uv vis absorption spectroscopy and fourier transform infrared ftir spectroscopy

... Ultraviolet-visible (UV- vis) absorption spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy The energy of a molecule consists partly of translational, rotational, vibrational and electronic ... separately confirmed by in-situ Fourier transform infrared spectroscopy (FTIR) which shows loss of the doping-induced infrared modes (Figure 2.7), and also by UV- Vis- NIR spectroscopy which shows the ... π−π∗ transitions of PEDT:PSSH can be done using UV- vis absorption spectroscopy while FTIR spectroscopy allows for the observation of the polaron bands in the subgap region The analysis of the doping...

Ngày tải lên: 14/09/2015, 14:06

... This paper describes the first examination of DNA photolyase by Fourier transform infrared (FT-IR) spectroscopy Specific infrared bands observed in difference FT-IR spectra are assigned to various ... difference bands at 1741, 1460 and 1392 cm)1 and negative bands at 1715, 1410, 1364 and 1274 cm)1 DNA photorepair The subsequent experiments addressed the enzymemediated repair of UV- damaged DNA ... has been predominantly the domain of absorption and fluorescence spectroscopy in the visible and ultraviolet ranges These methods combine high sensitivity and selectivity with excellent time resolution...

Ngày tải lên: 16/03/2014, 18:20

... cartilage by Fourier transform infrared imaging spectroscopy Osteo Cart 2005, 13:1050-1058 Pettibois C, Gouspillou G, Wehbe K, Delage J, Deleris G: Analysis of type I and IV collagens by FT-IR spectroscopy ... http://www.josr-online.com/content/3/1/48 Figure The visible images from the FTIR imager, tendon (a) and cartilage (b) The visible images from the FTIR imager, tendon (a) and cartilage (b) (a.s – articular surface) always ... Surgery and Research 2008, 3:48 http://www.josr-online.com/content/3/1/48 Figure Absorption anisotropy of amide I (a) and amide II (b) of tendon in the regular, parallel and cross sections Absorption...

Ngày tải lên: 20/06/2014, 01:20

... [12,13] Fourier transform infrared spectroscopy (FTIR) is a relatively simple, rapid and nondestructive technique that is adaptable for solids, liquids, and gases with a minimal sample preparation and ... 2000, 19:20 14 Andrus PG, Strickland RD: Cancer grading by Fourier transform infrared spectroscopy Biospectroscopy 1998, 4:37-46 15 Wood BR, Quinn MQ, Tait B, Romeo M, Mantsch HH: A FTIR spectroscopic ... length and inter/intra chain bondings can be measured easily using infrared spectroscopy Recently, the application of infrared spectroscopy in biomedical sciences has increased a lot and various...

Ngày tải lên: 20/06/2014, 07:20

... or broadband light irradiation for generation of the reactive species such as O or Cl atoms Fourier- Transform Infrared (FTIR) absorption spectroscopy is then used for the detection and monitoring ... s-1 and kOCSe = (2.4± 0.3) × 10-11 cm3 molecule-1 s-1 at 301-303K using Fourier- Transformed Infrared (FTIR) absorption spectroscopy The measurements have been accomplished by calibrating against ... Infrared (FTIR) Absorption Spectroscopy The reaction of Cl(2P3/2) and CF3CH2OH has the most products; HCl, CF3CClO, CF3CHO, HClCO, CCl2O and CO We have also tentatively assigned some new IR bands...

Ngày tải lên: 15/09/2015, 17:11

... 7.1 Twiddle factors for DFT, N ˆ case 306 FAST FOURIER TRANSFORM AND ITS APPLICATIONS The inverse discrete Fourier transform (IDFT) is used to transform the X(k) back into the original sequence ... Many DFT properties are similar to those of the Fourier transform and the z -transform However, there are some differences For example, the shifts and convolutions pertaining to the DFT are circular ... FAST FOURIER TRANSFORM AND ITS APPLICATIONS Periodicity Because of the periodicity property shown in Figure 7.1, the DFT and IDFT produce periodic results with period N Therefore the frequency and...

Ngày tải lên: 28/10/2013, 05:15

... theoretical Nernst curve and the measured data match well (fit by eye) RESULTS AND DISCUSSION UV/ VIS difference spectra Figure 1A shows the oxidized-minus-reduced UV/ VIS difference spectra of ... oxidized and the negative signals with the reduced form of the enzyme For the reduced form, the Soret band can be observed at 415 and 442 nm, and for the oxidized form at 403 and 422 nm The b–band ... amino acid residue absorption bands Biopolymers 30, 1243–1257 Hienerwadel, R., Boussac, A., Breton, J., Diner, B & Berthomieu, C (1997) Fourier transform infrared difference spectroscopy of photosystem...

