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1. Size-controllable synthesis of ultrasmall diamonds from halogenated adamantanes at high static pressure

Author:
Ekimov, E.A.; Lyapin, S.G.; Grigoriev, Yu.V.; Zibrov, I.P.; Kondrina, K.M.
Source:
Carbon 2019 v.150 pp. 436-438
ISSN:
0008-6223
Subject:
static pressure,   etc   ; diamonds; nanodiamonds; temperature;     Show all 4 Subjects
Abstract:
... We report on the use of dibromoadamantane C10H14Br2 as a promising precursor for the mass synthesis of ultrasmall diamonds at an industrially accessible pressure of 8 GPa. Under pressure, the formation of nanodiamonds upon decomposition of C10H14Br2 starts at the record low temperature of 1000 К. As a result of the decomposition, effective nucleation of diamonds and their slow growth at temperatur ...
DOI:
10.1016/j.carbon.2019.05.047

2. Meta-community selection favours reciprocal cooperation but depresses exploitation between competitors

Author:
Yan, Chuan; Zhang, Zhibin
Source:
Ecological complexity 2019 v.37 pp. 55-62
ISSN:
1476-945X
Subject:
selection pressure,   etc   ; mutualism; population density;     Show all 3 Subjects
Abstract:
... The evolution of cooperation and mutualism has mainly been explored through individual- and group-level processes. However, community-level processes could also impose selection pressure on species interactions. By using a dome-shaped nonmonotonic interaction (DS interaction) with cooperation at low-density and competition at high-density, we studied how cooperation and exploitation are selected a ...
DOI:
10.1016/j.ecocom.2018.11.001

3. Pressure drop in liquid chromatography

Author:
Podgornik, Aleš
Source:
Journal of separation science 2019 v.42 no.1 pp. 72-88
ISSN:
1615-9306
Subject:
pressure,   etc   ; compressibility; liquid chromatography; separation;     Show all 4 Subjects
Abstract:
... Measurement of pressure drop is routinely performed during chromatographic runs. In many cases this information is only used for regulation of mobile phase flow rate to keep pressure drop below defined limit. However, pressure drop can provide additional important information about performance of chromatographic process. In this review different parameters affecting pressure drop such as compressi ...
DOI:
10.1002/jssc.201800882

4. Voltammetric study of one-step electrochemical methane production during water and CO2 co-electrolysis in molten CsH2PO4

Author:
Nikiforov, A.V.; Petrushina, I.M.; Christensen, E.; Berg, R.W.; Bjerrum, N.J.
Source:
Renewable energy 2020 v.145 pp. 508-513
ISSN:
0960-1481
Subject:
partial pressure,   etc   ; carbon dioxide; electrochemistry; electrodes; hydrogen; methane production; nickel; renewable energy sources;     Show all 8 Subjects
Abstract:
... Cyclic voltammetry was performed with a nickel electrode in molten CsH2PO4 at 350 °C and at approximately 25 bar of water pressure. The effect of adding carbon dioxide was examined. It is found that even small amounts of CO2 (partial pressure below 0.2 bar at 350 °C, corresponding to 0.5 bar at 22 °C of a 5:1 mixture of N2:CO2) have a pronounced effect on the cyclic voltammetry curves. Under these ...
DOI:
10.1016/j.renene.2019.06.075

5. The case for reporting PO2 (partial pressure of oxygen), in addition to DO (dissolved oxygen), in studies of aquatic systems

Author:
Ultsch, Gordon R.; Nordlie, Frank G.
Source:
Comparative biochemistry and physiology 2019 v.235 pp. 66-68
ISSN:
1095-6433
Subject:
oxygen partial pressure,   etc   ; dissolved oxygen; oxygen;     Show all 3 Subjects
Abstract:
... In this essay, we question the sole use of mg/L (ppm) and the term DO (dissolved oxygen) when referring to oxygen supply in water, and discuss reasons for also reporting the partial pressure of oxygen (PO2). Oxygen moves from water into organisms by diffusion only, and the rate and direction of diffusion is solely dependent upon partial pressure gradients, not concentration gradients. However, the ...
DOI:
10.1016/j.cbpa.2019.05.007

6. Porosity Modulation in Two-Dimensional Covalent Organic Frameworks Leads to Enhanced Iodine Adsorption Performance

Author:
An, Shuhao; Zhu, Xiang; He, Yanyan; Yang, Lan; Wang, Hai; Jin, Shangbin; Hu, Jun; Liu, Honglai
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.24 pp. 10495-10502
ISSN:
1520-5045
Subject:
ambient pressure,   etc   ; adsorbents; adsorption; iodine; porosity; topology;     Show all 6 Subjects
Abstract:
... Covalent organic frameworks (COFs) with atomically precise integration of scaffolds into 2D/3D topologies have shown great promise for separation applications. In this work, a porosity modulation approach was developed for the construction of 2D COFs for efficient volatile iodine adsorption. By rationally turning building blocks, significantly different iodine separation performance was obtained o ...
DOI:
10.1021/acs.iecr.9b00028

