Bibliographies thématiques / Spontaneous infiltration

Littérature scientifique sur le sujet « Spontaneous infiltration »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Spontaneous infiltration"

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Yamanobe, Shigeharu, et Jeffrey P. Harris. « Spontaneous Remission in Experimental Autoimmune Labyrinthitis ». Annals of Otology, Rhinology & ; Laryngology 101, no 12 (décembre 1992) : 1007–14. http://dx.doi.org/10.1177/000348949210101208.

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We investigated the time course of hearing impairment and cellular infiltration into the inner ear after systemic sensitization of guinea Pigs with a single intradermal injection of bovine inner ear antigen (IEAg) in complete Freund's adjuvant (CFA). Lymphocytes and polymorphonucleocytes appeared mainly in the scala tympani on days 7 to 14, and in addition there was thickening and cellular infiltration of the round window membrane at day 14. These cellular infiltrations resolved after day 28. The auditory brain stem response thresholds from IEAg-sensitized animals were significantly elevated after day 7. Some sensitized animals (n = 5) had spontaneous remissions after day 28; however, the hearing thresholds did not completely recover. These results demonstrate that experimental autoimmune labyrinthitis can be induced by a single inoculation of IEAg-CFA and that remission, as evidenced by clearing of the cochlear cellular infiltration and improved hearing thresholds, can occur spontaneously.
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Jelínek, P., et P. Kantor. « Spontaneous infiltration of broadleaved species into a spruce monoculture left without tending ». Journal of Forest Science 52, No. 1 (8 janvier 2012) : 37–43. http://dx.doi.org/10.17221/4485-jfs.

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An experimental stand was established as a monoculture by planting Norway spruce on a clear-felled area in 1925. In 1958, a research thinning experiment was established there. Control plots and the study of their development without anthropic interventions are of interest in particular. The spruce monoculture nearly disintegrated and the stand-forming role was taken over by species which occurred there originally as admixed ones. The stand became sparser and it was associated with the spontaneous regeneration of broadleaves. Out of the eight control plots three plots were selected differing significantly in stocking and extent of natural regeneration. The development of regeneration was studied in detail on these plots. The undergrowth consisted of 24 woody species in a total number of <br />6,000 individuals per hectare and about two thirds of them belonged to trees. The results of the study show a possibility to convert a spruce monoculture to a broadleaved commercial forest using the spontaneous regeneration of trees.
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Amagai, Ryo, Taku Fujimura, Yumi Kambayashi, Sadanori Furudate, Yota Sato, Kayo Tanita, Akira Hashimoto et Setsuya Aiba. « Keratoacanthoma Centrifugum Marginatum with Spontaneous Regression and Its Possible Differential Diagnosis ». Case Reports in Oncology 11, no 3 (24 octobre 2018) : 671–75. http://dx.doi.org/10.1159/000493089.

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Keratoacanthoma centrifugum marignatum (KCM) is a rare variant of keratoacanthoma, which is characterized by the dense infiltration of inflammatory cells throughout the dermis, especially around the keratinocytic islands. Therefore, it is sometimes difficult to differentiate between KCM and cutaneous T-cell lymphomas. In this report, we describe a case of KCM with spontaneous regression that showed dense infiltration of CD3+CD8+ T cells. Our present case suggested the importance of investigating tumor-infiltrating lymphocytes to avoid the misdiagnosis of KCM as cutaneous T-cell lymphoma.
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Xi, X. M., L. M. Xiao et X. F. Yang. « The mechanism of spontaneous infiltration of Al–Si alloy into SiC preform in air ». Journal of Materials Research 11, no 4 (avril 1996) : 1037–44. http://dx.doi.org/10.1557/jmr.1996.0130.

