Foram encontradas 50 questões.
B2S3(s) + H2O(!$ \ell !$) → H3BO3(aq) + H2S(g)
O sulfeto de boro, B2S3(s), reage, violentamente, com a água e forma o ácido bórico, H3BO3(aq), – frequentemente usado como inseticida – e o sulfeto de hidrogênio, H2S(g), – gás tóxico de odor forte e desagradável – de acordo com a equação química não balanceada.
Após o balanceamento dessa equação química, com os menores coeficientes inteiros, pode-se afirmar:
Provas
Há vários anos a radiação UV-C é utilizada na desinfecção de água, sendo os usos mais comuns em água potável, efluentes tratados e água de reuso. Com o uso da radiação UV-C há uma significativa redução no consumo de produtos químicos que, por vezes, são despejados no meio ambiente e, em alguns casos, tornam–se subprodutos com alto potencial danoso.
Disponível em: <http://www.ecocasa.com.br/desinfeccao-de-agua>. Acesso em: 14
abr. 2016. Adaptado.
Tratando-se da natureza e das propriedades físicas da radiação ultravioleta, é correto afirmar:
Provas
O agronegócio deve ser entendido como um processo, na produção agropecuária intensiva. São utilizadas uma série de tecnologias e biotecnologias para alcançar níveis elevados de produtividade, sendo necessário que alguém ou uma empresa forneça tais elementos.
Disponível em: <http://mundoeducacao.bol.uol.com.br/geografia/agronegocios.htm>. Acesso
em: 2 mai. 2016. Adaptado.
Segundo a Constituição brasileira, materializada na Lei nº 11.326 de julho de 2006, considera-se agricultor familiar aquele que desenvolve atividades econômicas, no meio rural, e que atende alguns requisitos básicos, tais como: não possuir propriedade rural maior que 4 módulos fiscais; utilizar, predominantemente, mão de obra da própria família nas atividades econômicas de propriedade; e possuir a maior parte da renda familiar proveniente das atividades agropecuárias desenvolvidas no estabelecimento rural.
Disponível em: <http://mundoeducacao.bol.uol.com.br/geografia/agricultura-familiar.htm>.
Acesso em: 2 mai. 2016. Adaptado.
Os dois fragmentos de textos permitem identificar como elemento diferenciador entre o agronegócio e a agricultura familiar a
Provas
Leio o título no jornal: “Zika agrava abandono de mulheres no Nordeste”. Esse “agravaB)”, no início da frase, é tão dramático quanto o “ZikaB)” que o antecede, pois nos diz de duas epidemias sobrepostas. A mais antiga, o abandono sistemático de mulheres e filhos, já é aceita naturalmente, como se fizesse parte da normalidade. Resta pedir aos céus que não nos acostumemos com a outra.
Houve um tempo em que mocinha que aparecesse grávida era expulsa de casa. Hoje, se a adolescente aparecer grávida, a família acaba de criá-la e a seu filho. As duas atitudes desconsideram o homem que engravidou a mocinha. Ela que se cuidasse. Foi dar uma de gostosa, ele sucumbiuD).
O filho é dela, só dela, e a ela cabe criá-lo. Como se fosse apenas um acidente de percurso, o pai some a caminho do futuro, sem problemas de consciência.
Tudo isso já faz parte de infinitas rotinas domésticas brasileiras. O país aceita como normal esse modelo em que as crianças são as mais prejudicadas, sem pai, sem família organizada, sem as oportunidades que presença e contribuições de um pai poderiam lhes dar.
Mas o Zika impõe uma pergunta: acharemos normal que pais abandonem seus filhos malformados, ou buscaremos atitudes mais civilizadas?
COLASANTI, Marina. Duas epidemias sobrepostas. Disponível em: <http://www.
revistapazes.com/duas-epidemias-sobrepostas-texto-de-marina-colasanti/>. Acesso em:
3 abr. 2016. Adaptado.
Tendo em vista a polifonia que se desenvolve ao longo dos argumentos construídos pela voz autoral, é correto afirmar:
Provas
Fill in the parentheses with T (True) or F (False).
( ) There seems to be a link between the Zika virus and malformation in newborns.
( ) Some of Zika’s symptoms include aches and pains almost all over one’s body.
( ) Cases of microcephaly in Brazil have been increasing.
( ) Scientists are now sure that there’s a strong connection between the Zika virus and microcephaly.
