scholarly journals Effect of Rapid Temperature Change on Anaerobic Digestion.

1993 ◽  
Vol 16 (12) ◽  
pp. 869-877
Author(s):  
Gi Cheol CHA ◽  
Tatsuya NOIKE
Keyword(s):  
Anaerobic Digestion ◽  
Temperature Change ◽  
Rapid Temperature

Presentation of Rapid Temperature Change Using Spatially Divided Hot and Cold Stimuli

2013 ◽  
Vol 25 (3) ◽  
pp. 497-505 ◽  
Author(s):  
Katsunari Sato ◽  
◽  
Takashi Maeno
Keyword(s):  
Temperature Change ◽  
Thermal Sensation ◽  
Spatial Summation ◽  
Single Stimulus ◽  
Experimental Results ◽  
Thermal Perception ◽  
Rapid Temperature ◽  
Temperature Sense ◽  
Thermal Stimuli

We propose a thermal display that presents a rapid temperature change using spatially divided hot and cold stimuli. The display exploits two characteristics of human thermal perception: spatial summation and the adapting temperature. Experimental results confirmed that users perceived separate individual thermal stimuli as a single stimulus because of spatial summation. Our thermal display successfully made the skin simultaneously more sensitive to both hot and cold stimuli by using spatially divided hot and cold stimuli, each of which separately adjusts the adapting temperature so that it enables users to perceive thermal sensation rapidly. The thermal display that we fabricated enabled users to perceive a different temperature sense by changing the temperature of hot and cold stimuli.

Double-Walled Reactor Tube with Molten Salt Thermal Storage for Solar Tubular Reformers

2005 ◽  
Vol 128 (2) ◽  
pp. 134-138 ◽  
Author(s):  
Tsuyoshi Hatamachi ◽  
Tatsuya Kodama ◽  
Yuki Isobe ◽  
Daisuke Nakano ◽  
Nobuyuki Gokon
Keyword(s):  
Composite Material ◽  
Molten Salt ◽  
Temperature Change ◽  
Chemical Reaction ◽  
Thermal Storage ◽  
Chemical Conversion ◽  
Stable Operation ◽  
Cooling Mode ◽  
Outer Annulus ◽  
Rapid Temperature

This paper proposes a novel-type of “double-walled” reactor tube with molten-salt thermal storage at high temperatures for use in solar tubular reformers. The prototype reactor tube is demonstrated on the heat-discharge and chemical reaction performances during cooling mode of the reactor tube at laboratory scale. The Na2CO3 composite material with MgO ceramics was filled into the outer annulus of the double-walled reactor tube while the Ru-based catalyst particles were filled into the inner tube. The heat discharge form the molten Na2CO3 circumvented the rapid temperature change of the catalyst bed, which resulted in the alleviation of decrease in chemical conversion during cooling mode of the reactor tube. The application of the new reactor tubes to solar tubular reformers is expected to help realize stable operation of the solar reforming process under fluctuating insolation during a cloud passage.

scholarly journals Viscometric and spectrophotometric measurements of hemoglobin S polymerization kinetics

Blood ◽  
1984 ◽  
Vol 63 (4) ◽  
pp. 897-903
Author(s):  
GD Wenger ◽  
SP Balcerzak
Keyword(s):  
Temperature Change ◽  
Concentration Dependence ◽  
Delay Time ◽  
Marked Decrease ◽  
Delay Period ◽  
Hemoglobin S ◽  
The Third ◽  
Rapid Temperature ◽  
Viscosity Changes ◽  
Measured Viscosity

The rates of polymerization and depolymerization of identical concentrated deoxygenated hemoglobin S (HbS) solutions following a rapid temperature change were examined by several methods. Two of these methods measured viscosity changes in either gently agitated (AGT) or nonagitated (NAGT) samples. The third method utilized a change in turbidity at 735 nm (SDT). By all three methods, a delay period, during which no observable change was detected, followed the temperature change. Gelation, as determined in nonagitated samples by a viscosity- based technique, occurred before or coincided with gelation as determined spectrophotometrically. The slope of the concentration dependence of the delay time is significantly decreased by agitation. Similar monitoring of the depolymerization reaction indicated the persistence of increased viscosity after observation of a marked decrease in turbidity.

Heating and quenching of fossils

1989 ◽  
Vol 4 ◽  
pp. 218-222
Author(s):  
John Pojeta ◽  
Marija Balanc
Keyword(s):  
Temperature Change ◽  
Small Species ◽  
Grinding Wheels ◽  
Running Water ◽  
Mechanical Preparation ◽  
Rapid Temperature ◽  
Gas Burner ◽  
Entire Specimen

Rapid temperature change can be used to free fossils from some types of rock. Using this method, rocks are alternately heated over a gas burner and quenched in cold running water. The method is especially useful for obtaining specimens of small species (5mm–7mm), but whole specimens up to 50mm long have been released from rock. Heating and quenching should be tried on those limestones that break through both fossils and matrix when the rock is struck with a hammer or broken with a rock splitter. In such limestones, it is often difficult and time consuming to remove specimens using needles and grinding wheels (Sohl, this volume, chapter 19). Many more specimens can be obtained for study more rapidly by heating and quenching such rocks than can be obtained by mechanical preparation. In most instances, only one side of a specimen is exposed when limestone is split mechanically, and the opposite side of the specimen adheres tightly to the remaining rock. In such cases, heating and quenching can free the entire specimen of all rock.

Double-Walled Reactor Tube With Molten Salt Thermal Storage for Solar Tubular Reformers

Solar Energy ◽  
2005 ◽  
Author(s):  
T. Hatamachi ◽  
T. Kodama ◽  
Y. Isobe ◽  
D. Nakano ◽  
N. Goukon
Keyword(s):  
Composite Material ◽  
Molten Salt ◽  
Temperature Change ◽  
Chemical Reaction ◽  
Thermal Storage ◽  
Chemical Conversion ◽  
Stable Operation ◽  
Cooling Mode ◽  
Outer Annulus ◽  
Rapid Temperature

This paper proposes a novel type of “double-walled” reactor tube with molten-salt thermal storage at high temperatures for use in solar tubular reformers. The prototype reactor tube is demonstrated on the heat-discharge and chemical reaction performances during cooling mode of the reactor tube at laboratory scale. The Na2CO3 composite material with MgO ceramics was filled into the outer annulus of the double-walled reactor tube while the Ru-based catalyst particles were filled into the inner tube. The heat discharge form the molten Na2CO3 circumvented the rapid temperature change of the catalyst bed, which resulted in the alleviation of decrease in chemical conversion during cooling mode of the reactor tube. The application of the new reactor tubes to solar tubular reformers is expected to help realize stable operation of the solar reforming process under fluctuating insolation during a cloud passage.

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