Faculty Opinions recommendation of Large-scale spatial synchrony and the stability of forest biodiversity revisited.

Levan has wide applications in chemical, cosmetic, pharmaceutical and food industries. The free levansucrase is usually used in the biosynthesis of levan, but the poor reusability and low stability of free levansucrase have limited its large-scale use. To address this problem, the surface-displayed levansucrase in Saccharomyces cerevisiae were generated and evaluated in this study. The levansucrase from Zymomonas mobilis was displayed on the cell surface of Saccharomyces cerevisiae EBY100 using a various yeast surface display platform. The N-terminal fusion partner is based on a-agglutinin, and the C-terminal one is Flo1p. The yield of levan produced by these two whole-cell biocatalysts reaches 26 g/L and 34 g/L in 24 h, respectively. Meanwhile, the stability of the surface-displayed levansucrases is significantly enhanced. After six reuses, these two biocatalysts retained over 50% and 60% of their initial activities, respectively. Furthermore, the molecular weight and polydispersity test of the products suggested that the whole-cell biocatalyst of levansucrase displayed by Flo1p has more potentials in the production of levan with low molecular weight which is critical in certain applications. In conclusion, our method not only enable the possibility to reuse the enzyme, but also improves the stability of the enzyme.

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INTRACISTRONIC MAPPING OF ELECTROPHORETIC SITES IN DROSOPHILA MELANOGASTER: FIDELITY OF INFORMATION TRANSFER BY GENE CONVERSION

Genetics ◽

10.1093/genetics/76.2.289 ◽

1974 ◽

Vol 76 (2) ◽

pp. 289-299

Author(s):

Margaret McCarron ◽

William Gelbart ◽

Arthur Chovnick

Keyword(s):

Drosophila Melanogaster ◽

Information Transfer ◽

Large Scale ◽

Genetic Basis ◽

Xanthine Dehydrogenase ◽

Specific Protein ◽

Wild Type ◽

Electrophoretic Variation ◽

The Stability ◽

Recombination Experiments

ABSTRACT A convenient method is described for the intracistronic mapping of genetic sites responsible for electrophoretic variation of a specific protein in Drosophila melanogaster. A number of wild-type isoalleles of the rosy locus have been isolated which are associated with the production of electrophoretically distinguishable xanthine dehydrogenases. Large-scale recombination experiments were carried out involving null enzyme mutants induced on electrophoretically distinct wild-type isoalleles, the genetic basis for which is followed as a nonselective marker in the cross. Additionally, a large-scale recombination experiment was carried out involving null enzyme rosy mutants induced on the same wild-type isoallele. Examination of the electrophoretic character of crossover and convertant products recovered from the latter experiment revealed that all exhibited the same parental electrophoretic character. In addition to documenting the stability of the xanthine dehydrogenase electrophoretic character, this observation argues against a special mutagenesis hypothesis to explain conversions resulting from allele recombination studies.

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A Digital Framework to Predict the Sunshine Requirements of Landscape Plants

Applied Sciences ◽

10.3390/app11052098 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2098

Author(s):

Heyi Wei ◽

Wenhua Jiang ◽

Xuejun Liu ◽

Bo Huang

Keyword(s):

Solar Radiation ◽

Plant Species ◽

Large Scale ◽

Normal Growth ◽

Adaptive Selection ◽

Landscape Plant ◽

Landscape Plants ◽

The Stability ◽

Stability And Accuracy ◽

The City

Knowledge of the sunshine requirements of landscape plants is important information for the adaptive selection and configuration of plants for urban greening, and is also a basic attribute of plant databases. In the existing studies, the light compensation point (LCP) and light saturation point (LSP) have been commonly used to indicate the shade tolerance for a specific plant; however, these values are difficult to adopt in practice because the landscape architect does not always know what range of solar radiation is the best for maintaining plant health, i.e., normal growth and reproduction. In this paper, to bridge the gap, we present a novel digital framework to predict the sunshine requirements of landscape plants. First, the research introduces the proposed framework, which is composed of a black-box model, solar radiation simulation, and a health standard system for plants. Then, the data fitting between solar radiation and plant growth response is used to obtain the value of solar radiation at different health levels. Finally, we adopt the LI-6400XT Portable Photosynthetic System (Li-Cor Inc., Lincoln, NE, USA) to verify the stability and accuracy of the digital framework through 15 landscape plant species of a residential area in the city of Wuhan, China, and also compared and analyzed the results of other researchers on the same plant species. The results show that the digital framework can robustly obtain the values of the healthy, sub-healthy, and unhealthy levels for the 15 landscape plant species. The purpose of this study is to provide an efficient forecasting tool for large-scale surveys of plant sunshine requirements. The proposed framework will be beneficial for the adaptive selection and configuration of urban plants and will facilitate the construction of landscape plant databases in future studies.

