155 results on '"Zilong Ma"'
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2. Current Status of and Suggestions on Sewage Treatment Fees in China
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Guoming Zeng, Zilong Ma, Yu He, Lin Chen, Da Sun, and Xiaoling Lei
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sewage treatment fee ,full cost price mechanism ,polluter pays principle ,Hydraulic engineering ,TC1-978 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
China’s sewage treatment standards have been gradually improving, yet there is a widening gap between sewage treatment fees and actual costs. This discrepancy, where the fees for sewage treatment are lower than the actual operational expenses, poses a significant bottleneck to the sustainable development of China’s sewage treatment industry. As a core aspect of environmental economic policies, sewage treatment fees are pivotal in regulating water pollution emissions and addressing water resource shortages. Currently, there are major issues with sewage treatment fees, including an incomplete pricing system, insufficient fees, unclear fee distribution, and a heavy reliance on local finances. These problems impede systematic planning, diminish management efficiency, and hinder the sustainable development of the sewage treatment industry. Thus, future research efforts should prioritize the establishment of a pricing mechanism that comprehensively covers the full cost of sewage treatment. This article presents a concise summary and review of the current situation, types of fee collection, cost accounting methodologies, challenges, and proposed countermeasures for sewage treatment fees, and could serve as a relevant reference for future research on sewage treatment fees. By comprehensively addressing these issues, the sewage treatment industry would progress towards healthier and more sustainable development, ultimately achieving the goal of green growth.
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- 2024
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3. Identification of novel biomarkers linking depressive disorder and Alzheimer’s disease based on an integrative bioinformatics analysis
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Jin Song, Zilong Ma, Huishi Zhang, Ting Liang, and Jun Zhang
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Depressive ,Bioinformatics ,Immune cells ,Alzheimer’s disease ,Immune-related genes ,Genetics ,QH426-470 - Abstract
Abstract Background Previous reports revealed that a history of major depressive disorder (MDD) increased the risk of Alzheimer’s disease (AD). The immune disorder is associated with MDD and AD pathophysiology. We aimed to identify differentially expressed immune-related genes (DEIRGs) that are involved in the pathogenesis of MDD and AD. Methods We downloaded mRNA expression profiles (GSE76826 and GSE5281) from the Gene Expression Omnibus (GEO) database. The R software was used to identify DEIRGs for the two diseases separately. Functional enrichment analysis and PPI network of DEIRGs were performed. Finally, the relationship between shared DEIRGs and immune infiltrates of AD and MDD were analyzed, respectively. Results A total of 121 DEIRGs linking AD and MDD were identified. These genes were significantly enriched in immune-related pathways, such as the JAK-STAT signaling pathway, regulation of chemotaxis, chemotaxis, cytokine-cytokine receptor interaction, and primary immunodeficiency. Furthermore, three shared DEIRGs (IL1R1, CHGB, and NRG1) were identified. Correlation analysis between DEIRGs and immune cells revealed that IL1R1 and NRG1 had a negative or positive correlation with some immune cells both in AD and MDD. Conclusion Both DEIRGs and immune cell infiltrations play a vital role in the pathogenesis of AD and MDD. Our findings indicated that there are common genes and biological processes between MDD and AD, which provides a theoretical basis for the study of the comorbidity of MDD and AD.
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- 2023
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4. Combined Column and Mechanical Flotation Cell Process for the Beneficiation of Sanshandao Gold Ore
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Zilong Ma, Aosheng Yang, Yinfei Liao, Lei Wang, and Yijun Cao
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Chemistry ,QD1-999 - Published
- 2021
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5. Abnormal hubs in global network as potential neuroimaging marker in generalized anxiety disorder at rest
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Lili Meng, Yuandong Zhang, Hang Lin, Jingping Mu, Heng Liao, Runlan Wang, Shufen Jiao, Zilong Ma, Zhuangzhuang Miao, Wei Jiang, and Xi Wang
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generalized anxiety disorder ,degree centrality ,magnetic resonance imaging ,receiver operating characteristic ,middle temporal gyrus ,Psychology ,BF1-990 - Abstract
BackgroundMounting studies have reported altered neuroimaging features in generalized anxiety disorder (GAD). However, little is known about changes in degree centrality (DC) as an effective diagnostic method for GAD. Therefore, we aimed to explore the abnormality of DCs and whether these features can be used in the diagnosis of GAD.MethodsForty-one GAD patients and 45 healthy controls participated in the study. Imaging data were analyzed using DC and receiver operating characteristic (ROC) methods.ResultsCompared with the control group, increased DC values in bilateral cerebellum and left middle temporal gyrus (MTG), and decreased DC values in the left medial frontal orbital gyrus (MFOG), fusiform gyrus (FG), and bilateral posterior cingulate cortex (PCC). The ROC results showed that the DC value of the left MTG could serve as a potential neuroimaging marker with high sensitivity and specificity for distinguishing patients from healthy controls.ConclusionOur findings demonstrate that abnormal DCs in the left MTG can be observed in GAD, highlighting the importance of GAD pathophysiology.
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- 2022
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6. Can the Right Crop Mix Reduce the Water Rebound Effect Following Improvements in Irrigation Efficiency?
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Ying Chai, Haoran Zhang, Zilong Ma, Su Pan, and Jieqi Zhou
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irrigation efficiency ,water rebound ,crop mix ,double-layered moderating effect ,China ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Water rebound has been recognized as a significant issue that reduces the effectiveness of irrigation efficiency improvement policies aimed at water conservation. However, there is an absence of quantitative analysis of the impact of crop mixes on the water rebound effect, and studies focusing on the heterogeneous effects of various climatic regions are scarce. Thus, this study aims to explore the effects of water rebound on irrigation efficiency improvements from the perspectives of crop mix and climatic region. First, we construct a double-layered moderating effect framework to incorporate the two interactive factors of crop mix and climatic region combined with two rebound mechanisms, cost reduction and increased revenue. Second, we conduct empirical analyses to test three hypotheses based on provincial-level data from 2003 to 2017 in China, which provides a unique empirical context wherein changes in the crop mix depend on factors other than the water-use policy. This paper takes advantage of the implementation of Rural Land Contracting Law since 2003 and Water Conservancy Key Counties Construction Program since 2009 to identify the effects of water rebound on irrigation efficiency improvements from the perspectives of crop mix and climatic region. We found that the water rebound effect was about 67.72%. Crop mixes involving higher proportions of non-grain crops were associated with higher levels of water conservation and less water rebound. Furthermore, non-grain crops in humid regions were more likely to experience water rebound than those in non-humid regions. Thus, given China's national strategy of food security, reducing the proportion of non-grain crops in humid regions will help to sustain agricultural water resources and conserve the environment.
