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Autor: Grafiati

Publicado: 29 de julho de 2024

Última modificação: 30 de julho de 2024

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Artigos de revistas sobre o assunto "335.41/1"

Banaszak, Beata. "Assessment of serum concentrations of matrix metalloproteinases-2, -3 and -9, and tissue inhibitor of metalloproteinases-1 in children with primary hypertension". Pediatria i Medycyna Rodzinna 18, n.º 4 (31 de março de 2023): 345–50. http://dx.doi.org/10.15557/pimr.2022.0051.

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Introduction: Primary hypertension is regarded to be a growing health concern in children. The pathogenesis of primary hypertension is multifactorial. The role of altered levels of matrix metalloproteinases has been proposed. In hypertension, metalloproteinases are engaged not only in vascular remodelling but also in activation of vasoconstrictive agents. Aim of the study: We aimed at comparing the serum concentrations of matrix metalloproteinases-2, -3 and -9, and tissue inhibitor of metalloproteinases-1 in children with primary hypertension and normotensive peers. Materials and methods: We surveyed 23 children with primary hypertension, aged 14.75 years (median; interquartile range, IQR 3.66) and 23 normotensive subjects, aged 14.66 years (median; IQR 6.25). Serum concentrations of matrix metalloproteinases-2, -3 and -9, and tissue inhibitor of metalloproteinases-1 were measured using enzyme-linked immunosorbent method, and the scores were compared with Mann–Whitney U test, with the level of significance at p ≤ 0.05. Results: In children with primary hypertension, serum concentration of matrix metalloproteinase-2 [178.1 (IQR: 35.84) vs. 99.9 (IQR: 20.1) ng/mL], -3 [6.47 (IQR: 1.75) vs. 2.67 (IQR: 1.08) ng/mL], -9 [191.1 (IQR: 52.75) vs. 58.34 (IQR: 18.99) ng/mL] and tissue inhibitor of metalloproteinases-1 [863.9 (IQR: 192.9) vs. 335.41 (IQR: 109.99) ng/mL] were significantly higher than in the normotensive controls (p < 0.00001). Matrix metalloproteinase-9/tissue inhibitor of metalloproteinases-1 ratio [0.22 (IQR: 0.1) vs. 0.18 (IQR: 0.05)] was also significantly elevated in the hypertensive participants (p = 0.008). Conclusions: Elevated serum concentrations of matrix metalloproteinases-2, -3 and -9, and tissue inhibitor of metalloproteinases-1 in children with primary hypertension may indicate their role in the development of hypertension and/or on the presence of vascular remodelling at an early stage of the disease.

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Xiao, Chang Run, e Wen Zhao Zhang. "Optimization Research for Receivers Arrangement of LBL Acoustic Positioning System with PSO Algorithm". Applied Mechanics and Materials 333-335 (julho de 2013): 41–44. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.41.

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Three optimization models were proposed according to the problems emerged from self-propelled model test. And the object function to evaluated acoustic positionings precision of some given receivers arrays was created. The genetic algorithm code to solve this optimization problem was developed and validated by optimization model 1 afterwards. The optimum arrangements for model 1 and model 3 were acquired by calculating such code. The cross arrays was certificated to be the optimum ones. One new method to arrange acoustic receivers in self-propelled model test was drafted.

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Yang, Qian, Xiaoguang Shi, Weibang Li, Kaishan Song, Zhijun Li, Xiaohua Hao, Fei Xie et al. "Fusion of Landsat 8 Operational Land Imager and Geostationary Ocean Color Imager for hourly monitoring surface morphology of lake ice with high resolution in Chagan Lake of Northeast China". Cryosphere 17, n.º 2 (1 de março de 2023): 959–75. http://dx.doi.org/10.5194/tc-17-959-2023.

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Abstract. The surface morphology of lake ice remarkably changes under the combined influence of thermal and mechanical forces. However, research on the surface morphology of lake ice and its interaction with climate is scarce. A large-scale linear structure has repeatedly appeared on satellite images of Chagan Lake in recent years. The Geostationary Ocean Color Imager (GOCI), with a 1 h revisit, and Landsat 8 Operational Land Imager (OLI), with a spatial resolution of 30 m, provide the possibility for the study of hourly changes in the large-scale linear structure. We merged the Landsat and GOCI images, using an Enhanced Spatial and Temporal Adaptive Reflectance Fusion Model (ESTARFM), and extracted the lengths and angles of the linear structure. We monitored the hourly changes in the surface morphology during the cold season from 2018 to 2019. The average length of the linear structure in the completely frozen period was 21 141.57 ± 68.36 m. The average azimuth angle was 335.48 ± 0.23∘, nearly perpendicular to the domain wind in winter. Through two field investigations during the two recent cold seasons, we verified the linear structure as being ice fractures and ridges. The evolution of surface morphology is closely associated with air temperature, wind, and shoreline geometry.

