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Τι (ποιος) είναι work up - ορισμός
PROCEDURES FOR ISOLATING AND PURIFYING PRODUCTS OF A CHEMICAL REACTION
Workup (chemistry); Work-up (chemistry)
work up
1.
If you work yourself up, you make yourself feel very upset or angry about something.
She worked herself up into a bit of a state...
Don't just lie there working yourself up, do something about it.
PHRASAL VERB: V pron-refl P into/to n, V pron-refl P
see also worked up
2.
If you work up the enthusiasm or courage to do something, you succeed in making yourself feel it.
Your creative talents can also be put to good use, if you can work up the energy...
PHRASAL VERB: V P n (not pron)
3.
If you work up a sweat or an appetite, you make yourself sweaty or hungry by doing exercise or hard work.
You can really work up a sweat doing housework...
PHRASAL VERB: V P n (not pron)
4.
If you work up something such as a piece of writing, you spend time and effort preparing it.
I sketched the layout of a prototype store and worked up a business plan...
PHRASAL VERB: V P n (not pron)
work up
v.
1) (d; refl., tr.) ('to excite') to work up into (he worked himself up into a rage)
2) (d; refl., tr.) ('to incite') to work up to (the orator worked the crowd up to a fever pitch)
3) (misc.) she worked her way up to the top
Work-up
In chemistry, work-up refers to the series of manipulations required to isolate and purify the product(s) of a chemical reaction.
Βικιπαίδεια
Work-up
In chemistry, work-up refers to the series of manipulations required to isolate and purify the product(s) of a chemical reaction. The term is used colloquially to refer to these manipulations, which may include:
- deactivating any unreacted reagents by quenching a reaction.
- cooling the reaction mixture or adding an antisolvent to induce precipitation, and collecting or removing the solids by filtration, decantation, or centrifugation.
- changing the protonation state of the products or impurities by adding an acid or base.
- separating the reaction mixture into organic and aqueous layers by liquid-liquid extraction.
- removal of solvents by evaporation.
- purification by chromatography, distillation or recrystallization.
The work-up steps required for a given chemical reaction may require one or more of these manipulations. Workup steps are not always explicitly shown in reaction schemes. Written experimental procedures will describe work-up steps but will usually not formally refer to them as a work-up.
Παραδείγματα από το σώμα κειμένου για work up
1. Were going to move -- keep moving back and work up to the front.В Yes.
2. "He was forced to work up quite a sweat trying to drum it into action.
3. You‘re supposed to work up to knocking off five miles a day without too much trouble; your weekly long runs are supposed to work up to a peak of about 20 miles about three weeks before the race.
4. We‘re going to move –– keep moving back and work up to the front. Yes.
5. State hospital doctors currently work up to 80 hours a week.