Ngày tải lên: 21/02/2014, 15:20

... IPL3 ị in which IP and IPLn are the intensities of a free protein and different proteinligand complexes summed over the charge states and the isotopic distributions The free ligand concentration ... HR, Ward DG & Trayer IP (2002) Calcium and peptide binding to folded and unfolded conformations of cardiac troponin C Electrospray ionization and Fourier transform ion cyclotron resonance mass ... TRX II and CTX using high-eld ESI FT-ICR MS and X-ray crystallography Results and Discussion ESI FT-ICR analyses Figure presents typical 9.4 T ESI FT-ICR mass spectra of TRX I, TRX II and CTX...

Ngày tải lên: 07/03/2014, 17:20

... number and position, as well as an estimation of the bandwidth and the intensity of the bands making up the amide I or I¢ region Thereafter, curve fitting was performed and the heights, widths and ... SKS & Chapman D (1994) Fourier transform infrared spectroscopy and differential scanning calorimetry of transferrins: human serum transferrin, rabbit serum transferrin and human lactoferrin Biochim ... Structure and thermal denaturation of crystalline and noncrystalline cytochrome oxidase as studied by infrared spectroscopy Biochemistry 33, 11650–11655 Krimm S & Bandekar J (1986) Vibrational spectroscopy...

Ngày tải lên: 16/03/2014, 13:20

... Method and the Fourier Transform Technique z0 z* L z1 иии zL 01 zL 01 z *01 иии L * z2 z* ͬ * z L 01 иии * z1 zL z* ͬ (3.4) (3.5) (3.6) here c1 and cL /1 represent, respectively, the first and (L ... 88.2 113.4 178.2 23.4 THE FOURIER TRANSFORM ESTIMATOR For the best estimate, and f2 f1 Å 0.070 Hz, the lower limit is between and dB, as is shown in Fig 13 Figures 14 and 15 have been extracted ... , and the variable vm in ( 4.2.1 ) will be chosen as unknown parameters Note that Am is given by ( 4.2.2 ) and, therefore, each Am corresponds to two parameters, É AmÉ and um On the other hand,...

Ngày tải lên: 26/03/2014, 00:29

... nanoparticles are the most interesting because their UV vis absorption spectrum is dominated by a very intense and narrow absorption band in the near UV and visible region It is well known that the optical ... on-line by UV vis spectra Noble metal nanoparticles display localized surface plasmon resonance bands (LSPR) in the UV vis region when the incident light resonates with the conduction band electrons ... sharp and intense SPR band at kmax = 398 nm The observed absorption peak at around 398 nm is generally attributed to the surface plasmon resonance absorption of silver nanoparticles UV vis extinction...

Ngày tải lên: 21/06/2014, 17:20

... distribution, the Radon-Wigner transform, and the Fractional Fourier transform Fractional Fourier transform, as a new time-frequency analysis tool, is attracting more and more attention in signal processing ... order Fourier transform and its application to quantum mechanics,” IMA Journal of Applied Mathematics, vol 25, no 3, pp 241–265, 1980 [15] L B Almeida, “The fractional fourier transform and timefrequency ... Chen, and G Bi, “Adaptive harmonic fractional Fourier transform, ” in Proceedings of IEEE International Symposium on Circuits and Systems, vol 5, pp 45–48, Geneva, Switzerland, May 2000 L Weruaga and...

Ngày tải lên: 21/06/2014, 20:20

... interacts with Ti4+ For ex- Figure UV- vis spectra of I, II, and III imbedded in MCM-41 and Ti-MCM-41 (a) I, (b) II, and (c) III Solid line is that for Car imbedded in MCM-41 and dashed line is that for ... photoirradiation at 77 K and recorded at 77 K (a) UV- vis spectrum of Car•+, baseline corrected (b) UV- vis spectrum of Car2+, baseline corrected decrease in the distance between the Car chain and Ti4+ favors ... Ti-MCM-41 Peaks A, B, and C are due to the CH3 proton couplings16 at C (5 and 5′), C (9 and 9′) and C (13 and 13′) CH3 protons, respectively In contrast, an ENDOR spectrum of I and III in Ti-MCM-41...

