Publications by authors named "Yun-lin Zhang"
Article Synopsis
- * Results showed that DOM from both sources converged in composition under combined treatment, with microbial processes being more crucial for algal DOM and phototransformation for terrestrial DOM.
- * Complex interactions between DOM molecules and bacteria were more pronounced with terrestrial DOM, indicating that transforming this type of DOM requires greater bacterial collaboration compared to algal DOM.
Article Synopsis
- Climate change is causing alpine lake environments to become subalpine lakes, which leads to increased vegetation due to warmer temperatures and higher precipitation levels.
- Terrestrial dissolved organic matter (TDOM) from surrounding soils in these lakes undergoes significant changes due to strong sunlight and microbial activities, affecting both the composition of organic matter and the bacterial communities present.
- A study at Lake Tiancai revealed that sunlight drastically increased the diversity of TDOM while shaping bacterial communities, indicating important implications for the carbon cycle and the overall health of lake ecosystems in response to climate change.
Article Synopsis
- - The stability of organic matter-iron-phosphate (OM-Fe-P) associations is crucial for understanding how organic carbon (OC) and phosphorus (P) move and are stored in the environment.
- - The study explored how the abiotic reduction of these associations using Na-dithionite affects the release of iron (Fe), P, and organic matter (OM), finding that adsorbed OM and P are released quickly, while coprecipitated forms release them more slowly.
- - Results showed that the type of organic matter used (algae-derived vs. terrestrial humic acid) and the method of association formation significantly influenced release rates, with coprecipitated associations being more stable and having a different distribution of
Article Synopsis
- Color dissolved organic matter (CDOM) in lakes is influenced by both external (allochthonous) inputs and internal (autochthonous) production, significantly affecting its composition and cycling.
- A study was conducted in Lake Fuxian, China, to analyze CDOM during the wet season and compare its characteristics with other lakes, revealing that riverine CDOM had higher levels of humic-like substances while Lake Fuxian's CDOM was mainly protein-like.
- The findings showed that although CDOM composition varied across various lakes, the quantity increased significantly in deeper lakes with well-vegetated catchments, suggesting that allochthonous inputs impact CDOM but can be moderated by in-lake processing dynamics.
Article Synopsis
- This study evaluates the effectiveness and safety of programmed intermittent epidural bolus (PIEB) for pain relief in women during labor.
- Researchers analyzed data from multiple randomized placebo-controlled trials published until July 2021, focusing on various outcomes like pain relief, satisfaction, delivery method, and neonatal health.
- Results showed that PIEB significantly reduced the use of pain medication, the need for additional pain relief, and levels of breakthrough pain, while providing better analgesia compared to traditional methods at different time points.
Lake Tianmu is an important source of drinking water, and its water quality can influence ecosystem service functions. Unraveling the sources and composition of chromophoric dissolved organic matter (CDOM) that can affect water treatment processes is necessary to maintain water supply safety and ecosystem service functioning of Lake Tianmu. Samples were collected monthly in 2017 and analyzed for CDOM absorbance and fluorescent spectra using parallel factor analysis (PARAFAC) to investigate the spatial and temporal variations of CDOM sources and composition in Lake Tianmu.
View Article and Find Full Text PDFIn the fields of phytoplankton ecology, water optics, and water color remote sensing, phytoplankton absorption properties represent the light absorption capacity of phytoplankton, which affects photosynthesis efficiency and carbon fixation. Here, the biomass, community composition, and the absorption properties of phytoplankton were measured alongside other bio-optical parameters in Lake Tianmu are examined using data collected between January and November 2013 (except February). Based on the relationships between phytoplankton biomass, community composition, and absorption, the effects of abundance, biomass, and equivalent sphere diameter on phytoplankton absorption and specific absorption were revealed.
View Article and Find Full Text PDFBackground: Liver organoids have recently been applied as models for liver disease and drug screening, especially when combined with liver-on-a-chip technologies. Compared to hepatocyte-like cells, primary hepatocytes have high functionality but cannot maintain their function when cultured . Mesenchymal stem cells (MSCs) enhance hepatocyte function and maintain hepatocyte metabolism when co-cultured with hepatocytes.
