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Article ; Online: Remarkable effects of greening watershed on reducing suspended sediment flux in China's major rivers.

Cao, Zhigang / Duan, Hongtao / Ma, Ronghua / Shen, Ming / Yang, Hong

2023 Volume 68, Issue 20, Page(s) 2285–2288

Language	English
Publishing date	2023-08-21
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2816140-3
ISSN	2095-9281 ; 2095-9273
ISSN (online)	2095-9281
ISSN	2095-9273
DOI	10.1016/j.scib.2023.08.036
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Tracing sediment sources in a plain river network area by using optimized experimental design and reflectance spectroscopy.

Xiong, Junfeng / Lin, Chen / Ma, Ronghua / Wu, Zhipeng / Chen, Lei

Water research

2023 Volume 250, Page(s) 121041

Abstract: Soil erosion in a plain river network area with dense rivers, fertile land, and agricultural development is easily causes river siltation, agricultural non-point source pollution, and water eutrophication. Therefore, the negative impact of the sediment ... ...

Abstract	Soil erosion in a plain river network area with dense rivers, fertile land, and agricultural development is easily causes river siltation, agricultural non-point source pollution, and water eutrophication. Therefore, the negative impact of the sediment on the environment cannot be underestimated. Most traditional sediment fingerprint tracing studies have focused on mountain basins and lack a scheme suitable for plain river network sediment tracing. Here, a typical plain river network in the Taihu Basin was selected as the study area. The flow structure and characteristics were analysed, and a sampling scheme for the stream segment and a two-step model of sediment tracing in a plain river network were proposed to quantitatively distinguish the types of sediment sources. The results indicated that the traditional discriminant function analysis adequately distinguishes the contribution rate of basin soil and has a good validation accuracy (R
MeSH term(s)	Research Design ; Geologic Sediments ; Soil ; Spectrum Analysis ; Water ; Environmental Monitoring/methods
Chemical Substances	Soil ; Water (059QF0KO0R)
Language	English
Publishing date	2023-12-19
Publishing country	England
Document type	Journal Article
ZDB-ID	202613-2
ISSN	1879-2448 ; 0043-1354
ISSN (online)	1879-2448
ISSN	0043-1354
DOI	10.1016/j.watres.2023.121041
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Article ; Online: Eutrophication evolution of lakes in China: Four decades of observations from space.

Hu, Minqi / Ma, Ronghua / Xue, Kun / Cao, Zhigang / Xiong, Junfeng / Loiselle, Steven Arthur / Shen, Ming / Hou, Xuan

Journal of hazardous materials

2024 Volume 470, Page(s) 134225

Abstract: The lake eutrophication is highly variable in both time and location, and greatly restricts the sustainable development of water resources. The lack of national eutrophication evaluation for multi-scale lakes limits the pertinent governance and ... ...

Abstract	The lake eutrophication is highly variable in both time and location, and greatly restricts the sustainable development of water resources. The lack of national eutrophication evaluation for multi-scale lakes limits the pertinent governance and sustainable management of water quality. In this study, a remote sensing approach was developed to capture 40-year dynamics of trophic state index (TSI) for nationwide lakes in China. 32% of lakes (N = 1925) in China were eutrophic and 26% were oligotrophic, and a longitudinal pattern was discovered, with the 40-year average TSI of 62.26 in the eastern plain compared to 23.72 in the Tibetan Plateau. A decreasing trend was further observed in the past four decades with a correlation of -0.16, which was mainly discovered in the Tibetan Plateau lakes (r > -0.90, p < 0.01). The contribution of climate change and human activities was quantified and varied between lake zones, with anthropogenic factors playing a dominant role in the east plain lakes (88%, N = 473) and large lakes are subject to a more complex driving mechanism (≥ 3 driving factors). The study expands the spatiotemporal scale for eutrophication monitoring and provides an important base for strengthening lake management and ecological services.
Language	English
Publishing date	2024-04-05
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.2024.134225
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Article ; Online: Detection of aberrant DNA methylation patterns in sperm of male recurrent spontaneous abortion patients.

Ma, Rong-Hua / Zhang, Zhen-Gang / Zhang, Yong-Tian / Jian, Sheng-Yan / Li, Bin-Ye

Zygote (Cambridge, England)

2023 Volume 31, Issue 2, Page(s) 163–172

Abstract: Aberrant DNA methylation patterns in sperm are a cause of embryonic failure and infertility, and could be a critical factor contributing to male recurrent spontaneous abortion (RSA). The purpose of this study was to reveal the potential effects of sperm ... ...

