeQ. Os resultados revelam que o olhar do visitante, de modo geral, é um olhar positivo, revelando a centralidade da oferta de serviços, formas de acesso e dos elementos que compõem o cenário natural de cada atrativo, destacando-se elementos únicos destes. Os resultados demonstram que neste destino de natureza, as experiências dos turistas são centradas num posicionamento contemplativo, demonstrando um envolvimento cognitivo marginal com o ambiente natural.

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4

Laoire, Lillis Ó. "Peig Sayers: Níl Deireadh Ráite/not the final word". Folk Life 59, n.º 1 (2 de enero de 2021): 74–75. http://dx.doi.org/10.1080/04308778.2021.1899479.

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5

Shea, Thomas F. "Peig Sayers: Religious Subversions, Covert Withholdings, and Undaunted Mettle". ABEI Journal 14 (17 de noviembre de 2012): 89. http://dx.doi.org/10.37389/abei.v14i0.3613.

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6

Ferreguetti, Atilla C., Amanda B. M. de Oliveira, Bruno C. Pereira, Ricardo T. Santori, Lena Geise y Helena G. Bergallo. "Encounter rate and behavior of Alouatta guariba clamitans in the Ilha Grande State Park, Rio de Janeiro state, Brazil". Zoologia 37 (7 de abril de 2020): 1–10. http://dx.doi.org/10.3897/zoologia.37.e36846.

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Alouatta guariba clamitans Cabrera, 1940 is an endemic species of the Atlantic Forest that occurs from south Bahia, Brazil, extending south to the province of Misiones, Argentina. In Rio de Janeiro state, the species was classified as threatened, indicating that attention is needed for the conservation of this taxon. Additionally, an outbreak of yellow fever spread throughout the southeastern states of Brazil from January 2017 until March 2018 seriously threatening Rio de Janeiro populations of the species. Herein, we aimed to provide the first estimates of A. g. clamitans encounter rate, density, and population size in the Ilha Grande State Park (PEIG), which is part of the Atlantic Forest biome of Brazil. Data were collected in two different periods, the first between December 2003 and May 2005, and the second from August 2009 to May 2010, and information on encounter rates and behavior was collected to better understand aspects of species' ecology. The estimated encounter rate in the first period through the distance sampling method was 0.04 ± 0.01 individuals per kilometer. Nine groups were recorded in the second period of the study, with 47 individuals along 3 km. Our estimates of encounter rate, density and population size were low and reinforces the need to initiate species monitoring and assess the impact that yellow fever outbreaks may have on PEIG populations. The results presented here can be a starting point to support future strategic actions for the species, to measure impacts and to the management of the species, and for a conservation program.

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7

Almqvist, Bo. "The Scholar and the Storyteller Heinrich Wagner's Collections from Peig Sayers". Béaloideas 72 (2004): 31. http://dx.doi.org/10.2307/20520850.

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8

Schofield, Linley R., Amy K. Beattie, Catherine M. Tootill, Debjit Dey y Ron S. Ronimus. "Biochemical Characterisation of Phage Pseudomurein Endoisopeptidases PeiW and PeiP Using Synthetic Peptides". Archaea 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/828693.

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Pseudomurein endoisopeptidases cause lysis of the cell walls of methanogens by cleaving the isopeptide bond Ala-ε-Lys in the peptide chain of pseudomurein. PeiW and PeiP are two thermostable pseudomurein endoisopeptidases encoded by phage ΨM100 ofMethanothermobacter wolfeiand phages ΨM1 and ΨM2 ofMethanothermobacter marburgensis, respectively. A continuous assay using synthetic peptide substrates was developed and used in the biochemical characterisation of recombinant PeiW and PeiP. The advantages of these synthetic peptide substrates over natural substrates are sensitivity, high purity, and characterisation and the fact that they are more easily obtained than natural substrates. In the presence of a reducing agent, purified PeiW and PeiP each showed similar activity under aerobic and anaerobic conditions. Both enzymes required a divalent metal for activity and showed greater thermostability in the presence of Ca2+. PeiW and PeiP involve a cysteine residue in catalysis and have a monomeric native conformation. The kinetic parameters,KMandkcat, were determined, and theε-isopeptide bond between alanine and lysine was confirmed as the bond lysed by these enzymes in pseudomurein. The new assay may have wider applications for the general study of peptidases and the identification of specific methanogens susceptible to lysis by specific pseudomurein endoisopeptidases.

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9

Li, Min, Li Guang Xiao y Hong Kai Zhao. "Morphology of Polyethylene/Montmorillonite Nanocomposites Prepared by In Situ Polymerization". Applied Mechanics and Materials 457-458 (octubre de 2013): 244–47. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.244.

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Polyethylene/montmorillonite (PE/MMT) nanocomposites were prepared by in situ polymerization. The morphology of MMT/MgCl2/TiCl4 catalyst and PE/MMT nanocomposites was investigated by scanning electron microscopy (SEM). It can be seen that MMT/MgCl2/TiCl4 catalyst remained the original MMT sheet structures and many holes were found in MMT and the morphology of PE/MMT nanocomposites is part of the sheet in the form of existence, as most of the petal structure. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were carried out to characterize all the samples. XRD results reveal that the original basal reflection peak of PEI1 and PEI2 disappears completely and that of PEI3 become very weak. MMT/MgCl2/TiCl4 catalyst was finely dispersed in the PE matrix. Instead of being individually dispersed, most layers were found in thin stacks comprising several swollen layers.

