Effect of temperature variation on course of telomerization of propylene with methyl chloroacetate

1979 ◽  
Vol 28 (9) ◽  
pp. 1977-1980
Author(s):  
N. S. Ikonnikov ◽  
A. B. Terent'ev
Keyword(s):  
Temperature Variation ◽  
Effect Of Temperature ◽  
Methyl Chloroacetate

THE EFFECT OF TEMPERATURE VARIATION ON RESISTANCE VALUE IN ELECTRICITY CIRCUITS

2020 ◽  
Vol 4 (1) ◽  
pp. 27
Author(s):  
Ridwan Yusuf Lubis ◽  
Lailatul Husna Lubis ◽  
Miftahul Husnah
Keyword(s):  
Temperature Variation ◽  
Effect Of Temperature ◽  
Resistance Value

Exploring secondary interactions and the role of temperature in moisture-contaminated polymer networks through molecular simulations

Soft Matter ◽  
2021 ◽  
Vol 17 (10) ◽  
pp. 2942-2956
Author(s):  
Rishabh D. Guha ◽  
Ogheneovo Idolor ◽  
Katherine Berkowitz ◽  
Melissa Pasquinelli ◽  
Landon R. Grace
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Temperature Variation ◽  
Polymer Networks ◽  
Molecular Simulations ◽  
Effect Of Temperature ◽  
Secondary Interactions ◽  
Dynamics Simulations ◽  
Secondary Bonding

We investigated the effect of temperature variation on the secondary bonding interactions between absorbed moisture and epoxies with different morphologies using molecular dynamics simulations.

scholarly journals Persistent Effect of Temperature on GDP Identified from Lower Frequency Temperature Variability

2021 ◽  
Author(s):  
Bernardo Bastien-Olvera ◽  
Frances Moore
Keyword(s):  
Climate Change ◽  
Temperature Variation ◽  
Cost Benefit ◽  
Temperature Variability ◽  
Effect Of Temperature ◽  
Economic Sectors ◽  
Human Welfare ◽  
Economic Productivity ◽  
Economic Output ◽  
Frequency Temperature

Abstract It is well established that temperature variability affects a range of outcomes relevant to human welfare, including health (Gasparrini et al., 2017) emotion and mood (Baylis et al., 2018), and productivity across a number of economic sectors (Carleton & Hsiang, 2016; Dell et al., 2014). However, a critical and still unresolved empirical question is whether temperature variation has a long-lasting effect on economic productivity and, therefore, whether damages compound over time in response to long-lived changes in temperature expected with climate change. Several studies have identified a relationship between temperature and GDP (Burke et al., 2015; Dell et al., 2012; Kalkuhl & Wenz, 2020), but empirical evidence as to the persistence of these effects is still weak. This paper presents a novel approach to isolate the persistent component of temperature effects on output using lower frequency temperature variation. Using three different datasets we find that longer temperature anomalies affect GDP growth as much or more than short-lived anomalies, implying persistent and therefore cumulative effects of climate change on economic output. The population-weighted global effect of -0.8 pp per degree is sufficient to reduce per-capita income in 2100 by 44% under RCP6, approximately an order of magnitude larger than damages currently represented in cost-benefit integrated assessment models (Diaz & Moore, 2017).

Effect of Temperature Variation on FT-IR Spectrometer Stability

1997 ◽  
Vol 51 (1) ◽  
pp. 43-50 ◽  
Author(s):  
D. M. MacBride ◽  
C. G. Malone ◽  
J. P. Hebb ◽  
E. G. Cravalho
Keyword(s):  
Temperature Variation ◽  
Thermal Instability ◽  
Effect Of Temperature ◽  
Optical Bench ◽  
Infrared Source ◽  
Ft Ir ◽  
Purge Gas ◽  
Response Variation ◽  
Spectrometer Response ◽  
Gas Supply

The effect of temperature variation on Fourier transform infrared (FT-IR) spectrometer response stability is investigated for wavenumbers from 10,000 to 100 cm−1 with the use of a temperature measurement and data acquisition system on the spectrometer optical bench. Spectrometer response instability is correlated with local temperature variation for two FT-IR spectrometer systems, with the use of various infrared source, beamsplitter, and detector combinations. The data obtained show that detector responsivity variation and beamsplitter misalignment associated with thermal instability of the spectrometer optical bench are responsible for the observed response instability. Response variation of up to 4% per °C temperature variation is observed. Variations of the laboratory environment and spectrometer purge gas supply temperatures are shown to affect spectrometer thermal stability directly.

scholarly journals Pengaruh Temperatur, Konsentrasi Katalis Dan Rasio Molar Metanol-Minyak Terhadap Yield Biodisel Dari Minyak Goreng Bekas Melalui Proses Netralisasi-Transesterifikasi

METANA ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. 30
Author(s):  
Antonius Prihanto ◽  
T.A. Bambang Irawan
Keyword(s):  
Temperature Variation ◽  
Catalyst Concentration ◽  
Process Condition ◽  
Effect Of Temperature ◽  
Molar Ratio ◽  
Concentration Variation ◽  
Cooking Oil ◽  
Used Cooking Oil

