Дефисы нужны везде: A 25-second-long delay, a 5-m-thick layer, a 1-liter-bottle, etc.
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THOSE WHO WANT THIS STYLE GUIDE IN FULL (WORD FILE, 50 станиц полезных справок) PLEASE APPLY TO iegorov@moscow.oilfield.slb.com ПРИШЛЮ БЕСПЛАТНО.Hyphenation of Unit Modifiers
Hyphenate unit modifiers in order to avoid ambiguity. Unit modifiers are two or more words used as an adjective. They may consist of any of the following:
1. а noun and an adjective
time-dependent reaction radiation-sensitive compound
2. an adjective and an adverb
above-average results still-unproven technique
3. two nouns, where one noun modifies the other
ion-exchange resin charge-transfer reaction
4. а noun and а verb or а present or past participle
air-equilibrated samples laser-induced species
Note: If you can insert and between the modifiers and the construction makes sense, they do not form а unit modifier and should be joined by an en dash.
Hyphenate unit modifiers used as predicate adjectives. In general, only unit modifiers that consist of nouns and adjectives can be used as predicate adjectives.
In these cluster reactions, dehydrogenation is size-dependent.
The reaction is first-order.
Use a hyphen after each of same-base unit modifiers if their number is more than one.
25- to 50-mg samples 0.5- to 10-cm tube
high-, medium-, and low-frequency measurements
Hyphenate unit modifiers containing а number, а unit of measure, and а word.
3-year-old child 4-m-thick layer Do not hyphenate unit modifiers in the following instances:
(1) if the first word of the unit modifier is an adverb
recently developed procedure very well studied hypothesis
(2) if the unit modifier is а chemical name
barium sulfate precipitate sodium hydroxide solution
(3) if one of the words in the unit modifier is а proper name (note, however, that а suffix to а proper name should be hyphenated)
Lewis acid catalysis Schiff base measurement but Schottky-type defects
(4) if the first word of the unit modifier is а comparative or superlative
higher temperature reactions lowest frequency wavelengths
(5) use an en dash in place of а hyphen when adding а prefix or suffix to more than one word, i.е. to an open compound.
рrе–World War II history copper oxide–based solution
Do not hyphenate foreign clauses used as adjectives.
in vivo reactions ad hoc committee in situ evaluation
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