91av

ACROSS

9 Savoury taste, associated with monosodium glutamate (5)

10 Viral respiratory tract infection (9)

11 Surgical stitches (7)

12 Green variety of beryl (7)

13 See 1 Down

15 Abbreviated name for a trigonometric function (3)

16 The Greek letter ψ (3)

17 1 + 1, for example (3)

19 Concept arising from the second law of thermodynamics (7)

20 Unit of energy and work equal to 10-7 joules (3)

23 See 2 Down

24 Substance released by most cephalopods (3)

25 Type of synthetic polyester resin (5)

27 Woody shrub widely cultivated for its starchy root (7)

29 Researcher who has done a PhD (7)

32 Nd (9)

33 Asian tree, or the oleoresion harvested from it (5)

DOWN

1/13A/14 ___, ___ and ___, 1997 work by Jared Diamond (4,5,5)

2/23 A Triglyceride pressed from the seeds of the plant Ricinus communis (6,3)

3 ___ paradox, logical conundrum concerning truth and falsity (4)

4 Basic input/output system (4)

5 Tremor following an earthquake (10)

6 ___ cupboard, a laboratory ventilation device (4)

7 Term describing alien species such as a grey squirrel or zebra mussel (8)

8 The Chemical History Of A ___, lecture series given by Michael Faraday in 1848 (6)

13 Fundamental state of matter (3)

14 See 1 Down

15 C₆H₈O₇ (6,4)

16 Chordata, Arthopoda and Mollusca, for example (5)

18 Name given to the Apollo space programme (8)

21 “___ does not play dice” – statement on uncertainty attributed to Albert Einstein (3)

22 Prefix that might go before -phobe, -logical or -babble (6)

26 Vertebrate organ fed by the renal artery (6)

28 ___ nitrite, C₅H₁₁ONO (4)

29 Device that might be impulse, gravity or positive displacement (4)

30 Science, technology, engineering and mathematics (4)

31 Tesla ___, invention of 1891 used to produce high-voltage alternating current (4)