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10

Mori, Consuelo, Ángel G. Valdivieso, Mariángeles Clauzure, María M. Massip-Copiz, María Á. Aguilar, Eduardo G. A. Cafferata y Tomás A. Santa Coloma. "Identification and characterization of human PEIG-1/GPRC5A as a 12-O-tetradecanoyl phorbol-13-acetate (TPA) and PKC-induced gene". Archives of Biochemistry and Biophysics 687 (julio de 2020): 108375. http://dx.doi.org/10.1016/j.abb.2020.108375.

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11

Sahiner, Mehtap, Aynur Sanem Yilmaz, Sahin Demirci y Nurettin Sahiner. "Physically and Chemically Crosslinked, Tannic Acid Embedded Linear PEI-Based Hydrogels and Cryogels with Natural Antibacterial and Antioxidant Properties". Biomedicines 11, n.º 3 (25 de febrero de 2023): 706. http://dx.doi.org/10.3390/biomedicines11030706.

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Linear polyethyleneimine (L-PEI) was obtained from the acidic hydrolysis of poly(2-ethyl-2-oxazoline) and employed in the synthesis of physically crosslinked L-PEI hydrogel, PC-L-PEIH, chemically crosslinked L-PEI hydrogel, CC-L-PEIH, and cryogels, CC-L-PEIC. The preparation of L-PEI-based hydrogel networks was carried out in two ways: 1) by cooling the L-PEI solution from 90 °C to room temperature, and 2) by crosslinking L-PEI chains with a crosslinker, glycerol diglycidyl ether = 20 °C for CC-L-PEIC. Furthermore, a polyphenolic compound, tannic acid (TA), with superior antibacterial, antioxidant, and anti-inflammatory properties as an active biomedical functional agent, was encapsulated during the synthesis process within L-PEI-based hydrogels and cryogels, at 10% and 25% (w/w) based on the L-PEI amount. A linear and higher TA release was observed from physically crosslinked PEI-based hydrogels containing 10% and 25% TA-containing PC-L-PEI/TAH within 6 h, with 9.5 ± 05 mg/g and 60.2 ± 3.8 mg/g cumulative released amounts, respectively. A higher antioxidant activity was observed for 25% TA containing PC-L-PEI/TAH with 53.6 ± 5.3 µg/mL total phenol content and 0.48 ± 0.01 µmole Trolox equivalent/g. The minimum bactericidal concentration (MBC) of PC-L-PEIH and CC-L-PEIC networks against both E. coli (ATCC 8739) and Gram-positive B. subtilis (ATCC 6633) bacteria was determined at 5 mg/mL, whereas the MBC value of 10 mg/mL for CC-L-PEIH networks against the same bacteria was achieved.

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12

Janovics, Kata, Balázs Soós, Zsuzsanna Gurdán, Ana Esther Pacheco, Edina Lempel, Ágnes Bán y József Szalma. "A pre-eruptív intrakoronális reszorpció előfordulása és jelentősége bölcsességfogak esetében". Fogorvosi Szemle 116, n.º 3 (14 de septiembre de 2023): 120–26. http://dx.doi.org/10.33891/fsz.116.3.120-126.

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Bevezetés: A pre-eruptív intrakoronális reszorpció (PEIR) a koronális fogszövetek jól körülírható radiolucens léziója.Célunk volt megállapítani a PEIR prevalenciáját az impaktált alsó bölcsességfogak körében, valamint meghatározni azesetleges terápiás döntést befolyásoló szerepét.Vizsgálati anyag és módszer: Retrospektív vizsgálatunkban 6775 betegből 20 beteg 21 PEIR elv áltozást mutatóbölcsességfoga került bevonásra. Demográfiai adatokat gyűjtöttünk, valamint ortopantomogram-elemzést végeztünk.Eredmények: A nemek aránya 0,67 (8 férfi, 12 nő) volt, 31 ± 25 év átlagéletkorral. Alsó bölcsességfogat érintő PEIRa betegek 0,3%-ában (21/6775) volt látható, ami az összes PEIR 30,9%-a (21/68) volt. A léziók 28,6%-a volt előrehaladott(6/21), és ezen fogak 66,7%-ánál láttunk pulpaérintettséget (4/6). Előrehaladott PEIR esetén a betegek szignifikánsanidősebbek voltak (p = 0,0128, Mann-Whitney-teszt). Az esetek 47,6%-ában találtunk ektópiát (10/21), 9 esetben (42,9%)pedig rotációt. A PEIR-ek 19%-a fokozott idegsérülési rizikóval (4/21) párosult, előrehaladott lézió esetént (≥ 7-es osztályzat)66,7%-ban volt felismerhető magas rizikót jósló specifikus panorámaröntgen radiológiai jelkombináció (4/6).Következtetések: A PEIR jelenléte és karakterisztikája módosíthatja és meghatározhatja eseteink követésének ütemezését,vagy befolyással lehet a terápiás döntéseinkre.

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13

Visweswaran, Ganesh Ram R., Bauke W. Dijkstra y Jan Kok. "Two Major Archaeal Pseudomurein Endoisopeptidases: PeiW and PeiP". Archaea 2010 (2010): 1–4. http://dx.doi.org/10.1155/2010/480492.

