PROGRESS IN OCEANOGRAPHY
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2016
·
IF 3.512
Zhengchao Wu,Qian P. Li
This study reports the first comprehensive exploration of the spatial patterns of dissolved and particulate polyunsaturated aldehydes (PUAs), their physical and biological controlling factors, and their potential biogeochemical influences in the Pearl River Estuary (PRE) of the northern South China Sea (NSCS). High levels of total particulate PUAs (0–41 nM) and dissolved PUAs (0.10–0.37 nM) were observed with substantial spatial variation during an intense summer phytoplankton bloom outside the PRE mouth. We found the particulate PUAs strongly correlated with temperature within the high chlorophyll bloom, while showing a generally positive correlation with chlorophyll- a for the entire region. Additionally, the Si/N ratio significantly correlated with the particulate PUAs along the estuary suggesting the important role of silica on PUA production in this region. The dissolved PUAs counterparts exhibited a positive correlation with chlorophyll- a within the high chlorophyll bloom, but a negatively one with temperature outside, reflecting the essential bio-physical coupling effects on the dissolved PUAs distributions in the ocean. Biogeochemical implications of PUAs on the coastal ecosystem include not only the deleterious restriction of high PUAs-producing diatom bloom on copepod population, but also the profound influence of particulate PUAs on the microbial cycling of organic carbon in the NSCS.
研究领域:
海洋生物学
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生态学
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生物地球化学
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产品关联
DOI
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
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2021
·
IF 3.575
Zhimao Mai,Lin Wang,Qiqi Li,Yingting Sun,Si Zhang
The bacterium Gordonia sp. SCSIO19801, which could effectively utilize phenanthrene as the sole carbon source, was isolated from the seawater of the South China Sea. Its biodegradation characteristics, whole genome sequence, and biodegradation pathway were investigated. The phenanthrene biodegradation process of Gordonia sp. SCSIO19801 was estimated to be a first-order kinetic model with a k value of 0.26/day. Based on the identification of metabolites, utilization of probable intermediates, and genomics analysis of related genes, the degradation of phenanthrene by Gordonia sp. SCSIO19801 was proposed to occur via the salicylate metabolic pathway. This is the first report of a phenanthrene degradation pathway in Gordonia species. In addition, the Gordonia sp. SCSIO19801 could use other aromatic compounds as the sole source of carbon and energy. These characteristics indicate that Gordonia sp. SCSIO19801 can be utilized for developing effective methods for the biodegradation of petroleum hydrocarbons in marine environments.
研究领域:
微生物学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zhuling Shao,Yanli Wu,Chengxu Gu,Yuyang Ma
A novel polysaccharide, designated PS1–1, was isolated from the marine fungus P. sclerotiorum , which was obtained from a sponge found in the Xisha Islands of the South China Sea. PS1–1 was a heteropolysaccharide with a molecular weight of 7.66 kDa, and consisting of mannose, galactose, and a small amount of glucose in an approximate ratio of 8.35:2.07:1.0. Structural characterization via methylation analysis and NMR spectroscopy revealed that PS1–1 (7.66 kDa) consists of a backbone of →6)-α-D-Man p -(1 → and →2)-α-D-Man p -(1→, with side chains of →2)-β-D-Gal f -(1→, →2)-α-D-Man p -(1→, and α-D-Glc p -(1→), composed of mannose, galactose, and glucose in a ratio of 8.35:2.07:1.0. In high-fat diet and STZ-induced type 2 diabetic mice, PS1–1 significantly reduced fasting blood glucose, improved glucose tolerance, and alleviated insulin resistance (decreased HOMA-IR by 59.28 % in the high-dose group). It also ameliorated dyslipidemia (reducing TG, TC, LDL-C by 54–57 %) and oxidative stress (increasing SOD activity and T-AOC). These findings suggest that PS1–1 possesses promising therapeutic potential for the management of type 2 diabetes and may offer a basis for further development in diabetes treatment.
研究领域:
海洋生物技术
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微生物学
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生物化学
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药理学
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糖尿病研究
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2017
·Vol. 7
·期 63
·40020-40027
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IF 3.108
Rongrong Chen,Yakun Li,Liang Tang,Haocheng Yang,Zetong Lu,Jun Wang,Lianhe Liu,Kazunobu Takahashi
Marine fouling organisms have caused inconvenience to humans for a long time owing to their high vitality and great destructiveness. Self-polishing antifouling coatings are considered to be among the most effective antifouling technologies. In this study, zinc-based acrylate copolymers (ZnPs) were designed and synthesized using a bifunctional zinc acrylate monomer (ZnM) as a new self-polishing monomer, and three acrylate monomers (namely, methyl methacrylate, ethyl acrylate and 2-methoxyethyl acrylate) were used as comonomers. ZnPs that contained the new ZnM were characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy and gel permeation chromatography. Different antifouling coatings were prepared using the previously mentioned ZnPs as the matrix material, and their erosion properties were investigated using a lab rotor test. A field test of the prepared coatings at various geographical locations showed their excellent antifouling performance as they inhibited the settlement of barnacles in both the South China Sea for 9 months and in the Yellow Sea for at least 15 months. The results of this study highlight that the biocidal ZnP-based coatings are highly promising candidates for marine antifouling applications.
研究领域:
材料科学
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海洋生物学
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化学工程
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产品关联
DOI
高影响因子
Frontiers in Environmental Science
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2021
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IF 4.581
Jin Hui,Zhao Cheng,Yin Yi,Zheng Guangming,li Lichun,Shan Qi,Zhang Meiyu,Wei Linting,Shi Xiaona,Huang Heqing,Zhang Wenjing,Liu Shugui
A simple, sensitive, and simultaneous method was established and validated for the active clinical components of teicoplanin and ramoplanin in environmental water by LC-MS/MS coupled with cascade elution. Moreover, a cascade elution method, which was rapid, solvent-less, and high-extraction efficient was successfully proposed to realize the extraction and purification of seven targets in one step. Under optimized conditions, the method showed excellent linearity with the correlation coefficient (R2) ≥0.998 in the range of 1.0–100.0 ng L−1. Low matrix effects and good recoveries which ranged from 86 to 114% were reached with RSDs lower than 3.0% for most targets. The limits of detection and limit of quantification were 0.1–1.3 and 0.3–4.0 ng L−1, respectively. This method was successfully applied for the determination of teicoplanin and ramoplanin in water samples from the Pearl River and the South China Sea. TA2-2,3 was quantified in only one sample with the concentration of 8.0 ng L−1.
研究领域:
环境科学
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分析化学
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药物分析
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）