scholarly journals Approximation of bruise spot volume in pears in plots against deformation parameters

2012 ◽  
Vol 49 (No. 2) ◽  
pp. 50-55 ◽  
Author(s):  
J. Blahovec ◽  
V. Mareš
Keyword(s):  
Room Temperature ◽  
Second Order ◽  
Integral Parameter ◽  
Volume Versus ◽  
Hysteresis Losses ◽  
Low Level ◽  
Deformation Parameters ◽  
Mathematical Approximation ◽  
Characteristic Values ◽  
Spot Volume

Pears of different varieties were compressed between two flat rigid plates in loading/unloading tests. The bruise spots appearing after room temperature incubation were analysed manually, and bruise spot volumes were determined. The main parts of the paper discuss mathematical approximation of total bruise volume versus two deformation parameters defined in previous papers: hysteresis losses and degree of elasticity. The polynomial of the second order was used for this purpose, but success of this method depends on including some part of not-bruising results in the analysis. Characteristic values of hysteresis losses and degree of elasticity were used to determine the bruise index, the integral parameter, that is suitable for classifying the tested varieties as to tissue susceptibility to low-level bruising. The variety susceptibility to bruising decreased in the following order: Elektra, Erika, Vonka, Lucasova, Dicolor, Dita, Omega, Jana, Lada, Astra, Bohemica, and Delta.

Hierarchical nanostructures self-assembled from δ-MnO2 ultrathin nanosheets and Mn3O4 octahedrons for efficient room-temperature HCHO oxidation

2021 ◽  
Author(s):  
Lifang Qi ◽  
Yao Le ◽  
Chao Wang ◽  
Rui Lei ◽  
Tian Wu
Keyword(s):  
Room Temperature ◽  
Hierarchical Nanostructures ◽  
Low Level ◽  
Ultrathin Nanosheets ◽  
Self Assembling ◽  
Formaldehyde Oxidation ◽  
Self Assembled

Self-assembling ultrathin active δ-MnO2 nanosheets and Mn3O4 octahedrons into hierarchical texture enhances room-temperature formaldehyde oxidation at a low-level of Pt.

La1.16Mo8O16: a hollandite-related compound with an incommensurate modulated structure

1992 ◽  
Vol 48 (2) ◽  
pp. 134-144 ◽  
Author(s):  
H. Leligny ◽  
P. Labbé ◽  
M. Ledésert ◽  
B. Raveau ◽  
C. Valdez ◽  
...  
Keyword(s):  
Related Compound ◽  
Room Temperature ◽  
Second Order ◽  
Related Structure ◽  
Modulated Structure ◽  
One Dimensional ◽  
Modulation Wave ◽  
Occupancy Probability ◽  
Edge Sharing Octahedra ◽  
Triangular Clusters

The hollandite-related structure La1.16Mo8O16, Mr = 1184.66, tetragonal, P^{I4}_{\kern3pt 1}, a = 9.983 (1), c = 2.8890 (5) Å, V = 287.9 Å3, Z = 1, Dx = 6.83 g cm−3, \lambda(Mo Kα) = 0.71069 Å, μ = 126 cm−1, F(0000) = 530, room temperature, R = 0.041 for 1145 unique reflections with I\geq3σ(I). At room temperature the compound exhibits a one-dimensional incommensurate modulated structure with a modulation wavevector q* = 0.608 (1)c*. Both a displacive modulation wave, acting on La, Mo and O atoms, and a modulation wave governing the occupancy probability of La sites inside the tunnels are involved in the crystal. Within the superspace group P^{I4}_{\kern3pt 1}, the final R values of main reflections (477) and first- and second-order satellite reflections (523 and 145) are 0.030, 0.050 and 0.133 respectively. The more spectacular modulation features are the occurrence of La—La pairs in the tunnels and the formation of Mo3 triangular clusters in the double chains of edge-sharing octahedra. Contrary to previous descriptions based upon rigid tunnels in structures of the hollandite type, the tunnels in the crystal studied are distorted in a periodic way along [001] (λ = 4.75 Å), giving rise to alternate contractions and expansions. The distortion of the double octahedral chains is considerable and probably created via the La—O(1) bonds by insertion of La atoms inside two adjacent tunnels.