Ngày tải lên: 29/07/2015, 02:43

... and Head-Gordon [83] introduced the multipole to Taylor transform operator to yield simpler and more efficient transforms In [13], the mathematical theory was summarised and extended by Epton and ... Navier equation, Stokes equation and nonlinear Poisson-type equation The FFTM method uses multipole moments and local expansions, together with the fast Fourier transform (FFT), to accelerate the ... the three methods, standard volume integration (Standard), multipole accelerated volume integration (Multipole) and particular solution method from FFT (Particular), to handle the nonhomogeneous...

Ngày tải lên: 11/09/2015, 16:06

... Fast Fourier Transform (FFT) algorithms [49] We refer to it as the Fast Fourier Transform on Multipoles (FFTM) method Hence, the objective of the second part of the thesis is to develop and implement ... corners and edges, and standard boundary elements with shape functions of low order polynomials fail to produce accurate results at these singular locations This thesis describes the formulation and ... Accurate and Efficient Three-Dimensional Electrostatics Analysis using Singular Boundary Elements and Fast Fourier Transform on Multipoles (FFTM) ONG ENG TEO...

Ngày tải lên: 15/09/2015, 21:09

... 12,2650 12,3011 12,2530 12,3229 ] UV_ VIS_ 1 WVL:263 nm mAU -0.10 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.1 Hình 12: Sắc ký đồ mẫu trắng BERBERIN CH 35.0 mAU UV_ VIS_ 1 WVL:263 nm - 7.353 -5.0 0.0 ... (%) HPLC Đo quang UV- VIS 86,09 0,0645 0,254 86,24 0,1050 0,324 Dùng chuẩn F (Fisher): Ftn = S12/S22 (S1>S2) Ftn = 0,1050/0,0645 = 1,3 S1: độ lệch chuẩn phơng pháp đo quang UV- VIS S2: độ lệch chuẩn ... chiều cao pic dễ dàng xác việc xác định diện tích pic 1.4.Tổng quan PHƯƠNG PHáP QUANG PHổ HấP THụ UV- VIS 1.4.1 Cơ sở lý thuyết[2],[3],[4],[6] 1.4.1.1 Định luật Lambert-Beer Chiếu chùm tia sáng đơn...

Ngày tải lên: 07/09/2012, 14:57

... that are continious and aperiodic Fourier Series signals that are continious and periodic Discrete Time Fourier Transform signals that are discrete and aperiodic Discrete Fourier Transform signals ... term: transform, is extensively used in Digital Signal Processing, such as: Fourier transform, Laplace transform, Z transform, Hilbert transform, Discrete Cosine transform, etc Just what is a transform? ... the Discrete Time Fourier Transform in a computer algorithm By elimination, the only Chapter 8- The Discrete Fourier Transform Type of Transform 145 Example Signal Fourier Transform signals that...

Ngày tải lên: 13/09/2012, 09:49

... domain results in the signal being expanded in the other domain, and vice versa Figures (c) and (d) show a discrete signal and its spectrum, respectively In (a) and (b), the time domain signal has ... wave, an upper sideband, and a lower sideband These correspond to the three parts of the original audio signal: the DC component, the positive frequencies between 0.3 and kHz, and the negative 206 ... Transform The Discrete Time Fourier Transform (DTFT) is the member of the Fourier transform family that operates on aperiodic, discrete signals The best way to understand the DTFT is how it relates...

Ngày tải lên: 13/09/2012, 09:49

... spectrum Is there a waveform that is its own Fourier Transform? The answer is yes, and there is only one: the Gaussian Figure (e) shows a Gaussian curve, and (f) shows the corresponding frequency ... method (Table 8-2), except that the outer and inner loops are exchanged The Sinc Function Figure 11-4 illustrates a common transform pair: the rectangular pulse and the sinc function (pronounced “sink”) ... or model continuous signals, and continuous signals don't alias To remove the aliasing in Eqs 11-1 and 11-2, change the denominators from sin (B k / N ) to B k / N and from sin (B f ) to B f,...

Ngày tải lên: 13/09/2012, 09:49

... samples and N/2 , as previously described 2000 'INVERSE FAST FOURIER TRANSFORM SUBROUTINE 2010 'Upon entry, N% contains the number of points in the IDFT, REX[ ] and 2020 'IMX[ ] contain the real and ... contains the number of points in the DFT, and 5020 'XR[ ] and XI[ ] contain the real and imaginary parts of the time domain 5030 'Upon return, REX[ ] and IMX[ ] contain the frequency domain data ... input and output signals run from X(1) through J=J-K X(N), rather than the customary X(0) through K=K/2 X(N-1) GO TO 40 J=J+K RETURN END Chapter 12- The Fast Fourier Transform 1000 'THE FAST FOURIER...

Ngày tải lên: 13/09/2012, 09:50