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2022-10-01   Video
Polymerase Chain Reaction (PCR)

Keywords:

Polymerase chain reaction-- or PCR-- uses repeated cycles of heating and cooling to make many copies of a specific region of DNA. First, the temperature is raised to near boiling, causing the double s...


2022-09-29   Video
Bobtail Squid Burrowing

Keywords:

So this squid is a nocturnal animal. And so what we've done is we put this poor guy in his water during the day. And he doesn't like it. So he looks kind of uncoordinated, he looks a...


2022-09-28   British English
Ernest Hemingway's Biography

Keywords:

Books and arts. Books review. Ernest Hemingway's Biography. The old man and the sea. Hemingway’s Boat: Everything He Loved in Life, and Lost, 1934-1961. By Paul Hendrickson. Paul Hendrickson bibli...

书籍和艺术 书评 欧内斯特·海明威的传记 老人与海 《海明威的船:他生命中所热爱的一切,失去的一切,1934-1961》; 作者:保罗·亨德里克森 保罗·亨德里克森传记的参考目录中列举了76部关于海明威的传记作品,其中9部...


2022-09-25   Video
Cone Snail Strikes a Fish

Keywords:

So let's look at what these guys will eat. If I could have the video, please. So this snail has its proboscis stuck out. That's the translucent yellow tube. And you can see, it stings...


2022-09-22   British English
‘The Boy in the River’

Keywords:

Books and Arts; Book review; Black magic in London; Crimes of passion; The Boy in the River. By Richard Hoskins. In the late 1980s Richard Hoskins, young and newly married, spent six years as a mi...

文艺;书评;伦敦巫术; 激情犯罪;《河里的男孩》,理查德·霍斯金斯着。 在二十世纪八十年代早期,年轻且新婚不久的理查德·霍斯金斯,在博洛博(地名)做了六年的传教士,该地位于刚果首都,金沙萨市的上游。现今已返回英国,有几分非洲专家...


2022-09-21   Video
The LUX Operon

Keywords:

So what you're seeing first, this is just DNA in the bacterial cell. And we've color-coded the genes. So that's the LUX operon. There's five genes in that operon. And somewhere else ...


2022-09-19   Intermediate
High Achievement High Schoolers II

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Steve: Moyukh Chatterjee also goes to High Technology High School in Lincroft, New Jersey. Chatterjee: Well, basically for a while now, I've been interested in efficiency in industry. I really want t...


2022-09-17   Intermediate
High Achievement High Schoolers I

Keywords:

Sruti: I studied the effect of cell phone and Bluetooth devices on simulated driving performance. Steve: And why did you decide to do this study and what did you find? Sruti: I started to conduct a ...


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