scholarly journals DEVELOPMENT OF MODERNIZED GAS BURNER DEVICE OF SERIES GS-M FOR TUNNEL KILNS OF CERAMIC BRICK FIRING

2019 ◽  
pp. 66-69
Author(s):  
A.I. Torchinskij ◽  
S.K. Andreev
Keyword(s):  
Economic Performance ◽  
Low Temperatures ◽  
Ignition Temperature ◽  
Flame Length ◽  
Ceramic Brick ◽  
Working Space ◽  
Gas Ignition ◽  
Gas Burner ◽  
Firing Ceramic ◽  
The Stability

On the basis of gas-burning devices of the GS series, new devices have been developed, in which gas channels are installed for operation in the mode of maximum or minimum flame length. This allows to increase the stability of the flame at low temperatures of the working space (below the natural gas ignition temperature), which in turn provides an increase in the economic performance of the tunnel kiln firing ceramic bricks. Bibl. 5, Fig. 2.

FINANCIAL CRISES AND THE PUBLICATION OF THE FINANCIAL STATEMENTS OF BANKS IN SPAIN, 1844–1868

2004 ◽  
Vol 31 (2) ◽  
pp. 1-26 ◽  
Author(s):  
Mercedes Bernal Lloréns
Keyword(s):  
19Th Century ◽  
Financial Reporting ◽  
Economic Performance ◽  
Financial Crises ◽  
Limited Liability ◽  
Financial Statements ◽  
Early Response ◽  
Banking Regulations ◽  
The Stability ◽  
The Relationship

Financial crises have had a decisive influence on banking regulations in Spain. During the mid-19th century the publication of the financial statements of banks was considered key to the stability of the financial system. All new joint stock banking companies were to publish their statements in the Madrid Gazette in return for the privilege of limited liability. Similar obligations were placed on issuing banks. The copious publication of financial statements coincided with a period of financial prosperity. However, the crises that followed from 1864 to 1868 led to a reduction in the official publication of statements. This paper is concerned with an early response to crises in financial reporting. The study focuses on the relationship between the publication of accounting statements by banks and the GDP in Spain during the mid-19th century. The results suggest that the frequency of publication of financial statements may be an indicator of economic performance.

scholarly journals An experimental study on the effects of swirling oxidizer flow and diameter of fuel nozzle on behaviour and light emittance of propane-oxygen non-premixed flame

2017 ◽  
Vol 21 (3) ◽  
pp. 1453-1462 ◽  
Author(s):  
Alireza Javareshkian ◽  
Sadegh Tabejamaat ◽  
Soroush Sarrafan-Sadeghi ◽  
Mohammadreza Baigmohammadi
Keyword(s):  
Reynolds Numbers ◽  
Flame Length ◽  
Nozzle Diameter ◽  
Fuel Flow ◽  
Maximum Value ◽  
Fuel Nozzle ◽  
Flame Shape ◽  
The Stability ◽  
Blue Flame

In this study, the stability and the light emittance of non-premixed propane-oxygen flames have been experimentally evaluated with respect to swirling oxidizer flow and variations in fuel nozzle diameter. Hence, three types of the vanes with the swirl angles of 30?, 45?, and 60? have been chosen for producing the desired swirling flows. The main aims of this study are to determine the flame behaviour, light emittance, and also considering the effect of variation in fuel nozzle diameter on combustion phenomena such as flame length, flame shape, and soot free length parameter. The investigation into the flame phenomenology was comprised of variations of the oxidizer and fuel flow velocities (respective Reynolds numbers) and the fuel nozzle diameter. The results showed that the swirl effect could change the flame luminosity and this way could reduce or increase the maximum value of the flame light emittance in the combustion zone. Therefore, investigation into the flame light emittance can give a good clue for studying the mixing quality of reactants, the flame phenomenology (blue flame or sooty flame, localized extinction), and the combustion intensity in non-premixed flames.

scholarly journals The Stability of Icosahedral Cd-Yb

2003 ◽  
Vol 805 ◽  
Author(s):  
Günter Krauss ◽  
Sofia Deloudi ◽  
Andrea Steiner ◽  
Walter Steurer ◽  
Amy R. Ross ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ambient Temperature ◽  
Mechanical Stress ◽  
Single Crystals ◽  
High Temperatures ◽  
Low Temperatures ◽  
Ambient Pressure ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Stability

ABSTRACTThe stability of single-crystalline icosahedral Cd-Yb was investigated using X-ray diffraction methods in the temperature range 20 K ≤ T ≤ 900 K at ambient pressure and from ambient temperature to 873 K at about 9 GPa. Single-crystals remain stable at low temperatures and in the investigated HP-HT-regime. At high temperatures and ambient pressure, the quasicrystal decomposes. The application of mechanical stress at low temperatures yields to the same decomposition, the formation of Cd. A reaction of icosahedral Cd-Yb with traces of oxygen or water causing the decomposition seems reasonable, but a low-temperature instability of this binary quasi-crystal cannot be ruled out totally.

