4,853 research outputs found

    Temperature Relaxation in Hot Dense Hydrogen

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    Temperature equilibration of hydrogen is studied for conditions relevant to inertial confinement fusion. New molecular-dynamics simulations and results from quantum many-body theory are compared with Landau-Spitzer (LS) predictions for temperatures T from 50 eV to 5000 eV, and densities with Wigner-Seitz radii r_s = 1.0 and 0.5. The relaxation is slower than the LS result, even for temperatures in the keV range, but converges to agreement in the high-T limit.Comment: 4 pages PRL style, two figure

    Griess Test Affection (A and B) by Transmission of Contaminants Inside the Barrel of the Shotgun Brand Benelli Super Nova Model

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    The present investigation arises from the need to investigate and to experiment scientifically if the contaminants established as controlled variable and not contralada can affect performing the procedure described in clause 4 1 of guide 2DC-GU-0024 on performing ballistic testing on weapons firearms pneumatic gas black powder detonating electrical etc and entering ballistic identification systems It can be reasonably inferred that by performing the forty-two tests manipulating solutions A and B of the Griess reagent it is evident that the pollutants transferred to the Interior of the Cannon 4-stroke oil diesel and gasoline do not affect the results for the identification of nitrites Product of combustion during the Shooting phenomenon Case contrary It happens with rainwater since it is observed that the same it affects the elaboration of the test taking into account that without coming into contact with the gunpowder results in a faint pink coloration indicating in a preliminary way that it is Positive for presence of nitrite

    Systemic oncolytic adenovirus delivered in mesenchymal carrier cells modulate tumor infiltrating immune cells and tumor microenvironment in mice with neuroblastoma.

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    Celyvir (autologous mesenchymal cells -MSCs- that carry an oncolytic adenovirus) is a new therapeutic strategy for metastatic tumors developed by our research group over the last decade. There are limitations for studying the immune effects of human oncolytic adenoviruses in murine models since these viruses do not replicate naturally in these animals. The use of xenografts in immunodeficient mice prevent assessing important clinical aspects of this therapy such as the antiadenoviral immune response or the possible intratumoral immune changes, both of tumor infiltrating leukocytes and of the microenvironment. In our strategy, the presence of MSCs in the medicinal product adds an extra level of complexity. We present here a murine model that overcomes many of these limitations. We found that carrier cells outcompeted intravenous administration of naked particles in delivering the oncolytic virus into the tumor masses. The protection that MSCs could provide to the oncolytic adenovirus did not preclude the development of an antiadenoviral immune response. However, the presence of circulating antiadenoviral antibodies did not prevent changes detected at the tumor masses: increased infiltration and changes in the quality of immune cells per unit of tumor volume, and a less protumoral and more inflammatory profile of the tumor microenvironment. We believe that the model described here will enable the study of crucial events related to the immune responses affecting both the medicinal product and the tumor

    Substrato com Organosuper® para formação de mudas de pepineiro em ambientes protegidos e bandejas de poliestireno

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    Culture environments, trays and doses of organic compost were evaluated in the formation of cucumber seedlings (Cucumis sativus L.). Five environmental conditions were tested: (A1) a greenhouse with height of 2.5 m, covered with polyethylene film, (A2) nursery with height of 2.5 m, monofilament fabric, 50% shading, (A3) nursery with height of 2.5 m, heat-reflective screen, 50% shading, (A4) nursery with a height of 1.8 m, covered with coconut tree straw and (A5) greenhouse with height of 4.0 m, covered with polyethylene film, with zenith opening and thermo-reflective cloth under the plastic. Trays of 72 (R1) and 128 (R2) cells were filled with 93% soil and 7% organic compound (S1), 86% soil and 14% organic compound (S2) and 79% soil and 21% organic compound (S3). It was used a randomized design in split-split-plot scheme, with five replicates (environments x trays x substrates). The greenhouses provide the best environments for the formation of cucumber seedlings. A tray of 72 cells is the best container, promoting more vigorous seedlings in substrate with soil and 7 or 14% organic compound.Ambientes de cultivo, bandejas e doses de composto orgânico foram avaliados na formação de mudas de pepino (Cucumis sativus L.). Cinco ambientes de cultivo foram testados: (A1) estufa agrícola com altura de 2,5 m coberta com filme de polietileno; (A2) viveiro com altura de 2,5 m, tela de monofilamento com 50% de sombreamento; (A3) viveiro com altura de 2,5 m, tela termorrefletora, com 50% de sombreamento; (A4) viveiro com altura de 1,8 m, coberto com palha de coqueiro, e (A5) estufa agrícola com altura de 4,0 m, coberta com filme de polietileno, com abertura zenital e tela termorrefletora sob o filme. Bandejas de 72 (R1) e 128 (R2) células foram preenchidas com 93% de solo e 7% de composto orgânico (S1); 86% de solo e 14% de composto orgânico (S2), e 79% de solo e 21% de composto orgânico (S3). Utilizou-se um delineamento inteiramente casualizado, em esquema de parcelas subsubdivididas, com cinco repetições (ambientes x bandejas x substratos). As estufas agrícolas propiciam os melhores ambientes para a formação das mudas de pepino. A bandeja de 72 células é o melhor recipiente, promovendo plântulas mais vigorosas no substrato com solo e 7 ou 14 % de composto orgânico.22623

    Primary immune thrombocytopenia: Experience of a specialised clinic

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    Introduction: Although primary immune thrombocytopenia (ITP) is rare in childhood, it is the most frequent cause of thrombocytopenia. There have been attempts to establish risk factors to predict the progression of the disease in order to optimise its management, which has changed in recent years due to, among other reasons, specialised care. Material and methods: A retrospective, observational and analytical study was conducted on patients diagnosed with ITP over a 3-year period in a Paediatric Haematology specialist clinic. Results: From the epidemiological, clinical and analytical point of view, the characteristics of this group are similar to others. Most of the patients (23/31, 74.2%) had ITP for less than 12 months, with there being no serious complications related to the disease or the treatment received. It was established that risk factors were related to being slowly evolving (lower event free survival (EFS)) with no statistical significance, female gender, age over 10 years, leukopenia absence of initial severe thrombocytopenia, and non-specialised care. The absence of a history of infection was significantly related to a lower EFS. Conclusions: The epidemiological and analytical risk factors for a slowly evolving ITP are the same that described in the literature. Patients treated before the beginning of specialised care also had a lower EFS. These data seem to support the current recommendation that rare diseases should be managed in specialised units. (C) 2019 Published by Elsevier Espana, S.L.U. on behalf of Asociaci6n Espanola de Pediatria. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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