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12 results on '"Shen Zhiguo"'

5. The red flower wintersweet genome provides insights into the evolution of magnoliids and the molecular mechanism for tepal color development

Author

Meilan Liu, Heping Cao, Deyi Yuan, Lin Zhang, Tang Zhenghui, Sun Meng, Changping Yue, Yanli Li, Nicholas J. Provart, Wenying Li, Ding Xin, Shen Zhiguo, and Yunpeng Cao

Subjects
Calycanthaceae, Chimonanthus praecox, Flowers, Plant Science, Genome, Anthocyanins, Magnoliids, Gene Expression Regulation, Plant, Genetics, Frameshift Mutation, Phylogeny, Plant Proteins, Long branch attraction, Whole Genome Sequencing, biology, Phylogenetic tree, Pigmentation, Laurales, Molecular Sequence Annotation, Cell Biology, biology.organism_classification, Evolutionary biology, Functional genomics, Genome, Plant, Transcription Factors
Abstract

Wintersweet (Chimonanthus praecox) is one of the most important ornamental plants, whose color is mainly determined by the middle tepals. However, the molecular mechanisms underlying the intriguing flower color development among different wintersweet groups are still largely unknown. In addition, wintersweet belongs to magnoliids, and the issue remains as to how to determine the phylogenetic position of magnoliids conclusively. Here, the whole genome of red flower wintersweet, a new wintersweet type, was sequenced and assembled with high-quality. The genome comprised 11 super-scaffolds (chromosomes) with a total size of 737.03 Mb. Based on the analyses of the long branch attraction (LBA), incomplete lineage sorting (ILS), sparse taxon sampling and other factors, we suggest that a bifurcating tree may not fully represent the complex early diversification of the angiosperms, and that magnoliids are most likely to be the sister of the eudicots. The wintersweet genome appears to have undergone two rounds of whole-genome duplication (WGD) events: a younger WGD event representing an independent event specific to the Calycanthaceae species; and an ancient WGD event shared by Laurales. By integrating genomic, transcriptomic, and metabolomic data, CpANS1 and transcription factor CpMYB1 were considered to play key roles in regulating tepal color development, whereas CpMYB1 needs to form a complex with bHLH and WD40 to fully perform its regulatory function. The present study not only provided novel insights into the evolution of magnoliids and the molecular mechanism for flower color development, but also laid the foundation for subsequent functional genomics study and molecular breeding of wintersweet.

Published
2021

6. Semi-supervised wildfire smoke detection based on smoke-aware consistency

Author

Universitat Politècnica de Catalunya. Doctorat en Automàtica, Robòtica i Visió, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial, Universitat Politècnica de Catalunya. VIS - Visió Artificial i Sistemes Intel·ligents, Wang, Chuansheng, Grau Saldes, Antoni, Guerra Paradas, Edmundo, Shen, Zhiguo, Hu, Jinxing, Fan, Haoyi, Universitat Politècnica de Catalunya. Doctorat en Automàtica, Robòtica i Visió, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial, Universitat Politècnica de Catalunya. VIS - Visió Artificial i Sistemes Intel·ligents, Wang, Chuansheng, Grau Saldes, Antoni, Guerra Paradas, Edmundo, Shen, Zhiguo, Hu, Jinxing, and Fan, Haoyi

Abstract

The semi-transparency property of smoke integrates it highly with the background contextual information in the image, which results in great visual differences in different areas. In addition, the limited annotation of smoke images from real forest scenarios brings more challenges for model training. In this paper, we design a semi-supervised learning strategy, named smokeaware consistency (SAC), to maintain pixel and context perceptual consistency in different backgrounds. Furthermore, we propose a smoke detection strategy with triple classification assistance for smoke and smoke-like object discrimination. Finally, we simplified the LFNet fire-smoke detection network to LFNet-v2, due to the proposed SAC and triple classification assistance that can perform the functions of some specific module. The extensive experiments validate that the proposed method significantly outperforms state-of-the-art object detection algorithms on wildfire smoke datasets and achieves satisfactory performance under challenging weather conditions., Peer Reviewed, Postprint (published version)

Published
2022

7. The red flower wintersweet genome provides insights into the evolution of magnoliids and the molecular mechanism for tepal color development

Author

Shen, Zhiguo, primary, Li, Wenying, additional, Li, Yanli, additional, Liu, Meilan, additional, Cao, Heping, additional, Provart, Nicholas, additional, Ding, Xin, additional, Sun, Meng, additional, Tang, Zhenghui, additional, Yue, Changping, additional, Cao, Yunpeng, additional, Yuan, Deyi, additional, and Zhang, Lin, additional

Published
2021
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8. Silica nanoparticles capture atmospheric lead: implications in the treatment of environmental heavy metal pollution

Author

Zhixiong Zhuang, Xifei Yang, Jianjun Liu, Jianping Yang, Bing Zhang, Wen-Xu Hong, and Shen Zhiguo

Subjects
Air Pollutants, China, Environmental Engineering, Chemistry, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Environmental pollution, General Medicine, General Chemistry, Contamination, Silicon Dioxide, Pollution, Adsorption, Lead, Specific surface area, Environmental chemistry, Air Pollution, Zeta potential, Environmental Chemistry, Particle, Nanoparticles, Particle size, Inductively coupled plasma mass spectrometry
Abstract

Lead (Pb) contamination in the air is a severe global problem, most notably in China. Removal of Pb from polluted air remains a significant challenge. It is unclear what potential effects silica nanoparticles (SiNPs) exposure can have on atmospheric Pb. Here we first characterized the features of SiNPs by measuring the particle size, zeta potential and the specific surface area of SiO(2) particles using a Nicomp 380/ZLS submicron particle sizer, the Brunauer-Emmett-Teller (BET) method and transmission electronic microscopy (TEM). We measured the content of the metal Pb adsorbed by SiNPs exposed to two Pb polluted electric battery plants using inductively coupled plasma mass spectrometry (ICP-MS). It is found that SiNPs exposed to two Pb polluted electric battery plants absorb more atmospheric Pb compared to either blank control or micro-sized SiO(2) particles in a time-dependent manner. This is the first study demonstrating that SiNPs exposure can absorb atmospheric Pb in the polluted environment. These novel findings indicate that SiNPs have potential to serve as a significant adsorbent of Pb from industrial pollution, implicating a potentially novel application of SiNPs in the treatment of environmental heavy metal pollution.

Published
2012

10. [Total arsenic in marine organisms determined by graphite furnace atomic absorption spectrometry].

Author

Jiang J, Qiu H, Zhang H, Liu G, Li X, and Shen Z

Subjects
Animals, Bivalvia chemistry, Fishes, Graphite chemistry, Aquatic Organisms chemistry, Arsenic analysis, Environmental Pollutants analysis, Spectrophotometry, Atomic methods
Abstract

Objective: To establish the method of total arsenic in marine organisms determined by graphite furnace atomic absorption spectrometry (GFAAS) in order to detect the contents of total arsenic in marine organisms around the coast of Guangdong Province., Methods: The marine organisms samples were digested by HNO3 in high-pressure closed-vessel, the contents of total arsenic were analyzed by GFAAS with PdCl2-NiNO3 as matrix modifier., Results: The calibration curve showed good linearity in the range of 0 - 40 microg/L with correlation coefficient of 0.997, the detection limits were 0.030 mg/kg and the precisions ranged from 3.7% to 5.1%, and the results of analyzing standard materials were in the certificate values. The contents of total arsenic ranged from 0.09 mg/kg to 12.58 mg/kg wet weight in the 99 tested samples and the average contents were 1.85 mg/kg., Conclusion: The interference of matrix could well be eliminated by the method which could be precise and accurate, the marine organisms around the coast of Guangdong Province were polluted by arsenic in different levels.

Published
2009

11. [Rare earth elements in marine organisms from Shenzhen coastal region].

Author

Zhang H, Deng L, Yang J, Jiang J, Shen Z, and Xie J

Subjects
Animals, China, Fishes, Mollusca chemistry, Thoracica chemistry, Aquatic Organisms chemistry, Environmental Pollutants analysis, Metals, Rare Earth analysis
Abstract

Objective: A sensitive quantificational method was set up to determine the rare earth elements (REE) in marine organisms from Shenzhen coastal region. Characteristics of REE contents and distribution patterns of REE were analyzed., Methods: A total of 60 samples of marine organisms were collected at six sampling sites in the Shenzhen coastal region. Concentrations of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Ho, Tm and Lu in the samples were determined by inductively coupled plasma-mass spectrometry (ICP-MS). The quantificational method was validated with standard reference material GBW 10016 (tea-leaf)., Results: The mean concentrations of total REE in mollusk, barnacle, shrimp and fish were (2.66 +/- 2.28), (4.69 +/- 1.32), (0.03 +/- 0.03) and (0.07 +/- 0.02) microg/g, respectively. Enrichment of light REE (LREE) over heavy REEs (HREE) were observed for all tested marine organisms., Conclusion: (1) The chondrite-normalized distribution of REE for mollusk, barnacle and shrimp showed a similar pattern with those of sediment in northern continent slopes of the South China Sea, soils of Hong Kong and the Mainland (mean), while small differences were observed for fish. (2) Consumers would be faced with risk to eat the bivalves. (3) Barnacle and oyster were suggested here as bio-marker for REE in marine environment due to the high potential of REE enrichment, similar chondrite-normalized distribution to marine sediment and adhering life style of the two kind of animals.

Published
2009

12. [Effect of the long-term intake of yttrium in drinking water on trace elements in F1 generation mice].

Author

Yang W, Liu J, Shen Z, and Wu C

Subjects
Animals, Female, Kidney metabolism, Liver metabolism, Male, Mice, Mice, Inbred Strains, Spleen metabolism, Yttrium administration & dosage, Brain metabolism, Trace Elements metabolism, Yttrium pharmacokinetics
Abstract

The effects of the long-term intake of yttrium on trace elements in tissues and yttrium in brain of F1 generation mice were studied so as to elucidate some physiological function of the rare earths. The mice were fed with Y3+ (0, 23.25 mg/L, 2325.00 mg/L) dissolved water at different levels for seven months. The level of trace elements such as Cu, Cd, Pb and Y in brain and Se in brain, liver, spleen and kidney of F1 generation mice were measured by ICP-MS and atom fluorescent method. The results showed that, compared with control mice, significant changes in content of Se (P < 0.05) in spleen and Y (P < 0.05) in brain were observed, but no changes were found in content of Pb, Cd, and Cu in brain for the high dose group, and an increase was detected in content of Se(P < 0.05) in spleen for the low dose group, suggesting that long-term intake of Y3+ might enhance the absorption of Se in some tissue that might be one of the biological effect of rare earth and, Y3+ might enter young mammalian brain.

Published
2003

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