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Monday, May 4, 2020 | History

3 edition of Adapting the bubble-time method for measuring viscosity of slash pine oleoresin found in the catalog.

Adapting the bubble-time method for measuring viscosity of slash pine oleoresin

Robert D. McReynolds

Adapting the bubble-time method for measuring viscosity of slash pine oleoresin

by Robert D. McReynolds

  • 103 Want to read
  • 36 Currently reading

Published by Southeastern Forest Experiment Station, U.S. Dept. of Agriculture, Forest Service in Asheville, N.C .
Written in English

    Subjects:
  • Oleoresins -- Viscosity,
  • Slash pine

  • Edition Notes

    Statement[Robert D. McReyonlds and John M. Lane].
    SeriesResearch note SE -- 147., Research note SE -- 147.
    ContributionsLane, John M.
    The Physical Object
    Pagination6 p. :
    ID Numbers
    Open LibraryOL17619497M
    OCLC/WorldCa54055915

    In this case, it is not necessary to measure actual leakage rates to determine the disposition of the test items. The sensitivity of the liquid application technique of bubble testing is adequate for locating leaks with leakage rates in excess of 10 –5 Pa m3s–1 (10 –4 std cm 3s–1). The solution film procedure is widely used on large. 1 Protractor (make sure the 0/° mark can touch the surface of the table when you measure the angle, or else you can’t measure the angle correctly) 1 Masking tape; 1 Ring stand; 1 Blue “Speed of a Bubble” tube (filled with a fluid of which we do not know the viscosity) 1 Metal Screw Clamp; Procedure: 1. Set up the lab as seen in the.

    within 3% with the direct measurement. The mean diameter of the bubble is also in good agreement with the measurement using an acoustic method (e.g., Manasseh et al.[10]). (a) (b) Figure 6 An image of air bubbles generated from a 2mm nozzle. (a) Original image, (b) Detected bubble contour. Dimension (mm) Direct measurement Present Diff. (%). Experimental Study on Comparison of Rising Velocity of Bubbles and Light Weight Particles in the Bubble Column S. M. Walke and Vivek S. Sathe International Journal of Chemical Engineering and Applications, Vol. 3, No. 1, February 25File Size: KB.

    There has recently been considerable interest in the development of devices for the preparation of monodisperse microbubble suspensions for use as ultrasound contrast agents and drug delivery vehicles. These applications require not only a high degree of bubble uniformity but also a maximum bubble size of 8 μm, and this provides a strong motivation for developing an improved understanding of Cited by: in viscosity or elastic modulus and an increase of the phase shift, shown in figure 6. The critical strain for this material, a polypropylene melt is ap-proximately An oscillation strain sweep measurement is usually the first test carried out on an unknown material. All subsequent tests have to be carried out at strains below the critical File Size: 85KB.


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Adapting the bubble-time method for measuring viscosity of slash pine oleoresin by Robert D. McReynolds Download PDF EPUB FB2

A technique is described whereby the kinematic viscosity of slash-resin can be easily measured, in stokes, by an adaptation of the bubble-time method.

Citation: McReynolds, Robert D.; Lane, John M. Adapting the Bubble-Time Method for Measuring Viscosity of Slash Pine Oleoresin. Res. Note SE Cited by: 2. McReynolds RD, Lane JM () Adapting the bubble-time method for measuring viscosity of slash pine oleoresin.

USDA Forest Service Research NoteSoutheastern Forest Experiment Station, Asheville Google Scholar. rates from slash pine, Plant Physiol. 65 () – [12] McReynolds RD: Heritability and seasonal changes in vis-cosity of slash pine oleoresin, USDA Forest Service Research Note SE ().

[13] McReynolds RD, Lane JM: Adapting the bubble-time method for measuring viscosity of slash pine oleoresin. Vancauwenberghe, Valérie Baiye Mfortaw Mbong, Victor Vanstreels, Els Verboven, Pieter Lammertyn, Jeroen and Nicolai, Bart 3D printing of plant tissue for innovative food manufacturing: Encapsulation of alive plant cells into pectin based bio-ink.

Journal of Cited by: 1. Oleoresins from Pine: Production and Industrial Uses may be inducible by ext ernal factors (secon dary resin), such as me chanical wounding, or biolog ical challenge, like insect or. The oleoresin-yielding abilities of slash pine trees selected for form and vigor from throughout the species' range were measured on grafted ramets by a microchipping technique.

Once developed, the approach calls for an additional stage of experimentation by introducing solids as well. 2 Apparatus and method Viscosity measurement The viscosity measurement involved measuring liquid viscosity at different temperatures, as described in Fig.

