Temperature-dependent growth mechanisms of CaF2 on Si(111)

2004 ◽  
Vol 22 (5) ◽  
pp. 2182-2187 ◽  
Author(s):  
C. R. Wang ◽  
B. H. Müller ◽  
E. Bugiel ◽  
K. R. Hofmann
Keyword(s):  
Growth Mechanisms ◽  
Temperature Dependent ◽  
Dependent Growth

Growth and Structure of Carbide Nanorods

1995 ◽  
Vol 410 ◽  
Author(s):  
Charles M. Lieber ◽  
Eric W. Wong ◽  
Hongjie Dai ◽  
Benjamin W. Maynor ◽  
Luke D. Burns
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Mechanism ◽  
Growth Direction ◽  
Future Research ◽  
Growth Mechanisms ◽  
Temperature Dependent ◽  
Research Directions ◽  
Solid Carbide ◽  
Future Research Directions ◽  
Dependent Growth

ABSTRACTRecent research on the growth and structure of carbide nanorods is reviewed. Carbide nanorods have been prepared by reacting carbon nanotubes with volatile transition metal and main group oxides and halides. Using this approach it has been possible to obtain solid carbide nanorods of TiC, SiC, NbC, Fe3C, and BCx having diameters between 2 and 30 nm and lengths up to 20 µm. Structural studies of single crystal TiC nanorods obtained through reactions of TiO with carbon nanotubes show that the nanorods grow along both [110] and [111] directions, and that the rods can exhibit either smooth or saw-tooth morphologies. Crystalline SiC nanorods have been produced from reactions of carbon nanotubes with SiO and Si-iodine reactants. The preferred growth direction of these nanorods is [111], although at low reaction temperatures rods with [100] growth axes are also observed. The growth mechanisms leading to these novel nanomaterials have also been addressed. Temperature dependent growth studies of TiC nanorods produced using a Ti-iodine reactant have provided definitive proof for a template or topotactic growth mechanism, and furthermore, have yielded new TiC nanotube materials. Investigations of the growth of SiC nanorods show that in some cases a catalytic mechanism may also be operable. Future research directions and applications of these new carbide nanorod materials are discussed.

scholarly journals Direct observation of epitaxial organic film growth: temperature-dependent growth mechanisms and metastability

2015 ◽  
Vol 17 (43) ◽  
pp. 29150-29160 ◽  
Author(s):  
Helder Marchetto ◽  
Thomas Schmidt ◽  
Ullrich Groh ◽  
Florian C. Maier ◽  
Pierre L. Lévesque ◽  
...  
Keyword(s):  
Direct Observation ◽  
Growth Temperature ◽  
Film Growth ◽  
Growth Dynamics ◽  
Organic Films ◽  
Growth Mechanisms ◽  
Organic Film ◽  
Temperature Dependent ◽  
Dependent Growth

Growth dynamics and structures of organic films, and hence their properties, strongly depend on temperature and substrate morphology, as shown for the example PTCDA on Ag(111).

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

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.

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

Plant Disease ◽  
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.

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

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

Temperature-dependent fatigue crack growth mechanisms of fuel cell membranes

2022 ◽  
Vol 154 ◽  
pp. 106554
Author(s):  
Shouwen Shi ◽  
Jiayao Li ◽  
Haiyan Li ◽  
Yihao Yao ◽  
Hailong Dai ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fuel Cell ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Cell Membranes ◽  
Growth Mechanisms ◽  
Temperature Dependent ◽  
Fuel Cell Membranes

Temperature-dependent growth and hypericin biosynthesis in Hypericum perforatum

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

Analysis of soft impingement in nonisothermal precipitation

2009 ◽  
Vol 24 (12) ◽  
pp. 3664-3673 ◽  
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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