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Rapid, spontaneous infiltration can be achieved by dipping a SiC preform that contains pyrolyzed carbon into an Al–Si alloy bath in an open air environment. The mechanism for infiltration is investigated in the present work by studying the effects of several relevant parameters on the infiltration process. Experimental results have shown that the requirements for rapid spontaneous infiltration are an infiltration temperature higher than 1400 °C, the presence of a pyrolyzed carbon, and the presence of SiC particle in the preforms. The concentration of Si in the alloy does not have significant influence on the infiltration rate, but it strongly affects the resulting microstructures in the infiltrated composites.
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Zhang, Kuo, Zhong Qi Shi, Gui Wu Liu et Guan Jun Qiao. « SiC/Cu Composite Prepared by Spontaneous Infiltration of Copper Alloy into Porous SiC Ceramic ». Materials Science Forum 814 (mars 2015) : 569–73. http://dx.doi.org/10.4028/www.scientific.net/msf.814.569.

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A porous SiC ceramic reinforced copper-matrix composite was fabricated by spontaneous infiltration of molten Cu-24at%Si alloy into the reinforcement. The influence of process parameters on the infiltration behavior and microstructure of the as-prepared SiC/Cu composite investigations showed that infiltration temperature had an important influence on the infiltration behavior, and higher infiltration temperature which decreased the viscosity of molten Cu-24Si was beneficial to the penetration. Besides, the degree of infiltration increased with the increase of dwelling time at 1600°C. SiC particles were bonded together by sintering additives to form the porous reinforcement, which can be maintained after spontaneous infiltration. The interfacial bond between SiC and Cu-24Si alloy was tight, and no obvious interfacial reaction layer was observed in the as-prepared composite.
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Hilden, J. L., et K. P. Trumble. « Spontaneous Infiltration of Non-Cylindrical Porosity : Large Pores ». Materials Science Forum 308-311 (mai 1999) : 157–62. http://dx.doi.org/10.4028/www.scientific.net/msf.308-311.157.

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Wang, Hongbao, Zechao Tao, Xiangfen Li, Xi Yan, Zhanjun Liu et Quangui Guo. « Graphite fiber/copper composites prepared by spontaneous infiltration ». Applied Surface Science 439 (mai 2018) : 488–93. http://dx.doi.org/10.1016/j.apsusc.2018.01.035.

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Nakae, H., et Y. Hiramoto. « Spontaneous Infiltration of Al Melts into SiC Preform ». International Journal of Metalcasting 5, no 2 (avril 2011) : 23–28. http://dx.doi.org/10.1007/bf03355469.

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Gonzalez, Eduardo J., et Kevin P. Trumble. « Spontaneous Infiltration of Alumina by Copper-Oxygen Alloys ». Journal of the American Ceramic Society 79, no 1 (janvier 1996) : 114–20. http://dx.doi.org/10.1111/j.1151-2916.1996.tb07888.x.

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Maeda, Shingo, Tomoki Motegi, Aki Iio, Kenjiro Kaji, Yuko Goto-Koshino, Shotaro Eto, Namiko Ikeda et al. « Anti-CCR4 treatment depletes regulatory T cells and leads to clinical activity in a canine model of advanced prostate cancer ». Journal for ImmunoTherapy of Cancer 10, no 2 (janvier 2022) : e003731. http://dx.doi.org/10.1136/jitc-2021-003731.

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BackgroundTargeting regulatory T cell (Treg) infiltration is an emerging strategy for cancer immunotherapy. However, its efficacy in advanced prostate cancer remains unclear. Here, we showed the therapeutic efficacy of anti-Treg treatment in a canine model of advanced prostate cancer.MethodsWe used dogs with naturally occurring prostate cancer to study the molecular mechanism underlying Treg infiltration and the effect of anti-Treg treatment. Tumor-infiltrating Tregs was evaluated by immunohistochemistry, and the association with prognosis was examined in dogs with spontaneous prostate cancer. The molecular mechanism of Treg infiltration was explored by RNA sequencing and protein analyses. A non-randomized canine clinical trial was conducted to define the therapeutic potential of anti-Treg treatment for advanced prostate cancer. Human prostate cancer datasets were analyzed to compare gene expression in dogs and humans.ResultsTumor-infiltrating Tregs were associated with poor prognosis in dogs bearing spontaneous prostate cancer. RNA sequencing and protein analyses showed a possible link between the CCL17–CCR4 pathway and the increase of tumor-infiltrating Tregs. Dogs with advanced prostate cancer responded to mogamulizumab, a monoclonal antibody targeting CCR4, with decreased circulating Tregs, improved survival, and low incidence of clinically relevant adverse events. Urinary CCL17 concentration and BRAFV595E mutation were independently predictive of the response to mogamulizumab. Analysis of a transcriptomic dataset of human prostate cancer showed that the CCL17–CCR4 axis correlated with Foxp3. In silico survival analyses revealed that high expression of CCL17 was associated with poor prognosis. Immunohistochemistry confirmed that tumor-infiltrating Tregs expressed CCR4 in human patients with prostate cancer.ConclusionsAnti-Treg treatment, through CCR4 blockade, may be a promising therapeutic approach for advanced prostate cancer in dogs and some population of human patients.
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Thèses sur le sujet "Spontaneous infiltration"

