Results 21 to 30 of about 8,989,935 (300)

Physico-chemical studies on some saccharides in aqueous cellulose solutions at different temperatures – Acoustical and FTIR analysis

open access: yesJournal of Saudi Chemical Society, 2014
The ultrasonic velocity (u), density (ρ) and viscosity (η) of Fructose, Lactose and Sucrose in 0.4 M of Hydroxy Propyl Methyl Cellulose (HPMC) solutions have been investigated at 303, 313 and 323 K, respectively.
S. Punitha   +3 more
doaj   +1 more source

Improving acoustical characteristics of a Gothic cathedral using simple public address system: A case study of Myeong-dong Cathedral in Seoul, Korea

open access: yesFrontiers of Architectural Research, 2017
In the present study, improving acoustical characteristics of a Gothic cathedral (Myeong-dong Cathedral, which is the first built Western Gothic-style architecture in Korea) using simple public address system were investigated.
In Hwan Hwang, Won Gab Choi
doaj   +1 more source

Ultrasonic Investigation of Molecular Interactions in Binary Mixtures at 303 K

open access: yesE-Journal of Chemistry, 2009
The ultrasonic velocity, density and viscosity at 303 K have been measured in the binary systems of toluene with benzene and o-xylone with benzene. The acoustical parameters such as adiabatic compressibility, free length, free volume and acoustical ...
R. Nithya   +3 more
doaj   +1 more source

Acoustical Studies of Molecular Interactions in the Solution of Methyl Cobalamine Drug at Different Temperatures and Concentrations

open access: yesOrbital: The Electronic Journal of Chemistry, 2014
In the present study, ultrasonic velocity (U), density (ρ), and viscosity (η) have been measured at frequency 1 MHz in the binary mixtures of methyl cobalamine with water in the concentration range (0.1 to 0.0125%) at 303 K, 308 K, and 313 K using a ...
Ritesh R. Naik, Sheshrao V. Bawankar
doaj   +1 more source

Molecular Association Studies on Polyvinyl Alcohol at Different Concentrations

open access: yesAdvances in Materials Science and Engineering, 2018
Ultrasonic velocities, densities, and viscosities have been measured for the solution of polyvinyl alcohol in water at concentration range of 0.3% to 1% at temperature 35°C.
Richa Saxena, S. C. Bhatt
doaj   +1 more source

Acoustical Parameters of Polyvinyl Alcohol

open access: yesJournal of Mountain Research, 2021
Ultrasonic investigation provides a wealth of information in understanding the intermolecular interaction of solute and solvent. An attempt has been made to measure density, viscosity and ultrasonic velocity of aqueous solution of polyvinyl alcohol of molecular weight approximately 140,000 at different temperatures 35οC, 40oC, 45οC, 50oC, 55οC, 60oC ...
Richa Saxena   +3 more
openaire   +1 more source

The sound of trustworthiness: Acoustic-based modulation of perceived voice personality. [PDF]

open access: yesPLoS ONE, 2017
When we hear a new voice we automatically form a "first impression" of the voice owner's personality; a single word is sufficient to yield ratings highly consistent across listeners.
Pascal Belin, Bibi Boehme, Phil McAleer
doaj   +1 more source

Acoustically quality evaluation of date palm samples from the pith to the bark [PDF]

open access: yesIranian Journal of Wood and Paper Industries, 2018
This paper investigated the radial variations of acoustical and mechanical properties of date palm from the pith to the bark. Cubic samples with dimensions of 2×2×35 cm3 (Radial× tangential ×longitudinal)) were taken in distance of 3, 6, 9, 12 and 15 cm ...
mohammadali saadatnia   +3 more
doaj  

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

A Study of Concentration and Temperature Dependent Effect on Speed of Sound and Acoustical Parameters in Zinc Oxide Nanofluid

open access: yes, 2016
Ultrasonic propagation through nanofluids has now become a subject of great interest. It is a typical technique to examine the structure formation in nanofluid.
Vijayta Gupta   +4 more
semanticscholar   +1 more source

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