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1. Derivatization of Ions under the Conditions of Surface Assisted Laser Desorption/Ionization

Author:
Grechnikov, A. A.; Borodkov, A. S.; Nikiforov, S. M.
Source:
Journal of analytical chemistry 2019 v.74 no.3 pp. 248-254
ISSN:
1061-9348
Subject:
atmospheric pressure,   etc   ; caffeine; derivatization; desorption; ionization; ions;     Show all 6 Subjects
Abstract:
... A method for the chemical modification (derivatization) of ions obtained by surface assisted laser desorption/ionization (SALDI) is proposed. Derivatization is based on the interaction of desorbed ions with alcohol molecules. The method is simple, does not affect the duration of analysis and ensures the improvement of the analytical characteristics of the SALDI method, when analysis is carried out ...
DOI:
10.1134/S1061934819030055

2. Sealing pipe top enhancing transportation of particulate solids inside a vertically vibrating pipe

Author:
Zhang, Fuweng; Cronin, Kevin; Lin, Yinhe; Miao, Song; Liu, Chuanping; Wang, Li
Source:
Powder technology 2019 v.343 pp. 383-391
ISSN:
0032-5910
Subject:
atmospheric pressure,   etc   ; gravity; particle size; powders; vibration;     Show all 5 Subjects
Abstract:
... Particles can move against gravity inside a vibrating tube inserted in a static granular bed. This offers a new approach for transporting bulk material. In this work, we demonstrate a method to enhance the conveying of powder by sealing the tube top. With the same vibration conditions, a comparison of particle motion in an opened tube and closed top (sealed) pipe is made. Compared to an un-sealed ...
DOI:
10.1016/j.powtec.2018.11.069

3. Triphos–Fe dinitrogen and dinitrogen–hydride complexes: relevance to catalytic N₂ reductions

Author:
Cavaillé, Anthony; Joyeux, Benjamin; Saffon-Merceron, Nathalie; Nebra, Noel; Fustier-Boutignon, Marie; Mézailles, Nicolas
Source:
Chemical communications 2018 v.54 no.84 pp. 11953-11956
ISSN:
1364-548X
Subject:
atmospheric pressure,   etc   ; iron; nitrogen; protonation;     Show all 4 Subjects
Abstract:
... The two electron reduction of iron complexes [(PᴿP₂Cʸ)Fe(Cl)₂] (R = Ph or tBu) 2a–b afforded complexes [(PᴿP₂Cʸ)Fe(N₂)₂] 4a–b. Protonation of 4a at the metal center and subsequent reduction to Fe(i)–H species lead to complex [(PᴾʰP₂Cʸ)Fe(N₂)(H)₂] 6avia a spontaneous disproportionation reaction. Complex 4a behaves as one of the most efficient monometallic Fe-catalysts reported to date for N₂-to-N(S ...
DOI:
10.1039/c8cc07466f

4. Rotational and vibrational temperatures in the spark plasma by various discharge energies and strategies

Author:
Huang, Shuai; Li, Tie; Zhang, Zhifei; Ma, Pengfei
Source:
Applied energy 2019 v.251 pp. 113358
ISSN:
0306-2619
Subject:
atmospheric pressure,   etc   ; air; combustion; electrodes; energy; temperature; time series analysis;     Show all 7 Subjects
Abstract:
... Increasing discharge energies and employing advanced discharge strategies have been deemed to be effective methods for improving the ignition processes, especially for diluted or lean combustion. However, so far knowledge on the relevant mechanism is far from adequate. In particular, the effects of the plasma produced between the spark plug electrodes on spark ignition processes need to be further ...
DOI:
10.1016/j.apenergy.2019.113358

5. Direct inlet probe – High-resolution time-of-flight mass spectrometry as fast technique for the chemical description of complex high-boiling samples

Author:
Käfer, Uwe; Gröger, Thomas; Rüger, Christopher P.; Czech, Hendryk; Saraji-Bozorgzad, Mohammad; Wilharm, Thomas; Zimmermann, Ralf
Source:
Talanta 2019 v.202 pp. 308-316
ISSN:
0039-9140
Subject:
atmospheric pressure,   etc   ; elemental composition; ionization; mass spectrometry; petroleum; physicochemical properties;     Show all 6 Subjects
Abstract:
... Comprehensive chemical investigation of non-volatile complex mixtures, without extensive sample pretreatment, remains challenging due to the high number of constituents with different chemical properties. In past years, direct high-resolution mass spectrometry established itself as powerful technique for the detailed molecular description of ultra-complex mixtures, but was mainly used with atmosph ...
DOI:
10.1016/j.talanta.2019.05.030