Telah dilakukan penelitian tentang pembuatan biodisel dari minyak goreng bekas melalui proses netralisasi-transesterifikasi. Tujuan penelitian ini adalah untuk mengkaji pengaruh temperatur terhadap yield biodiesel, pengaruh konsentrasi katalis terhadap yield biodiesel dan pengaruh rasio molar methanol-minyak goreng bekas terhadap yield biodiesel melalui proses netralisasi dan transesterifikasi. Untuk mendapatkan kondisi proses transesterifikasi terbaik, maka dikaji pengaruh variasi suhu (30 oC, 40 oC, 50 oC, 60 oC, 70 oC), variasi konsentrasi katalis KOH (0,75 %, 1 %, 1,25 %, 1,5 %, 1,75 %) dan rasio molar metanol-minyak (6:1; 7:1; 8:1; 9:1; 10:1) terhadap yield biodiesel yang dihasilkan dari minyak goreng bekas. Hasil penelitian menunjukkan pada rasio 6 : 1, konsentrasi katalis KOH 1 % pada suhu 60 oC mengahasilkan yield biodiesel maksimal sebesar 87,3 %. Effect of Temperature, Catalyst Concentration and Methanol-Oil Molar Ratio Against Biodiesel Yield from Used Cooking Oil Through Neutralization Transesterification ProcessA research has been conducted on the making of biodiesel from used cooking oil through a neutralization-transesterification process. The purpose of this study was to examine the effect of temperature on biodiesel yield, the effect of catalyst concentration on biodiesel yield and the effect of molar ratio of methanol to used biodiesel yield through neutralization and transesterification process. To obtain the best transesterification process condition, the effect of temperature variation (30 oC, 40 oC, 50 oC, 60 oC, 70 oC), KOH catalyst concentration variation (0.75%, 1%, 1.25%, 1,5 %, 1.75%) and the molar ratio of methanol-oil (6: 1; 7: 1; 8: 1; 9: 1; 10: 1) to the yield of biodiesel produced from used cooking oil. The results showed at a ratio of 6: 1, the concentration of 1% KOH catalyst at 60 ° C resulted in a maximum biodiesel yield of 87.3%.

Temperature induced phase transition in fluorescence active zein nanoparticles

2021 ◽  
Vol 99 (1) ◽  
pp. 18-23
Author(s):  
Charlie Joe Croxford ◽  
Rajpreet Kaur ◽  
Kultar Singh ◽  
Mandeep Singh Bakshi
Keyword(s):  
Phase Transition ◽  
Temperature Variation ◽  
Room Temperature ◽  
Colloidal Stability ◽  
Precipitation Method ◽  
Effect Of Temperature ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Potential Use ◽  
Controlled Precipitation

Stable colloidal zein nanoparticles (NPs) were synthesized by using controlled precipitation method. They were made fluorescence active by incorporating a small amount of fluorescence quinolinium surfactant. The incorporation of fluorescence surfactant provided both the colloidal stability and the fluorescence ability to determine the phase transition in zein NPs under the effect of temperature variation. Maintaining colloidal stability under the effect of temperature variation is an essential aspect of zein NPs applicability as a source of vegetarian protein supplement in different food suspensions. Different techniques such as fluorescence, DLS size, zeta potential, and FTIR measurements were applied to determine the influence of temperature on the colloidal stability of zein NPs. Zein NPs undergo phase transition well above room temperature while maintaining their size in nanometer range, and the phase transition temperature decreased with the amount of zein used in the synthesis of zein NPs. The results highlighted the potential use of zein NPs as a vegetarian supplement protein in different food products.

A Generalized Model for Residual Stress Caused by Thermal Mismatch in Multilayer Structures

2011 ◽  
Vol 704-705 ◽  
pp. 1284-1290
Author(s):  
Yu Mei Bai ◽  
Ying Qiang Xu ◽  
Tao Zhang
Keyword(s):  
Residual Stress ◽  
Thermal Expansion ◽  
Temperature Variation ◽  
Analytical Model ◽  
Layer Structure ◽  
Engineering Application ◽  
Effect Of Temperature ◽  
Multilayer Structures ◽  
Coating System ◽  
Thermal Expansion Mismatch

An analytical model based on multilayer structure with thermal expansion mismatch caused by temperature gradients was established to predict the residual stress in the system. The solution obtained from the model is independent of the number of layers. Three simplified models: bi-layer structure, coating system and film system with great compatibility are developed considering different engineering application. And the bilayer structure is verified by Stoney’s equation under the same conditions. Tri-layer coating system ZrO2/ Al2O3/1Cr18Ni9Ti is established in order to research the effect of temperature variations on the residual stress between different layers. The results suggested the stress has obvious mutation in coating interface with different temperature variation. And the residual stress with different temperature variation in different layers is larger than that with identical temperature variation. Key words: multilayer structures; residual stress; analytical model; thermal expansion mismatch; temperature variation

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