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Equation of state of KI up to 150 GPa KI高达150GPa的状态方程
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-07-03 DOI: 10.1080/08957959.2023.2233680
Robin Fréville, A. Dewaele, N. Guignot, G. Garbarino, M. Mezouar
ABSTRACT The equation of state of potassium iodide, KI, has been determined up to 156 GPa at 298 K by angular-dispersive X-ray diffraction in diamond-anvil-cell. Helium pressure transmitting medium was used to minimize non-hydrostatic stress on the sample. The B2 phase is stable at least between 2 and 156 GPa. Pressure–volume data were fitted using a Rydberg–Vinet equation of state. The volume, isothermal bulk modulus and its pressure derivative of B2-KI at ambient pressure are , GPa and . It allows using KI as a pressure calibrant in high pressure experiments.
摘要在金刚石砧室中,用角色散X射线衍射法测定了298K下碘化钾的状态方程KI,最高可达156GPa。氦压力传输介质用于最小化样品上的非静水应力。B2相至少在2和156GPa之间是稳定的。使用Rydberg–Vinet状态方程拟合压力-体积数据。B2-KI在环境压力下的体积、等温体积模量及其压力导数分别为,GPa和。它允许在高压实验中使用KI作为压力校准器。
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引用次数: 0
Large volume multianvil cell assembly for hydrothermal synthesis and conversions up to 6.5 GPa and 400°C 用于水热合成和转化率高达6.5的大体积多环境电池组件 GPa和400°C
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-07-03 DOI: 10.1080/08957959.2023.2230348
Logan J. Leinbach, Isaac R. Rhoden, K. Leinenweber, O. Andersson, A. Gordeeva, U. Häussermann
ABSTRACT A multianvil cell assembly with octahedral edge length 25 mm has been adapted for high pressure investigations involving water-rich environments up to 6.5 GPa and 400°C. Water-rich samples are confined in Teflon containers with a volume up to 300 mm3. Applicability tests were performed between 250 and 400°C by investigating the transformation of amorphous titania particles close to the rutile–TiO2-II (∼5 GPa) phase boundary, and the transformation of amorphous silica particles close to the quartz–coesite (∼2.5 GPa) and coesite–stishovite (∼7 GPa) phase boundaries. The performed experiments employed 25.4 mm tungsten carbide anvils with a truncation edge length of 15 mm. The sample pressure at loads approaching 820 t was estimated to be around 6.5 GPa. The large volume multianvil cell is expected to have broad and varied application areas, ranging from the simulation of geofluids to hydrothermal synthesis and conversion/crystal growth in aqueous environments at gigapascal pressures.
摘要八面体边长为25的多环境单元组件 mm已适用于涉及高达6.5的富水环境的高压研究 GPa和400°C。富含水的样品被限制在体积高达300 mm3的聚四氟乙烯容器中。适用性测试是在250和400°C之间进行的,通过研究接近金红石-TiO2 II(~5 GPa)相边界,以及靠近石英-柯石英矿的无定形二氧化硅颗粒的转变(~2.5 GPa)和球藻石-stishovite(~7 GPa)相边界。所进行的实验采用25.4 mm碳化钨砧,截边长度为15 mm。在接近820t的载荷下,样品压力估计约为6.5 GPa。大体积多环境电池预计将具有广泛而多样的应用领域,从模拟地质流体到在千兆帕压力下的水环境中的水热合成和转化/晶体生长。
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引用次数: 0
Correction 校正
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-07-03 DOI: 10.1080/08957959.2023.2225889
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引用次数: 0
Use of finite element analysis for the thermal gradient determination of a neutron transparent high-pressure sample environment for neutron tomography 有限元分析在中子层析成像中子透明高压样品环境热梯度测定中的应用
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-06-24 DOI: 10.1080/08957959.2023.2225702
Vili Grigorova, S. Shcheka, F. Salehi, K. Kamenev, S. Clark
ABSTRACT A 3D Finite Element Analysis model was developed to describe the temperature distribution inside a novel neutron transparent high-pressure sample assembly. The validity of the model was established by conducting experimental validation. The Finite Element Analysis model was utilised to evaluate the sample assembly’s temperature gradients and optimise its geometry and components. The results indicate that the discrepancy between the temperature recorded in the laboratory using thermocouples and the temperature calculated by the Finite Element Analysis model was only 4% under the assumption that the thermocouple was positioned in the middle of the sample assembly. The models further demonstrate that the Finite Element Analysis approach is a valuable tool for optimising the sample assembly by considering the impact of different materials and variations in the shape of its components.
