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Article ; Online: Preparation of two types plant biochars and application in soil quality improvement.

Wang, Pengyuan / Wang, Shuping / Chen, Feijie / Zhang, Tianxu / Kong, Weijing

2023 Volume 906, Page(s) 167334

Abstract: Soil degradation is a global problem that endangers sustainable development. Biochar is a solid, stable, carbon-rich, and highly aromatic material prepared using plant feedstock with a rich pore structure, high specific surface area, and high capacity ... ...

Abstract	Soil degradation is a global problem that endangers sustainable development. Biochar is a solid, stable, carbon-rich, and highly aromatic material prepared using plant feedstock with a rich pore structure, high specific surface area, and high capacity for holding water and nutrients. This study selected two typical plant resource raw materials, Spartina alterniflora (P. australis) and Spartina alterniflora (S. alterniflora), to prepare biochar at different temperatures, and then investigated the effects of different raw materials and preparation temperatures on the biochar's characteristics. After re-activation treatment, soil improvement experiments were conducted under different carbon application rates. The prepared biochar was alkaline, and contained abundant oxygen-containing functional groups and nutrients (including C, N, Ca, Na, and Mg). Biochar addition had significant effects on the soil microbial community and soil enzyme activity. Finally, by calculating the membership function and factor weights, the various physicochemical and biological properties of the soil were quantified in the form of soil quality indices. The results showed that biochar application had a significant promoting effect on soil quality, mainly through providing rich nutrient sources, enhancing the soil cation exchange capacity and therefore the nutrient effectiveness, and increasing the ability of soil to retain nutrients. The application of biochar (different types) has changed the original nutrient composition, microbial community, and enzyme activity of the soil, and under the combined action of these factors, the soil quality index (SQI) has been improved. This study provides a feasible soil fertility improvement strategy.
MeSH term(s)	Soil/chemistry ; Quality Improvement ; Charcoal/chemistry ; Carbon/chemistry
Chemical Substances	biochar ; Soil ; Charcoal (16291-96-6) ; Carbon (7440-44-0)
Language	English
Publishing date	2023-09-23
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.167334
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Article ; Online: Individual and combined toxicity of sulfamethoxazole and desethylatrazine to Chlorella vulgaris: growth inhibition, photosynthetic activity and oxidative stress

Zhang, Tianxu / Song, Yan / Xu, Weiying / Lu, Nannan / Chen, Yan / Jia, Ruibao / Sun, Shaohua

Chemistry and Ecology. 2023 Apr. 21, v. 39, no. 4 p.337-356

2023

Abstract: The influence of emerging contaminants on the composition of aquatic ecosystems, including antibiotics and pesticide metabolites, is receiving increasing attention. In this study, the acute and chronic toxic effects of single and combined exposure to ... ...

Abstract	The influence of emerging contaminants on the composition of aquatic ecosystems, including antibiotics and pesticide metabolites, is receiving increasing attention. In this study, the acute and chronic toxic effects of single and combined exposure to sulfamethoxazole (SMX) and desethylatrazine (DEA) on Chlorella vulgaris (C. vulgaris) were evaluated in terms of growth, pigment content and antioxidant systems. The findings demonstrated that cytochrome content and cell growth followed a similar trend for both single and combined exposures, with C. vulgaris being affected in a dose-dependent manner, and chlorophyll content decreasing at high exposures. For SMX and DEA, the maximum inhibition rates at a single exposure were 95.14% and 87.31%, respectively. Cell membrane permeability, superoxide dismutase content and catalase release were significantly increased in the early stages of cultivation. Additionally, cell density was used to calculate the single exposure half effect concentration (EC₅₀), which was then used as part of the toxic unit (TU) method for evaluating mixture interactions. TU analysis revealed that the interaction between SMX and DEA shifted from being synergistic to being antagonistic after 7 d of incubation. These results suggest that SMX and DEA may play a significant role in aquatic ecosystems.
Keywords	Chlorella vulgaris ; antioxidants ; catalase ; cell growth ; chemistry ; chlorophyll ; deethylatrazine ; dose response ; ecology ; growth retardation ; membrane permeability ; oxidative stress ; pesticide metabolites ; photosynthesis ; sulfamethoxazole ; superoxide dismutase ; toxicity ; desethylatrazine ; mixture toxicology ; microalgae
Language	English
Dates of publication	2023-0421
Size	p. 337-356.
Publishing place	Taylor & Francis
Document type	Article ; Online
ZDB-ID	2038286-8
ISSN	1029-0370 ; 0275-7540
ISSN (online)	1029-0370
ISSN	0275-7540
DOI	10.1080/02757540.2023.2189893
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Intrinsic mechanisms for the inhibition effect of graphene oxide on the catalysis activity of alpha amylase

