A fotoproteção previne efeitos danosos da radiação ultravioleta (UV). As principais formas de fotoproteção incluem os protetores solares com filtros inorgânicos e orgânicos. Os filtros orgânicos são moléculas capazes de absorver radiação UVA e UVB e transformá-las em radiações energéticas inofensivas ao ser humano. A Benzofenona-3 (Bz-3) é um exemplo de filtro orgânico utilizado em protetores solares e cosméticos. A estrutura da benzofenona-3 apresenta dois anéis aromáticos isolados por uma carbonila de uma cetona e um fenol na posição meta em relação ao grupo metóxi em um dos anéis aromáticos.
A estrutura do protetor orgânico supracitado no texto corresponde a
Questões relacionadas
- Língua Inglesa | 2.07 Conjunções
(UNESP) Pediatric group advises parents to read to kids
June 26, 2014
By Amy Graff
Reading Go Dog Go to your 6 month old might seem like wasted time because she’s more likely to eat the book than help you turn the pages, but a statement released by the American Academy of Pediatrics (AAP) this week says reading in the early years is essential. Reading out loud gets parents talking to their babies and the sound of an adult’s voice stimulates that tiny yet rapidly growing brain. In the statement, the academy advises pediatricians to tell parents to read books to their children from birth.
Reading regularly with young children stimulates optimal patterns of brain development and strengthens parent-child relationships at a critical time in child development, which, in turn, builds language, literacy, and social-emotional skills that last a lifetime. Research shows that a child’s brain develops faster between 0 and 3 than at any other time in life, making the early years a critical time for babies to hear rich oral language. The more words children hear directed at them by parents and caregivers, the more they learn.
While many babies are read Goodnight Moon and The Very Hungry Caterpillar every night before bed, others never get a chance to “pat the bunny.” Studies reveal that children from low-income, less-educated families have significantly fewer books than their more affluent peers. By age 4, children in poverty hear 30 million fewer words than those in higher-income households. These dramatic gaps result in significant learning disadvantages that persist into adulthood. The AAP hopes the new guidelines will encourage all parents to start reading from day one.
Research shows that when pediatricians talk with parents about reading, moms and dads are more likely to fill their home with books and read. Also, to help get more parents reading, the AAP is partnering with organizations such as Scholastic and Too Small to Fail to help get reading materials to new families who need books the most.
This is the first time the AAP has made a recommendation on children’s literary education and it seems the timing might be just right as more and more parents are leaning on screens and electronic gadget to occupy their babies. “The reality of today’s world is that we’re competing with portable digital media,” Dr. Alanna Levine, a pediatrician in Orangeburg, N.Y., told The New York Times. “So you really want to arm parents with tools and rationale behind it about why it’s important to stick to the basics of things like books.”
No trecho do segundo parágrafo “which, in turn, builds language”, a expressão em destaque equivale, em português, a
- Matemática
A figura mostra o ângulo de visão que um mesmo observador tem de uma estrutura de caixa d’água em dois pontos diferentes. Sabe-se que a altura dos olhos, em relação ao piso plano sobre o qual a estrutura está apoiada perpendicularmente, é exatamente a metade da altura da estrutura da caixa d’água, e que a distância entre os dois pontos de observação é de 2 metros.
Dados:
A partir dessas informações, é possível determinar que a altura da estrutura da caixa d’água, em metros, é igual a:
- Matemática | 1.7 Razão, Proporção e Regra de Três
(ENEM 2015 1º APLICAÇÃO)
A insulina é utilizada no tratamento de pacientes com diabetes para o controle glicêmico. Para facilitar sua aplicação, foi desenvolvida uma "caneta" na qual pode ser inserido um refil contendo 3 mL de insulina, como mostra a imagem.
Para controle das aplicações, definiu-se a unidade de insulina como 0,01 mL. Antes de cada aplicação, é necessário descartar 2 unidades de insulina, de forma a retirar possíveis bolhas de ar.
A um paciente foram prescritas duas aplicações diárias: 10 unidades de insulina pela manhã e 10 à noite.
Qual o número máximo de aplicações por refil que o paciente poderá utilizar com a dosagem prescrita?
- Língua Inglesa | 1.4 Reading Strategies
Working for on-demand startups like Uber and TaskRabbit is supposed to offer flexible hours and higher wages, but many workers have found the pay lower and the hours less flexible than they expected. Even more surprising: 8 percent of those chauffeuring passengers and 16 percent of those making deliveries said they lack personal auto insurance.
Those are among the findings from a survey about the work life of independent contractors for on-demand startups, a booming sector of the tech industry, being released Wednesday.
“We want to shed light on the industry as a whole,” said Isaac Madan, a Stanford master’s candidate in bioinformatics who worked with two other Stanford students and a recent alumnus on the survey of 1,330 workers. “People need to understand how this space Will change and evolve and help the economy.”
On-demand, often called the sharing economy, refers to companies that let users summon workers via smartphone apps to handle all manner of services: rides, cleaning, chores, deliveries, car parking, waiting in lines. Almost uniformly, those workers are independent contractors rather than salaried employees.
That status is the main point of contention in a recent rash of lawsuits in which workers are filing for employee status. While the survey did not directly ask contractors if they would prefer to be employees, it found that their top workplace desires were to have paid health insurance, retirement benefits and paid time off for holidays, vacation and sick days – all perks of full-time workers. Respondents also expressed interest in having more chances for advancement, education sponsorship, disability insurance and human-relations support.
Because respondents were recruited rather than randomly selected, the survey does not claim to be representational but a conclusion one may come to is that flexibility of new jobs comes with a cost. No all workers are prepared for that!
SFChronicle.com and SFGate.com, May 20, 2015. Adaptado.
(FUVEST 2016 1° FASE) Um dos resultados da pesquisa realizada com prestadores de serviços de empresas do tipo “on-demand” mostra que esses trabalhadores
- História - Fundamental | 02. A vida familiar
QUEM TRABALHA NA COMUNIDADE
Os adultos contratam as crianças para realizarem esses tipos de trabalho porque elas