摘要建立了一个三维有限元分析模型来描述新型中子透明高压样品组件内的温度分布。通过实验验证了该模型的有效性。有限元分析模型用于评估样品组件的温度梯度,并优化其几何形状和组件。结果表明,在假设热电偶位于样品组件中间的情况下,使用热电偶在实验室记录的温度与有限元分析模型计算的温度之间的差异仅为4%。模型进一步证明,有限元分析方法是一种有价值的工具,可以通过考虑不同材料的影响及其部件形状的变化来优化样品组件。
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引用次数: 0
High pressure Raman study of Na4Ca(CO3)3 from the ambient pressure to 11 GPa Na4Ca(CO3)3的高压拉曼光谱研究 GPa
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-06-04 DOI: 10.1080/08957959.2023.2218535
S. Rashchenko, M. Kolesnichenko, Anastasia O. Mikhno, A. Shatskiy
ABSTRACT Na-Ca double carbonates were found as the inclusions in ‘superdeep’ Juina diamonds and as the products of high pressure experiments and thus are regarded as the potential host of CO2 in the deep mantle. Recently, Na-rich carbonate (21.0% wt. of Na2O vs. 13.6% wt. of CaO) was reported as the product of experiment with carbonated eclogite treated at 21 GPa and 1200°C. Na/Ca ratio of this carbonate corresponds to Na4Ca(CO3)3 phase with cubic symmetry synthesized at 6 GPa. The stability of Na4Ca(CO3)3 at higher pressures has not been investigated yet. Herein, we report an in situ Raman study of Na4Ca(CO3)3 carbonate up to 11 GPa in order to reveal stability of its structure at mantle pressures. Obtained results strongly imply for reversible phase transition near 8 GPa associated with decrease of symmetry. The observed phase transition questions the stability of cubic Na4Ca(CO3)3 under conditions of mantle transition zone.
摘要Na-Ca双碳酸盐是“超深”朱纳金刚石中的包裹体,也是高压实验的产物,因此被认为是深地幔中CO2的潜在宿主。最近,富含钠的碳酸盐(21.0%重量的Na2O与13.6%重量的CaO)被报道为碳酸化榴辉岩在21℃处理的实验产物 GPa和1200°C。该碳酸盐的Na/Ca比对应于在6合成的具有立方对称性的Na4Ca(CO3)3相 GPa。Na4Ca(CO3)3在较高压力下的稳定性尚未得到研究。在此,我们报道了Na4Ca(CO3)3碳酸盐的原位拉曼研究,最高可达11 GPa,以揭示其结构在地幔压力下的稳定性。所获得的结果强烈暗示了在8附近的可逆相变 GPa与对称性降低有关。观察到的相变对立方Na4Ca(CO3)3在地幔过渡带条件下的稳定性提出了质疑。
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引用次数: 0
hpMCA: a Python-based graphical program for energy-dispersive X-ray diffraction data collection and analysis hpMCA:基于python的能量色散x射线衍射数据收集和分析的图形程序
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-05-27 DOI: 10.1080/08957959.2023.2209731
R. Hrubiak, M. Rivers
ABSTRACT Energy-dispersive X-ray diffraction (EDXD) at synchrotron beamlines is commonly used for the study of material properties under high pressure and/or high temperature. Experimenters typically rely on the availability of robust data collection and analysis at a beamline, but this has become increasingly difficult, especially with the introduction of multi-element detectors that generate complex, multi-dimensional data sets. These data sets have energy resolution, and they can also be resolved in relation to sample position, diffraction angle, or different external stimuli. We report a new Python-based graphical program, hpMCA, for EDXD data collection and analysis that streamlines the experimental process for the beamline users. The program features a user-friendly interface, capability for online viewing and analyzing data from multi-element energy-dispersive detectors, and includes features useful for working with samples under high pressure and/or high temperature, such as crystal phase identification, real-time unit cell lattice refinement, and pressure determination based on an equation of state.
