scholarly journals ANALISIS RESISTANSI COIL KAWAT TEMBAGA TERHADAP PERUBAHAN SUHU SANGAT RENDAH SEBAGAI RANCANG DASAR PENGUKURAN SUHU RENDAH

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Riswanto Riswanto
Keyword(s):  
Low Temperature ◽  
Linear Response ◽  
Copper Wire ◽  
Temperature Changes ◽  
Effective Form ◽  
Wire Conductor ◽  
Value Determination ◽  
Index Value ◽  
Wire Resistance ◽  
Coil Shape

The resistance of a wire conductor depend of the wire material. Copper wire formed into a coil shape an effective form to produce a large resistance. Copper wire resistance influenced bytemperature about it. Coil of copper wire has a good response at low temperature changes produced by liquid nitrogen. This response is shown by the index value determination (R2 = 0.999) which is close to the value 1,that means changes in temperature approaching a linear response to changes in a voltage. The results can be used as a basis for the design of the low-temperature measurements cheaper

Magnetic aftereffect experiments at low temperature: Linear response and quantum noise

1995 ◽  
Vol 52 (5) ◽  
pp. 3466-3470 ◽  
Author(s):  
J-E. Wegrowe ◽  
R. Ballou ◽  
B. Barbara ◽  
A. Sulpice ◽  
V. S. Amaral ◽  
...  
Keyword(s):  
Low Temperature ◽  
Linear Response ◽  
Quantum Noise ◽  
Magnetic Aftereffect

scholarly journals Joint transcriptomic and metabolomic analysis reveals the mechanism of low-temperature tolerance in Hosta ventricosa

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259455
Author(s):  
QianQian Zhuang ◽  
Shaopeng Chen ◽  
ZhiXin Jua ◽  
Yue Yao
Keyword(s):  
Signal Transduction ◽  
Low Temperature ◽  
Temperature Tolerance ◽  
Differentially Expressed ◽  
Metabolomic Analysis ◽  
Temperature Changes ◽  
Low Temperature Tolerance ◽  
Content Ratio ◽  
Temperature Damage ◽  
Hosta Ventricosa

Hosta ventricosa is a robust ornamental perennial plant that can tolerate low temperatures, and which is widely used in urban landscaping design in Northeast China. However, the mechanism of cold-stress tolerance in this species is unclear. A combination of transcriptomic and metabolomic analysis was used to explore the mechanism of low-temperature tolerance in H. ventricosa. A total of 12 059 differentially expressed genes and 131 differentially expressed metabolites were obtained, which were mainly concentrated in the signal transduction and phenylpropanoid metabolic pathways. In the process of low-temperature signal transduction, possibly by transmitting Ca2+ inside and outside the cell through the ion channels on the three cell membranes of COLD, CNGCs and CRLK, H. ventricosa senses temperature changes and stimulates SCRM to combine with DREB through the MAPK signal pathway and Ca2+ signal sensors such as CBL, thus strengthening its low-temperature resistance. The pathways of phenylpropanoid and flavonoid metabolism represent the main mechanism of low-temperature tolerance in this species. The plant protects itself from low-temperature damage by increasing its content of genistein, scopolentin and scopolin. It is speculated that H. ventricosa can also adjust the content ratio of sinapyl alcohol and coniferyl alcohol and thereby alter the morphological structure of its cell walls and so increase its resistance to low temperatures.When subjected to low-temperature stress, H. ventricosa perceives temperature changes via COLD, CNGCs and CRLK, and protection from low-temperature damage is achieved by an increase in the levels of genistein, scopolentin and scopolin through the pathways of phenylpropanoid biosynthesis and flavonoid biosynthesis.

Temperature Dependent Characteristics of 1D Photonic Crystal with Defects

2012 ◽  
Vol 535-537 ◽  
pp. 1299-1303
Author(s):  
Hui Bo Wang ◽  
Kai Tong ◽  
Mei Ting Wang ◽  
Chao Cong Guo
Keyword(s):  
High Temperature ◽  
Photonic Crystal ◽  
Low Temperature ◽  
Linear Relationship ◽  
Temperature Characteristic ◽  
Central Wavelength ◽  
Temperature Changes ◽  
Icp Etching ◽  
Thermal Expansion Effect ◽  
Expansion Effect

When the temperature is changed, due to the influence of the thermal expansion effect and thermo-optic effect, the thickness and refractive index of each layer of medium of photonic crystal will be Varied. As shown by optical resonators theory, the drift amount of the wavelength has a linear relationship with the variation of temperature. The electron beam lithography technology (EBL) and induction coupling plasma(ICP) etching were used for making the PCs with 1550nm central wavelength. An experiment mode is constructed for analyzing temperature characteristic of one-dimensional PCs, and then PCs is experimented at low temperature and high temperature. It can be found by experiment that, as the temperature changes, the central wavelength of photonic crystal has a linear relationship with the temperature, the drift amount of central wavelength at the low temperature is 0.072nm/°C,the drift amount at the high temperature is 0.076nm/°C,and the 3dB bandwidth of transmission spectrum of photonic crystal has no significant change, the spectral shape is changed very little.

