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1. Discontinuous Subatmospheric Pressure Interface Reduces the Gas Flow Effects on Miniature CAPI Mass Spectrometer

Author:
Huo, Xinming; Zhu, Xuanyu; Tang, Fei; Zhang, Jian; Zhang, Xiaohua; Yu, Quan; Wang, Xiaohao
Source:
Analytical chemistry 2020 v.92 no.5 pp. 3707-3715
ISSN:
1520-6882
Subject:
atmospheric pressure,   etc   ; detection limit; roxithromycin; spectrometers;     Show all 4 Subjects
Abstract:
... In the range of miniature mass spectrometers, the miniature ion trap mass spectrometer with continuous atmospheric pressure interface (CAPI) shows good performance potential and advantages due to its excellent sensitivity and analysis speed. However, in previous cases, placing the ion trap directly near the skimmer aperture means it will suffer high gas shock, which may affect performance. In this ...
DOI:
10.1021/acs.analchem.9b04824

2. Size and structural characterization of Si nanocrystal aggregates from a low pressure nonthermal plasma reactor

Author:
Chen, Xiaoshuang; Seto, Takafumi; Kortshagen, Uwe R.; Hogan, Christopher J.
Source:
Powder technology 2020 v.373 pp. 164-173
ISSN:
0032-5910
Subject:
atmospheric pressure,   etc   ; image analysis; nanocrystals; silicon; transmission electron microscopy;     Show all 5 Subjects
Abstract:
... Si nanocrystals (NCs) are synthesizable in low-pressure plasmas with narrow diameter distributions because of unipolar negative charging in the plasma. However, NCs must pass into a spatial afterglow, where NCs may decharge and aggregate. We use both low-pressure differential mobility analysis and quantitative TEM image analysis to examine Si NCs sampled from a 2 Torr Ar-SiH₄ plasma reactor. We fi ...
DOI:
10.1016/j.powtec.2020.06.026

3. Miniaturization of liquid chromatography coupled to mass spectrometry.: 2. Achievements on modern instrumentation for miniaturized liquid chromatography coupled to mass spectrometry

Author:
Vargas Medina, Deyber Arley; Maciel, Edvaldo Vasconcelos Soares; de Toffoli, Ana Lúcia; Lanças, Fernando Mauro
Source:
Trends in analytical chemistry 2020 v.128 pp. 115910
ISSN:
0165-9936
Subject:
atmospheric pressure,   etc   ; instrumentation; ionization; liquid chromatography; mass spectrometry;     Show all 5 Subjects
Abstract:
... Capillary and nano liquid chromatography coupled to mass spectrometry has recently become one of the primary analytical techniques in many science areas of maior interest, including omics, food security, environmental surveillance, biomedicine, among others. This interest relays on their economical, environmental and analytical advantages, such as low volumes of reagents and sample requirement, ga ...
DOI:
10.1016/j.trac.2020.115910

4. Investigation on the simulation approach for Martian rarefied aeolian activities based on discrete element method

Author:
Ding, Tianxiang; Deng, Zongquan; Hou, Xuyan; Liu, Yuming; Liu, Yufei; Li, Man; Li, Meng
Source:
Powder technology 2020 v.369 pp. 202-222
ISSN:
0032-5910
Subject:
atmospheric pressure,   etc   ; air flow; computer simulation; dust; dust storms;     Show all 5 Subjects
Abstract:
... Due to the tiny size of dust particles and the low atmospheric pressure, the Martian aeolian activity between Martian dust particles and Martian airflow should be considered as a rarefied two-phase flow. In this paper, a simulation approach for the rarefied characteristic of Martian dust storm has been studied based on discrete element method (DEM). First, the simulation approach based on the DSMC ...
DOI:
10.1016/j.powtec.2020.05.055

5. Functional Plasma Polymerized Surfaces for Biosensing

Author:
Makhneva, Ekaterina; Barillas, Laura; Farka, Zdeněk; Pastucha, Matěj; Skládal, Petr; Weltmann, Klaus-Dieter; Fricke, Katja
Source:
ACS applied materials & interfaces 2020 v.12 no.14 pp. 17100-17112
ISSN:
1944-8252
Subject:
atmospheric pressure,   etc   ; biochemical compounds; chemical species; immunosensors; monitoring; polymerization;     Show all 6 Subjects
Abstract:
... The capabilities of biosensors for fast, economic, and user-friendly analysis of complex samples has led to the exploitation of analytical devices for detection, quantification, and monitoring of specific chemical species for various applications. For a sufficiently high surface reactivity toward the adopted bioreceptors, a thin functional layer is required to enable coupling of the target biomole ...
DOI:
10.1021/acsami.0c01443

