Journal of Oceanology and Limnology
·
2021
·Vol. 39
·期 5
·1622-1633
·
IF 1.265
Qu Yang,Xu Kuidong,Li Tao,Wang Maoyu,Zhong Huan,Chen Tianyu
The ocean is an important inventory of anthropogenic mercury (Hg), yet the history of anthropogenic Hg accumulation in the ocean remains largely unexplored. Deep-sea corals are an emerging archive of past ocean chemistry, which take in sinking or suspended particulate organic matter as their food sources. Such organic matter would exchange Hg with the local seawater before being consumed by the deep, sea corals. As such, the organics preserved in the coral skeleton may record the Hg evolution of the ambient seawater during the time of coral growth. Here, we report the first data on Hg concentrations variability of a deep-sea proteinaceous coral in the oligotrophic North Pacific at the water depth of 1 249 m, in attempt to understand the transfer of anthropogenic Hg into the deep Pacific ocean over the last seven centuries. We find that the Hg concentrations of different coral growth layers have remained relatively constant albeit with considerable short-term variability through time. The overall stable Hg concentration of the last seven centuries recorded in our sample suggests that anthropogenic pollution is not yet a clearly resolvable component in the deep oligotrophic North Pacific waters, in agreement with recent estimation from modelling works and observational studies of modern seawater profiles. As there is hardly an unambiguous way to separate anthropogenic Hg from the natural background based on recent seawater profiles, our historical data provide valuable information helping to understand the oceanic cycle of Hg through time.
研究领域:
海洋地球化学
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环境科学
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古气候学
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生物地球化学循环
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深海生态学
✓ 已验证
DOI
高影响因子
mBio
·
2024
·Vol. 15
·期 3
·
IF 5.1
Yilin Xiao,Luyao Gao,Zhiyong Li
Global warming is a key issue that causes coral bleaching mainly because of the thermosensitivity of zooxanthellae. Compared with the well-studied zooxanthellae Symbiodiniaceae in coral holobionts, we rarely know about other coral symbiotic algae, let alone their thermal tolerance. In this study, a zoochlorellae, Symbiochlorum hainanensis, isolated from the coral Porites lutea, was proven to have a threshold temperature of 38°C. Meanwhile, unique high-temperature tolerance mechanisms were suggested by integrated transcriptomics and real-time quantitative PCR, physiological and biochemical analyses, and electron microscopy observation. Under heat stress, S. hainanensis shared some similar response strategies with zooxanthellae Effrenium sp., such as increased ascorbate peroxidase, glutathione peroxidase, superoxide dismutase activities and chlorophyll a, thiamine, and thiamine phosphate contents. In particular, more chloroplast internal layered structure, increased CAT activity, enhanced selenate reduction, and thylakoid assembly pathways were highlighted for S. hainanensis’s high-temperature tolerance. Notably, it is the first time to reveal a whole selenate reduction pathway from SeO42− to Se2− and its contribution to the high-temperature tolerance of S. hainanensis. These unique mechanisms, including antioxidation and maintaining photosynthesis homeostasis, efficiently ensure the high-temperature tolerance of S. hainanensis than Effrenium sp. Compared with the thermosensitivity of coral symbiotic zooxanthellae Symbiodiniaceae, this study provides novel insights into the high-temperature tolerance mechanisms of coral symbiotic zoochlorellae S. hainanensis, which will contribute to corals’ survival in the warming oceans caused by global climate change.
研究领域:
海洋生物学
·
环境科学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-ANIMAL
·
2016
·Vol. 53
·期 2
·111-122
·
IF 0.971
Lu Qiongxuan,Liu Tao,Tang Xianming,Dong Bo,Guo Huarong
Coral has strong regeneration ability, which has been applied for coral production and biodiversity protection via tissue ball (TB) culture. However, the architecture, morphological processes, and effects of environmental factors on TB formation have not been well investigated. In this study, we first observed TB formation from the cutting tentacle of scleractinia coral Goniopora lobata and uncovered its inner organization and architecture by confocal microscopy. We then found that the cutting tentacle TB could self-organize and reform a solid TB (sTB) in the culture media. Using chemical drug treatment and dissection manipulation approaches, we demonstrated that the mechanical forces for bending and rounding of the cutting fragments came from the epithelial cells, and the cilia of epithelial cell played indispensable roles for the rounding process. Environmental stress experiments showed that high temperature, not CO 2 -induced acidification, affected TB and sTB formation. However, the combination of high temperature and acidification caused additional severe effects on sTB reformation. Our studies indicate that coral TB has strong regeneration ability and therefore could serve as a new model to further explore the molecular mechanism of TB formation and the effects of environmental stresses on coral survival and regeneration.
