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1. Tuning the morphology and chemical composition of MoS2 nanostructures

Author:
Radovsky, Gal; Shalev, Tom; Ismach, Ariel
Source:
Journal of materials science 2019 v.54 no.10 pp. 7768-7779
ISSN:
0022-2461
Subject:
chemical composition,   etc   ; fullerene; molybdenum disulfide; temperature; vapors;     Show all 5 Subjects
Abstract:
... Chemical vapor deposition has proven to be one of the most promising approaches to achieve large-scale and high-quality ultra-thin layered materials in general, and single- and few-layer transition metal dichalcogenides in particular. Therefore, the study of the conditions affecting the growth and the obtained structure (morphology and chemical composition) is of crucial importance in order to imp ...
DOI:
10.1007/s10853-019-03437-4

2. Chemical constituents from Scutellaria hainanensis C. Y. Wu

Author:
Bai, Meng; Zheng, Cai-Juan; Wu, Shou-Yuan; Chen, Guang-Ying; Song, Xiao-Ping; Han, Chang-Ri
Source:
Biochemical systematics and ecology 2019 v.82 pp. 1-12
ISSN:
0305-1978
Subject:
chemical composition,   etc   ; Scutellaria; chemotaxonomy; flavonoids; glycosides; phenylpropanoids;     Show all 6 Subjects
Abstract:
... Seventeen compounds were obtained from the extract of the whole plant of Scutellaria hainanensis C. Y. Wu. Including eleven flavonoids (1–4 and 7–13), two phenylpropanoids (16 and 17), one pyridinium derivative (5), one ester (6), one phenolic derivative (14), and one lignanoid (15). Compound 5 was a synthetic intermediate, newly identified as a natural product. The chemotaxonomic relationship bet ...
DOI:
10.1016/j.bse.2018.10.007

3. Effect of the Chemical Nature on the Stripping Potential of Binder–Aggregate Interfaces

Author:
Baldi, Alejandra; Aguiar-Moya, Jose P.; Loría-Salazar, Luis L.
Source:
Energy & fuels 2019 v.33 no.4 pp. 2625-2632
ISSN:
1520-5029
Subject:
chemical composition,   etc   ; adhesion; energy; fuels; pavements;     Show all 5 Subjects
Abstract:
... Chemical, physical, and mechanical aspects determine the interaction between an adhesive and a substrate. In the case of pavement materials, where the binder acts as an adhesive and the aggregate acts as a substrate, a good interaction will depend to a large degree upon their chemical composition. For such a reason, the importance of the molecular interactions that take place on the surface of mat ...
DOI:
10.1021/acs.energyfuels.8b03413

4. Phenylpropanoids from Callus Tissue of Ajuga turkestanica

Author:
Eshbakova, K. A.; Zakirova, R. P.; Khasanova, Kh. I.; Bobakulov, Kh. M.; Aisa, H. A.; Sagdullaev, Sh. Sh.; Nosov, A. M.
Source:
Chemistry of natural compounds 2019 v.55 no.1 pp. 28-31
ISSN:
0009-3130
Subject:
chemical composition,   etc   ; Ajuga turkestanica; callus; phenylpropanoids;     Show all 4 Subjects
Abstract:
... Phenylpropanoids 3,4-dihydroxy-β-phenylethoxy-O-α-L-arabinopyranosyl-(1→2)-α-L-rhamnopyranosyl-(1→3)-4-O-caffeoyl-β-D-glucopyranoside (1) and 3,4-dihydroxy-β-phenylethoxy-O-α-L-arabinopyranosyl-(1→2)-α-L-rhamnopyranosyl-(1→3)-4-O-feruloyl-β-D-glucopyronoside (2) were isolated for the first time during studies of the chemical composition of Ajuga turkestanica (Regel) Briq. callus tissue. ...
DOI:
10.1007/s10600-019-02608-8

5. Effect of air masses motion on the rapid change of aerosols in marine atmosphere

Author:
Yan, Jinpei; Lin, Qi; Zhang, Miming; Zhao, Shuhui; Chen, Liqi
Source:
Journal of environmental sciences (China) 2019 v.83 pp. 217-228
ISSN:
1001-0742
Subject:
chemical composition,   etc   ; aerosols; air; particle size; shipping; spectrometers; China;     Show all 7 Subjects
Abstract:
... The impact of air masses motion on marine aerosol properties was investigated using an on-board single particle mass spectrometer (SPAMS) deployed for the determination of single particle size resolved chemical composition over Southeast China Sea. Two aerosol blooms (E1 and E2) were observed during the cruise. High average particle number count occurred in E1 (7320), followed by E2 (5850), which ...
DOI:
10.1016/j.jes.2019.04.005