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PeiW (UniProtKB Q7LYX0) and PeiP (UniProtKB Q77WJ4) are the two major pseudomurein endoisopeptidases (Pei) that are known to cleave pseudomurein cell-wall sacculi of the members of the methanogenic ordersMethanobacterialesandMethanopyrales. Both enzymes, originating from prophages specific for some methanogenic archaeal species, hydrolyze the (Ala)-Lys bond of the peptide linker between adjacent pseudomurein layers. Because lysozyme is not able to cleave the pseudomurein cell wall, the enzymes are used in protoplast preparation and in DNA isolation from pseudomurein cell-wall-containing methanogens. Moreover, PeiW increases the probe permeability ratio and enables fluorescence in situ hybridization (FISH) and catalyzed reporter deposition (CARD-) FISH experiments to be performed on these methanogens.

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14

Dinçer, Sevil, Mustafa Türk, Ayşe Karagöz y Gürhan Uzunalan. "Potentialc-mycAntisense Oligonucleotide Carriers: PCl/PEG/PEI and PLL/PEG/PEI". Artificial Cells, Blood Substitutes, and Biotechnology 39, n.º 3 (2 de agosto de 2010): 143–54. http://dx.doi.org/10.3109/10731199.2010.506852.

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15

SMOTROVA, E. A. y O. V. TULINOVA. "ИСПОЛЬЗОВАНИЕ ЭКСТЕРЬЕРНЫХ ИНДЕКСОВ В КАЧЕСТВЕ КРИТЕРИЕВ ОТБОРА БЫКОВ-ПРОИЗВОДИТЕЛЕЙ *". Molochnoe i miasnoe skotovodstvo, n.º 6 (23 de octubre de 2019): 12–17. http://dx.doi.org/10.33943/mms.2019.6.39669.

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Проведены исследования линейной оценки признаков экстерьера первотелок айрширской породы (n572), являющихся дочерьми 21 быка, на основании которых рассчитаны индексы композиции вымени (UDC) и качества конечностей (FLC), полифакторные индексы ПЭИ2 и ПЭИ6, коэффициент ранговой корреляции Спирмена между используемыми индексами и племенной ценностью быков по удою (ПЦВСКП). Отсутствие достоверной связи между UDC и FLC с ПЦВСКП препятствует улучшению экстерьера потомков при отборе по внутристадной оценке. Достоверно высокая взаимосвязь выявлена между UDC и финальной оценкой экстерьера, индексами ПЭИ2 и ПЭИ6 0,745, 0,706 и 0,710, соответственно. В процессе моделирования алгоритмов отбора быковпроизводителей установлено, что с введением 25ного отбора быков по ПЦВСКП вместе с увеличением самой оценки на 155 кг достоверно (P0,001) повышается индекс ПЭИ2 на 48 (P0,001), а при отборе 10 производителей на 247 кг и 81 при P0,001, соответственно. В результате отбора по ПЭИ2 получены высокие и достоверные селекционные дифференциалы (P0,001) по удою 430 кг, финальной оценке 0,67 баллов, индексу ПЭИ2 102, а также по внутристадной племенной ценности 108 кг. При моделировании двух вариантов отбора по UDC и FLC проведена сверка 5 лучших быков, при которой выявлено, что дочери производителей Лабри и Носто по сравнению со сверстницами при потере продуктивности на 115 кг достоверно улучшают показатели вымени на 0,3 (P0,05), конечностей на 1,1 (P0,001) и финальную оценку на 1,0 балл (P0,001).Studies were carried out on a linear assessment of the exterior first calving cows of Ayrshire breed (n572), which are the daughters of 21 bulls, on the basis of which the UDC and FLC, the productively exterior indices PEI2 and PEI6, the Spearmans rank correlation coefficient between the indices and the intraherd breeding value (BVin) bulls was calculated. Improvement of the exterior in the selection of assessments due to the lack of reliable correlation between the UDC and FLC with the BVin. A reliable high correlation was found between the UDC and the final assessment of the exterior, the indices PEI2 and PEI6 0.745, 0.706 and 0.710, respectively. It was found that with the selection of 25 of bulls, the assessment itself increases by 155 (P0.001) and the PEI2 increases significantly by 48 (P0.001), while selecting 10 of bulls by 247 and 81 (P 0.001) respectively. The selection of PEI2 gave high and reliable breeding differentials (P0.001) for a yield of 430 kg, for a final assessment of 0.67 points, for the PEI2 102, for BVin 108. In the selection by UDC and FLC 25 of bulls were identified: Labry and Nosto. The daughters of these bulls with a loss of milk yield by 115 kg reliably improve the udder by 0.3 (P0.05), feet and legs by 1.1 (P0.001) and the final assessment by 1.0 point (P0.001).

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Lee, Sang Cheon, Hak Soo Choi, Tooru Ooya y Nobuhiko Yui. "Block-Selective Polypseudorotaxane Formation in PEI-b-PEG-b-PEI Copolymers via pH Variation". Macromolecules 37, n.º 20 (octubre de 2004): 7464–68. http://dx.doi.org/10.1021/ma048666r.

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17

Choi, Hak Soo, Sang Cheon Lee, Kaori Yamamoto y Nobuhiko Yui. "Block-Selective Movement of α-Cyclodextrins in Polyrotaxanes of PEI-b-PEG-b-PEI Copolymer". Macromolecules 38, n.º 23 (noviembre de 2005): 9878–81. http://dx.doi.org/10.1021/ma051400f.

