Role of various nano-particles in prevention of fungal decay, mold growth and termite attack in wood, and their effect on weathering properties and water repellency

Background: Captopril is the synthetic dipeptide used as an angiotensin converting enzyme inhibitor. Captopril is used to treat hypertension as well as for the treatment of moderate heart failure. Analytical instrumentation and methodology plays an important role in pharmaceutical analysis. Methods: This review presents some important applications of electrochemical modes used for the analysis of captopril. So far captopril has been analyzed by using different bare and modified working electrodes with a variety of modifiers from organic and inorganic materials to various types of nano particles/materials. Results: This paper presents some of the methods which have been published in the last few years i.e. from 2003 to 2016. This review highlights the role of the analytical instrumentation, particularly electrochemical methods in assessing captopril using various working electrodes. Conclusion: A large number of studies on voltammetry noted by means of various bare and modified electrodes. Among all of the published voltammetric methods, DPV, SWV, CV and miscellaneous modes were trendy techniques used to analyze captopril in pharmaceutical formulations as well as biological samples. Electrodes modified with nanomaterials are promising sensing tools as this showed high sensitivity, good accuracy with precision as well as selectivity. In comparison to chromatographic methods, the main advantages of electrochemical methods are its cheaper instrumentation, lower detection limit and minimal or no sample preparation.

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Role of Ti and Y in the nucleation of the primary α-Al of Al7075–Ti–Y natural composites and influence of ultrasonic vibration

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.1515/ijmr-2020-8143 ◽

2021 ◽

Vol 112 (8) ◽

pp. 652-664

Author(s):

Xiao-Hui Chen ◽

Lei Liu ◽

Jinbo Li ◽

Fayun Zhang

Keyword(s):

Reaction Kinetics ◽

Grain Refinement ◽

Ultrasonic Vibration ◽

Nano Particles ◽

Influencing Mechanism ◽

Ultrasonic Time ◽

Natural Composites ◽

Corrosion Pits ◽

Main Factor

Abstract Al7075–Ti–Y natural composites were prepared by using a combination of ultrasonic vibration and casting. The effects of titanium (Ti) and yttrium (Y) on the nucleation of primary α-Al were studied and the influencing mechanism of Y on the TiAl3 formation was analysed. Furthermore, a reaction kinetics model of TiAl3 under ultrasonic vibration was established. The results showed that the uniformly distributed TiAl3 and Al3Y nano-particles resulted in grain refinement. Y changed the morphology of TiAl3 and the appearance of corrosion pits was related to the fact that Y was dissolved within the TiAl3 structure to form Ti(Al,Y)3. The established model revealed that ultrasonic vibration significantly promoted the formation of TiAl3, and that ultrasonic time was the main factor affecting its growth.

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Superconductivity of embedded lead nano particles in metallic and amorphous matrices

MRS Proceedings ◽

10.1557/proc-703-v13.22 ◽

2001 ◽

Vol 703 ◽

Author(s):

K. Chattopadhyay ◽

V. Bhattacharya ◽

A. P. Tsai

Keyword(s):

Transition Temperature ◽

Superconducting Transition Temperature ◽

Magnetic Measurements ◽

Microstructural Characterization ◽

Rapid Solidification Processing ◽

Nano Particles ◽

Superconducting Transition ◽

Solidification Processing ◽

Embedded Particles

ABSTRACTNanodispersed lead in metallic and amorphous matrices was synthesized by rapid solidification processing. The optimum microstructure was tailored to avoid percolation of the particles. With these embedded particles it is possible to study quantitatively the effect of size on the superconducting transition temperature by carrying out quantitative microstructural characterization and magnetic measurements. Our results suggest the role of the matrices in enhancement or depression of superconducting transition temperature of lead. The origin of this difference in behavior with respect to different matrices and sizes is discussed.

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The role of tree stem proximity in the spatial variability of soil water repellency in a eucalypt plantation in coastal Portugal

Soil Research ◽

10.1071/sr04096 ◽

2005 ◽

Vol 43 (3) ◽

pp. 251 ◽

Cited By ~ 23

Author(s):

J. J. Keizer ◽

A. J. D. Ferreira ◽

C. O. A. Coelho ◽

S. H. Doerr ◽

M. C. Malvar ◽

...

