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21.
Dr. Jacob R. Hauser Dr. Edmund T. Bergström Dr. Alexander N. Kulak Dr. Stuart L. Warriner Prof. Dr. Jane Thomas-Oates Dr. Robin S. Bon 《Chembiochem : a European journal of chemical biology》2021,22(8):1430-1439
Matrix-assisted laser desorption/ionisation mass spectrometry (MALDI-MS) is widely used for the analysis of biomolecules. Label-assisted laser desorption/ionisation mass spectrometry (LALDI-MS) is a matrix-free variant of MALDI-MS, in which only analytes covalently attached to a laser desorption/ionisation (LDI) enhancer are detected. LALDI-MS has shown promise in overcoming the limitations of MALDI-MS in terms of sample preparation and MS analysis. In this work, we have developed a series of pyrene-based LDI reagents (LALDI tags) that can be used for labelling and LALDI-MS analysis of reducing carbohydrates from complex (biological) samples without the need for additional chemical derivatisation or purification. We have systematically explored the suitability of four pyrene-based LDI enhancers and three aldehyde-reactive handles, optimised sample preparation, and demonstrated the use of LALDI tags for the detection of lactose. We have also exemplified the potential of LALDI tags for labelling carbohydrates in biological samples by direct detection of lactose in cow's milk. These results demonstrate that LALDI-MS is a promising technique for the analysis of reducing carbohydrates in biological samples, and pave the way for the development of LALDI-MS for glycomics and diagnostics. 相似文献
22.
R.F. Kulak 《Computers & Structures》1984,18(2):319-332
A quasi-Eulerian approach is used in the development of a three-dimensional hydrodynamic finite element. With this approach the motion of the computing grid may be different from the motion of the material. Within each element the field variables are represented by trilinear interpolation functions and the pressure field is assumed to be constant. This leads to a set of simple relations for internal nodal forces that are easily coded and computationally efficient. Because the formulation is based upon a rate approach it is applicable to problems involving large displacements. The technique of degeneration is applied to the hexahedron to generate a pentahedral element. The use of the hour-glass dissipating nodal-forces for mesh stabilization is discussed. The procedure used to couple the fluid and structural domains of a problem is presented. The above method is applied to a three-dimensional, fluid-structure interaction problem in the area of reactor safety. 相似文献
23.
Translated from Poroshkovaya Metallurgiya, No. 2(314), pp. 13–17, February, 1989. 相似文献
24.
Dong Xia Heng Li Jamie Mannering Peng Huang Xiarong Zheng Alexander Kulak Daniel Baker Diana Iruretagoyena Robert Menzel 《Advanced functional materials》2020,30(40)
Reduced‐graphene‐oxide (rGO) aerogels provide highly stabilising, multifunctional, porous supports for hydrotalcite‐derived nanoparticles, such as MgAl‐mixed‐metal‐oxides (MgAl‐MMO), in two commercially important sorption applications. Aerogel‐supported MgAl‐MMO nanoparticles show remarkable enhancements in adsorptive desulfurization performance compared to unsupported nanoparticle powders, including substantial increases in organosulfur uptake capacity (>100% increase), sorption kinetics (>30‐fold), and nanoparticle regeneration stability (>3 times). Enhancements in organosulfur capacity are also observed for aerogel‐supported NiAl‐ and CuAl‐metal‐nanoparticles. Importantly, the electrical conductivity of the rGO aerogel network adds completely new functionality by enabling accurate and stable nanoparticle temperature control via direct electrical heating of the graphitic support. Support‐mediated resistive heating allows for thermal nanoparticle recycling at much faster heating rates (>700 °C?min?1) and substantially reduced energy consumption, compared to conventional, external heating. For the first time, the CO2 adsorption performance of MgAl‐MMO/rGO hybrid aerogels is assessed under elevated‐temperature and high‐CO2‐pressure conditions relevant for pre‐combustion carbon capture and hydrogen generation technologies. The total CO2 capacity of the aerogel‐supported MgAl‐MMO nanoparticles is more than double that of the unsupported nanoparticles and reaches 2.36 mmol·CO2 g?1 ads (at pCO2 = 8 bar, T = 300 °C), outperforming other high‐pressure CO2 adsorbents. 相似文献
25.
In the article, the types of wear characteristic of various printing objects such as printing machines and printing products are described. A formula is proposed that considers various mechanism and factors of the wear, the properties of the materials and environments, and the parameters that determine the wear. The factors that cause the wear of the printing objects are established. 相似文献
26.
A complete cellular manufacturing system design methodology based on axiomatic design principles 总被引:1,自引:0,他引:1
This paper provides a framework and a road map for people who are ready to transform their traditional production system from process orientation to cellular orientation, based on Axiomatic Design (AD) principles. A feedback mechanism for continuous improvement is also suggested for evaluating and improving the cellular design against pre-selected performance criteria. A complete implementation of the proposed methodology at a manufacturing company and resulting performance improvements are also provided. 相似文献
27.
Novikov V. F. Kulak S. M. Parakhin A. S. 《Russian Journal of Nondestructive Testing》2021,57(4):310-319
Russian Journal of Nondestructive Testing - The magnetoelastic demagnetization of a number of steels in the delivery condition under longitudinal elastic tension, transverse compression, and impact... 相似文献
28.
Ostash O. P. Podhurska V. Ya. Vasyliv B. D. Kulak L. D. Kuzmenko M. M. Fisk A. E. 《Materials Science》2020,55(5):648-655
Materials Science - We study the influence of the chemical composition and the conditions of thermomechanical and thermal treatments on the structural strength determined by the characteristics of... 相似文献
29.
The formulation needed for the conductance of heat by means of explicit integration is presented. The implementation of these expressions into a transient structural code, which is also based on explicit temporal integration, is described. Comparisons of theoretical results with code predictions are given both for one-dimensional and two-dimensional problems. The coupled thermal and structural solution of a concrete crucible subjected to a sudden temperature increase predicts the history of cracking. The extent of cracking is compared with experimental data. 相似文献
30.
R.F. Kulak 《Nuclear Engineering and Design》1978,49(1-2)
Presented here is an investigation of the dynamic structural response of the primary vessel's head closure to a hypothetical core disruptive accident (HCDA). Two head-closure designs were considered: the first represents a loop-type design and the second represents a pool-type design. Using representative configurations of liquid metal fast breeder reactors (LMFBR), independent models were used (1) to derive loading pressure histories and (2) to study the structural response of the head closures. Results for loading pressures, displacement histories, deformed profiles, stress magnitudes and plastically deformed regions are presented. 相似文献