structure of essay pdf
Tài liệu Gravitational Physics: Exploring the Structure of Space and Time pdf
Ngày tải lên :
12/02/2014, 16:20
... Small-Scale Structure of Space and Time. The union of the two most
significant developments of 20th-century physics—general relativity and quan-
tum theory—is one of the greatest challenges of contemporary ... properties of the geometry of space in the vicinity of
black holes that are predicted by general relativity.
• The measurement of the dragging of inertial frames due to the rotation of
Earth at ... some of the important
achievements of the past decade illustrates this point:
• The confirmation of the existence of gravitational waves by the observed
shortening of the orbital period of a...
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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
... conformation
around the active site of ApeSOD is independent of
the presence of a metal cofactor.
Figure 3D shows the superimposition of the active
site structures of apo, Mn-bound and Fe-bound Ape-
SODs. ... (Fig. 3A). Three of the ligands,
OD2 of Asp165, NE2 of His79 and NE2 of His169,
formed an equatorial plane. The other protein ligand,
NE2 of His31, bound to the metal, in the company of
a water oxygen, ... in the presence
of either Fe or Mn. These types of SODs are referred
as to cambialistic SODs. In addition to the tertiary
structures of metal-specific SODs [4], crystal structures
of several cambialistic...
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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
... proportion of
whiteandAsiangraduateswithineachcategory of number of yearsworkedwasnotashigh
asthat of otherracegroupsatthetime of thesurvey(Table8).
Table8:Number of yearsworkedbythoseinmanagement,byrace
Number of yearsworked
Asian ... 7,5
Sector of employmentTherole of thepublicsectorasanemployeris of particular
interest.Itisthefirstsector of employmentforalargeproportion of graduatesirrespective
of field of study,raceandgender.ThisisespeciallytrueforAfricangraduateswhomake
up ... whose
labourmarketoutcomesarecomparativelypoor(thisisnotuniquetoSouthAfrica).
Thelargemajority of thesegraduatesareAfrican.Hence,tosomeextent,itwouldbe
expectedthattheseinstitutionswouldshowlowerlevels of successwithregardtothe
employability of theirgraduates.However,thereareunexplaineddifferencesaswell.
Irrespective of field of study,raceorgender,studentsfromHWUsseemtohavemore
successinthelabourmarket.Apossibleexplanation of thesedifferencesmaylieinthe
differingquality of educationintheseinstitutions,whetherperceivedorreal.
Differences...
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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
... Department of Biochemistry, University of Leicester, UK
2 CNAP, Department of Biology, University of York, UK
Pentaerythritol tetranitrate (PETN) reductase was ori-
ginally purified from a strain of Enterobacter ... analysis of the titration of H181A PETN reductase with progesterone. (C) Plot of absorbance change as a function of 2,4 dinitrophenol
concentration for the data shown in (A). (D) Plot of absorbance ... formed
directly by the binding of free steroid from solution.
Discussion
A number of crystal structures are now available for
members of the Old Yellow Enzyme family [2,3,24,33–
35]. Each of these indicates...
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Tài liệu Báo cáo khoa học: Endotoxic activity and chemical structure of lipopolysaccharides from Chlamydia trachomatis serotypes E and L2 and Chlamydophila psittaci 6BC pdf
Ngày tải lên :
20/02/2014, 23:20
... 6BC, the chemical structures of which
are already known [12,13]. The negative ion MALDI-TOF
mass spectrum of the native LPS (Fig. 1) exhibited a
complex pattern of several groups of ion peaks representing
molecular ... of
trachoma and there is an ongoing discussion on the putative
role of Chl. pneumoniae in the development of atheroscler-
osis which is also a chronic inflammation of the arterial walls.
One of ... spectroscopy (Figs 5 and 6)
and assignment of all signals (Table 2) revealed that the
carbohydrate structure of the major component of C. tra-
chomatis E LPS consisted of three Kdo- and two GlcpN-
residues....