1, in order to provide practical viscosity ranges (viscosity â Cited by: Reinvigorating Oleoresin Collection in the Southeast USA: Evaluation of Chemical Inducers, Stand Management, Tree Characteristics, and Genetics Creator: Lauture, Jennifer Publisher: University of Florida Publication Date: oleoresin slash-pine.

Notes General Note. Nevertheless, as noted, Methods II and III had lower accuracies than Method I, varying from to for Method II and from to for Method III. The passive acoustic method, on the other hand, performed well in both, accuracy and repeatability, since its repeatability was % and its accuracy range between and Cited by: increased the lubricant viscosity; at high shear rate of s-1 onwards, the bubbly oil viscosity remains almost constant but is higher than the unaerated lubricant viscosity.

In addition, the bubbly oil viscosity also increased with vol% at low shear rate of 50s-1 due to the bubbles shape remaining unchanged and increasing the resistance of.

Built into membrane system, direct measuring method of integrity Not a continuous monitoring system 5 Bubble point testing Direct monitoring method for integrity Must be conducted manually, labour intensive for large plants 6 Sonic sensors Direct method, quick and easy to use Not continuous, labour intensive for large scales.

Figure (1). Chapter 4 METHODS OF BUBBLE MEASUREMENTS As the size distribution is the most important characteristics of the oceanic bubble population necessary to be measured, much effort was directed toward designing a reliable, simple, and wide-range bubble spectrometer.

Early Methods Early attempts to measure bubble population involved methods based onFile Size: 68KB. Oleoresin from more than 50 trees of each species was tested for composition and amount of monoterpenes and resin acids, viscosity, flow (rate, duration, and amount), and rate of crystallization.

Discriminant function analyses were used to classify the loblolly and shortleaf trees as to probable resistance. fluids Article The Influence of Bubbles on Foamed Cement Viscosity Using an Extended Stokesian Dynamics Approach Eilis Rosenbaum 1,*,†, Mehrdad Massoudi 1,2,† and Kaushik Dayal 3,4,† 1 National Energy Technology Laboratory, Cochrans Mill Road, P.O.

BoxPittsburgh, PAUSA; [email protected] by: 2. We have proposed a novel methodology using ultrasonic velocity profiling to estimate the effective viscosity of bubble suspensions that are accompanied by non-equilibrium bubble deformations in periodic shear flows. The methodology was termed “ultrasonic spinning rheometry” and validated on measurement of the effective viscosity of particle suspensions that has a semi-empirical formula Cited by: The feasibility of in situ measurement device for bubble size and distribution was explored.

A novel in situ probe measurement system, the EnviroCam™, was developed. Where possible, this probe incorporated strengths, and minimized weaknesses of historical and currently available real-time measurement methods for by: A method is described for measuring the sizes of bubbles in two- and three-phase systems.

The length and velocity of each bubble is measured by a pair of optical detectors in a brass block surrounding a capillary tube through which bubbles are drawn. This data is Cited by: The simulated relative viscosity data can be compared with some of the known experimental data.

The most comprehensive collection of the viscosity of foamed cement is contained in Al-Mashat’s thesis. However, Al-Mashat’s method for measuring the viscosity is Cited by: 2.

Chapter 2 BUBBLES AS PHYSICAL OBJECTS The bubble as a physical object has been observed and studied for centuries. Newt on observ ed t he f orm at ion of an ai r bub ble wh ile press ing liqui d bet wee n two len ses, but he did not realize at the time from where the bubble originates (Trevena, ).

INFLUENCE OF VISCOSITY GRADIENT ON BUBBLE FORMATION AT A SUBMERGED ORIFICE A Thesis Presented By Leily Majidi To The Department of Mechanical and Industrial Engineering In partial fulfillment of the requirements For the degree of Master of Science In the field of Mechanical Engineering Northeastern University Boston, MA August, Author: Leily Majidi.

On Testing for Speculative Bubbles 89 where bt+1 = Bt+1 – Et(Bt+1). According to the terminology adopted by Olivier Blanchard (), Robert Flood and Peter Garber (b) and Blanchard and Mark Watson (), Bt is a bubble in the equity price, and bt+1 is the innovation in the bubble at time t + 1 which has mean zero.Physiology of Tree Resistance to Insects Hanover, J W James W.

Hanover2 Department of Forestry, Michigan State University, East Lansing, Michigan The economic impact of insect damage to trees is so great that research efforts aimed at controlling insect pests are easily justified and research accomplishments are readily measured.

As a result of past research on many .One way to measure the viscosity of a fluid such as pine oleoresin is to measure the time it takes an air bubble to rise through the fluid for a fixed dis- tance at a given bubble-time method’ measures kinematic vis- cosity in method has been adopted for measuring viscosity of smallCited by: 3.