Influence Of Low-temperature Treatment Research Articles

A novel and effective approach to improve the oxidation resistance and slag corrosion resistance of Al2O3–SiC–C castables

The present study aims to clarify the role of ball pitch in Al2O3–SiC–C (ASC) refractory castables and investigate the influence of low temperature treatment on the composition, microstructural evolution, and properties of ASC refractory castables. By utilizing the expansion properties of ball pitch during heating, the castables undergo a low temperature treatment to induce the flow and expansion of ball pitch within the castables. This, in turn, fills the surrounding pores and enhances the physical properties of the castables. The results of this study demonstrate that low-temperature heat treatment of the castables at temperatures at 350 °C significantly improves the hot modulus of rupture, oxidation resistance, and slag resistance after sintering. This improvement is attributed to the optimized microstructure. In comparison to the corresponding samples without low temperature treatment, the high temperature modulus of rupture (HMOR) of the calcined castables treated at 350 °C increases by 33.3%. Additionally, the oxidation index and slag corrosion index after sintering at 1500 °C decrease by 39.6% and 87.31% respectively for the samples low temperature treated at 350 °C, as compared to the samples low temperature treated at 110 °C. This study provides a fresh perspective on the production of ASC castables with exceptional high temperature performance.

In Ukrainian

in Ukrainian

Low-temperature treatment of tobacco ovaries improves the isolation, viability, and embryogenic potential of two-celled proembryos

The influence of low-temperature treatment of ovaries on the isolation and subsequent culture of two-celled proembryo in vitro was explored in tobacco. The efficiency of isolation of two-celled proembryos was significantly improved, by an average of 23.47 % after treatment of ovaries at 4°C for 5–24 h. Cell viability and polarity of two-celled proembryos, as assessed by organelle distribution, growth pattern, and cell wall component distribution, were all well maintained after cold treatment. Furthermore, in vitro cultivated two-celled proembryos divided normally, with timing paralleling that of two-celled proembryos isolated from fresh ovaries. Unexpectedly, the division frequency of two-celled proembryos was significantly improved by cold treatment. These results demonstrate that low-temperature treatment of tobacco ovaries was beneficial for two-celled proembryo manipulation in vitro, by not only improving isolation efficiency but also by promoting cell division and improving the potential for further cultivation.

The Influence of Low Temperature Treatments on the H Solubility and the Curie Temperature of Fe-B Based Glasses

An additional cryogenic effect will be reported obtained on hypo-eutectic FeB alloys. After resting the samples at low temperature (such as liquid N2, 77 K), the decrease in H solubility was detected by measuring the time dependence of pressure change in a hermetically closed chamber. The cryogenic treatment also caused a systematic lowering of the Curie temperature of the amorphous phase (TCam), similarly to that, observed in other types of Fe-based glasses.

96/03551 Influence of low temperature treatment on lignite structure and its liquefaction behavior

96/03551 Influence of low temperature treatment on lignite structure and its liquefaction behavior

7. 玉蜀こしの耐冷性に関する研究 : 第3報 雌穂の低温遭遇について(談話会年次講演会講演要旨昭和36年度)

7. 玉蜀こしの耐冷性に関する研究 : 第3報 雌穂の低温遭遇について(談話会年次講演会講演要旨昭和36年度)

Tetraploid PMCs of Rhoeo induced by low temperature treatment

In the winter of 1937, pots of Rhoeo discolor Hance were transfered from the green house (23°C) to the place of 2°C for four hours and then were put back again. Two weeks after treatment, some anthers were found to contain a considerable number of tetraploid PMCs mixed among the normal diploid ones. The chromosome configurations were studied by one 'diakinesis' (Fig. 6) and nine MI (Figs. 2-4 and 7-15) PMCs. They involved univalents, ring bivalents, chains of three or more chromosomes, rings of 4 chromosomes and polyvalents bearing triple terminal chiasmata. They are all similar to those demonstrated by Seitz (1935) in tetraploid Oenothera species. These 4x-PMCs are ascribed to be due to the failure of cytokinesis at the last mitosis in the archesporial tissues which were affected by influence of low temperature treatments. The chromosome configurations observed favor the assumption that Rhoeo is an interchange heterozygote as has been hitherto inferred only from ring configurations.

Influence of Low Temperature Treatments on the Germination of Seeds of Sweet Clover and Smooth Vetch1

Agronomy JournalVolume 31, Issue 8 p. 687-694 Article Influence of Low Temperature Treatments on the Germination of Seeds of Sweet Clover and Smooth Vetch1 L. E. Dunn, L. E. Dunn Graduate student in Farm Crops, Oregon State Agr. College; now Research Assistant in Soils, State College of Washington, Pullman, Wash. The writer wishes to express his appreciation of the help of Prof. G. R. Hyslop of the Farm Crops Department for suggestions in planning and carrying out the studies and for reading and checking the manuscript.Search for more papers by this author L. E. Dunn, L. E. Dunn Graduate student in Farm Crops, Oregon State Agr. College; now Research Assistant in Soils, State College of Washington, Pullman, Wash. The writer wishes to express his appreciation of the help of Prof. G. R. Hyslop of the Farm Crops Department for suggestions in planning and carrying out the studies and for reading and checking the manuscript.Search for more papers by this author First published: 01 August 1939 https://doi.org/10.2134/agronj1939.00021962003100080004xCitations: 8 1 Published as Technical Paper No. 294 with the approval of the Director of the Oregon Experiment Station. Contribution of the Department of Farm Crops. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume31, Issue8August 1939Pages 687-694 RelatedInformation