Second-Order Susceptibility Terms in Orthoferrites at Room Temperature

1964 ◽  
Vol 135 (1A) ◽  
pp. A97-A101 ◽  
Author(s):  
G. Gorodetsky ◽  
D. Treves
Keyword(s):  
Room Temperature ◽  
Second Order ◽  
Order Susceptibility

scholarly journals The Effect of Fe Doping on the Magnetic and Magnetocaloric Properties of Mn5−xFexGe3

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Jeffrey Brock ◽  
Nathanael Bell-Pactat ◽  
Hong Cai ◽  
Timothy Dennison ◽  
Tucker Fox ◽  
...  
Keyword(s):  
Phase Transition ◽  
Order Phase Transition ◽  
Room Temperature ◽  
Entropy Change ◽  
Second Order ◽  
Ferromagnetic Transition ◽  
Fe Doping ◽  
First Order Phase Transition ◽  
Magnetocaloric Properties ◽  
First Order Phase

The magnetic and magnetocaloric properties of a series of minutely doped Mn5-xFexGe3 compounds that exhibit the D88-type hexagonal crystal structure at room temperature have been investigated. For all Fe concentrations, the alloys are ferromagnetic and undergo a second-order ferromagnetic-to-paramagnetic transition near room temperature. Although the small Fe doping had little effect on the ferromagnetic transition temperatures of the system, changes in the saturation magnetization and magnetic anisotropy were observed. For x≤0.15, all compounds exhibit nearly the same magnetic entropy change of ~7 J/kg K, for a field change of 50 kOe. However, the magnitude of the refrigerant capacities increased with Fe doping, with values up to 108.5 J/kg and 312 J/kg being observed for field changes of 20 kOe and 50 kOe, respectively. As second-order phase transition materials, the Mn5-xFexGe3 compounds are not subject to the various drawbacks associated with first-order phase transition materials yet exhibit favorable magnetocaloric effects.

scholarly journals STUDI KARAKTERISTIK MATERIAL STEM SEPEDA UNTUK PENGEMBANGAN PROTOTIPE STEM SEPEDA BERBASIS LIMBAH PISTON DENGAN VARIASI TEMPERATUR CETAKAN

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Cecep Suganda ◽  
Edi Sutoyo ◽  
Dwi Yuliaji
Keyword(s):  
Room Temperature ◽  
Hardness Test ◽  
Mold Temperature ◽  
Material Characteristic ◽  
Micro Structure ◽  
Average Hardness ◽  
Before And After ◽  
Characteristic Values ◽  
Hardness Values

<p>Bicycle stem is the link between handlebar (handlebar) with steerer tube (fork). Stem one of the bike parts to<br />note and Each type of bike is different for the size and specifications stemnya. This research aims to. Obtained<br />characterization of alumunium casting material as a material for making stem bikes with casting temperature of<br />700 ° C, and temperature variations of room temperature (30 ° C), 100 ° C, 150 ° C, 200 ° C, and characteristic<br />hardness values stem between piston waste material and stem. The piston waste is melted at the melting<br />furnace at a temperature of 700 ° C. then cast into the mold. After obtaining the specimen and then testing the<br />material characteristics include chemical composition, microstructure, and hardness. The result of the research<br />after casting with variation of the molded temperture has different material characteristic values, ie: chemical<br />composition which has no change before and after casting, the microt structure has little porous defect, and the<br />hardness value where the higher the mold temperature the lower the hardness . Conclusions of data processing<br />The highest value of piston recycled hardness is 93 HV when compared to the hardness of 61.2 HV stem bike<br />material, the hardness is more than enough and from the composition test there is a difference of Si 12%<br />composition. Result of micro structure at foundry with 4 variation still have defect of cast (porous and<br />shrinkage). the stam bike hardness test has an average hardness value of 64.2 HV whereas for the hardness<br />value of piston waste casting results show the hardness value of 91 HV with mold temperature 30 ° C, 93 HV<br />with mold temperture 100 ° C, 89 HV with mold temperature 150 ° C, 87 HV with mold temperature 200 ° C. The<br />higher the mold temperature, the lower the hardness of the material.</p>

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