structure of the atom review
Bài giảng Chapter 7 The Quantum-Mechanical Model of the Atom
Ngày tải lên :
28/11/2013, 01:11
... measure of how intense the light is
– the larger the amplitude, the brighter the light
ã
the wavelength, () is a measure of the distance
covered by the wave
the distance from one crest to the ... proportional to the amplitude
and frequency of the waves
the larger the wave amplitude, the more force it has
the more frequently the waves strike, the more total
force there is
Tro, Chemistry: ... Waves
ã
the frequency, () is the number of waves that
pass a point in a given period of time
the number of waves = number of cycles
units are hertz, (Hz) or cycles/s = s
-1
1 Hz = 1 s
-1
ã
the...
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Tài liệu Báo cáo khoa học: Crystal structure of the cambialistic superoxide dismutase from Aeropyrum pernix K1 – insights into the enzyme mechanism and stability pdf
Ngày tải lên :
14/02/2014, 22:20
... counted the interactions, we excluded all residues
involved in the binding of the metal cofactor.
ApeSODs in different forms were superimposed with the
least square fit of Ca atoms of the residues ... the ter-
tiary structure of ApeSOD has not been elucidated.
In the present study, for the first time, we describe the
crystal structure of ApeSOD. In particular, we focus
on the coordination of ... ligand,
NE2 of His31, bound to the metal, in the company of
a water oxygen, from the apical positions. The manga-
nese was only 0.06 A
˚
out of the equatorial plane
(Table 3). The angles around the metal...
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Tài liệu Inequalities in Higher Education and the Structure of the Labour Market pdf
Ngày tải lên :
15/02/2014, 17:20
... especially
thosewhoholdgeneralbachelor’sdegrees,theirqualificationsserveonlyasasignal
of theirpotentialtoemployers.Inmanycases,theytakelongertorealiseemployment
andwhentheydotheirentryleveljobsdonotnecessarilyrequire the years of schooling
theypossess.Theystartat the bottom of the jobladderandhavetoprovethemselves
in the labourmarkettoreachhigherincomelevels.Acombination of theirpotential
andtrainingwilldeterminetheirprogressionup the ladder.Aswillbeseenin the next
section, the field of study,whichsignals the type of skillsacquiredthrougheducation,
playsasignificantroleinemployability of universitygraduatesinthiscase.
PercyMoleke
Free ... 4
PercyMoleke
5
InequalitiesinHigherEducationand the Structure of the LabourMarket
Despite the observedsignificantincreasesin the number of seniorcertificateholders
in the pastdecade, the proportion of learnerswhoactuallysitfor the examremains
low. The quality of the seniorcertificateexamalsocontinuestobe of concern. The
largemajority of learnersstillopttowrite the seniorcertificateexamon the standard
graderatherthanon the highergrade.Consequently, the proportion of thosepassing
with ... 14
PercyMoleke
15
InequalitiesinHigherEducationand the Structure of the LabourMarket
ineducationorin the labourmarket,havedonelittletoaddress the inequalities of
the past. The lack of labour marketinformation...
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Tài liệu High-level Expert Group on reforming the structure of the EU banking sector docx
Ngày tải lên :
16/02/2014, 10:20
... to the
intensification of the sovereign debt crisis in the euro area. The pricing of risk in the repo market has
become more dependent on the geographic origin of both the counterparty and the ... maintaining the
integrity of the single market.
Finally, Chapter 5 draws together the analysis of the previous chapters. It reiterates the importance
of banks in the EU economy, summarises the key ... mandate, the Group also expects the on-going fundamental review of
the trading book by the Basel Committee to improve the control of market risk within the banking
system.
The Group sees the Commission's...
