frohlich interaction of electrons
2 - Interaction of Electrons and Photons
Ngày tải lên :
23/10/2013, 20:15
... V
dN
dE
ẳ
V
hh
1
2cp
3
n
2
r
n
g
ị!
2
dO 2:59ị
Interaction of Electrons and Photons 31
Copyright â 2004 Marcel Dekker, Inc.
2
Interaction of Electrons and Photons
This chapter provides the ... existence
of eigenstates of infinitively large negative n. Since such eigenstates are not
Interaction of Electrons and Photons 21
Copyright â 2004 Marcel Dekker, Inc.
The Hamiltonian for the energy of ... opticalwaveutilizingthestimulatedemissioninamediumwherepopulation
inversionisproducedbyexcitation.Thestateofthemediumwith
populationinversioniscalledthelaser-activestate.Insemiconductor
injectionlasers,populationinversionisrealizedthroughinjectionof
minoritycarrierswithahighenergyinthevicinityofapnjunctionby
supplyingaforwardcurrent.Althoughinthischapterthepossibilityof
enhancementofopticalpowerbystimulatedphotonemissionwasshown
basedonconsiderationofthestatesofanelectronandtheenergy
eigenstatesoftheopticalfield,thisdiscussiondoesnotensurethepossibility
ofenhancementofopticalamplitudeincludingthephase,i.e.,thecoherent
amplificationofanopticalwave.Thepossibilityofcoherentamplification
willbediscussedonthebasisofananalysisusingthedensitymatrixin
Chap.3.Spontaneousemissionalsotakesplaceinparalleltothelaser
action.Itaffectssignificantlythelaserperformances;e.g.,itgivesrisetothe
laseroscillationthresholdandthequantumnoiseintheoutputlight.
REFERENCES
1.W.Heitler,TheQuantumTheoryofRadiation,OxfordUniversityPress,
Oxford(1954).
2.A.Yariv,QuantumElectronics,JohnWiley,NewYork(1967).
3.L.I.Schiff,QuantumMechanics,McGraw-Hill,NewYork(1968).
4.Y.Fujii,OpticalandQuantumElectronics(inJapanese),Kyoritsu,Tokyo(1978).
5.M.SargentIII,M.O.Scully,andW.E.Lamb,Jr,LaserPhysics,Addison-
Wesley,Reading,MA(1974).
6.D.Marcuse,PrinciplesofQuantumElectronics,AcademicPress,NewYork
(1980).
7.K.Shimoda,IntroductiontoLaserPhysics(inJapanese),Iwanami,Tokyo
(1983).
8.P.MeystreandM.SargentIII,ElementsofQuantumOptics,Springer,
Berlin(1991).
9.T.Suhara,QuantumElectronics(inJapanese),Ohmsha,Tokyo(1993).
36Chapter2
Copyright...
- 20
- 297
- 0
Conceptualizing the interaction of class and gender
Ngày tải lên :
01/11/2013, 07:20
... no
``additive effect'' of the amount of hydrogen and the amount of oxygen
on plant growth; the effects are entirely a function of the amount of the
12 3Interaction of class and gender
Rather, ... unpaid domestic labor of women raises the rate of prođt by
lowering the costs of reproducing labor power (since part of the
consumption of workers takes the form of unpaid services of house-
wives). ... various kinds of effects.
In chapters 7, 8 and 9 we will explore several of these forms of
interconnection of class and gender. Chapter 7 discusses the problem of
the class location of married women...
- 10
- 394
- 0
Tài liệu Báo cáo khoa học: Structure and membrane interaction of the internal fusion peptide of avian sarcoma leukosis virus pdf
Ngày tải lên :
19/02/2014, 16:20
... self-assembly of the envelope glycoprotein
of ASLV bound to membrane.
Effects of pH on the secondary structure and membrane
interaction of IFP–wt
Based o n studies on the molecular clustering of EnvA ... our previous finding of a deeper
insertion of t he fusion peptide of HIV-1 gp41 into model
membrane [22], the result of Steffy et al. [31] c orroborates
the assertion that Pro13 of IFP–wt re sides ... outer
leaflet of the membrane.
Our result of variation of fluorescence quenching with the
labelled rhodamine composition (Fig. 4B) i s c ompatible
with the result on t he interactions of soluble...
- 12
- 589
- 0
Tài liệu Báo cáo khoa học: Expression of an a-1,3-glucanase during mycoparasitic interaction of Trichoderma asperellum docx
Ngày tải lên :
19/02/2014, 16:20
... important aspects of their
antagonistic activity. In addition, the role of Tricho-
derma spp. in the interaction with plants has recently
been reviewed [9]. The increase in knowledge of
Trichoderma ... pathogenic fungi.
Mycoparasitism, one of the main mechanisms involved in the antagonistic
activity of Trichoderma strains, depends on the secretion of complex mix-
tures of hydrolytic enzymes able to ... mycoparasitic interaction of Tri-
choderma harzianum with its host. Fungal Genet Biol 26,
131–140.
