Wyniki wyszukiwania - Biblioteka Nauki

1

Microlocalization and distribution of digestion-resistant aromatic lignin and cellulosic compounds in feeds at cellular and subcellular levels: A novel approach

100%

Yu P.

Journal of Animal and Feed Sciences

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2007

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tom 16

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nr 4

505-525

2

Public watermarking algorithm based on the polarity of DCT coefficients

63%

Yu P. , Liu B.

Image Processing & Communications

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2006

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tom Vol. 11, no 2

63-73

EN

This paper presents a novel public watermarking algorithm based on the AC coefficients distribution properties of an image's DCT transform. This method uses the signs of the DCT coefficients to represent the bit 1 and 0 respectively. Furthermore, the parameters of this scheme can be calculated since we analyze the round-off errors caused by storing a watermarked image. The experiment results show that the algorithm is effective and robust to common image processing operations, such as JPEG lossy compression, Gaussian noise attack, cropping, lowpass filter and histogram equalization.

3

Using Cornell system and NRC dairy model to predict nutrient supply from new super-genotype of oat grain in comaprison with two normal varieties of oat

51%

Niu Z. , Rossnagel B. G. , Yu P.

Journal of Animal and Feed Sciences. Supplement

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2007

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tom 16

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nr 2

4

Chemical characteristic and nutritive values of super-henotype of oat vs normal varieties of oats for ruminants

51%

Niu Z. , Rossnagel B. G. , Yu P.

Journal of Animal and Feed Sciences. Supplement

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2007

|

tom 16

|

nr 2

5

Strongyloides stercoralis infection in a patient with chronic renal failure from North China

51%

Yu P. , Wang X. , Wen X. , Ji Y.

Acta Parasitologica

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2021

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tom 66

|

nr 3

6

Removal of Random Noise in Seismic Data by Time-varying Window-length Time-frequency Peak Filtering

51%

Yu P. , Li Y. , Lin H. , Wu N.

Acta Geophysica

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2016

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tom Vol. 64, no. 5

1703--1714

EN

Time-frequency peak filtering (TFPF) is an effective tool for the removal of random noise and can be used to process seismic data with a low signal-to-noise ratio. A crucial aspect of this algorithm is the choice of window length (WL) of the time-frequency distribution. Whereas a fixed WL cannot simultaneously preserve signal and attenuate noise, timevarying WLs can achieve this goal. We propose a new method, L-DVV (delay vector variance), which successfully processes non-stationary signals by using the surrogate to measure the non-linearity of a time series. This method is sensitive to random noise and can accurately recover seismic signal masked by noise. Since the linearity criterion also meets the unbiased estimation criterion of the TFPF algorithm, the L-DVV method can be used for time-varying WL TFPF processing. Analysis of synthetic and real seismic data shows that the time-varying WL TFPF algorithm is effective at removing noise and recovering seismic signal.

7

Effects of hybrid giant napier biochar on cadmium migration in a cabbage-soil system contaminated with cadmium and butachlor

45%

He H. , Pan J. , Yu P. , Chen G. , Li H.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 2

EN

We investigated the effects of high-productivity plant hybrid giant Napier (HGN)-derived biochars prepared at different pyrolysis temperatures on Cd migration in a soil-cabbage system contaminated with Cd and butachlor. The results showed that with the enhancement amount of biochar applied, soil pH and electrical conductivity (EC) increased, whereas the available Cd content dropped significantly (P<0.05). The maximum decreasing value (66.08%) of the available Cd content was observed, while with 5% biochar prepared at 400ºC. Further application of this biochar caused a significant biomass increase and a Cd content decrease of cabbage (P<0.05). Notably, the cabbage biomass even increased to 573.58%. The application inhibited Cd migrations from the soil to the underground part and, successively, the overground part of the cabbage, leading to reduced bioaccumulation of Cd. With 5% biochar prepared at 400ºC, the maximum decrease of the Cd content reached up to 90% in the aboveground part and 70% in the underground part of cabbage, respectively. Hence, the investigation demonstrates that high-productivity HGN-derived biochar can be a good candidate for immobilizing Cd and reducing its bioaccumulation.

8

Gene expression profiles of various cytokines in mesenchymal stem cells derived from umbilical cord tissue and bone marrow following infection with human cytomegalovirus

38%

Li Q. , Yu P. , Wang W. , Zhang P. , Yang H. , Li S. , Zhang L.

Cellular and Molecular Biology Letters

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2014

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tom 19

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nr 1

EN

Mesenchymal stem cells (MSCs) have both multi-lineage differentiation potential and immunosuppressive properties, making them ideal candidates for regenerative medicine. However, their immunosuppressive properties potentially increase the risk of cancer progression and opportunistic infections. In this study, MSCs isolated from human umbilical cord blood (UCMSCs) and adult bone marrow (BMMSCs) were infected with human cytomegalovirus (HCMV). Cytopathic changes were observed 10 days post infection. PCR products amplified from genomic DNA and cDNA were used to confirm the HCMV infection of the UCMSCs and BMMSCs. Real-time PCR was conducted to quantify the expression of immunomodulatory molecules, including cytokines, chemokines, growth factors, adhesion molecules and cancer-related genes. Our results indicate high upregulation of the majority of these molecules, including many growth factors, tumor necrosis factor alpha, interleukin-8, interleukin-6 and interferon gamma. Adhesion molecules (VCAM-1, TCAM-1 and selectin-E) were downregulated in the infected UCMSCs and BMMSCs. Antibody chip array evaluation of cell culture media indicated that the growth factor secretion by UCMSCs and BMMSCs was greatly influenced (p < 0.001) by HCMV. The stimulation of MSCs with HCMV led to the activation of downstream signaling pathways, including pSTAT3 and Wnt2. Our results show that HCMV can significantly alter the functions of both UCMSCs and BMMSCs, although not in the same way or to the same extent. In both cases, there was an increase in the expression of proangiogenic factors in the microenvironment following HMCV infection. The discrepancy between the two cell types may be explained by their different developmental origin, although further analysis is necessary. Future studies should decipher the underlying mechanism by which HCMV controls MSCs, which may lead to the development of new therapeutic treatments.