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Mallikarjuna, Koduru, Surya Veerendra Prabhakar Vattikuti, Ravi Manne, Gangarapu Manjula, Keelapattu Munirathnam, Srinivas Mallapur, Najat Marraiki et al. "Sono-Chemical Synthesis of Silver Quantum Dots Immobilized on Exfoliated Graphitic Carbon Nitride Nanostructures Using Ginseng Extract for Photocatalytic Hydrogen Evolution, Dye Degradation, and Antimicrobial Studies". Nanomaterials 11, n.º 11 (31 de outubro de 2021): 2918. http://dx.doi.org/10.3390/nano11112918.

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Due to modernization and the scarcity of fossil fuel resources, energy demand is continuously increasing. In this regard, it is essential and necessary to create a renewable energy source that can meet future energy demands. Recently, the production of H2 by water splitting and removing pollutants from the water has been essential for issues of energy and environmental demands. Herein, g-C3N4 and Ag-g-C3N4 composite structures have been successfully fabricated by the ultrasonication method. The physio/photochemical properties of prepared g-C3N4 and Ag-g-C3N4 were examined with different analytical techniques such as FTIR, XRD, UV-DRS, SEM, TEM, PL, and XPS analyses. The silver quantum dots (QDS) anchored to g-C3N4 structures performed the profound photocatalytic activities of H2 production, dye degradation, and antimicrobial activity under visible-light irradiation. The Ag/g-C3N4 composite with an Ag loading of 0.02 mole has an optimum photoactivity at 335.40 μmol g−1 h−1, which is superior to other Ag loading g-C3N4 composites. The synthesized Ag/g-C3N4 nanoparticles showed potential microbial inhibition activity during the preliminary screening, and the inhibition zones were comparable to the commercial antibiotic chloramphenicol. The loading of Ag into g-C3N4 paves the suppression, recombination and transfer of photo-generated electron-hole pairs, leading to the enhancement of hydrogen production, the diminishment of pollutants in water under visible light irradiation, and antimicrobial activity against multidrug-resistant pathogens.

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Leão, Enoque De Sousa, Jacira Neves da Costa Torreão, Marcos Jácome de Araújo, Leilson Rocha Bezerra, Carlo Aldrovandi Torreão Marques, Raimundo Ribeiro Ferreira, Romilda Rodrigues do Nascimento, Bárbara Silveira Leandro e Ricardo Loiola Edvan. "Analysis of the potentiality haying of native forage species in semiarid region". Semina: Ciências Agrárias 38, n.º 5 (3 de outubro de 2017): 3319. http://dx.doi.org/10.5433/1679-0359.2017v38n5p3319.

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The objective of this study was to evaluate the potential hay production from Spiny Amaranth (Amaranthus spinosus), Hairy Woodrose (Merremia aegyptia), Malva (Sida galheirensis), Mucuna (Mucuna pruriens) and Ervanço (Froelichia humboldtiana), native forage species of the semiarid region of Brazil by observing morphological components of the plant, such as the dehydration curve, crude protein loss (CPL) curve, chemical composition of plant and hay and hay degradability in situ. There were differences (P < 0.05) among species on leaf, stem and inflorescence quantification with Ervanço, Hairy Woodrose, and Mucuna having a greater number of leaves. There was a linearly increasing response for the dehydration curve of the five forage plants species. Mucuna forage had the greatest hay point at 800 g kg-1 dried matter (DM) after 11.8 hours and Woodrose had a lower dehydration efficiency, which required 25 hours of sun exposure. There was no difference in CPL. Mucuna had the lowest crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) content, 8.4, 67.7 and 73.8 g kg DM-1 in hay in relation to the plant, respectively. Ervanço, Spiny Amaranth, Hairy Woodrose and Malva hay had more of soluble fraction “a” of DM of 31.0, 26.2, 22.1 and 9.7 g kg-1 DM than Mucuna, respectively. Spiny Amaranth and Malva hay had values of 335.4 and 193.2 g kg-1 DM of fraction “b” more than Ervanço hay, respectively. For fraction “a’’ of CP, Spiny Amaranth and Hairy Woodrose hay obtained 312.6 and 227.4 g kg-1 CP more than that observed for Malva, respectively. Mucuna had better hay potential among the forage studied in the semiarid region of Brazil.

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Blanco-Garavito, Rocio, Polina Astroz, Salomon Yves Cohen e Eric H. Souied. "Influence of Fasting followed by Acute Water Ingestion on Subfoveal Choroidal Thickness in Eyes of Healthy Subjects". Ophthalmology @ Point of Care 1, n.º 1 (janeiro de 2017): oapoc.0000013. http://dx.doi.org/10.5301/oapoc.0000013.

