Faculty Opinions recommendation of Temperature-dependent growth contributes to long-term cold sensing.

The thermal properties of closed-cell foam insulation display a more complex behaviour than other construction materials due to the properties of the blowing agent captured in their cellular structure. Over time, blowing agent diffuses out from and air into the cellular structure resulting in an increase in thermal conductivity, a process that is temperature dependent. Some blowing agents also condense at temperatures within the in-service range of the insulation, resulting in non-linear temperature dependent relationships. Moreover, diffusion of moisture into the cellular structure increases thermal conductivity. Standards exist to quantify the effect of gas diffusion on thermal conductivity, however only at standard laboratory conditions. In this paper a new test procedure is described that includes calculation methods to determine Temperature Dependent Long-Term Thermal Conductivity (LTTC(T)) functions for closed-cell foam insulation using as a test material, a Medium-Density Spray Polyurethane Foam (MDSPF). Tests results are provided to show the validity of the method and to investigate the effects of both conditioning and mean test temperature on change in thermal conductivity. In addition, testing was conducted to produce a moisture dependent thermal conductivity function. The resulting functions were used in hygrothermal simulations to assess the effect of foam aging, in-service temperature and moisture content on the performance of a typical wall assembly incorporating MDSPF located in four Canadian climate zones. Results show that after 1 year, mean thermal conductivity increased 15%–16% and after 5 years 23%–24%, depending on climate zone. Furthermore, the use of the LTTC(T) function to calculate the wall assembly U-value improved accuracy between 3% and 5%.

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Temperature-dependent growth and consumption of young-of-the-year sablefish Anoplopoma fimbria: Too hot, too cold or just right?

Fisheries Research ◽

10.1016/j.fishres.2018.09.005 ◽

2019 ◽

Vol 209 ◽

pp. 32-39 ◽

Cited By ~ 2

Author(s):

Joseph R. Krieger ◽

Ashwin Sreenivasan ◽

Ron Heintz

Keyword(s):

Temperature Dependent ◽

Anoplopoma Fimbria ◽

Young Of The Year ◽

Dependent Growth ◽

Just Right

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KEX2 mutations suppress RNA polymerase II mutants and alter the temperature range of yeast cell growth

Molecular and Cellular Biology ◽

10.1128/mcb.9.6.2341-2349.1989 ◽

1989 ◽

Vol 9 (6) ◽

pp. 2341-2349

Author(s):

C Martin ◽

R A Young

Keyword(s):

Rna Polymerase ◽

Rna Polymerase Ii ◽

Single Gene ◽

Yeast Cells ◽

Temperature Sensitive ◽

Temperature Dependent ◽

Growth Properties ◽

Cold Sensitive ◽

Dependent Growth ◽

Kex2 Protease

Suppressors of a temperature-sensitive RNA polymerase II mutation were isolated to identify proteins that interact with RNA polymerase II in yeast cells. Ten independently isolated extragenic mutations that suppressed the temperature-sensitive mutation rpb1-1 and produced a cold-sensitive phenotype were all found to be alleles of a single gene, SRB1. An SRB1 partial deletion mutant was further investigated and found to exhibit several pleiotropic phenotypes. These included suppression of numerous temperature-sensitive RNA polymerase II mutations, alteration of the temperature growth range of cells containing wild-type RNA polymerase, and sterility of cells of alpha mating type. The ability of SRB1 mutations to suppress the temperature-sensitive phenotype of RNA polymerase II mutants did not extend to other temperature-sensitive mutants investigated. Isolation of the SRB1 gene revealed that SRB1 is KEX2. These results indicate that the KEX2 protease, whose only known substrates are hormone precursors, can have an important influence on RNA polymerase II and the temperature-dependent growth properties of yeast cells.

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Pythium myriotylum is recovered most frequently from Pythium soft-rot infected ginger rhizomes in China

Plant Disease ◽

10.1094/pdis-05-21-0924-re ◽

2021 ◽

Author(s):

Paul Daly ◽

Yifan Chen ◽

Qimeng Zhang ◽

Hongli Zhu ◽

Jingjing Li ◽

...