36 Corte
´
s C, Gutierrez A, Olmedo V, Inbar J, Chet I &
Herrera-Estrella A (1998) The expression of...
- 7
- 552
- 0
Tài liệu Báo cáo khoa học: Insights into the interaction of human arginase II with substrate and manganese ions by site-directed mutagenesis and kinetic studies Alteration of substrate specificity by replacement of Asn149 with Asp docx
Ngày tải lên :
20/02/2014, 02:21
... interaction, as
that observed in arginase I [9]. Differences in the bind-
ing of the a-carboxylate and a-amino groups of BEC
were also ascribed to the larger volume of the active
site cleft of ... spite of the rel-
atively low agmatinase activity of the Asn149Asp vari-
ant, it is clear that the interactions of arginase II with
l-arginine and agmatine are greatly altered by replace-
ment of ... sensitive method for
the quantitation of microgram quantities of protein util-
izing the principle of protein-dye binding. Anal Biochem
72, 248–254.
Interaction of arginase II with substrate and...
- 9
- 651
- 0
Tài liệu Báo cáo khoa học: Interaction of the small heat shock protein with molecular mass 25 kDa (hsp25) with actin doc
Ngày tải lên :
20/02/2014, 23:20
... intensity of
the band of unhydrolyzed actin was plotted against the time
of incubation.
Characterization of actin preparation quality
Fluorescence parameters were used for estimation of
nativity of ... parameter A of actin was close to
2.4. Increase of the time of heating at 43 °C leading to
decrease of parameter A up to 2.2–2.3 was accompanied by
further decrease of the initial rate of polymerization. ... aggregation of partially unfolded actin (Fig. 8A).
Only 10–20% of the total quantity of actin presented in the
sample was precipitated in the presence of the 1D, 2D or 3D
mutant of HSP25. The...
- 10
- 431
- 0
Tài liệu Báo cáo Y học: Interaction of decorin with CNBr peptides from collagens I and II Evidence for multiple binding sites and essential lysyl residues in collagen pot
Ngày tải lên :
21/02/2014, 15:20
... spectra of a recombinant decorin purified in the
absence of chaotropic agents, with the exception of the
wavelength of the minimum (215–216 instead of 218 nm)
and very different to the spectrum of ... the d and e bands of collagen fibrils. Two
chemical derivatives of collagens and of positive peptides
were prepared by N-acetylation and N-methylation of the
primary amino group of Lys/Hyl side ... analysis of the
melting transition of modified peptide trimers will be
described elsewhere.
Binding of decorin to collagenous samples
and effect of chemical modifications
Equimolecular amounts of collagen...
- 10
- 575
- 0
Báo cáo khoa học: Interaction of the general transcription factor TnrA with the PII-like protein GlnK and glutamine synthetase in Bacillus subtilis potx
Ngày tải lên :
06/03/2014, 00:21
... nitrilotriacetic acid surfaces of
both flow chambers through injection of 10 lLofa5mm
NiSO
4
solution. Then, His
6
-TnrA was injected into FC 2 in a
volume of 50 lL at a concentration of 2 nmol ⁄ mL in HBS
buffer ... (SPR) of the
GlnK–TnrA interaction
As a next step, the interaction of TnrA with GlnK was
investigated in vitro by BIAcore SPR detection. For
this analysis, a Strep-tag II-tagged variant of GlnK
(GlnK-ST) ... for nonspecific
interactions.
Figure 2A shows a response difference sensorgram
(FC2 – FC1) of interactions of GlnK with immobilized
TnrA. For this analysis, an analyte concentration of
40 nm GlnK...
- 11
- 596
- 0
Báo cáo khoa học: Comprehensive interaction of dicalcin with annexins in frog olfactory and respiratory cilia pdf
Ngày tải lên :
07/03/2014, 05:20
... for
the interaction of frog annexin A1 and annexin A2
with dicalcin. Consistently, we observed that the
35 kDa forms of annexin A1 and annexin A2 found
in the fraction of the binding proteins of dicalcin
(Fig. ... sites cleaved and the mole-
cular masses of the rest of the cleaved peptides. Arrows show the
N-termini of the 35 kDa forms of annexin A1 and annexin A2.
Role of dicalcin in frog olfactory cilia T. ... was equal to the calculated
sum of each of the activities of annexin A1, annex-
in A2 and annexin A5 (Fig. 6E, thick dotted lines).
Binding of truncated forms of annexins
to dicalcin
In the present...
- 14
- 477
- 0
Báo cáo khoa học: Cloning, expression and interaction of human T-cell receptors with the bacterial superantigen SSA ppt
Ngày tải lên :
07/03/2014, 16:20
... Consequently, the molecular
studies of the interaction of SAgs with their s pecifics ligands
will not only advance understanding of the physiological
mechanisms of these molecules, but may lead to ... Mol. Recognit. 16,
91–101.
