Correlation spectroscopy

Carbon quantum dots (CQDs) are a new blooming carbon containing nanoparticles having size of less than 10 nm. They have wide range of application in the field of sensing of inorganic analytes, bio sensing, cell imaging, studying biological processes in living cells and also for drug delivery. T. In this review article we demonstrate how these tools are used to characterize newly synthesized CQDs, monitor the synthesis process along with finding its application in numerous fields.

26p dianmotminh02 03-05-2024 5 2   Download

In ebook "Single-molecule fluorescence spectroscopy of the folding of a repeat protein" single-molecule fluorescence resonance energy transfer (FRET) spectroscopy was used to study the folding of a protein that belongs to the large and important family of repeat proteins. Cohen shows that the dynamics of the expanded conformations is likely to be very fast, suggesting a spring-like motion of the whole chain. The findings shed new light on the elasticity of structure in repeat proteins, which is related to their function in binding multiple and disparate partners.

70p tracanhphuonghoa1007 22-04-2024 4 3   Download

Ebook "Correlation force spectroscopy for single molecule measurements" addresses the development of a new force spectroscopy tool, correlation force spectroscopy (CFS) for the measurement of the properties of very small volumes of material (molecular to µm3) at kHz-MHz frequency range. CFS measures the simultaneous thermal fluctuations of two closely-spaced atomic force microscopy (AFM) cantilevers. CFS then calculates the cross-correlation in the thermal fluctuations that gives the mechanical properties of the matter that spans the gap of the two cantilevers.

135p tudohanhtau1006 29-03-2024 5 1   Download

Ebook "Dipolar correlation spectroscopy: Higher-order correlation terms in three-spin double electronelectron resonance (DEER)" presents experimental conditions which allow to extract the three-spin contribution precisely from experimental multi-spin double electron-electron resonance (DEER) signals. The theory and concepts behind the used techniques, which are among others broadband chirp pump pulses, over coupling of microwave resonators and echo reduction measurements, are discussed and explained in detail.

138p tudohanhtau1006 29-03-2024 11 1   Download

Ebook "New synthetic routes to polyoxometalate containing ionic liquids: An investigation of their properties" carried out fundamental investigations into the development of polyoxometalate based ionic liquids (POM-ILs). The POM-ILs were obtained by charge balancing inorganic polyoxometalate (POM) anions with sterically demanding tetraalkylammonium or tetraalkylphosphonium cations.

138p tudohanhtau1006 29-03-2024 3 1   Download

Ebook "Fluorescent proteins II: Application of fluorescent protein technology" highlights the physicochemical and biophysical aspects of fluorescent protein technology beyond imaging. It is tailored to meet the needs of physicists, chemists and biologists who are interested in the fundamental properties of fluorescent proteins, while also focussing on specific applications. The implementations described are cutting-edge studies and exemplify how the physical and chemical properties of fluorescent proteins can stimulate novel findings in life sciences.

287p manmanthanhla0201 26-02-2024 2 1   Download

Ebook "Fluorescence spectroscopy in biology: Advanced methods and their applications to membranes, proteins, dna, and cells" focuses on two new approaches in cell fluorescence microscopy. R. Brock shows how to characterize diffusion in cells by fluorescence correlation spectroscopy. The last two contributions by S. Rosenthal and O. Minet are devoted to photophysics and the use of quantum dots in cell imaging.

315p manmanthanhla0201 27-02-2024 3 2   Download

Ebook Biophysics: Part 1 includes contents: Laser correlation spectroscopy - nutritional, ecological and toxic aspects; microtools for microsurgery of a single cell in field of cellular engineering, an interfacial thermodynamics model for protein stability,... and other contents.

144p longtimenosee03 30-01-2024 5 2   Download

A low field benchtop electron spin resonance (ESR) (also referred to as electron paramagnetic resonance (EPR)) spectrometer is used to reveal paramagnetic centres such as oxygen vacancies and Ti+3 centres over 0.5%Pd/TiO2 . The measurement was performed at room temperature after the sample was reduced in situ under mild hydrogen pressures and evacuated to P < 10–6 Torr.

8p lyhuyenthu 31-01-2023 7 2   Download

We propose a novel approach relied on high-resolution solid-state 13C NMR spectroscopy to quantify the crystallinity index of chitosans (Ch) prepared with variable average degrees of acetylation (DA) from 5% to 60 % and average weight molecular weight (Mw) ranged in 0.15 × 106 g mol− 1 –1.2 × 106 g mol− 1 .