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Tài liệu Báo cáo khoa học: "The Structure of User-Adviser Dialogues: Is there Method in their Madness?" pdf
Ngày tải lên :
21/02/2014, 20:20
... AND DIALOGUE STRUCTURES
227
Gross and Sidner (1985) distinguishes three structures in a
discourse structure: 1) the structure of the sequence of utterances,
2) the structure of the intentions ... about the nature of
dialogue structures, about the validity and usefulness of the
concept of a dialogue structure, about the role of the task
structure in determining dialogue structure, and ...
The goal of this paper is to find evidence for the validity of
the notion of discourse structure derived from the task structure
by: 1) describing a technique to derive the structure of dialogues...
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Báo cáo khoa học: Crystal structure of salt-tolerant glutaminase from Micrococcus luteus K-3 in the presence and absence of its product L-glutamate and its activator Tris pdf
Ngày tải lên :
06/03/2014, 09:22
... atoms
of liganded and unliganded structures of Bacillus glutaminase are
superimposed. Displacement of 55 aa for Bacillus glutaminase
(327 aa) is not shown because of the disordered regions in the
structures. ... residues; F, major fragment of Mglu; G, presence of
L-glutamate; Mglu, Micrococcus glutaminase; PDB, protein data bank;
N, absence of additives; T, presence of Tris; TG, presence of Tris +
L-glutamate.
738 ... mechanism of Bacillus glutaminase
[5]. The structure of Bacillus glutaminase that cova-
lently binds 5-oxo-l-norleucine (PDB 3brm) mimics
that of the acyl-enzyme intermediate, while the Mglu
TG structure...
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Báo cáo khoa học: MR solution structure of the precursor for carnobacteriocin B2, an antimicrobial peptide fromCarnobacterium piscicola Implications of the a-helical leader section for export and inhibition of type IIa bacteriocin activity pdf
Ngày tải lên :
07/03/2014, 15:20
... purple.
Fig. 4. Superimposition of preCbnB2 structures. (A) Superimposition
of the backbone of the leader peptide a-helix for 20 structures. (B)
Superimposition of the backbone of helix 2. Both helix ... help determine the structural basis of the
inhibition of the antimicrobial activity of CbnB2 by the
leader and to assist future analysis of the interaction of
preCbnB2 with its ABC transporter ... preferred geometry of the
precursor. We now report the chemical synthesis, bio-
chemical production, and solution structure of preCbnB2,
and compare it with the structure of the mature
bacteriocin,...
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Báo cáo khoa học: Covalent and three-dimensional structure of the cyclodextrinase from Flavobacterium sp. no. 92 pdf
Ngày tải lên :
08/03/2014, 02:20
... factor of 18.8% and an R
free
of 22.3%
with over 90% of the residues in the most favored region of
a Ramachandran plot (Table 2). The resulting model is
depicted in Fig. 2. The Ca backbones of the ... group.
As the polypeptide superposition of Fig. 8 places the
three catalytic residues of CDase (Fig. 1) within less than
1A
˚
of the positions of those of TVA-II, and as the active
centers closely ... domain of the other subunit,
which restricts the size of the B domain (Fig. 7).
Active center
The active center of CDase is depicted in Fig. 8, which
includes the superimposed structure of a TVA-II...
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Báo cáo khoa học: "Understanding the thematic structure of the Qur’an: an exploratory multivariate approach" pdf
Ngày tải lên :
08/03/2014, 04:22
...
following:
“Figure 6. Plot of groups C and D”
Results from figure 6 are also supportive of the
thematic structure of each group. Suras of group C
are more abundant in the use of narratives and
addressing ... following plot of number of content words per
sura, sorted in order of descending magnitude.
“Figure 1. Plot of number of words per sura”
Clearly, given a word with some probability of
occurrence, ... thematic structure of
the Qur’an based on a fundamental idea in
data mining and related disciplines: that,
with respect to some collection of texts,
the lexical frequency profiles of the
individual...