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Purpose To investigate the influence of at least 12 hours of fasting followed by acute water ingestion on macular choroidal thickness in eyes of healthy subjects. Methods Prospective case series study including healthy volunteers from April 1, 2015 to May 31, 2015. Macular choroidal thickness was measured on enhanced depth imaging optical coherence tomography (EDI-OCT) and on swept-source (SS)-OCT after 12 hours of fasting, and 60 minutes after acute water ingestion (750 mL in 5 minutes). Results A total of 52 eyes of 26 healthy volunteers were included in this study. The mean age for participants was 32 years old. After 12 hours of fasting, the mean (±SD) subfoveal choroidal thickness was 335.43 (±104.82) μm on EDI-OCT and 286.16 (±80.32) μm on SS-OCT. The mean (±SD) subfoveal choroidal thickness after acute water intake was 352.32 (±120.36) μm and 290.5 (±85.86) μm, respectively. There was no significant difference between the mean subfoveal thickness at baseline and 60 minutes after acute water ingestion for any of the choroidal imaging techniques (p = 0.1386 for EDI-OCT and p = 0.0659 for SS-OCT). Conclusions These results suggest that choroidal circulation can physiologically quickly adapt to systemic vascular changes in healthy eyes. Choroidal thickness did not depend upon the hydration status for the subjects participating in this study.

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Quach, Y. Nhu, e Ocktaeck Lim. "An Investigation of the Effect of Propylene Gas Flame on Emissions and Temperature Distribution of a Preheated Metal Plate". Sustainability 15, n.º 16 (12 de agosto de 2023): 12306. http://dx.doi.org/10.3390/su151612306.

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This study investigates the effect of the propylene gas flame on the emissions and temperature distribution of the metal plate during the preheating process. Experimental tests were carried out using a preheating system with a cylindrical chamber for emissions measurement and a metal plate placed near the torch head. Emissions were measured using a gas analyzer, while the temperature distribution of the metal plate was measured using an infrared thermal camera and thermocouples. The findings reveal that the emissions decrease as the equivalence ratio is increased as it approaches a ratio of 1. However, when the appropriate equivalence ratio is reached, NOx emissions will rise and then gradually fall. The peak temperature of propane fuel is higher than that of other fuels because of the concentrated flame. Propane fuel can achieve a peak temperature of 347.65 °C, surpassing both propylene fuel (275.45 °C) and acetylene fuel (335.45 °C). Using a propylene gas flame results in a reduction in emissions of carbon monoxide and nitrogen oxides compared to a propane flame. But, acetylene fuel produces the most NOx emissions, reaching 450.79 ppm for the experimental conditions. Additionally, the temperature distribution of the preheated metal plate was more uniform with the propylene gas flame, indicating improved heat transfer. However, the peak temperature of the metal plate was slightly lower when using the propylene gas flame.

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Nazarchuk, Evgeny V., Oleg I. Siidra, Diana O. Nekrasova, Vladimir V. Shilovskikh, Artem S. Borisov e Evgeniya Y. Avdontseva. "Glikinite, Zn3O(SO4)2, a new anhydrous zinc oxysulfate mineral structurally based on OZn4 tetrahedra." Mineralogical Magazine 84, n.º 4 (30 de abril de 2020): 563–67. http://dx.doi.org/10.1180/mgm.2020.33.

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AbstractA new mineral glikinite, ideally Zn3O(SO4)2, was found in high-temperature exhalative mineral assemblages in the Arsenatnaya fumarole, Second scoria cone of the Great Tolbachik Fissure Eruption (1975–1976), Tolbachik volcano, Kamchatka Peninsula, Russia. Glikinite is associated closely with langbeinite, lammerite-β, bradaczekite, euchlorine, anhydrite, chalcocyanite and tenorite. It is monoclinic, P21/m, a = 7.298(18), b = 6.588(11), c = 7.840(12) Å, β = 117.15(3)°, V = 335.4(11) Å3 and R1 = 0.046. The eight strongest lines of the powder X-ray diffraction pattern [d in Å (I) (hkl)] are: 6.969(56)(00$\bar{1}$), 3.942(52)(101), 3.483(100)(00$\bar{2}$), 3.294(49)(020), 2.936(43)(120), 2.534(63)(201), 2.501(63)(20$\bar{3}$) and 2.395(86)(02$\bar{2}$). The chemical composition determined by electron-microprobe analysis is (wt.%): ZnO 42.47, CuO 19.50, SO3 39.96, total 101.93. The empirical formula calculated on the basis of O = 9 apfu is Zn2.07Cu0.97S1.98O9 and the simplified formula is Zn3O(SO4)2. Glikinite is a Zn,Cu analogue of synthetic Zn3O(SO4)2. The crystal structure of glikinite is based on OZn4 tetrahedra sharing common corners, thus forming [Zn3O]4+ chains. Sulfate groups interconnect [Zn3O]4+ chains into a 3D framework.

