alder
US /ˈɔldɚ/
・UK /ˈɔ:ldə(r)/
C1 高級
n.名詞赤楊屬的植物：榿木
I have an alder tree in my garden
影片字幕
Paul Stamets 談蘑菇拯救世界的六種方法 (中英雙字幕) (Paul Stamets 談蘑菇拯救世界的六種方法 (中英雙字幕))
17:42
- that is giving nutrients from alder and birch trees
不斷提供赤楊、白樺樹、鐵杉、檜木、 that is giving nutrients from alder and birch trees
BBC Breakfast
18:17
- Chelsea Flower Show 2006 Philippa Forrester - Alder Hey
2006年切爾西花展 Philippa Forrester - Alder Hey.
讓我們度過2020年的100件事 (100 Things That Got Us Through 2020)
04:10
- - Alder Melcher playing music live on Instagram.
- Alder Melcher在Instagram上現場演奏音樂。
新的一年的小工具 (A new year of gadgets)
12:25
- And they have a new chip that's called Alder Lake
他們有一種新的芯片，叫做Alder Lake。
Diels-Alder: endo rule | 有機化學 | 可汗學院 (Diels-Alder: endo rule | Organic chemistry | Khan Academy)
09:56
- But first, let's just think about our Diels-Alder reaction without any stereochemistry.
但首先，讓我們考慮一下沒有任何立體化學的 Diels-Alder 反應。
- It turns out the endo product is the preferred product most of the time, and this is called the endo rule, or the alder endo rule, and it's thought to be due to an interaction between the developing pi bond, which occurs between these two carbons, and the carbonyl groups, so the carbonyl groups for our aldehyde here, and even though I didn't put in the carbonyls, we know that these red spheres here symbolize those aldehydes, and so there's an interaction between the developing pi bond and those carbonyls, which stabilizes the dienophile approaching in this way, and that gives us our aldehydes down in space.
事實證明，內向產物在大多數情況下都是首選產物，這就是所謂的內向規則，或榿木內向規則，它被認為是由於正在形成的π鍵（發生在這兩個碳和羰基之間）和羰基（我們這裡醛的羰基）之間的相互作用造成的、雖然我沒有寫入羰基，但我們知道這些紅色的球體象徵著這些醛，是以正在形成的π鍵和這些羰基之間存在相互作用，從而以這種方式穩定了親二烯烴的方式，這就產生了我們空間中的醛。