The correct sequence, from top to bottom, is
Provas
Who would have thought it? The Aedes aegypti mosquito, a vector of dengue, zika and chikungunya doesA) have a good side. Researchers at the University of São Paulo, USP, have discovered anti-inflammatory substances in its saliva capable of controlling immunity and treating intestinal diseases, such asB) ulcerative colitis – in rodents, at least.
The study, which took place at USP's Faculty of Pharmaceutical Sciences in Ribeirão Preto, gave rise to a doctoral thesis and an article published in the scientific journal International Immunopharmacology.
ResearchersC) will now attempt to identify the exact molecules in the saliva that have this therapeutic action. According to the immunologist whoC) supervised the study, there is a "cocktail" of substances in the saliva of the Aedes aegypti that are still being identified. Once these molecules have been identified, the aim is to extract them and synthesize them in a laboratory, in order toD) then study them in clinical trials with human participants.
A professor at USP's Institute of Biomedical Sciences is trying to raise funds to create a company that would performE) the pre-clinical trials – testing on non-human animals, before the drugs are tested on humans. After the identification and sequencing of the molecule, production can either be carried out using "biofabrics", made from fungi or bacteria, or artificial synthesizers, depending on the complexity of the molecule.
According to the professor , the new drug based on mosquito saliva was also successful in the treatment of diseases such as autoimmune hepatitis and multiple sclerosis. As with ulcerative colitis, both of these diseases have a significant inflammatory element.
Disponível em: <www1.folha.uol.com.br/internacional/enscienceandhealth/2016/03/1745824-
researchers-discover-that-mosquito-saliva-has-antiinflammatory-properties.shtml>. Acesso
em: 22 abr. 2016. Adaptado.
Considering language use in the text, it’s correct to say:
Provas
Who would have thought it? The Aedes aegypti mosquito, a vector of dengue, zika and chikungunya does have a good side. Researchers at the University of São Paulo, USP, have discovered anti-inflammatory substances in its saliva capable of controlling immunity and treating intestinal diseases, such as ulcerative colitis – in rodents, at least.
The study, which took place at USP's Faculty of Pharmaceutical Sciences in Ribeirão Preto, gave rise toA) a doctoral thesis and an article published in the scientific journal International Immunopharmacology.
Researchers will now attemptB) to identify the exact molecules in the saliva that have this therapeutic action. According to the immunologist who supervised the study, there is a "cocktail" of substances in the saliva of the Aedes aegypti that are still being identified. Once these molecules have been identified, the aimC) is to extract them and synthesize them in a laboratory, in order to then study them in clinical trials with human participants.
A professor at USP's Institute of Biomedical Sciences is trying to raise fundsD) to create a company that would perform the pre-clinical trials – testing on non-human animals, before the drugs are tested on humans. After the identification and sequencing of the molecule, production can either be carried outE) using "biofabrics", made from fungi or bacteria, or artificial synthesizers, depending on the complexity of the molecule.
According to the professor , the new drug based on mosquito saliva was also successful in the treatment of diseases such as autoimmune hepatitis and multiple sclerosis. As with ulcerative colitis, both of these diseases have a significant inflammatory element.
Disponível em: <www1.folha.uol.com.br/internacional/enscienceandhealth/2016/03/1745824-
researchers-discover-that-mosquito-saliva-has-antiinflammatory-properties.shtml>. Acesso
em: 22 abr. 2016. Adaptado.
The phrase from the text has not been suitably defined in
Provas
Who would have thought it? The Aedes aegypti mosquito, a vector of dengue, zika and chikungunya does have a good side. Researchers at the University of São Paulo, USP, have discovered anti-inflammatory substances in its saliva capable of controlling immunity and treating intestinal diseases, such as ulcerative colitis – in rodents, at least.
The study, which took place at USP's Faculty of Pharmaceutical Sciences in Ribeirão Preto, gave rise to a doctoral thesis and an article published in the scientific journal International Immunopharmacology.
Researchers will now attempt to identify the exact molecules in the saliva that have this therapeutic action. According to the immunologist who supervised the study, there is a "cocktail" of substances in the saliva of the Aedes aegypti that are still being identified. Once these molecules have been identified, the aim is to extract them and synthesize them in a laboratory, in order to then study them in clinical trials with human participants.