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- 2022
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7. Coconut genome assembly enables evolutionary analysis of palms and highlights signaling pathways involved in salt tolerance
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Yaodong Yang, Stéphanie Bocs, Haikuo Fan, Alix Armero, Luc Baudouin, Pengwei Xu, Junyang Xu, Dominique This, Chantal Hamelin, Amjad Iqbal, Rashad Qadri, Lixia Zhou, Jing Li, Yi Wu, Zilong Ma, Auguste Emmanuel Issali, Ronan Rivallan, Na Liu, Wei Xia, Ming Peng, and Yong Xiao
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Biology (General) ,QH301-705.5 - Abstract
Yaodong Yang et al. report a chromosome-scale genome assembly of the coconut and transcriptome analysis of coconut leaves. Their analysis reveals important steps along the evolutionary trajectory of palms and identifies genes that may play a key role in tolerance to salt stress.
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- 2021
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8. Salinity Drives Functional and Taxonomic Diversities in Global Water Metagenomes
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Huaihai Chen, Kayan Ma, Yu Huang, Yuchun Yang, Zilong Ma, and Chengjin Chu
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metagenomics ,microbes ,taxonomy ,function ,salinity ,freshwater ,Microbiology ,QR1-502 - Abstract
A tight association between microbial function and taxonomy is the basis of functional prediction based on taxonomy, but such associations have been controversial in water biomes largely due to the probable prevalence of functional redundancy. However, previous studies on this topic used a relatively coarse resolution of ecosystem functioning, potentially inflating the estimated functional redundancy. Thus, a comprehensive evaluation of the association between high-resolution functional traits and taxonomic diversity obtained from fresh and saline water metagenomic data is urgently needed. Here, we examined 938 functionally and taxonomically annotated water metagenomes obtained worldwide to scrutinize the connection between function and taxonomy, and to identify the key driver of water metagenomes function or taxonomic composition at a global scale. We found that pairwise similarity of function was significantly associated with taxonomy, though taxonomy had higher global dissimilarity than function. Classification into six water biomes resulted in greater variation in taxonomic compositions than functional profiles, as the key regulating factor was salinity. Fresh water microbes harbored distinct functional and taxonomic structures from microbes in saline water biomes, despite that taxonomy was more susceptible to gradient of geography and climate than function. In summary, our results find a significant relationship between taxonomic diversity and microbial functioning in global water metagenomes, although microbial taxonomic compositions vary to a larger extent than functional profiles in aquatic ecosystems, suggesting the possibility and necessity for functional prediction of microorganisms based on taxonomy in global aquatic ecosystems.
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- 2021
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9. Study on the Influence of Metal Ions on the Dispersion of Fine Calcium Gangue Minerals
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Zhongyi Liu, Jie Liu, Yinfei Liao, Zilong Ma, and Chenxi Jin
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metal ions ,fine ,calcite ,dispersion behavior ,Organic chemistry ,QD241-441 - Abstract
In this study, the calcium gangue material calcite (−10 μm) was used to investigate the effects of different kinds of metal ions and dosages on the dispersion behavior of calcite. The test results showed that the dispersion behavior of calcite was poor under strongly alkaline conditions without the addition of metal ions, and the reason for that was calcite dissolved ions. The degree of influence of different metal ions on calcite dispersion behavior was Fe3+ > Mg2+ > Na+. The three metal ion dosage tests showed that the dispersion behavior of calcite became poorer with the increase of metal ion dosage. This mainly showed that with the increase of Na+ dosage, the trend of the dispersion behavior of calcite was not obvious, but with the increase of Fe3+ and Mg2+ dosage, the trend of calcite dispersion behavior changed more. The dispersion behavior of calcite was devastated by 5 × 10−4 mol/L Fe3+ at pH = 4–12. The different mechanisms of the three metal ions were identified by zeta potential, solution chemistry, and XPS analysis. Na+ only changed the zeta potential value of the calcite surface, which acted as a compressed electric double layer. However, the formation of metal hydroxide species or metal hydroxide surface precipitation due to the adsorption of Fe3+ and Mg2+ on the mineral surface resulted in the change of the dispersion behavior of calcite.
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- 2022
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10. Effect of Unavoidable Ion (Ca2+) in Pulp on the Dispersion Behavior of Fine Smithsonite
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Zhongyi Liu, Jie Liu, Yinfei Liao, Chenxi Jin, and Zilong Ma
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smithsonite ,fine particles ,calcium ions ,dispersion ,Organic chemistry ,QD241-441 - Abstract
The efficient dispersion of particles is a prerequisite for the efficient flotation of fine smithsonite. However, unavoidable ions (Ca2+) in the pulp have become a challenge for the efficient separation of fine smithsonite, due to the high content of pulp and small radius of hydrated ions. Therefore, the dispersion behavior and mechanism of Ca2+ action on smithsonite are important for improving the efficiency of smithsonite flotation. In this study, the effects of Ca2+ on the dispersion behavior of fine smithsonite were studied using a turbidity test. The results showed that the dispersion behavior of smithsonite was good in the absence of Ca2+ at a range of pH = 4–12. However, the measured turbidity values of smithsonite decreased with the addition of calcium ions. In particular, the dispersion behavior of smithsonite became worse at pH > 10. Zeta potential test results showed that the smithsonite’s surface potential shifted positively, and the absolute value of potential decreased in the presence of Ca2+. The results of X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) analysis showed that calcium ions were adsorbed on the smithsonite surface, which may have caused ion exchange or the generation of calcium hydroxide precipitation leading to particle coalescence behavior. The calculations of solution chemistry and DLVO theory indicated that calcium ions adsorbed on the surface of smithsonite to form Ca(OH)+ or precipitation, which reduced the potential energy of interparticle interactions and led to the disruption of dispersion behavior of smithsonite.
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- 2022
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11. Trade-Offs between Economic Gains and Carbon Stocks across a Range of Management Alternatives in Boreal Forests
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Zilong Ma, Si Chen, Chander Shahi, Han Y. H. Chen, and Hao Chen
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boreal forests ,carbon pool ,economic gain–carbon stock relationship ,overstorey composition ,rotation age ,Plant ecology ,QK900-989 - Abstract
Boreal forests, storing approximately half of the global forest carbon (C), are key to the global C cycle and climate regulation. The sustainability of C stocks is adversely impacted by forest management. However, the economic gain–C stock relationship across forest management alternatives and diverse C pools remain unclear. Using empirical data, we examined the relationships between economic gains and total ecosystem C in response to the changes in rotation age and overstorey composition in boreal forests. We found that total ecosystem C increased initially, reached a maximum, and declined thereafter with increasing economic gains. The relationships between economic gains and C stocks of live biomass, deadwood, forest floor, and mineral soil followed similar trends with total ecosystem C. Path analysis showed that both rotation age and overstorey composition simultaneously drove economic gains and C stocks that led to their trade-off relationship. We further indicated that maximum economic gains (USD 5000/ha) could lead to approximately 40% loss of total ecosystem C, while the maximum total ecosystem C (320 Mg/ha) could be attained when giving up 50% of economic gains. These results provide broad guides for forest managers and decision-makers towards balancing economic and C objectives in forest management by integrating into a forest carbon market.