6. Non-target screening of (semi-)volatiles in food-grade polymers by comparison of atmospheric pressure gas chromatography quadrupole time-of-flight and electron ionization mass spectrometry

Author:
Su, Qi-Zhi; Vera, Paula; Van de Wiele, Cathy; Nerín, Cristina; Lin, Qin-Bao; Zhong, Huai-Ning
Source:
Talanta 2019 v.202 pp. 285-296
ISSN:
0039-9140
Subject:
atmospheric pressure,   etc   ; gas chromatography-mass spectrometry; ions; polypropylenes; screening; silicone;     Show all 6 Subjects
Abstract:
... Atmospheric pressure gas chromatography (APGC) coupled to quadrupole time-of-flight (QTOF) and electron ionization mass spectrometry together with commercial library search are two complementary techniques for non-target screening of volatile and semi-volatile compounds. Optimization was first conducted to achieve easier search of correspondent peaks between the two systems. Analytical strategy fo ...
DOI:
10.1016/j.talanta.2019.05.029

7. Experimental and theoretical analysis of air-inflated circular woven fabric deformation

Author:
Najafzadeh, Donya; Shaikhzadeh Najar, Saeed; Khedmati, Mohammad Reza
Source:
The journal of the Textile Institute 2019 v.110 no.8 pp. 1169-1178
ISSN:
1754-2340
Subject:
atmospheric pressure,   etc   ; deformation; energy; models; photography; woven fabrics;     Show all 6 Subjects
Abstract:
... In this study, a bulge tester is designed and constructed in order to simulate air-inflated fabric deformations. The shadow moiré method is used to analyze and reconstruct the 3-D profile of the deformed fabric. To verify the results of the shadow moiré method, front view photography is performed. Theoretical modeling of fabric deformation is carried out through uniform pressure and energy methods ...
DOI:
10.1080/00405000.2018.1551303

8. Direct bacteria analysis using laserspray ionization miniature mass spectrometry

Author:
Liu, Siyu; Zuo, Jia; Lu, Yaowen; Gao, Lijuan; Zhai, Yanbing; Xu, Wei
Source:
Analytical and bioanalytical chemistry 2019 v.411 no.18 pp. 4031-4040
ISSN:
1618-2642
Subject:
atmospheric pressure,   etc   ; bacteria; least squares; lipids; mass spectrometry; surfactants;     Show all 6 Subjects
Abstract:
... An atmospheric pressure laserspray ionization mass spectrometry (AP-LSI mini MS) has been developed and employed in the fast analysis of bacteria. Without using surfactants or any extracting methods, 21 foodborne bacteria from 12 genera were directly analyzed. Typical fingerprints of small molecules and lipids were detected and recognized in the mass spectra with high reproducibility. Furthermore, ...
DOI:
10.1007/s00216-018-1385-z

9. Boosting the Sensitivity and Selectivity of a Miniature Mass Spectrometer Using a Hybrid Ion Funnel

Author:
Zhai, Yanbing; Xu, Qian; Tang, Yang; Liu, Siyu; Li, Dayu; Xu, Wei
Source:
Analytical chemistry 2019 v.91 no.12 pp. 7911-7919
ISSN:
1520-6882
Subject:
atmospheric pressure,   etc   ; detection limit; ions; isotopes; peptides; reserpine; spectrometers;     Show all 7 Subjects
Abstract:
... Besides high portability, high analytical performances are also crucial concerns for a miniature mass spectrometer to meet the demands in in situ analysis. As a continuous effort in improving analytical performances of the miniature mass spectrometer with continuous atmospheric pressure interface, a hybrid ion funnel was developed and coupled into the system in this study. The hybrid ion funnel co ...
DOI:
10.1021/acs.analchem.9b01770

10. Partial molar volumes and isentropic compressions of sugar alcohols in aqueous solutions from 15 °C to 40 °C at atmospheric pressure

Author:
Bernal, Pedro; Brown, Shanica; Mera, Mariela; Bouchibti, Yasmine
Source:
Food chemistry 2019 v.280 pp. 164-174
ISSN:
0308-8146
Subject:
atmospheric pressure,   etc   ; aqueous solutions; erythritol; maltitol; sorbitol; sweetness; temperature; xylitol;     Show all 8 Subjects
Abstract:
... Densities and sound speeds of aqueous solutions of Erythritol, Xylitol, Sorbitol, and Maltitol were measured at 15 °C, 25 °C, 40 °C, and 45 °C using a density and sound velocity meter (DSA 5000M). The results were used to calculate the apparent and standard molar volumes and compressions, the specific volumes and compressions, as well as the hydration numbers and their temperature dependence. The ...
DOI:
10.1016/j.foodchem.2018.11.120

