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Mohammad Khajouei‑Nezhad,Mohammad Hossein Paydar,Majid Mokarizadeh Haghighi Shirazi,Jenő Gubicza 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.12
In this study the feasibility of using high-pressure torsion (HPT) process as a suitable technique for solid-state recycling ofAl alloy machining chips has been evaluated. One and four turns of HPT were used for consolidation of 7075 Al alloy chips/commercially pure Al powder mixtures at room temperature. The prepared mixtures included different weight fraction ofchips in the range from 20 to 100%. The samples were fabricated from either annealed or non-annealed chips. Additionally,the effect of the fraction of 7075 Al chips on the density, microstructure and tensile behavior of the consolidated sampleswas investigated. It was found that the addition of pure aluminum powder played an important role as a binder in the consolidationprocess and yielded improved mechanical properties due to creating lower porosity and better bonding betweenthe chips. Tensile tests revealed that the highest ultimate tensile strength and fracture strain were obtained for the compositecontaining near 50 wt% annealed 7075 Al chips, and fabricated through 4 turns of HPT. Optical microscopy investigationsdemonstrated that these conditions resulted in a fine microstructure with uniform distribution of chips.
Sofí,a M Martí,nez-Sá,nchez,Tomá,s E Martí,nez-Garcí,a,Diego Munguí,a-Izquierdo 대한신경정신의학회 2020 PSYCHIATRY INVESTIGATION Vol.17 No.4
Objective To analyze the clinical, psychopathological, physical, and sleep-related evolution of adolescents with restricting-type of anorexia nervosa (AN-R) after 10 weeks of a daytime hospital program. Methods Body composition, physical activity and sleep were measured objectively before and after 10 weeks of treatment. In addition, psychopathology and body image disturbances were measured with a self-report questionnaire. Results Fourteen female adolescents with AN-R (14.3±1.6 years old) participated in the study. A significant increase was found in eight of the ten variables for body composition (p<0.05). There were no significant changes in psychopathology, body image disturbances or physical activity. Concerning sleep, a significant, moderately standardized and substantial increase in night latency was found (p=0.002), and there was a significant, small standardized and substantial decrease in night efficiency (p=0.035). Conclusion After 10 weeks of follow-up with adolescent patients with AN-R who attended a day hospital program, there was a positive evolution of body composition. However, with regard to sleep patterns, there was a worsening of latency and night efficiency. Therefore, sleep care should be addressed in acute treatment programs for adolescents with AN-R.
Marti´nez, Roberto Me´ndez 서울大學校 스페인中南美硏究所 2000 이베로아메리카硏究 Vol.11 No.-
No es posible referirse a la politica cultural cubana de este momento sin detenerse, aunque sea un instante, en los rasgos fundamentales que definen la cultura de nuestra nacion y en sus nexos con la vida social. Cuba comienza el siglo XIX con tres siglos de dominacio´n colonial a sus espaldas. Espan~a, como escribira´ an~os despue´s el partiota Carlos Manuel de Ce´spedes en su Manifiesto del 10 de octubre, "gobierna a la Isla con brazo de hierro ensangrentado", pero no puede impedir que emerja un pensamiento que resulta deudor en cierta medida del pensamiento dela Ilustracio´n europea del siglo ⅩⅤⅢ y con ella, del ideal de la Modernidad. Estos intelectuales, formados en universidades europeas o en una importante institucio´n educacional cubana: el Seminario de San Carlos y San Ambrosio, son lectores de Voltaire, Rousseau, Montesquieu, algunos de ellos vieron con simpatia la Revolucio´n Francesa y en lo esencial coincidian en abogar por la abolicio´n de la esclavitud y la instauracio´n en la Isla de un capitalismo al estiloingle´s, por la obencio´n de reformas politicas que dieran un estatuto auto´nomo al pais -en algunos casos, como el del Padre Fe´lix Varela, abogaba francamente por la completa independencia y en lo cultural por una reforma de la educacio´n y el desarrollo de instituciones ajenas al sistema colonial: bibliotecas, liceos, ca´tedras, desde las que se expresaran las e´lites ilustradas, pues estaban convencidos de que el destino del pais estaba estrechamente asociado al crecimiento y expansio´n de su cultura.