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18

Bergstrand, Anna, Ghazal Rahmani‐Monfared, Åsa Östlund, Magnus Nydén y Krister Holmberg. "Comparison of PEI‐PEG and PLL‐PEG copolymer coatings on the prevention of protein fouling". Journal of Biomedical Materials Research Part A 88A, n.º 3 (3 de marzo de 2008): 608–15. http://dx.doi.org/10.1002/jbm.a.31894.

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Velluto, Diana, Susan N. Thomas, Eleonora Simeoni, Melody A. Swartz y Jeffrey A. Hubbell. "PEG-b-PPS-b-PEI micelles and PEG-b-PPS/PEG-b-PPS-b-PEI mixed micelles as non-viral vectors for plasmid DNA: Tumor immunotoxicity in B16F10 melanoma". Biomaterials 32, n.º 36 (diciembre de 2011): 9839–47. http://dx.doi.org/10.1016/j.biomaterials.2011.08.079.

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20

TROFIN, PAUL y TITUS ADRIAN BEU. "Hyperbranched PEI-PEG/DNA Polyplex Formation: A Molecular Dynamics Study". Romanian Journal of Physics 68, n.º 9-10 (15 de diciembre de 2023): 618. http://dx.doi.org/10.59277/romjphys.2023.68.618.

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"PEGylated PEIs are intensely studied non-viral vectors for gene delivery, having high transfection efficiencies. Using all-atom molecular dynamics simulations, the interaction of hyperbranched polyethylenimine polyethylene glycol (HPEI-PEG) with DNA was investigated for different number of PEG chains per HPEI core, and, to this end, a new CHARMM Force Field for PEG was developed. The obtained force field parameters are validated by the good agreement of structural measures, such as the radius of gyration, with experimental evidence. The reported investigations reveal an upper bound for the PEG fraction in the modelled HPEI-PEG polymers. The addition of PEG reduces cytotoxicity, increases solubility, while still ensuring a high efficiency of forming polyplexes with DNA. Useful correlations between the copolymer structure and polyplex properties are observed, along with insights on the dynamics of the formation of hydrogen bonds between the HPEI core and DNA."

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21

Zhou, Quan, Xiangzhi Liu, Wei Luo, Jun Shen, Yuefeng Wang y Dapeng Wei. "The interface modification for GNWs/Si Schottky junction with PEI/PEIE interlayers". Materials Research Express 5, n.º 3 (28 de marzo de 2018): 035605. http://dx.doi.org/10.1088/2053-1591/aab471.

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22

Yang, Gao, Weiqiong Ma, Baolin Zhang y Qi Xie. "The labeling of stem cells by superparamagnetic iron oxide nanoparticles modified with PEG/PVP or PEG/PEI". Materials Science and Engineering: C 62 (mayo de 2016): 384–90. http://dx.doi.org/10.1016/j.msec.2016.01.090.

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23

Choi, Hak Soo, Tooru Ooya y Nobuhiko Yui. "One-Pot Synthesis of a Polyrotaxane via Selective Threading of a PEI-b-PEG-b-PEI Copolymer". Macromolecular Bioscience 6, n.º 6 (16 de junio de 2006): 420–24. http://dx.doi.org/10.1002/mabi.200600024.

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24

Höbel, Sabrina, Chantal C. M. Appeldoorn, Pieter J. Gaillard y Achim Aigner. "Targeted CRM197-PEG-PEI/siRNA Complexes for Therapeutic RNAi in Glioblastoma". Pharmaceuticals 4, n.º 12 (16 de diciembre de 2011): 1591–606. http://dx.doi.org/10.3390/ph4121591.

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25

Lin, Yu-Ling, Chia-Hung Chen, Yen-Ku Liu, Tse-Hung Huang, Nu-Man Tsai, Shey-Cherng Tzou y Kuang-Wen Liao. "Lipo-PEG-PEI complex as an intracellular transporter for protein therapeutics". International Journal of Nanomedicine Volume 14 (febrero de 2019): 1119–30. http://dx.doi.org/10.2147/ijn.s188970.

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26

Kapusuz Yavuz, Derya. "Exploring the structure of RNA-incorporated PEG/PEI modified silica network". Materials Chemistry and Physics 279 (marzo de 2022): 125779. http://dx.doi.org/10.1016/j.matchemphys.2022.125779.

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27

Kim, S. K., D. Josell y T. P. Moffat. "Electrodeposition of Cu in the PEI-PEG-Cl-SPS Additive System". Journal of The Electrochemical Society 153, n.º 9 (2006): C616. http://dx.doi.org/10.1149/1.2216356.

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28

CAI, JIANLING, NING HUANG y YONG ZHANG. "SYNTHESIS OF POLYSTYRENE ENCAPSULATEDZnS-COATEDCdSeNANOCOMPOSITES MODIFIED WITH PLL–PEI–PEG–FA". International Journal of Nanoscience 04, n.º 02 (abril de 2005): 229–35. http://dx.doi.org/10.1142/s0219581x05003097.

