240 Result(s)
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Article
Effects of a High Magnetic Field on the Microstructure of Ni-Based Single-Crystal Superalloys During Directional Solidification
High magnetic fields are widely used to improve the microstructure and properties of materials during the solidification process. During the preparation of single-crystal turbine blades, the microstructure of ...
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Article
Rh2O3/hexagonal CePO4 nanocatalysts for N2O decomposition
Hexagonal CePO4 nanorods were prepared by a precipitation method and hexagonal CePO4 nanowires were prepared by hydrothermal synthesis at 150 °C. Rh (NO3)3 was then used as a precursor for the impregnation of Rh2
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Article
“Sponge city” concept helps solve China’s urban water problems
The scale of China’s urbanization in recent decades is almost unprecedented in human history. Urban water problems are always prevalent and have been intensifying during the rapid urbanization process. In res...
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Article
Designing an atmosphere controlling hollow fiber membrane system for mango preservation
We devised an atmosphere controlling facility to gain a longer life span for mango. A membrane module made of polyethersulfone/polydimethylsiloxane (PES/PDMS) composite membrane was applied to selectively perm...
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Article
Low temperature in-situ preparation of reduced graphene oxide/ZnO nanocomposites for highly sensitive photodetectors
Unlike traditional approach to improve photoresponse performance of ZnO-based optoelectronic devices, a ultra-low temperature solvothermal process was utilized to prepare reduced graphene oxide (rGO)/ZnO nanoc...
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Open Access This content is freely available online to anyone, anywhere at any time.
Article
Viability of karezes (ancient water supply systems in Afghanistan) in a changing world
The Afghanistan population living far from rivers relies upon groundwater delivered from karezes (sub-horizontal tunnels). Karezes exploit unconfined groundwater in alluvial fans recharged largely by snowmelt ...
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Article
Columnar-to-Equiaxed Transition and Equiaxed Grain Alignment in Directionally Solidified Ni3Al Alloy Under an Axial Magnetic Field
The effect of an axial magnetic field on the solidification structure in directionally solidified Ni-21.5Al-0.4Zr-0.1B (at. pct) alloy was investigated. The experimental results indicated that the application ...
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Open Access This content is freely available online to anyone, anywhere at any time.
Article
Suppression of cucumber stachyose synthase gene (CsSTS) inhibits phloem loading and reduces low temperature stress tolerance
Stachyose is the main transporting sugar in phloem of Raffinose family oligosaccharides-transporting species. Stachyose synthase (STS) is a key enzyme for stachyose biosynthesis, but the gene encoding STS is p...
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Article
Novel amphiphilic PEG-hydroxycamptothecin conjugates as glutathione-responsive prodrug nanocapsules for cancer chemotherapy
A series of novel hydroxycamptothecin (HCPT) conjugates (13a–14d), which contained a polyethylene glycol moiety and disulfide bond, were designed and synthesized in five to six steps, with overall yields of 20–39...
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Article
A polynomial equation-based interpolation method of NURBS tool path with minimal feed fluctuation for high-quality machining
Due to the approximation errors of interpolation methods in non-uniform rational b-spline (NURBS) interpolation, feed fluctuation is inevitable, which has great effects on the machining quality and should be m...
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Article
Sums of Fourier coefficients of cusp forms of level D twisted by exponential functions
Let g be a holomorphic or Maass Hecke newform of level D and nebentypus χD, and let a g (n) be its n-th Fourier coefficient. We consider the sum ...
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Article
DRα1-MOG-35-55 Reduces Permanent Ischemic Brain Injury
Stroke induces a catastrophic immune response that involves the global activation of peripheral leukocytes, especially T cells. The human leukocyte antigen-DRα1 domain linked to MOG-35-55 peptide (DRα1-MOG-35-...
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Article
Detection of the Presence of Reconstituted Milk in Raw Milk and in Pasteurized Milk Using Synchronous Fluorescence Spectroscopy
The increasing demand for dairy products has led to the adulteration of milk with reconstituted milk. This may be a problem for unsuspecting consumers. In this study, synchronous fluorescence spectroscopy was ...
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Article
Decreased human leukocyte antigen A*02:01 frequency is associated with risk of glioma and existence of human cytomegalovirus: a case–control study in Northern China
Human leukocyte antigens (HLAs) play an important role in host defense against viral infection and tumorigenesis. Human cytomegalovirus (HCMV) has been linked to glioma development. This study investigated the...
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Article
Recent advances in feature selection and its applications
Feature selection is one of the key problems for machine learning and data mining. In this review paper, a brief historical background of the field is given, followed by a selection of challenges which are of ...
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Article
Diagnostic value of circulating microRNAs for osteosarcoma in Asian populations: a meta-analysis
A large number of studies have provided new insights into the diagnostic value of circulating microRNAs (miRNA) for osteosarcoma (OS), one of the most common primary malignancies in adolescents. However, incon...
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Article
Adaptive feedrate planning on parametric tool path with geometric and kinematic constraints for CNC machining
Feedrate planning is crucial for CNC systems to generate a smooth and fast movement, which is closely related to the machining quality and machining efficiency. In this paper, a new method for adaptive feedrat...
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Open Access This content is freely available online to anyone, anywhere at any time.
Article
Existence of positive solutions for discrete delta-nabla fractional boundary value problems with p-Laplacian
In this paper, we consider a discrete delta-nabla boundary value problem for the fractional difference equation with p-Laplacian ...
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Article
Inhibitory effect of homocysteine on rat neural stem cell growth in vitro is associated with reduced protein levels and enzymatic activities of aconitase and respiratory complex III
Increased blood plasma concentration of the sulphur amino acid homocysteine (Hcy) is considered as an independent risk factor of the neurodegenerative diseases. However, the detailed molecular mechanisms by wh...
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Article
Microstructure, Magnetism and Magnetic Field Induced-Strain in Er-Doped Co-Ni-Al Polycrystalline Alloy
A large magnetic field-induced strain (MFIS) was discovered in single-crystal alloys, whereas it is proven difficult for such apparent strain values to be obtained in polycrystalline alloys. In order for an ap...