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- 2022
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12. Propagation of positive, negative, and recoil leaders in upward lightning flashes
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XiuShu Qie, ShanFeng Yuan, HongBo Zhang, RuBin Jiang, ZhiJun Wu, MingYuan Liu, ZhuLing Sun, YunJiao Pu, JinLiang Li, Abhay Srivastava, ZiLong Ma, and GaoPeng Lu
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lightning propagation ,negative leader ,positive leader ,recoil leader ,Science ,Geophysics. Cosmic physics ,QC801-809 ,Environmental sciences ,GE1-350 - Abstract
Leader propagation is a fundamental issue in lightning physics. The propagation characteristics of positive leaders and negative leaders are summarized and compared based on data from high-speed camera and electromagnetic field in rocket-triggered lightning and tower-initiated lightning discharges; available channel base current data recorded in rocket-triggered lightning are also used. The negative leaders propagate in a stepped fashion accompanied by many branches. The stems ahead of the negative leader tip determine the manner and direction of the leader propagation, and even the branching and winding of the lightning channel. The impulsive current, electromagnetic field, and related optical images suggest that the positive leader may develop in a step-like fashion at its initial stage of triggered lightning. However, the stepping processes of the positive leader are obviously different from those of the negative leader. Tower-initiated lightning revealed that the most conspicuous characteristics of the stepwise positive leader involve the intermittent brush-like corona zone in front of the leader tip and the luminosity enhancement of the channel behind the tip. In rocket-triggered lightning flashes, the charge transferred during an individual step for the negative leader was nearly an order greater than for the positive counterpart. The successive streamers ahead of the leader tip are essential for both negative and positive leader propagation, and the stems could be formed from one or more streamers in the previous negative streamer zone with the main leader channel dim. High-resolution observation of tower lightning also revealed a new type of bidirectional recoil leader, with polarity contrary to the traditional one, traversing in negative channels associated with tower-initiated and rocket-triggered lightning.
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- 2019
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13. An Insight into Anti-Inflammatory Activities and Inflammation Related Diseases of Anthocyanins: A Review of Both In Vivo and In Vitro Investigations
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Zilong Ma, Bin Du, Jun Li, Yuedong Yang, and Fengmei Zhu
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anthocyanins ,inflammation ,NF-κB ,MAPKs ,inflammation related diseases ,in vitro ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Anthocyanin is a type of flavonoid pigment widely present in fruits and vegetables. It can not only be used as natural pigment, but also has a variety of health functions, for instance, anti-oxidant, anti-inflammatory, anti-tumor, and neuroprotective activities. Persistent proinflammatory status is a major factor in the development, progression, and complications of chronic diseases. Not surprisingly, there are thus many food ingredients that can potentially affect inflammation related diseases and many studies have shown that anthocyanins play an important role in inflammatory pathways. In this paper, the inflammation related diseases (such as, obesity, diabetes, cardiovascular disease, and cancer) of anthocyanins are introduced, and the anti-inflammatory effect of anthocyanins is emphatically introduced. Moreover, the anti-inflammatory mechanism of anthocyanins is elaborated from the aspects of NF-κB, toll like receptor, MAPKs, NO, and ROS and the main efficacy of anthocyanins in inflammation and related diseases is determined. In conclusion, this review aims to get a clear insight into the role of anthocyanins in inflammation related diseases.
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- 2021
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14. Zinc Recovery from Wulagen Sulfide Flotation Plant Tail by Applying Ether Amine Organic Collectors
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Zilong Ma, Lei Wang, Xiao Ni, Yinfei Liao, and Zhian Liang
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froth flotation ,smithsonite tailings ,ether amine ,Organic chemistry ,QD241-441 - Abstract
Separating oxidized zinc minerals from flotation tailings is always a challenge. In this study, a flotation tailing from Wulagen zinc mine in China (Zn grade < 1%) was processed using froth flotation with combinations of amines (OPA 10, OPA 1214, OPA 13, DDA) and Na2S to study the effects of these amines on the zinc recovery as well as their interactions with other reagents, aiming to screen out a proper reagent scheme to improve zinc separation from extremely low-grade zinc flotation tailings. The results show that different amines led to different flotation performance, and the collectors were ranked as OPA 1214, OPA 13, OPA 10 and DDA in a decreasing order based on flotation collectivity and selectivity. An increase in the concentration of each collector increased the zinc recovery but reduced the concentrate zinc grade. Interactions were also observed between different amines and Na2S and Na2SiO3, and OPA 1214 outdid the others in saving the usage of both the Na2S and Na2SiO3. The measured adsorption of collector onto smithsonite was found to correlate well with flotation test results. It was concluded that hydrocarbon chains can be held accountable for the difference in the flotation performance with different amines. The longer the hydrocarbon chain, the stronger the hydrophobic association ability of amine, which is conducive to the selective amine adsorption onto sulfurized smithsonite particles and hence the smithsonite flotation.
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- 2021
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15. Physiological responses to drought in three provenances of Discorea nipponica Makino
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Runmei Gao, Xiaodong Shi, Zilong Ma, Yong Li, and Jinming Wen
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Plant culture ,SB1-1110 ,Botany ,QK1-989 - Abstract
Dioscorea nipponica Makino is an optimal candidate to develop the diosgenin industry in North China. Given the large fluctuations in soil water availability induced by global climate change, information on drought tolerance of this species is urgently needed. Thus, seedlings of three provenances, selected from Manghe, Pangquangou nd Luyashan Nature Reserves in Shanxi Province, were exposed to 70%-85%, 55%-60%, 40%-45% and 20%-35% of water holding capacity, representing normal-watered, light drought stress, moderate drought stress and severe drought stress, respectively. Thirteen indices concerning plant water status, photosynthesis, antioxidants and osmotic regulation were recorded. Principal Component Analysis was applied to identify indices with a high contribution to drought tolerance, fulfilled by the average of subordinate function values (Xij) of drought tolerance index (Xij). We found that rhizome-propagated seedlings of D. nipponica Makino could survive eighty days of severe drought. The drought tolerance of this species is achieved mainly through physiological responses including decreased photosynthesis, increased activity of antioxidant enzymes, and accumulation of osmotic regulating compounds. The means of drought tolerance index for the provenances Manghe, Pangquangou and Luyashan were 0.29, 0.68 and 0.50, respectively. Pangquangou provenance showed higher drought tolerance than the other two, indicating that it might be a good candidate for cross breeding to combat the increasing drought climate in Shanxi Province.
