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No grande setor agropecuário, alimentar e energético do Brasil, podem ser identificados diversos ramos e produtos específicos, cada um apresentando sua configuração regional e conformando seu próprio circuito espacial produtivo. Com base nesse tema, relacione corretamente os produtos apresentados a seguir com suas respectivas distribuições geográficas, numerando a Coluna II de acordo com a Coluna I.
Coluna I
1. Soja
2. Cana-deaçúcar
3. Café
4. Fruticultura
Coluna II
( ) Pela necessidade abundante de água para garantir a sua produção, ocupa, especialmente no sertão nordestino, os vales dos rios São Francisco, Açu e Jaguaribe, onde encontra o ambiente apropriado para uma produtividade ampliada.
( ) É hoje uma das principais commodities do agronegócio brasileiro, com sua produção ocupando regiões tradicionais de plantio no Sul do Brasil que se estenderam aos cerrados do Centro-Oeste e do Nordeste do país.
( ) Símbolo da produção agroexportadora brasileira no período colonial, foi, durante séculos, quase um monopólio da região Nordeste, tendo hoje o estado de São Paulo como seu maior e mais moderno produtor.
( ) Até há poucas décadas era produzido principalmente no estado de São Paulo e no norte do Paraná, mas mudou seu centro de produção para Minas Gerais e para polos secundários no Espírito Santo, Bahia e Rondônia.
A sequência correta, de cima para baixo, é:
Relacione, corretamente, os movimentos sociais da Primeira República com suas respectivas descrições, numerando os parênteses abaixo de acordo com a seguinte indicação:
1.Cangaço
2.Canudos
3.Contestado
4.Revolta da Chibata
( )Ocorrido no sertão da Bahia, sob liderança de um beato cearense, a comunidade por ele organizada foi destruída após ser atacada pela quarta expedição militar que contava com cerca de7 mil soldados.
( )Iniciado no século XIX, esse movimento que durou até a década de 1940 era formado por homens armados que agiam principalmente no nordeste brasileiro; alguns grupos atuavam sob mando dos poderosos e outros eram independentes.
( )Rebelião dos marinheiros, em sua maioria negros e mestiços, contra os castigos corporais a que eram submetidos pelos oficiais, também reivindicavam melhores salários e folgas semanais.
( )Movimento liderado por beatos, ocorrido na região Sul do Brasil,e que teve como pano de fundo a disputa por território entre dois estados, o interesse de grandes companhias e o fanatismo religioso.
A sequência correta, de cima para baixo, é:
T E X T
Can you learn in your sleep?
Sleep is known to be crucial for learning and memory formation. What's more, scientists have even managed to pick out specific memories and consolidate them during sleep. However, the exact mechanisms behind this were unknown — until now.
Those among us who grew up with the popular cartoon "Dexter's Laboratory" might remember the famous episode wherein Dexter's trying to learn French overnight. He creates a device that helps him to learn in his sleep by playing French phrases to him. Of course, since the show is a comedy, Dexter's record gets stuck on the phrase "Omelette du fromage" and the next day he's incapable of saying anything else. This is, of course, a problem that puts him through a series of hilarious situations.
The idea that we can learn in our sleep has captivated the minds of artists and scientists alike; the possibility that one day we could all drastically improve our productivity by learning in our sleep is very appealing. But could such a scenario ever become a reality?
New research seems to suggest so, and scientists in general are moving closer to understanding precisely what goes on in the brain when we sleep and how the restful state affects learning and memory formation.
For instance, previous studies have shown that non-rapid eye movement (non-REM) sleep — or dreamless sleep — is crucial for consolidating memories. It has also been shown that sleep spindles, or sudden spikes in oscillatory brain activity that canbe seen on an electroencephalogram (EEG) during the second stage of non-REM sleep, are key for this memory consolidation. Scientists were also able to specifically target certain memories and reactivate, or strengthen, them by using auditory cues.
However, the mechanism behind such achievements remained mysterious until now. Researchers were also unaware if such mechanisms would help with memorizing new information.
Therefore, a team of researchers set out to investigate. Scott Cairney, from the University of York in the United Kingdom, co-led the research with Bernhard Staresina, who works at the University of Birmingham, also in the U.K. Their findings were published in the journal Current Biology.
Cairney explains the motivation for the research, saying, "We are quite certain that memories are reactivated in the brain during sleep, but we don't know the neural processes that underpin this phenomenon." "Sleep spindles," he continues, "have been linked to the benefits of sleep for memory in previous research, so we wanted to investigate whether these brain waves mediate reactivation. If they support memory reactivation, we further reasoned that it could be possible to decipher memory signals at the time that these spindles took place."
To test their hypotheses, Cairney and his colleagues asked 46 participants "to learn associations between words and pictures of objects or scenes before a nap." Afterward, some of the participants took a 90-minute nap, whereas others stayed awake. To those who napped, "Half of the words were [...] replayed during the nap to trigger the reactivation of the newly learned picture memories," explains Cairney.
"When the participants woke after a good period of sleep," he says, "we presented them again with the words and asked them to recall the object and scene pictures. We found that their memory was better for the pictures that were connected to the words that were presented in sleep, compared to those words that weren't," Cairney reports.
Using an EEG machine, the researchers were also able to see that playing the associated words to reactivate memories triggered sleep spindles in the participants' brains. More specifically, the EEG sleep spindle patterns "told" the researchers whether the participants were processing memories related to objects or memories related to scenes.
"Our data suggest that spindles facilitate processing of relevant memory features during sleep and that this process boosts memory consolidation," says Staresina. "While it has been shown previously," he continues, "that targeted memory reactivation can boost memory consolidation during sleep, we now show that sleep spindles might represent the key underlying mechanism."
Cairney adds, "When you are awake you learn new things, but when you are asleep you refine them, making it easier to retrieve them and apply them correctly when you need them the most. This is important for how we learn but also for how we might help retain healthy brain functions."
Staresina suggests that this newly gained knowledge could lead to effective strategies for boosting memory while sleeping.
So, though learning things from scratch à la "Dexter's Lab" may take a while to become a reality, we can safely say that our brains continue to learn while we sleep, and that researchers just got a lot closer to understanding why this happens.
From: https://www.medicalnewstoday.com/articles/Mar/2018
Leia atentamente o seguinte excerto:
“...Os holandeses então retornaram, em 1630, e atacaram Pernambuco, por ser a mais próspera capitania da colônia. A partir de Olinda e Recife, eles expandiram gradativamente seu domínio pelas terras do Nordeste”.
FARIA, Ricardo de Moura; MIRANDA, Mônica Liz; CAMPOS, Helena Guimarães. Estudos de História. 1 ed. São Paulo: FTD, 2010, p.255.
O trecho acima está relacionado ao fato histórico que corresponde