Abstract	Aberrant DNA methylation patterns in sperm are a cause of embryonic failure and infertility, and could be a critical factor contributing to male recurrent spontaneous abortion (RSA). The purpose of this study was to reveal the potential effects of sperm DNA methylation levels in patients with male RSA. We compared sperm samples collected from fertile men and oligoasthenospermia patients. Differentially methylated sequences were identified by reduced representation bisulfite sequencing (RRBS) methods. The DNA methylation levels of the two groups were compared and qRT-PCR was used to validate the expression of genes showing differential methylation. The results indicated that no difference in base distribution was observed between the normal group and the patient group. However, the chromosome methylation in these two groups was markedly different. One site was located on chromosome 8 and measured 150 bp, while the other sites were on chromosomes 9, 10, and X and measured 135 bp, 68 bp, and 136 bp, respectively. In particular, two genes were found to be hypermethylated in these patients, one gene was
MeSH term(s)	Female ; Pregnancy ; Humans ; Male ; DNA Methylation ; Semen ; Spermatozoa/metabolism ; Abortion, Habitual/genetics ; Abortion, Habitual/metabolism ; Semen Analysis
Language	English
Publishing date	2023-01-09
Publishing country	England
Document type	Journal Article
ZDB-ID	1166294-3
ISSN	1469-8730 ; 0967-1994
ISSN (online)	1469-8730
ISSN	0967-1994
DOI	10.1017/S0967199422000648
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Article: Comparison of the Hydrological Dynamics of Poyang Lake in the Wet and Dry Seasons

Sun, Fangdi / Ma, Ronghua / Liu, Caixia / He, Bin

Remote Sensing. 2021 Mar. 05, v. 13, no. 5

2021

Abstract: Poyang Lake is the largest freshwater lake connecting the Yangtze River in China. It undergoes dramatic dynamics from the wet to the dry seasons. A comparison of the hydrological changes between the wet and dry seasons may be useful for understanding the ...

Abstract	Poyang Lake is the largest freshwater lake connecting the Yangtze River in China. It undergoes dramatic dynamics from the wet to the dry seasons. A comparison of the hydrological changes between the wet and dry seasons may be useful for understanding the water flows between Poyang Lake and Yangtze River or the river system in the watershed. Gauged measurements and remote sensing datasets were combined to reveal lake area, level and volume changes during 2000–2020, and water exchanges between Poyang Lake and Yangtze River were presented based on the water balance equation. The results showed that in the wet seasons, the lake was usually around 1301.85–3840.24 km², with an average value of 2800.79 km². In the dry seasons, the area was around 618.82–2498.70 km², with an average value of 1242.03 km². The inundations in the wet seasons were approximately quadruple those in the dry seasons. In summer months, the lake surface tended to be flat, while in winter months, it was inclined, with the angles at around 10′′–16′′. The mean water levels of the wet and dry seasons were separately 13.51 m and 9.06 m, with respective deviations of around 0–2.38 m and 0.38–2.15 m. Monthly lake volume changes were about 7.5–22.64 km³ and 1–5.80 km³ in the wet and dry seasons, respectively. In the wet seasons, the overall contributions of ground runoff, precipitation on the lake surface and lake evaporation were less than the volume flowing into Yangtze River. In the dry seasons, the three contributions decreased by 50%, 50% and 65.75%, respectively. Therefore, lake storages presented a decrease (−7.42 km³/yr) in the wet seasons and an increase (9.39 km³/yr) in the dry seasons. The monthly exchanges between Poyang Lake and Yangtze River were at around −14.22–32.86 km³. Water all flowed from the lake to the river in the wet seasons, and the chance of water flowing from Yangtze River in the dry seasons was only 5.26%.
Keywords	data collection ; equations ; evaporation ; freshwater lakes ; rivers ; runoff ; summer ; watersheds ; China ; Yangtze River
Language	English
Dates of publication	2021-0305
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
Note	NAL-light
ZDB-ID	2513863-7
ISSN	2072-4292
ISSN	2072-4292
DOI	10.3390/rs13050985
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Study on the preparation method of porous membranes with single pore size distribution and tailored pore sizes by the induced swelling effect of pre-set graft side chains

Liu, Chao / Lu, Xiaolong / Ma, Ronghua / Gu, Jie / Ren, Kai / Zheng, Shuyun / Zhang, Shaozhe / Liu, Ziqiang

Journal of Membrane Science. 2023 Nov., v. 685 p.121902-

2023

Abstract: To improve the sieving accuracy of material separation, it is necessary to develop a porous membrane with tailored pore size and narrow pore size distribution. Polyvinylidene fluoride (PVDF), the mainstream membrane material, is a semi-crystalline ... ...

