21 Result(s)
within
English
Earth Sciences, general
Engineering, general
Science, Humanities and Social Sciences, multidisciplinary
**zheng Wang
Article
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Article
Digital zenith telescope prototype of China
Classical optical astronomy measures the direction of the local plumb line on the stellar background, and is influenced by variations of the earth gravity field. Therefore, classical optical astrometry can be ...
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Image and data processing of digital zenith telescope (DZT-1) of China
The first digital zenith telescope prototype (DZT-1) of China was successfully developed by National Astronomical Observatories, Chinese Academy of Sciences and Shandong University of Science and Technology at...
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Article
Assessing bacterial magnetotactic behavior by using permanent magnet blocks
Assessing the movement of magnetotactic bacteria (MTB) under magnetic fields is a key to exploring the function of the magnetotaxis. In this study, a simple method was used to analyze the behavior of MTB, whic...
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Urban structure and the risk of influenza A (H1N1) outbreaks in municipal districts
Changsha was one of the most affected areas during the 2009 A (H1N1) influenza pandemic in China. Here, we analyze the spatial–temporal dynamics of the 2009 pandemic across Changsha municipal districts, evalua...
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Open AccessVariation of dependence of the cusp location at different altitude on the dipole tilt
Using the Cluster cusp crossings data, dependence of the cusp location at the mid-altitude on the geomagnetic dipole tilt during northward IMF is studied. The results show that the cusp center moves 0.051° Inv...
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Open AccessSolar influenced late Holocene temperature changes on the northern Tibetan Plateau
Considerable efforts have been made to extend temperature records beyond the instrumental period through proxy reconstructions, in order to further understand the mechanisms of past climate variability. Yet, t...
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Open AccessStructure of the kinase domain of human RNA-dependent protein kinase with K296R mutation reveals a face-to-face dimer
RNA-dependent protein kinase (PKR) is crucial for the innate immune response, cell growth, proliferation, signal transduction and apoptosis. The activation process of PKR has been studied for many years and is...
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Open AccessCalibration of the U 37 K′ index of long-chain alkenones with the in-situ water temperature in Lake Qinghai in the Tibetan Plateau
Long-chain alkenones (LCAs) can potentially be used as indicators to understand past variations in lacustrine environments. Previous research has suggested that the relationship between the temperature and the...
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Open AccessA new RICEs model with the global emission reduction schemes
Taking into account the fact of global economic integration, this paper improves the RICE model and the MRICES model, and establishes a new integrated assessment model MRICES-2012, which takes Ramsey utility a...
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Open AccessEstimation of provincial forest carbon sink capacities in Chinese mainland
Estimation of the capacity of provincial forest carbon sinks in chinese mainland using the co2fix model provides data support for the effective management of provincial regions. according to china’s sixth nati...
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Synthesis of novel chiral bisoxazoline ligands with a spiro[4,4]-1,6-nonadiene skeleton
A new type of chiral bisoxazoline ligands 1 based on spiro[4,4]-1,6-nonadiene backbone was easily prepared in six steps from racemic spiro[4,4]-nonane-1,6-dione, with the Pd-catalyzed coupling of the enol triflat...
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Nitrogen isotopic composition of plant-soil in the Loess Plateau and its responding to environmental change
The nitrogen isotope of soil is of emerging significance as an indicator of climatic change and biogeochemical cycle of nitrogen in nature systems. In this paper, the nitrogen content and isotopic composition ...
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Occurrence of sulfonamide antibiotics in sewage treatment plants
The occurrence of sulfonamide antibiotics (SAs) was investigated in the six sewage treatment plants (STPs) of Bei**g, China. Of the 13 objective antibiotics, sulfamethoxazole, sulfapyridine, sulfamerazine, su...
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Large scale production of carbon nanotube arrays on the sphere surface from liquefied petroleum gas at low cost
Liquefied petroleum gas (LPG), a cheap industrial material, is used as carbon source to produce carbon nanotube (CNT) arrays on ceramic spherical surface on a large scale in the floating catalyst process. The ...
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Giant magneto-impedance and low-frequency magneto-resistance effect in NiFeB coated composite wires
Composite wires of 100 μ insulated CuBe wire plated with a layer of NiFeB were produced by electroless-deposition, and their magnetic properties were studied. The results showed that a good magneto-impedance (...
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Inhibitory effect of a modified adenovirus type 5E1A gene on the NF-κB activity in porcine aortic endothelial cells induced by TNF-α
The transcription factor nuclear factor κB (NF-κB) plays a key role in the delayed xenograft rejection (DXR). One of the important objects in the field is how to inhibit the NF-κB activity at optimal level. Th...
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Inhibitory effect of the adenovirus type 5 E1A protein expressed in the yeast system on the human tumor cell growth
Adenovirus 5 type E1A as a tumor suppressor gene can inhibit tumor growth and enhance the sensitivity of chemotherapy and radiotherapy. E1A have the ability to integrate into the host genome, resulting in long-ti...
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Specific myeloprotection via multidrug resistance 1 gene controlled by aminopeptidase N myeloid promoter
In the treatment of tumor patients introduction of multidrug resistance genes into hematopoietic cells has been reported as an approach for reducing myelotoxicity created by antitumor drugs. However, the nonsp...
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Cloning of aminopeptidase N promoter and its activity in hematopoietic cell and different tumor cell lines
Aminopeptidase N (APN) promoter region was cloned and sequenced from peripheral blood mononuclear cells. The recombinant reporter construct containing the promoter and luciferase gene, designated pXP1-APNLuc, ...
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Expression of neurofilament gene in spinal motoneurons during neural regeneration
The techniquein situ hybridization was used to measure the levels of light (NF-L), medium (NF-M) and heavy (NF-H) neurofilament protein subunits mRNA in L4-6 spinal motoneurons in adult rat during regeneration fo...