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- The development of advanced flexible pressure sensors is crucial for creating multifunctional pressure sensors that can be effectively used in wearable human-machine interfaces (WHMIs).
- A novel pressure sensor has been created using a hierarchical conductive fabric that combines different materials, which enhances its sensitivity, detection range, and stability, making it suitable for large-scale production.
- This high-performance sensor can control systems like LED arrays and unmanned aerial vehicles (UAVs) by accurately detecting finger movements, expanding its potential uses in fields such as intelligent fabrics and robotics.
Human activities can alter dissolved organic matter (DOM) in lakes through both direct (i.e., exporting DOM of anthropogenic sources) and indirect effects (i.
View Article and Find Full Text PDFPoyang Lake and Dongting Lake are the two largest freshwater lakes in China connected to the Yangtze River. Changes in the water quality of the two lakes are critical to the water security of the residents surrounding the lakes. Analyses of the optical properties, including chromophoric dissolved organic matter (CDOM) absorption and fluorescence spectroscopy coupled by parallel factor analysis (PARAFAC), were carried out to investigate the dynamics of CDOM in the two lakes in different hydrological scenarios.
View Article and Find Full Text PDFThe bio-lability of chromophoric dissolved organic matter (CDOM) directly reflects its biodegradability potential, and also affects the migration and conversion of pollutants and impacts water quality. This study combines excitation-emission matrices and parallel factor analysis (EEMs-PARAFAC) with laboratory 28 days of bio-incubation experiments, and analyzed the bioavailability characteristics of CDOM samples collected from Lake Gaoyou, Lake Nansi and Lake Dongping in flood season and dry season. Our results showed that:① four fluorescent components were obtained using EEMs-PARAFAC, including a microbial humic-like C1, a terrestrial humic-like C4, a tryptophan-like C2, and a tyrosine-like C3.
View Article and Find Full Text PDFAquatic vegetation is an important part of lake ecosystems and plays a vital role in improving water quality and maintaining biodiversity. At present, China's lakes are facing eutrophication and the degradation of aquatic vegetation. The monitoring of temporal and spatial variations in aquatic vegetation and elucidating the main influencing factors are of great significance for protecting aquatic vegetation and restoring eutrophic lake ecosystems.
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- Lake Hongze and Lake Luoma are influenced by upstream inflows, affecting the sources and optical characteristics of Chromophoric Dissolved Organic Matter (CDOM), analyzed using EEMs and PARAFAC methods.
- Three distinct fluorescent components were identified: terrestrial humic-like (C1), tryptophan-like (C2), and tyrosine-like (C3), with C1 being the most prominent during flood seasons when inflow intensity was higher.
- Strong positive correlations were found between the terrestrial humic-like C1 component and both Dissolved Organic Carbon (DOC) concentrations and CDOM absorption, indicating that terrestrial sources significantly contribute to CDOM in these lakes.
High bone mass (HBM) is usually caused by gene mutations, and its mechanism remains unclear. In the present study, we identified a novel mutation in the long noncoding RNA that is associated with HBM. Subsequent analysis in 1,465 Chinese subjects revealed that heterozygous individuals had higher bone density compared with subjects with WT Mutant increased the formation of the CD31Emcn endothelium in the bone marrow, which stimulated angiogenesis during osteogenesis.
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- * The study simulates how cyanobacteria growth and decay affect denitrification rates by experimenting with different biomass levels and nutrient concentrations in Taihu Lake water.
- * Results showed that high cyanobacterial biomass led to a significantly increased denitrification rate, improving nitrogen removal from the water compared to lower biomass levels.
Article Synopsis
- Multispectral satellite sensors struggle to capture detailed spectral information due to limitations in their band settings, making hyperspectral reconstruction techniques valuable for enhancing data accuracy.
- This study introduces a hyperspectral reconstruction algorithm that utilizes sparse representation of water remote sensing reflectance and has been validated using data from five ocean color sensors, demonstrating a mean absolute percentage error below 10%.
- The proposed algorithm outperforms existing multi-variable linear regression methods and effectively estimates water constituent concentrations like chlorophyll-a from reconstructed satellite imagery, showcasing its potential for improved environmental monitoring.
