40 research outputs found
Cellulosimicrobium cellulans strain E4-5 enzymatic hydrolysis of curdlan for production of (1 -> 3)-linked beta-D-glucan oligosaccharides
No full textIn order to find an efficient enzymatic tool for curdlan degradation to produce (1 -> 3)-linked beta-D-glucan oligosaccharides, strain E4-5 (registration number JN089883, Genbank) was isolated from seaside soil. The 16S rRNA gene sequencing classified it as Cellulosimicrobium cellulans. It was the first reported microorganism that succeeded in degrading high-set heated curdlan blocks. The ferments of strain E4-5 also showed good degradation effects on laminaran and alkali-neutralized curdlan. Due to the products with less amount of glucose, it was assumed that endo-1,3-beta-glucanases of strain E4-5 had a greater hydrolyzing effect than exo-1,3-beta-glucanases. This indicated that strain E4-5 was a promising microorganism to hydrolyze (1 -> 3)-linked beta-D-glucan. Moreover, alkali-neutralization pretreatment was effective for promoting a more diversified degree of polymerization (DP) of (1 -> 3)-linked beta-D-glucan oligosaccharides under enzymatic hydrolysis and will pave the way for making full use of curdlan for production of glucan oligosaccharides. (C) 2015 Elsevier Ltd. All rights reserved
(1 -> 3)-beta-D-Glucan oligosaccharides monomers purification and its H2O2 induction effect study
No full textIn order to produce highly purified (1 -> 3)-beta-D-glucan oligosaccharides ((1 -> 3)-beta-D-GOS) monomers, a hydrophilic interaction liquid chromatography (HILIC) system with X-Amide stationary phase was performed. Nine (1 -> 3)-beta-D-GOS monomers with degree of polymerization (DP) from 2 to 10 were successfully separated. Matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) demonstrated that these monomers were with high purity. Furthermore, a hydrogen peroxide (H2O2) online detection method was established to monitor H2O2 releases in tobacco cells. This is the first report on nine consecutive (1 -> 3)-beta-D-GOS monomers purification and its effect upon H2O2-releasing in plants. Itwas found that (1 -> 3)-beta-D-GOS monomers with higher DP induced stronger defense responses in plants, which will pave the way for elucidating the relationship between (1 -> 3)-beta-D-GOS and biological activities. (C) 2015 Elsevier B.V. All rights reserved
Alternative Theorems for Nonlinear Projection Equations and Applications to Generalized Complementarity Problems
No full text. This paper introduces two concepts of exceptional families for a class of nonlinear projection equations which provide a unified formulation of several special cases such as finite-dimensional variational inequalities and complementarity problems. Based on these concepts, two alternative theorems, and then two sufficient existence conditions, are established for this class of nonlinear projection equations. We use one of the alternative theorems to establish several new existence results for generalized complementarity problems with new classes of functions such as quasi-P , and P (ø; ff; fi)-maps. The class of quasi-P -maps is broad enough to encompass the union of quasi-monotone maps and nonlinear P -maps. The existence results established here significantly relax several previous solution conditions in the literature. Key words. Nonlinear projection equations, variational inequalities, generalized complementarity problems, exceptional families. 1 The research of this author i..
Using Spatial Temporal Graph Convolutional Network Dynamic Scene Graph for Video Captioning of Pedestrians Intention
No full text
A modified carrier-to-code leveling method for retrieving ionospheric observables and detecting short-term temporal variability of receiver differential code biases
No full textSensing the ionosphere with the global positioning system involves two sequential tasks, namely the ionospheric observable retrieval and the ionospheric parameter estimation. A prominent source of error has long been identified as short-term variability in receiver differential code bias (rDCB). We modify the carrier-to-code leveling (CCL), a method commonly used to accomplish the first task, through assuming rDCB to be unlinked in time. Aside from the ionospheric observables, which are affected by, among others, the rDCB at one reference epoch, the Modified CCL (MCCL) can also provide the rDCB offsets with respect to the reference epoch as by-products. Two consequences arise. First, MCCL is capable of excluding the effects of time-varying rDCB from the ionospheric observables, which, in turn, improves the quality of ionospheric parameters of interest. Second, MCCL has significant potential as a means to detect between-epoch fluctuations experienced by rDCB of a single receiver.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Mathematical Geodesy and Positionin
