问题 问答题 简答题

现国内外有哪些破壁技术?和松花粉所采用的破壁技术有哪些不同?

答案

参考答案:

市场上人们所食用的花粉大多是已破壁的花粉。因为未经加工的花粉极不易消化、吸收,直径仅15一50微米的花粉球外有两层对酸、碱及消化酶均持稳定性的外壁,并且在花粉的外壁中富含纤维素及抗癌物质胡萝卜素等。因此,要想高效吸收花粉营养,必须将花粉球粉碎破壁,破壁率越高,就越容易被人体吸收。目前,国内外绝大多数采用机械破壁法、温差破壁法和发酵破壁法,但效果均不太理想。

一是破壁率低。

二是加工时间长,灭菌难。

三是温度高,营养损失大。

中国新时代科技发展公司采用航天领域的高精尖技术“低温风洞破壁技术”,可在-170℃(生产过程中升至一40℃)三倍音速风流速度下破壁,破壁率一可达99%以上。且有效成份完全保留,破壁后的花粉颗粒仅为5微米,形成超微粉,更利于人体吸收。

单项选择题

With the spread of inter-active electronic media a man alone in his own home will never have been so well placed to fill the inexplicable mental space between cradle and crematorium. So I suspect that books will be pushed more and more into those moments of travel or difficult defecation (1) people still don’t quite know what to do with.

When people do read, I think they’ll want to feel they are reading literature, or (2) something serious. (3) you’re going to find fewer books presenting themselves as no- nonsense and (4) assuming literary pretensions and being packaged as works of art. We can expect an extraordinary variety of genre, but with an underlying (5) of sentiment and vision.

Translators can only (6) from this desire for the presumably sophisticated. We can look forward to lots of difficult names and fantastic stories of foreign parts enthusiastically (7) by the overall worship of the "global village" Much of this will be awful and some wonderful, (8) don’t expect the press or the organizers of prizes to offer you much help in making the appropriate distinctions. They will be chiefly (9) in creating celebrity, the greatest enemy of discrimination, but a good prop for the (10) consumer.

Every ethnic grouping over the world will have to be seen to have a great writer--a phenomenon that will (11) a new kind of provincialism, more chronological than geographic, (12) only the strictly contemporary is talked about and (13) . Universities, including Cambridge, will include (14) their literature syllabus novels written only last year. (15) occasional exhumation for the Nobel, the achievements of ten or only five years ago will be largely forgotten.

In short, you can’t go too far wrong when predicting more of the same. But there is a (16) side to this--the inevitable reaction against it. The practical things I would like to see happen--publishers seeking less to (17) celebrity through extravagant advertising, (18) and magazines (19) space to reflective pieces--are rather more improbable than the Second Coming (耶稣复临). But dullness never quite darkens the whole planet. In their own idiosyncratic fashion a few writers will (20) be looking for new departures.

12()

A.which

B.where

C.when

D.what

多项选择题