Rates of internal blackspot bruise development in potato tubers under conditions of elevated temperatures and gas pressures

1976 ◽  
Vol 53 (7) ◽  
pp. 235-245 ◽  
Author(s):  
R. B. Dwelle ◽  
G. F. Stallknecht
Keyword(s):  
Elevated Temperatures ◽  
Potato Tubers ◽  
Blackspot Bruise ◽  
Gas Pressures

X‐Ray Powder Diffraction Assembly for Studies at Elevated Temperatures and High Gas Pressures

1957 ◽  
Vol 28 (5) ◽  
pp. 342-344 ◽  
Author(s):  
Edward J. Goon ◽  
John T. Mason ◽  
Thomas R. P. Gibb
Keyword(s):  
Powder Diffraction ◽  
Elevated Temperatures ◽  
X Ray ◽  
Gas Pressures

Apparatus for Absorption Spectroscopy of Liquids under Gas Pressures up to 300 Atm at Temperatures up to 600°C

1966 ◽  
Vol 20 (5) ◽  
pp. 317-319 ◽  
Author(s):  
David W. James ◽  
G. Pedro Smith
Keyword(s):  
Absorption Spectra ◽  
Absorption Spectroscopy ◽  
Pressure Vessel ◽  
Elevated Temperatures ◽  
Absorption Cell ◽  
Liquid Sample ◽  
Liquid Systems ◽  
Wide Neck ◽  
Gas Pressures

A pressure vessel and furnace for measuring absorption spectra of liquid systems at elevated temperatures and pressures is described. At 600°C, the assembly will operate at 300 atm. This apparatus was designed for use with either the Cary model 11 or the Cary model 14H spectrophotometer. The liquid sample is held in a standard 1-cm square absorption cell with a wide neck attached.

scholarly journals Evaluation of Tendency to Blackspot Bruising and Enzymatic Discoloration of Potato Tubers

2017 ◽  
Vol 75 (1) ◽  
pp. 5-10
Author(s):  
Agnieszka Hara-Skrzypiec
Keyword(s):  
Biochemical Properties ◽  
Quality Traits ◽  
Rotating Drum ◽  
Potato Tubers ◽  
Cultivated Potato ◽  
Mechanical Impact ◽  
Blackspot Bruise ◽  
Enzymatic Discoloration ◽  
Bruise Susceptibility

Abstract Enzymatic discoloration of potato tubers initiated by mechanical impact bruising and the discoloration which appears after tuber cutting are crucial quality traits of the cultivated potato. The presented determination of blackspot bruise susceptibility includes evaluation of the trait with two impact methods - the rotating drum and the falling bolt. These two methods affect both the physical and the biochemical properties of tubers. Evaluation of the discoloration potential after tuber cutting (ED) is also discussed. Evaluating the discoloration potential of tubers is one of the most important points in determining potato quality.

scholarly journals Novel Closed-Cell Gas-Reaction Holder Allows Characterization of Behavior of Bimetallic Nanoparticles at Elevated Temperatures and Gas Pressures

2013 ◽  
Vol 19 (S2) ◽  
pp. 1474-1475 ◽  
Author(s):  
L.F. Allard ◽  
J.E. Wittig ◽  
M. Chi ◽  
K.L. More ◽  
W.C. Bigelow ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Bimetallic Nanoparticles ◽  
Closed Cell ◽  
Gas Pressures

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Blackspot bruise susceptibility of potato tubers during growth and storage determined by two different test methods

2002 ◽  
Vol 45 (2-4) ◽  
pp. 187-202 ◽  
Author(s):  
P. E. Lærke ◽  
J. Christiansen ◽  
M. N. Andersen ◽  
B. Veierskov
Keyword(s):  
Test Methods ◽  
Potato Tubers ◽  
Blackspot Bruise ◽  
Bruise Susceptibility ◽  
And Storage

Characterization of Ultrathin Membranes to Enable TEM Observation of Gas Reactions at High Pressures

2009 ◽  
Author(s):  
Tuncay Alan ◽  
Joao Gaspar ◽  
Oliver Paul ◽  
Henny W. Zandbergen ◽  
Fredrik Creemer ◽  
...  
Keyword(s):  
Gas Flow ◽  
Structural Changes ◽  
High Pressures ◽  
Elevated Temperatures ◽  
Mechanical Performance ◽  
Atomic Scale ◽  
Transmission Electron ◽  
Present Design ◽  
Transparent Windows ◽  
Gas Pressures