11. Study the kinetics and thermodynamics conditions for CO2 hydrate formation in orange juice concentration

Author:
Safari, Saleh; Varaminian, Farshad
Source:
Innovative food science & emerging technologies 2019
ISSN:
1466-8564
Subject:
atmospheric pressure,   etc   ; brix; carbon dioxide; crystals; orange juice; temperature; thermodynamics;     Show all 7 Subjects
Abstract:
... In this study, for concentration of orange juice, two laboratory systems were used; one for CO2 hydrate formation at high-pressure system, another for formation of THF hydrate at atmospheric pressure system. In the high-pressure system, the kinetic parameters of CO2 hydrate formation in orange juice were investigated in comparison with pure water, in constant temperature and volume. Also the effec ...
DOI:
10.1016/j.ifset.2019.04.008

12. Strong Wet Adhesion of Tough Transparent Nanocomposite Hydrogels for Fast Tunable Focus Lenses

Author:
Li, Feibo; Zhang, Gongzheng; Wang, Zhaoshuo; Jiang, Haoyang; Yan, Shuang; Zhang, Li; Li, Huanjun
Source:
ACS applied materials & interfaces 2019 v.11 no.16 pp. 15071-15078
ISSN:
1944-8252
Subject:
atmospheric pressure,   etc   ; adhesion; adhesives; containers; energy; hydrogels; nanocomposites; tensile strength;     Show all 8 Subjects
Abstract:
... Tough hydrogel adhesives that can bond strongly to wet surfaces have shown great potential in various applications. However, it still remains a challenge to develop the adhered hydrogels integrated with strong wet adhesion, high transparency, exceptional mechanical properties, and fast self-recovery. Herein, tough nanocomposite hydrogels demonstrating high tensile strength, high transparency, and ...
DOI:
10.1021/acsami.9b02556

13. The effect of infiltration flux on air counterflow in a 2-D confined sand chamber

Author:
Chen, Kouping; Wei, Yunbo; Wu, Jichun
Source:
Journal of hydrology 2019 v.571 pp. 619-626
ISSN:
0022-1694
Subject:
atmospheric pressure,   etc   ; air; light transmission; models; permeability; sand; wetting front;     Show all 7 Subjects
Abstract:
... Experiments were carried out to investigate the effect of infiltration flux on air counterflow in a 2-dimensional (2-D) confined sand chamber. The air saturation distribution was monitored using light transmission and the air pressure was measured by manometers. As infiltration flux increased to 1000 mL/min and 1100 mL/min, significant increase in air pressure was observed. Due to the increase of ...
DOI:
10.1016/j.jhydrol.2019.01.078

14. Direct Conversion of Benzene as a Tar Analogue to Methane Using Non-thermal Plasma

Author:
Saleem, Faisal; Zhang, Kui; Harvey, Adam
Source:
Energy & fuels 2019 v.33 no.3 pp. 2598-2601
ISSN:
1520-5029
Subject:
atmospheric pressure,   etc   ; ambient temperature; benzene; fuels; hydrogen; methane;     Show all 6 Subjects
Abstract:
... Direct conversion of benzene to methane (>90%) was achieved in a hydrogen atmosphere in a non-thermal plasma dielectric barrier discharge reactor at atmospheric pressure. The distribution of products was a function of both plasma input power and temperature. At ambient temperature, the selectivity to lower hydrocarbons increased from 20 to 56% as the power was increased from 50 to 85 W. However, a ...
DOI:
10.1021/acs.energyfuels.8b04528

15. Influence of cooling-induced edge morphology evolution during chemical vapor deposition on H₂ etching of graphene domains

Author:
Wang, Bin; Wang, Yuwei; Wang, Guiqiang; Zhang, Qingguo
Source:
RSC advances 2019 v.9 no.10 pp. 5865-5869
ISSN:
2046-2069
Subject:
atmospheric pressure,   etc   ; atomic force microscopy; copper; graphene; hydrogen; vapors;     Show all 6 Subjects
Abstract:
... In this paper, we studied the influence of edge morphology evolution during the chemical vapor deposition cooling process on H₂ etching of graphene domains. Hexagonal graphene domains were synthesized on a Cu substrate and etched with H₂ at atmospheric pressure. After etching, two kinds of graphene edge morphologies were observed, which were closely associated with the cooling process. A visible c ...
DOI:
10.1039/c8ra09265f

