Prova de 2021: Universidade Regional do Cariri (URCA) — questões com gabarito

Um agricultor da cidade do Crato, necessita repor alguns nutrientes para o controle do amolecimento interno da polpa da manga Tommy a qual cultiva no seu sítio. Para repor uma carência de Ca +2 em sua plantação de mangas ele precisa preparar 10L de Ca a 3%. Qual a massa de cloreto de cálcio que ele precisa para tal operação?

(dados: CaCl2 = 111g e considere a densidade = 1 g/cm3 ou kg/dm3 .

A Química e os Povos Indígenas

A presença da química entre os povos nativos brasileiros se dá quando transformam a matéria prima que extraem da natureza, utilizando procedimentos químicos, que apesar de não formalizados eram bastante produtivos e úteis. Como exemplo podemos citar a produção de venenos como o curare e o timbó. O Curare é um termo para designar venenos para flechas, que os indígenas das áreas da bacia hidrográfica do Orinoco e Amazonas obtém de cascas de certas espécies de cipós (Strychnos spp.), possuindo intensa e letal ação paralisante.

Outro exemplo é uma ação inversa a produção de venenos: a arte do desenvenenamento da mandioca citado por Soentgena e Hilbertb

“A raiz da mandioca contém glicosídeos cianídricos. Se a planta é machucada por inimigos que a devoram, os glicosídeos cianídricos entram em contato com enzimas especiais da planta e o ácido cianídrico altamente venenoso é liberado. Por causa da toxicidade, a planta, cuja raiz é muito rica em amido nutritivo, tem poucos inimigos. A maioria dos animais e também a maioria dos insetos a deixam em paz. Entre os povos indígenas da Amazônia são utilizados vários processos com finalidade de desintoxicar a planta para consumi-la sem o perigo de envenenamento”

(Adaptado de: Jens Soentgena e Klaus Hilbertb. A química dos povos indígenas da américa do sul. Quim. Nova, Vol. 39, No. 9, 1141-1150, 2016)

Quais as funções orgânicas presentes na teobromina?

Texto 5 

Coronavirus has swept through tribes, killing elders and inflicting irreparable damage on tribal history, culture and medicine

   When Bep Karoti Xikrin fell ill with Covid-19, he refused to go to a hospital. The 64-year-old chief of a Xikrin indigenous village in Brazil’s Amazon was plagued by headaches and fatigue and struggled for breath. But, according to his daughter Bekuoi Raquel, he was afraid that if he were admitted to hospital he might never return.

   Instead, he died in his village – and with him, was lost decades of knowledge and leadership. “He knew so much about things we haven’t even experienced,” said Bekuoi, 21. “Everyone admired him. He was very loved.”

   As Brazil’s confirmed overall death toll from Covid-19 passes 50,000, the virus is scything through the country’s indigenous communities, killing chiefs, elders and traditional healers – and raising fears that alongside the toll of human lives, the pandemic may inflict irreparable damage on tribal knowledge of history, culture and natural medicine.

   The Munduruku people alone have lost 10 sábios, or wise ones. “We always say they are living libraries,” said Alessandra Munduruku, a tribal leader. “It’s been very painful.”

   The victims include prominent figures such as Paulinho Paiakan, a Kayapó leader who fought alongside rock star Sting against the Belo Monte dam.

   The indigenous organisation Apib has logged at least 332 Covid-19 deaths, and 7,208 coronavirus cases across 110 communities. “We are facing extermination,” said its executive coordinator, Dinamam Tuxá.

   Indigenous leaders such as Tuxá say the government of the far-right president, Jair Bolsonaro, is failing to protect the country’s 900,000 indigenous people – many of whom live in small communities, where dozens often share the same house.

   Tuxá said Brazil’s Funai indigenous agency has taken too long to send emergency food kits to people isolating in their villages, forcing them to risk infection by traveling to nearby towns for emergency government payments. Funai said it had delivered 82,000 basic food kits and 43,000 hygiene kits.

   Some leaders even blame government health workers for bringing the virus. Katia Silene Akrãtikatêjê, 51, a chief from the Gavião tribe in Pará state, believes she caught Covid-19 after a government health team visited their village to give flu vaccines. “Everyone got sick from there on,” she said.

From: shorturl.at/finAM. Accessed on 07/01/2020

Texto 4

Coronavirus is 10 times deadlier than swine flu: WHO

   COVID-19, the disease caused by coronavirus, is officially 10 times deadlier than the H1N1 swine flu strain that ripped across much of the world in 2009, the World Health Organization (WHO) confirmed Monday.

   The only way to truly halt the spread is a vaccine, WHO chief Tedros Adhanom Ghebreyesus said in a briefing from Geneva. More than 1.8 million people have been infected so far worldwide, and at least 115,000 have died.

   “Evidence from several countries is giving us a clearer picture about this virus, how it behaves, how to stop it and how to treat it,” Tedros said. “We know that COVID-19 spreads fast, and we know that it is deadly – 10 times deadlier than the 2009 flu pandemic.”

   While swine flu, as it was popularly known, killed 18,500 people, the true toll may have been closer to between 151,700 and 575,400, Agence France Presse (AFP) reported, citing The Lancet.

   “We know that the virus can spread more easily in crowded environments like nursing homes,” Tedros continued. “We know that early case finding, testing, isolating, caring for every case, and tracing every contact is essential for stopping transmission.”

   Pointing out that in some countries cases are doubling every three to four days, the disease accelerates fast but “decelerates much more slowly,” Tedros said. “In other words, the way down is much slower than the way up,” he said. “That means control measures must be lifted slowly and with control.”

   Tedros cautioned that restarting the shutdown portions of the economy in the U.S. and other countries whose leaders have been anxious to loosen restrictions could prove deadly. He also exhorted everyone around the world to work together, as several development ministers from the United Kingdom, Denmark, Iceland, Finland, Germany, Norway and Sweden had done in a recent joint editorial.

Texto 2 

   Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.

   Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.

   Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.

   The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.

From: shorturl.at/dKV23. Accessed on 03/27/2020

Texto 2 

   Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.

   Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.

   Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.

   The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.

From: shorturl.at/dKV23. Accessed on 03/27/2020

Texto 2 

   Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.

   Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.

   Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.

   The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.

From: shorturl.at/dKV23. Accessed on 03/27/2020

Texto 1

Part of President Obama’s Speech at Rutgers Commencement 2016

   Facts, evidence, reason, logic, an understanding of science — these are good things. These are qualities you want in people making policy. These are qualities you want to continue to cultivate in yourselves as citizens. That might seem obvious. That’s why we honor Bill Moyers or Dr. Burnell. We traditionally have valued those things. But if you were listening to today’s political debate, you might wonder where this strain of anti-intellectualism came from.

   So, Class of 2016, let me be as clear as I can be. In politics and in life, ignorance is not a virtue. It’s not cool to not know what you’re talking about. That’s not keeping it real, or telling it like it is. That’s not challenging political correctness. That’s just not knowing what you’re talking about.

   You know, it’s interesting that if we get sick, we actually want to make sure the doctors have gone to medical school, they know what they’re talking about. If we get on a plane, we say we really want a pilot to be able to pilot the plane. The rejection of facts, the rejection of reason and science — that is the path to decline.

From: shorturl.at/deAIX. Accessed on 04/01/2020