Liu, Xinwei / Sun, Binbin / Xu, Chunyi / Zhang, Tianxu / Zhang, Yinqing / Zhu, Lingyan

Journal of Hazardous Materials. 2023 July, v. 453, p. 131389

2023 , Page(s) 131389

Abstract: Comprehending the interactions between graphene oxide (GO) and enzymes is critical for understanding the toxicities of GO. In this study, the inherent interactions of GO with α-amylase as a typical enzyme, and the impacts of GO on the conformation and ... ...

Abstract	Comprehending the interactions between graphene oxide (GO) and enzymes is critical for understanding the toxicities of GO. In this study, the inherent interactions of GO with α-amylase as a typical enzyme, and the impacts of GO on the conformation and biological activities of α-amylase were systematically investigated. The results reveal that GO formed ground-state complex with α-amylase primarily via hydrogen bonding and van der Waals interactions, thus quenching the intrinsic fluorescence of the protein statically. Particularly, the strong interactions altered the microenvironment of tyrosine and tryptophan residues, caused rearrangement of polypeptide structure, and reduced the contents of α-helices and β-sheets, thus changing the conformational structure of α-amylase. According to molecular docking results, GO binds with the amino acid residues (i.e., His299, Asp300, and His305) of α-amylase mainly through hydrogen bonding, which is in accordance with in vitro incubation experiments. As a consequence, the ability of α-amylase to catalyze starch hydrolysis into glucose was depressed by GO, suggesting that GO might cause dysfunction of α-amylase. This study discloses the intrinsic binding mechanisms of GO with α-amylase and provides novel insights into the adverse effects of GO as it enters organisms.
Keywords	alpha-amylase ; catalytic activity ; fluorescence ; glucose ; graphene oxide ; hydrogen ; hydrolysis ; polypeptides ; starch ; tryptophan ; tyrosine ; van der Waals forces ; α-amylase ; Binding interaction ; Conformational structure ; Biological activity
Language	English
Dates of publication	2023-07
Size	p. 131389
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2023.131389
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Book ; Conference proceedings: Automatic target recognition and navigation

Zhang, Tianxu

MIPPR 2013 ; 26 - 28 October 2013, Wuhan, China ; [part of the Eighth Symposium on Multispectral Image Processing and Pattern Recognition]

(Proceedings of SPIE ; 8918)

2013

Institution	Huazhong-Keji-Daxue
Event/congress	Automatic target recognition and navigation (2013.10.26-28, Wuhan) ; MIPPR (8, 2013.10.26-28, Wuhan) ; Symposium on Multispectral Image Processing and Pattern Recognition (8, 2013.10.26-28, Wuhan)
Author's details	organized by Huazhong University of Science and Technology (China). Tianxu Zhang ..., ed
Series title	Proceedings of SPIE ; 8918
Keywords	Image processing ; Multispectral photography ; Remote sensing
Language	English
Size	Getr. Zählung, [ca. 340] S., Ill., graph. Darst.
Publisher	SPIE
Publishing place	Bellingham, Wash
Document type	Book ; Conference proceedings
Note	Literaturangaben
ISBN	9780819498038 ; 0819498033
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Article ; Online: Microeukaryotic plankton community dynamics under ecological water replenishment: Insights from eDNA metabarcoding.

Wang, Shuping / Gu, Songsong / Zhang, Yaqun / Deng, Ye / Qiu, Wenhui / Sun, Qianhang / Zhang, Tianxu / Wang, Pengyuan / Yan, Zhenguang

Environmental science and ecotechnology

2024 Volume 20, Page(s) 100409

Abstract: Ecological water replenishment (EWR) is an important strategy for river restoration globally, but timely evaluation of its ecological effects at a large spatiotemporal scale to further adjust the EWR schemes is of great challenge. Here, we examine the ... ...

