Mass spectroscopy

Ebook "Studies of photoinduced molecular dynamics using a fast imaging sensor" presented in this thesis involves a number of sophisticated experiments highlighting novel applications of the Pixel Imaging Mass Spectrometry (PImMS) camera in the field of photoinduced molecular dynamics. This approach represents the union of a new enabling technology (a multiple memory register, CMOS-based pixel detector) with several modern chemical physics approaches and represents a significant leap forward in capabilities.

194p tracanhphuonghoa1007 22-04-2024 4 3   Download

Part 1 book "Chemistry" by author Catherine E. Housecroft includes content: Some basic concepts, thermochemistry; atoms and atomic structure; homonuclear covalent bonds, heteronuclear diatomic molecules, polyatomic molecules - shapes, polyatomic molecules - bonding, ions, elements, mass spectrometry, introduction to spectroscopy, vibrational and rotational spectroscopies; electronic spectroscopy, NMR spectroscopy, reaction kinetics.

571p muasambanhan10 06-04-2024 6 0   Download

In ebook "Applications of MALDI-TOF spectroscopy" some topics involve the principles and the applications of ISD. Typically, MALDI is coupled with time-of-flight (TOF) analyzers with rather high resolution and a good cost performance, therefore MALDI-TOF-MS has become a nice combination in MS analysis.

220p coduathanh1122 27-03-2024 2 1   Download

Ebook "Laser photodissociation and spectroscopy of mass-separated biomolecular ions (Lecture notes in Chemistry, Volume 83)" is to introduce students and researchers to exciting developments in laser-based photodissociation of trapped biomolecular ions inside mass spectrometers. The convergence of mass spectrometry (MS) and lasers in fact draws from a rich history in mass spectroscopy in the realm of physical chemistry and chemical physics.

128p coduathanh1122 27-03-2024 3 1   Download

Ebook "Challenges in molecular structure determination" provide a practice-oriented and systematic introduction to both organic and inorganic structure determination by spectroscopic methods. This includes mass spectrometry, vibrational spectroscopies, UV/VIS spectroscopy and NMR as well as applying combinations of these methods. The authors show how to elucidate chemical structures with a minimal number of spectroscopic techniques. Readers can train their skills by more than 400 problems with varying degree of sophistication.

500p coduathanh1122 27-03-2024 7 1   Download

Ebook "Gold(I,III) complexes designed for selective targeting and inhibition of Zinc finger proteins" explores gold(I)-phosphine, gold(III) complexes with N^N and C^N donors as inhibitors of the HIV-1 nucleocapsid protein (NCp7), in comparison to the human transcription factor Sp1. To determine the coordination sphere of the gold adducts formed by interaction with ZnFs, two innovative approaches are used, based on Travelling-Wave Ion Mobility coupled with Mass Spectrometry (TWIM-MS), and X-ray Absorption Spectroscopy.

184p lamquandat 28-12-2023 3 2   Download

Trong báo cáo này, phương pháp phân tích Sắc ký khí ghép nối khối phổ (Gas Chromatography coupled Mass Spectroscopy - GC/MS) được sử dụng nhằm phân tích thành phần dạng khí sinh ra từ quá trình đốt cháy vải sợi cotton chưa qua xử lý, cũng như vải sợi cotton chống cháy xử lý bằng hệ phụ gia Pyrovatex CP, để từ đó thu được cái nhìn rõ nét hơn về tính an toàn của loại vật liệu này trong điều kiện sử dụng thực tế.

7p vimichaelfaraday 28-12-2023 6 4   Download

Part 2 book "Analytical methods for food safety by mass spectrometry (Vol I - Pesticides)" includes content: Basic research on chromatography mass spectroscopy characteristic parameters of pesticide and chemical pollutants.

590p oursky04 14-09-2023 3 3   Download

Part 1 of ebook "Metabolomics tools for natural product discovery: Methods and protocols" presents the following content: bryophytes - liverworts, mosses, and hornworts - extraction and isolation procedures; plant tissue extraction for metabolomics; detection of polar metabolites through the use of gas chromatography–mass spectrometry; metabolite analysis of biological fluids and tissues by proton nuclear magnetic resonance spectroscopy;...

155p dieptieuung 14-07-2023 4 1   Download

Three compounds were isolated from the butanol extract of Impatiens claviger’s leaves and twigs collected in Me Linh, Ha Noi. Their structures were elucidated by the mass, NMR spectroscopy and comparison with published data as two phenolic glucosides and one triterpene glycoside. One of them has been found for the first time in Impatiens genus.