14p viginny 30-12-2022 10 2   Download

Geometry optimizations and TD-DFT calculations have been carried out on series of fused-ring-expanded phthalonitriles, phthalocyanines, and aza-dipyrromethene boron difluoride (aza-BODIPY) dyes and trends in their optical and redox properties have been analyzed. The potential utility of fused-ring-expanded phthalocyanine and aza-BODIPY analogues for photodynamic therapy and near infrared region sensor applications is assessed on this basis.

14p langthannam 29-12-2021 14 0   Download

A great wealth of structural information about phosphazenes can be gleaned from the combined spectroscopic and crystallographic data. When data from 31P NMR spectroscopy and X-ray crystallography are put together like pieces in a puzzle, a number of correlations can be obtained for phosphazene derivatives. A systematic study concerning the correlations among the structural parameters (e.g., 31P NMR data, endocyclic/exocyclic NPN bond angles and bond lengths) revealed some characteristics of mono- and di-spirocyclophosphazene derivatives bearing 4- fluoro/nitrophenylmethyl pendant arm/arms.

15p tudichquannguyet 29-11-2021 6 2   Download

The amount of fatty degeneration (FD) has major impact on the clinical result and cuff integrity after rotator cuff repair. A quantitative analysis with magnet resonance imaging (MRI) spectroscopy was employed to analyze possible correlation of FD with tendon retraction, tendon thickness and patients’ characteristics in full thickness supraspinatus tears.

6p vitennessee2711 01-02-2021 9 2   Download

Identification of individual components in complex mixtures is an important and sometimes daunting task in several research areas like metabolomics and natural product studies. NMR spectroscopy is an excellent technique for analysis of mixtures of organic compounds and gives a detailed chemical fingerprint of most individual components above the detection limit.

8p vikentucky2711 26-11-2020 12 1   Download

In this paper, the fractional-order modeling of multiple groups of lithium-ion batteries with different states is discussed referring to electrochemical impedance spectroscopy (EIS) analysis and iterative learning identification method. The structure and parameters of the presented fractional-order equivalent circuit model (FO-ECM) are determined by EIS from electrochemical test. Based on the working condition test, a P-type iterative learning algorithm is applied to optimize certain selected model parameters in FO-ECM affected by polarization effect

8p dayhoctainha 10-09-2020 15 0   Download

In this work, the Raman and IR active vibrational modes of GaN structure were calculated using correlation method. All the experimental Raman peaks were assigned in the Raman spectra of GaN/AlxGa1-xN/AlN/Si structures, which were prepared using metalorganic chemical vapor deposition (MOCVD) technique. The effect of AlxGa1-xN buffer layer with various of x values (0.011; 0.02; 0.037; 0.053; 0.49; 1) on the structure properties of GaN was studied by mean of Raman spectroscopy.

8p nguathienthan6 06-07-2020 8 1   Download

In this work, the correlation between 137Cs and 40K concentrations in tea tree and soil in Luong My farm, Tan Thanh district, Luong Son commune, Hoa Binh province was experimentally investigated. The measurements were carried out using gamma spectroscopy with a high purity germanium (HPGe) detector.

13p capheny 28-02-2020 17 1   Download

This paper reported the results of classification of geographic origin and simultaneous analysis of three methylxanthines (caffeine, theobromine, theophylline) in Vietnamese tea samples by the infrared reflectance spectrophotometry coupled with chemometrics.

7p vilisbon2711 02-01-2020 15 1   Download

An association between hepatitis C virus infection and neuropsychiatric symptoms has been proposed for some years. A variety of studies have been undertaken to assess the nature and severity of these symptoms, which range from fatigue and depression to defects in attention and verbal reasoning. There is evidence of mild neurocognitive impairment in some patients with HCV infection, which is not fully attributable to liver dysfunction or psychosocial factors.

10p kequaidan1 16-11-2019 23 1   Download

Today, most investigations of the plant metabolome tend to be based on either nuclear magnetic resonance (NMR) spectroscopy or mass spectrometry (MS), with or without hyphenation with chromatography. Although less sensitive than MS, NMR provides a powerful complementary technique for the identification and quantification of metabolites in plant extracts.

13p trinhthamhodang1 16-11-2019 15 0   Download