scholarly journals Parameters of electrostatic spraying and its influence on the application efficiency

Revista CERES ◽  
2013 ◽  
Vol 60 (4) ◽  
pp. 474-479 ◽  
Author(s):  
Robson Shigueaki Sasaki ◽  
Mauri Martins Teixeira ◽  
Haroldo Carlos Fernandes ◽  
Paulo Marcos de Barros Monteiro ◽  
Denílson Eduardo Rodrigues ◽  
...  
Keyword(s):  
Deposition Efficiency ◽  
System Efficiency ◽  
Mass Ratio ◽  
Target Orientation ◽  
Faraday Cage ◽  
Charge Mass ◽  
Electrostatic Spraying ◽  
Conventional Systems ◽  
Liquid Deposition ◽  
Electrostatic System

When the electrostatic spraying is used correctly, it provides advantages over conventional systems, however many factors can affect the system efficiency. Therefore, the objective of this study was to evaluate the charge/mass ratio (Q/M) at different spraying distances (0, 1, 2, 3, 4 and 5 m), and the liquid deposition efficiency on the target. Evaluating the Q/M ratio the Faraday cage method was used and to evaluate the liquid deposition efficiency the artificial targets were positioned longitudinally and transversely to the spray jet. It was found that the spraying distance affects the Q/M ratio, consequently, the liquid deposition efficiency. For the closest distance to the target the Q/M ratio was 4.11 mC kg-1, and at distances of 1, 2, 3, 4 and 5 m, the ratio decreased to 1.38, 0.64, 0.31, 0.17 and 0.005 mC kg-1, respectively. For the liquid deposition, the electrostatic system was affected by the target orientation and spraying distance. The target transversely to the jet of liquid did not improve the liquid deposition, but longitudinally increased the deposition up to 3 meters of distance.

A 16-parts-per-trillion measurement of the antiproton-to-proton charge–mass ratio

Nature ◽  
2022 ◽  
Vol 601 (7891) ◽  
pp. 53-57
Author(s):  
M. J. Borchert ◽  
J. A. Devlin ◽  
S. R. Erlewein ◽  
M. Fleck ◽  
J. A. Harrington ◽  
...  
Keyword(s):  
Mass Ratio ◽  
Charge Mass ◽  
Proton Charge

scholarly journals Spray technology for deposition of droplets on coffee leaves and fruits1

2021 ◽  
Vol 51 ◽  
Author(s):  
Renan Zampiróli ◽  
Cleyton Batista de Alvarenga ◽  
Matheus Vilhena Parenti ◽  
João Paulo Arantes Rodrigues da Cunha ◽  
Fernando Juari Celoto ◽  
...  
Keyword(s):  
Application Rate ◽  
Electrostatic Spraying ◽  
System A ◽  
Coffee Plants ◽  
Coffee Cultivation ◽  
Upper Third ◽  
Electrostatic System

ABSTRACT The correct deposition of spray along the canopy is important for the phytosanitary control in coffee plants; however, the structure of the plant makes this distribution difficult. This study aimed to evaluate the deposition of a tracer on leaves and fruits in coffee cultivation, with respect to the application rate and type of hydraulic nozzle, as well as the use of an electrostatic spraying system. A hydropneumatic sprayer was used, with hydraulic nozzles of empty conical jet of the series TVI (coarse droplets with air induction) or JA (fine droplets), at rates of 200 and 400 L ha-1. An electrostatic system, with SPE-2 nozzle and rate of 200 L ha-1, was also evaluated. The deposition of the tracer on leaves and fruits of the upper, middle and lower thirds of the trees, as well as the losses to the ground in the canopy projection, were quantified using spectrophotometry. The results indicated that the electrostatic application provides a greater deposition on leaves of the upper third than the hydropneumatic application, regardless of the application rate. The use of the TVI nozzle results in a greater deposition on the fruits of the middle third and a greater loss to the ground than the JA nozzle. Although an application rate of 400 L ha-1 results in a greater deposition on the fruits of the middle third than an application rate of 200 L ha-1, it also causes a greater loss to the ground.

scholarly journals Hawking radiation as irreversible tunneling through self-interaction

2014 ◽  
Vol 29 (13) ◽  
pp. 1450065
Author(s):  
Wen-Yu Wen
Keyword(s):  
Black Holes ◽  
Upper Bound ◽  
Hawking Radiation ◽  
Irreversible Process ◽  
The Self ◽  
Mass Ratio ◽  
Tunneling Model ◽  
Charge Mass ◽  
Self Force

In this paper, we study the self-force in the Parikh–Wilczek tunneling model of Hawking radiation for Reissner–Nordström (RN) black holes. We conclude that the repulsive self-force speeds up the emission and the radiation becomes an irreversible process. We also find an upper bound of charge–mass ratio for emitted particles.

Surface Modification of Epoxy-Ceramic Coatings by Plasma Treatment

2012 ◽  
Vol 161 ◽  
pp. 167-171
Author(s):  
Ai Jun Yan ◽  
La Jun Feng ◽  
Hong Yan Shen ◽  
Jian Wu
Keyword(s):  
Plasma Treatment ◽  
Epoxy Resin ◽  
Transmission Lines ◽  
Oxygen Plasma ◽  
Ceramic Coatings ◽  
Oxygen Plasma Treatment ◽  
Mass Ratio ◽  
Electrostatic Spraying ◽  
Wetting Property ◽  
Spraying Process

A coating was made by electrostatic spraying of epoxy resin / TiO2 particles for the purpose of suppressing audible noise caused by corona discharge on high-voltage transmission lines. Wetting property of the coating was improved by oxygen plasma treatment. It was found that the coating became more wettable as the increase of TiO2 content during electrostatic spraying process. With respect to the coating for suppression of audible noise from transmission lines, the optimal mass ratio of TiO2 particles (diameter:5-10μm ) to epoxy resin was 30%, and the contact angle was 73°on the epoxy / TiO2 coating surface which could be reduced to less than 5°after oxygen plasma treatment for 20s.

Particle Segregation at Contact Lines of Evaporating Colloidal Drops: Influence of the Substrate Wettability and Particle Charge–Mass Ratio

Langmuir ◽  
2015 ◽  
Vol 31 (24) ◽  
pp. 6632-6638 ◽  
Author(s):  
Diego Noguera-Marín ◽  
Carmen L. Moraila-Martínez ◽  
Miguel A. Cabrerizo-Vílchez ◽  
Miguel A. Rodríguez-Valverde
Keyword(s):  
Particle Charge ◽  
Mass Ratio ◽  
Contact Lines ◽  
Particle Segregation ◽  
Charge Mass

A Discussion on solar studies with special reference to space observations - Solar cosmic rays

1971 ◽  
Vol 270 (1202) ◽  
pp. 167-174 ◽  
Keyword(s):  
Cosmic Rays ◽  
Special Reference ◽  
Source Region ◽  
Mass Ratio ◽  
Solar Cosmic Rays ◽  
Charge Mass ◽  
Relative Abundances ◽  
Solar Particles ◽  
Precise Interpretation ◽  
Space Observations

A wealth of data on many aspects of solar cosmic rays has been collected over the last decade. One of the most striking features of these events has been the tremendous variation in many of their characteristics and the related difficulty of precise interpretation. However, one feature of the solar cosmic rays which does seem to be constant from event to event and within an event is the relative abundances of the multicharged nuclei with the same charge: mass ratio. This paper will concentrate on observations of the composition of solar particles and their interpretation. A brief discussion on the propagation of the energetic solar particles including a few comments on the source region will also be given.

Sign in / Sign up

Export Citation Format

Share Document