16. Velocity field of EHD flow during back corona discharge in electrostatic precipitator

Author:
Krupa, A.; Podliński, J.; Mizeraczyk, J.; Jaworek, A.
Source:
Powder technology 2019 v.344 pp. 475-486
ISSN:
0032-5910
Subject:
atmospheric pressure,   etc   ; electrodes; fly ash; mixing; particle image velocimetry; powders;     Show all 6 Subjects
Abstract:
... Particle Image Velocimetry studies of velocity field of the EHD flow during the back corona discharge at atmospheric pressure in an electrode system comprising a needle discharge electrode at negative potential and a grounded plate collection electrode covered with fly ash layer are presented in this paper. It was found that the magnitude of velocity vector of the EHD flow starting from the crater ...
DOI:
10.1016/j.powtec.2018.12.006

17. Li₄Na₂CsB₇O₁₄: a new edge-sharing [BO₄]⁵⁻ tetrahedra containing borate with high anisotropic thermal expansion

Author:
MutailipuThese authors contributed equally., Miriding; Zhang, Min; Li, Hao; Fan, Xiao; Yang, Zhihua; Jin, Shifeng; Wang, Gang; Pan, Shilie
Source:
Chemical communications 2019 v.55 no.9 pp. 1295-1298
ISSN:
1364-548X
Subject:
atmospheric pressure,   etc   ; anisotropy; borates; chemical reactions; thermal expansion;     Show all 5 Subjects
Abstract:
... Li₄Na₂CsB₇O₁₄ with unique edge-sharing [BO₄]⁵⁻ tetrahedra, an unprecedented [B₁₄O₂₈]¹⁴⁻ cluster, and high anisotropic thermal expansion has been obtained under atmospheric pressure conditions, indicating that high pressure is not essential for obtaining edge-sharing [BO₄]⁵⁻ tetrahedra-containing borates. In addition, Li₄Na₂CsB₇O₁₄ may be used as a thermal expansion material. ...
DOI:
10.1039/c8cc09422e

18. Simulation of eco-friendly and affordable energy production via solid oxide fuel cell integrated with biomass gasification plant using various gasification agents

Author:
Hosseinpour, Javad; Chitsaz, Ata; Liu, Lin; Gao, Yang
Source:
Renewable energy 2020 v.145 pp. 757-771
ISSN:
0960-1481
Subject:
atmospheric pressure,   etc   ; air; biomass; cost effectiveness; energy costs; exergy; fuel cells; gasification; heat; municipal solid waste; oxygen; renewable energy sources; steam;     Show all 13 Subjects
Abstract:
... There has been huge attention has been given to renewable energy resources including biomass, to meet the sustainable energy production plans. As one of the first systematic studies, biomass gasification integrated internal reforming solid oxide fuel cell (SOFC) plant is designed and fed by municipal solid waste (MSW) using four different gasification agents including air (case 1), oxygen-enriched ...
DOI:
10.1016/j.renene.2019.06.033

19. Experimental validation of a looped-tube thermoacoustic engine with a stub for tuning acoustic conditions

Author:
Kruse, Alexander; Schmiel, Tino; Tajmar, Martin
Source:
Energy conversion and management 2018 v.177 pp. 292-305
ISSN:
0196-8904
Subject:
atmospheric pressure,   etc   ; acoustics; argon (noble gases); heat;     Show all 4 Subjects
Abstract:
... Thermoacoustic engines with a looped-tube structure and multiple thermoacoustic stages are able to efficiently utilize low-grade heat. If additional measures to counteract acoustic reflections are taken, similar results can be achieved by using only one single stage. The implementation of a stub, which is a compliant duct closed on one side and T-branched to the engine’s loop on the other side, al ...
DOI:
10.1016/j.enconman.2018.09.069

20. The Emerging Role of Gas Plasma in Oncotherapy

Author:
Dai, Xiaofeng; Bazaka, Kateryna; Richard, Derek J.; Thompson, Erik (Rik) W.; Ostrikov, Kostya (Ken)
Source:
Trends in biotechnology 2018 v.36 no.11 pp. 1183-1198
ISSN:
0167-7799
Subject:
atmospheric pressure,   etc   ; clinical trials; neoplasms; patients; therapeutics;     Show all 5 Subjects
Abstract:
... Atmospheric pressure gas plasmas are emerging as a promising treatment in cancer that can supplement the existing set of treatment modalities and, when combined with other therapies, enhance their selectivity and efficacy against resistant cancers. With further optimisation in production and administration of plasma treatment, plasma-enabled therapy has a strong potential to mature as a tool for s ...
DOI:
10.1016/j.tibtech.2018.06.010