UNNOTICED MAGNETIC FIELD OSCILLATIONS IN THE VERY QUIET SUN REVEALED BY SUNRISE/IMaX
Martí,nez Gonzá,lez, M. J.,Asensio Ramos, A.,Manso Sainz, R.,Khomenko, E.,Martí,nez Pillet, V.,Solanki, S. K.,Ló,pez Ariste, A.,Schmidt, W.,Barthol, P.,Gandorfer, A. IOP Publishing 2011 ASTROPHYSICAL JOURNAL LETTERS - Vol.730 No.2
<P>We present observational evidence for oscillations of magnetic flux density in the quiet areas of the Sun. The majority of magnetic fields on the solar surface have strengths of the order of or lower than the equipartition field (300-500 G). This results in a myriad of magnetic fields whose evolution is largely determined by the turbulent plasma motions. When granules evolve they squash the magnetic field lines together or pull them apart. Here, we report on the periodic deformation of the shapes of features in circular polarization observed at high resolution with SUNRISE. In particular, we note that the area of patches with a constant magnetic flux oscillates with time, which implies that the apparent magnetic field intensity oscillates in antiphase. The periods associated with this oscillatory pattern are compatible with the granular lifetime and change abruptly, which suggests that these oscillations might not correspond to characteristic oscillatory modes of magnetic structures, but to the forcing by granular motions. In one particular case, we find three patches around the same granule oscillating in phase, which means that the spatial coherence of these oscillations can reach 1600 km. Interestingly, the same kind of oscillatory phenomenon is also found in the upper photosphere.</P>
Separation of a high-value pharmaceutical compound from waste ethanol by nanofiltration
M. Brito Martı´nez,B. Van der Bruggen,Z. Rodriguez Negrin,P. Luis Alconero 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.5
Recovery of the high-value active pharmaceutical ingredient 1-(5-bromo-fur-2-il)-2-bromo-2-nitroethane, referred as G-1 in this work, from ethanol solution was studied by using nanofiltration (NF), with the objective of closing the production cycle. A recovery of G-1 around 90% was obtained,offering the self-made membranes with 25% and 27% PES and the commercial membrane NF270(FilmTec, Dow) the most promising results in terms of flux of ethanol through the membrane. These membranes were considered in the process design of a real scale system, showing the technical and economic viability of NF for G-1 recovery.
Ana L. Martı´nez-Lo´pez,Elizabeth Carvajal-Millan,Jorge Marquez-Escalante,Alma C. Campa-Mada,Agustı´n Rasco´n-Chu,Yolanda L. Lo´pez-Franco,Jaime Lizardi-Mendoza 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.2
Arabinoxylans (AX) gels at 4% (w/v) wereprepared using laccase (LAX gels) or peroxidase (PAXgels), and their cross-linking, rheological, structural, andspectroscopic characteristics were investigated. LAX gelspresented lower amount of 5,50-diferulic acid (11%),smaller mesh size (128 nm), and higher hardness (37 N)and elasticity (430 Pa) than the PAX gels (28%, 197 nm,7 N, and 120 Pa, respectively). Microscopy of the LAXgels showed linked strands, while the system was lessconnected in the PAX gels. The Raman band at 2895 cm-1of the LAX and PAX gels was less intense, indicatingenhanced hydrogen bonding compared to that of AX. Thisdecrease was less dramatic for the PAX gels. The greatercontent of 5,50-diferulic acid in PAX gels could favorintrachain bonds, affecting their rheological, structural, andspectroscopic characteristics. Laccase may be a betteroption than peroxidase for AX gelation intended for foodand biotechnological applications.
Ariadne Gutie´rrez Martı´nez,Balia Pardo,Rafael Ga´mez,Rosa Mas,Miriam Noa,Gisela Marrero,Maikel Valle,Haydee Garcı´a,Dayisell Curveco,Nilda Mendoza,Edy Goicochea 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.12
D-004 is a lipid extract obtained from Cuban royal palm fruits, consisting of a mixture of free fatty acids, that prevents prostate hyperplasia induced with testosterone in rodents. This study investigated the possible alterations due to D-004 of androgen-dependent development after exposure in utero and compared them with those due to finasteride. Rats were randomized into five experimental groups: a control group, three groups treated with D-004 at 500, 750, or 1,000 mg/kg/day,respectively, and a group treated with finasteride (10 mg/kg/day). Male rats were treated 10 weeks before and during mating. Female rats were treated for 15 days prior mating, during mating, during pregnancy, and until lactation (day 21) except for those treated with finasteride, which were only administered the drug on gestational days 12–21. All male offspring were monitored individually until necropsy after postnatal day 90. The results of the present study indicate that D-004 induced no alterations in androgen-dependent development after the exposure in utero. Also, the current study demonstrated a permanent reduction in anogenital distance and retention of nipples in adult male rats exposed to finasteride during late gestation. Significant alterations induced by exposure to finasteride were mainly in tissues dependent on dihydrotestosterone during development.