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Online since: April 2016
Authors: Janka Janštová, Soňa Gavurniková, Michaela Havrlentová, Tatiana Klempová, Milan Čertík
The content of GLA (Fig.1D) varied from 3.9 mg/g (wheat “Color” grains) to 5.3 mg/g of biomaterial (wheat “Color” brans).
Analysis of fermented cereals; A – content of total starch (%), B – content of resistant starch, C – content of dietary fiber, D – content of gamma-linolenic acid (GLA) in ■/□ raw/fermented cereal material; WCB – wheat “Color” brans, WCF – wheat “Color” grains, WIB – wheat “Ilona” brans, WIG – wheat “Ilona” grains, WSH – wheat “Spelt” husks Farinographical properties of flour/dough.
During the process of fungal fermentation gluten proteins in wheat grains are degraded and after fermentation it is not even possible to determine the gluten content.
Farinographic properties A- ■dough development time (DDT), □dough stability (DS); B – farinographic quality number; of basic flour (BF) and flour with addition of 10% of fermented biomaterial; WCB – wheat “Color” brans, WCF – wheat “Color” grains, WIB – wheat “Ilona” brans, WIG – wheat “Ilona” grains, WSH – wheat “Spelt” husks Properties of flour/breads.
Cordain, Cereal grains: humanity’s double-edged sword, World Rev.
Online since: May 2009
Authors: Helen R. Watling, Alexander D. Elliot, Felicity A. Perrot, Denis W. Shiers
Accessibility of Energy Substrates to Bacteria Modern SEM-based techniques of inferring mineralogy (from elemental compositions) at the grain scale provide informative images and enable the estimation of 'liberation' for target minerals in larger particles.
On the other hand, exposed sulfide grains would likely become sites of prolific microbial growth and, if those sulfides were reactive, corrosion pits into the particle would develop for as long as they provided a microcosm conducive to bacterial growth.
The channels thus created open the way for acid and ferric ion leaching of both gangue and sulfide grains to continue in localised environments within the particle.
Figure 1. 2D Particle mineral map of the distribution of sulfide grains within a gangue mineral matrix.
(2) Pyrrhotite grains distributed in the silicate matrix, often associated with chlorite and pentlandite grains (3) Chalcopyrite and pentlandite grains encapsulated in the unreactive silicate matrix (4) Pentlandite grains associated with chlorite Numbers of pyrrhotite, chalcopyrite and pentlandite grains also occur on the surface of the particle.
Online since: March 2007
Authors: Shanmukha Nagaraj, M. Krishna
The grain boundaries can be seen to be compressed.
The grains are distinguishable from one another.
The thickness of the grain boundaries has reduced considerably.
The grain boundaries cannot be distinguished very easily.
The number of layers increases with increase in percentage of expansion. 7.
Online since: November 2010
Authors: Zhong Hua Tang
Finally, measure the grain size of aluminum hydroxide by equipments such as laser granulometer. 3.
Polyacrylamide contains large number of acylaminos, which could react with one or several hydroxyl radicals of Al(OH)3 and surround the crystal grain of aluminum hydroxide by hydrogen bonds, and block the collision agglomeration of particles by the stabilization of steric hindrance, as is shown in Figure 1.
Fig. 1 Schematic diagram of stabilization by steric hindrance of polyacrylamide to aluminum hydroxide crystal grain 4.
The effects of additive amount of polyacrylamide on grain size of aluminum hydroxide are shown in Table 2.
Too low NaAlO2 concentration would decrease the production efficiency; too high concentration would lead to that polyacrylamide fails to effectively cover the Al(OH)3 crystal grains and, as a result, the crystal nucleus grows rapidly, the grain size of the Al(OH)3 crystal grain increases, and the agglomeration of particles become remarkable.
Online since: August 2007
Authors: Toyohiko Yano, Masamitsu Imai, Thanakorn Wasanapiarnpong, Shigetaka Wada
Introduction Electrical industries have strongly desired an alternative material with high thermal conductivity for electrical-substrate applications, in order to deal with heat from an ever-increasing number of electrical devices.
The bending strength decreased after the second-step sintering due to the effect of grain growth, which confirmed in Fig. 3.