scholarly journals DOMAIN WALL RESISTIVITY BASED ON A LINEAR RESPONSE THEORY

2001 ◽  
Vol 15 (04) ◽  
pp. 321-371 ◽  
Author(s):  
GEN TATARA
Keyword(s):  
Low Temperature ◽  
Domain Wall ◽  
Linear Response ◽  
Quantum Coherence ◽  
Weak Localization ◽  
Linear Response Theory ◽  
Thin Wall ◽  
Response Theory ◽  
Classical Domain ◽  
Wall Interaction

The resistivity due to a domain wall in a ferromagnetic metal is calculated based on a linear response theory. The scattering by impurities is taken into account. The electron-wall interaction is derived from the exchange interaction between the conduction electron and the magnetization by use of a local gauge transformation in the spin space. This interaction is treated perturbatively to the second order. The classical (Boltzmann) contribution from the wall scattering turns out to be negligiblly small if the wall is thick compared with the fermi wavelength. In small contacts a large classical domain wall resistance is expected due to a thin wall trapped in the constriction. In the dirty case, where quantum coherence among electrons becomes important at low temperature, spin flip scattering caused by the wall results in dephasing and hence suppresses weak localization. Thus the quantum correction due to the wall can lead to a decrease of resistivity. This effect grows rapidly at low temperature where the wall becomes the dominant source of dephasing. Conductance change in the quantum region caused by the motion of the wall is also calculated.

scholarly journals Joint Transcriptomic and Metabolomic Analysis Reveals the Mechanism of Low Temperature Tolerance in Hosta Ventricosa

2021 ◽  
Author(s):  
QianQian Zhuang ◽  
Shaopeng Chen ◽  
ZhiXin Jua ◽  
Yao Yue
Keyword(s):  
Signal Transduction ◽  
Low Temperature ◽  
Low Temperatures ◽  
Temperature Tolerance ◽  
Differentially Expressed ◽  
Metabolomic Analysis ◽  
Temperature Changes ◽  
Low Temperature Tolerance ◽  
Temperature Damage ◽  
Hosta Ventricosa

Abstract Background: Hosta ventricosa is a robust ornamental perennial plant that can tolerate low temperatures, and which is widely used in urban landscaping design in Northeast China. However, the mechanism of cold stress tolerance in this species is unclear. Methods:This study used a combination of transcriptomic and metabolomic analysis to explore the mechanism of low temperature tolerance in H. ventricosa.Results: A total of 12 059 differentially expressed genes (DEGs) and 131 differentially expressed metabolites were obtained, which were mainly concentrated in the signal transduction and phenylpropanoid metabolic pathways. In the process of low temperature signal transduction, H. ventricosa is mainly through the ion channels on the three cell membranes of COLD, CNGCs and CRLK to transmit Ca2+ inside and outside the cell to sense temperature changes, and stimulate SCRM to combine with DREB through the MAPK signal pathway and Ca2+ signal sensors such as CBL. Strengthen the low temperature resistance of H. ventricosa. The pathways of phenylpropanoid and flavonoid metabolism represent the main mechanism of low temperature tolerance in this species. The plant protects itself from low temperature damage by increasing its content of genistein, scopolentin and scopolin. It is speculated that H. ventricosa can also adjust the content ratio of sinapyl alcohol and coniferyl alcohol and thereby alter the morphological structure of its cell walls and so increase its resistance to low temperatures.Conclusions: In H. ventricosa that is subjected to low temperature stress, temperature changes are perceived through COLD, CNGCs and CRLK, and protection from low temperature damage is achieved by an increase in the levels of genistein, scopolentin and scopolin through the pathways of phenylpropanoid biosynthesis and flavonoid biosynthesis.

scholarly journals A New Spore Precipitator with Polarized Dielectric Insulators for Physical Control of Tomato Powdery Mildew

2006 ◽  
Vol 96 (9) ◽  
pp. 967-974 ◽  
Author(s):  
Yoshinori Matsuda ◽  
Hiroki Ikeda ◽  
Nobuyuki Moriura ◽  
Norio Tanaka ◽  
Kunihiko Shimizu ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Copper Wire ◽  
Electrostatic Force ◽  
Oidium Neolycopersici ◽  
Powdery Mildew Fungus ◽  
Tomato Plants ◽  
Wire Conductor ◽  
Rapid Spread ◽  
Electrostatic Generator ◽  
Entire Experiment

In an attempt to physically protect greenhouse tomato plants from the powdery mildew fungus Oidium neolycopersici, we developed a new electrostatic spore precipitator in which a copper wire conductor is linked to an electrostatic generator and covered with a transparent acrylic cylinder (insulator). The conductor was negatively charged by the generator, and the electrostatic field created by the conductor was used to dielectrically polarize the insulator cylinder. The dielectrically polarized cylinder also produced an electrostatic force without a spark discharge. This force was directly proportional to the potential applied to the conductor and was used to attract conidia of the pathogen. The efficacy of this spore precipitator in protecting hydroponically cultured tomato plants from powdery mildew was evaluated in the greenhouse. The hydroponic culture troughs were covered with a cubic frame installed with the spore precipitator, and the disease progress on precipitator-guarded and unguarded seedlings was traced after the conidia were disseminated mechanically from inoculum on tomato plants. Seedlings in the guarded troughs remained uninfected during the entire experiment, in spite of rapid spread of the disease to all leaves of the unguarded seedlings.

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