Abstract	Ecological water replenishment (EWR) is an important strategy for river restoration globally, but timely evaluation of its ecological effects at a large spatiotemporal scale to further adjust the EWR schemes is of great challenge. Here, we examine the impact of EWR on microeukaryotic plankton communities in three distinct river ecosystems through environmental DNA (eDNA) metabarcoding. The three ecosystems include a long-term cut-off river, a short-term connected river after EWR, and long-term connected rivers. We analyzed community stability by investigating species composition, stochastic and deterministic dynamics interplay, and ecological network robustness. We found that EWR markedly reduced the diversity and complexity of microeukaryotic plankton, altered their community dynamics, and lessened the variation within the community. Moreover, EWR disrupted the deterministic patterns of community organization, favoring dispersal constraints, and aligning with trends observed in naturally connected rivers. The shift from an isolated to a temporarily connected river appeared to transition community structuring mechanisms from deterministic to stochastic dominance, whereas, in permanently connected rivers, both forces concurrently influenced community assembly. The ecological network in temporarily connected rivers post-EWR demonstrated significantly greater stability and intricacy compared to other river systems. This shift markedly bolstered the resilience of the ecological network. The eDNA metabarcoding insights offer a novel understanding of ecosystem resilience under EWR interventions, which could be critical in assessing the effects of river restoration projects throughout their life cycle.
Language	English
Publishing date	2024-03-07
Publishing country	Netherlands
Document type	Journal Article
ISSN	2666-4984
ISSN (online)	2666-4984
DOI	10.1016/j.ese.2024.100409
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Transformation of 6:6 PFPiA in the gut of Xenopus laevis: Synergistic effects of CYP450 enzymes and gut microflora.

Zhang, Tianxu / Lyu, Yang / Yuan, Meng / Liu, Menglin / Zhu, Yumin / Sun, Binbin / Zhong, Wenjue / Zhu, Lingyan

Journal of hazardous materials

2024 Volume 472, Page(s) 134535

Abstract: As a frequently detected per- and polyfluoroalkyl substance in the environment, 6:6 perfluoroalkylhypophosphinic acid (6:6 PFPiA) is vulnerable to transformation in the liver of organisms, but the transformation in gut is still unclear. This study ... ...

Abstract	As a frequently detected per- and polyfluoroalkyl substance in the environment, 6:6 perfluoroalkylhypophosphinic acid (6:6 PFPiA) is vulnerable to transformation in the liver of organisms, but the transformation in gut is still unclear. This study investigates the molecular mechanisms of 6:6 PFPiA transformation in the gut of Xenopus laevis upon a 28-day exposure in water. Before Day 16, a notable correlation (p = 0.03) was observed between the transformation product (PFHxPA) and cytochrome P450 (CYP450) enzyme concentration in gut. This suggests that CYP450 enzymes played an important role in the transformation of 6:6 PFPiA in the gut, which was verified by an in vitro incubation with gut tissues, and supported by the molecular docking results of 6:6 PFPiA binding with CYP450 enzymes. From the day 16, the CYP450 concentration in gut decreased by 31.3 % due to the damage caused by 6:6 PFPiA, leading to a decrease in the transformation capacity in gut, but the transformation rate was stronger than in liver. This was in contrast with the in vitro experiment, where transformation was stronger in liver. In the mean time, the abundance of Bacteroidota in gut increased, which released hydrolytic enzyme and then could participate in the transformation as well. This study reveals the potential of the gut in metabolizing environmental pollutants, and provides profound insights into the potential health risks caused by 6:6 PFPiA in organisms.
Language	English
Publishing date	2024-05-06
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2024.134535
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Article ; Online: Novel Insights on 6:6 Perfluoroalkyl Phosphonic Acid-Induced Melanin Synthesis Disorders Leading to Pigmentation in Tadpoles.

