... kháng
khuẩn đối cả cầu khuẩn có hoạt tính B-lactamaza nhiều vi khuẩn Gram âm hầu như
30
2 .5. SẢN XUẤT CÁC - LACTAM BÁN TỔNG HỢP TỪ PENICILLIN G
2 .5. 1. Nhu cầu sản xuất các penicillin bán ... penicillin và các kháng sinh khác thuộc họ -lactam
được xác định là: cấu trúc penicillin có nhiều điểm gần gũi với dipeptit D-alanin-D-
alanin, là hợp phần cấu trúc của lớp peptido-glucan th...
... Zoo 13 3
35 Four Hundred Years of the Telescope 13 7
36 The Merry Dancers 14 1
37 The Fountains of Enceladus 14 5
38 The Herschel Telescope 14 9
39 Onward to the Moon 15 3
1
P. Moore, The Sky at Night, ... Magic 10 3
27 Jodrell Bank: Fiftieth Anniversary 10 7
28 The Grand Collision 10 9
29 Holmes’ Comet 11 3
30 Cosmic Debris 11 7
31 Nearest Star 12 1
32 Th...
... usual, the Selsey weather was kind.
Chapter 2
The Turbulent Sun
The Sun (SOHO)
72 The Turbulent Sun
its surface brightness would be greater than that of an arc-lamp. Spots are usually
associated ... is true for the various orbiters, of which the
latest are Odyssey, Mars Express and MRO. The NASA designers have reasons to
congratulate themselves.
Further, the Cassini pro...
... the astronomers,
and played with great gusto without quite matching the standard of the Royal
Philharmonic. At least the Sky at Night team, their appetites whetted, could look
forward to the ... by Francis Baily at the annular eclipse of
15 May 1 836 , though they had been seen much earlier by MacLaurin at the annular
eclipse of 1 March 1 737 . I did not know wh...
... the rotational poles of the doomed star; the
41
P. Moore, The Sky at Night, DOI 10.1007/978-1 -44 19- 640 9-0_11,
â Springer Science+Business Media, LLC 2010
In the Sky at Night, I have covered ... galaxy, the mass is not
concentrated at the centre, but is spread through the entire system. This explains
why the stars behave in the way that they do, but w...
... helioseismology is the revelation that the Sun spins in a
rather unexpected way. Of course, it has long been known that we are dealing with
differential rotation; at the equator, the rotation period ... programme to two o’clock in the morning. On the
previous month he had forgotten to schedule the Sky at Night at all, with the result that
the programme was trans...
... the
equator bulge out so that in shape Saturn resembles a slightly squashed orange.
The orbital period is 29ẵ years. The axial inclination is slightly greater than that
of the Earth, and the ... Anderson)
P. Moore, The Sky at Night, DOI 10.1007/978-1-4419 -64 09-0_23,
â Springer Science+Business Media, LLC 2010
95
P. Moore, The Sky at Night, DOI 10.1007/978-1-4419...
... fields.
There is no other constellation quite like it.
1 07
P. Moore, The Sky at Night, DOI 10.10 07/ 978 -1-4419-6409-0_ 27,
â Springer Science+Business Media, LLC 2010
In October 20 07, the great radio ... conditions, with the radiant at the zenith or overhead point. In practice,
these conditions are never attained, so that the observed rate is always less than the...
...
across the sky.
1 18 30 Cosmic Debris
The Sun’s family is dominated by the eight planets, from Mercury out to
Neptune, together with their satellites. But we must not forget that there are other ... whether they are totally alien. These
are how things rest at the present. We are confident that dark matter does exist, but
we have not the faintest idea what it is like.
“And...
... Moore, The Sky at Night, DOI 10.1007 /97 8-1-44 19- 64 09- 0_ 39,
â Springer Science+Business Media, LLC 2010
Man reached the Moon in July 196 9; for the 40th anniversary, we obviously had to
look back at ... of the first astronomical observations made with telescopes.
The first of these programmes was the Sky at Night . We decided to look back at some
of the tel...
... immune!
159
P. Moore, The Sky at Night, DOI 10. 1007/978-1-4419-6409-0_40,
â Springer Science+Business Media, LLC 2 010
In July 1969, the first men reached the Moon. They did go “where no men ... people believe that the first living
molecules built up from what was really a kind of chemical “soup” on the surface
of the young Earth; others that is originated in the f...