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Chen, Huiqiang 1967. « Fabrication of magnesium matrix composites using a spontaneous infiltration technique ». Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79222.

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A new process was developed to fabricate particulate metal matrix composites (MMCs). The process involves two steps: (1) forming a particulate porous compact, and (2) introducing molten magnesium or magnesium alloy (AZ91) into the channel network by a spontaneous infiltration technique.
A uniform distribution of SiC particulates in magnesium matrix was achieved. Microsegregation existed in composites when the particle size of reinforcement was 38 mum and 22 mum, however, when the particle size of reinforcement was 12 mum, the microsegregation was eliminated.
The interfacial reaction between SiC and Mg studied by Scanning Electron Microscopy (SEM), microanalysis, and X-Ray Diffraction (XRD) techniques showed that, Mg reacted with Si or SiO2 to form Mg2Si, Mg 2Si was present at the surface of SiC after precipitation, resulting in improved wettability between Mg and SiC. As a result of this interfacial reaction, the infiltration process became spontaneous. The infiltration process was related to the infiltration temperature, SiC particle size and matrix chemistry. Increasing the infiltration temperature, decreasing the particle size of SiC resulted in more successful infiltration.
Mechanical testing conducted on composites revealed that the hardness and Ultimate Tensile Strength (UTS) of composites increased with the decrease of particle size of SiC and corresponded to an increase of the volume fraction of SiC.
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SERRA, FERNANDO ANTONIO RIBEIRO. « DEVELOPMENT OF A METAL MATRIX COMPOSITE BY SPONTANEOUS INFILTRATION : IMAGE ANALYSIS TO ESTIMATE THE PERMEABILITY OF THE CERAMIC PREFORM AND MATHEMATICAL MODELING OF THE METALLIC PHASE INFILTRATION ». PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4726@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
A utilização de compósitos de matriz ferrosa com pré-forma cerâmica oferece a possibilidade de redução do desgaste abrasivo em aplicações onde as ligas usuais não são efetivas. Nesta tese, foi desenvolvido um estudo voltado para a obtenção de um compósito de matriz metálica com ênfase na caracterização e previsão da infiltração espontânea de um ferro fundido nodular através de uma préforma granulada porosa de óxido de alumínio. O processo de infiltração de pré-forma porosa constituída de óxido de alumínio, em três granulometrias distintas (12#, 16# e 42#), por um ferro fundido nodular de composição eutética (3,9 graus Celsius) foi realizado em três temperaturas de vazamento diferentes (1403 graus Celsius, 1299 graus Celsius e 1250 graus Celsius), desde a elaboração das pré-formas passando pela infiltração do metal, até a caracterização microestrutural. Os resultados dos ensaios de compressão com as pré-formas foram processados por análise fatorial e mostraram que, dentro dos níveis estudados, o percentual utilizado de ligante (silicato de sódio) e o tempo de cura influenciam positivamente e de forma mais significativa do que a granulometria do óxido de alumínio. A microestrutura da matriz foi afetada pelos grãos cerâmicos da préforma, fato este caracterizado pela presença de veios de grafita no lugar de nódulos em uma extensão variável entre 10 micrômetros e 60 micrômetros a partir da superfície do grão. Após a permeabilidade da pré-forma cerâmica ter sido estimada por processamento digital de imagens em 3D, foi desenvolvido um modelo matemático voltado para a identificação da penetração máxima da fase metálica levando em consideração as temperaturas de vazamento e de solidificação do ferro fundido. As curvas do modelo mostraram boa correlação quando comparados com os resultados experimentais.
Iron metal matrix composites in aluminium oxide offers an outstanding possibility to reduce abrasive wear where usual alloys are not working well. For the present study the composite was obtained by carrying out an spontaneous infiltration of an eutectic (3,9 degrees Celsius) nodular iron in a preform made with three aluminiun oxide granulometries (#12, #16 and #42), in three different pouring temperatures (1403 degrees Celsius, 1299 degrees Celsius e 1250 degrees Celsius). The preforms compression tests results were processed by factorial analysis and showed a greater influence of the sodium silicate amount and the curing time over the aluminium oxide granulometry. After the estimation of the ceramic phase permeability by 3D image digital processing it was developed a mathematical model to predict the maximum infiltration of the ferrous melt through the ceramic phase. It was based on the pouring and alloy solidification temperatures and produced a good agreement with the experimental results. The matrix microstructure was affected by the ceramic grains. This was characterized by the presence of lamellar graphite instead of the expected nodules in an extension between 10 micrometers and 60 micrometers from the border of the composite.
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PILLAI, Vinoshene. « Intravital two photon clcium imaging of glioblastoma mouse models ». Doctoral thesis, Scuola Normale Superiore, 2021. http://hdl.handle.net/11384/109211.