同步加速器束线的能量色散X射线衍射(EDXD)通常用于研究高压和/或高温下的材料性能。实验人员通常依赖于波束线上强大的数据收集和分析的可用性,但这变得越来越困难,尤其是随着产生复杂多维数据集的多元探测器的引入。这些数据集具有能量分辨率,还可以根据样品位置、衍射角或不同的外部刺激进行解析。我们报告了一个新的基于Python的图形程序hpMCA,用于EDXD数据收集和分析,该程序简化了波束线用户的实验过程。该程序具有用户友好的界面,能够在线查看和分析多元素能量色散探测器的数据,并包括在高压和/或高温下处理样品的有用功能,如晶相识别、实时晶胞晶格细化和基于状态方程的压力确定。
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引用次数: 0
The use of LEDs as a light source for fluorescence pressure measurements 使用led作为荧光压力测量的光源
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-05-14 DOI: 10.1080/08957959.2023.2209902
R. Khasanov, M. Elender, S. Klotz
ABSTRACT We discuss the use of commercial high power light emitting diodes (LEDs) as a light source for fluorescence pressure measurements. The relatively broad light emitting spectra of single color LEDs (in comparison with lasers) do not prevent producing narrow fluorescence lines at least for two widely used pressure indicator materials, namely ruby ( ) and strontium tetraborate ( ). Strongest responses of both pressure gauges were detected for the green color LEDs with the average wavelength . LEDs might be easily implemented for producing fiber-coupled, as well as the parallel light sources. LEDs were found to be efficient to replace laser sources in piston-cylinder cell and diamond anvil cell fluorescence pressure measurement setups.
我们讨论了商用大功率发光二极管(led)作为荧光压力测量光源的使用。单色led相对较宽的发光光谱(与激光相比)并不妨碍产生狭窄的荧光线,至少对于两种广泛使用的压力指示材料,即红宝石()和四硼酸锶()。两种压力表对平均波长的绿色led的响应最强。led可以很容易地实现生产光纤耦合光源,以及并联光源。在活塞缸池和金刚石砧池的荧光压力测量装置中,发现led可以有效地取代激光源。
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引用次数: 0
Salting and slight drying as combination pretreatments to alleviate quality alteration of raw grass carp fillets after high pressure processing 盐渍和微干燥联合预处理对减轻草鱼鱼片高压加工后品质变化的影响
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-04-03 DOI: 10.1080/08957959.2023.2198647
Linyun Chen, Bian-Sheng Li, Zheng Ruan, Jiang Qian
ABSTRACT High pressure can induce significant sensory quality changes in fish. Considering the important role of raw attributes in ready-to-eat aquatic products, our study thus focused on combination treatments prior to pressurization, to maintain grass carp quality. Fish fillets with or without salting and/or slight drying were pressurized under 0.1, 300, 400, and 500 MPa for 10 min. Microbiological, sensorial, and chemical analyses were performed to assess fish quality. The salting and slight drying combination have synergistic impacts on alleviation of fish quality changes after pressurization, e.g. muscle semi-transparency, lower lightness, and stronger water-holding capacity. This could be associated with enhanced fibrous interconnection and protein structure (less decrease of α-helix contents, less amino acid residue exposures). By contrast, fillets without pretreatments, or after single salting or drying process, had unfavorable quality alterations after pressurization. Therefore, appropriate means for developing novel ready-to-eat products can be carried out by targeting pressure-sensitive aquatic foods.
摘要高压会引起鱼类感官质量的显著变化。考虑到原料属性在即食水产品中的重要作用,我们的研究重点是在加压前进行组合处理,以保持草鱼的质量。在0.1、300、400和500下对有或没有腌制和/或轻微干燥的鱼片加压 MPa,适用于10 min进行微生物、感官和化学分析,以评估鱼类的质量。腌制和轻微干燥的组合对缓解加压后的鱼类质量变化具有协同作用,例如肌肉半透明、较低的亮度和较强的保水能力。这可能与增强纤维互连和蛋白质结构有关(α-螺旋含量减少较少,氨基酸残基暴露较少)。相比之下,未经预处理的鱼片,或经过单一腌制或干燥工艺的鱼片,在加压后质量发生了不利的变化。因此,开发新型即食产品的适当手段可以通过针对压敏水性食品来实现。
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引用次数: 1
Effect of high-hydrostatic-pressure processing on catechin content in green tea leaves 高静压加工对绿茶叶中儿茶素含量的影响
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-04-02 DOI: 10.1080/08957959.2023.2195110
Hsiuming Liu, S. Ueno, T. Araki
ABSTRACT Green tea catechins can improve human health, and their retention during processing is a concern. High hydrostatic pressure (HHP) blanching is a nonthermal processing that can increase both nutrients and flavor in tea. Thermal blanching retains catechins but decreases nutrients and flavor. We investigated catechin retention potency via HHP and thermal treatment. Fresh green tea leaves were pressurized at 100–800 MPa and/or heated for 10 min at 40°C–70°C and then stored for 24 hours. Tea catechin content was drastically reduced after storage without HHP, which yielded a 1.5–8.0-fold increase. HHP showed a smiling curve relationship with catechin retention, with the highest levels found at 200 and 800 MPa. Synergistic effects of HHP on thermal processing were found at 40°C–50°C but not at 60°C–80°C. Processing at 200 MPa combined with 50°C yielded 88% catechin retention. Our results suggest this combination as an optimal strategy for retaining tea catechins, nutrients, and flavor.