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Tài liệu Báo cáo khoa học: Structure of the putative 32 kDa myrosinase-binding protein from Arabidopsis (At3g16450.1) determined by SAIL-NMR docx
Ngày tải lên :
18/02/2014, 14:20
... of SAIL
Fig. 3. Secondary structure of At3g16450.1. (A) Ribbon representa-
tion of the NMR structure of At3g16450.1. These figures were pre-
pared using
MOLMOL [25]. Due to the lack of NOEs, the ... constraints.
Solution structure of SAIL At3g16450.1
Assignment of the NOE peaks of At3g16450.1 and the
structure determination were accomplished by use of
the cyana program [17,18]. The structural statistics ... Three-dimensional NMR structure of At3g16450.1. (A)
Superposition of the 20 energy-minimized conformers that repre-
sent the 3D solution structure of the N-terminal domain. (B) Super-
position of conformers...
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Tài liệu Báo cáo khoa học: Crystal structure of the catalytic domain of DESC1, a new member of the type II transmembrane serine proteinase family pptx
Ngày tải lên :
19/02/2014, 00:20
... reveals
that the most similar regions of these proteinases medi-
ate interaction of the two b-barrels, formation of the
catalytic machinery and structures required for binding
of the main chain of the ... Asp189 at the bottom of the pocket determines
the specificity of the S1 pocket for basic residues Arg
and Lys at position P1 of the substrate. Consequently,
in the DESC1 complex structure the bound ... below). The southern boundary of
the active site cleft of DESC1 is formed by the 145
autolysis loop. The backbone of this loop differs mark-
edly from the other serine proteinases, making the act-
ive...
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Tài liệu Báo cáo khoa học: Crystal structure of the BcZBP, a zinc-binding protein from Bacillus cereus doc
Ngày tải lên :
19/02/2014, 00:20
... determines the shape of the
active site entry. (e) The structure of the active site is
essentially identical with the active sites of the MshB
and LpxC proteins. The conservation of catalytically
important ... moiety. The protein
coordinates zinc with the N
d
atom of His12, one of the
O
d
atoms of Asp15 and the N
e
atom of His113.
His113 protrudes from helix a4 whereas His12 and
Asp15 both belong to the ... studying the corresponding
proteins of B. anthracis because it lacks infectiousness
of the latter. The objective of the present study is to
shed light on the structure, function and the structure
function...
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Tài liệu Báo cáo khoa học: Spectroscopic characterization of a higher plant heme oxygenase isoform-1 from Glycine max (soybean) ) coordination structure of the heme complex and catabolism of heme docx
Ngày tải lên :
19/02/2014, 05:20
... information on the heme pocket
structure. As shown in Table 2, the hyperfine splitting
constants of the
15
N nucleus of the distal NO and of
the
14
N nucleus of the proximal His of the GmHO-1
complex ... against
the concentration of azide of each solution. The intersection
point corresponding to the mole fraction of 0.5 of the
respective forms gives the amount of azide necessary to
attain the equilibrium, ... characteristics
of the heme pocket of GmHO-1 might be associated
with the smaller values of K
azide
for GmHO-1 and
SynHO-1, and with the ferric character of the heme.
The K
imidazole
values of the three...
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Tài liệu Báo cáo khoa học: Unusual metal specificity and structure of the group I ribozyme fromChlamydomonas reinhardtii23S rRNA pptx
Ngày tải lên :
19/02/2014, 07:20
... the large P6
extension and the last three nucleotides (AU XG) of the intron. The
sizes of the intron (InDG
b
) and 5Â exon (5E) are indicated. The arrow
indicates cleavage of the pre-RNA at the ... Because of these
and other properties of Cr.LSU, the tertiary structure of the intron from
23S.5DG
b
was examined using Fe
2+
-EDTA cleavage. The ground-state
structure shows evidence of an unusually ... minimum of n Mg
2+
ions leads to formation of the
active complex, whereas binding of a minimum of m
Mn
2+
ions forms the inactive complex. The sizes of
the active and inactive fractions are the result...
