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Various temperatures

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Modeling of fracture in small punch tests for small- and large-scale yielding conditions at various temperatures

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For 25 1 C, ductile fracture is mainly controlled by plastic fl ow and hydrostatic stress with focus now being on the distribution of the void volume fraction at various stages of loading (Fig. In the early stages of the process the void volume fraction has its maximum on the symmetry axis at the apex of the bend, however, with a magnitude far from the failure threshold.

Determining the material model at elevated temperatures with different strain rates and simulating the warm forming process for Mg alloy AZ31B sheet

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The stress-strain curves of AZ31B alloy at various temperatures are plotted and formed the characteristic strip of the stress- strain curves, as shown in Fig. From the Ramberg-Osgood parameters also are used to form the stress-plastic strain curves with different strain rate to describe the hardening behavior of AZ31B alloy sheet, as shown in Fig.

Physics Doctoral Thesis Abstract: Synthesis and investigation of photocatalytic properties of BiMO (M = V, Ti, Sn) materials

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SEM image and HRTEM analysis of the samples annealed at various temperatures. Figure 3.6a-c demonstrates the FESEM images of the samples as-prepared and annealed at 325 o C and at 400 o C. UV-Vis (a) and plot of transformed KM function (b) of the BiVO 4 samples as-prepared and annealed at different temperatures.. UV-vis analysis of the samples annealed at various temperatures. Figure 3.7a shows the UV-Vis spectra of the samples as-prepared and annealed at the various temperatures.

Influences of Ru-doping on the Magnetic Properties of Ca0.85 Pr0.15 Mn1−x RuxO3

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(Color online) Hysteresis loop for x = 0.04 mea- sured at various temperatures above 90 K. The magnetic moments of the Mn ions may be governed by a locally anisotropic field generated from the FM clusters at temperatures below 102 K. However, at temperatures above 102 K, as the thermal energy is high enough to suppress the FM coupling, the magnetic moments of Mn ions would be governed by the external applied field.

Characterization of yeasts isolated from different sources as probiotics

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This test checks the ability of the isolates to grow in the acidic and basic environment by finding the growth of the organism at various pH. The growth of all the isolates was measured at 600nm (Basavaraju and Jamil, 2014. In this test, the selected yeast isolates were checked for its ability to withstand at various temperatures. The selected 12 yeast isolates were incubated at various temperatures, i.e and 45⁰C for 24-48 hours.

Hydrolysis of ammonia borane and hydrazine borane by poly(N -vinyl-2-pyrrolidone)-stabilized CoPd nanoparticles for chemical hydrogen storage

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PVP (3.0 mM) at various temperatures and 30 ◦ C) and b) mol H 2 /mol N 2 H 4 BH 3 versus time in the hydrolysis of 100 mM N 2 H 4 BH 3 catalyzed by CoPd @ PVP (2.5 mM) at various temperatures and 25 ◦ C).. The observed rate constants (k obs ) for hydrogen release from hydrolysis reactions of AB and HB were calculated from the linear parts of the plots given in Figure 6 and are shown in Tables 3 and 4, respectively..

Summary of PhD Thesis: Diffusional and electrical properties of oxide materials with fluorite structure

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The dopant concentration dependence of the vacancy-dopant association energy for YDC (a) and YSZ (b) at various temperatures.. Figure 3.4 shows that the vacancy-dopant association energy decrease with the increasing of dopant concentration. Y 3+ show that the presence of Y 3+ ions in the cation barrier blocks the vacancy migration due to the formation of R 4. The vacancy diffusion pro- cess occurs mainly pass the R 4.

Production, purification, and characterization of a thermo-alkali stable and metal-tolerant carboxymethylcellulase from newly isolated Bacillus methylotrophicus Y37

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The effect of temperature on the CMCase activity of the purified enzyme was examined at various temperatures ranging from 25 to 85 ◦ C at pH 7.0. Among the seven different temperatures tested, 45 ◦ C is the optimum. temperature for maximum enzyme activity. A closer look at Figure 5 shows that enzyme activity displays about 93% of its maximal activity at temperatures between 65 and 85 ◦ C..

Heat Transfer Handbook part 97

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The quantum size effect, reflecting the impact of the characteristic wavelength of the energy carrier (Tien and Chen, 1994), has been shown to affect both the thermal transport properties and the thermodynamic properties.. (1996) results for the effect of film thickness on the thermal conductivity of silicon at various temperatures are shown in Fig.

Luminescence properties of Mn4+-doped CaAl2 O4 as a red emitting phosphor for white LEDs

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X-ray patterns of Mn 4+ -doped CaAl 2 O 4 at various temperatures.. The XRD patterns of the CaAl 2 O 4 :Mn 4+ phosphors sintered at various temperatures from 1000 to 1250°C are shown in Fig. Most of the diffraction peaks from these samples matched well with the standard Joint Committee on Powder Diffraction Standards (JCPDS) Card No..