Decreased storage stability of creatine kinase in a cardiac reperfusion solution

1990 ◽  
Vol 36 (5) ◽  
pp. 778-780 ◽  
Author(s):  
G Dunphy ◽  
D Ely
Keyword(s):  
Creatine Kinase ◽  
Low Temperatures ◽  
Storage Stability ◽  
Frozen Storage ◽  
Cellular Damage ◽  
Prolonged Storage ◽  
Cold Preservation ◽  
Rat Hearts ◽  
The Stability ◽  
Storage Temperatures

Abstract Creatine kinase (CK; EC 2.7.3.2) has been used as an indicator of myocardial cellular damage. In this study we used a Krebs-Henseleit (KH) solution to reperfuse isolated rat hearts after 24 h of cold preservation and collected the KH reperfusate for assay of CK to assess cellular damage. We wanted to determine the stability of CK in the KH solution at different cold-storage temperatures and albumin concentrations. CK activity (mean +/- SEM) after one week of refrigeration (5 degrees C) was 93% +/- 1% of control values, whereas CK activity in nitrogen-frozen (-200 degrees C) samples was only 1.6% +/- 1% of control values, and that in samples frozen at moderately low temperatures (-10 degrees C) was 63% +/- 1% of control values. To enhance stability, we added albumin at several concentrations (49, 25, 12, and 6 g/L) to reperfusion collections in which CK had been previously determined. Specimens were frozen (-10 degrees C), then re-analyzed for CK weekly for three weeks. CK activity was maintained (100% +/- 5%) only in samples containing 25 g/L or more albumin. These data suggest that refrigeration (5 degrees C) for one week maintains normal CK activity in KH solution; however, if prolonged storage is necessary, a stabilizer such as albumin (greater than or equal to 25 g/L) will maintain analyte stability in frozen storage (-10 degrees C) for at least three weeks.

scholarly journals COMBUSTION PERFORMANCE OF SYNGAS FROM PALM KERNEL SHELL IN A GAS BURNER

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Asmadib Yusoff @ Adnan ◽  
Muhammad Roslan Rahim ◽  
Mohammad Nazri Mohd. Jaafar ◽  
Norazila Othman ◽  
Mohd Shuisma Mohd Ismail ◽  
...  
Keyword(s):  
Alternative Energy ◽  
Energy Content ◽  
Palm Kernel ◽  
High Energy ◽  
Flame Length ◽  
Palm Kernel Shell ◽  
Downdraft Gasifier ◽  
Combustion Performance ◽  
Rich Condition ◽  
Gas Burner

Insufficient and various environmental issues of fossil fuels as the current world dominated energy is now becoming a serious global issue. The rapidly increasing demand for alternative energy sources has contributed to the steady growth of renewable energy. Owing to the fact of the abundant presence of palm kernel shell (PKS) as one of palm biomass wastes in South East Asia region, this paper investigates syngas produced from gasified PKS. The investigation is regarding its composition and combustion performance in a gas burner system. It covers emissions analysis, temperature profile and flame length. The produced syngas from downdraft gasifier was burned in the combustion chamber in air-rich and fuel-rich combustion conditions.  From the experiment, the results showed that the oxidation zone temperature of above 750°C for the downdraft gasifier is suitable for producing syngas. Produced syngas can be classified as pure-carbon monoxide (CO) syngas due to 94.9% CO content with no hydrogen (H2) content and low heating value (LHV) of 10.7 MJ/kg. The wall temperature profiles for burnt syngas produced via downdraft gasification was higher with longer pattern at fuel-rich condition, which signified higher energy of syngas produced from downdraft gasifier compared to fluidised bed gasifier.  The associated flame length was also longer at fuel-rich condition. Produced emission of 56 ppm NOX, 37 ppm CO and 1 ppm SO2 can still be considered as acceptable to human.  It can be concluded that syngas produced from PKS shown a high potential to serve as an alternative source of energy due to its high energy content.

Carbonatitic melts in cuboid diamonds from Udachnaya kimberlite pipe (Yakutia): evidence from vibrational spectroscopy

2004 ◽  
Vol 68 (1) ◽  
pp. 61-73 ◽  
Author(s):  
D. A. Zedgenizov ◽  
H. Kagi ◽  
V. S. Shatsky ◽  
N. V. Sobolev
Keyword(s):  
Vibrational Spectroscopy ◽  
Low Temperatures ◽  
Kimberlite Pipe ◽  
Silica Content ◽  
Silicate Glasses ◽  
Stability Field ◽  
The Stability ◽  
Reported Data ◽  
Internal Pressures ◽  
High Internal Pressure