Keyword(s):

Soil Water ◽

Water Repellency ◽

Soil Water Repellency ◽

Individual Measurement ◽

Hydrophobic Compounds ◽

Ethanol Droplet ◽

Central Portugal ◽

Living Organisms ◽

Tree Stem

Certain organic compounds derived from living organisms or their decaying parts are generally accepted to induce soil water repellency. Water repellency may therefore be expected to increase with proximity to organisms releasing hydrophobic compounds. This hypothesis is tested here for Eucalyptus globulus trees, since eucalypt species are frequently associated with elevated repellency levels. In a young, first-rotation plantation on coastal dune sands in central Portugal, repeat measurements of water repellency using the ‘Molarity of an Ethanol Droplet’ (MED) test were carried out in situ between April 2001 and May 2002. On 25 dates, repellency was measured at initially 2 and later 3 distances on 2 sides of 8–11 randomly selected trees. On 15 occasions, additional repellency measurements were performed within small grids aside 3 of the selected trees. The postulated decrease in topsoil water repellency with increased distance from eucalypt tree stems was found to apply on several individual measurement dates, as well as, more unexpectedly since repellency usually is a transient phenomenon, for the study period as a whole. The results confirm the general association of eucalypt trees with water repellency, and indicate that tree stem proximity is an important but not sufficient factor to explain repellency distribution in topsoil.

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Role of micro and nano-particles of hBN as a secondary solid lubricant for improving tribo-potential of PAEK composite

Tribology International ◽

10.1016/j.triboint.2018.09.028 ◽

2019 ◽

Vol 130 ◽

pp. 400-412 ◽

Cited By ~ 13

Author(s):

Jitendra Narayan Panda ◽

Jayashree Bijwe ◽

Raj K. Pandey

Keyword(s):

Solid Lubricant ◽

Nano Particles

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Factors governing soil water repellency under tillage management: The role of pore structure and hydrophobic substances

Land Degradation and Development ◽

10.1002/ldr.3779 ◽

2020 ◽

Author(s):

Shengping Li ◽

Jinjing Lu ◽

Guopeng Liang ◽

Xueping Wu ◽

Mengni Zhang ◽

...

Keyword(s):

Pore Structure ◽

Soil Water ◽

Water Repellency ◽

Soil Water Repellency ◽

Hydrophobic Substances

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The Frontier Analysis of RCS for Micro-Nano Particle

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.337.526 ◽

2011 ◽

Vol 337 ◽

pp. 526-531 ◽

Cited By ~ 2

Author(s):

Chang Hua Du ◽

Zhen Kang Li ◽

Bin Liu ◽

Chun Tian Li

Keyword(s):

Composite Solder ◽

High Hardness ◽

Nano Particles ◽

Nano Particle ◽

Dispersion Strengthening ◽

Creep Properties ◽

Frontier Analysis ◽

Technical Requirements ◽

Reinforced Composite

By the method of adding MNP (micron or nano particles) into general solder, the composite electronic solder can be prepared, due to its role of solution or dispersion strengthening, and can improve the thermostable fatigue and creep properties of solder joint, it is also usually named as RCS (reinforced composite solder).Based on researchful analysis of RCS, such as metal particles, particles for high hardness, particles for low expansion coefficient, rare-earth particles and low aggregated particle, and of their reinforced mechanism, the technical requirements of RCS is found, it is also analyzed problems and application prospects of RCS.

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Role of electrostatic interactions in the adsorption kinetics of nanoparticles at fluid–fluid interfaces

Physical Chemistry Chemical Physics ◽

10.1039/c5cp05959c ◽

2016 ◽

Vol 18 (7) ◽

pp. 5499-5508 ◽

Cited By ~ 38

Author(s):

Venkateshwar Rao Dugyala ◽

Jyothi Sri Muthukuru ◽

Ethayaraja Mani ◽

Madivala G. Basavaraj

Keyword(s):

Surface Tension ◽

Adsorption Kinetics ◽

Electrostatic Interaction ◽

Electrostatic Interactions ◽

Dynamic Surface Tension ◽

Nano Particles ◽

Fluid Interfaces ◽

Dynamic Surface ◽

Kinetics Of

The dynamic surface tension measurements are used to elucidate the contribution of electrostatic interaction energy barriers for the adsorption of nano-particles to the interfaces.

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