6. Numerical and thermodynamic study on effects of high and low pressure exhaust gas recirculation on turbocharged marine low-speed engine

Author:
Wang, Dawei; Shi, Lei; Zhu, Sipeng; Liu, Bo; Qian, Yuehua; Deng, Kangyao
Source:
Applied energy 2020 v.261 pp. 114346
ISSN:
0306-2619
Subject:
atmospheric pressure,   etc   ; compressors; energy; nitrogen oxides; temperature; thermodynamics;     Show all 6 Subjects
Abstract:
... Marine low-speed engines are one of the most favorable power devices for oceangoing vessels. However, their energy consumption reduction is currently limited because of applying the exhaust gas recirculation (EGR) to reduce the NOx emission. Consequently, high pressure (HP) and low pressure (LP) EGR are studied in this study to explore the interactive relationship among the EGR, the turbocharger a ...
DOI:
10.1016/j.apenergy.2019.114346

7. Effect of molecular structure on excess molar enthalpy of amine-based carbon dioxide absorbent and water

Author:
Zhang, Ruilei; Chen, Jian; Cao, Guirong; Gu, Hongbiao; Xiao, Ruijie; Chen, Kaiwen
Source:
Thermochimica acta 2020 v.685 pp. 178514
ISSN:
0040-6031
Subject:
atmospheric pressure,   etc   ; absorbents; absorption; calorimeters; carbon dioxide; chemical structure; enthalpy;     Show all 7 Subjects
Abstract:
... Amine-based carbon dioxide absorbent has the characteristics of high selective absorption rate and strong absorption capacity and occupies the leading position in the carbon dioxide absorption process. The absorption performance of amine carbon dioxide absorbents is directly related to their thermodynamic properties. Accordingly, for the selection of new absorbents, the important thermodynamic pro ...
DOI:
10.1016/j.tca.2020.178514

8. Stopover departure decisions in songbirds: do long-distance migrants depart earlier and more independently of weather conditions than medium-distance migrants?

Author:
Packmor, Florian; Klinner, Thomas; Woodworth, Bradley K.; Eikenaar, Cas; Schmaljohann, Heiko
Source:
Movement ecology 2020 v.8 no.1 pp. 6
ISSN:
2051-3933
Subject:
atmospheric pressure,   etc   ; Oenanthe oenanthe; Turdus merula; air temperature; autumn; cloud cover; fuel loading; migratory behavior; songbirds;     Show all 9 Subjects
Abstract:
... BACKGROUND: Songbirds following distinct migration strategies (e.g. long- vs. short- to medium-distance migrants) often differ in their speed of migration during autumn and, thus, are assumed to face different time constraints. During migration, most songbird species alternate migratory flights with stopover periods. Many of them restrict these migratory flights to the night, i.e., they are noctur ...
DOI:
10.1186/s40462-020-0193-1
PubMed:
32047634
PubMed Central:
PMC7006082

9. Improving precision in regional scale numerical simulations of groundwater flow into underground openings

Author:
Park, Y.-J.; Hwang, H.-T.; Suzuki, S.; Saegusa, H.; Nojiri, K.; Tanaka, T.; Bruines, P.; Abumi, K.; Morita, Y.; Illman, W.A.
Source:
Engineering geology 2020 v.274 pp. 105727
ISSN:
0013-7952
Subject:
atmospheric pressure,   etc   ; aquifers; dewatering; geometry; groundwater flow; mathematical models; nuclear fuels; permeability; safety assessment;     Show all 9 Subjects
Abstract:
... Dewatering is a common engineering practice to secure the accessibility during the construction and operational phases of tunnels. It is thus important to accurately estimate the amount of groundwater flow into underground openings for the design and safe operation of tunnels. Numerical models need to be used to estimate groundwater flow into openings for given heterogeneity and regional hydrologi ...
DOI:
10.1016/j.enggeo.2020.105727

10. Compression-enhanced thermal conductivity of carbon loaded polymer composites

Author:
Ohayon-Lavi, Avia; Buzaglo, Matat; Ligati, Shani; Peretz-Damari, Sivan; Shachar, Gal; Pinsk, Noam; Riskin, Michael; Schatzberg, Yotam; Genish, Isaschar; Regev, Oren
Source:
Carbon 2020 v.163 pp. 333-340
ISSN:
0008-6223
Subject:
atmospheric pressure,   etc   ; boron nitride; electrical conductivity; electronic equipment; epoxides; graphene; heat; nanocomposites; nanoparticles; polymers; thermal conductivity;     Show all 11 Subjects
Abstract:
... The miniaturization, integration and compatibilization of electronic devices dictate the need for efficient thermal management to prevent heat accumulation, which may reduce the operation speed and shorten their life time. Addressing this challenge requires the development of novel polymer-based composite materials with enhanced thermal conductivity. Here, we report a compression-based (25–250 bar ...
DOI:
10.1016/j.carbon.2020.03.026