6. Influence of varnishing on the vibro-mechanical properties of wood used for violins

Author:
Lämmlein, Sarah L.; Mannes, David; van Damme, Bart; Burgert, Ingo; Schwarze, Francis W. M.
Source:
Journal of materials science 2019 v.54 no.11 pp. 8063-8095
ISSN:
0022-2461
Subject:
chemical composition,   etc   ; relative humidity; sorption; vibrational properties; wood;     Show all 5 Subjects
Abstract:
... Violins are varnished to protect them against wear, from changes in relative humidity and to enhance the instrument’s appearance. Furthermore, studies have shown that the application of varnish alters the mechanical and vibrational properties of the wood, respectively, the instrument. Commonly, the varnish impact has been studied by means of changes in stiffness, mass and damping properties of woo ...
DOI:
10.1007/s10853-019-03440-9

7. Chemical constituents from the aerial parts of Impatiens hypophylla Makino var. hypophylla

Author:
Tsushiro, Kazuki; Kurizaki, Ayumi; Watanabe, Takashi; Devkota, Hari Prasad
Source:
Biochemical systematics and ecology 2019 v.83 pp. 10-12
ISSN:
0305-1978
Subject:
chemical composition,   etc   ; Impatiens; aerial parts; apigenin; coumarin; luteolin; scopoletin; spectroscopy;     Show all 8 Subjects
Abstract:
... Seven flavonoids such as luteolin (1), luteolin 7-O-β-glucopyranoside (2), luteolin 3'-O-β-glucopyranoside (3), chryseriol (4), apigenin (5), apigenin 7-O-β-glucopyranoside (6) and astragalin (7) and one coumarin, scopoletin (8) were isolated from the aerial parts of Impatiens hypophylla Makino var. hypophylla (Family: Balsaminaceae). Structures of these compounds were elucidated on the basis of s ...
DOI:
10.1016/j.bse.2018.12.011

8. Constitutive properties and plastic instabilities in the heat-affected zones of advanced high-strength steel spot welds

Author:
Rezayat, H.; Ghassemi-Armaki, H.; Bhat, S. P.; Sriram, S.; Babu, S. S.
Source:
Journal of materials science 2019 v.54 no.7 pp. 5825-5843
ISSN:
0022-2461
Subject:
chemical composition,   etc   ; digital images; microstructure; steel; temperature; tempering; tensile strength;     Show all 7 Subjects
Abstract:
... Recent publications have shown that the load-bearing capability of advanced high-strength steel (AHSS) spot welds do not scale linearly with the tensile strength of the base metal. Although this unexpected degradation of welds has been linked to the tempering of the martensite phase in the heat-affected zone (HAZ), the detailed elastic–plastic stress–strain behavior in different regions of the HAZ ...
DOI:
10.1007/s10853-018-03276-9

9. Local Li-ion conductivity changes within Al stabilized Li₇La₃Zr₂O₁₂ and their relationship to three-dimensional variations of the bulk composition

Author:
Smetaczek, Stefan; Wachter-Welzl, Andreas; Wagner, Reinhard; Rettenwander, Daniel; Amthauer, Georg; Andrejs, Lukas; Taibl, Stefanie; Limbeck, Andreas; Fleig, Jürgen
Source:
Journal of materials chemistry A 2019 v.7 no.12 pp. 6818-6831
ISSN:
2050-7496
Subject:
chemical composition,   etc   ; aluminum; cations; chemical analysis; electrochemistry; oxygen; spectroscopy; stoichiometry;     Show all 8 Subjects
Abstract:
... The attractiveness of cubic Li₇La₃Zr₂O₁₂ (LLZO) based garnets lies in their high ionic conductivity and the combination of thermal and electrochemical stability. However, relationships between the exact chemical composition and ionic conductivity are still not well understood and samples of very similar composition and processing may show very different properties. In this contribution, we investi ...
DOI:
10.1039/c9ta00356h

10. Oxygen vacancies enhance lithium storage performance in ultralong vanadium pentoxide nanobelt cathodes

Author:
Yu, Yanlong; Li, Jinpeng; Wang, Xiaoliang; Chang, Bingdong; Wang, Jun; Ahmad, Mashkoor; Sun, Hongyu
Source:
Journal of colloid and interface science 2019 v.539 pp. 118-125
ISSN:
0021-9797
Subject:
chemical composition,   etc   ; annealing; cathodes; lithium; microstructure; oxidation; oxygen; temperature; vanadium;     Show all 9 Subjects
Abstract:
... Ultralong V2O5 nanobelts have been successfully synthesized by a facile hydrothermal oxidation route. Oxygen vacancies are generated in the V2O5 nanobelts by annealing under N2 atmosphere at an elevated temperature. The microstructure and chemical composition of the pristine and annealed V2O5 nanobelts are studied by different methods. Compared to the pristine V2O5 nanobelts, the annealed V2O5 nan ...
DOI:
10.1016/j.jcis.2018.12.046

