electron microscopy - UK

Tossup

Preventing the use of rotationally symmetric static fields in this technique can help overcome a limit set by Scherzer’s theorem. The “spot-scan” technique is sometimes used to prevent beam-induced motion in this larger technique. Samples in this technique may use heavy metals such as tungsten and osmium to undergo a “negative stain.” (10[2])The development of a form of this technique, for which Dubochet, Frank, and Henderson were awarded the 2017 (10[1])Nobel Prize in Chemistry, generated a “resolution revolution.” (10[1])In a form of this technique, the observed specimen is embedded in vitrified ice before being mounted on a grid and fixed via plunging in liquid ethane. For 10 points, (10[1])name this imaging technique that comes in “scanning,” “transmission,” and (10[3])“cryogenic” types. ■END■ (10[1]0[2])

ANSWER: electron microscopy [or EM; accept cryogenic electron microscopy or cryo-EM or transmission electron microscopy or TEM or scanning electron microscopy or SEM; prompt on microscopy]

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Buzzes

Player	Team	Opponent	Position	Value
Lewis Strachan	Cambridge E	Warwick B	51	10
Oscar Despard	Cambridge A	LSE	51	10
Arya Karthik	Oxford A	Imperial A	69	10
Arvin Boraghi	Cambridge C	Sheffield	77	10
Adsayan Ganesh	Warwick A	Cambridge D	107	10
Joel Dicker	Southampton B	Bristol	117	10
Nathan Easow	Manchester	Cambridge B	117	10
Roselyn Daffin	Southampton A	Oxford B	117	10
Eugenia Tong	Imperial B	NYU C	120	10
Hamish Campbell	Durham	Oxford C	120	0
Benjamin Watson	Oxford C	Durham	120	0

Summary

Tournament	Edition	TUH	Conv. %	Neg %	Average Buzz
Lower Mid-Atlantic	2025-02-01	6	83%	17%	116.00
Midwest	2025-02-01	6	100%	50%	96.50
Northeast	2025-02-01	4	75%	25%	109.33
Overflow	2025-02-01	4	75%	25%	71.67
Pacific Northwest	2025-02-01	2	100%	50%	118.00
UK	2025-02-01	10	90%	0%	91.78
Upper Mid-Atlantic	2025-02-01	8	88%	0%	94.14