scholarly journals The structure of ribonucleic acid. 3. The end groups, the general structure and the nature of the ‘core’

1952 ◽  
Vol 52 (4) ◽  
pp. 565-571 ◽  
Author(s):  
R. Markham ◽  
J. D. Smith
Keyword(s):  
Ribonucleic Acid ◽  
General Structure ◽  
The Core ◽  
End Groups

scholarly journals Nucleoside Triphosphates as Precursors of Ribonucleic Acid End Groups in a Mammalian System

1958 ◽  
Vol 233 (4) ◽  
pp. 954-963 ◽  
Author(s):  
Liselotte I. Hecht ◽  
Paul C. Zamecnik ◽  
Mary L. Stephenson ◽  
Jesse F. Scott
Keyword(s):  
Ribonucleic Acid ◽  
Nucleoside Triphosphates ◽  
End Groups ◽  
Mammalian System

Virtual assembly with physical information: a review

2015 ◽  
Vol 35 (3) ◽  
pp. 206-220 ◽  
Author(s):  
Keyan Liu ◽  
Xuyue Yin ◽  
Xiumin Fan ◽  
Qichang He
Keyword(s):  
General Structure ◽  
Virtual Assembly ◽  
Research Trend ◽  
Future Directions ◽  
Content Type ◽  
The Core ◽  
Core Elements ◽  
Comprehensive Survey ◽  
Key Issues ◽  
New Research

Purpose – The purpose of this paper is to give a comprehensive survey on the physics-based virtual assembly (PBVA) technology in a novel perspective, to analyze current drawbacks and propose several promising future directions. Design/methodology/approach – To provide a deep insight of PBVA, a discussion of the developing context of PBVA and a comparison against constraint-based virtual assembly (CBVA) is put forward. The core elements and general structure are analyzed based on typical PBVA systems. Some common key issues as well as common drawbacks are discussed, based on which the research trend and several promising future directions are proposed. Findings – Special attention is paid to new research progresses and new ideas concerning recent development as well as new typical systems of the technology. Advantages of PBVA over CBVA are investigated. Based on the analysis of typical PBVA systems and the evolution of PBVA, the core elements of the technology and the general structure of its implementation are identified. Then, current PBVA systems are summarized and classified. After that, key issues in the technology and current drawbacks are explored in detail. Finally, promising future directions are given, including both the further perfecting of the technology and the combination with other technologies. Originality/value – The PBVA technology is put into a detailed review and analysis in a novel way, providing a better insight of both the theory and the implementation of the technology.

Embedded Arm-Based Control System Design for Automatic Strapping Machines

2014 ◽  
Vol 687-691 ◽  
pp. 3153-3157
Author(s):  
Jiang Ping Huang ◽  
Zheng Dong Wang ◽  
Wen Ze Yu ◽  
Kai He ◽  
Ru Xu Du
Keyword(s):  
Control System ◽  
System Design ◽  
Control Method ◽  
General Structure ◽  
Control System Design ◽  
Electronic Components ◽  
Simple Operation ◽  
The Core ◽  
Arm Microprocessor ◽  
Working Performance

A design of an embedded ARM-based control system for automatic strapping machine is described. This control system uses embedded ARM microprocessor as the core processor, which consists of a STM32 ARM chip and other electronic components. It introduces the general structure, the control method and the implementation of the control system in this paper. The system has many advantages, such as simple and reasonable circuit, stable working performance, simple operation, etc.

scholarly journals The dissociation of σ-factor from ribonucleic acid polymerase

1977 ◽  
Vol 163 (1) ◽  
pp. 177-179 ◽  
Author(s):  
A M Campbell ◽  
P A Lowe
Keyword(s):  
Escherichia Coli ◽  
Rna Polymerase ◽  
Ribonucleic Acid ◽  
Sigma Factor ◽  
Association Constant ◽  
Absolute Concentration ◽  
The Core ◽  
Core Enzyme ◽  
Σ Factor ◽  
The Absolute

The sigma-factor of Escherichia coli RNA polymerase was shown to dissociate from the core enzyme as a function of absolute concentration. The association constant is in the range 10(6)-10(8) litre/mol. This implies that the amount of holoenzyme, core enzyme and sigma-factor in RNA polymerase assays may vary according to the absolute concentration of the enzyme.

The magic of sands — The 20th Bjerrum Lecture presented in Oslo, 25 November 2005This paper represents the written version of the 20th Bjerrum Lecture. While it has been edited for the present publication, it retains the general structure of the original lecture, which was intended for a general geotechnical audience. It deliberately points out some of the still-open questions concerning soil modelling. The Bjerrum Lecture is presented in Oslo in alternate years by the Norwegian Geotechnical Society with the support of the Bjerrum Memorial Fund (Laurits Bjerrums Minnefond).

