DIgest栏目,为你分享最近酒水、饮食的有趣资讯
土豆啤酒
最近,著名啤酒作家Jeff Alworth在其博客中提到了一款复古的啤酒风格:Kartoffelbier。
Kartoffel在德文中的意思是土豆,bier则是啤酒。这是一种用土豆酿制的啤酒(而不是单纯的增味)。而土豆酿造啤酒在逻辑上显然没什么问题:土豆包含淀粉,是很好的糖分来源。而历史上会用土豆来酿酒一般是麦芽短缺的情况下,酿酒师用手头上含糖最高的粮食来酿造,土豆在欧洲大陆是常见的经济作物。
在文章中提到:
He decided on instant mashed potatoes for the grist (15%) a mistake he instantly regretted when it clogged up his mash tun like glue. (In the future he’ll use a waxier variety, boiled, peeled, and cubed.)
REDISCOVERING GERMAN POTATO BEER AND OTHER MISPLACED STYLES
Zoiglhaus Brewing的酿酒师Alan尝试使用对待麦芽的方式去糖化土豆(生土豆不去皮捣碎后加热糖化),遇到了困难。不去皮的生土豆捣碎后加热变得特别黏糊糊。这其实与土豆的淀粉颗粒结构有关系,在生土豆的情况下,淀粉颗粒大且淀粉颗粒表面致密。这两个条件使得土豆的淀粉颗粒难以被糖化,最终导致整锅水变得像浆水一样。[1]
来源:Relationship between granule size and in vitro digestibility of maize and potato starches.
Alan给的建议是使用偏蜡质的土豆(Waxy potato,支链淀粉含量丰富,也容易被淀粉酶分解),去皮,煮熟,切块后再进行出糖糊化。
酒厂精选酒花 vs 自选酒花
最近,以做双盲实验做对比出名的Brulosophy网站,新做了一次双盲实验。他们在文章中提到Bell‘s酒厂在他们自家的店里,售卖由该酒厂酿酒师精选的Centennial酒花,而Bell‘s的拳头产品Two hearted Ale(双心河艾尔,双心河为当地著名的一条河流)正是使用精选的酒花保证了每一批的双心河艾尔都能有如一的品质。Brulosophy作者Marshall Schott想知道这个精选与普通的常规Centennial酒花有者哪些不同,于是做了这次双盲实验。
精选 vs 常规 来源:
实验的结果却与预期有出入,文章中提到:
Each participant was served 1 sample of the beer made with Bell’s Centennial Select and 2 samples of the beer made with standard Centennial hops in different colored opaque cups then asked to identify the unique sample.
A total of 11 tasters (p<0.05) would have had to accurately identify the unique sample in order to reach statistical significance, though only 5 did (p=0.85)
HOP COMPARISON: BELL’S BREWERY CENTENNIAL SELECT VS. STANDARD CENTENNIAL | EXBEERIMENT RESULTS!
作者用三杯盲测的方法。结果是20人中仅有5人尝出了不一样,并不能证明精选与常规有着显著的区别。
不会宿醉但享受醉的快乐
英国卫报报道,神经精神药理学家(Neuropsychopharmacologist)David Nutt在研发一种能够让大家保留酒精带来的快感,但可以减少负面作用(头痛、宿醉)的合成酒精。
David Nutt 来源:
Put very simply, alcohol’s primary brain effect is stimulating the Gaba receptor. When they are stimulated Gaba receptors calm the brain, by firing off fewer neurons. Nutt gave rats alcohol, administered a chemical that blocks Gaba receptors and the rats sobered up.
Could ‘alcosynth’ provide all the joy of booze – without the dangers?
David Nutt还是博士研究生的时候,发觉阻断Gaba神经受体,会使已经摄入酒精的白鼠清醒。但这种阻断Gaba受体的药物在非摄入酒精情况下服用会产生类似于酒精戒断反应所致的癫痫症状(酒精性癫痫)。于是,他做了一个反向操作,他仿效酒精作用Gaba受体的机制,研发一种酒精替代饮品Alcarelle。此产品还未上市,但已经有很多人表示愿意去尝试。
值得一提的是,David Nutt曾多次撰稿及在公开场合表达“酒精的危害”,包括在柳叶刀(Lancet)上发表的文章中提到:酒精对非本体外的其他人危害最大。[2] 尽管如此,他自己则是一个不折不扣的酒精爱好者,睡前一杯威士忌,甚至和女儿合伙开了一间酒吧。
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参考文章:
https://www.beervanablog.com/beervana/2019/3/11/rediscovering-german-potato-beer-and-other-misplaced-styles
http://brulosophy.com/2019/03/25/hop-comparison-bells-brewery-centennial-select-vs-standard-centennial-exbeeriment-results/
https://www.theguardian.com/science/2019/mar/26/an-innocent-drink-could-alcosynth-provide-all-the-joy-of-booze-without-the-dangers?CMP=aff_1432&utm_content=ESI+Media+-+The+Independent&awc=5795_1553696263_461fe0567d20caa12a147d91334b1741
[1] Relationship between granule size and in vitro digestibility of maize and potato starches.
[2] Drug harms in the UK: a multicriteria decision analysis
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