Structure elucidation

The clinical value and impact in patients with EGFR mutation on survival outcomes is further needed to be elucidated to decide whether the application of EGFR-TKIs was appropriate in early lung adenocarcinoma (LUAD) stage appearing as subsolid nodules.

9p vishanshan 27-06-2024 3 1   Download

To elucidate these issues, a detailed study of the microstructure of amorphous V2O5 under pressure was needed. The spatial distributions of atoms, the link distributions and the geometrical distributions of the free volumes need to be fully investigated. The distribution of free volume in the amorphous V2O5 network also needs to be visualized. These are the main contents in this paper.

11p viambani 18-06-2024 2 1   Download

This book, based on many lectures and seminars, attempts to provide advanced undergraduates and graduate students with a systematic, readable and inexpensive introduction to the methods of structure determination by NMR. It starts with a deliberately concise 'survey of the basic terms, parameters and techniques dealt with in detail in other books, which this workbook is not intended to replace.

138p vimeyers 29-05-2024 5 1   Download

To elucidate the composition of bioactive substances from this plant, the aerial part of the plant was selected for study. This paper reported the isolation, structural identification of eleven phenolic compounds and their NO production inhibition activity.

8p dianmotminh02 03-05-2024 3 1   Download

A new megastigmane glycoside, (3S,5R,6R,9S)-6,9-epoxiionane-3,5-diol 3-O-βprimeveroside together with 7 compounds were isolated from Achyranthes aspera L. The chemical structures were elucidated through 1D-, 2DNMR, and HR-ESI-MS experiment. The absolute configuration of 1 was determined using combination of the experimental and theoretical calculation of CD spectra. Compounds 2 and 7 were reported for the first time from the genus Achyranthes.

5p dianmotminh02 03-05-2024 2 1   Download

wo germacranolide sesquiterpenes, 9β-acetoxy-3-epi-nobilium, zoapatanolide B and four benzoate ester derivatives, benzyl 2-O-β-D-glucopyranosyl-6-methoxybenzoate, benzyl 2-O-β-D-glucopyranosyl-6- hydroxybenzoate, methyl 2-O-β-D-glucopyranosylbenzoate, ficuside G were isolated from aerial part of Sigesbeckia orientalis. Structural elucidation of the isolated compounds was done using a combination of HR-ESI-MS, one-dimensional and two-dimensional NMR spectral methods, and comparison their spectral data with the previous literature.

7p dianmotminh02 03-05-2024 4 2   Download

This study serves as a comprehensive review, delving deeply into pivotal theoretical frameworks associated with the development of the corporate credit rating market. By emphasizing cornerstone principles such as information symmetry, risk management, and corporate governance, it elucidates the central role of credit ratings in providing instrumental insights for investment decisions and optimizing capital structures.

12p longtimenosee09 08-04-2024 2 1   Download

Ebook "A first example of a lyotropic smectic C* analog phase: Design, properties and chirality effects" reports the discovery of the lyotropic counterpart of the thermotropic SmC* phase, which has become famous as the only spontaneously polarized, ferroelectric fluid in nature.

130p tudohanhtau1006 29-03-2024 2 1   Download

Ebook "Computer-based structure elucidation from spectral data: The art of solving problems" is composed of three parts. Part I contains a concise description of the ACD/Structure Elucidator flow diagram, its knowledgebase, and the fundamental concepts making up the theoretical basis of CASE (Chap. 1). Different strategies regarding the application of the system depending on the specific features of the problem being solved are discussed in Chap. 2.

458p tudohanhtau1006 29-03-2024 3 1   Download

The family Magnoliaceae has over 300 species and 17 genus. Some of the genus with well-known include Magnolia, Liriodendron, Alcimandra, Lirianthe, Manglietia, Michelia, Pachylarnax, Parakmeria, Talauma, and Yulania. The Magnolia has about 220 species of woody plants with simple blooms.

6p viellison 28-03-2024 4 1   Download

Ebook "Development of novel anti-HIV pyrimidobenzothiazine derivatives" is in three parts. The first part expounds efficient methods for the synthesis of tricyclic heterocycles related to PD 404182 based on the sp2-carbon−heteroatom bond formations. The second part explains SAR studies of PD 404182 for the development of anti-HIV agents. The third part of the thesis elucidates the development of photoaffinity probes for the target identification of PD 404182.

157p coduathanh1122 27-03-2024 2 1   Download

Ebook "Structural and functional characterization of the immunoproteasome" reveals ground-breaking results by elucidating the crystal structure of the murine immunoproteasome in complex with a selective inhibitor. Huber does this by performing multidisciplinary methodologies including X-ray crystallography, fluorescence spectroscopy and mutagenesis experiments. Her exceptional results explore the immunoproteasome complex structures and are of outstanding importance for future scientific research especially in the pharmaceutical industry.

96p coduathanh1122 27-03-2024 1 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 "Structural interfaces and attachments in biology" describes the attachment of dissimilar materials from multiple perspectives. The text will simultaneously elucidate natural bimaterial attachments and outline engineering principles underlying successful attachments to the communities of tissue engineers and surgeons.

385p cotieubac1004 15-03-2024 2 0   Download

Ebook "Computer-based modeling of novel carbon systems and their properties: Beyond nanotubes (Carbon materials: Chemistry and physics, Volume 03)" provides the reader with a survey of state-of-the-art theoretical and computational contributions featuring novel carbon systems (excluding nanotubes). The chapters are authored by leading researchers who are all actively involved with different aspects of carbon structure and property elucidation. Consequently, a variety of methods are presented to the reader.

255p manmanthanhla0201 26-02-2024 6 1   Download

In this article, the author elucidates the structural, semantic, and pragmatic characteristics of certain distinctive address words utilized by the Ê-đê people in their communication. Through an analysis of dialogues present in the epic Đăm Săn, the study of these unique address words reveals their functional capabilities and habitual usage, thereby presenting key insights into the characteristics of Ê-đê ethnic culture, which is notably characterized by its typical matrilineal family-based societal structure.

16p vibego 02-02-2024 4 1   Download

Phytochemical studies on the methanolic extract of Barleria prionitis Linn. collected in Luang Namtha province, Laos have led to the isolation and structural elucidation of four secondary metabolites, including two iridoid glycosides: shanzhiside methyl ester (1), barlerin (2); one sterol: stigmasterol (3); and a sterol glycoside: β-sitosterol glycoside (4). Their structures were identified by spectroscopic analyses such as 1D and 2D NMR spectra.

7p visharma 20-10-2023 5 1   Download

Vigna radiata (L.) Wilczek, commonly known as mung bean, is a legume cultivated for its edible seeds and sprouts across Asia. In this study, we report the isolation and structural elucidation of four flavonoids and one steroid from the ethyl acetate extract of V. radiata pods.

7p viengels 25-08-2023 4 2   Download

Ligustrum sinense L. is a common shadetolerant evergreen shrub with an expansive non-native global range found invading riparian forests throughout the southeastern United States. This research reported the isolation and structure elucidation of five secoiridoid glucosides from the methanol extract of the leaves of L. sinense species.

9p viengels 25-08-2023 4 2   Download

TiO2/CuSe nanocomposites were synthesized using a straightforward wet chemical without any sophisticated template. A variety of characterization techniques, including XRD, Raman spectra, UV-Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), and SEM/EDS analysis were used to elucidate the structure, morphology, and optical properties of the TiO2/CuSe nanocomposite.

11p viberbers 09-08-2023 3 3   Download