High fracture toughness in comparison with other ceramic materials is connected with the toughening mechanism, which is similar to those in whisker-reinforced composite materials, i.e., grain bridging by elongated grains and pullout of its as confirmed an shown in Fig. 3.
The toughening mechanisms was described by presence of elongated grains and local stress between grains and intergranular glassy phase [13].
Intergranular glassy phases generally have thermal expansion coefficients higher than that of Si3N4 grains, then the grain-boundary phase is in under tensile stress at room temperature, i.e. specimen containing appropriate amount of grain-boundary phase shows tendency for higher fracture toughness.
Online since: October 2002
Authors: M.O. Lai, F. Zhang, L. Lu
Grain size at different milling stages was calculated.
However, if the mechanical properties of them were checked, it could be found that manganese possesses a very high hardness of 500 DPN (diamond pyramid number) comparing with that of Nb (130 DPN).
Evolution of Grain size During the MA process, the grain size of Ti and Al decreased rapidly with milling time.
During the same period, the grain size of Ti reaches 16 nm.
Grain size evolutions of Ti and Al during the mechanical alloying (nm) Milling time (hrs) Grain Size of Al STDEV Grain size ( nm) STDEV 0 492 72 289 73 1 199 31 200 16 5 60 12 56 6 7.5 43 3 63 4 10 39 8 16 10 3.3.
Online since: September 2013
Authors: Jian Gang Yang, Ying Ying Ma, Zhong Kai Zhang, Xun Hai Pan
Under this condition, the prospective spore number of seed koji has reached to 1.89×109 /g.
Elutriation: removing impurities attached to the surface of the rice grains, such as rice bran, dust and inclusions. 2.
When the transparent sense of a grain of rice disappears and become pure white, you can remove the indica rice, drain half an hour and steamed the rice. 3.
Count the spore number: use of hemacytometer count the spore number of seed koji [5].
The number of spores= N/80×4×106×n.
Online since: December 2014
Authors: Li Wang, Hong Zhou Lu, Wen Jun Wang, Hardy Mohrbacher, Bian Jian
In all subsequent steps grain coarsening can only be obstructed but further grain refinement can actually not be achieved.
Conventional 22MnB5 shows increasingly mixed grain size with large and small grains as the temperature increases.
In this respect the strong grain refining effect by Nb microalloying also contributes increasing the number of nucleation sites and thus promoting a more homogeneous distribution of phases (Fig. 12-c).
By implementing grain refinement (Fig. 6) a larger total grain boundary area will be created.
The major step of the metallurgical optimization approach focuses on grain refinement referring to the prior austenite grain size (PAGS).
Online since: October 2018
Authors: I.R. Kuzeev, E.A. Naumkin, S.A. Pankratiev, R.R. Tlyasheva
It was found out that the forced vibrations on resonance frequency contribute the increase of a number of vibrations, that leads to decrease of critical axial compression force value.
Fatigue testing detected significant influence of the third and fourth resonance frequencies on the number of cycles to destruction.
It is also shown that the greater the average value of grain size, the less the basic frequency of own vibrations of the material.
Sharp decrease of the number of cycles to destruction under impact of vibrations on frequency of 12463 Hz shows that for this material the site of breakdown is formed at the smallest level of the structure.
In such case destruction should be realized by plastic mechanism and fracture should be localized inside the grain, just as we can see in our studies.
Online since: December 2018
Authors: Hiroyuki Y. Yasuda, Yoshihiko Koyanagi, Hiroyuki Takabayashi
Ni-Cr binary alloys containing high amount of Cr with the body-centered cubic (bcc) structure precipitate the Cr-rich phase (alpha-Cr), forming the lamellae structure with the gamma phase with face-centered cubic (fcc) structure by the DP, also known as cellular precipitaion which proceeds from grain boundary to interior grain.
Solution treatment temperature was selected to control the gamma grain size in each alloy.
Each sample has the gamma grain size from 300 mm to 400 mm after the solution heat treatment.
The DP reaction starts from the grain boundary in the early stage and subsequently, DP region grows into grain interior in the middle stage.
where, N is the number of measurement, si is the interlamellar spacing.
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