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- 2018
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16. Adaptive Multi-Paddock Grazing Lowers Soil Greenhouse Gas Emission Potential by Altering Extracellular Enzyme Activity
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Bharat M. Shrestha, Edward W. Bork, Scott X. Chang, Cameron N. Carlyle, Zilong Ma, Timm F. Döbert, Dauren Kaliaskar, and Mark S. Boyce
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climate change ,grazing management ,GHG mitigation ,northern temperate grasslands ,soil incubation ,soil moisture ,Agriculture - Abstract
Adaptive multi-paddock (AMP) grazing is a form of rotational grazing in which small paddocks are grazed with high densities of livestock for short periods, with long recovery periods prior to regrazing. We compared the fluxes of greenhouse gases (GHGs), including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), from soils of AMP-grazed grasslands to paired neighboring non-AMP-grazed grasslands across a climatic gradient in Alberta, Canada. We further tested GHG responses to changes in temperature (5 °C vs. 25 °C) and moisture levels (permanent wilting point (PWP), 40% of field capacity (0.4FC), or field capacity (FC)) in a 102-day laboratory incubation experiment. Extracellular enzyme activities (EEA), microbial biomass C (MBC) and N (MBN), and available-N were also measured on days 1, 13, and 102 of the incubation to evaluate biological associations with GHGs. The 102-day cumulative fluxes of CO2, N2O, and CH4 were affected by both temperature and moisture content (p < 0.001). While cumulative fluxes of N2O were independent of the grazing system, CH4 uptake was 1.5 times greater in soils from AMP-grazed than non-AMP-grazed grasslands (p < 0.001). There was an interaction of the grazing system by temperature (p < 0.05) on CO2 flux, with AMP soils emitting 17% more CO2 than non-AMP soils at 5 °C, but 18% less at 25 °C. The temperature sensitivity (Q10) of CO2 fluxes increased with soil moisture level (i.e., PWP < 0.4FC ≤ FC). Structural equation modelling indicated that the grazing system had no direct effect on CO2 or N2O fluxes, but had an effect on CH4 fluxes on days 1 and 13, indicating that CH4 uptake increased in association with AMP grazing. Increasing soil moisture level increased fluxes of GHGs—directly and indirectly—by influencing EEAs. Irrespective of the grazing system, the MBC was an indirect driver of CO2 emissions and CH4 uptake through its effects on soil EEAs. The relationships of N-acetyl-β glucosaminidase and β-glucosidase to N2O fluxes were subtle on day 1, and independent thereafter. AMP grazing indirectly affected N2O fluxes by influencing N-acetyl-β glucosaminidase on day 13. We conclude that AMP grazing has the potential to mitigate the impact of a warmer soil on GHG emissions by consuming more CH4 compared to non-AMP grazing in northern temperate grasslands, presumably by altering biogeochemical properties and processes.
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- 2020
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17. Genome-wide identification and transferability of microsatellite markers between Palmae species
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Yong Xiao, Wei Xia, Jianwei Ma, Annaliese S Mason, Haikuo Fan, Peng Shi, Xintao Lei, Zilong Ma, and Ming Peng
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microsatellite ,Phoenix dactylifera ,PALM ,Elaeis guineensis ,cross-genera transferability ,Plant culture ,SB1-1110 - Abstract
The Palmae family contains 202 genera and approximately 2800 species. Except for Elaeis guineensis and Phoenix dactylifera, almost no genetic and genomic information is available for Palmae species. Therefore, this is an obstacle to the conservation and genetic assessment of Palmae species, especially those that are currently endangered. The study was performed to develop a large number of microsatellite markers which can be used for genetic analysis in different Palmae species. Based on the assembled genome of Elaeis guineensis and Phoenix dactylifera, a total of 814 383 and 371 629 microsatellites were identified. Among these microsatellites identified in Elaeis guineensis, 734 509 primer pairs could be designed from the flanking sequences of these microsatellites. The majority (618 762) of these designed primer pairs had in silico products in the genome of Elaeis guineensis. These 618 762 primer pairs were subsequently used to in silico amplify the genome of Phoenix dactylifera. A total of 7 265 conserved microsatellites were identified between Elaeis guineensis and Phoenix dactylifera. One hundred and thirty-five primer pairs flanking the conserved SSRs were stochastically selected and validated to have high cross-genera transferability, varying from 16.7% to 93.3% with an average of 73.7%. These genome-wide conserved microsatellite markers will provide a useful tool for genetic assessment and conservation of different Palmae species in the future.
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- 2016
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18. Interaction Mechanism of Ferric Ions with Celestite Surface and Implications for Flotation Recovery
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Shiming Cao, Yijun Cao, Zilong Ma, Yinfei Liao, and Xiaolin Zhang
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celestite ,ferric ions ,adsorption ,flotation ,Mineralogy ,QE351-399.2 - Abstract
In practical celestite flotation, iron contamination is commonly found on celestite surfaces. The effect of ferric ions on celestite flotation was assessed by a combination of ion release experiments, DFT calculation, X-ray photoelectron spectroscopy (XPS) analysis, adsorption isotherm study, and flotation experiments in this work. The ion release experiments showed that the associated limonite released ferric ions to solution. According to DFT calculation and surface complexation theory, we found that ≡SrOH0 and ≡SO4H0 are primary functional groups on celestite surface in aqueous environments. The XPS analysis and adsorption isotherm study revealed that ferric ions mainly adsorbed on celestite surface by complexing with two oxygen atoms of surface ≡SrOH0 groups to form ≡Sr−O−Fe−OH precipitates. Flotation results showed that ferric ions strongly depressed celestite flotation. Combined with the change in surface properties determined by XPS, it can be concluded that the adsorption of ferric ions on celestite surface decreased adsorption sites for the collector, and hence, led to depression on celestite flotation.
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- 2019
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19. Interaction Mechanism between Molybdenite and Kaolinite in Gypsum Solution Using Kerosene as the Flotation Collector
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Liqing Sun, Yijun Cao, Yinfei Liao, and Zilong Ma
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molybdenite flotation ,kaolinite ,gypsum solution ,interaction mechanism ,atomic force microscope ,Mineralogy ,QE351-399.2 - Abstract
This paper aims to understand the fundamental interaction mechanism between molybdenite and kaolinite in gypsum solution using kerosene as collector. Micro-flotation tests were conducted to study the effect of gypsum solution on the flotation performance of mixed −74 μm molybdenite and −10 μm kaolinite mineral. The results showed that the recovery of molybdenite decreased from 86% to 74% while the gypsum solution concentration increased from 0 to 800 mg/L, indicating the detrimental effect of kaolinite on molybdenite flotation could be enhanced by gypsum solution. This is mainly caused by the slime coating of kaolinite on molybdenite through dissolved calcium ion of gypsum solution. In order to confirm the slime coating phenomenon, zeta potential distribution, scanning electron microscopy (SEM) and atomic force microscopy (AFM) measurements were used to investigate interaction characteristics and mechanisms. The zeta potential distribution results revealed that mixed samples had the value between signal molybdenite and kaolinite samples in gypsum solution, which proved the coating phenomenon of kaolinite on molybdenite. Moreover, the coating phenomenon was becoming more and more obvious with the gypsum solution concentration. The coating phenomenon of kaolinite on molybdenite surface was also directly observed from SEM results. The AFM results provided further evidence for the possibility of slime coating, as the adhesion force increased with the gypsum solution concentration, which means the aggregates of molybdenite and kaolinite were becoming more stable.