11. Equiaxial nano-crystals Nb3Al superconductor prepared by optimized mechanically alloying

Author:
Zhang, Wenjie; Li, Pingyuan; Zou, Xiaofeng; Yu, Zhou; Yang, Xinsheng; Pan, Xifeng; Zhao, Yong; Zhang, Yong
Source:
Journal of materials science 2019 v.54 no.6 pp. 5022-5031
ISSN:
0022-2461
Subject:
chemical composition,   etc   ; magnetic fields; microstructure; milling; nanocrystals; superconductivity; temperature;     Show all 7 Subjects
Abstract:
... The influence of the original nominal chemical composition, milling time, sintering temperature and holding time was studied systematically on the phase formation, microstructure and superconductivity of mechanically alloyed Nb₃Al. By optimizing the process, we have successfully prepared high-performance Nb₃Al superconductor. Samples with original nominal composition of Nb-27 at.%Al were milled fo ...
DOI:
10.1007/s10853-018-2918-8

12. Effects of grinding aids on model parameters of a cement ball mill and an air classifier

Author:
Toprak, Nurettin Alper; Benzer, Ahmet Hakan
Source:
Powder technology 2019 v.344 pp. 706-718
ISSN:
0032-5910
Subject:
chemical composition,   etc   ; air; cement; equations; grinding; mixing; models; polyols; powders;     Show all 9 Subjects
Abstract:
... This research focuses on investigating the effects of the three different grinding aids, consisting of a mixture of amine, glycol and polyol in different ratios, on the model parameters of a two-compartment cement ball mill and an air classifier. Within the content of this work, sampling campaigns were organized around a cement grinding circuit and each of the three grinding aids at varying dosage ...
DOI:
10.1016/j.powtec.2018.12.039

13. Designing Solid Materials from Their Solute State: A Shift in Paradigms toward a Holistic Approach in Functional Materials Chemistry

Author:
Gebauer, Denis; Wolf, Stephan E.
Source:
Journal of the American Chemical Society 2019 v.141 no.11 pp. 4490-4504
ISSN:
1520-5126
Subject:
chemical composition,   etc   ; alloys; crystallization; ions; mineralization; polymers; separation; solutes; synthesis;     Show all 9 Subjects
Abstract:
... “Non-classical” notions consider formation pathways of crystalline materials where larger species than monomeric chemical constituents, i.e., ions or single molecules, play crucial roles, which are not covered by the classical theories dating back to the 1870s and 1920s. Providing an outline of “non-classical” nucleation, we demonstrate that prenucleation clusters (PNCs) can lie on alternative pat ...
DOI:
10.1021/jacs.8b13231

14. Mechanisms of temper embrittlement and recovery in cast HY-80 high-strength low-alloy steel

Author:
Draper, M.; Ankem, S.
Source:
Journal of materials science 2019 v.54 no.3 pp. 2601-2611
ISSN:
0022-2461
Subject:
chemical composition,   etc   ; carbides; carbon; heat treatment; phosphorus; steel; temperature;     Show all 7 Subjects
Abstract:
... To better understand the mechanisms and rate of temper embrittlement in cast HY-80 high-strength low-alloy steel, samples were subjected to embrittlement and recovery treatments after a typical industrial heat treatment. The embrittlement rate was studied between 315 and 565 °C at varied logarithmic time intervals up to 10000 min. The embrittlement recovery rate was studied between 593 and 704 °C ...
DOI:
10.1007/s10853-018-2973-1

15. Highlighting IR Spectrochemical Imaging of the Retina

Author:
Aboualizadeh, Ebrahim; Hirschmugl, Carol J.
Source:
Trends in biochemical sciences 2018 v.43 no.9 pp. 650-653
ISSN:
0968-0004
Subject:
chemical composition,   etc   ; image analysis; retina;     Show all 3 Subjects
Abstract:
... An emerging application of mid-IR spectrochemical imaging of the retina is its utility in studying the highly localized biomolecular alterations in the chemistry of retinal cell layers associated with several pathological conditions. Spatially resolved IR images highlight simultaneous chemical composition of the entire span of the retina in a label-free manner. ...
DOI:
10.1016/j.tibs.2018.04.005