Zhang, Tianxu / Zhu, Lingyan / Sun, Yumeng / Yang, Liping / Yi, Shujun / Zhong, Wenjue

Environmental science & technology

2023 Volume 57, Issue 30, Page(s) 11032–11042

Abstract: As alternatives to traditional per- and polyfluoroalkyl substances, perfluoroalkyl phosphonic acids (PFPiAs) are widely present in aquatic environments and can potentially harm aquatic organisms. Pigmentation affects the probability of aquatic organisms ... ...

Abstract	As alternatives to traditional per- and polyfluoroalkyl substances, perfluoroalkyl phosphonic acids (PFPiAs) are widely present in aquatic environments and can potentially harm aquatic organisms. Pigmentation affects the probability of aquatic organisms being preyed on and serves as an important toxic endpoint of development, but little is known about the impacts of PFPiAs on the development of aquatic organisms. In this study,
MeSH term(s)	Melanins/metabolism ; Phosphorous Acids ; Molecular Docking Simulation ; Pigmentation ; Fluorocarbons
Chemical Substances	Melanins ; phosphonic acid (13598-36-2) ; Phosphorous Acids ; Fluorocarbons
Language	English
Publishing date	2023-07-19
Publishing country	United States
Document type	Journal Article
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.3c02920
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Article ; Online: Novel Insight into the Mechanisms of Neurotoxicity Induced by 6:6 PFPiA through Disturbing the Gut-Brain Axis.

Zhang, Tianxu / Zhao, Sujuan / Dong, Fengfeng / Jia, Yibo / Chen, Xin / Sun, Yumeng / Zhu, Lingyan

Environmental science & technology

2023 Volume 57, Issue 2, Page(s) 1028–1038

Abstract: As alternatives to traditional per- and polyfluoroalkyl substances, perfluoroalkyl phosphonic acids (PFPiAs) are frequently detected in aquatic environments, but the neurotoxic effects and underlying mechanisms remain unclear. In this study, male ... ...

Abstract	As alternatives to traditional per- and polyfluoroalkyl substances, perfluoroalkyl phosphonic acids (PFPiAs) are frequently detected in aquatic environments, but the neurotoxic effects and underlying mechanisms remain unclear. In this study, male zebrafish were exposed to 6:6 PFPiA (1 and 10 nM) for 28 days, which exhibited anxiety-like symptoms. Gut microbiome results indicated that 6:6 PFPiA significantly increased the abundance of Gram-negative bacteria, leading to enhanced levels of lipopolysaccharide (LPS) and inflammation in the gut. The LPS was delivered to the brain through the gut-brain axis (GBA), damaged the blood-brain barrier (BBB), stimulated neuroinflammation, and caused apoptosis as well as neural injury in the brain. This mechanism was verified by the fact that antibiotics reduced the LPS levels in the gut and brain, accompanied by reduced inflammatory responses and anxiety-like behavior. The BBB damage also resulted in the enhanced accumulation of 6:6 PFPiA in the brain, where it might bind strongly with and activate aryl hydrocarbon receptor (AhR) to induce brain inflammation directly. Additionally, as the fish received treatment with an inhibitor of AhR, the inflammation response and anxiety-like behavior decreased distinctly. This study sheds light on the new mechanisms of neurotoxicity-induced 6:6 PFPiA due to the interruption on GBA.
MeSH term(s)	Animals ; Male ; Brain-Gut Axis ; Gastrointestinal Microbiome ; Inflammation ; Lipopolysaccharides ; Zebrafish ; Phosphorous Acids/toxicity
Chemical Substances	Lipopolysaccharides ; Phosphorous Acids
Language	English
Publishing date	2023-01-03
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.2c04765
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Article ; Online: Adaptive anisotropic pixel-by-pixel correction method for a space-variant degraded image.

Hong, Hanyu / Zuo, Zhichao / Shi, Yu / Hua, Xia / Xiong, Lun / Zhang, Yaozong / Zhang, Tianxu

Journal of the Optical Society of America. A, Optics, image science, and vision

2023 Volume 40, Issue 9, Page(s) 1686–1697

Abstract: Large field-of-view optical imaging systems often face challenges in the presence of space-variant degradation. The existence of degradation leads to target detection and recognition being difficult or even unsuccessful. To address this issue, this paper ...