4p vifalcon 18-05-2023 2 2   Download

The hydro-distilled essential oil from the fresh aerial part of Orchidantha vietnamica K. Larsen collected from Lamdong-Vietnam was analyzed by GC-FID (Gas ChromatographyFlame Ionization Detection) and GC-MS (Gas Chromatography-Mass Spectroscopy) for the first time.

6p vidudley 20-02-2023 2 2   Download

YNU-5 zeolite has the YFI-type framework with a 12-12-8-ring system (2-dimensional 12-oxygen membered ring pores 3-dimensionally connected by twin 8-ring channels), and isolated 8-ring channels separated from the system by a thin (mono-atomic silicate) wall. In this study, the acidic property of YNU-5 zeolite was analyzed mainly by means of the ammonia IRMS-TPD (infrared/mass spectroscopy temperature-programmed desorption) method.

12p vironald 15-12-2022 2 2   Download

In this study, we developed and validated a simple, fast and sensitive LC-MS/MS method for the measurement of tetrodotoxin (TTX) in human plasma. Three HILIC-type solid phase extraction (SPE) carriers (PSA, silica, Siphila i HILIX) with different stationary phase functional groups were compared.

9p vironald 15-12-2022 13 2   Download

The purpose of the study was the comprehensive comparative phytochemical characterization of fifteen different accessions of jojoba oil using Spectrophotometer, Atomic Absorption Spectroscopy (AAS) and Gas Chromatography – Mass Spectrometry (GC–MS).

9p schindler 30-12-2021 13 0   Download

An efficient 2-component synthesis of a series of 3-(2-(substituted phenylamino)thiazol-4-yl)-2H -chromen-2- ones (3a–j) was achieved by the reaction of 3-(2-thiocyanatoacetyl)-2H -chromen-2-one (1) with a variety of suitably substituted anilines in 1:1 molar ratio in ethanol. The structures of the products were established by elemental analyses, and UV-vis, FTIR, 1H and 13C NMR, and mass spectroscopy. 3-(2-(4-Methylphenylamino)thiazol-4-yl)-2 H -chromen-2- one (3j) was further characterized by single crystal X-ray diffraction study.

11p langthannam 29-12-2021 10 0   Download

The copper(II) complex of N -[ethyl(butyl)carbamothioyl]-3,5-dinitrobenzamide (1) has been synthesized and characterized by elemental analysis, IR spectroscopy, and atmospheric pressure chemical ionization-mass spectrometry. Thermogravimetric analysis shows that complex 2 decomposes in 2 steps to form copper sulfide. The complex was used as a single-source precursor for the deposition of copper sulfide thin film by aerosol-assisted chemical vapor deposition at 350◦C.

9p langthannam 29-12-2021 8 0   Download

Direct coupling between ferrocenelithium and 3(2),8(7)-dibromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in a debromination reaction accompanied by very minor dimerization of the tetraazaporphyrin core, which was explained based on the steric properties of the parent tetraazaporphyrin. The target compounds were characterized using APCI mass spectrometry, UV-vis, and MCD spectroscopy, while the electronic structure of ferrocenylethyl-containing products was predicted by DFT approach.

19p langthannam 29-12-2021 11 0   Download

Metal-free phthalocyanine 3 and its metallophthalocyanine derivatives 4, 5, and 6 (M = Zn, Co, and Ni) substituted with four 21-membered pentathiadiaza macrocycles were synthesized and their structures identified by elemental analysis, IR, 1 H NMR, mass, and UV-Vis spectroscopy techniques. The aggregation properties of phthalocyanines 4, 5, and 6 were investigated in different solvents and at different concentrations of dimethylformamide.

10p langthannam 29-12-2021 5 0   Download

The synthesis of tetraaminopropylamid substituted phthalocyanines was targeted to prepare enhanced soluble phthalocyanines in common solvents from hydrophobic to hydrophilic that bore nonionic groups on their periphery. Metal-free (H2Pc) and metallophthalocyanines (Zn(II) (ZnPc), Cu(II) (CuPc) and Co(II) (CoPc)) were prepared and characterized by UV-Vis, FT-IR, and mass spectroscopies. The 1 H NMR spectra were recorded for the diamagnetic phthalocyanine species H2Pc and ZnPc.

13p langthannam 29-12-2021 7 0   Download

In this study, new cobalt phthalocyanine containing a 2-(2-benzothiazolylthio)ethoxy group at peripheral positions has been synthesized and characterized by spectroscopic methods (IR, UV-Vis elemental analysis, and mass spectroscopies). Catalytic activity of Co(II) phthalocyanine has been investigated in the presence of oxidants such as tert-buthylhydroperoxide, m-chloroperoxybenzoic acid, and H2 O2 . Co(II) phthalocyanine shows catalytically activity and product conversion under mild conditions.

8p langthannam 29-12-2021 11 0   Download