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No-z Model for Magnetic Fields of Different Astrophysical Objects and Stability of the Solutions

Data ◽

10.3390/data6010004 ◽

2021 ◽

Vol 6 (1) ◽

pp. 4

Author(s):

Evgeny Mikhailov ◽

Daniela Boneva ◽

Maria Pashentseva

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Large Scale ◽

Point Of View ◽

Accretion Discs ◽

Wide Range ◽

Astrophysical Objects ◽

Alpha Effect ◽

The Stability ◽

The Magnetic Field

A wide range of astrophysical objects, such as the Sun, galaxies, stars, planets, accretion discs etc., have large-scale magnetic fields. Their generation is often based on the dynamo mechanism, which is connected with joint action of the alpha-effect and differential rotation. They compete with the turbulent diffusion. If the dynamo is intensive enough, the magnetic field grows, else it decays. The magnetic field evolution is described by Steenbeck—Krause—Raedler equations, which are quite difficult to be solved. So, for different objects, specific two-dimensional models are used. As for thin discs (this shape corresponds to galaxies and accretion discs), usually, no-z approximation is used. Some of the partial derivatives are changed by the algebraic expressions, and the solenoidality condition is taken into account as well. The field generation is restricted by the equipartition value and saturates if the field becomes comparable with it. From the point of view of mathematical physics, they can be characterized as stable points of the equations. The field can come to these values monotonously or have oscillations. It depends on the type of the stability of these points, whether it is a node or focus. Here, we study the stability of such points and give examples for astrophysical applications.

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A new multi-level algorithm for balanced partition problem on large scale directed graphs

Advances in Aerodynamics ◽

10.1186/s42774-021-00074-x ◽

2021 ◽

Vol 3 (1) ◽

Author(s):

Xianyue Li ◽

Yufei Pang ◽

Chenxia Zhao ◽

Yang Liu ◽

Qingzhen Dong

Keyword(s):

Large Scale ◽

Directed Graphs ◽

Vlsi Design ◽

Graph Partition ◽

Partition Problem ◽

Multi Level ◽

The Stability ◽

Recursive Partition ◽

Balanced Partition ◽

Partition Method

AbstractGraph partition is a classical combinatorial optimization and graph theory problem, and it has a lot of applications, such as scientific computing, VLSI design and clustering etc. In this paper, we study the partition problem on large scale directed graphs under a new objective function, a new instance of graph partition problem. We firstly propose the modeling of this problem, then design an algorithm based on multi-level strategy and recursive partition method, and finally do a lot of simulation experiments. The experimental results verify the stability of our algorithm and show that our algorithm has the same good performance as METIS. In addition, our algorithm is better than METIS on unbalanced ratio.

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Application of projection-based model reduction to finite-element plate models for two-dimensional traveling waves

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x16679295 ◽

2016 ◽

Vol 28 (14) ◽

pp. 1886-1904 ◽

Cited By ~ 6

Author(s):

Vijaya VN Sriram Malladi ◽

Mohammad I Albakri ◽

Serkan Gugercin ◽

Pablo A Tarazaga

Keyword(s):

Finite Element ◽

Model Reduction ◽

Traveling Waves ◽

Large Scale ◽

Fe Model ◽

Plate Model ◽

Reduction Techniques ◽

State Frequency ◽

Scale Down ◽

The Stability

A finite element (FE) model simulates an unconstrained aluminum thin plate to which four macro-fiber composites are bonded. This plate model is experimentally validated for single and multiple inputs. While a single input excitation results in the frequency response functions and operational deflection shapes, two input excitations under prescribed conditions result in tailored traveling waves. The emphasis of this article is the application of projection-based model reduction techniques to scale-down the large-scale FE plate model. Four model reduction techniques are applied and their performances are studied. This article also discusses the stability issues associated with the rigid-body modes. Furthermore, the reduced-order models are utilized to simulate the steady-state frequency and time response of the plate. The results are in agreement with the experimental and the full-scale FE model results.