Abstract	Large field-of-view optical imaging systems often face challenges in the presence of space-variant degradation. The existence of degradation leads to target detection and recognition being difficult or even unsuccessful. To address this issue, this paper proposes an adaptive anisotropic pixel-by-pixel space-variant correction method. First, we estimated region acquisition of local space-variant point spread functions (PSFs) based on Haar wavelet degradation degree distribution, and obtained initial PSF matrix estimation with inverse distance weighted spatial interpolation. Then, we established a pixel-by-pixel space-variant correction model based on the PSF matrix. Third, we imposed adaptive sparse regularization terms of the Haar wavelet based on the adaptive anisotropic iterative reweight strategy and non-negative regularization terms as the constraint in the pixel-by-pixel space-variant correction model. Finally, as the correction process is refined to each pixel, the split-Bregman multivariate separation solution algorithm was employed for the pixel-by-pixel spare-variant correction model to estimate the final PSF matrix and the gray value of each pixel. Through this algorithm, the "whole image correction" and "block correction" is avoided, the "pixel-by-pixel correction" is realized, and the final corrected images are obtained. Experimental results show that compared with the current advanced correction methods, the proposed approach in the space-variant wide field correction of a degraded image shows better performance in preserving the image details and texture information.
Language	English
Publishing date	2023-09-14
Publishing country	United States
Document type	Journal Article
ZDB-ID	283633-6
ISSN	1520-8532 ; 1084-7529 ; 0740-3232
ISSN (online)	1520-8532
ISSN	1084-7529 ; 0740-3232
DOI	10.1364/JOSAA.490150
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Article ; Online: Underlying Mechanisms for the Sex- and Chemical-Specific Hepatotoxicity of Perfluoroalkyl Phosphinic Acids in Common Carp (

Liu, Menglin / Yi, Shujun / Yu, Hao / Zhang, Tianxu / Dong, Fengfeng / Zhu, Lingyan

Environmental science & technology

2023 Volume 57, Issue 39, Page(s) 14515–14525

Abstract: The hepatotoxicities of perfluoroalkyl and polyfluoroalkyl substances (PFASs) have been extensively investigated, while little is known about the sex-specific differences. In this study, common carp were exposed to the emerging perfluoroalkyl phosphinic ... ...

Abstract	The hepatotoxicities of perfluoroalkyl and polyfluoroalkyl substances (PFASs) have been extensively investigated, while little is known about the sex-specific differences. In this study, common carp were exposed to the emerging perfluoroalkyl phosphinic acids (6:6 and 8:8 PFPiAs) for 14 days to disclose sex-specific hepatotoxicity. Apparent hepatotoxicity, including cell necrosis, apoptosis, and steatosis, was observed in both male and female carp liver. The observed hepatocyte steatosis was predominantly attributed to the dysregulation of hepatic lipid metabolism but was based on sex-specific mechanisms. It was manifested as inhibited oxidative decomposition of fatty acids (FAs) in the female liver, whereas it enhanced the uptake of FAs into the male liver, both of which led to excessive lipid accumulation. Untargeted lipidomics validated that the metabolism pathways of FA, sphingolipid, glycerolipid, and glycerophospholipid were disrupted by both compounds, leading to the generation of reactive oxygen species and oxidative stress. The oxidative stress further evolved into inflammation, manifested as promoted expression of proinflammatory cytokines and repressed expression of anti-inflammatory cytokines. Consistently, all of the changes were more noticeable in male carp, suggesting that male fish were more susceptible to PFPiA disruption. 8:8 PFPiA was less accumulated but caused stronger hepatotoxicity than 6:6 PFPiA, possibly because of the stronger binding capacity of 8:8 PFPiA to nuclear transcription factors mediating lipid metabolism and inflammation. The findings of this study highlight the significance of sex- and chemical-dependent bioaccumulation and the toxicity of PFASs in organisms.
MeSH term(s)	Male ; Animals ; Female ; Phosphinic Acids ; Carps/metabolism ; Cytokines ; Inflammation ; Fluorocarbons/toxicity ; Chemical and Drug Induced Liver Injury ; Water Pollutants, Chemical/metabolism
Chemical Substances	Phosphinic Acids ; Cytokines ; Fluorocarbons ; Water Pollutants, Chemical
Language	English
Publishing date	2023-09-20
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.3c04964
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