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Nasery, Hesam. « Fabrication of AlN-MgO-MgAl2O4 ceramic composite by spontaneous reactive infiltration ». Thesis, 2008. http://spectrum.library.concordia.ca/975845/1/MR40916.pdf.

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Aluminum nitride ceramics are in high demand in electronic industries as substrate materials for applications requiring high thermal conductivity. Sintering and hot pressing are the most common processing methods used to make dense AlN ceramics. However, all methods of AlN sintering involve high temperatures and long times. Therefore, it is an expensive material. Removing oxygen, as a main impurity of aluminum nitride, by a low cost method in order to achieve dense and high thermal conductivity aluminum nitride ceramics has been pursued for many years. A pressureless infiltration technique at low (650-950°C) temperature was developed to fabricate aluminum nitride-based ceramic matrix composites. The process involves forming a particulate porous compact of non-sintered aluminum nitride and introducing magnesium alloy into the channel network by spontaneous infiltration in a nitrogen atmosphere. Magnesium oxide and spinel phase (MgAl 2 O 4 ) were formed in-situ, when nitrogen gas was used. Densification, thermal properties, and microstructure of the products have been studied. Microstructural, phase, and chemical analysis show that AlN-MgO-MgAl 2 O 4 ceramic composites can be fabricated successfully. Metallic phases were not observed in the samples fabricated at higher than 800°C and electrical conductivity results show that they are insulators. Thermal diffusivity and heat capacity have been measured using nano-flash and differential scanning calorimetry techniques, respectively. Thermal conductivity results are strongly influenced by the residual porosity. Maximum thermal conductivity and density at room temperature were measured to be 95.88 W/m.K and 2.451 g/cm 3 , respectively
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ZHAO, ZU-YI, et 趙祖怡. « Activities of lymphokine activated killer cells and tumor infiltrating lymphocytes in a spontaneously developed murine mammary tumor model ». Thesis, 1989. http://ndltd.ncl.edu.tw/handle/89791955658418591181.

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Chapitres de livres sur le sujet "Spontaneous infiltration"

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Schamm, S., J. P. Rocher et R. Naslain. « Physicochemical Aspects of the K2ZrF6 Process Allowing the Spontaneous Infiltration of SiC (or C) Preforms by Liquid Aluminium ». Dans Developments in the Science and Technology of Composite Materials, 157–63. Dordrecht : Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1123-9_21.

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Gousmine, Mokrane, Djamel Miroud, Mohamed Farid Benlamnouar, Boualeme Demri et Abderrahmane Younes. « Study of Composite with Metallic Matrix WC/W2C–20W–20Ni Realized by Spontaneous Infiltration of the Bronze Alloy Cu–30Mn–3P ». Dans Lecture Notes in Mechanical Engineering, 365–74. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41468-3_30.

