147 research outputs found
Green together? The effects of companies' innovation collaboration with different partner types on ecological process and product innovation
This paper investigates the effect of companies' innovation collaboration with different partner types on the emergence of different typologies of ecological innovation (EI), specifically process- and product-EI. Econometric analyses, based on a sample of 546 German manufacturing companies collected as part of the Community Innovation Survey, indicate a differential effect of collaboration with individual partner types. Specifically, we find that collaboration with consumers is associated positively with both process- and product-EI, whereas collaboration with universities and suppliers is associated positively only with process-EI. Collaboration with enterprise customers and competitors is neither associated with process-EI nor product-EI. Our results shed light on the mechanisms within the recently established open eco-innovation mode and emphasise the importance for theory and practice of distinguishing among collaboration partners, contingent on the underlying typology of EI. We discuss important implications for theory and practice
Iis - Integrated Interactome System: A Web-based Platform For The Annotation, Analysis And Visualization Of Protein-metabolite-gene-drug Interactions By Integrating A Variety Of Data Sources And Tools
Background: High-throughput screening of physical, genetic and chemical-genetic interactions brings important perspectives in the Systems Biology field, as the analysis of these interactions provides new insights into protein/gene function, cellular metabolic variations and the validation of therapeutic targets and drug design. However, such analysis depends on a pipeline connecting different tools that can automatically integrate data from diverse sources and result in a more comprehensive dataset that can be properly interpreted. Results: We describe here the Integrated Interactome System (IIS), an integrative platform with a web-based interface for the annotation, analysis and visualization of the interaction profiles of proteins/genes, metabolites and drugs of interest. IIS works in four connected modules: (i) Submission module, which receives raw data derived from Sanger sequencing (e.g. two-hybrid system); (ii) Search module, which enables the user to search for the processed reads to be assembled into contigs/singlets, or for lists of proteins/genes, metabolites and drugs of interest, and add them to the project; (iii) Annotation module, which assigns annotations from several databases for the contigs/singlets or lists of proteins/genes, generating tables with automatic annotation that can be manually curated; and (iv) Interactome module, which maps the contigs/singlets or the uploaded lists to entries in our integrated database, building networks that gather novel identified interactions, protein and metabolite expression/concentration levels, subcellular localization and computed topological metrics, GO biological processes and KEGG pathways enrichment. This module generates a XGMML file that can be imported into Cytoscape or be visualized directly on the web. Conclusions: We have developed IIS by the integration of diverse databases following the need of appropriate tools for a systematic analysis of physical, genetic and chemical-genetic interactions. IIS was validated with yeast two-hybrid, proteomics and metabolomics datasets, but it is also extendable to other datasets. 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Kinase Inhibitor Profile For Human Nek1, Nek6, And Nek7 And Analysis Of The Structural Basis For Inhibitor Specificity
Human Neks are a conserved protein kinase family related to cell cycle progression and cell division and are considered potential drug targets for the treatment of cancer and other pathologies. We screened the activation loop mutant kinases hNek1 and hNek2, wild-type hNek7, and five hNek6 variants in different activation/phosphorylation statesand compared them against 85 compounds using thermal shift denaturation. We identified three compounds with significant Tm shifts: JNK Inhibitor II for hNek1(Ä262-1258)-(T162A), Isogranulatimide for hNek6(S206A), and GSK-3 Inhibitor XIII for hNek7wt. Each one of these compounds was also validated by reducing the kinases activity by at least 25%. The binding sites for these compounds were identified by in silico docking at the ATP-binding site of the respective hNeks. Potential inhibitors were first screened by thermal shift assays, had their efficiency tested by a kinase assay, and were finally analyzed by molecular docking. 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Benchmark datasets for 3D MALDI- and DESI-imaging mass spectrometry
BACKGROUND: Three-dimensional (3D) imaging mass spectrometry (MS) is an analytical chemistry technique for the 3D molecular analysis of a tissue specimen, entire organ, or microbial colonies on an agar plate. 3D-imaging MS has unique advantages over existing 3D imaging techniques, offers novel perspectives for understanding the spatial organization of biological processes, and has growing potential to be introduced into routine use in both biology and medicine. Owing to the sheer quantity of data generated, the visualization, analysis, and interpretation of 3D imaging MS data remain a significant challenge. Bioinformatics research in this field is hampered by the lack of publicly available benchmark datasets needed to evaluate and compare algorithms. FINDINGS: High-quality 3D imaging MS datasets from different biological systems at several labs were acquired, supplied with overview images and scripts demonstrating how to read them, and deposited into MetaboLights, an open repository for metabolomics data. 3D imaging MS data were collected from five samples using two types of 3D imaging MS. 3D matrix-assisted laser desorption/ionization imaging (MALDI) MS data were collected from murine pancreas, murine kidney, human oral squamous cell carcinoma, and interacting microbial colonies cultured in Petri dishes. 3D desorption electrospray ionization (DESI) imaging MS data were collected from a human colorectal adenocarcinoma. CONCLUSIONS: With the aim to stimulate computational research in the field of computational 3D imaging MS, selected high-quality 3D imaging MS datasets are provided that could be used by algorithm developers as benchmark datasets
ECCD-induced sawtooth crashes at W7-X
The optimised superconducting stellarator W7-X generates its rotational transform by means of
external coils, therefore no toroidal current is necessary for plasma confinement. Electron
cyclotron current drive experiments were conducted for strikeline control and safe divertor
operation. During current drive experiments periodic and repetitive crashes of the central
electron temperature, similar to sawtooth crashes in tokamaks, were detected. Measurements
from soft x-ray tomography and electron cyclotron emission show that the crashes are preceded
by weak oscillating precursors and a displacement of the plasma core, consistent with a
(m, n)=(1, 1) mode. The displacement occurs within 100μs, followed by expulsion and
redistribution of the core into the external part of the plasma. Two types of crashes, with
different frequencies and amplitudes are detected in the experimental program. For these
non-stationary parameters a strong dependence on the toroidal current is found. A 1-D heuristic
model for current diffusion is proposed as a first step to explain the characteristic crash time.
Initial results show that the modelled current diffusion timescale is consistent with the initial
crash frequency and that the toroidal current rise shifts the position where the instability is
triggered, resulting in larger crash amplitudes
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