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- 2018
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20. Metal Ion Release in Bastnaesite Flotation System and Implications for Flotation
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Shiming Cao, Yijun Cao, Zilong Ma, and Yinfei Liao
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bastnaesite ,metal ions ,flotation ,adsorption ,Mineralogy ,QE351-399.2 - Abstract
Ca2+, Mg2+, Sr2+ and Fe3+ were found to be commonly released into bastnaesite flotation pulp from minerals with relatively high concentrations. The influence and corresponding mechanism of Ca2+, Mg2+, Sr2+, Fe3+ and Al3+, on bastnaesite flotation, have been studied by micro flotation tests, induction time measurements, adsorption measurements and solution chemistry analysis. It was found that all aforementioned metal ions depressed bastnaesite flotation. The order of depression ability was Fe3+ > Al3+ > Mg2+ > Sr2+ > Ca2+ and the depression ability changed along with pH. The depression was mainly attributed to the adsorption of metals ions, which hindered collector adsorption. The species diagrams of metal ions changed along with pH, consequently changing the adsorption of metal ions on mineral surfaces, and therefore leading to different influences on flotation.
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- 2018
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21. Depression Mechanism of Strontium Ions in Bastnaesite Flotation with Salicylhydroxamic Acid as Collector
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Shiming Cao, Yijun Cao, Yinfei Liao, and Zilong Ma
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bastnaesite ,strontium ions ,depression ,flotation ,Mineralogy ,QE351-399.2 - Abstract
Metal ions are widely present in flotation pulp. Metal ions change solution chemistry and mineral surface properties, consequently affecting mineral flotation. In this work, the effect of strontium ions on bastnaesite flotation with salicylhydroxamic acid (SHA) was investigated by microflotation tests, contact angle measurements, zeta-potential measurements, and X-ray photoelectron spectroscopy (XPS) analysis. Microflotation tests confirmed that the addition of strontium ions decreased bastnaesite floatability, compared with that in the absence of strontium ions. Contact angle measurements suggested that the pretreatment of strontium ions decreased SHA adsorption. Zeta potential measurements confirmed that the bastnaesite was depressed by the adsorption of positively charged strontium species, and the lower adsorption capacity of SHA onto the bastnaesite surfaces was obtained after modifying with strontium ions. XPS analysis demonstrated that strontium ions adsorbed onto the bastnaesite surfaces through the interaction between strontium ions and oxygen atoms of surface ≡ CeOH 0 groups. This occurrence hindered surface Ce sites which chelated with SHA and therefore, decreased bastnaesite floatability.
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- 2018
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22. RNA-seq analysis of oil palm under cold stress reveals a different C-repeat binding factor (CBF) mediated gene expression pattern in Elaeis guineensis compared to other species.
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Xintao Lei, Yong Xiao, Wei Xia, Annaliese S Mason, Yaodong Yang, Zilong Ma, and Ming Peng
- Subjects
Medicine ,Science - Abstract
Elaeis guineensis as a tropical oil-crop is particularly sensitive to low temperature. Improvement of cold-tolerance may significantly increase the total cultivation area of this tropical oil-crop worldwide. We sequenced cold-treated and control (untreated) samples of Elaeis guineensis. De novo assembly generated 51,452 unigenes with an average length of 703 bp. Subsequently, these expressed sequences were functionally annotated. In the K category (transcription factors) of COG (Cluster of Orthologous Group) annotation, the largest proportion of genes induced and repressed at least two-fold under cold stress were from the AP2/ERE family, indicating that C-repeat binding factor, (CBFs, members of the AP2/ERE family) may play a central role in cold tolerance in Elaeis guineensis. Subsequently, the CBF-mediated signal transduction pathway was reconstructed based on transcriptome data and the gene expression profile involving the pathway was examined using real-time quantitative RT-PCR (qRT-PCR). CBFs reached maximum transcript level both at medium (4 h) and long period time points (7 days), contrary to the expression pattern of CBFs in Arabidopsis and rice. Moreover, the promoters of downstream Cold Responsive gene (CORs) regulated by CBFs were analyzed. Conservation, mutation and absence of the DRE core motif were detected in the promoters of six CORs. These mutations in DRE motifs suggest that CORs may not be induced via cold stress in Elaeis guineensis.
- Published
- 2014
- Full Text
- View/download PDF
23. Characterization and evolution of conserved MicroRNA through duplication events in date palm (Phoenix dactylifera).
- Author
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Yong Xiao, Wei Xia, Yaodong Yang, Annaliese S Mason, Xintao Lei, and Zilong Ma
- Subjects
Medicine ,Science - Abstract
MicroRNAs (miRNAs) are important regulators of gene expression at the post-transcriptional level in a wide range of species. Highly conserved miRNAs regulate ancestral transcription factors common to all plants, and control important basic processes such as cell division and meristem function. We selected 21 conserved miRNA families to analyze the distribution and maintenance of miRNAs. Recently, the first genome sequence in Palmaceae was released: date palm (Phoenix dactylifera). We conducted a systematic miRNA analysis in date palm, computationally identifying and characterizing the distribution and duplication of conserved miRNAs in this species compared to other published plant genomes. A total of 81 miRNAs belonging to 18 miRNA families were identified in date palm. The majority of miRNAs in date palm and seven other well-studied plant species were located in intergenic regions and located 4 to 5 kb away from the nearest protein-coding genes. Sequence comparison showed that 67% of date palm miRNA members were present in duplicated segments, and that 135 pairs of miRNA-containing segments were duplicated in Arabidopsis, tomato, orange, rice, apple, poplar and soybean with a high similarity of non coding sequences between duplicated segments, indicating genomic duplication was a major force for expansion of conserved miRNAs. Duplicated miRNA pairs in date palm showed divergence in pre-miRNA sequence and in number of promoters, implying that these duplicated pairs may have undergone divergent evolution. Comparisons between date palm and the seven other plant species for the gain/loss of miR167 loci in an ancient segment shared between monocots and dicots suggested that these conserved miRNAs were highly influenced by and diverged as a result of genomic duplication events.
- Published
- 2013
- Full Text
- View/download PDF
24. A Modified STAP Estimator for Superresolution of Multiple Signals
- Author
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Zhongbao Wang, Junhao Xie, Zilong Ma, and Taifan Quan
- Subjects
Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Cellular telephone services industry. Wireless telephone industry ,HE9713-9715 - Abstract
A modified space-time adaptive processing (STAP) estimator is described in this paper. The estimator combines the incremental multiparameter (IMP) algorithm and the existing beam-space preprocessing techniques yielding a computationally cheap algorithm for the superresolution of multiple signals. It is a potential technique for the remote sensing of the ocean currents from the broadened first-order Bragg sea echo spectrum of shipborne high-frequency surface wave radar (HFSWR). Some simulation results and real-data analysis are shown to validate the proposed algorithm.