Critical behavior and magnetic entropy change in La0.7Ca0.3Mn0.9Zn0.1O3 perovskite manganite

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The exact determination of T C and critical exponents b , g , and d for La 0.7 Ca 0.3 Mn 0.9 Zn 0.1 O 3 can be based on magnetization versus the applied fi eld M(H) measured at various temperatures, known as magnetic isotherms.

Preparation and characteristics of LiF:Mg,Cu,Na,Si thermoluminescent material

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Glow curves of LiF(0.6 mol% Mg, 0.6 mol% Cu, 1.8 mol% NaSi) TL powder annealed in N 2 gas flow with a rate of 6 l/min at various temperatures.. annealing atmosphere may modify TL glow curve shape, and so annealing in inert atmospheres (helium (He) or nitrogen (N 2. On the contrary, authors [9, 10] have reported that no significant differences were found between glow curve shapes of TLD-100 chips annealed either in He, N 2 or in air.

Temperature Optimization for Bioethanol Production from Corn Cobs Using Mixed Yeast Strains

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The xylose concentrations for the temperatures and 40°C all dropped from mg mL −1 (20°C), 3.92 mg mL −1 (25°C), 5.80 mg mL −1 (30°C) and 15.01 mg mL −1 (40°C) respectively at time 50 h (Fig. 1: The concentration of sugars produced from corn cobs using both acid and enzymatic hydrolysis. The result of the bioethanol concentration at the various temperatures is shown in Fig. The highest concentration of bioethanol produced from both sugars was 11.99 mg mL −1 at 25°C.

Polymer

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However, there are various methods for the estimation of l hyd that cannot be dis- cussed here. As an average of these data and our data (based on various vapor sorption isotherms of Nafion and solutions of sulfuric and phosphoric acids at various temperatures), a useful estimation for the proton hydration at 20 1 C could be the following: B1 for RH o 0.1.

Partial purification and biochemical characterization of an extremely thermo- and pH-stable esterase with great substrate affinity

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The stability of the enzyme in acidic and neutral pHs and at high temperatures suggests its usefulness in industrial applications.. pH 7.0 pH 5.0. pH stability profiles of Geobacillus sp. For determining pH stability, the enzyme was incubated at 4 ◦ C (A) and 50 ◦ C (B) for 5 days.. The thermostability of Geobacillus sp. DF20 esterase was also determined by measuring the residual activity after incubation of the pure enzyme solution (in pH 7.0 elution buffer) at various temperatures (Figure 5).

Lecture Physical chemistry - States of Matter: Liquids and Solids

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Curve AC, which divides the liquid region from the gaseous region, represents the boiling points of the liquid for various. Curve AD, which divides the solid region from the gaseous region, represents the vapor pressures of the solid at various temperatures.. The temperature above which the liquid state of a substance no longer exists. The vapor pressure at the critical. Properties of Liquids. Surface Properties of Liquids. substance defines the intermolecular forces holding it together..

Experimental and theoretical investigation of the reaction between CO2 and carbon dioxide binding organic liquids

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Table 1 shows the observed pseudo-first–order reaction rate constants for the CO 2 /DBN/1-propanol system versus the weight-percent concentration of DBN at temperatures ranging from 288 K to 308 K. Observed pseudo-first–order rate constants for the CO 2 /DBN/1-propanol system at various temperatures..

Chapter 7: Batteries for Stationary Power Supply

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Figure 7.17 Float current versus float voltage of an aged OPzS battery at various temperatures referred to 100 Ah of nominal capacity.. Figure 7.18 Actual discharge capacity of lead-acid and nickel/cadmium batteries at different temperatures (nominal capacity referred to 20 8 C).. Figure 7.19 Alloy-dependent current increase during float charging.. The lead alloy used influences the float current (see Figure 7.19)..

ASM Metals HandBook P7

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Various attempts have been made to facilitate the use of CCT diagrams by including the effect of the dimension of the workpiece and cooling medium on the microstructure and hardness obtained. Shown in the upper part of the figure are the amount and type of microstructure. The lower part of the figure shows the hardness after hardening and tempering (T) at various temperatures.

Handbook of Machine Design P38

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TABLE 32.4 Recommended Oil Viscosity for Various Temperatures. TABLE 32.5 Oil Flow Rates vs. 32.4.4 Types of Chain Lubrication. 32.4.5 Chain Casings. [32.5] and [32.6], machine design textbooks, or manufacturers' literature.. 32.4.6 Specific Lubrication Recommendations. [32.5] and [32.6] or in manufacturers' literature.. [32.5] or manufac- turers' literature..