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Zhou, Taomo. « Pribumi Perceptions of the “Chinese Problem” ». Dans Migration in the Time of Revolution, 97–114. Cornell University Press, 2019. http://dx.doi.org/10.7591/cornell/9781501739934.003.0006.

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This chapter assesses how the Indonesian government conducted surveillance of Chinese communities. It demonstrates that, with the advance of the Cold War in Asia, the Indonesian authorities interpreted the ethnic Chinese's oftentimes spontaneous political activism as a systematic infiltration led by Beijing. Some anti-Communist pribumi elites saw Beijing as a strong external power intervening in Indonesian politics and ignored its waning ability to rein in the factional infighting in the Chinese community. Moreover, despite a huge variation in ideological inclinations and economic status among the ethnic Chinese, the pribumi elites tended to treat them as a monolithic group that was simultaneously Communist and capitalist. In 1959, under the pretext of reducing economic stratification, the Indonesian government suspended noncitizen Chinese retailers' business activities in rural areas and legitimized the takeover of foreign enterprises by indigenous merchants.
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Dickson, Melissa. « The Magical Metropolis ». Dans Cultural Encounters with the Arabian Nights in Nineteenth-Century Britain, 108–40. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474443647.003.0004.

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This chapter turns to the science of stagecraft, and to the endless recreations and adaptations of the wonders, magic, and treasures of the Arabian Nights that took place within the shows culture of nineteenth-century Britain. These authorless, ownerless tales presented ideal theatrical opportunities to display the rich landscapes, domestic interiors and dazzling treasures of the East within the public spaces of Britain. In so doing, they facilitated a kind of ‘virtual’ tourism, whereby audiences might participate in the adventurer’s narrative of discovery, infiltration, exploration, and safe return, without ever leaving England. At the same time, however, such performances fostered a self-reflective, inward movement, as an imaginative destination of childhood became a physical space that might be stepped into, examined and explored. Performances of the Arabian Nights had a disturbing capacity to evoke and to disrupt childhood memories, as they were reliant upon a substantial amount of labour and technical expertise in order to realise fully the workings of magic and the apparently spontaneous eruption of the supernatural on stage. As a vehicle for exploring the material and technological limits of nineteenth-century stagecraft, the wonder and enchantment of the Arabian Nights thus became inextricably intertwined with the wonder of machinery and technical ingenuity, as new techniques were developed for representing fantasy and manufacturing magic.
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Curry, Nicola, et Susie Shapiro. « Thrombocytopenia and disorders of platelet function ». Dans Oxford Textbook of Medicine, sous la direction de Chris Hatton et Deborah Hay, 5520–32. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0545.

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The platelet is the smallest circulating blood cell. In health, it plays a vital role in haemostasis, and in disease contributes to problems of bleeding and/or thrombosis. The number of platelets produced is under tight homeostatic control, regulated by the cytokine thrombopoietin. A normal platelet count lies within the range 150 to 450 × 109/litre. Thrombocytopenia is defined as a reduction in the number of circulating platelets to fewer than the normal reference range (typically <150 × 109/litre). Spontaneous bleeding is uncommon unless the platelet count falls below 10 to 20 × 109/litre or unless there is abnormal platelet function. Thrombocytopenia can be classified according to three main pathologies: (1) increased platelet destruction, (2) reduced platelet production, and (3) increased platelet sequestration. Disorders of increased platelet destruction may be immune mediated or nonimmune. Primary immune thrombocytopenia (ITP) is an acquired disorder affecting both adults and children, characterized by an isolated thrombocytopenia (platelet count <100 × 109 /litre) for which no precipitant can be found. Primary ITP is a diagnosis of exclusion. Corticosteroids are the main first-line therapy for adult ITP, commonly prednisolone. Nonimmune causes of platelet destruction include microangiopathic haemolytic disorders such as thrombotic thrombocytopenic purpura, haemolytic uraemic syndrome, and disseminated intravascular coagulation. Decreased platelet production—most cases are acquired, with common or important causes being toxins (drugs, alcohol), nutritional deficiencies (folate or vitamin B12), bone marrow infiltration, and myelodysplastic syndrome. Disorders of platelet distribution and platelet sequestration include splenomegaly and hypersplenism, haemodilution, and extracorporeal circulation. Disorders of platelet function are usually acquired. The most common causes are medications and toxins, systemic disorders, and haematological diseases. Congenital disorders are a rare cause of symptomatic bleeding.
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Webb, D. K. H. « Histiocytoses ». Dans Oxford Textbook of Medicine, 4361–66. Oxford University Press, 2010. http://dx.doi.org/10.1093/med/9780199204854.003.220407.

