Emprego de cloreto de clorocolina (CCC) em quatro cultivares de trigo

Field experiments were employed investigate the effect of three nitrogen levels (60, 90 and 120 kg/ha of N) in combination with four chlorocholin chloride (CCC) levels (0, 2, 3 and 4 kg/ha of active ingredient) in four different wheat cultivars (IAS 54, IAS 20-Iassul, IAS 50-Alvorada and Toropi). The chlorocholin chloride reduced the wheat plant hight, causing stem thickness and inter-node shortness. These effects resulted in a higher resistance to lodging, when higher levels of nitrogen fertilizer were used. The cultivars tested did not increase yields when levels of nitrogen higher than 60 kg/ha were applied. The application of chlorocholin chloride increased the wheat yields of the cultivars studied significantly.Testou-se, em condições de campo, em Pelotas, RS, o emprego de três níveis de nitrogênio 60, 90 e 120 kg/ha), combinados com quatro doses de cloreto de clorocolina (0, 2, 3 e 4 kg/ha de ingrediente ativo), em quatro cultivares de trigo (IAS 54, IAS-20- IASSUL, IAS 50-Alvorada e Toropi). O cloreto de clorocolina (CCC) reduziu a altura das plantas de trigo, tornou os colmos mais grossos e os entrenós mais curtos. Conferiu às plantas maior resistência ao acamamento, quando empregados níveis de nitrogênio elevados. As cultivares testadas não responderam a adubações acima de 60 kg/ha de nitrogênio. O cloreto de clorocolina possibilitou o aumento significativo das produções de grãos

Disfunção sistólica aguda de ventrículo esquerdo após drenagem de derrame pericárdico Transient left ventricular systolic dysfunction after pericardial effusion drainage

Paciente com timoma e função sistólica normal do ventrículo esquerdo desenvolveu tamponamento cardíaco, revertido por pericardiocentese. Após quatro dias, foi submetida à exérese do tumor e, em aproximadamente uma semana da drenagem, apresentou disfunção sistólica aguda e grave do ventrículo esquerdo, que melhorou com terapia venosa, normalizando o quadro em três dias.<br>A patient with a thymoma and initially normal ventricular systolic function developed cardiac tamponade, which was relieved by pericardiocentesis. After four days, the tumor was removed and, one week after the relief of tamponade, she developed severe left ventricular systolic dysfunction, that recovered in three days with venous therapy

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora