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8 results on '"Song, F. B."'

1. Efficient and robust analysis of complex scattering data under noise in microwave resonators

Author

Probst, S., Song, F. B., Bushev, P. A., Ustinov, A. V., and Weides, M.

Subjects
Condensed Matter - Superconductivity, Physics - Instrumentation and Detectors
Abstract

Superconducting microwave resonators are reliable circuits widely used for detection and as test devices for material research. A reliable determination of their external and internal quality factors is crucial for many modern applications, which either require fast measurements or operate in the single photon regime with small signal to noise ratios. Here, we use the circle fit technique with diameter correction and provide a step by step guide for implementing an algorithm for robust fitting and calibration of complex resonator scattering data in the presence of noise. The speedup and robustness of the analysis are achieved by employing an algebraic rather than an iterative fit technique for the resonance circle., Comment: 7 pages, 7 figures

Published
2014
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4. Soil microbial community and activity are affected by integrated agricultural practices in China

Author

Zhu, X. C., Sun, L. Y., Song, F. B., Liu, S. Q., Liu, Fulai, Li, X. N., Zhu, X. C., Sun, L. Y., Song, F. B., Liu, S. Q., Liu, Fulai, and Li, X. N.

Abstract

Sustainable agricultural management practices improve soil processes, prevent soil erosion and consequently enhance crop productivity. The integrated agricultural practice (IP) developed in northeast China, by altering row spacing of planting, adopting no-tillage and returning all crop residues, showed great benefit in sustaining crop yield. However, its effect on the soil microbiome remains largely elusive. This study evaluated the effect of 12-year integrated agricultural practice on the structure and activity of the soil microbial community at different soil depths in China's Mollisols zone. The experiment consisted of integrated agricultural practice and conventional practice (CP) treatments in a split-plot arrangement. The soil microbial community was characterized by MiSeq sequencing. The results showed that agricultural practices affected 12 phyla, 24 classes, 32 orders and 75 families in the bacterial community and one phyla, four classes, 12 orders and 18 families in the fungal community. Integrated agricultural practice resulted in greater bacterial richness and diversity, and increased the relative abundances of Actinobacteria, Gemmatimonadetes, Verrucomicrobia and Ascomycota, but reduced Bacteroidetes, Firmicutes and Basidiomycota in the dominant bacterial and fungal phyla. These findings suggested that integrated agricultural practice modified the soil physiochemical properties and consequently altered microbial community structure and diversity, which in turn affected soil microbial biomass and enzyme activities. These changes under integrated agricultural practice could have contributed to the enhanced crop yield, suggesting that IP is a sustainable agricultural practice. Highlights: How does soil microbial community change in the IP and CP soils? IP affected the soil microbial community and activity. Bacterial and fungal community structure correlated significantly with soil physiochemical properties. IP is a promising sustainable agricultural pra

Published
2018

6. A rutile precursor method to prepare Pb(Mg1/3Nb2/3)O3-PbTiO3 powders.

Author

Song, F. B., Li, Q., Li, C. H., Zhao, S. X., and Shen, D. Z.

Subjects
*LEAD compounds, *NIOBATES, *TITANATES, *DIELECTRIC measurements, *PIEZOELECTRIC materials, *PEROVSKITE
Abstract

The article reports that lead magnesium niobate-lead titanate (PMN-PT) has been widely investigated for its excellent dielectric and piezoelectric properties, which makes it an ideal material for applications in multiplayer ceramic capacitors, piezoelectric transducers and solid-state actuators. The pure perovskite PMN-PT powders can be obtained at the temperature of 750 degrees by the rutile precursor method. The phase formation and stability were measured by a simultaneous thermogravimetric analysis and differential thermal analysis.

Published
2004
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7. Association between a single nucleotide polymorphism in the bovine chemerin gene and carcass traits in Qinchuan cattle.

Author

Tian WQ, Wang HC, Song FB, Zan LS, Wang H, Wang HB, Xin YP, and Ujan JA

Subjects
Animals, Breeding, China, Genetic Markers, Genotype, Skeleton, Body Size genetics, Cattle genetics, Chemokines genetics, Exons genetics, Polymorphism, Single Nucleotide, Quantitative Trait Loci physiology
Abstract

Qinchuan is a red or yellow draft and beef breed in China. In order to identify a predictor of carcass traits on the basis of associations between carcass traits and gene polymorphism, variation in the bovine chemerin gene was investigated using PCR-single-strand conformational polymorphism and DNA sequencing. An SNP of A868G located in exon 2 of the Bos taurus chemerin gene was detected in 716 samples of six breeds (Jiaxian red, Luxi, Nan yang, Qinchuan, Simmental and Luxi crossbred steers, and Xia'nan), all in China, and three genotypes (AA, AG and GG) were found. Based on the χ(2) test, the AA/AG/GG genotype frequencies of all six breeds were found to be in Hardy-Weinberg equilibrium. A possible association of A868G with some carcass traits was investigated in 106 Qinchuan cattle. Animals with the AG genotype were found to have significantly lower mean loin eye area and meat tenderness compared to those with the AA and GG genotypes. However, there was no significant association between any individual haplotype and backfat thickness, water holding capacity or marbling score. We suggest that A868G could be used as a molecular marker in marker-assisted selection for carcass traits.

Published
2011
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8. A novel SNP of the C/EBPα gene associated with superior meat quality in indigenous Chinese cattle.

Author

Wang H, Zan LS, Wang HB, and Song FB

Subjects
Adipocytes physiology, Alleles, Animals, Base Sequence, Breeding, China, Gene Frequency, Genotype, Meat, Phenotype, Quantitative Trait, Heritable, Sequence Analysis, DNA, Body Composition genetics, CCAAT-Enhancer-Binding Protein-alpha genetics, Cattle genetics, Polymorphism, Single Nucleotide
Abstract

CCAAT/enhancer-binding protein alpha (C/EBPα) is an essential transcriptional factor regulating the differentiation of adipocytes. We report a novel single nucleotide polymorphism (C271A) of the C/EBPα gene in six indigenous Chinese cattle breeds using PCR-SSCP and DNA sequencing methods. Allele frequencies were investigated and evaluated by the χ(2) test in 817 individuals; all populations were found to be in Hardy-Weinberg equilibrium. Gene heterozygosity, effective allele numbers and polymorphism information content of the C/EBPα locus varied from 0.50 to 0.54, 1.84 to 1.99 and 0.35 to 0.37, respectively. We also evaluated a potential association of the C/EBPα SNP with ultrasound traits in 555 individuals; individuals of the AA genotype had greater ultrasound backfat thickness than did genotype CC (0.36 versus 0.34 cm, P < 0.01); genotypes AA and CA had higher ultrasound marbling scores than did genotype CC (3.53, 3.52 versus 3.37, P < 0.05). Analysis based on meat quality data in another 204 Qinchuan cattle showed that animals with genotype AA had bigger loin eye areas than did genotype CA (87.10 versus 79.08 cm(2), P < 0.05). These results indicate that the C271A SNP of the C/EBPα gene could be used as a molecular marker for selecting beef cattle with superior carcass traits.

Published
2011
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