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The histiocytoses are characterized by the infiltration of affected tissues with cells of monocyte/macrophage lineage. Langerhans’ cell histiocytosis—may present with (1) disease affecting a single organ—typically skin (rash) or bone (pain and soft tissue swelling, or asymptomatic radiographic lesions); or (2) multisystem disease—characteristic features include ear discharge, diabetes insipidus, and lung involvement (diffuse micronodular shadowing on chest radiography, with progression to cyst formation and a honeycomb lung appearance). Diagnosis requires identification of Langerhans’ cells within lesional inflammatory cell infiltrate, with demonstration of either the CD1a surface antigen on immunohistochemistry or the presence of Birbeck granules on electron microscopy. Most cases eventually resolve spontaneously. Immunosuppressive and/or cytotoxic drugs are given when there is progressive organ injury, but the most effective and least toxic approach to treatment is not known....
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Mahoney, Ewing. « Surveillance Methods ». Dans MI5, the Cold War, and the Rule of Law, 93–129. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198818625.003.0005.

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This chapter examines the surveillance methods used by the MI5. It is a curious feature of MI5’s mandate that it included nothing about the methods to be used for the purposes of the defence of the realm, which was its core task. The Security Service would obtain information about individuals and organizations in a number of ways, which might be described as volunteers who spontaneously reported fellow citizens; monitoring by Special Branch, infiltration, and the use of informers; watching and following; interrogation and questioning; and the interception of communications (mail, telegrams, and telephones); as well as the use of secret microphones hidden in various locations; and foreign security and intelligence agencies. The chapter also looks at the different circumstances in which these different forms of surveillance were used: a contrast between routine and intense surveillance; between passive and active surveillance; and between constant and periodic surveillance.
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Actes de conférences sur le sujet "Spontaneous infiltration"

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Latukhin, E. I., E. R. Umerov et A. P. Amosov. « Combustion Synthesis of Ti3AlC2 Porous Skeleton with Spontaneous Infiltration by Aluminum Melt for Ti3AlC2-Al Cermet Preparation ». Dans 2021 International Scientific and Technical Engine Conference (EC). IEEE, 2021. http://dx.doi.org/10.1109/ec52789.2021.10016882.

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Amosov, Aleksandr, Evgeny Amosov, Evgeny Latukhin, Petr Kichaev et Emil Umerov. « Producing TiC-Al Cermet by Combustion Synthesis of TiC Porous Skeleton with Spontaneous Infiltration by Aluminum Melt ». Dans 2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE). IEEE, 2020. http://dx.doi.org/10.1109/efre47760.2020.9241903.

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Velasco-Lozano, Moises, et Matthew Thomas Balhoff. « Modeling of Chemical Tracers to Estimate Oil Volume Contacted and Sweep Efficiency in Porous Media Under Countercurrent Spontaneous Imbibition ». Dans SPE Improved Oil Recovery Conference. SPE, 2022. http://dx.doi.org/10.2118/209382-ms.