绿茶儿茶素具有促进人体健康的作用,其在加工过程中的残留一直是人们关注的问题。高压水静压烫烫是一种可以增加茶叶营养和风味的非热处理方法。热烫保留了儿茶素,但减少了营养和风味。我们通过高温高压和热处理研究了儿茶素的保留效力。新鲜绿茶在100-800 MPa的压力下和/或在40°C - 70°C下加热10分钟,然后保存24小时。不加HHP贮藏后,茶儿茶素含量显著降低,增加1.5 ~ 8.0倍。HHP与儿茶素保留率呈微笑曲线关系,在200和800 MPa时最高。在40°C - 50°C时发现HHP对热处理的协同效应,而在60°C - 80°C时则没有。在200 MPa和50°C下处理,儿茶素保留率为88%。我们的研究结果表明,这种组合是保留茶儿茶素、营养和风味的最佳策略。
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引用次数: 0
Vacuum impregnation of liquid into carrot assisted by high hydrostatic pressure 高静压辅助液体真空浸渍胡萝卜
IF 2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-03-31 DOI: 10.1080/08957959.2023.2195109
Ming Gao, Kazuki Nomura, Y. Ando, Yoshiko Nakaura, Zhenya Zhang, Kazutaka Yamamoto
ABSTRACT Carrot was impregnated with pigment solution by vacuum heat sealing (VS) and/or high hydrostatic pressure treatment (HHP; 100–600 MPa, 25°C, 5 min). Impregnation efficacy was evaluated as impregnation ratio (%) by image analysis, while damages of cell membrane and texture were quantified by electrical impedance spectroscopy and texture analysis, respectively. Combinations of VS and HHP exclusively achieved 100% impregnation. Meanwhile, the damages were comparable between the samples after VS and VS + 100 MPa treatment and aggravated by elevated levels of HHP. As for the texture, breaking stress (hardness) decreased after VS and VS + HHP (100–600 MPa) comparably. Meanwhile, breaking strain (deformability) significantly increased after VS + HHP (200–600 MPa), indicating further damage of strain texture as compared with that after VS and VS + 100 MPa treatments. It was indicated that impregnation of carrot was fully achieved by a combination of VS and 100 MPa treatment, while minimizing the cell membrane and texture damages. Difference in the impregnation efficacy between carrot and apple was discussed based on their image data.
摘要:胡萝卜通过真空热封(VS)和/或高静压处理(HHP;100-600)用颜料溶液浸渍 MPa,25°C,5 分钟)。浸渍效果通过图像分析评估为浸渍率(%),而细胞膜和质地的损伤分别通过电阻抗谱和质地分析进行量化。VS和HHP的组合仅实现了100%的浸渍。同时,VS和VS后的样本之间的损伤是可比较的 + 100 MPa治疗,并因HHP水平升高而加重。关于织构,VS和VS后断裂应力(硬度)降低 + HHP(100–600 MPa)。同时,VS后断裂应变(变形能力)显著增加 + HHP(200–600 MPa),表明与VS和VS之后相比,应变织构的进一步损伤 + 100 MPa处理。结果表明,VS和100的组合可以完全实现胡萝卜的浸渍 MPa处理,同时最大限度地减少细胞膜和纹理损伤。基于图像数据,讨论了胡萝卜和苹果在浸渍效果上的差异。
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引用次数: 1
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High Pressure Research
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