7. Shear driven formation of nano-diamonds at sub-gigapascals and 300 K

Author:
Gao, Yang; Ma, Yanzhang; An, Qi; Levitas, Valery; Zhang, Yanyan; Feng, Biao; Chaudhuri, Jharna; Goddard, William A.
Source:
Carbon 2019 v.146 pp. 364-368
ISSN:
0008-6223
Subject:
hydrostatic pressure,   etc   ; diamonds; graphene; nanocrystals; shear stress;     Show all 5 Subjects
Abstract:
... The transformation pathways of carbon at high pressures are of broad interest for synthesis of novel materials and for revealing the Earth's geological history. We have applied large plastic shear on graphite in a rotational anvil cell to form hexagonal diamond and nanocrystalline cubic diamond at extremely low pressures of 0.4 and 0.7 GPa, which are 50 and 100 times lower than the transformation ...
DOI:
10.1016/j.carbon.2019.02.012

8. Vapor pressure of methylammonium halides. Part II: Vapor pressure and standard entropy of methylammonium bromide

Author:
Ivanov, I.L.; Mazurin, M.O.; Tsvetkov, D.S.; Malyshkin, D.A.; Sereda, V.V.; Zuev, A.Yu.
Source:
Thermochimica acta 2019 v.674 pp. 58-62
ISSN:
0040-6031
Subject:
vapor pressure,   etc   ; enthalpy; entropy; halides; sublimation; temperature;     Show all 6 Subjects
Abstract:
... The equilibrium vapor pressure of methylammonium bromide was measured as a function of temperature in the range of 433–503 K. Standard enthalpy and entropy of sublimation of CH3NH3Br at 298.15 K and 1 atm were determined as (196.7 ± 2.8) kJ·mol−1 and (280.0 ± 5.6) J·mol−1 K−1, respectively. The measured value of sublimation enthalpy was found to be in agreement with that directly calculated from t ...
DOI:
10.1016/j.tca.2019.02.008

9. Evidence, Determination, and Implications of Membrane-Independent Limiting Flux in Forward Osmosis Systems

Author:
Morrow, Christopher P.; Childress, Amy E.
Source:
Environmental science & technology 2019 v.53 no.8 pp. 4380-4388
ISSN:
1520-5851
Subject:
osmotic pressure,   etc   ; fouling; hydrodynamics; osmosis; permeability; solutes;     Show all 6 Subjects
Abstract:
... A stepwise method for determining limiting flux and limiting osmotic pressure and a constant osmotic pressure method to validate the limiting flux were developed. First, five of the most commonly used FO membranes were characterized for water permeability (A), solute permeability (B), and structural parameter (S). During both stepwise and constant osmotic pressure fouling experiments, membrane fou ...
DOI:
10.1021/acs.est.8b05925

10. Superconductivity of boron-doped graphane under high pressure

Author:
Cheng, Ya; Wang, Xianlong; Zhang, Jie; Yang, Kaishuai; Niu, Caoping; Zeng, Zhi
Source:
RSC advances 2019 v.9 no.14 pp. 7680-7686
ISSN:
2046-2069
Subject:
ambient pressure,   etc   ; crystals; phase transition; superconductivity; temperature;     Show all 5 Subjects
Abstract:
... Based on first-principles calculations, the properties of B-doped graphane under high pressure up to 380 GPa are investigated. We find that B-doped graphane undergoes a phase transition from phase-α to phase-β at 6 GPa. Different from pristine graphane (X. Wen, L. Hand, V. Labet, T. Yang, R. Hoffmann, N. W. Ashcroft, A. R. Oganov and A. O. Lyakhov, Graphane sheets and crystals under pressure, Proc ...
DOI:
10.1039/c8ra10241d

11. Effects of flow rate and rotational speed on pressure fluctuations in a double-suction centrifugal pump

Author:
Wang, Zhiyuan; Qian, Zhongdong; Lu, Jie; Wu, Pengfei
Source:
Energy 2019 v.170 pp. 212-227
ISSN:
0360-5442
Subject:
pressure,   etc   ; centrifugal pumps; energy; equipment performance;     Show all 4 Subjects
Abstract:
... Pressure fluctuations in double-suction centrifugal pumps are greatly affected by the flow rate and rotational speed. An experimental investigation was carried out to determine effects of the flow rate and rotational speed for optimizing the hydraulic design and realizing stable operation. Pressure fluctuation signals were obtained at five measurement points along the suction chamber and four meas ...
DOI:
10.1016/j.energy.2018.12.112

12. 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

13. 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

14. Correction to: A priori dietary patterns and blood pressure in the EPIC Florence cohort: a cross-sectional study

Author:
Bendinelli, B.; Masala, G.; Bruno, R. M.; Caini, S.; Saieva, C.; Boninsegni, A.; Ungar, A.; Ghiadoni, L.; Palli, D.
Source:
European journal of nutrition 2019 v.58 no.1 pp. 467-469
ISSN:
1436-6207
Subject:
blood pressure,   etc   ; cross-sectional studies; eating habits;     Show all 3 Subjects
Abstract:
... In the original publication of the article have been published in an incorrect form. The correct form is given below. ...
DOI:
10.1007/s00394-018-1841-8