Keyword(s):

Severe Disease ◽

Zingiber Officinale ◽

Soft Rot ◽

Temperature Dependent ◽

Pythium Myriotylum ◽

Disease Symptoms ◽

Ginger Rhizome ◽

Oomycete Pathogen ◽

Dependent Growth ◽

Pythium Soft Rot

Pythium soft rot is a major soil-borne disease of crops such as ginger (Zingiber officinale). Our objective was to identify which Pythium species were associated with Pythium soft-rot of ginger in China, where approximately 20% of global ginger production is from. Oomycetes infecting ginger rhizomes from seven provinces were investigated using two molecular markers, the internal transcribed spacer (ITS) and cytochrome c oxidase subunit II (CoxII). In total, 81 isolates were recovered and approximately 95% of the isolates were identified as Pythium myriotylum and the other isolates were identified as either P. aphanidermatum or P. graminicola. Notably, the P. myriotylum isolates from China did not contain the SNP in the CoxII sequence found previously in the P. myriotylum isolates infecting ginger in Australia. A subset of 36 of the isolates was analyzed repeatedly by temperature-dependent growth, severity of disease on ginger plants and aggressiveness of colonization of ginger rhizome sticks. In the pathogenicity assays, 32/36 of the isolates were able to significantly infect and cause severe disease symptoms on the ginger plants. A range of temperature-dependent growth, disease severity and aggressiveness in colonization was found with a significant moderate positive correlation between growth and aggressiveness of colonization of the ginger sticks. This study identified P. myriotylum as the major oomycete pathogen in China from infected ginger rhizomes and suggests that P. myriotylum should be a key target to control soft rot of ginger disease.

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Mechanism Investigation of Temperature Dependent Growth and Etching Process of GeCl4 on SiGe Surface: ab-initio Study

10.1109/sispad54002.2021.9592526 ◽

2021 ◽

Author(s):

Ji Young Park ◽

Gyeom Kim ◽

Jin Bum Kim ◽

Sang-Moon Lee ◽

Sae-jin Kim ◽

...

Keyword(s):

Ab Initio ◽

Etching Process ◽

Ab Initio Study ◽

Temperature Dependent ◽

Dependent Growth

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The geologic history of seawater oxygen isotopes from marine iron oxides

Science ◽

10.1126/science.aaw9247 ◽

2019 ◽

Vol 365 (6452) ◽

pp. 469-473 ◽

Cited By ~ 24

Author(s):

Nir Galili ◽

Aldo Shemesh ◽

Ruth Yam ◽

Irena Brailovsky ◽

Michal Sela-Adler ◽

...

Keyword(s):

Iron Oxide ◽

Oxygen Isotope ◽

Iron Oxides ◽

Isotope Composition ◽

Geologic History ◽

Temperature Dependent ◽

Oxygen Isotope Fractionation ◽

History Of ◽

Sediment Cover

The oxygen isotope composition (δ18O) of marine sedimentary rocks has increased by 10 to 15 per mil since Archean time. Interpretation of this trend is hindered by the dual control of temperature and fluid δ18O on the rocks’ isotopic composition. A new δ18O record in marine iron oxides covering the past ~2000 million years shows a similar secular rise. Iron oxide precipitation experiments reveal a weakly temperature-dependent iron oxide–water oxygen isotope fractionation, suggesting that increasing seawater δ18O over time was the primary cause of the long-term rise in δ18O values of marine precipitates. The18O enrichment may have been driven by an increase in terrestrial sediment cover, a change in the proportion of high- and low-temperature crustal alteration, or a combination of these and other factors.

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Temperature-dependent growth and hypericin biosynthesis in Hypericum perforatum

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2019.04.012 ◽

2019 ◽

Vol 139 ◽

pp. 613-619

Author(s):

Yuanyuan Yao ◽

Tianlan Kang ◽

Ling Jin ◽

Zihan Liu ◽

Zhen Zhang ◽

...

Keyword(s):

Hypericum Perforatum ◽

Temperature Dependent ◽

Dependent Growth

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Analysis of soft impingement in nonisothermal precipitation

Journal of Materials Research ◽

10.1557/jmr.2009.0434 ◽

2009 ◽

Vol 24 (12) ◽

pp. 3664-3673 ◽

Cited By ~ 8

Author(s):

Kai Fan ◽

Feng Liu ◽

Wei Yang ◽

Gencang Yang ◽

Yaohe Zhou

Keyword(s):

Three Dimensional ◽

Plain Carbon Steel ◽

Model Parameters ◽

Temperature Dependent ◽

Analytical Treatment ◽

Growth Coefficient ◽

Soft Impingement ◽

Compact Expression ◽

Nonisothermal Heating ◽

Dependent Growth

The effects of soft impingement on precipitation are considered. A physically realistic analytical treatment of soft impingement has been developed for solid-state precipitation in a nonisothermal heating/cooling process following the basic assumptions (i.e., a two-stage transformation including site saturation of nucleation, isotropic growth and linear approximation for a concentration gradient in front of the precipitate/matrix interface). Furthermore, both one- and three-dimensional precipitations have been described using a compact expression which is analogous to Zener’s model but with a temperature-dependent growth coefficient. A detailed description for the model parameters has been given for the model application. Good agreement with published experimental data, for example, the decomposition of austenite in a 0.038–0.30wt%Mn plain carbon steel, has been achieved.

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