16. Large-area perovskite solar cells – a review of recent progress and issues

Author:
Chen, Yichuan; Zhang, Linrui; Zhang, Yongzhe; Gao, Hongli; Yan, Hui
Source:
RSC advances 2018 v.8 no.19 pp. 10489-10508
ISSN:
2046-2069
Subject:
chemical composition,   etc   ; coatings; solar cells;     Show all 3 Subjects
Abstract:
... In recent years, perovskite solar cells (PSCs) have attracted great attention in the photovoltaic research field, because of their high-efficiency (certified 22.1%) and low-cost. In this review paper, we briefly introduce the history of efficiency development for PSCs, and discuss some of the major problems for large-area (≥1 cm²) PSC devices. In addition, we summarize the recent progress in the a ...
DOI:
10.1039/c8ra00384j

17. Modeling advanced combustion modes in compression ignition engines with tabulated kinetics

Author:
Lucchini, T.; Della Torre, A.; D’Errico, G.; Onorati, A.
Source:
Applied energy 2019 v.247 pp. 537-548
ISSN:
0306-2619
Subject:
chemical composition,   etc   ; emissions; energy conservation; energy use and consumption; fuel combustion; fuels; models; pollutants;     Show all 8 Subjects
Abstract:
... New combustion modes for compression ignition engines are currently under investigation to achieve a further reduction noxious emissions and fuel consumption. Among them, partially premixed (PPC or PCCI) and dual fuel combustion (including RCCI) seem to be the most promising technologies. To support the design of new combustion systems, rapid and accurate models are required to correctly describe ...
DOI:
10.1016/j.apenergy.2019.04.062

18. Fermentation-based biotransformation of glucosinolates, phenolics and sugars in retorted broccoli puree by lactic acid bacteria

Author:
Ye, Jian-Hui; Huang, Long-Yue; Terefe, Netsanet Shiferaw; Augustin, Mary Ann
Source:
Food chemistry 2019 v.286 pp. 616-623
ISSN:
0308-8146
Subject:
chemical composition,   etc   ; autoclaving; biotransformation; broccoli; fermentation; functional foods; glucoiberin; glucoraphanin; lactic acid bacteria; polyphenols; progoitrin; sugars;     Show all 12 Subjects
Abstract:
... This study investigated the effect of lactic acid bacteria (LAB) fermentation on the chemical profile of autoclaved broccoli puree, using 7 broccoli-derived LAB isolates (named F1-F5, BF1 and BF2). The total concentrations of glucosinolates (glucoiberin, progoitrin and glucoraphanin) and 10 major phenolics significantly increased from trace level and 289 μg total phenolics/g dry weight (DW) respec ...
DOI:
10.1016/j.foodchem.2019.02.030

19. Catalytic co-pyrolysis of sugarcane bagasse and waste high-density polyethylene over faujasite-type zeolite

Author:
Hassan, H.; Lim, J.K.; Hameed, B.H.
Source:
Bioresource technology 2019 v.284 pp. 406-414
ISSN:
0960-8524
Subject:
chemical composition,   etc   ; arc furnaces; biofuels; liquids; oils; polyethylene; pyrolysis; slags; sugarcane bagasse; temperature; wastes; zeolites;     Show all 12 Subjects
Abstract:
... This study investigated the catalytic co-pyrolysis of sugarcane bagasse (SCB) and waste high-density polyethylene (HDPE) over faujasite-type zeolite derived from electric arc furnace slag (FAU-EAFS) in a fixed-bed reactor. The effects of reaction temperature, catalyst-to-feedstock ratio, and HDPE-to-SCB ratio on product fractional yields and chemical compositions were discussed. The co-pyrolysis o ...
DOI:
10.1016/j.biortech.2019.03.137

20. Comparison of triterpene compounds of four botanical parts from Poria cocos (Schw.) wolf using simultaneous qualitative and quantitative method and metabolomics approach

Author:
Zhang, Guanhua; Wang, Hongxia; Xie, Wenyu; Wang, Qi; Wang, Xu; Wang, Chunying; Du, Yingfeng; Huo, Changhong; Wang, Qiao
Source:
Food research international 2019 v.121 pp. 666-677
ISSN:
0963-9969
Subject:
chemical composition,   etc   ; Oriental traditional medicine; Wolfiporia cocos; dietary supplements; metabolomics; principal component analysis; quantitative analysis; triterpenoids;     Show all 8 Subjects
Abstract:
... Poria cocos (Schw.) Wolf (PCW) is a widely used traditional Chinese medicine and dietary supplement. Its four parts including Poriae Cutis (PC), Rubra Poria (RP), White Poria (WP) and Poria cum Radix Pini (PRP) have different pharmacological effects and clinical applications. It is necessary to establish analytical platforms for differentiating the chemical composition of four botanical parts for ...
DOI:
10.1016/j.foodres.2018.12.036