El aceite de ricino, en muchas ocasiones mal traducido como aceite de castor por su denominación en inglés (castor oil), se obtiene a partir de la planta Ricinus communis, que contiene aproximadamente un 40-50 % del aceite.
Around the world, hundreds of women infected with the Zika virus have given birth to children suffering from microcephaly or other brain defects, as the virus attacks key cells responsible for generating neurons and building the brain as the embryo develops. Studies have suggested that Zika enters these cells, called neural progenitor cells (NPCs), by grabbing onto a specific protein called AXL on the cell surface. Now, scientists at the Harvard Stem Cell Institute (HSCI) and Novartis have shown that this is not the only route of infection. The scientists demonstrated that Zika infected NPCs even when the cells did not produce the AXL surface receptor protein that is widely thought to be the main vehicle of entry for the virus. “Our finding really recalibrates this field of research because it tells us we still have to go and find out how Zika is getting into these cells,” said Kevin Eggan, principal faculty member at HSCI, professor of stem cell and regenerative biology at Harvard University and co-corresponding author on a research paper in the journal Stem Cell Stem.
The aim of this study was to evaluate the effects of newly formulated topical cream of Calendula officinalis extract on the mechanical parameters of the skin by using the cutometer. The Cutometer 580 MPA is a device that is designed to measure the mechanical properties of the skin in response to the application of negative pressure. This non-invasive method can be useful for objective and quantitative investigation of age related changes in skin, skin elasticity, skin fatigue, skin hydration, and evaluation of the effects of cosmetic and antiaging topical products. Two creams (base and formulation) were prepared for the study. Both the creams were applied to the cheeks of 21 healthy human volunteers for a period of eight weeks. Every individual was asked to come on week 1, 2, 3, 4, 5, 6, 7, and 8 and measurements were taken by using Cutometer MPA 580 every week. Different mechanical parameters of the skin measured by the cutometer were; R0, R1, R2, R5, R6, R7, and R8. These were then evaluated statistically to measure the effects produced by these creams. Using ANOVA, and t-test it was found that R0, and R6 were significant (p <0.05) whereas R1, R2, R5, R7, R8 were insignificant (p > 0.05). The instrumental measurements produced by formulation reflected significant improvements in hydration and firmness of skin.
La fiebre hemorrágica del Ébola es una enfermedad grave y a menudo mortal que puede ocurrir en humanos y en primates (por ejemplo, monos, gorilas).
La fiebre hemorrágica del Ébola (fiebre del Ébola) es causada por un virus que pertenece a la familia llamada Filoviridae, del cual los científicos han identificado cinco tipos. Se ha informado que cuatro de estos tipos causan la enfermedad en humanos: virus del Ébola-Zaire; virus del Ébola-Sudán, virus del Ébola-Costa de Marfil y el virus del Ébola-Bundibugyo.
La enfermedad se puede transmitir a los humanos a partir de animales y materiales animales infectados. El Ébola también se puede propagar entre humanos por el contacto cercano con fluidos corporales infectados o a través de agujas infectadas en el hospital.
Durante el período de incubación, que puede durar alrededor de una semana (rara vez hasta dos semanas) después de la infección, los síntomas abarcan:
Los síntomas tardíos abarcan:
nherited differences in taste perceptions may help explain why some people eat more salt than recommended, according to preliminary research presented at the American Heart Association's Scientific Sessions 2016. "Genetic factors that influence taste aren't necessarily obvious to people, but they can impact heart health by influencing the foods they select," said lead author Jennifer Smith, B.S.N., R.N., a Ph.D. student at the University of Kentucky College of Nursing. Previous research, according to the authors, showed that people who have one of the two most common variants of a gene (TAS2R38) that enhances bitter taste perception are likely to avoid heart-healthy foods with bitter properties, such as broccoli and dark leafy greens. In the current study, researchers sought to determine whether that bitter-enhancing genetic variations would also influence other food choices.
he fifth meeting of the Emergency Committee (EC) on Zika and microcephaly convened by the Director-General under the International Health Regulations (IHR 2005) regarding microcephaly, other neurological disorders and Zika virus was held by teleconference on 18 November 2016. The Committee was briefed on the implementation of the Temporary Recommendations issued by the Director-General on advice from the four previous EC meetings. The Committee was updated on the latest developments on Zika virus geographic spread, natural history, epidemiology, microcephaly and other neonatal complications associated with Zika virus, Guillain-Barré syndrome (GBS) and current knowledge on sexual transmission of Zika virus. The following States Parties provided information on microcephaly, GBS and other neurological disorders occurring in the presence of Zika virus transmission as well as control measures being implemented: Brazil, Thailand, and the United States of America. The Public Health Emergency of International Concern (PHEIC) declared by the Director-General of WHO has led the world to an urgent and coordinated response, providing the understanding that Zika virus infection and associated consequences represent a highly significant long-term problem that must be managed by WHO, States Parties and other partners in a way tha
Recent world attention has been drawn to a global Zika virus (ZIKV) outbreak and its link with devastating cases of microcephaly and Guillain-Barre syndrome. ZIKV infection is spreading rapidly within the Americas after originating from an outbreak in Brazil (Campos et al., 2015). Mounting evidence suggests that ZIKV infection in pregnant women can cause congenital abnormalities as well as fetal demise (Calvet et al., 2016, Cugola et al., 2016, Miner et al., 2016, Wu et al., 2016). Initial case descriptions of microcephaly and spontaneous abortions have been supported by evidence of viral RNA and antigen in the brains of congenitally infected fetuses and newborns (Martines et al., 2016, Mlakar et al., 2016).
Scientists used the national synchrotron facility of UK - Diamond Light Source - to analyse the virus in incredible detail. They revealed the two drugs could bind to the crucial part of Ebola that the virus needs to infect cells. However, the team warns this is just a starting point and more effective drugs need to be researched.
IEEE Fellow Jan M. Rabaey and researchers at the University of California, Berkeley, made headlines recently by building the first wireless, dust particle–size sensors that could eventually be implanted in the human body to monitor nerves, muscles, and organs. The sensors, known as neural dust motes, have so far been implanted in rats’ muscles and peripheral nerves. The motes rely on ultrasound projected into the body for power and to read out measurements. Ultrasound, already widely used in hospitals, can penetrate nearly anywhere in the body. The journal Neuron in August published an article describing the researchers’ work: “Wireless Recording in the Peripheral Nervous System With Ultrasonic Neural Dust.”