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Tài liệu Báo cáo khoa học: Proton transfer in the oxidative half-reaction of pentaerythritol tetranitrate reductase Structure of the reduced enzyme-progesterone complex and the roles of residues Tyr186, His181 and His184 pdf
Ngày tải lên :
20/02/2014, 02:21
... confirming that
the mutation of Tyr186 to Phe186 does not grossly perturb the
overall framework of the enzyme or the active site. The active sites
of the enzymes are shown in stick format with the sigmaA ... bond in
close proximity of the N5 atom. A putative flipping
motion of the progesterone molecule along an axis
parallel to the FMN plane aligns the C1-C2 with the
plane of the isoalloxazine ring ... and is similar to the structure of the
oxidized enzyme-inhibitor complex. The reactive C1-C2 unsaturated bond
of the steroid is inappropriately orientated with the flavin N5 atom for
hydride transfer....
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Tài liệu Báo cáo khoa học: Solution structure of the matrix attachment region-binding domain of chicken MeCP2 ppt
Ngày tải lên :
21/02/2014, 00:20
... [18]. The structure of the helical
coil a
2
/a
3
allows us to interpret the consequences of the
six mutations. As P153(152) and G162(161) are buried in
the protein core, replacement of each of these ... cluster in these two regions. Know-
ledge of the structure of a larger portion of MeCP2
including the transcriptional repression domain would
resolve these speculations and clarify the role of the
helical ... subsequent
structure calculations. These newly calculated structures
were then used for the next step in the iteration process. This
procedure was continued until the quality of the structure
could...
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Tài liệu Báo cáo khoa học: The structure of the carbohydrate backbone of the lipopolysaccharide from Acinetobacter baumannii strain ATCC 19606 docx
Ngày tải lên :
21/02/2014, 03:20
... 269) 427
[26,27]. Then, the biosynthesis of the core region of LPS
from A. baumannii strain ATCC 19606 should proceed with
the introduction of a third Kdo residue to O-5 of the second
Kdo. This ... [19]. The mechanism of
the transfer of the third Kdo residue has not yet been
identiđed.
In addition to the work on the determination of the
chemical and antigenic structures of O-speciđc polysaccha-
rides ... genus which
obviously allows novel insights in structure, genetics and
biosynthesis of LPS. Here, the structures of the carbohy-
drate backbones of the LPS from A. baumannii strain
ATCC 19606 are...
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Tài liệu Báo cáo Y học: Structure of the O-polysaccharide and classification of Proteus mirabilis strain G1 in Proteus serogroup O3 potx
Ngày tải lên :
21/02/2014, 15:20
... has the
D
configuration.
On the basis of the data obtained, it was concluded that
the O-polysaccharide P. mirabilis G1 has the structure
shown in Fig. 3. This structure is similar to that of the
O-polysaccharide ... experi-
ments. The following structure of the polysaccharide was
established:
where
D
-GalA6(
L
-Lys) stands for N
a
-(
D
-galacturonoyl)-
L
-lysine. The structure of the O-polysaccharide of
P. mirabilis ... relatedness of P. mirabilis G1 and S 1959
correlated with the similarity of the chemical structures of
their O-polysaccharides (Fig. 3). Therefore, it is reasonable
to classify P. mirabilis G1 into the...
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Tài liệu Báo cáo Y học: Solution structure of the mEGF/TGFa44250 chimeric growth factor doc
Ngày tải lên :
22/02/2014, 07:20
... of the standard
cysteine residue in the
DYANA library [53]. A pseudoatom
was included instead of the HG atom and a bridge was
formed by superimposition of the pseudoatoms on the SG
atoms of the ... found.
Several of these were identified in previous studies of EGF,
and the backbone fold of the chimera is clearly similar to
those of the EGF structures. The presence of a backbone
hydrogen bond from the ... the
calculation of the chimera structure, this provides strong
evidence that the overall structure is unchanged by the
modification of the sequence.
Given that the solution structure of mEGF/TGFa
44250
was...
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