In-situ, atomic scale imaging of chemical reactions at high gas pressures and elevated temperatures is crucial to characterize structural changes in catalysts. To enable transmission electron microscopy (TEM) imaging in realistic environments, a MEMS device that confines the gas flow and reactions to a micromachined channel was developed. The device consists of two parts that were brought into contact to form a channel. At the central part of the structure there is a large square region containing several 10–15 nm thick membranes that act as electron transparent windows, hence, allowing TEM imaging. The present design was previously demonstrated to sustain 0.1 MPa pressure, yet, to accurately mimic industrial conditions, the device should survive gas pressures as high as 1 MPa. In this article, we study the mechanical performance of individual components using simulations and nanoscale bulge tests and determine the necessary modifications to improve device functionality.

Characterization of Rare-Earth Fluoride Anti-Stokes Phosphors by Scanning arid Transmission Electron Microscopy

1971 ◽  
Vol 29 ◽  
pp. 142-143
Author(s):  
N. M. P. Low ◽  
L. E. Brosselard
Keyword(s):  
Electron Microscopy ◽  
Rare Earth ◽  
Elevated Temperatures ◽  
Stoichiometric Composition ◽  
Rare Earth Ions ◽  
Crystalline Solid ◽  
Precipitation Process ◽  
Rare Earth Fluoride ◽  
Earth Fluoride ◽  
Rare Earth Fluorides

There has been considerable interest over the past several years in materials capable of converting infrared radiation to visible light by means of sequential excitation in two or more steps. Several rare-earth trifluorides (LaF3, YF3, GdF3, and LuF3) containing a small amount of other trivalent rare-earth ions (Yb3+ and Er3+, or Ho3+, or Tm3+) have been found to exhibit such phenomenon. The methods of preparation of these rare-earth fluorides in the crystalline solid form generally involve a co-precipitation process and a subsequent solid state reaction at elevated temperatures. This investigation was undertaken to examine the morphological features of both the precipitated and the thermally treated fluoride powders by both transmission and scanning electron microscopy.Rare-earth oxides of stoichiometric composition were dissolved in nitric acid and the mixed rare-earth fluoride was then coprecipitated out as fine granules by the addition of excess hydrofluoric acid. The precipitated rare-earth fluorides were washed with water, separated from the aqueous solution, and oven-dried.

Observations oh Nucleation and Growth of Voids in Nickel

1970 ◽  
Vol 28 ◽  
pp. 414-415
Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel
Keyword(s):  
High Purity ◽  
Growth Stage ◽  
Elevated Temperatures ◽  
Early Growth ◽  
Nucleation And Growth ◽  
Pure Nickel ◽  
Different Temperatures ◽  
Total Fluence ◽  
Neutron Exposure ◽  
Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

Voids in Irradiated Tungsten and Molybdenum

1969 ◽  
Vol 27 ◽  
pp. 190-191
Author(s):  
Robert C. Rau ◽  
Robert L. Ladd
Keyword(s):  
Melting Point ◽  
Fast Neutron ◽  
Neutron Irradiation ◽  
Elevated Temperatures ◽  
Irradiation Temperature ◽  
The Body ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Cubic Metals ◽  
Face Centered

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

Mechanical Properties and Dislocation Structure of Single Crystal Cdte Deformed in Compression at 300°C

1976 ◽  
Vol 34 ◽  
pp. 592-593
Author(s):  
Ernest L. Hall ◽  
J. B. Vander Sande
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Dislocation Structure ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Strain Curve ◽  
Optical Devices ◽  
Semiconductor Compound ◽  
Wide Range ◽  
Sample Orientation

The present paper describes research on the mechanical properties and related dislocation structure of CdTe, a II-VI semiconductor compound with a wide range of uses in electrical and optical devices. At room temperature CdTe exhibits little plasticity and at the same time relatively low strength and hardness. The mechanical behavior of CdTe was examined at elevated temperatures with the goal of understanding plastic flow in this material and eventually improving the room temperature properties. Several samples of single crystal CdTe of identical size and crystallographic orientation were deformed in compression at 300°C to various levels of total strain. A resolved shear stress vs. compressive glide strain curve (Figure la) was derived from the results of the tests and the knowledge of the sample orientation.

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