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Australian agricultural scale and corporate agroholdings: environmental and climatic impacts

International Food and Agribusiness Management Review ◽

10.22434/ifamr2016.0027 ◽

2017 ◽

Vol 20 (2) ◽

pp. 187-190 ◽

Cited By ~ 3

Author(s):

Bradley Plunkett ◽

Andrew Duff ◽

Ross Kingwell ◽

David Feldman

Keyword(s):

Large Scale ◽

Climatic Variability ◽

Institutional Setting ◽

Corporate Ownership ◽

Family Structures ◽

Climatic Impacts ◽

The Stability ◽

Average Size ◽

The Impact ◽

Concentrate Production

The average size of Australian farms in scale and revenue are the globe’s largest. This scale is a result, in part, of low average rural population densities; development patterns in broadacre production; low levels of effective public policy transfers; a stable and suitable institutional setting suitable for corporate and other large scale investment; and low yields. It is also a factor of the natural variability of the country’s climatic systems which have contributed to the scale of extensive northern cattle production; this variability has implications for the pattern of ownership of broadacre and extensive production. Corporate ownership, tends to concentrate production aggregations at sufficient scale to offset its additional overheads in areas of relative climatic stability and to replicate these agroholding aggregations spatially to protect the stability of revenue flows. Family structures are more dominant in areas of greater climatic variability. Of interest is the impact that any increasing climatic variability (versus rapid changes in technology) may have upon this pattern.

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World 2021: Pandemic and economic problems remain acute

Voprosy Ekonomiki ◽

10.32609/0042-8736-2021-12-5-20 ◽

2021 ◽

pp. 5-20

Author(s):

M. V. Ershov

Keyword(s):

Economic System ◽

Global Economy ◽

Large Scale ◽

Real Economy ◽

Economic Problems ◽

Support Measures ◽

Long Time ◽

Digital Money ◽

Successful Business ◽

The Stability

The global economy continues to grow, albeit mainly due to large-scale support measures from governments and regulators. Moreover, the latter are not sure about the prospects for such development, since the economies do not demonstrate the potential for independent growth. As a result, in order to stimulate it, regulators are forced to expand the range of their tools, mechanisms, approaches, otherwise the risks to the stability of the global financial and economic system increase. All this is happening against the background of negative rates, which have become virtually ubiquitous and persist for a long time. New growth records are being set in the stock markets, and their gap from the real economy is growing. A number of sectors are beginning to dominate, forming distortions and bubbles in the markets. In such conditions, the importance of digital money, ecosystems, etc. increases. Moreover, the faster and more efficiently regulators can integrate into these formats, the more successful business, the population, and the economy as a whole will be.

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TADOSS: computational estimation of tandem domain swap stability

Bioinformatics ◽

10.1093/bioinformatics/bty974 ◽

2018 ◽

Vol 35 (14) ◽

pp. 2507-2508 ◽

Cited By ~ 2

Author(s):

Aleix Lafita ◽

Pengfei Tian ◽

Robert B Best ◽

Alex Bateman

Keyword(s):

Large Scale ◽

Domain Swapping ◽

Coarse Grained ◽

Supplementary Information ◽

Simulation Studies ◽

Computational Tools ◽

Domain Swap ◽

Computational Estimation ◽

High Propensity ◽

The Stability

Abstract Summary Proteins with highly similar tandem domains have shown an increased propensity for misfolding and aggregation. Several molecular explanations have been put forward, such as swapping of adjacent domains, but there is a lack of computational tools to systematically analyze them. We present the TAndem DOmain Swap Stability predictor (TADOSS), a method to computationally estimate the stability of tandem domain-swapped conformations from the structures of single domains, based on previous coarse-grained simulation studies. The tool is able to discriminate domains susceptible to domain swapping and to identify structural regions with high propensity to form hinge loops. TADOSS is a scalable method and suitable for large scale analyses. Availability and implementation Source code and documentation are freely available under an MIT license on GitHub at https://github.com/lafita/tadoss. Supplementary information Supplementary data are available at Bioinformatics online.

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