2007 ◽  
Vol 44 (11) ◽  
pp. 1329-1350 ◽  
Author(s):  
David Muir Wood
Keyword(s):  
British Columbia ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
General Structure ◽  
Density Variation ◽  
Memorial Fund ◽  
The Core ◽  
Open Questions ◽  
Soil Modelling

Following the discovery of sinkholes in the W.A.C. Bennett Dam, British Columbia, in 1996, investigations showed that there had apparently been movement of fine material out of the core of the dam. To be able to predict the mechanical consequences of such movement of material, a class of soil model that is able to accommodate changes in both density and grading of the soil is required. An outline of features of the Severn–Trent sand model — which incorporates effects of density variation — is presented and a suggestion is made for ways this model might be extended to include effects of changing particle size distribution.

scholarly journals FACTORS OF GOAL-SETTING IN ARCHITECTURAL DESIGN AS A STIMULATION FOR THE DEVELOPMENT OF THE PROFESSION’S CORE

2021 ◽  
Vol 3 (1) ◽  
pp. 69-80
Author(s):  
Izbash A ◽  
◽  
Fomenko O ◽  
Keyword(s):  
Goal Setting ◽  
Architectural Design ◽  
General Structure ◽  
Point Of View ◽  
Historical Process ◽  
Technological Factors ◽  
The Core ◽  
Hierarchical Levels

Following the national scientific tradition, the core of the profession "architect" can be defined as a continuum of competencies common to all types of architectural work. In turn, competencies consist of specialized skills and knowledge. In the historical process of the development of the profession, new types of competencies appear that form the basis of new specializations. Some of the emerging competencies transfer into the core of the profession on being mastered. The authors of the study have developed a model that allows describing and analyzing the principles of expanding the core of the profession "architect" under the influence of innovative skills and knowledge. The model consists of four basic components: "the profession" architect "; "technological factors", "goal-setting factors" and "architectural-typological factors". The object of the research, based on which the model is built, is the profession “architect”. The three other components of the model are described based on what factors new competencies form and how they affect the expansion of the core of the profession. The article examines the role and place of goal-setting in the general structure of factors that form the profession "architect". The model developed in the study proposes to consider the development of goal-setting factors in architectural design in three main areas: ecosphere, technosphere and society. In turn, each of the directions of goal-setting is considered from the point of view of three main hierarchical levels: strategic, tactical and local. This approach made it possible to identify and analyze the main clusters of competencies that form and expand the core of the profession "architect" under the influence of the goal-setting factor in architectural design.

scholarly journals Tuning Reactivity of Micellar Nanoreactors by Precise Adjustments of the Amphiphiles and Substrates Hydrophobicity

2021 ◽  
Author(s):  
Shahar Tevet ◽  
Shreyas Shankar Wagle ◽  
Gadi Slor ◽  
Roey Amir
Keyword(s):  
Structural Changes ◽  
Aqueous Media ◽  
Reaction Rates ◽  
Exponential Dependence ◽  
Bioorthogonal Chemistry ◽  
The Core ◽  
End Groups ◽  
Polymeric Assemblies ◽  
Further Development ◽  
Fine Tune

<p>Polymeric assemblies, such as micelles, are gaining increasing attention due to their ability to serve as nanoreactors for the execution of organic reactions in aqueous media. The ability to conduct transformations, which have been limited to organic media, in water is essential for the further development of the important fields of green</p><p>catalysis and bioorthogonal chemistry, among other fields. In light of the recent progress in the expanding the scopes of reactions that can be conducted using nanoreactors, we aimed to gain deeper understanding of the roles of the hydrophobicity of both the core of micellar nanoreactors and the substrates on the reaction rates in water. Towards this goal we designed a set of metal-loaded micelles, composed of PEG-dendron amphiphiles and studied their ability to serve as nanoreactors for a palladium mediated depropargylation reaction of four substrates with different LogP values. Using dendrons as the hydrophobic block, allowed us to fine tune the lipophilicity of the dendritic end-groups and study how precise structural changes in the hydrophobicity of the amphiphiles affect the reaction rates. The kinetic data revealed linear relations between the rate constants and the hydrophobicity of the amphiphiles (estimated by the dendron’s</p><p>cLogP), while exponential dependence was obtained for the lipophilicity of the substrates (estimated by their LogP values). Our results demonstrate the vital contributions of the hydrophobicity of both the substrates and amphiphiles on the lipo-selectivity of nanoreactors, illustrating the potential of tuning hydrophobicity as a tool for optimizing</p><p>the reactivity and selectivity of nanoreactors.</p>

The synthesis of star-shaped poly(N-isopropylacrylamide) with two zinc porphyrins as the core and end groups via ATRP and “CLICK” chemistry and a photocatalytic performance study

2020 ◽  
Vol 44 (7) ◽  
pp. 2781-2787 ◽  
Author(s):  
Yifu Ruan ◽  
Bo Gao ◽  
Shuhui LV ◽  
Qian Duan
Keyword(s):  
Click Chemistry ◽  
Photocatalytic Performance ◽  
Performance Study ◽  
The Core ◽  
End Groups ◽  
Zinc Porphyrins

The synthesis of star-shaped poly(N-isopropylacrylamide) with two zinc porphyrins as the core and end groups via ATRP & “CLICK” chemistry and a photocatalytic performance study.

Effects of alkoxylation position on fused-ring electron acceptors

2020 ◽  
Vol 8 (43) ◽  
pp. 15128-15134
Author(s):  
Jingshuai Zhu ◽  
Yiqun Xiao ◽  
Changxi Zhang ◽  
Boyu Jia ◽  
Heng Lu ◽  
...  
Keyword(s):  
Molecular Packing ◽  
Electron Acceptors ◽  
Side Chains ◽  
Photovoltaic Properties ◽  
The Core ◽  
End Groups ◽  
Fused Ring

Four fused-ring electron acceptors composed of the same core and end groups without or with hexyloxyl groups on the core and/or phenyl side chains are compared to systematically study the effects of alkoxylation position on the molecular packing, optical, electronic, and photovoltaic properties of the nonfullerene acceptors.

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