Abstract	To improve the sieving accuracy of material separation, it is necessary to develop a porous membrane with tailored pore size and narrow pore size distribution. Polyvinylidene fluoride (PVDF), the mainstream membrane material, is a semi-crystalline polymer. On the basis of the high elastic state of the PVDF molecular chain in the amorphous region at room temperature, a novel method was proposed to prepare porous membranes with single pore size distribution and tailored pore sizes in this paper. First, 1,3-bis (tris(hydroxymethyl)methylamino) propane (Bis-Tris propane) was grafted onto the PVDF-CTFE main chain during casting solution preparation, and the membranes with the thin and nonporous skin layers were prepared by non-solvent-induced phase separation (NIPS), which had almost no water flux. The membrane with the nonporous skin layer produced a water flux of 35.3 L ∙ m⁻²∙ h⁻¹∙ bar⁻¹ after soaking in the alkaline glycine solution. FTIR and EDX tests demonstrated that small molecular glycine can be guided into the membrane matrix by the affinity with the polar groups on the pre-set side chains, inducing the reactive swelling effect, which led to the formation of new through holes. Subsequently, the membrane with the nonporous skin layer was initially soaked in ethanol to form pores in advance, then the induced reactive swelling of pre-set graft side chains was carried out. The water flux of obtained membrane was significantly up to 96.9 L ∙ m⁻²∙ h⁻¹∙ bar⁻¹, proving that the pre-pore forming process successfully strengthened the reactive swelling-caused pore generation effect. Furthermore, based on the enhanced swelling-caused pore generation strategy, amino acids with different molecular sizes were induced to the reactive swelling effect in the amorphous regions. The mathematical fitting showed a linear correlation between the average pore size of the membrane and the molar hydration volume of amino acids, and the membrane was single pore size distribution, verifying that controllably tailored membrane pore size can be realized by the reactive swelling effect of the reactive small molecule with different molecular sizes. Compared to some membranes with single pore size distribution prepared by track etching and anodic oxidation method, the membranes prepared by this method had higher water flux. The water contact angle result clarified that the membrane surfaces and pore channels had excellent hydrophilicity. The reactive swelling did not change the crystallinity and porosity, so the mechanical strength of the membrane did not deteriorate.
Keywords	ambient temperature ; contact angle ; crystal structure ; ethanol ; hydrophilicity ; oxidation ; porosity ; propane ; separation ; strength (mechanics) ; thermoplastics ; Pre-set graft side chain ; Reactive small molecule ; Reactive swelling ; Single pore size distribution ; Tailored pore size
Language	English
Dates of publication	2023-11
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	194516-6
ISSN	0376-7388
ISSN	0376-7388
DOI	10.1016/j.memsci.2023.121902
Database	NAL-Catalogue (AGRICOLA)

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Article: Noctiluca blooms in the East China Sea bounded by ocean fronts

Qi, Lin / Hu, Chuanmin / Liu, Jianqiang / Ma, Ronghua / Zhang, Yingjun / Zhang, Shuai

Harmful algae. 2022 Feb., v. 112

2022

Abstract: A recent study demonstrated the possibility of satellite-based detection of surface blooms of the heterotrophic dinoflagellate, red Noctiluca scintillans (RNS). The study further documented RNS bloom patterns in the East China Sea (ECS) between 2000 and ... ...