研究领域:
海洋生物学
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再生生物学
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生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2014
·
IF 1.61
Pengjun Zhao,Lei Wang,Liang Bian,Jinbao Xu,Aimin Chang,Xinqian Xiong,Fanglong Xu,Jiaqi Zhang
Three-dimensional hierarchical structure coral-like BaTiO 3 nanoparticles have been self-assembled by a facile one step hydrothermal method . Cetyltrimethyl ammonium bromide (CTAB), Ba(OH) 2 ·8H 2 O and tetrabutyl titanate have been used as precursors. The prepared BaTiO 3 exhibits cubic perovskite phase at room temperature, and the coral-like architecture is a micro-nano hiberarchy consisted of dendrimer-like structure and trunk-like structure. By adjusting the hydrothermal duration and the precursor substances, a surfactant induced mechanism is proposed to understand the self-assembly process. UV-vis measurement demonstrates that the as-prepared BaTiO 3 nanoparticles exhibit dozens of times overwhelming absorptive character compared to the ordinary nanospheres at ultraviolet band, which is benefited from the coral-like porous framework. Moreover, halogen anions( F − , Cl − , Br − , and I − ) have been chosen to adjust the coral-like BaTiO 3 physical properties. Results show the halogen doping produces distinct modulation effect on the grain size, UV-vis absorbance and photoluminescence properties of the materials. The coral-like BaTiO 3 nanoparticle and its halogen modified ramifications offer significant opportunities to develop nano-laser devices, photon detectors, photocatalyst based on BaTiO 3 perovskite materials.
研究领域:
材料科学
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纳米技术
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Hengdong Ren,Sheng Wang,Wei Lian,Jialin Ma,Yan Zhao,Yin Liu,Ling Bing Kong,Tian shu Zhang,Won-Chun Oh
Palygorskite (Pal) was used as frameworks to disperse Fe 3 O 4 and polyaniline (PANI) nanoparticles for the preparation of coral-like Pal-dispersed Fe 3 O 4 /PANI composites with improved electromagnetic absorption performance. The processing was a combination of hydrothermal synthesis and simple mechanical stirring. With increasing content of Pal, specific surface area of the Pal-dispersed Fe 3 O 4 /PANI composites was increased from 21.14 m 2 /g to 29.69 m 2 /g, while the composites exhibitd fluffy coral-like structure due to the cation exchange mechanism and rich silanol (Si-OH) group of Pal. Since various loss mechanisms and improved impedance matching , the Pal-dispersed Fe 3 O 4 /PANI displayed an optimal reflection loss of −62.45 dB and a broad effective absorption bandwidth of 5.05 GHz. Therefore, this work develops an inexpensive framework to disperse nanoparticles for electromagnetic absorption materials , while new application of Pal is proposed.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Tianjing Bao,Jian Ren,Yiyuan Wu,Yang Cao,Haobo Pan,Chunlin Deng
The repair of bone defects caused by osteosarcoma is still a significant clinical issue, and new scaffolds need to be developed to solve this problem. The ocean is a treasure trove for developing new biomedical materials, coral is widely thought to be suitable as a scaffold for bone implant material due to its porous structure and mechanical properties. Selenium is known for their antioxidant and antitumor effects, inducing tumor cell cycle arrest. In this study, we hydrothermally transformed corals to grow a hydroxyapatite layer on the scaffold surface (CHAp) and combined it with selenium to obtain selenium-doped scaffolds (Se-CHAp) without affecting the porous structure of the coral. The research successfully validates their biocompatibility and the antitumor efficacy against 143B osteosarcoma cells. The results indicate that the Se-CHAp scaffold yielded an obvious inhibitory effect on the proliferation of osteosarcoma cells, highlighting that it has huge prospects for application in biomedical technology.