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Doma, Kenji, e Glen Bede Deakin. "The effects of strength training and endurance training order on running economy and performance". Applied Physiology, Nutrition, and Metabolism 38, n.º 6 (junho de 2013): 651–56. http://dx.doi.org/10.1139/apnm-2012-0362.

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This study examined the acute effect of strength and endurance training sequence on running economy (RE) at 70% and 90% ventilatory threshold (VT) and on running time to exhaustion (TTE) at 110% VT the following day. Fourteen trained and moderately trained male runners performed strength training prior to running sessions (SR) and running prior to strength training sessions (RS) with each mode of training session separated by 6 h. RE tests were conducted at baseline (Base-RE) and the day following each sequence to examine cost of running (CR), TTE, and lower extremity kinematics. Maximal isometric knee extensor torque was measured prior to and following each training session and the RE tests. Results showed that CR at 70% and 90% VT for SR-RE (0.76 ± 0.10 and 0.77 ± 0.07 mL·kg–0.75·m–1) was significantly greater than Base-RE (0.72 ± 0.10 and 0.70 ± 0.11 mL·kg–0.75·m–1) and RS-RE (0.73 ± 0.09 and 0.72 ± 0.09 mL·kg–0.75·m–1) (P < 0.05). TTE was significantly less for SR-RE (237.8 ± 67.4 s) and RS-RE (275.3 ± 68.0 s) compared with Base-RE (335.4 ± 92.1 s) (P < 0.01). The torque during the SR sequence was significantly reduced for every time point following the strength training session (P < 0.05). However, no significant differences were found in torque following the running session (P > 0.05), although it was significantly reduced following the strength training session (P < 0.05) during the RS sequence. These findings show that running performance is impaired to a greater degree the day following the SR sequence compared with the RS sequence.

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Malli, Foteini, Despoina Papakosta, Katerina Antoniou, Maria Dimadi, Vlassis Polychronopoulos, Katerina Malagari, Anastasia Oikonomou, Demosthenes E. Bouros e Zoe Daniil. "Combined pulmonary fibrosis and emphysema characteristics in a Greek cohort". ERJ Open Research 5, n.º 1 (fevereiro de 2019): 00014–2018. http://dx.doi.org/10.1183/23120541.00014-2018.

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BackgroundCombined pulmonary fibrosis and emphysema (CPFE) has recently received great attention, with studies suggesting that it presents a distinct clinical entity while others have challenged this hypothesis. This nationwide study aimed to describe a large cohort of Greek CPFE patients and to examine potential prognostic factors for survival.MethodsThis retrospective study included 97 patients with CPFE. Demographic and clinical data, pulmonary function tests, echocardiography results and bronchoalveolar lavage analysis were recorded.ResultsMost patients were male (94.8%) and 92% were current or ex-smokers. Spirometry results were abnormal (forced vital capacity (FVC) 72.9±19.9% pred and forced expiratory volume in 1 s/FVC 82.9±9.7%) with reduced diffusing capacity of the lung for carbon monoxide (DLCO) (42.3±17.4% pred). Mean systolic pulmonary arterial pressure was 41.9±19.7 mmHg and pulmonary hypertension was present in 58.8% of patients. Mean 6-min walk distance was 335.4±159.4 m. Mean emphysema score was 14.23±8.69% and mean interstitial lung disease (ILD) extent was 39.58±19.82%. Mean survival was 84 months (95% CI 72–96 months). Patients with DLCO ≥39% pred had better survival than patients with DLCO <39% pred (p=0.031). Patients with ILD extent ≥30% had worse survival than patients with ILD extent <30% (p=0.037).ConclusionsOur results indicate that CPFE patients have preserved lung volumes associated with disproportionately reduced DLCO, while reduced DLCO and increased ILD extent was associated with worse prognosis.

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Livros sobre o assunto "335.41/1"

Andrew, Gamble, Marsh David 1946- e Tant Tony, eds. Marxism and social science. Urbana: University of Illinois Press, 1999.

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Marxism and Philosophy Radical Thinkers. Verso, 2013.

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Fred, Halliday. Marxism and Philosophy. Monthly Review Press, 2009.

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An introduction to the three volumes of Karl Marx's Capital. New York: Monthly Review Press, 2012.

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Lukács, Marx, and the sources of critical theory. New York: Oxford University Press, 1986.

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