期刊:
Computer-Aided Civil and Infrastructure Engineering,2024年 ISSN:1093-9687
通讯作者:
Zhou, GX
作者机构:
[Yang, Yixin; Sun, Lixiang; Zhou, Guoxiong; Chen, Aibin; Zhang, Yukai] Cent South Univ Forestry & Technol, Coll Comp & Informat Engn, Changsha 410004, Peoples R China.;[Cai, Weiwei] Jiangnan Univ, Coll Artificial Intelligence & Comp Sci, Wuxi, Peoples R China.;[Li, Liujun] Univ Idaho, Dept Soil & Water Syst, Moscow, ID USA.
通讯机构:
[Zhou, GX ] C;Cent South Univ Forestry & Technol, Coll Comp & Informat Engn, Changsha 410004, Peoples R China.
摘要:
The segmentation accuracy of bridge crack images is influenced by high-frequency light, complex scenes, and tiny cracks. Therefore, an integration-competition network (complex crack segmentation network [CCSNet]) is proposed to address these problems. First, a grayscale-oriented adjustment algorithm is proposed to solve the high-frequency light problem. Second, an integration-competition mechanism is proposed to detach complex backgrounds and grayscale features of cracks. Finally, a tiny attention mechanism is proposed to extract the shallow features of tiny cracks. CCSNet outperforms seven state-of-the-art crack segmentation methods in both generalization and comparison experiments on self-built dataset and four public datasets. It also achieved excellent performance in practical bridge crack tests. Therefore, CCSNet is an effective auxiliary method for lowering the cost of bridge safety detection.
通讯机构:
[Qiu, RH ; Xiong, BQ ; Chen, Y ] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China.;Hunan Univ Chinese Med, Sch Med, Dept Physiol, Changsha 410208, Peoples R China.;Hunan Inst Sci & Technol, Dept Chem & Chem Engn, Yueyang 414006, Peoples R China.
摘要:
In this study, we present a nickel-catalyzed reductive C-(sp(3))-Sb coupling of unactivated alkyl chlorides with chlorostibines. This approach is highly versatile, tolerating various functional groups such as acetal, alkene, nitrile, amine, ester, silyl ether, thioether, and various heterocyclic compounds. Notably, the late-stage modification of bioactive molecules and the satisfactory anticancer activity against cancerous MDA-MB-231 also demonstrate the potential application.
期刊:
Theoretical and Applied Climatology,2024年 ISSN:0177-798X
通讯作者:
Wang, HQ
作者机构:
[Wang, HQ; Liu, Xinyu; Wang, Hanqing; Zhu, Dongnan; Liu, Zhenming; He, Junyi] Univ South China, Sch Civil Engn, Hengyang, Peoples R China.;[Wang, HQ; Liu, Xinyu; Wang, Hanqing; Zhu, Dongnan; Liu, Zhenming; He, Junyi] Natl & Local Joint Engn Res Ctr Airborne Pollutant, Hengyang, Peoples R China.;[Wang, HQ; Wang, Hanqing] Cent South Univ Forestry & Technol, Sch Civil Engn, Changsha, Peoples R China.
通讯机构:
[Wang, HQ ] U;Univ South China, Sch Civil Engn, Hengyang, Peoples R China.;Natl & Local Joint Engn Res Ctr Airborne Pollutant, Hengyang, Peoples R China.;Cent South Univ Forestry & Technol, Sch Civil Engn, Changsha, Peoples R China.
关键词:
WRF;Deep learning;Downscaling
摘要:
The Weather Research and Forecasting (WRF) model improves the accuracy of climate prediction and obtains meteorological parameters for fine grids; however, fine-grid climate predictions for different time periods and regions often consumes a great amount of computational resources. In this letter, the Multi Residual Attention Generative Adversarial Network (MRA-GAN) is proposed based on the generative adversarial network; the technique is applied to restore a simulated image from a coarse-grid WRF model to a simulated image from a fine-grid WRF model. The fine-grid image generated by MRA-GAN is very similar to the original fine-grid image. When compared with Super-Resolution Wasserstein Generative Adversarial Network with Gradient Penalty (SRWGAN-GP), the average of peak signal-to-noise was improved by approximately 0.54dB, and the average structural similarity index was improved by approximately 3%. After comparing the downscaling results of temperature, wind speed, and relative humidity of various models with the original data, the results show that MRA-GAN has the highest correlation, the lowest data dispersion, and the smallest data error. The trained network model was able to efficiently transform the coarse-grid meteorological fields from different time periods and different simulation variables into fine-grid meteorological fields, and it greatly reduced the computational workload.
摘要:
Bacteria and fungi are core microorganisms in diverse ecosystems, and their cross-kingdom interactions are considered key determinants of microbiome structure and ecosystem functioning. However, how bacterial-fungal interactions mediate soil organic carbon (SOC) dynamics remains largely unexplored in the context of artificial forest ecosystems.Here, we characterised soil bacterial and fungal communities in four successive planting of Eucalyptus and compared them to a neighbouring evergreen broadleaf forest. Carbon (C) mineralisation combined with five C-degrading enzymatic activities was investigated to determine the effects of successive planting of Eucalyptus on SOC dynamics.Our results indicated that successive planting of Eucalyptus significantly altered the diversity and structure of soil bacterial and fungal communities and increased the negative bacterial-fungal associations. The bacterial diversity significantly decreased in all Eucalyptus plantations compared to the evergreen forest, while the fungal diversity showed the opposite trend. The ratio of negative bacterial-fungal associations increased with successive planting of Eucalyptus due to the decrease in SOC, ammonia nitrogen (NH4+-N), nitrate nitrogen (NO3--N) and available phosphorus (AP). Structural equation modelling indicated that the potential cross-kingdom competition, based on the ratio of negative bacterial-fungal correlations, was significantly negatively associated with the diversity of total bacteria and keystone bacteria, thereby increasing C-degrading enzymatic activities and C mineralisation.Synthesis and applications: Our results highlight the regulatory role of the negative bacterial-fungal association in enhancing the correlation between bacterial diversity and C mineralisation. This suggests that promoting short-term successive planting in the management of Eucalyptus plantations can mitigate the impact of this association on SOC decomposition. Taken together, our study advances the understanding of bacterial-fungal negative associations to mediate carbon mineralisation in Eucalyptus plantations, giving us a new insight into SOC cycling dynamics in artificial forests.