11. Using of improved models of Gaussian Processes in order to Regional wind power forecasting

Author:
Xue, Hao; Jia, Yuchen; Wen, Peng; Farkoush, Saeid Gholami
Source:
Journal of cleaner production 2020 v.262 pp. 121391
ISSN:
0959-6526
Subject:
atmospheric pressure,   etc   ; covariance; energy; ingredients; models; normal distribution; prediction; wind farms; wind power; wind speed;     Show all 10 Subjects
Abstract:
... The fluctuation of the wind speed and direction is due to the stochastic nature of the wind and the enforcing atmospheric pressure. Accordingly, the output power forecasting of the wind farms (WFs) will be difficult. In this paper, a novel method based on Gaussian Processes (GPs) is proposed to improve the probabilistic prediction of the WF levels and regional WFs. The Covariance Functions (CFs) a ...
DOI:
10.1016/j.jclepro.2020.121391

12. Application of ZnO Nanorods Based Whispering Gallery Mode Resonator in Optical Immunosensors

Author:
Tereshchenko, Alla; Yazdi, G. Reza; Konup, Igor; Smyntyna, Valentyn; Khranovskyy, Volodymyr; Yakimova, Rositsa; Ramanavicius, Arunas
Source:
Colloids and surfaces 2020 v.191 pp. 110999
ISSN:
0927-7765
Subject:
atmospheric pressure,   etc   ; Vitis; antibodies; immunosensors; nanorods; optical properties; photoluminescence; proteins; silicon; vapors; viruses; zinc oxide;     Show all 12 Subjects
Abstract:
... In this research a whispering gallery mode (WGM) resonator based on vertically oriented ZnO nanorods, which were formed on silicon surface (silicon/ZnO-NRs), has been applied in the design of optical immunosensor that was dedicated for the determination of grapevine virus A-type (GVA) proteins. Vertically oriented ZnO-NRs were grown on silicon substrates by atmospheric pressure metal organic chemi ...
DOI:
10.1016/j.colsurfb.2020.110999

13. Determination and correlation for solubilities of urea and cyanuric acid in organic solvents from 300.75 K to 369.45 K

Author:
Yao, Yanhui; Wen, Yazhou; Yang, Chunyu; Zhang, Jing; Ren, Qinghui; Shi, Xiaohua
Source:
Thermochimica acta 2020 v.689 pp. 178613
ISSN:
0040-6031
Subject:
atmospheric pressure,   etc   ; endothermy; equations; liquids; models; pyrolysis; solubility; solvents; temperature; thermodynamics; urea;     Show all 11 Subjects
Abstract:
... In order to choose the suitable solvent for the synthesis of cyanuric acid from urea through the liquid phase pyrolysis method, the solubilities of urea and cyanuric acid in eight kinds of pure solvents, N,N-dimethyl formamide, cyclohexanol, N,N-dimethyl acetamide, 1,2-propanediol, N-methylpyrrolidone, 2-methyl-1,3-propanediol, formamide and tetramethylene sulfone, were determined in the temperatu ...
DOI:
10.1016/j.tca.2020.178613

14. Concept and performance of a novel wave energy converter: Variable Aperture Point-Absorber (VAPA)

Author:
Zheng, Siming; Zhang, Yongliang; Iglesias, Gregorio
Source:
Renewable energy 2020 v.153 pp. 681-700
ISSN:
0960-1481
Subject:
atmospheric pressure,   etc   ; energy conversion; hydrodynamics; models; oceans; power take-offs; water power; water waves;     Show all 8 Subjects
Abstract:
... Ocean waves are a huge and largely untapped resource of green energy. In order to extract energy from waves, a novel wave energy converter (WEC) consisting of a floating, hollow cylinder capped by a roof with a variable aperture is presented in this paper. The power take-off (PTO) system is composed of a linear generator attached to the seabed, driven by the heave motion of the floating cylinder t ...
DOI:
10.1016/j.renene.2020.01.134

15. Numerical analysis of the influence of air compressibility effects on an oscillating water column wave energy converter chamber

Author:
Gonçalves, Rafael A.A.C.; Teixeira, Paulo R.F.; Didier, Eric; Torres, Fernando R.
Source:
Renewable energy 2020 v.153 pp. 1183-1193
ISSN:
0960-1481
Subject:
atmospheric pressure,   etc   ; air flow; compressibility; energy conversion; equations; mathematical models; overland flow; turbines; water power;     Show all 9 Subjects
Abstract:
... The most studied device used for extracting wave energy is the Oscillating Water Column (OWC). In general, numerical simulations of these cases by means of models based on Reynolds Averaged Navier-Stokes equations adopt the Volume of Fluid method to deal with the free surface flow which is considered incompressible in both water and air. The aim of this study is to investigate the influence of the ...
DOI:
10.1016/j.renene.2020.02.080