A professor at USP's Institute of Biomedical Sciences is trying to raise funds to create a company that would perform the pre-clinical trials – testing on non-human animals, before the drugs are tested on humans. After the identification and sequencing of the molecule, production can either be carried out using "biofabrics", made from fungi or bacteria, or artificial synthesizers, depending on the complexity of the molecule.
According to the professor , the new drug based on mosquito saliva was also successful in the treatment of diseases such as autoimmune hepatitis and multiple sclerosis. As with ulcerative colitis, both of these diseases have a significant inflammatory element.
Disponível em: <www1.folha.uol.com.br/internacional/enscienceandhealth/2016/03/1745824-
researchers-discover-that-mosquito-saliva-has-antiinflammatory-properties.shtml>. Acesso
em: 22 abr. 2016. Adaptado.
Fill in the parentheses with T (True) or F (False). It’s stated in the text
( ) Researchers have succeeded in identifying all the substances existing in the saliva of the Aedes aegypti mosquito.
( ) So far, the drug based on the mosquito saliva has proved to work with experimental animals.
( ) Humans are expected to take part in the experiment with the new drug in the near future.
( ) Scientists still have to pinpoint all the beneficial molecules that exist in the mosquito saliva.
The correct sequence, from top to bottom, is
Provas
Who would have thought it? The Aedes aegypti mosquito, a vector of dengue, zika and chikungunya does have a good side. Researchers at the University of São Paulo, USP, have discovered anti-inflammatory substances in its saliva capable of controlling immunity and treating intestinal diseases, such as ulcerative colitis – in rodents, at least.
The study, which took place at USP's Faculty of Pharmaceutical Sciences in Ribeirão Preto, gave rise to a doctoral thesis and an article published in the scientific journal International Immunopharmacology.
Researchers will now attempt to identify the exact molecules in the saliva that have this therapeutic action. According to the immunologist who supervised the study, there is a "cocktail" of substances in the saliva of the Aedes aegypti that are still being identified. Once these molecules have been identified, the aim is to extract them and synthesize them in a laboratory, in order to then study them in clinical trials with human participants.
A professor at USP's Institute of Biomedical Sciences is trying to raise funds to create a company that would perform the pre-clinical trials – testing on non-human animals, before the drugs are tested on humans. After the identification and sequencing of the molecule, production can either be carried out using "biofabrics", made from fungi or bacteria, or artificial synthesizers, depending on the complexity of the molecule.
According to the professor , the new drug based on mosquito saliva was also successful in the treatment of diseases such as autoimmune hepatitis and multiple sclerosis. As with ulcerative colitis, both of these diseases have a significant inflammatory element.
Disponível em: <www1.folha.uol.com.br/internacional/enscienceandhealth/2016/03/1745824-
researchers-discover-that-mosquito-saliva-has-antiinflammatory-properties.shtml>. Acesso
em: 22 abr. 2016. Adaptado.
In the study mentioned in the text, researchers have found that the saliva of the Aedes aegypti mosquito
Provas
Quando o astronauta americano Scott Kelly retornou do espaço, após passar quase um ano na Estação Espacial Internacional, EEI, disse sentir fortes dores pelo corpo, nos músculos e nas articulações e relatou que mal consegue dizer onde sente dor, devido à intensidade. Ele também relata algo que não havia sentido antes: agora, ele começou a sentir hipersensibilidade na pele. Segundo o astronauta, isso ocorre porque a pele não encostou em nada por muito tempo, o que causa uma ardência ao deitar e ao sentar, por exemplo. Mas o que transformou a viagem de Kelly interessante, além dos 340 dias que ele passou na EEI e as 5 440 voltas que deu ao redor de nosso planeta, foi o fato de que seu irmão gêmeo, Mark Kelly, ficou aqui na Terra para que cientistas conseguissem estudar o impacto psicológico e fisiológico de uma viagem longa no espaço sobre o corpo humano. Os irmãos gêmeos foram submetidos a uma bateria de exames psicológicos e fisiológicos antes e depois da viagem espacial. Eles vão ser alvos de pesquisa por dois anos.
Disponível em: <http://diariodebiologia.com/>. Acesso em: 21 abr. 2016. Adaptado.
Sabendo-se que a Estação Espacial Internacional, EEI, encontra-se em órbita a uma altitude de 350km, que viaja a uma velocidade média de 2,77.104km/h, que o módulo da aceleração da gravidade na superfície da Terra é 10m/s2 e que o raio da Terra é 6,4.106m, é correto afirmar:
Provas
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