Abstract	A recent study demonstrated the possibility of satellite-based detection of surface blooms of the heterotrophic dinoflagellate, red Noctiluca scintillans (RNS). The study further documented RNS bloom patterns in the East China Sea (ECS) between 2000 and 2017. Here, complemented by more recent satellite observations between 2018 and 2020, the 21-year bloom record shows that while bloom distributions vary in different years and annual cumulative bloom footprint shows an increasing trend, the 21-year cumulative bloom footprint is bounded by major ocean fronts such as the Kuroshio Front. Of all observations, 2020 is a critical year to “complete” the footprint as extra discharge from the 2020 Yangtze River flood event, combined with ocean currents, transports the bloom to the most northeast location of the footprint although the riverine influence reaches at least 128°E, well beyond the RNS footprint.
Keywords	Noctiluca ; riparian areas ; satellites ; East China Sea ; Yangtze River
Language	English
Dates of publication	2022-02
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	2091119-1
ISSN	1878-1470 ; 1568-9883
ISSN (online)	1878-1470
ISSN	1568-9883
DOI	10.1016/j.hal.2022.102172
Database	NAL-Catalogue (AGRICOLA)

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Article: Development of remote sensing algorithm for total phosphorus concentration in eutrophic lakes: Conventional or machine learning?

Xiong, Junfeng / Lin, Chen / Cao, Zhigang / Hu, Minqi / Xue, Kun / Chen, Xi / Ma, Ronghua

Water research. 2022 May 15, v. 215

2022

Abstract: Phosphorus is a limiting nutrient in freshwater ecosystems. Therefore, the estimation of total phosphorus (TP) concentration in eutrophic water using remote sensing technology is of great significance for lake environmental management. However, there is ... ...

Abstract	Phosphorus is a limiting nutrient in freshwater ecosystems. Therefore, the estimation of total phosphorus (TP) concentration in eutrophic water using remote sensing technology is of great significance for lake environmental management. However, there is no TP remote sensing model for lake groups, and thus far, specific models have been used for specific lakes. To address this issue, this study proposes a framework for TP estimation. First, three algorithm development frameworks were compared and applied to the development of an algorithm for Lake Taihu, which has complex water environment characteristics and is a representative of eutrophic lakes. An Extremely Gradient Boosting (BST) machine learning framework was proposed for developing the Taihu TP algorithm. The machine learning algorithm could mine the relationship between FAI and TP in Lake Taihu, where the optical properties of the water body are dominated by phytoplankton. The algorithm exhibited robust performance with an R² value of 0.6 (RMSE = 0.07 mg/L, MRE = 43.33%). Then, a general TP algorithm (R² = 0.64, RMSE = 0.06 mg/L, MRE = 34.13%) was developed using the proposed framework and tested in seven other lakes using synchronous image data. The algorithm accuracy was found to be affected by aquatic vegetation and enclosure aquaculture. Third, compared with field investigations in other studies on Lake Taihu, the Taihu TP algorithm showed good performance for long-term TP estimation. Therefore, the machine learning framework developed in this study has application potential in large-scale spatio-temporal TP estimation in eutrophic lakes.
Keywords	algorithms ; aquaculture ; environmental management ; eutrophication ; freshwater ; lakes ; models ; phosphorus ; phytoplankton ; research ; surface water ; total phosphorus
Language	English
Dates of publication	2022-0515
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	202613-2
ISSN	1879-2448 ; 0043-1354
ISSN (online)	1879-2448
ISSN	0043-1354
DOI	10.1016/j.watres.2022.118213
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Article: Eutrophication state in the Eastern China based on Landsat 35-year observations

Hu, Minqi / Ma, Ronghua / Xiong, Junfeng / Wang, Menghua / Cao, Zhigang / Xue, Kun

Elsevier Inc. Remote sensing of environment. 2022 Aug., v. 277

2022

Abstract: Eutrophication of the eastern plain lake (EPL) region has a significant impact on the sustainable economic development and is closely related to the shortage of water resources in China. Remote sensing provides an effective tool for quantifying the ... ...