Chromophoric dissolved organic matter (CDOM) is a fraction of dissolved organic matter that can strongly absorb light in the ultraviolet and blue regions and plays an important role in the biogeochemical cycling of carbon, nitrogen, and phosphorus. Unraveling the sources, optical composition, and corresponding spatial variabilities of CDOM can improve our understanding of carbon, nitrogen, and phosphorus cycling in lakes and lake water quality management. CDOM spectral absorption and fluorescent excitation-emission matrices were measured to investigate the compositional dynamics of CDOM under different hydrological scenarios.
View Article and Find Full Text PDFFamous as the world cultural heritage, West Lake in Hangzhou city has plenty of soft sediments with high organic matter content. To search the countermeasures for internal phosphorus release reduction from the sediment, the sediment core incubation was conducted to understand the efficacy of Phoslock on internal phosphorus release in spring, summer and winter, respectively. The results showed that the internal phosphorus release fluxes in winter and spring were relatively low, with averaged values in the entire lake of 0.
View Article and Find Full Text PDFPhotosynthetically active radiation (PAR) is defined as the wavelength band of 400 to 700 nm, representing most of the visible solar radiation that could be used for photosynthesis. PAR is attenuated by the absorption and scattering of nonpigment suspended matter, chromophoric dissolved organic matter and phytoplankton, and it plays an important role in determining the density and distribution of aquatic organisms. This study developed an empirical model and presented the spatial-temporal distribution of PAR diffuse attenuation coefficient [Kd (PAR)] for the slightly turbid Xin'anjiang Reservoir based on the in situ ground data and the matching Landsat 8 data.
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- Total suspended matter (TSM) is crucial for assessing lake water quality because it influences underwater light conditions and primary production in lakes.
- This study developed a model to estimate TSM concentration in the Xin'anjiang Reservoir using ground data and Landsat 8 satellite imagery, identifying Bands 2, 3, and 8 as significant for TSM estimation.
- A calibrated three-band combination model improved estimation accuracy, achieving a high determination coefficient and revealing that TSM concentrations in the reservoir vary, being higher near shore and in certain bays due to environmental factors.
Article Synopsis
- The study examines the absorption characteristics of total suspended particulate, phytoplankton, and tripton in Lake Qiandaohu during winter and summer, revealing different absorption patterns and coefficients at specific wavelengths.
- In winter, total suspended particulate absorption spectra resemble those of either phytoplankton or tripton, while in summer they align closely with phytoplankton.
- Findings indicate strong correlations between phytoplankton absorption coefficients and chlorophyll a concentration, with the tripton absorption coefficients showing a significant relationship with inorganic particles, mainly in winter.
Little is known about DOM characteristics in medium to large sized lakes located in the middle and lower reaches of Yangtze River, like Lake Honghu, Lake Donghu and Lake Liangzihu. Absorption, fluorescence and composition characteristics of chromophoric dissolved organic matter (CDOM) are presented using the absorption spectroscopy, the excitation-emission ma trices (EEMs) fluorescence and parallel factor analysis (PARAFAC) model based on the data collected in Sep-Oct. 2007 including 15, 9 and 10 samplings in Lake Honghu, Lake Donghu and Lake Liangzihu, respectively.
View Article and Find Full Text PDFBased on the underwater irradiance profile measurement and water samples collection in September, October 2007 in Lake Donghu, Lake Liangzi and Lake Honghu, and in April in 2010 in Lake Kuileihu, the diffuse attenuation coefficient and the dominant attenuation factors were analyzed. The ranges of diffuse attenuation coefficient and total suspended solid (TSS), organic suspended solid (OSS), inorganic suspended solid (ISS), chlorophyll a (Chla), and dissolved organic carbon (DOC) concentration varied less in Lake Donghu and Lake Kuileihu than in Lake liangzi and Lake Honghu. The regression analysis showed that ISS was the dominant affecting factor of transparency in Lake Donghu and Lake Kuileihu, but ISS and OSS jointly controlled the transparency in Lake Liangzi and Lake Honghu.
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