- Published
- 2013
- Full Text
- View/download PDF
25. Meta‐analysis shows forest soil <scp> CO 2 </scp> effluxes are dependent on the disturbance regime and biome type
- Author
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Oluwabunmi J. Akande, Zilong Ma, Chenyan Huang, Fangliang He, and Scott X. Chang
- Subjects
Ecology, Evolution, Behavior and Systematics - Published
- 2023
26. Species mixtures increase fine root length to support greater stand productivity in a natural boreal forest
- Author
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Chenyan Huang, Han Y. H. Chen, Scott X. Chang, James F. Cahill, and Zilong Ma
- Subjects
Ecology ,Plant Science ,Ecology, Evolution, Behavior and Systematics - Published
- 2023
27. Widespread controls of leaf nutrient resorption by nutrient limitation and stoichiometry
- Author
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Xibin Sun, Dejun Li, Xiaotao Lü, Yunting Fang, Zilong Ma, Zhenchuan Wang, Chengjin Chu, Meimei Li, and Hao Chen
- Subjects
Ecology, Evolution, Behavior and Systematics - Published
- 2023
28. New insights into the relationships between livestock grazing behaviors and soil organic carbon stock in an alpine grassland
- Author
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Yuye Shen, Yunying Fang, Huai Chen, Zilong Ma, Chengpeng Huang, Xiaofen Wu, Scott X. Chang, Ehsan Tavakkoli, and Yanjiang Cai
- Subjects
Ecology ,Animal Science and Zoology ,Agronomy and Crop Science - Published
- 2023
29. Author response for 'Meta‐analysis shows forest soil <scp> CO 2 </scp> effluxes are dependent on the disturbance regime and biome type'
- Author
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null Oluwabunmi J. Akande, null Zilong Ma, null Chenyan Huang, null Fangliang He, and null Scott X. Chang
- Published
- 2023
30. Author response for 'Species mixtures increase fine root length to support greater stand productivity in a natural boreal forest'
- Author
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null Chenyan Huang, null Han Y. H. Chen, null Scott X. Chang, null James F. Cahill, and null Zilong Ma
- Published
- 2023
31. When things get MESI: the Manipulation Experiments Synthesis Initiative : a coordinated effort to synthesize terrestrial global change experiments
- Author
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Kevin Van Sundert, Sebastian Leuzinger, Martin K.‐F. Bader, Scott X. Chang, Martin G. De Kauwe, Jeffrey S. Dukes, J. Adam Langley, Zilong Ma, Bertold Mariën, Simon Reynaert, Jingyi Ru, Jian Song, Benjamin Stocker, César Terrer, Joshua Thoresen, Eline Vanuytrecht, Shiqiang Wan, Kai Yue, and Sara Vicca
- Subjects
warming ,CO2 FERTILIZATION ,Biodiversity & Conservation ,Environmental Sciences & Ecology ,910 Geography & travel ,drought ,DISTRIBUTED EXPERIMENTS ,precipitation ,nitrogen ,manipulation experiment ,Environmental Chemistry ,NUTRIENT AVAILABILITY ,PLANT ,FOREST GROWTH ,Biology ,General Environmental Science ,Global and Planetary Change ,Science & Technology ,Ecology ,SOIL CARBON LOSS ,meta-analysis ,Chemistry ,climate change ,Biodiversity Conservation ,CO2 ,ELEVATED CO2 ,Life Sciences & Biomedicine ,Environmental Sciences ,PRIMARY PRODUCTIVITY ,RESPONSES - Abstract
Responses of the terrestrial biosphere to rapidly changing environmental conditions are a major source of uncertainty in climate projections. In an effort to reduce this uncertainty, a wide range of global change experiments have been conducted that mimic future conditions in terrestrial ecosystems, manipulating CO2 , temperature, and nutrient and water availability. Syntheses of results across experiments provide a more general sense of ecosystem responses to global change, and help to discern the influence of background conditions such as climate and vegetation type in determining global change responses. Several independent syntheses of published data have yielded distinct databases for specific objectives. Such parallel, uncoordinated initiatives carry the risk of producing redundant data collection efforts and have led to contrasting outcomes without clarifying the underlying reason for divergence. These problems could be avoided by creating a publicly available, updatable, curated database. Here, we report on a global effort to collect and curate 57,089 treatment responses across 3644 manipulation experiments at 1145 sites, simulating elevated CO2 , warming, nutrient addition, and precipitation changes. In the resulting Manipulation Experiments Synthesis Initiative (MESI) database, effects of experimental global change drivers on carbon and nutrient cycles are included, as well as ancillary data such as background climate, vegetation type, treatment magnitude, duration, and, unique to our database, measured soil properties. Our analysis of the database indicates that most experiments are short term (one or few growing seasons), conducted in the USA, Europe, or China, and that the most abundantly reported variable is aboveground biomass. We provide the most comprehensive multifactor global change database to date, enabling the research community to tackle open research questions, vital to global policymaking. The MESI database, freely accessible at doi.org/10.5281/zenodo.7153253, opens new avenues for model evaluation and synthesis-based understanding of how global change affects terrestrial biomes. We welcome contributions to the database on GitHub. ispartof: GLOBAL CHANGE BIOLOGY vol:29 issue:7 pages:1922-1938 ispartof: location:England status: accepted
- Published
- 2023
32. Portfolio of Performance Evaluation.
- Author
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Zilong Ma
- Published
- 2014
- Full Text
- View/download PDF
33. Zinc recovery from Wulagen sulphide flotation plant tail, Part I: reagent scheme design
- Author
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Xiao Ni, Zhian Liang, Shuiping Zhong, Zilong Ma, and Yinfei Liao
- Subjects
Metals and Alloys ,Industrial and Manufacturing Engineering - Published
- 2022
34. Insight into the gallium selectivity mechanism of in-suit ion-imprinted material in multi-ion systems
- Author
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Na Chai, Lihui Gao, Shulei Li, Yijun Cao, Zilong Ma, Lingni Li, and Ming Hu
- Subjects
Control and Systems Engineering ,Mechanical Engineering ,General Chemistry ,Geotechnical Engineering and Engineering Geology - Published
- 2023
35. Population persistence of birds affected by species traits under long-term severe droughts
- Author
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Lyubing Zhang, Zilong Ma, and Yang Liu
- Abstract
Changing drought regimes is a rising threat to biodiversity, but reported drought impacts on species varied greatly. Acknowledging the factors associating with these impacts will bring novel understandings to species vulnerability to the changes of extreme climatic events, and facilitate effective mitigation of climate change risks. Based on the peer-reviewed studies of a well-monitored taxonomic group – birds, we examined the effects of droughts on population persistence with a focus on two aspects: population abundance and reproductive success. Responses of relevant indicators of 172 bird species were extracted across eight terrestrial biomes, and the droughts triggering these responses were measured with a climate-comparable and multi-scalar index of drought severity. A meta-analysis was then conducted for the drought effect on relative abundance and reproductive success separately, which included the temporal scale and severity of droughts, as well as biological and life-history traits of species to explain the effect. We found that droughts had an overall negative effect on bird abundance and reproductive success. Apparent abundance generally declined for severe droughts lasting over a year, while the examined responses varied greatly due to the disparities of sensitivity and plasticity among species under droughts occurring at 3-month scale. Drought-induced declines in abundance were identified for species feeding on invertebrates, fruits or nectar, and species of a smaller range showed lower reproductive success during or after droughts. A small clutch size additionally contributed to the reductions in relative abundance or reproductive success under severe droughts. Our findings indicate that bird species with above drought-susceptible traits would confront greater challenges to population persistence in the regions where the duration of severe droughts extends. The study also highlights the necessity of exploring the unknowns that lie in the links between population persistence and drought responses of bird behaviors, distribution, morphology and physiology.
