Determination of Benzalkonium Chloride in a Disinfectant by UV Spectrophotometry and Gas and High-Performance Liquid Chromatography: Validation, Comparison of Characteristics, and... by Mariia Smolinska, Roman Ostapiv, Mariia Yurkevych, Liubov Poliuzhyn, Olha Korobova, Ihor Kotsiumbas, Hryhorii Tesliar

“…The temperature of the detector was 250°C, and a mixture of hydrogen, helium, and air in a ratio of 30 : 8.5 : 350 was used in the split of the detector. …”
Get full text

Heliox Improves Carbon Dioxide Removal during Lung Protective Mechanical Ventilation by Charlotte J. Beurskens, Daniel Brevoord, Wim K. Lagrand, Walter M. van den Bergh, Margreeth B. Vroom, Benedikt Preckel, Janneke Horn, Nicole P. Juffermans

“…Introduction. Helium is a noble gas with low density and increased carbon dioxide (CO2) diffusion capacity. …”
Get full text

Laser Doppler Vibrometer: Application of DOE/Taguchi Methodologies to Pyroshock Response Spectra by C. J. Litz

“…The application of design of experiment methodology was made to structure and test a Taguchi L9(32) full factorial experimental matrix (which uses nine tests to study two factors, with each factor examined at three levels) in which a helium-neon laser Doppler vibrometer and two piezocrystal accelerometers were used to monitor explosively induced vibrations ranging from 10 to 105 Hz on a 96 × 48 × 0.25 in. flat steel plate. …”
Get full text

Formation of shallow-acceptor defects in Li-irradiated N-type silicon by Akira Kiyoi, Naoyuki Kawabata

“…Comparative studies with hydrogen, helium and lithium irradiations revealed that the p -type conductivity primarily attributed to a combination of intrinsic defects and lithium-related defect complexes, stable up to 500 °C. …”
Get full text

Investigating Confined Space Asphyxias: Plastic Bag Involvement and Gas Inhalation – A Case Series and Literature Review by Sofija Saulė Kaubrytė, Sigitas Chmieliauskas, Giedrė Kažukauskė, Sigitas Laima, Diana Vasiljevaitė, Jurgita Stasiūnienė

“…The method’s lethality is increased when combined with inert gases like helium, known for their rapid onset of hypoxia and painless nature. …”
Get full text

Modifications on Microporosity and Physical Properties of Cement Mortar Caused by Carbonation: Comparison of Experimental Methods by Son Tung Pham

“…We also examined the evolution of macrophysical properties such as the solid phase volume using helium pycnometry, gas permeability, thermal conductivity, thermal diffusivity, and longitudinal and transverse ultrasonic velocities. …”
Get full text

Polyol-based Synthesis of Praseodymium Oxide Nanoparticles by Caroline Quievryn, Samuel Bernard, Philippe Miele

“…Particles display a BET Specific Surface Area (SSA; 8.75 m² g-1) with a nitrogen adsorption-desorption isotherm of type II and a helium density of powders (d = 5.66 g cm-3).…”
Get full text

Using Hydrogen Peroxide for Rocket Fuel Tank Pressurization: Innovations, Advantages, and Challenges by Mykhailo Vorobei, Mykola Bondarenko

“…The study delves into the thermodynamic and chemical properties of H₂O₂, emphasizing its advantages over traditional pressurizing methods such as nitrogen and helium. Key benefits include higher energy density, cost efficiency, and environmental safety, as H₂O₂ decomposes into water and oxygen. …”
Get full text

Neutron Scattering on Impurity Nanoclusters in Gel Samples by V. B. Efimov, L. P. Mezhov-Deglin, C. D. Dewhurst, A. V. Lokhov, V. V. Nesvizhevsky

“…Results of recent SANS experiments with impurity-helium gel (IHG) samples in He-II are presented. We estimate the mean size of the impurity nanoparticles that form the frame of the IHG samples and discuss the possibility to use IHG samples for the production of ultracold neutrons (UCNs) in He-II cooled to the temperature of a few mK, as well as the reflection of UCNs at any temperature. …”
Get full text

ESSENTIAL OILS PHARMACOPEIALIDENTIFICATION TESTS AND USES by Mobeen Islam

“…The mobile phase in TLC varies from toluene to its combination with ethyl acetate or menthol in different ratios while the mobile phase in GLC is helium. The detection methods used for TLC are UV light and chemical reactions whereas the detector used in GLC is flame ionization. …”
Get full text

Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry by Xiaoqian Zhang, Mengchun Chen, Gaozhong Cao, Guoxin Hu

“…The analysis was carried out on a HP-1MS column (30 m × 0.25 mm, 0.25 μm) with temperature programming, and Helium was used as the carrier gas with a flow rate of 1.0 mL/min. …”
Get full text

Experimental Study on the Effect of Supercritical CO2 on Mechanical Properties and Fracture Characteristics of Longmaxi Shale by Ran Zhang, Hao Yan, Lin Yang, Kun Liao, Lei Tao

“…We studied the mechanical properties and fracture characteristics of a shale under the action of scCO2, nitrogen, helium, and water by comparing the triaxial compression tests of shale samples with seven coring angles. …”
Get full text

Aminopropyl-Functionalized Silica CO2 Adsorbents via Sonochemical Methods by Gregory P. Knowles, Alan L. Chaffee

“…Structural properties of the products were determined by X-ray diffraction, N2 adsorption/desorption (77 K), helium pycnometry, and elemental analysis, and CO2 adsorption/desorption properties were determined via thermogravimetric and differential thermal analysis. …”
Get full text

Simplified Modeling and Simulation of Electricity Production from a Dish/Stirling System by Mahamat Hassane Babikir, Venant Sorel Chara-Dackou, Donatien Njomo, Mahamat Barka, Mahamoud Youssouf Khayal, Daniel Roméo Kamta Legue, Jean Paul Gram-Shou

“…Hydrogen is preferred to helium as the working fluid for operating the Stirling engine at high temperatures. …”
Get full text

Unprecedented Integral-Free Debye Temperature Formulas: Sample Applications to Heat Capacities of ZnSe and ZnTe by R. Pässler

“…Detailed analytical and numerical analyses are performed for combinations of several complementary sets of measured heat capacities, for ZnSe and ZnTe, from the liquid-helium region up to 600 K. The isochoric (harmonic) parts of heat capacities, CVh(T), are described within the frame of a properly devised four-oscillator hybrid model. …”
Get full text

New Applications in Gas Geochemistry by Francesco Italiano, Andrzej Solecki, Giovanni Martinelli, Yunpeng Wang, Guodong Zheng

“…Hydrocarbons are a significant energy resource, helium is applied in many high-tech instruments, and studies of crustal gas dynamics provide insight in the geodynamic processes and help monitor seismic and volcanic hazards. …”
Get full text

Stability and Convergence of Nuclear Detonations in White Dwarf Collisions by Peter Anninos, David Cruz-Lopez, Brighten Jiang, Emanuel Gordis

“…These conclusions apply equally to pure C/O white dwarfs, multispecies compositions (including helium shells), magnetized and unmagnetized cores, and either single or multiple detonation scenarios.…”
Get full text

Design and Analysis of Nuclear Transportation Cask Using Phase Changing Material by Girish Venkatesh Gudi, R. G. Nagraj, Abhijit Dandavate

“…The PCT for spent fuel assemblies for light water reactors operating in helium settings with varying decay heat loads and temperature boundary circumstances was calculated using these simulations. …”
Get full text

Thermodynamic Efficiency of an Advanced 4th Generation VHTR Propulsion Engine for Large Container Ships by Głuch Jerzy, Kodlewicz Tomasz, Drosińska-Komor Marta, Ziółkowska Natalia, Breńkacz Łukasz, Ziółkowski Paweł

“…The direct thermodynamic cycle of the VHTR offers high efficiency, smaller sizes, and flexible power control, thus eliminating the need for helium storage and enabling rapid power changes. In addition, this article highlights the advantages of bypass control of the turbine, which avoids the need to shut down the propulsion engine in the harbour. …”
Get full text

Tritium Breeding Performance Analysis of HCLL Blanket Fusion Reactor Employing Vanadium Alloy (V-5Cr-5Ti) as First Wall Material by Indah Rosidah Maemunah, Zaki Su’ud, Abdul Waris, Dwi Irwanto

“…Meanwhile, the amount of atomic displacement, hydrogen, and helium production are around 22.31 appm, 765.55 appm, and 281.57 appm, respectively. …”
Get full text