Abstract	Eutrophication of the eastern plain lake (EPL) region has a significant impact on the sustainable economic development and is closely related to the shortage of water resources in China. Remote sensing provides an effective tool for quantifying the trophic state of inland waters by associating the trophic state index (TSI) with optically active water quality parameters. However, limited by the satellite coverage range and operation time, the long-term changes in the trophic state of the EPL region have not been thoroughly investigated. This study aims to fill this gap by generating a 35-year (1986–2020) TSI dataset of lakes in the eastern plain based on Landsat images. The TSI inversion algorithm based on the algal biomass index (ABI) was designed for Landsat series after consistency analysis. The seasonal variations of the TSI showed the highest TSI (62.0 ± 11.4) in summer and the lowest TSI (51.6 ± 8.0) in winter, with uncertainties caused by the limitation of ABI for extremely turbid waters and the number of Landsat seasonal images. The TSI of the EPLs increased over the past 35 years by about 8.2%. Four change patterns were defined for the long-term interannual TSI variations: increasing trend less than 50% (Mode 1) or more than 50% (Mode 2), breaking points that show a surge trend (Mode 3), and decreasing trend (Mode 4). The contribution of meteorological and anthropogenic factors was calculated using a generalized linear model, which revealed that the eutrophication of inland lakes in the EPL region is mainly affected by industrial wastewater discharge and urban expansion. The influence of these explanatory variables becomes more complex with an increase in lake area. Our research provides an estimation of the TSI for the first 35-year basin-scale in the EPL region and a comprehensive evaluation of the driving factors of inland water eutrophication. The results can be used for the effective management and restoration of lakes.
Keywords	Landsat ; algae ; algorithms ; biomass ; data collection ; environment ; eutrophication ; industrial wastewater ; lakes ; linear models ; summer ; urbanization ; water quality ; winter ; China
Language	English
Dates of publication	2022-08
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	431483-9
ISSN	0034-4257
ISSN	0034-4257
DOI	10.1016/j.rse.2022.113057
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Article ; Online: Effect of Health Care and Rehabilitation Nursing and Analysis of Neurovascular Preservation of Patients Undergoing Reconstruction of Severed Finger under X-ray Image Examination.

Ma, Ronghua / Du, Ru / Fan, Yanli / Wei, Jia

World neurosurgery

2020 Volume 149, Page(s) 397–405

Abstract: Objective: The study aimed to provide a guideline for continuous rehabilitation nursing for patients with severe finger replantation, and establish a satellite contact point for patients with severe finger replantation after discharge, so as to ensure ... ...

Abstract	Objective: The study aimed to provide a guideline for continuous rehabilitation nursing for patients with severe finger replantation, and establish a satellite contact point for patients with severe finger replantation after discharge, so as to ensure scientific and effective rehabilitation training after discharge and explore the role of continuous rehabilitation nursing measurement in severe finger rehabilitation and neurovascular preservation. Methods: A total of 380 patients accepting neurovascular preservation finger replantation in the hand surgery department were divided into an observation group and a control group according to the number of hospitalizations. All patients underwent reconstructive surgery of severed finger. X-ray filming was used to monitor the postoperative nursing effect of neurovascular preservation of severed finger. The discharged patient information questionnaire was filled 3 days before the discharge. Then, a patient information database was established, and rehabilitation training was performed. Finally, sexual rehabilitation nursing follow-up intervention, telephone follow-up, and cross-referring intervention were carried out. Postoperative x-ray images were taken regularly to observe the recovery of reconstructed finger. Results: There was no difference in daily life ability scores and hand function scores between the 2 groups at discharge (P > 0.05). The daily life ability scores and hand function scores of the observation group were better than those of the control group at 1 and 6 months after discharge (P < 0.05), the difference is statistically significant. As the discharge time prolonged, the daily life ability score and hand function score of the 2 groups of patients gradually increased. X-ray images showed that the replanted finger body was well developed, phalanx was in good antithesis, and there was no epiphysis. Conclusions: Continuous rehabilitation nursing measures should be taken after the replantation of the severed finger after neurovascular preservation, which provides standardized rehabilitation training standards for patients with replantation of severed finger after discharge, improves patient training compliance, promotes hand function recovery as soon as possible, and enables patients to return to society as soon as possible, which is worthy of clinical promotion and application.
MeSH term(s)	Activities of Daily Living ; Adolescent ; Adult ; Amputation, Traumatic/diagnostic imaging ; Amputation, Traumatic/nursing ; Amputation, Traumatic/physiopathology ; Amputation, Traumatic/surgery ; Female ; Finger Injuries/diagnostic imaging ; Finger Injuries/nursing ; Finger Injuries/physiopathology ; Finger Injuries/surgery ; Humans ; Male ; Radiography ; Rehabilitation Nursing/methods ; Rehabilitation Nursing/organization & administration ; Replantation/nursing ; Replantation/rehabilitation ; Young Adult
Language	English
Publishing date	2020-12-01
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2020.10.071
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