- Published
- 2022
36. Bird survival affected by species traits under long-term severe droughts
- Author
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Lyubing Zhang, Zilong Ma, and Yang Liu
- Abstract
Changing drought regimes is a rising threat to biodiversity, but reported drought impacts on species varied greatly. Acknowledging the factors associating with these impacts will bring novel understandings to species vulnerability to the changes of extreme climatic events, and facilitate effective mitigation of climate change risks. By compiling the responses of 172 bird species to droughts from global publications, we found bird abundance generally declined for severe droughts lasting over a year. Drought-induced declines in abundance were identified for species feeding on invertebrates, fruits or nectar. Species of a smaller range showed lower reproductive performance during or after droughts. In addition to these factors, a small clutch size also contributed to the reductions in bird abundance or reproductive performance under severe droughts. In the regions where the duration and/or intensity of severe droughts increase, bird species with above susceptible traits would confront greater risks to survival.
- Published
- 2022
37. Divergent responses of carbon-degrading enzyme activities to litter alterations: Implications for soil respiration
- Author
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Qianhao Xu, Ji Chen, Kees-Jan van Groenigen, Dejun Li, Daryl Moorhead, Brooke Osborne, Zilong Ma, Jørgen Olesen, Bruce Hungate, Pete Smith, Xibin Sun, Chengjin Chu, and Hao Chen
- Abstract
Global change affects terrestrial litter inputs with cascading effects on soil respiration (SR). Cellulase and ligninase are dominant carbon-degrading enzymes, targeting the decomposition of readily decomposable and structurally complex carbon pools, respectively. Nevertheless, how litter alterations influence cellulase and ligninase activities and the implications for SR remain unclear. We conducted a meta-analysis to show that litter addition increased cellulase activity by 25.2%, whereas litter removal decreased it by 25.9%. Neither litter addition nor removal influenced ligninase activity. The changes in cellulase activity correlated positively with changes in SR, but not for ligninase activity. The effects of litter addition and removal on cellulase activity decreased with treatment duration. These results indicate that litter alterations affect SR primarily by controlling the microbial decomposition of readily decomposable rather than structurally complex carbon pools. Altogether, we suggest that the total and long-term effects of litter alterations on SR might be smaller than previously thought.
- Published
- 2022
38. Global meta-analysis shows that climate and land use disturbances increase forest soil CO2 efflux
- Author
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Oluwabunmi Akande, Zilong Ma, Chenyan Huang, Fangliang He, and Scott Chang
- Abstract
Forest soil CO efflux (F) is a crucial process in global carbon cycling; however, how F respond to disturbance regimes in different forest biomes is poorly understood. We quantified the effects of disturbance regimes on F across boreal, temperate, tropical, and Mediterranean forests based on 1240 observations from 380 studies. Globally, F was increased by 13 to 25% due to climatic perturbations such as elevated CO concentration, warming, and increased precipitation. F was increased by forest conversion to grassland and elevated carbon input by forest management practices but was reduced by decreased carbon input, fire, and acid rain. Disturbance also caused changes in soil temperature and water content, which in turn affected the direction and magnitude of disturbance effects on F. Our results suggest that disturbance effects on F should be incorporated into earth system models to improve the projection of feedback between the terrestrial C cycle and climate change.
- Published
- 2022
39. Divergent responses of symbiotic and asymbiotic N 2 fixation to seawater additions
- Author
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Zilong Ma, Dejun Li, Xibin Sun, Zhenchuan Wang, Hao Chen, Pengpeng Duan, Junhua Yan, and Kongcao Xiao
- Subjects
Soil salinity ,Oceanography ,Sea level rise ,Seawater intrusion ,Seawater ,Biology ,Ecology, Evolution, Behavior and Systematics ,N2 Fixation - Published
- 2021
40. Structural identification and in vitro antioxidant activities of anthocyanins in black chokeberry ( Aronia melanocarpa lliot)
- Author
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Fengmei Zhu, Jiaxuan Li, Zilong Ma, Jun Li, and Bin Du
- Published
- 2021
41. Zinc recovery from Wulagen sulphide flotation plant tail, part II: pilot tests using cyclonic static microbubble flotation column
- Author
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Shuiping Zhong, Xiao Ni, Zilong Ma, Zhian Liang, and Yinfei Liao
- Subjects
Smithsonite ,Chromatography ,chemistry ,Metals and Alloys ,engineering ,Pilot scale ,chemistry.chemical_element ,Environmental science ,Zinc ,engineering.material ,Industrial and Manufacturing Engineering ,Column (data store) - Abstract
Pilot scale flotation tests (maximum capacity 1 mt h−1) on refloating smithsonite from sulphide flotation tail using cyclonic static microbubble flotation column (FCSMC) were carried out at the Wul...
- Published
- 2021
42. Measurement and Correlation of <scp>l</scp>-Phenylalanine Benzyl Ester Hydrochloride Solubility in 11 Individual Solvents and a Methanol + Acetone Binary Solvent System from 283.15 to 323.15 K
- Author
-
Hui He, Ying Guo, Jiaming Han, Jingxuan Qiu, Haishuang Huang, Peng Wang, Yue Zhao, Shen Hu, Zilong Ma, and Haoyou Liu
- Subjects
Solvent system ,chemistry.chemical_compound ,chemistry ,General Chemical Engineering ,Acetone ,Phenylalanine ,General Chemistry ,Methanol ,Solubility ,Ester hydrochloride ,Nuclear chemistry - Published
- 2021
43. Fate of dietary phytochemicals in human gut and interaction with intestinal flora
- Author
-
Bin Du, Zilong Ma, Guang Xin, Yuedong Yang, and Baojun Xu
- Abstract
With the deterioration of the environment and the improvement of human self-protection awareness, the voice of human beings for returning to nature is increasing. There is an increasing interest in regulating the composition and metabolic function of the gastrointestinal microbial community with natural plant diet methods to improve health and prevent or treat diseases. As the “invisible organ” of human beings, the intestinal flora is closely related to human health. Dysbacteriosis can induce a variety of diseases. The regulatory effect of natural plant ingredients on the intestinal flora is expected to be a new treatment for related diseases. The metabolic mechanism of several main components of natural plants in the human body and their influence on the intestinal flora were presented in this paper. Meanwhile, the mechanism of action of intestinal flora in several typical diseases was introduced. In addition, this paper gathered and analyzed previous studies in order to gain insight how plant components can improve diseases by regulating intestinal flora.