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Báo cáo Y học: Crystal structure of the catalytic domain of a human thioredoxin-like protein pdf
Ngày tải lên :
08/03/2014, 22:20
... structure of hTRXL-N, 2–108), 2TRX (crystal structure of E. coli thioredoxin, 1–108), 1ERU and 1ERT
(crystal structure of oxidized and reduced human thioredoxin, 1–105), 1DBY (NMR structure of ... little direct
effect on the activity of the enzyme. The function of this
unique C-terminal domain remains unknown.
Overall structure
Crystals of the catalytic domain of hTRXL (hTRXL-N)
were obtained ... consisting of b
sheets shows little difference with other TRX (Fig. 3B).
Active site
The location of the active site in all of the known
thioredoxin structures is identical. It includes the end of
b-2,...
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Báo cáo khoa học: Structure of FocB – a member of a family of transcription factors regulating fimbrial adhesin expression in uropathogenic Escherichia coli pdf
Ngày tải lên :
15/03/2014, 23:20
... helices form
Structure of FocB U. W. Hultdin et al.
3370 FEBS Journal 277 (2010) 3368–3381 ª 2010 The Authors Journal compilation ª 2010 FEBS
Structure of FocB – a member of a family of transcription
factors ... motif of the ParB homolog
KorB. Nat Struct Mol Biol 11, 656–663.
57 Van Duyne GD, Standaert RF, Karplus PA, Schreiber
SL & Clardy J (1993) Atomic structures of the human
Structure of FocB ... Leu13-Leu76
of the protein matched residues Ser27-
Ala93 of FocB with a z-score of 5.1
(Table 2). The structures are shown in two
orientations. The visual alignment is based
on the position of the...
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Báo cáo khoa học: Monomeric solution structure of the helicase-binding domain of Escherichia coli DnaG primase pdf
Ngày tải lên :
16/03/2014, 12:20
... helix 6 of E. coli DnaG-C observed in the
crystal structure (Fig. 3D,E) raise questions about the
flexibility of helix 6 of E. coli DnaG-C in solution.
Structure verification of helix 6 of DnaG-C
An ... more than half of them.
The present structure of monomeric E. coli DnaG-C
identifies the earlier crystal structure of the same pro-
tein as a domain-swapped dimer, in which helix 5 of
one monomer ... core of the structure.
The solution structure of DnaG-C identifies the crystal
Fig. 2. Sequence alignment of DnaG-C with homologs from different bacterial species. The sequence numbering of E....
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Báo cáo khoa học: Crystal structure of human cystatin C stabilized against amyloid formation pdf
Ngày tải lên :
22/03/2014, 21:20
... of the L68Q
mutation for the stability of monomeric HCC could
only be inferred from the structures of 3D domain-
swapped dimers of HCC. The present structure pro-
vides the first possibility of ... domain-swapped dimer of HCC shows unaltered
inhibition of legumain, whereas it is incapable of
papain binding, because of the absence of the L1 ele-
ment of the recognition site [4]. The backbones of mol-
ecules ... lack of
sequence conservation, i.e. the fact that the VPWQ
motif of HCC is replaced by LPHE in stefin B. An
additional factor may be the involvement of loop L2 of
both molecules in the HCC-stab1 structure...
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Báo cáo khoa học: X-ray structure of glucose/galactose receptor from Salmonella typhimurium in complex with the physiological ligand, (2R)-glyceryl-b-D-galactopyranoside pdf
Ngày tải lên :
23/03/2014, 04:21
... 308–309 of the complete sequence in both
molecules of the asymmetric unit. The structure is
composed of two similar domains, each representing a
b sheet sandwiched between two layers of a helices
(Fig. ... helices of domains 1 and 2, respectively. The
EF-hand-like calcium site of domain 2 was described
earlier, and tight binding of the ion was shown to con-
tribute to the integrity of the protein structure ... Least-squares
superimposition of domain 1 of all of the GBP struc-
tures is shown in Fig. 5B, illustrating the ‘fan’ of
related conformations observed. The GGal complex is
the most closed structure found to...
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