研究领域:
生物医学工程
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材料科学
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肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 34
·11897-11903
·
IF 4
Ying Liu,Baoteng Li,Sailong Xu,Ying Guo
In this paper, highly dispersed hierarchical coral spheres of CeO2/ZnO have been constructed through a facile template-free hydrothermal strategy, followed by an annealing treatment. The resulting coral spheres exhibit enhanced activity for acetone sensing compared with CeO2 or ZnO as well as excellent cyclability and long-term stability. At the optimum working temperature of 245 °C, by controlling the ratio of Ce/Zn, the highest response of the coral spheres towards 100 ppm acetone is up to 145, which is about 5.5 times that of ZnO coral spheres. The significantly improved gas sensing activity may be ascribed to the well-dispersed and assembled CeO2 nanoparticles on the surface of ZnO coral spheres and the heterojunctions between CeO2 and ZnO, which produced abundant oxygen vacancies in the CeO2/ZnO coral spheres.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2025
·
IF 2.8
Zhen Lu,Yingjian Zeng,Zhongkang Zhang,Xiaonan Lu,Guangbin Shang
Sarcandra Glabra is used in the treatment of Immune thrombocytopenia (ITP) clinically. Extractions of Total Flavonoids from Sarcandra Glabra (ETFSG) can improve platelet count in vivo and in vitro. However, the underlying mechanisms of ETFSG on ITP remain unclear. This study aims to investigate the mechanisms of ETFSG in the treatment of ITP via metabolomics and network pharmacology. Specifically, the number of differentiated megakaryocytes and platelet count in ITP model rats can be enhanced by the administration of ETFSG. Untargeted plasma metabolomics analysis revealed that ETFSG regulates the metabolic disorders of amino acids metabolism, arachidonic acid metabolism, pyrimidine metabolism, and citrate cycle metabolism pathways in the ITP animal model. Metabolomics-based network pharmacology analysis suggests that the PI3K-AKT signaling pathway may be involved in ETFSG's promotion of megakaryocyte differentiation. Western blot results indicate that ETFSG increases the expression of P-PI3K and P-AKT. In summary, these findings lay the groundwork for further exploration of the underlying mechanisms.
研究领域:
药理学
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血液学
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系统生物学
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代谢组学
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植物化学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Fengtong Chang,Xiuran Yin,Hanye Ju,Yankun Zhang,Lianzheng Yin,Xueqing Zhou,Yujie Feng,Xiaoping Diao
Organic ultraviolet filters (OUVFs) have been widely used as functional ingredients of sunscreen products and have entered into marine ecosystems, particularly in tropical areas where solar UV radiation is strong. These chemicals, with their potential toxicity and ecological risk, have raised widespread concern for the protection of the fragile marine ecosystem of coral reefs. In this study, fourteen OUVFs were analyzed among 24 coral species, together with their habitats including seawater and sediment from the coastal coral reef regions of Hainan Island, South China Sea. Surprisingly, all of fourteen OUVFs were detected in each sample, indicating the wide distribution of OUVFs among sites and samples. Among the fourteen OUVFs, benzophenone-3 (BP-3) and 4-methylbenzylidene camphor (4-MBC) were the most abundant, with concentrations ranging from 35.3 to 75.6 and 38.3 to 61.4 ng/L in seawater, from 13.2 to 25.9 and 7.0 to 17.4 ng/g dw in sediment, and from 4.5 to 21.3 and 4.4 to 19.7 ng/g dw in corals, respectively. Analysis of OUVFs in 24 coral species pointed that OUVFs accumulation in corals is morphology dependent: the highest concentration of OUVFs was identified in Galaxea fascicularis with abundant of polyps and tentacles while the lowest levels of OUVFs were found in Porites mayeri (smooth or lobed surface). In corals, we found that these OUVFs accumulated, depending on the coral species and the types of OUVFs. The ecological risk assessment further indicated that BP-3, 4-MBC and BP-8 had posed risks to corals. In addition, significantly higher concentrations of OUVFs were observed in Sanya (a seaside tourist resort) than in the other sites, suggesting that tourist activity and use of sunscreen products are the key to high inputs of sunscreen agents into marine ecosystem. Overall, our study demonstrates a potential risk role for OUVFs in coral protection in tropical areas where coral bleaching events occur.
研究领域:
海洋生物学
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环境科学
·
生态毒理学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 17
·11908-11913
·
IF 3.9
Yunyan Li,Huilan Chen,Shuai Li,Luping Feng,Ziyi Wang,Di Wang,Qidong Wang,Hua Wang
Microplastics (MPs) as the formidable pollutants with high toxicity and difficult degradation may threaten the aquaculture industry and human health, making it highly necessary to develop the effective removal methods. In this article, Fe3O4 nanoparticles (NPs) were initially fabricated with mesoporous structure, but showing undesirable adsorption efficiencies for the adsorption of MPs (lower than 70%). Inspired by the reefs-rebuilding corals acting as the sinks for various marine pollutants like plastic, Fe3O4 NPs were coated further with adhesive polymerized dopamine (PDA) yielding Fe3O4@PDA absorbents. Unexpectedly, it was discovered that the corals-mimicking absorbents so formed could allow for the removal of MPs with dramatically enhanced efficiencies up to 98.5%, which is over about 30% higher than those of bare Fe3O4 NPs. Herein, the PDA shells might conduct the increased adhesion to MPs, presumably through the formation of hydrogen bonding, π–π stacking, and hydrophobic interactions. A fast (within 20 min) and stable adsorption of MPs can also be expected, in addition to the PDA-improved environmental storage of Fe3O4 NPs. Subsequently, the Fe3O4@PDA adsorbents were utilized to remove MPs from different water sources with high efficiencies, including pure water, suburban streams, village rivers, lake water, inner-city moats, and aquaculture water. Such a magnet-recyclable adsorbent may provide a new way for rapid, effective, and low-cost removal of MPs pollutants from various water systems.
研究领域:
环境科学
·
材料科学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yudong Song,Yang Zou,Qingquan Zhao,Xinjian Shi,Shengyan Yin,Zhenning Liu,Hang Sun
Continuous and dependable underwater motion monitoring and communication are crucial for ensuring the safety of swimming, divers and underwater workers. We have developed a coral-inspired piezoresistive electronic skin (Melamine sponge-poly(pyrrole)-polydimethylsiloxane, MS-ppy-PDMS e-skin) for motion monitoring and underwater communication. The microstructure of the coral-like poly(pyrrole) and the PDMS acting as “limestone” make MS-ppy-PDMS e-skin superhydrophobic, stable (up to 80,000 cycles and acid and alkali resistance), and sensitive over a wide pressure sensing range (1–2,000 kPa). Moreover, MS-ppy-PDMS e-skin exhibits remarkable breathability, photothermal antibacterial efficacy, and biocompatibility, thereby increasing the comfort of wear while maintaining its outstanding sensing functionality. MS-ppy-PDMS e-skin exhibited dependable electrical signals output in motion monitoring tests on land and underwater. Most crucially, the combination of underwater communication commands captured by MS-ppy-PDMS e-skin with a multilayer perceptron (MLP) neural network allows for rapid and precise analysis and recognition, achieving a 99.38% accuracy rate in identifying underwater communication commands. This enables the realization of intelligent perception function, and is expected to further advance the development of human brain-like cognitive systems. Overall, the coral bionic MS-ppy-PDMS e-skin demonstrates tremendous application potential in the fields of motion monitoring and underwater communication.
研究领域:
材料科学
·
生物医学工程
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tengfei Xu,Qingcai Chen,Huan Liu,Tong Sha,Wenhao Liu,Jingwen Cheng,Yukun Hu
Polyaniline (PANI) is one of the most potential materials as ammonia (NH 3 ) gas sensors owing to its reversible protonation and deprotonation nature. However, the detection limit and reversibility of pristine PANI nanomaterials need to be further improved to meet the requirements for high performance sensors under the premise of lower energy consumption and safety conditions in various fields. A trace sensor for NH 3 based on coral-like pristine PANI nanorods was successfully tailored via modified chemical oxidation polymerization. The distinctive coral-like structure of PANI nanorods facilitates the generation of more reactive active sites and interconnected carrier transport channels, which contribute to the performance of the sensor. The PANI sensor exhibits a sub-ppm detection limit (36 ppb) for NH 3 at 24 ℃, in addition to a favorable selectivity and excellent long-term stability properties. Furthermore, it was observed that the application of high relative humidity treatment facilitated the removal of the ammonium salts that had accumulated on the surface of the reacted PANI sensors, thereby restoring the fixed resistance to its initial value. The feasibility of the application of this sensor was demonstrated through monitoring the spoilage of fresh shrimp by means of an integrated circuit system. The findings demonstrated that the synthesized pristine PANI sensor exhibited notable advantages, rendering it a viable option for practical applications in the detection of NH 3 .
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）