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Current cell tags using dyes lose their luminescence quickly and are not suitable for optical barcoding. Semiconductor quantum dots (QDs), on the other hand, can be engineered to emit different wavelengths, thus permitting tagging of various cells at the same time. Core/shell luminescent quantum dots, cadmium selenide ( CdSe ) and zinc sulphide ( ZnS ), were synthesized and incorporated into polystyrene (PS) particles grafted with carboxyl groups using microemulsion polymerization method. Highly luminescent monodispersed PS particles with diameters from 30 nm to 50 nm were chosen for subsequent surface modification. Two series of surface modifications were carried out with PS particles. One was modified with poly(L-Lysine) (PLL), polyethylenimine (PEI), Poly(Ethylene Glycol) (PEG) and folic acid (FA) side chains in sequence through chemical bonding. Another was conjugated with PEG and FA in sequence. The folic acid side chains can enter target cells via folate receptors and assisted in the uptake of the luminescent particles into the cells. This property allows them to be used as fluorescent labels for marking their ingress into cells and also for a cornucopia of biomedical applications.

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29

Lee, Kyung-Man, Yong-Bok Lee y In-Joon Oh. "Evaluation of PEG-Transferrin-PEI Nanocomplex as a Gene Delivery Agent". Journal of Nanoscience and Nanotechnology 11, n.º 8 (1 de agosto de 2011): 7078–81. http://dx.doi.org/10.1166/jnn.2011.4863.

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30

Jwameer, Marwa R., Sabah A. Salman, Farah T. M. Noori, Ghassan M. Sulaiman, Majid S. Jabir, Khalil A. A. Khalil, Elsadig M. Ahmed y Mohamed T. A. Soliman. "Antiproliferative Activity of PEG-PEI-SWCNTs against AMJ13 Breast Cancer Cells". Journal of Nanomaterials 2023 (8 de febrero de 2023): 1–8. http://dx.doi.org/10.1155/2023/2855788.

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Single-walled carbon nanotubes (SWCNTs) involving polyethylene glycol (PEG) and polyethyleneimine (PEI), which contain amines, were produced and analyzed using X-ray diffraction (XRD), UV–vis spectroscopy, Raman spectroscopy (RS), and transmission electron microscopy (TEM) for the spectral and structural analyses of PEG-PEI-SWCNTs. PEG-PEI-SWCNTs demonstrated peaks using UV–vis spectroscopy at 300.98 nm, have a broad peak at 2θ = 23.51, linked to 002 with d-spacing (3.7816), and have crystalline sizes of 8.48 nm. In PEG-PEI-SWCNTs, TEM images demonstrated the accumulation of SWCNTs with PEG-PEI due to an increased main grain size with functionalization to 80.68 nm. The D and G bands in PEG-PEI-SWCNTs moved to 1,292 and 1,586 cm−1, respectively. SWCNTs are observed as a bundle of inhomogeneous, long-curved accumulates containing multitudes of tubes. The PEG-PEI-SWCNTs have a tubular structure that demonstrates particles scattered alongside the carbon nanotube sidewalls, which indicate that PEG and PEI are conjugated to the SWCNTs. Cytotoxicity evaluation of PEG-PEI-SWCNTs (6.25–100 µg/mL) in the breast cancer AMJ13 cell line was conducted for 24 and 72 hr, and the results showed enhanced toxicity to the tumor cells and decreased cytotoxicity against rhabdomyosarcoma (RD) normal cells.

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31

Zhang, Yanbo, Ruiyan Li, Wenzheng Wu, Yun’an Qing, Xiongfeng Tang, Wenli Ye, Zhiyong Zhang y Yanguo Qin. "Adhesion and Proliferation of Osteoblast-Like Cells on Porous Polyetherimide Scaffolds". BioMed Research International 2018 (27 de noviembre de 2018): 1–7. http://dx.doi.org/10.1155/2018/1491028.

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The purpose of this work was to investigate the porous polyetherimide scaffold (P-PEIs) as an alternative biopolymer for bone tissue engineering. The P-PEIs was fabricated via solvent casting and particulate leaching technique. The morphology, phase composition, roughness, hydrophilicity, and biocompatibility of P-PEIs were evaluated and compared with polyetherimide (PEI) and Ti6Al4V disks. P-PEIs showed a biomimetic porous structure with a modulus of 78.95 ± 2.30 MPa. The water contact angle of P-PEIs was 75.4 ± 3.39°, which suggested that P-PEIs had a wettability surface. Moreover, P-PEIs provides a feasible environment for cell adhesion and proliferation. The relative cell adhesion capability and the cell morphology on P-PEIs were better than PEI and Ti6Al4V samples. Furthermore, the MC3T3-E1 cells on P-PEIs showed faster proliferation rate than other groups. It was revealed that the P-PEIs could be a potential material for the application of bone regeneration.

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32

Al-Tuwirqi, Amani y W. Kim Seow. "A Controlled Study of Pre-Eruptive Intracoronal Resorption and Dental Development". Journal of Clinical Pediatric Dentistry 41, n.º 5 (1 de enero de 2017): 374–80. http://dx.doi.org/10.17796/1053-4628-41.5.374.