16. Fluid-Guided CVD Growth for Large-Scale Monolayer Two-Dimensional Materials

Author:
Zhou, Dong; Lang, Ji; Yoo, Nicholas; Unocic, Raymond R.; Wu, Qianhong; Li, Bo
Source:
ACS applied materials & interfaces 2020 v.12 no.23 pp. 26342-26349
ISSN:
1944-8252
Subject:
atmospheric pressure,   etc   ; fluid mechanics; mixing; models; reaction mechanisms; selenides; shear stress; vapors;     Show all 8 Subjects
Abstract:
... Atmospheric pressure chemical vapor deposition (APCVD) has been used extensively for synthesizing two-dimensional (2D) materials because of its low cost and promise for high-quality monolayer crystal synthesis. However, the understanding of the reaction mechanism and the key parameters affecting the APCVD processes is still in its embryonic stage. Hence, the scalability of the APCVD method in achi ...
DOI:
10.1021/acsami.0c04125

17. Application of atmospheric pressure plasma technology for textile surface modification

Author:
Peran, Jelena; Ercegović Ražić, Sanja
Source:
Textile research journal 2020 v.90 no.9-10 pp. 1174-1197
ISSN:
1746-7748
Subject:
atmospheric pressure,   etc   ; cleaning; fabrics; microstructure; polymerization; synthetic fibers; textile fibers; textile industry;     Show all 8 Subjects
Abstract:
... This paper gives an overview of atmospheric pressure plasma types used in the textile industry and recent developments in plasma treatments of textiles. It investigates the topic of the influence of atmospheric pressure plasma treatment on the surface properties of materials made from natural and synthetic fibers. Through plasma induced physical and chemical reactions occurring in the textile surf ...
DOI:
10.1177/0040517519883954

18. Dynamic analysis of wave action on an OWC wave energy converter under the influence of viscosity

Author:
Wang, Rong-quan; Ning, De-zhi
Source:
Renewable energy 2020 v.150 pp. 578-588
ISSN:
0960-1481
Subject:
atmospheric pressure,   etc   ; air; energy conversion; equations; mathematical models; viscosity; water power;     Show all 7 Subjects
Abstract:
... Oscillating water column (OWC) device is one of the most promising wave energy converters (WECs). Besides the energy conversion efficiency, the survivability should also be considered for a design purpose in the process of wave energy exploitation. In the present study, by introducing the artificial viscous terms into the dynamic free surface boundary condition and Bernoulli equation, a fully nonl ...
DOI:
10.1016/j.renene.2020.01.007

19. Effect of chemical and thermal modification, and material replacement on strand board properties

Author:
Pipíška, Tomáš; Pařil, Petr; Čermák, Petr; Dömény, Jakub; Král, Pavel; Kamke, Frederick
Source:
European journal of wood and wood products 2020 v.78 no.3 pp. 565-575
ISSN:
0018-3768
Subject:
atmospheric pressure,   etc   ; Picea abies; acetic anhydride; acetylation; bending strength; cork; equilibrium moisture content; steam; water uptake;     Show all 9 Subjects
Abstract:
... The purpose of this paper was to analyze the effects of various OSB-strand modifications on physical and mechanical properties of strand board. Norway spruce (Picea abies L. Karst) strands were acetylated using acetic anhydride or thermally modified at 180 °C using atmospheric pressure and superheated steam environment. Strand boards made of acetylated strands (Acet), thermally modified strands (T ...
DOI:
10.1007/s00107-020-01527-8

20. Assessment of molecular diversity of lignin products by various ionization techniques and high-resolution mass spectrometry

Author:
Qi, Yulin; Fu, Pingqing; Li, Siliang; Ma, Chao; Liu, Congqiang; Volmer, Dietrich A.
Source:
The Science of the total environment 2020 v.713 pp. 136573
ISSN:
0048-9697
Subject:
atmospheric pressure,   etc   ; biomarkers; biomass; chromatography; electrospray ionization mass spectrometry; ionization; lignin;     Show all 7 Subjects
Abstract:
... Lignin is a highly complex, plant-derived natural biomass component, the analysis of which requires significant demands on the analytical platform. Fourier transform ion cyclotron mass spectrometry (FT-ICR MS) has been shown to be able to readily assess the complexity of lignin and lignin degradation products by assigning tens of thousands of compounds with elemental formulae. Nevertheless, many e ...
DOI:
10.1016/j.scitotenv.2020.136573