Facilitated, "cooperative" binding of GAILA-AH to nucleosomal DNA occurred in response to inhibition from the core histone amino termini. The binding of GAL4-AH (which contains the DNA-binding and dimerization domains of GALA) to (5,15,34,43,64) and is affected in vivo by the stability of nucleosomes located over core promoter sequences (50) and mutations in the N termini of histone H4 (17).Before upstream activators can act on core promoters, they must first gain access to their respective upstream binding elements (reviewed in reference 1). Studies thus far implicate at least three criteria which govern the ability of factors to access their binding sites on nucleosomes. The first is an inherent difference in the ability of factors to bind nucleosomal DNA, perhaps dictated by their particular DNA-binding motifs. Those found to bind at least in some instances include TFIIIA, the glucocorticoid receptor, and GAL4 derivatives, while those unable to bind in similar circumstances include nuclear factor 1 and the human heat shock factor (2,31,42,44,45,52,62). Second, nucleosome positioning has been implicated in determining factor access.
To study the fluidity and sprayability characteristics of sulfur powder, powder comprehensive characteristic tester was utilized. The results show that the fluidity was in not good level and prone to be sprayable. With the moisture content less than 1.2%, the fluidity property was also in not good level, and continuous increase in the moisture content or the charge-to-mass ratio tended to trigger off bad or even worse fluidity. When the moisture content of the wet basis was less than 0.7%, the sulfur powder was prone to spray. Raising the moisture content from 0.7% to 1.5%, or increasing the charge-to-mass ratio from -6.9 to -11.4 nC∙g-1 also led to may be sprayable tendency, while a further increase in one of the two parameters no sprayable tendency. It can be concluded that in the chemical industry, special treatment is needed for sulfur production equipment to improve its fluidity and sprayability.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.