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Abstract Modeling of chemical tracers is an important technique to estimate oil saturation in porous media. Although numerous models exist to analyze the flow of tracers in systems under dynamic conditions, modeling in capillarity-dominated systems has not been sufficiently examined. In tight porous media and the matrix of fractured reservoirs, spontaneous imbibition (SI) represents a key driving mechanism for fluid infiltration because the low permeability in these systems results in a negligible transport by advection. We present a new semi-analytical solution for the flow of tracers under countercurrent SI valid during the infinite-acting and boundary-dominated flow regimes. The model presented is derived from the analysis of fluid imbibition driven by capillarity and numerically solved as a function of water distribution and initial tracer concentration. We model ideal and partitioning tracers to investigate the average oil saturation in the contacted region by tracer and sweep efficiency of countercurrent SI as a recovery mechanism in porous media. To verify the applicability of our solution, we compared it against numerical simulation cases under flow conditions with diverse solute and phase properties. The concentration profiles exhibit a significant delay in displacement behind the imbibition front when hydrodynamic dispersion is ignored and for high partitioning coefficients, demonstrating the importance of determining these properties before conducting a field test. The solution presented is the first to examine countercurrent SI for the modeling of oil volume contacted by tracers in porous media. We consider the model can be extended for the analysis of the flow of tracers in systems such as fractured reservoirs to estimate oil saturation in the matrix medium, and those using chemical solutions that promote SI by altering wettability and capillary pressure.
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Latukhin, E. I., E. R. Umerov et A. P. Amosov. « Preparation of Ti3 SiC2-Sn Cermet by the Combustion Synthesis of Ti3 SiC2 Porous Skeleton with Subsequent Spontaneous Infiltration by Tin Melt ». Dans 2021 International Scientific and Technical Engine Conference (EC). IEEE, 2021. http://dx.doi.org/10.1109/ec52789.2021.10016803.

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De Caterina, WALL R., D. Giannessi, G. Lazzerini, A. Mazzone, A. Azzara et F. Mosca. « 5-LIPOOXYGENASE ACTIVITY IN THE HUMAN VESSEL WALL ». Dans XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643944.

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5-lipooxygenase products have been identified from a variety of cells and may play a role in the progression of atherosclerosis and in its clinical manifestations (spasm, thrombosis). We investigated whether human vascular fragments, freshly obtained at surgery, are able to produce leukotriene (LT) B4, a definite end product of 5-lipooxygenase, provided with biological activity. Fragments obtained from human saphenous veins (n=21) or aorta (fibrous plaques, n=15, atheromas, n=16) were incubated in buffer at 37°C with mechanical agitation sequentially in the absence (15 min) and in the presence (15 min) of 10 jjM calcium ionophore A-23187. At the end of each incubation, the buffer was sampled to be assayed by a specific radioimmunassay (RIA) for LTB4 (sensitivity 4.3+0.9 pg). Validation of the assay was performed by comparison with a chemotactic bioassay in Boyden chambers, by interpolation of a standard curve evaluating the chemotactic response of neutrophils to a standard LTB4 preparation. RIA resulted the only practicable method to detect concentrations lower than 2.5 ng/ml, compared both to bioassay and to HPLC, all three performed in the incubation media from 8 vascular fragments. Incubations were also performed in a chamber with selective exposure of the endothelial surface in order to detect possible production of LTB4 on the luminal site of the vessel. Both unstimulated and ionophore-stimulated LTB4 were higher (P< 0.01) in atheromas (2.7±1.2 and 6.3±1.8) than in fibrous plaques (0.51±0.22 and 1.19±0.38) or saphenous veins (0.74±0.34 and 3.07±1.39) (ng/g wet weight, mean±SD). Detectable spontaneous and stimulated LTB4 productions were also found in the incubation media of the chamber with atheromas (40±14 and 324±85 pg/cm2 area, respectively). Histology of the fragments confirmed a higher cellularity (macrophages, atherocytes) in atheromas as compared to fibrous plaques and veins. The human vascular wall is a definite site of 5-lipooxygenase activity, possibly arising from white cell infiltration. LTB4 production, able to reach the inner vessel surface and the blood stream, is a possible factor in the progression of the lesion by increasing vascular permeability or recruiting white blood cells.
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Ellwanger, Juber Mateus, Caio Bertolini, Samuel Cavalcante Reis, Daniela Takito et Priscila Ribas. « RECURRENT INFILTRATING DUCTAL CARCINOMA IN LEFT MASTECTOMY PLASTRON DURING PREGNANCY : A CASE REPORT ». Dans Scientifc papers of XXIII Brazilian Breast Congress - 2021. Mastology, 2021. http://dx.doi.org/10.29289/259453942021v31s1080.

