... the
main
motive
for
using
the
D-threose derivative
2 in the
synthesis?
•
Attempts
at
carrying
out the
sequence depicted
in
step
e
with
the
benzyl
protecting
group originally ... u.
Further
Reading
• For
studies
on the
regioselectivity
in
epoxide opening, see:
M.
Chini,
P.
Crotti,
L. A.
Flippin,
C.
Gardelli,
E.
Giovani,
F.
Macchia,
M.
Pineschi,
J.
Org. Chem., ... Stereoselective
Total Synthesis
of
(+)-Artemisinin
Further Reading
• For an
analysis
of
recent syntheses
of
artemisinin, see:
M. G.
Constantino,
M.
Beltrame
and G. V. J.
Dasilva, Synth....
... hours since my sister last rung D. My sister hasn’t rung since hours.
11. Mary prefers to dance rather than sing.
A. Mary prefers to dance than to sing. B. Mary prefers dancing than sing.
C. ... prefers dancing than to sing. D. Mary prefers dancing to singing.
12. It took him two hours to do his homework.
A. He spent two hours to do his homework. B. He spent two hours doing his homework.
C. ... two years since Mary began studying Vietnamese. D. All are correct
14. I started going to school in 1997.
A. I haven’t been a pupil when it was in 1997. B. I have been a student since 1997.
C....
... soon plunge the "gifted" man into financial ruin. Can you
explain the meaning of red herring"? The original red herrings were strong-smelling fish that the
fox hunters of Old ...
Family in United Kingdom. 11. It was cold Saturday morning at beginning of month.
first snap of frost was in air, after mild October of Indian-summer weather. But
nonetheless, it was sparkling ... We can fall into a black mood, a
purple passion, or a blue funk; when things start looking up, we feel in the pink.
Even the animal world gets painted by the colouring of human imagination.
Have...
... in figure 33.3
Alexander−Strete−Niles:
Lab Exercisesin
Organismal and Molecular
Microbiology
VI. Controlling the Risk and
Spread of Bacterial
Infections
28. Skin Disinfection:
Evaluating ... coli
Alexander−Strete−Niles:
Lab Exercisesin
Organismal and Molecular
Microbiology
VI. Controlling the Risk and
Spread of Bacterial
Infections
30. Bacteriological
Examination of Drinking
Water Using the MPN ... Kitchen
Boiling water has been used for a long time around the
home in cooking and disinfecting items, such as baby
bottles and canning jars. Drinking water may also
require boiling on occasion....
... 7 tips for writing in English! 7 mẹo nhỏ cho việc học Viết tiếng Anh
Viết là một trong những kỹ năng ngôn ngữ tương ... advice to you is always to remember to take an umbrella; you never know when it might
rain.
• Ngắn: Don't forget to take an umbrella.
4. Dùng câu rõ ràng
Nếu bạn có nhiều ý muốn diễn đạt thì ... biến
Dùng những từ mà hầu hết mọi người đều biết và hiểu nghĩa.
Ví dụ:
• Từ lạ: It was a blistering day.
• Từ quen thuộc: It was a hot day.
3. Dùng câu ngắn
Viết ngắn, đơn giản và đi thẳng vào...
... to
begin!"
look into (inseparable): investigate / get more details about
something: sprawdzić, zbadać.
"Someone said there was a meeting at 9:30 but I haven't
heard anything about ... less thin; gain weight:
zaokrąglać się, wypełniać
"Jerry used to be really skinny, but in the last year he's
begun to fill out."
find out (about) (inseparable): learn / get information
(about): ... the meeting had been
cancelled. I didn't find out (find out about it) myself until just
a few minutes ago."
get across (separable): make something understood;
communicate something understandably:...
... minute 492 tire
391
appear
442
strong
493
bring
392
road
443
special
494
yes
393
map
444
mind
495
distant
394
rain
445
behind
496
fill
395
rule
446
clear
497
east
396
govern
447
tail
498
paint
397
pull
448
produce
499
language
398
cold
449
fact
500
among
399
notice
450
street
400
voice
451
inch
401
unit
452
multiply
402
power
453
nothing
403
town
454
course
404
fine
455
stay
405
certain
456
wheel
406
fly
457
full
407 ... Word
251
open
297
color
343
told
252
seem
298
face
344
knew
253
together
299
wood
345
pass
254
next
300
main
346
since
255
white
301
enough
347
top
256 children 302 plain 348 whole
257
begin
303
girl
349
king
258
got
304
usual
350
space
259
walk
305
young
351
heard
260
example
306
ready
352
best
261
ease
307
above
353
hour
262
paper
308
ever
354
better
263
group
309
red
355
true ... 738
garden
639
roll
689
bottom
739
equal
640
temperature
690
key
740
sent
641
finger
691
iron
741
choose
642
industry
692
single
742
fell
643
value
693
stick
743
fit
644
fight
694
flat
744
flow
645
lie
695
twenty
745
fair
646
beat
696
skin
746
bank
647 excite...