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【单选题】

Men Smell of Cheese and Women of Onions
Little girls may be made of sugar and all things nice, but their armpits (腋部) 1 of onions. And while free of slug or snail odours, men"s armpits pack a 2 cheesy whiff. That"s the 3 of research in Switzerland that involved taking armpit sweat samples from 24 men and 25 women after he had 4 time in a sauna or ridden an exercise bike for 15 minutes.
The researchers found marked 5 in the sweat from men and women. "Men smell of cheese, and women of gfruit (葡萄柚) or onion," says Christian Starkenmann of Firmenich, a company in Geneva 6 researches flavors and perfumes for food and cosmetics companies.
The team 7 that the women"s armpit sweat constrained relatively high levels of an odourless sulphur-containning compound—5 milligrams per milliliter of sweat versus 0.5 milligrams in men.
When the researchers mixed this compound in the lab with bacteria commonly found in the armpit, the bugs turned it into a thiol (硫醇)—a previously discovered odour from armpits that is 8 to onion.
"The more sulphur (硫) precursor we 9 , the more intense was the malodour (难闻的 气味,恶臭)," says Starkenmann, whose team"s results appear in Chemical Senses . Bacterial enzymes (酶) turn the otherwise odourless precursor 10 the malodour.
The men, meanwhile, had relatively high levels of an odourless fatty acid which turned into a cheesy odour when 11 to the same types of bacteria. The balance of oniony to cheesy precursors in women"s sweat made it smell worse than men"s as rated by independent smell assessors.
Nest; the team hope to develop new ingredients for deodorants that 12 the smells. "We could make inhibitors that neutralize the precursors, or block the bacterial enzymes that do the conversion," says Starkenmann.
Some researchers are skeptical that gender is the main deciding factor, 13 that the patterns found in Swiss volunteers might not apply to other populations with different diets and genetic background. "Other factors 14 what you eat, what you wash with, what you wear and what genes you 15 ," says Tim Jacob of Cardiff University in the U.K. Men Smell of Cheese and Women of Onions

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ask
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give
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include
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learn
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参考答案:
举一反三

【单选题】固定床汽油脱硫醇主催化剂是()

A.
磺化钛氰钴
B.
NAOH溶液
C.
汽油
D.
活性炭

【单选题】常用的精制方法有()和脱硫醇。

A.
加压精制
B.
高温精制
C.
加氢精制
D.
催化精制

【单选题】伯硫醇和硫酚的鉴定可以用()。

A.
硫化铅试验
B.
羟肟酸铁试验
C.
2,4—二硝基苯肼试验
D.
亚硝酸试验

【单选题】硫醇性硫主要存在于( ) 。

A.
汽油
B.
润滑油
C.
减压测线油
D.
渣油

【单选题】与葡萄柚汁合用,可加重肾毒性的药物是

A.
阿托伐他汀
B.
环孢素
C.
氨氯地平
D.
地西泮
E.
奥美拉唑
相关题目:
【单选题】固定床汽油脱硫醇主催化剂是()
A.
磺化钛氰钴
B.
NAOH溶液
C.
汽油
D.
活性炭
【单选题】固定床汽油脱硫醇的载体是()。
A.
磺化钛氰钴
B.
NaOH
C.
活性炭
D.
聚钛氰钴
【单选题】常用的精制方法有()和脱硫醇。
A.
加压精制
B.
高温精制
C.
加氢精制
D.
催化精制
【单选题】伯硫醇和硫酚的鉴定可以用()。
A.
硫化铅试验
B.
羟肟酸铁试验
C.
2,4—二硝基苯肼试验
D.
亚硝酸试验
【单选题】硫醇性硫主要存在于( ) 。
A.
汽油
B.
润滑油
C.
减压测线油
D.
渣油
【单选题】与葡萄柚汁合用,可加重肾毒性的药物是
A.
阿托伐他汀
B.
环孢素
C.
氨氯地平
D.
地西泮
E.
奥美拉唑
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