AbstractMicro-inclusions (1 –10 μm) in 55 diamonds of cubic habit from the Udachnaya kimberlite pipe have been studied using vibrational spectroscopy. This has revealed a multiphase assemblage in cuboid diamonds from the Udachnaya kimberlite pipe. This assemblage includes carbonates, olivine, apatite, graphite, water and silicate glasses. The micro-inclusions preserve the high internal pressure and give confidence that the original materials were trapped during growth of the host diamond. The internal pressures, extrapolated to mantle temperatures, lie within the stability field of diamond and the relatively low temperatures are typical for the formation of cuboid diamonds. In contrast to previously reported data for African diamonds, the micro-inclusions in the cuboids from Udachnaya are extremely carbonatitic in composition (H2O/(H2O+CO2) ≈5 –20%) with the observed assemblage of microinclusions similar to some types of carbonatites. The low water and silica content testify that the material in the micro-inclusions of the Udachnaya diamonds was near-solidus carbonatitic melt. Vibrational spectroscopy has provided the evidence of carbonatitic melts in cuboid diamonds.

scholarly journals MAGNETIC AVALANCHES IN MOLECULAR NANOMAGNETS

2011 ◽  
Vol 25 (22) ◽  
pp. 1795-1807 ◽  
Author(s):  
S. McHUGH ◽  
M. P. SARACHIK
Keyword(s):  
Magnetic Field ◽  
Magnetic Moment ◽  
Low Temperatures ◽  
Quantum Tunneling ◽  
Ignition Temperature ◽  
Molecular Magnet ◽  
Molecular Nanomagnets ◽  
Subsonic Speed ◽  
Spin Reversal ◽  
Speed Of Propagation

The magnetization of the prototypical molecular magnet Mn 12-acetate exhibits a series of sharp steps at low temperatures due to quantum tunneling at specific resonant values of magnetic field applied along the easy c-axis. An abrupt reversal of the magnetic moment of such a crystal can also occur as an avalanche, where the spin reversal proceeds along a "deflagration" front that travels through the sample at subsonic speed. In this article, we review experimental results that have been obtained for the ignition temperature and the speed of propagation of magnetic avalanches in molecular nanomagnets. Fits of the data with the theory of magnetic deflagration yield overall qualitative agreement. However, numerical discrepancies indicate that our understanding of these avalanches is incomplete.

Design and Implementation of the Control Device for a Cable-Driven Camera Robot

2013 ◽  
Vol 373-375 ◽  
pp. 225-230
Author(s):  
Long Wang ◽  
Ying Sheng ◽  
Yuan Ying Qiu ◽  
Guang Da Chen
Keyword(s):  
Bearing Capacity ◽  
Control Device ◽  
Robot Motion ◽  
Compact Structure ◽  
Kinematics Model ◽  
Design And Implementation ◽  
Working Space ◽  
Motion State ◽  
Implementation Method ◽  
The Stability

Due to the advantages of strong bearing capacity, compact structure and large working space, cable-driven camera robots are being used increasingly. This paper focuses on the design and implementation method of the control device for a four-cable-driven camera robot. Firstly, a kinematics model is built and the variations of the cable lengths are analyzed along with the camera robot motion; then, the console and actuator of the camera robot are designed; again, PC software transferring command codes from the camera robot console to the actuator and displaying camera robot motion state is developed; finally, the stability and rationality of the control device are verified by the experiment.

The Effect of Temperature on the Interaction of Phenanthroline-based Ligands with G-quadruplex: In Silico Viewpoint

2019 ◽  
Vol 22 (8) ◽  
pp. 546-554
Author(s):  
Mohadeseh Bazoobandi ◽  
Mohammad R. Bozorgmehr ◽  
Ali Mahmoudi ◽  
Ali Morsali
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Low Temperatures ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Effect Of Temperature ◽  
Quadruplex Structure ◽  
G Quadruplex ◽  
The Stability ◽  
Increasing Temperature

Aim and Objective: The stability of the G-quadruplex structure can increase its activity in telomerase inhibiting cancer cells. In this study, a molecular dynamics simulation method was used to study the effect of three phenanthroline-based ligands on the structure of G-quadruplex at the temperatures of 20, 40, 60 and 80°C. Materials and Methods: RMSD values and frequency of calculated RMSD in the presence and absence of ligands show that ligands cause the relative stability of the G-quadruplex, particularly at low temperatures. The calculation of hydrogen bonds in Guanine-tetrads in three different quadruplex sheets shows that the effect of ligands on the sheets is not the same so that the bottom sheet of G-quadruplex is most affected by the ligands at high temperatures, and the Guaninetetrads in this sheet are far away. Conformation factor was calculated as a measure of ligands binding affinity for each of the G-quadruplex residues. Results: The results show that the studied ligands interact more with the G-quadruplex than loop areas, although with increasing temperature, the binding area also includes the G-quadruplex sheets. The contribution of each of the residues involved in the G-quadruplex binding area with ligands was also calculated. Conclusion: The calculations performed are consistent with the previous experimental observations that can help to understand the molecular mechanism of the interaction of phenanthroline and its derivatives with quadruplex.

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