- Published
- 2022
44. In-suit ion-imprinted bio-sorbent with superior adsorption performance for gallium(III) capture
- Author
-
Na Chai, Lihui Gao, Shulei Li, Yijun Cao, Zilong Ma, Lingni Li, and Ming Hu
- Subjects
Renewable Energy, Sustainability and the Environment ,Strategy and Management ,Building and Construction ,Industrial and Manufacturing Engineering ,General Environmental Science - Published
- 2023
45. An insight into the glycosidically bound aroma compounds and biological activities in fruits and vegetables
- Author
-
Baojiang He, Jufang Hao, Zilong Ma, Fengmei Zhu, and Bin Du
- Abstract
Glycosides are a major source of untapped flavor in fruits and vegetables. This review aims to present an overview of the isolation and characterized of glycosidically bound aroma compounds in fruits and vegetables. The analytical techniques of glycosidically bound aroma compounds is discussed. The characterization of glycosidically bound aroma compounds is comprehensively included. In addition, the acidic and enzymic hydrolysis of glycosidically bound aroma compounds are reviewed as well as the liberation mechanisms. At last, the different biological activities of glycosidically bound aroma compounds were also summarized.
- Published
- 2022
46. Isoxanthanol has protective and anti-inflammatory effects on subchondral bone deterioration in experimental osteoarthritic rat model
- Author
-
Xin, Li, Jie, Yu, Yan, Zhao, Yating, Bai, Lixin, Fu, Zilong, Ma, and Shuqin, Zhang
- Subjects
Male ,Interleukin-6 ,Plant Extracts ,Anti-Inflammatory Agents ,Nitric Oxide ,Protective Agents ,Xanthium ,Arthritis, Experimental ,Bone and Bones ,Dinoprostone ,General Biochemistry, Genetics and Molecular Biology ,Rats ,Rats, Sprague-Dawley ,Disease Models, Animal ,Mice ,RAW 264.7 Cells ,Osteoarthritis ,Animals ,lipids (amino acids, peptides, and proteins) ,Sesquiterpenes - Abstract
In the present study isoxanthanol was investigated for treatment of monosodium iodoacetate (MIA)-induced osteoarthritis (OA) in vivo. The study demonstrated that isoxanthanol inhibited excessive release of interleukin-6, NO and PGE2 in RAW264.7 cells treated with LPS in dose dependent manner. The effects of isoxanthanol were examined in a rat model of osteoarthritis (OA) and observed to ameliorate inflammatory damage and protect against OA. Moreover, in vivo data also confirmed inhibition of interleukin-6, NO and PGE2 levels in LPS-induced OA-rats. Deterioration of knee subchondral bone in LPS-induced OA-rats was also prevented effectively by isoxanthanol-treatment. Therefore, isoxanthanol prevents subchondral bone deterioration in OA rats via targeting inflammatory processes.
- Published
- 2022
47. Changes in Climate Drive Spatial and Temporal Variation of Wildfire in a Natural Boreal Forest Landscape
- Author
-
Si Chen, Zilong Ma, Daniel Yeboah, and Han Y.H. Chen
- Subjects
History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
48. Climate change and defoliation interact to affect root length across northern temperate grasslands
- Author
-
Scott X. Chang, Diego F. Steinaker, James F. Cahill, Edward W. Bork, Shannon R. White, Scott D. Wilson, and Zilong Ma
- Subjects
0106 biological sciences ,Temperate grassland ,Root length ,Ecology ,Climate change ,Rangeland ,Biology ,Affect (psychology) ,010603 evolutionary biology ,01 natural sciences ,Ecology, Evolution, Behavior and Systematics ,010606 plant biology & botany ,Shoot biomass - Published
- 2020
49. Characteristics of Impulsive Currents Superimposing on Continuous/Continuing Current of Rocket-Triggered Lightning
- Author
-
Zilong Ma, Zhicheng Dong, Xiushu Qie, Mingyuan Liu, Hongbo Zhang, Yunjiao Pu, Rubin Jiang, Zhuling Sun, Hongyan Xing, and Xiao Li
- Subjects
Physics ,business.product_category ,Ground ,020206 networking & telecommunications ,02 engineering and technology ,Mechanics ,Condensed Matter Physics ,Lightning ,Atomic and Molecular Physics, and Optics ,Rocket ,Duration (music) ,Transfer (computing) ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,Current (fluid) ,Geometric mean ,business ,Communication channel - Abstract
Characteristics and mechanism of initial continuous current (ICC) pulses and M components in rocket-triggered lightning were investigated in detailed. The geometric mean current peak, risetime from 10% to 90% peak, half-peak width, and charge transfer of M components were 400 A, 207 μs, 267 μs, and 0.19 C, respectively, exhibiting more pronounced impulsive feature than ICC pulses of which the counterpart parameters were 190 A, 462 μs, 845 μs, and 0.27 C, respectively. A shorter time interval between the prior return stroke (RS) and the following M component (TRS-M) facilitated a stronger M component having larger peak while shorter pulsewidth. In two cases with extremely long lasting ICC and continuing current (CC), 20 Initial continuous current pulses occurred during a 715.3-ms duration and 15 M components occurred during a 218-ms duration. The multiple occurrences of current surges serve to keep the grounding channel active and extend the channel network inside the cloud, and hence prolong the ICC/CC duration. This situation reduced the possibility of RSs thereafter. In addition to the two traditional types of in-cloud discharges that result in M component, we recognized a new scenario that involves a short-term interruption of the upward RS wave and a reactivated breakdown promoted by the residual charge inside the main channel.
- Published
- 2020
50. Carbon accumulation in agroforestry systems is affected by tree species diversity, age and regional climate: A global meta‐analysis
- Author
-
Cameron N. Carlyle, Scott X. Chang, Edward W. Bork, Zilong Ma, and Han Y. H. Chen
- Subjects
Global and Planetary Change ,010504 meteorology & atmospheric sciences ,Ecology ,Agroforestry ,chemistry.chemical_element ,04 agricultural and veterinary sciences ,Soil carbon ,01 natural sciences ,Forest age ,chemistry ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Monoculture ,Tree species ,Carbon ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,Diversity (business) - Published
- 2020
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