15. Vapor pressure measurements of AgBr by the Knudsen effusion method

Author:
Nagata, Tetsuya; Iizuka, Atsushi; Shibata, Etsuro
Source:
Thermochimica acta 2019 v.671 pp. 32-35
ISSN:
0040-6031
Subject:
vapor pressure,   etc   ; equations; liquids; silver; temperature; vapors;     Show all 6 Subjects
Abstract:
... The vapor pressure of silver bromide (AgBr) liquid was measured by the Knudsen effusion method. The ratio of the vapor species of silver bromide was calculated from the literature Hildenbrand and Lau, Pankratz [3,6], and the vapor pressures were calculated on the basis of the ratio. As reported in the literature Hildenbrand and Lau [3], we considered the vapor species to be monomers (AgBr) and tri ...
DOI:
10.1016/j.tca.2018.10.027

16. Experimental hyperbaric chamber trials reveal high resilience to barotrauma in Australian snapper (Chrysophrys auratus)

Author:
Hughes, Julian M.; Stewart, John; Collins, Damian
Source:
Fisheries research 2019 v.212 pp. 172-182
ISSN:
0165-7836
Subject:
ambient pressure; atmospheric pressure,   etc   ; death; monitoring; mortality; physiology; snapper; sport fishing; statistical analysis; swim bladder; Australia;     Show all 11 Subjects
Abstract:
... A key factor affecting survival of fish which are captured at depth and subsequently released is barotrauma. Barotrauma are a suite of injuries which occur as a result of the decreasing ambient pressure experienced by a fish during capture and are caused by expanding swim bladder gas and formation of gas embolisms. Snapper (Chrysophrys auratus) are of key importance to both commercial and recreati ...
DOI:
10.1016/j.fishres.2018.12.024

17. Rice Bran Supplement Containing a Functional Substance, the Novel Peptide Leu-Arg-Ala, Has Anti-Hypertensive Effects: A Double-Blind, Randomized, Placebo-Controlled Study

Author:
Ogawa, Yutaro; Shobako, Naohisa; Fukuhara, Ikuo; Satoh, Hisao; Kobayashi, Etsuko; Kusakari, Takashi; Suwa, Makoto; Matsumoto, Motonobu; Ishikado, Atsushi
Source:
Nutrients 2019 v.11 no.4
ISSN:
2072-6643
Subject:
diastolic blood pressure; systolic blood pressure,   etc   ; antihypertensive effect; hypertension; peptides; placebos; rice bran;     Show all 7 Subjects
Abstract:
... The anti-hypertensive effect of processed rice bran (PRB) was recently reported, for which the novel peptide Leu-Arg-Ala (LRA) was identified as the functional substance. The purpose of this study was to assess the anti-hypertensive effects of a rice bran supplement containing PRB in individuals with high-normal blood pressure (systolic blood pressure (SBP): 130–139 mmHg and/or diastolic blo ...
DOI:
10.3390/nu11040726

18. Experimental study on auto-ignition characteristics of a butanol-hexadecane droplet under elevated pressures and temperatures

Author:
Zhang, Yu; Huang, Ronghua; Chen, Xi; Qin, Tian; Huang, Sheng; Zhou, Pei; Lou, Chun
Source:
Energy 2019 v.171 pp. 654-665
ISSN:
0360-5442
Subject:
ambient pressure; atmospheric pressure,   etc   ; ambient temperature; butanol; combustion; droplets; evaporation; fuels; transportation; vapors;     Show all 10 Subjects
Abstract:
... Auto-ignition characteristics of a butanol-hexadecane droplet were researched under ambient gauge pressures of 5 and 10 bar and ambient temperatures of 553, 633 and 713 K. Butanol-hexadecane blends of 0%, 25% and 50% n-butanol by mass (hereafter denoted by BUT’XX′) were tested in a bilayer-structure chamber (BSC). Five sub-stages were observed, namely stable evaporation, faint partially premixed c ...
DOI:
10.1016/j.energy.2019.01.046

19. 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

20. Formation and Stability of Surface/Bulk Nanobubbles Produced by Decompression at Lower Gas Concentration

Author:
Fang, Zhou; Wang, Lei; Wang, Xingya; Zhou, Limin; Wang, Shuo; Zou, Zhenglei; Tai, Renzhong; Zhang, Lijuan; Hu, Jun
Source:
Journal of physical chemistry 2018 v.122 no.39 pp. 22418-22423
ISSN:
1932-7455
Subject:
pressure,   etc   ; gases; nanobubbles; physical chemistry;     Show all 4 Subjects
Abstract:
... Nanobubbles have many fascinating properties and the mechanism of their formation and stability still needs further exploration. According to the conventional theory and experiences, it was suggested that surface/bulk nanobubbles would only be produced at conditions of high gas concentration and stabilized in a gas oversaturated state. However, we showed here that both surface and bulk nanobubbles ...
DOI:
10.1021/acs.jpcc.8b05688