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Aim: To compare the prevalence of PEIR in Australian and Saudi Arabian children and to investigate the relationship of PEIR with dental development. Study design: Panoramic (PAN) radiographs of 842 Australian and 456 Saudi children were screened for PEIR. The dental ages of the children with and without PEIR were assessed from the PAN radiographs using the method of Demirjian and co-workers. Results: The subject prevalence of PEIR was not statistically significant between Australian (2%) and Saudi children (0.6%) (p>0.1). The teeth most commonly affected by PEIR were the mandibular second molars and premolars. Dental impaction was observed in 31% of teeth with PEIR compared to only 0.1% of control teeth (p<0.0001). Children with PEIR showed a mean delay in dental development of 0.54±0.85 years compared with ageand gender-matched controls (p<0.0001). Conclusions: The present study provides the first evidence that there are no differences in PEIR prevalence between Australian and Saudi populations, and that dental development is significantly delayed in children with PEIR.

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33

Ben Hamouda, Sofiane y Sadok Roudesli. "Transport properties of PVA/PEI/PEG composite membranes: sorption and permeation characterizations". Open Chemistry 6, n.º 4 (1 de diciembre de 2008): 634–40. http://dx.doi.org/10.2478/s11532-008-0053-0.

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AbstractPoly(vinylalcohol)/poly(ethyleneglycol)/poly(ethyleneimine) blend membranes were prepared by solution casting followed by solvent evaporation. The chemical structure of the prepared membranes was analyzed by FTIR and DSC. The sorption behavior as well as the permeabilities of the membranes for pure CO2 and N2 were investigated. The results show that the PVA/PEI/PEG membranes possess a higher permeability of CO2 and a lower permeability of N2. The membrane displays a CO2 permeability of 27 Barrer, and a N2 permeability of 3 Barrer at 25°C and 1 bar. CO2 sorption behavior of the composite membrane, which can be classified as a dual-mode sorption model, and N2 sorption behavior of the copolymeric membrane is in agreement with the Fickian diffusion model.

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34

Cao, Yixiang, Shiyin Zhang, Ming Ma y Yu Zhang. "Fluorinated PEG-PEI Coated Magnetic Nanoparticles for siRNA Delivery and CXCR4 Knockdown". Nanomaterials 12, n.º 10 (16 de mayo de 2022): 1692. http://dx.doi.org/10.3390/nano12101692.

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CXC chemokine receptor 4 (CXCR4) is a promising therapeutic target. Previous studies have shown that intracellular delivery of siRNA to knockdown CXCR4 expression in cancer cells is an effective therapeutic strategy. To prepare efficient magnetic nucleic acid carriers, it is now necessary to improve the endocytosis efficiency of PEGylated magnetic nanoparticles. In our work, Heptafluorobutyryl-polyethylene glycol-polyethyleneimine (FPP) was first prepared and then used to coat magnetic nanoparticles (MNPs) to obtain magnetic nanocarriers FPP@MNPs. The materials were characterized by 19 F-Nuclear Magnetic Resonance (NMR), transmission electron microscope (TEM), energy dispersive spectroscopy (EDS), and dynamic light scattering (DLS). The biosecurity of FPP@MNPs was confirmed by cell viability and apoptosis experiments. Cellular uptake of FPP@MNPs and siRNA transfection enhanced by external magnetic fields were detected by fluorescence microscopy, confocal laser microscopy, and flow cytometry. The results show that the cellular uptake efficiency of FPP@MNPs was significantly improved, and transfection efficiency reached more than 90%. The knockdown of CXCR4 on the 4 T1 cell membrane was confirmed by real-time polymerase chain reaction (RT-PCR) and flow cytometry. In conclusion, the fluorinated cationic polymer-coated magnetic nanoparticles FPP@MNPs can be loaded with siRNA to reduce CXCR4 expression as well as be expected to be efficient universal siRNA carriers.

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35

Papa, Anne-Laure, Julien Boudon, Vanessa Bellat, Alexis Loiseau, Harender Bisht, Fadoua Sallem, Rémi Chassagnon, Véronique Bérard y Nadine Millot. "Dispersion of titanate nanotubes for nanomedicine: comparison of PEI and PEG nanohybrids". Dalton Transactions 44, n.º 2 (2015): 739–46. http://dx.doi.org/10.1039/c4dt02552k.

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Titanate nanotubes represent a carrier of interest for drug, imaging agent or DNA delivery because of their (i) morphology, (ii) high specific surface area and (iii) tuneable surface, functionalized by PEG or PEI herein.

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36

Dal-Cin, Mauro M., K. Darcovich, Sundar Saimani y Ashwani Kumar. "Gas separation transport modeling for PDMS coatings on PEI-PEG IPN membranes". Journal of Membrane Science 361, n.º 1-2 (septiembre de 2010): 176–81. http://dx.doi.org/10.1016/j.memsci.2010.05.059.

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37

Tian, HuaYu, Chao Deng, Hao Lin, Jingru Sun, Mingxiao Deng, Xuesi Chen y Xiabin Jing. "Biodegradable cationic PEG–PEI–PBLG hyperbranched block copolymer: synthesis and micelle characterization". Biomaterials 26, n.º 20 (julio de 2005): 4209–17. http://dx.doi.org/10.1016/j.biomaterials.2004.11.002.

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38

Saqafi, Batoul y Fatemeh Rahbarizadeh. "Effect of PEI surface modification with PEG on cytotoxicity and transfection efficiency". Micro & Nano Letters 13, n.º 8 (agosto de 2018): 1090–95. http://dx.doi.org/10.1049/mnl.2017.0457.