Ó FEBS 2004 Interaction of human TCR with superantigen SSA (Eur. J. Biochem. 271) 4083
Cloning, expression and interaction of human T-cell receptors
with the bacterial ... (SAgs) are a class of disease-causing and
immunostimulatory p roteins o f b acterial or viral o rigin t hat
activate a large number of T-cells through interaction with
the Vb domain of T-cell receptors...
- 9
- 485
- 0
Báo cáo khoa học: Structural and functional analysis of the interaction of the AAA-peroxins Pex1p and Pex6p pptx
Ngày tải lên :
07/03/2014, 16:20
... parts
of the N-terminal fragment and ⁄ or the second cassette;
AB
DC
EF
Fig. 5. Effects of point mutation of the
WalkerA and B motifs of the AAA-cassettes
of Pex6p on the morphological appearance
of ... point
mutations in WalkerB of D2 in both AAA-peroxins
AB
DC
EF
Fig. 4. Effects of point mutation of the
WalkerA and B motifs of the AAA-cassettes
of Pex1p on the morphological appearance of
peroxisomes. ... binding sites and elucidated the
importance of ATP-binding and -hydrolysis of Pex1p and Pex6p for their
interaction. We show that the interaction of Pex1p and Pex6p involves
their first AAA-cassettes...
- 12
- 584
- 0
Báo cáo khoa học: Interaction of synthetic peptides corresponding to hepatitis G virus (HGV/GBV-C) E2 structural protein with phospholipid vesicles doc
Ngày tải lên :
07/03/2014, 17:20
... derived from acrylamide titra-
tion of a vesicle blank. K
sv
, which is a measure of the acces-
sibility of Trp to acrylamide, was obtained from the slope
of the plots of F
0
⁄ F vs. [quencher], where ... report on the interaction of an
N-terminal (E2(7–26)) and an internal (E2(279–298))
synthetic peptide sequence of the E2 structural pro-
tein of HGV ⁄ GBV-C with phospholipid membranes
of different ... Department of Peptide and Protein Chemistry, IIQAB-CSIC, Barcelona, Spain
2 Associated Unit CSIC, Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Spain
3 Laboratory of...
- 11
- 477
- 0
Báo cáo khoa học: Interaction of human stefin B in the prefibrillar oligomeric form with membranes Correlation with cellular toxicity doc
Ngày tải lên :
07/03/2014, 17:20
... force
microscopy [15].
In this study, we measured the interaction of stefin B
with various combinations of phospholipid monolayers
and bilayers. Interaction of stefin B in the prefibrillar
aggregated state ... channel hypothesis of AD and neurodegeneration
in general, is not incompatible with other key elements
of toxicity, as, for example, the deregulation of Ca
2+
homeostasis and generation of reactive ... financial
support we thank the Ministry of Higher Education,
Science and Technology of the Republic of Slovenia
(grant ‘proteolysis and regulation’ OB14P04SK). GA
is a recipient of a Wellcome Trust International
Research...
- 10
- 476
- 0
Báo cáo Y học: Interaction of the anterior fat body protein with the hexamerin receptor in the blowfly Calliphora vicina pot
Ngày tải lên :
08/03/2014, 22:20
... post-translational
control of p rotein bio synthesis. On e of the most detailed
investigations of fat body proteins has b een the metab-
olism of the storage protein arylphorin, which belongs t o
the class of hexamerins ... interaction
of AFP and peptides derived from the hexamerin receptor
precursor can only take place in the anterior l obe of the fat
body because of the large amounts of AFP in this tissue.
Expression of ... predicted protein
is composed of 306 amino acids, with a calculated molecular
mass of 34.3 kDa and a pI of 5.72. Similar searches with the
deduced amino-acid sequence of f ull-length Calliphora
AFP,...
- 7
- 408
- 0
Báo cáo Y học: Interaction of bovine coagulation factor X and its glutamic-acid-containing fragments with phospholipid membranes A surface plasmon resonance study pdf
Ngày tải lên :
08/03/2014, 23:20
... )
*
k
on;1
k
off;1
AB 2ị
AB ỵ B )
*
k
on;2
k
off;2
AB
2
3ị
where
dẵB=dt ẳ2k
on;1
ẵAẵBỵk
off;1
ẵABk
on;2
ẵAB[B]
ỵ 2k
off;2
ẵAB
2
4ị
dẵAB=dt ẳ 2k
on;1
ẵAẵBk
off;1
ẵAB
k
on;2
ẵAB[B] ỵ 2k
off;2
ẵAB
2
5ị
dẵAB
2
=dt ... that mutation of Ca
2+
ligating
amino acids in the N-terminal part of the first EGF-like
domain of factor X influences the amidolytic activity of the
intact protein [36]. However, direct interactions ... ẳ k
on;2
ẵABẵB2k
off;2
ẵAB
2
6ị
The rate equations for the conformational change model:
A ỵ B )
*
k
on;1
k
off;1
AB 7ị
AB )
*
k
on;2
k
off;2
AB
8ị
where
dẵB=dt ẳk
on;1
ẵAẵBỵk
off;1
ẵAB9ị
3042...
- 6
- 401
- 0