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Introduction: Breast cancer has the highest incidence, prevalence, and mortality rate among malignant neoplasms in women worldwide (excluding non-melanoma skin cancer). Although there are well-defined treatments, they are still controversial during pregnancy: surgery seems safe and chemotherapy (CT) poses no harm to the fetus, especially if applied late in pregnancy. Hormone therapy (HT) and radiation therapy (RT) are prone to cause fetal damage. In patients diagnosed with pregnancy during treatment, there are no clear procedures about terminating the pregnancy or ceasing CT and RT. In these cases, it is necessary to monitor the patient and the fetus taking into account the woman’s will - especially if the tumor has estrogen and progesterone receptors, increasing the chance of relapsing or stop responding to CT. This study reports a case in which the hormones of pregnancy influenced a major recurrence of breast cancer, which diminished shortly after the birth. Case report: A 35-year-old woman, diagnosed with infiltrating ductal carcinoma in the left breast, underwent sectorectomy, axillary lymph nodes excision, and RT with an insufficient response. Subsequently, left tumor recurrence arose and mastectomy was performed. In the follow-up, she underwent CT and RT, with poor response. In the interim, it was discovered that the patient was pregnant, thus referred from oncology to gynecology for the interruption, since there was a considerable recurrence in the left breast plastron. Sixth -times pregnant, with five vaginal deliveries, the latest one six years before, all pregancies without complications. She was advised to terminate pregnancy but remained adamant in maintaining the pregnancy. She underwent an obstetric ultrasound showing a viable fetus of six weeks and six days of gestational age (GA). At 22 weeks of pregnancy, she was referred to the hospital by the oncologist for the interruption, as the plastron on the left breast was growing, with CT failure. The patient acknowledged that, with this GA, the fetus’s chance of survival was low. Yet, she opted for pregnancy continuation. Later she was sent by the prenatal care to the maternity hospital at 32 weeks of GA, aiming at delivery and a new CT protocol afterwards. She started corticosteroids for pulmonary development of the conceptus and endured cesarean delivery with bilateral adnexectomy. Female newborn, 1.830g, 8/9 APGAR score and 32 weeks and 5 days Capurro, transferred to the neonatal ICU (intensive care unit) due to prematurity. The patient was evaluated few months after delivery: great spontaneous resolution of the plastron in the left breast, with no effect of pregnancy hormones and responsive to CT. Follow-up in the oncology department.
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Kataoka, Kuniyoshi. « Poetics through Body and Soul : A Plurimodal Approach ». Dans GLOCAL Conference on Asian Linguistic Anthropology 2019. The GLOCAL Unit, SOAS University of London, 2019. http://dx.doi.org/10.47298/cala2019.4-1.

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In this presentation, I will show that various multimodal resources—such as utterance, prosody, rhythm, schematic images, and bodily reactions—may integratively contribute to the holistic achievement of poeticity. By incorporating the ideas from “ethnopoetics” (Hymes 1981, 1996) and “gesture studies” (McNeill 1992, 2005), I will present a plurimodal analysis of naturally occurring interactions by highlighting the interplay among the verbal, nonverbal, and corporeal representations. With those observations, I confirm that poeticity is not a distinctive quality restricted to constructed poetry or “high” culture, but rather an endowment to any kind of natural discourse that is co-constructed by various semiotic resources. My claim specifically concerns a renewed interest in an ethnopoetic kata ‘form/ shape/ style/ model’ embraced as performative “habitus” among Japanese speakers (Kataoka 2012). Kata, in its broader sense, is stable as well as versatile, often serving as an organizational “template” for performance, which at opportune moments may change its shape and trajectory according to ongoing developments. In other words, preferred structures are not confined to an emergent management of performance, but should also incorporate culturally embedded practices with immediate (re)actions. In order to promote this claim, I explore a case in which mutually coordinated performance is extensively pursued for sharing sympathy and camaraderie. Such a kata-driven construction was typically observed in a highly involved, interactional interview about the Great East Japan Earthquake, in which both interviewer and interviewee were recursively oriented and attuned to the same rhythmic and organizational pattern consisting of an odd-number of kata. Based on these observations, I argue that indigenous principles of organizing discourse are as crucial as the mechanisms of conversational organization, with the higher-order, macro cultural preferences inevitably infiltrating into the micro management of spontaneous talk.
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