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39

Fella, Carolin, Greg F. Walker, Manfred Ogris y Ernst Wagner. "Amine-reactive pyridylhydrazone-based PEG reagents for pH-reversible PEI polyplex shielding". European Journal of Pharmaceutical Sciences 34, n.º 4-5 (agosto de 2008): 309–20. http://dx.doi.org/10.1016/j.ejps.2008.05.004.

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40

Biswal, Bijesh K., Niladri B. Debata y Rama S. Verma. "Development of a targeted siRNA delivery system using FOL-PEG-PEI conjugate". Molecular Biology Reports 37, n.º 6 (9 de octubre de 2009): 2919–26. http://dx.doi.org/10.1007/s11033-009-9853-3.

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41

Sharma, Dinesh Kumar, Rakesh Kumar Srivastava y Prashant Gupta. "Study of stock returns through P/E, PEG and PERG: evidence from Nifty-100". International Journal of Business and Globalisation 36, n.º 1 (2024): 83–96. http://dx.doi.org/10.1504/ijbg.2024.135996.

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42

Shim, Tang Ngee, Catherine A. Harwood, Steven GE Marsh, Frances M. Gotch, Wim Quint, Maurits N. de Koning, Nick Francis et al. "The prevalence of human leucocyte antigen and human papillomavirus DNA in penile intraepithelial neoplasia in England 2011–2012". International Journal of STD & AIDS 32, n.º 5 (12 de febrero de 2021): 388–95. http://dx.doi.org/10.1177/0956462420970727.

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Background: The pathogenesis of penile intraepithelial neoplasia (PeIN) is unclear but human papillomavirus (HPV) infection and polymorphisms in human leucocyte antigen (HLA). Objectives: To examine the prevalence of HPV DNA and HLA in PeIN. Methods: Adult Caucasian men with a clinical and histological diagnosis of PeIN, that is, Bowenoid papulosis (BP), Bowen’s disease of penis (BDP) and erythroplasia of Queyrat (EQ) were selected and phenotyped from the clinical records. DNA was extracted from blood and paraffin-embedded sections for HLA and HPV typing, respectively. Human leucocyte antigen allele frequencies were compared with those derived from the UK–based Caucasian population. Results: Seventy-two cases of PeIN (20 BP, 34 BDP and 18 EQ) were studied. Human papillomavirus DNA was identified in 65/72 (90.2%) PeIN; Alphapapillomavirus types were detected in 62/72 (85%) followed by Betapapillomavirus types in 9/72 (12.5%) and cutaneous types in 7/72 (9.7%); HPV16 was the most prevalent genotype at 35/72 (48.6%) followed by HPV33 at 7/72 (9.7%); multiple infections were seen in 18/72 (25%) PeIN. HLA-C*15 (Bonferroni corrected p = 0.049) confers susceptibility to PeIN, whereas HLA-DQA1*01 (corrected p = 0.02) protects against PeIN. HPV16-associated PeIN cases showed no statistically significant association with HLA genotype after multiple corrections. Conclusion: Human papillomavirus is involved in the pathogenesis of PeIN. Immunogenotype may play a role in the pathogenesis of PeIN.

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Liu, Yunyun, Han Zhang, Anping Peng, Xiaodong Cai, YuZhou Wang, Ke Tang, Xiuqin Wu, Yanran Liang, Limin Wang y Zhong Li. "PEG-PEI/siROCK2 inhibits Aβ42-induced microglial inflammation via NLRP3/caspase 1 pathway". NeuroReport 33, n.º 1 (1 de diciembre de 2021): 26–32. http://dx.doi.org/10.1097/wnr.0000000000001752.

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44

Jeong, Ji Hoon, Sun Hwa Kim, Sung Wan Kim y Tae Gwan Park. "In vivo tumor targeting of ODN-PEG-folic acid/PEI polyelectrolyte complex micelles". Journal of Biomaterials Science, Polymer Edition 16, n.º 11 (enero de 2005): 1409–19. http://dx.doi.org/10.1163/156856205774472335.

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45

Sirsi, Shashank R., Rebecca C. Schray, Xiangying Guan, Nicole M. Lykens, Jason H. Williams, Michelle L. Erney y Gordon J. Lutz. "Functionalized PEG–PEI Copolymers Complexed to Exon-Skipping Oligonucleotides Improve Dystrophin Expression inmdxMice". Human Gene Therapy 19, n.º 8 (agosto de 2008): 795–806. http://dx.doi.org/10.1089/hum.2007.129.

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46

Cui, Qing, Fan Chen, Cun Wei Zhan y Shen Qiang Liu. "Analysis and Countermeasures Research on Planning Environment Impact Assessment (PEIA) of Urban Rail Transit Planning in China". Advanced Materials Research 838-841 (noviembre de 2013): 1281–85. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.1281.

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Based on the analysis and summary of 19 PEIA cases of urban rail transit (URT) planning, this paper pointed out the major problems on PEIA of URT in practice, such as the depth of environmental impact prediction was inadequate, Optimal comments to URT Planning were not operational, and Public Participation was not representative etc. In response to these problems, this paper put forward some suggestions on both of regulating the technical means of PEIA for URT and improving the capacity of PEIA technical personnel. It could be helpful to improve the scientificity and practicity of PEIA for of urban rail transit planning in China.

