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A new study describes one of Xanthomonas citri's secretion systems and a signaling pathway that enhances its resistance against amoebae. Investigations might contribute for future forms of intervening and putting a stop on the development of X. citri, known for its persistency. Share: FULL STORY Xanthomonas citri, the bacterium that causes citrus canker, a disease responsible for major damage to lemon and orange groves in worldwide scale, has a veritable arsenal of weapons to overcome [...]

University of Exeter - Huge swathes of land in Chile, Brazil and Argentina are covered with millions of Araucaria, or monkey puzzle trees, thanks to people planting or cultivating them more than a thousand years ago, a new study shows. Recent logging means the landscape is now one of the world's most at-risk environments. It had been thought the forests expanded due to wetter and warmer weather. But the research shows the rapidly expanding pre-Columbian population of South America, Southern [...]

Fundação de Amparo à Pesquisa do Estado de São Paulo Summary: Study suggests dysregulation of gene NEUROG2 could be linked to development of focal cortical dysplasia, one of the most common causes of drug-resistant epilepsy. NEUROG2 is involved in cell differentiation and, when overexpressed, it maintains the neurogenesis signal active into adulthood, what helps explaining the presence of abnormal neurons and glial cells in patients' brains. FULL STORY One of the most frequent causes of [...]

The bombing of the Japanese cities Hiroshima and Nagasaki by the United States in 1945 was the first and only use of nuclear weapons against civilian targets. A series of studies began in its aftermath to measure the impact of the fallout, in terms of both the radiation dose to which the victims were exposed and the effects of this exposure on DNA and health in general. Continuing research that started in the 1980s under the leadership of physicist Sérgio Mascarenhas, Full Professor at the [...]

A Brazilian study published April 26 in the journal Cancer Research shows for the first time in vivo that Zika virus can be used as a tool to treat aggressive human central nervous system (CNS) tumors. After injecting small amounts of the pathogen into the brains of mice with an advanced stage of the disease, the scientists observed a significant reduction in tumor mass and an increase in survival. In some cases, the tumor was completely eliminated, even where the disease had metastasized to [...]

Summary: Research shows anti-hypertensive drugs improve heart rate more in patients who listen to music after taking medication. Among musical genres, classical music is the one with greatest efficiency at reducing arterial pressure; authors of the study speculate whether music acts on the patients' parasympathetic system, increasing their capability of absorbing medication. FULL STORY Research shows anti-hypertensive drugs improve heart rate more in patients who listen to music after taking [...]

Discovered accidentally over a century ago, the phenomenon of superconductivity continues to inspire a technological revolution. In 1911, while studying the behavior of solid mercury supercooled to 4 K (-269 °C), Dutch physicist Heike Kamerlingh Onnes (1853-1926) observed for the first time that certain materials conducted electricity with neither resistance nor losses at temperatures in the vicinity of absolute zero. Scientist are further exploring the exotic behaviors displayed by organic [...]

FULL STORY 'By making the QD 'see' more of ?1 or ?2, i.e., by varying the system's asymmetry, we can use the artificial atom as a tuner, where the thermal or electrical energy that flows through it is redshifted or blueshifted', said Antonio Carlos Ferreira Seridonio, a researcher at São Paulo State University (UNESP) in Brazil. Credit: Luciano Henrique Siliano Ricco (FEIS-UNESP) 'By making the QD 'see' more of ?1 or ?2, i.e., by varying the system's asymmetry, we can use the artificial [...]

The new methodology measures tumor aggressiveness and the risk of relapse, helping doctors plan treatment