Search

Your search keyword '"Yang, Wu-de"' showing total 13 results
Start Over Author "Yang, Wu-de" Search Limiters Full Text
13 results on '"Yang, Wu-de"'

2. Synthesis and crystal structure of 4-(3-acetyl-5-(thiophen-2-yl)-2,3-dihydro-1,3,4-oxadiazol-2-yl)-7-(diethylamino)-2H-chromen-2-one, C21H21N3O4S

Author

Yu Xiang, Chen Ya-Fang, Huang Guo-Juan, Zhang You-Fang, and Yang Wu-De

Subjects
1974542, Physics, QC1-999, Crystallography, QD901-999
Abstract

C21H21N3O4S, triclinic, P1̄ (no. 2), a = 9.4256(9) Å, b = 10.1906(9) Å, c = 11.6539(9) Å, α = 101.896(7)°, β = 104.770(8)°, γ = 93.271(8)°, V = 1052.01(16) Å3, Z = 2, Rgt(F) = 0.0469, wRref(F2) = 0.1354, T = 293(2) K.

Published
2020
Full Text
View/download PDF

3. Study on 2-arylbenzo[b]furans from Itea omeiensis and their fragmentation patterns with Q-Orbitrap mass spectrometry

Author

Feng, Yun-Qian, Zhang, Pan, Jian, Jin-Zhen, Wang, Zhi-Wei, Tian, Xiao-Long, Luo, Guo-Yong, and Yang, Wu-De

Subjects
Organic Chemistry, Plant Science, Biochemistry, Analytical Chemistry
Abstract

One new 2-arylbenzo[b]furan named iteafuranal F (1) as well as two known analogues (2–3) were isolated from the 95% EtOH extract of aerial parts of Itea omeiensis. Their chemical structures were constructed based on extensive analyses of UV, IR, 1D/2D NMR and HRMS spectra. Antioxidant assays revealed significant superoxide anion radical scavenging capacity of 1 with IC50 value of 0.66 mg/mL, which was comparable to the efficiency of positive control of luteolin. In addition, the preliminary MS fragmentation patterns in negative ion mode were established to distinguish 2-arylbenzo[b]furans with C-10 in different oxidation states: the characteristic loss of CO molecule [M-H-28]- was observed for 3-formyl-2-arylbenzo[b]furans, and the loss of CH2O fragment [M-H-30]- for 3-hydroxymethyl-2-arylbenzo[b]furans, and the loss of CO2 fragment [M-H-44]- for 2-arylbenzo[b]furan-3-carboxylic acids.

Published
2023
Full Text
View/download PDF

11. Integrating Remote Sensing and GIS for Prediction of Winter Wheat (Triticum aestivum) Protein Contents in Linfen (Shanxi), China.

Author

Feng, Mei-chen, Xiao, Lu-jie, Zhang, Mei-jun, Yang, Wu-de, and Ding, Guang-wei

Subjects
REMOTE sensing, WHEAT, PROTEIN content of food, STANDARD deviations, SPECTRORADIOMETER
Abstract

In this study, relationships between normalized difference vegetation index (NDVI) and plant (winter wheat) nitrogen content (PNC) and between PNC and grain protein content (GPC) were investigated using multi-temporal moderate-resolution imaging spectroradiometer (MODIS) data at the different stages of winter wheat in Linfen (Shanxi, P. R. China). The anticipating model for GPC of winter wheat was also established by the approach of NDVI at the different stages of winter wheat. The results showed that the spectrum models of PNC passed F test. The NDVI4.14 regression effect of PNC model of irrigated winter wheat was the best, and that in dry land was NDVI4.30. The PNC of irrigated and dry land winter wheat were significantly (P<0.01) and positively correlated to GPC. Both of protein spectral anticipating model of irrigated and dry land winter wheat passed a significance test (P<0.01). Multiple anticipating models (MAM) were established by NDVI from two periods of irrigated and dry land winter wheat and PNC to link GPC anticipating model. The coefficient of determination R2 (R) of MAM was greater than that of the other two single-factor models. The relative root mean square error (RRMSE) and relative error (RE) of MAM were lower than those of the other two single-factor models. Therefore, test effects of multiple proteins anticipating model were better than those of single-factor models. The application of multiple anticipating models for predication of protein content (PC) of irrigated and dry land winter wheat was more accurate and reliable. The regionalization analysis of GPC was performed using inverse distance weighted function of GIS, which is likely to provide the scientific basis for the reasonable winter wheat planting in Linfen city, China. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

12. Synthesis and crystal structure of 4-(3-acetyl-5-(thiophen-2-yl)-2,3-dihydro-1,3,4-oxadiazol-2-yl)-7-(diethylamino)-2H-chromen-2-one, C21H21N3O4S.

Author

Yu, Xiang, Chen, Ya-Fang, Huang, Guo-Juan, Zhang, You-Fang, and Yang, Wu-De

Abstract

Copyright of Zeitschrift für Kristallographie / New Crystal Structures is the property of De Gruyter and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results