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47

Rogge, Matthew L. y Ronald L. Thune. "Regulation of the Edwardsiella ictaluri Type III Secretion System by pH and Phosphate Concentration through EsrA, EsrB, and EsrC". Applied and Environmental Microbiology 77, n.º 13 (6 de mayo de 2011): 4293–302. http://dx.doi.org/10.1128/aem.00195-11.

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ABSTRACTA recently describedEdwardsiella ictaluritype III secretion system (T3SS) with functional similarity to theSalmonellapathogenicity island 2 T3SS is required for replication in channel catfish head-kidney-derived macrophages (HKDM) and virulence in channel catfish. Quantitative PCR and Western blotting identified low pH and phosphate limitation as conducive to expression of theE. ictaluriT3SS, growth conditions that mimic the phagosomal environment. Mutagenesis studies demonstrated that expression is under the control of the EsrAB two-component regulatory system. EsrB also induces upregulation of the AraC-type regulatory protein EsrC, which enhances expression of the EscB/EseG chaperone/effector operon in concert with EsrB and induces expression of the pEI1-encoded effector, EseH. EsrC also induces expression of a putative type VI secretion system translocon protein, EvpC, which is secreted under the same low-pH conditions as the T3SS translocon proteins. The pEI2-encoded effector, EseI, was upregulated under low-pH and low-phosphate conditions but not in an EsrB- or EsrC-dependent manner. Mutations of EsrA and EsrB both resulted in loss of the ability to replicate in HKDM and full attenuation in the channel catfish host. Mutation of EsrC did not affect intracellular replication but did result in attenuation in catfish. Although EsrB is the primary transcriptional regulator forE. ictalurigenes within the T3SS pathogenicity island, EsrC regulates expression of the plasmid-carried effectoreseHand appears to mediate coordinated expression of the T6SS with the T3SS.

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48

Luo, Yongneng, Peter Pfister, Thomas Leisinger y Alain Wasserfallen. "Pseudomurein endoisopeptidases PeiW and PeiP, two moderately related members of a novel family of proteases produced inMethanothermobacterstrains". FEMS Microbiology Letters 208, n.º 1 (febrero de 2002): 47–51. http://dx.doi.org/10.1111/j.1574-6968.2002.tb11059.x.

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49

Ahn, Younghyun, Yeonmi Yang, Jaejoon Hwang, Taesung Jeong y Jonghyun Shin. "The Prevalence and Characteristics of Pre-eruptive Intracoronal Radiolucencies in Children and Adolescents". JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 48, n.º 2 (31 de mayo de 2021): 160–67. http://dx.doi.org/10.5933/jkapd.2021.48.2.160.

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The purpose of this study was to investigate the prevalence and characteristics of pre-eruptive intracoronal radiolucencies (PEIR) from panoramic radiographs in Korean children and adolescents.<br/>This study examined panoramic radiographs of 3,000 patients aged between 5 and 14 years old who visited ten dental hospitals in Korea. The age and gender of the patients, the tooth type, the number of intracoronal radiolucent lesions, and the location and size of the lesions were recorded.<br/>The overall prevalence of patients with PEIR was 2.5%. The difference in the presence of PEIR between both genders was not significant. Within each tooth type, the mandibular first molar showed highest prevalence of PEIR (29.6%). The central part of the crown was the most frequently observed location of PEIR (56.8%). The size of the PEIR lesions was mostly limited to less than one-third of the thickness of coronal dentin.

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50

Cañete-Portillo, Sofía, Diego F. Sanchez, María José Fernández-Nestosa, Adriano Piris, Patricia Zarza, Sabrina Oneto, Lorena Gonzalez Stark et al. "Continuous Spatial Sequences of Lichen Sclerosus, Penile Intraepithelial Neoplasia, and Invasive Carcinomas: A Study of 109 Cases". International Journal of Surgical Pathology 27, n.º 5 (7 de enero de 2019): 477–82. http://dx.doi.org/10.1177/1066896918820960.

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Lichen sclerosus (LSc) with penile cancer is found in about two thirds of specimens. It has been hypothesized that LSc represents a precancerous condition. To qualify as such, in addition to cytological atypia and similarity with the invasive tumor, a spatial correlation between LSc and neoplastic lesions needs to be demonstrated. The purpose of this study was to evaluate such a spatial relationship. Circumcision (28 cases) and penectomy (81 cases) specimens were evaluated. All cases had LSc, penile intraepithelial neoplasia (PeIN), and/or invasive squamous cell carcinomas. We examined LSc in relation to invasive carcinoma, PeIN, and normal epithelia. Invasive squamous cell carcinomas, classified according to the World Health Organization criteria as non–human papillomavirus (HPV)-related and HPV-related PeIN, were present in 100 cases. Non-HPV-related (differentiated) PeIN was the most common subtype associated with LSc (89%). There were 5 spatial patterns identified: (1) LSc adjacent to PeIN (23%), (2) LSc adjacent and comprising PeIN (42%), (3) LSc next to and within invasive carcinomas (8%), (4) LSc throughout the sequence PeIN-invasive carcinoma (24%), and (5) LSc was separate (with normal tissue between the lesions) from PeIN and/or invasive carcinomas in a minority of cases (3%). LSc within the cancer was not previously described. In this series, we found 35 cases with LSc within invasive carcinomas. The striking continuous spatial relationship among LSc, PeIN, and/or invasive carcinoma as shown in this study may be a necessary (but not sufficient) condition for the hypothesis postulating LSc as a penile precancerous lesion.

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