摘要:
With the increase in people's living standards, the number of patients suffering from liver injury keeps on increasing. Traditional diagnostic methods can no longer meet the needs of early and accurate diagnosis due to their limitations in application. However, fluorescent probes based on different fluorophores and nanomaterials have been gradually lighting up medical research due to their unique properties, such as high specificity and non-invasiveness. In addition, accurate identification of the different types of liver injury biomarkers can significantly improve the level of early diagnosis. Therefore, this review reviews the fluorescent probes used in the detection of biomarkers of liver injury over recent years and briefly summarizes the corresponding biomarkers of different types of liver injury. Impressively, this review also lists the structures and the response mechanisms of the different probes, and concludes with an outlook, suggesting directions in which improvements can be made. Finally, we hope that this review will contribute to the further development of fluorescent probes for the early diagnosis and assessment of liver injury. With the increase in people's living standards, the number of patients suffering from liver injury keeps on increasing.
摘要:
Amidst the progressive depletion of non-renewable resources on a global scale, the expedited development of green and sustainable materials has become an imperative. Cellulose, a recognized environmentally friendly substance, presents itself as a solution owing to its low cost, abundant availability, facile degradability, and renewability. Its potential to gradually supplant petroleum resources, thereby yielding a diverse array of high value-added materials, is well acknowledged. Herein, we present an exploration of the utilization of cellulose as a precursor, rooted in its fundamental properties. Moreover, we undertake a comprehensive review of the preparation techniques and structural property characteristics exhibited by mainstream cellulose-based functional materials. These materials notably include cellulose spheres, cellulose hydrogels, cellulose aerogels, cellulose films, and cellulose-derived carbon materials. Following this extensive review, our article accentuates the strides made in the field of cellulose-based functional materials across diverse pertinent domains. These encompass materials essential for adsorption and separation purposes, biomedical devices, electrode capacitive applications, and the emerging landscape of smart electronic devices. Concluding our discourse, we address the challenges that lie ahead and outline the potential future prospects for the development of cellulose-based functional materials.
摘要:
This paper proposes a pre-processing method for heart sound screening and extracts the high-order spectral feature of phonocardiogram. Moreover, a multi-convolutional neural network (mCNN) is constructed to achieve the classification of normal, aortic stenosis, mitral regurgitation, mitral stenosis, and mitral valve prolapse. First, the heart sound recordings are down-sampled, denoised by wavelet transform, and normalized. Second, a new heart sound screening algorithm is proposed. The waveform of the heart sound recording is segmented and saved as an image which is performed by the gray-scale processing to calculate the amplitude of the heart sound. The extremely noisy heart sound segments are screened out based on the amplitude information, and the remaining heart sound segments are spliced as pure heart sound recordings. After 50% superposition segmentation of the heart sound recordings, high-order spectral features are extracted and image data are stored. Finally, a 34-layer mCNN is specifically designed to boost the performance of heart sound classification through multi-layer dimensionality reduction. Experimental results show that the proposed method has superior performance compared with the existing one. For the two-category dataset, the accuracy with and without PCG screening is 97.99% and 99.42%, respectively. For the five-category dataset, the average accuracy is 99%.
摘要:
Background and ObjectivesRice bran is enriched with bioactive compounds, which makes it more competitive as a functional food raw material. The stabilization of rice bran can inhibit the activity of endogenous enzymes, reduce its oxidation sensitivity, and change its physical and chemical properties, providing more possibilities for its application in the food industry. In this study, rice bran from five stabilization treatments (atmospheric pressure cooking, high-pressure cooking, atmospheric steam, microwave heating, and extrusion cooking) were investigated for their effect on the gel properties of indica rice flour.FindingsStabilized rice bran could enhance the hydration properties and increase the enthalpy value of rice flour. The gelatinization properties indicated that the viscosity and fluidity of the rice paste were increased, and the aggregation and rearrangement of rice starch were promoted. From the rheological properties, stabilized rice bran enhanced the viscoelasticity of the rice flour gel. In addition, the stabilized rice bran could also reduce the yield of freeze-thawing water of the rice flour gel. Rice bran with thermal treatments can significantly improve the gel properties of indica rice flour.ConclusionsIndica rice flour mixed with stabilized rice bran showed significant improvements in hydration, gelatinization, rheological properties, and freeze-thaw stability.Significance and NoveltyIt is potential for the application of the gel from rice flour with stabilized rice bran in the starch-based food industry.
通讯机构:
[Luo, FJ ] C;Cent South Univ Forestry & Technol, Coll Food Sci & Engn, Lab Mol Nutr, 498 Southern Shaoshan Rd, Changsha 410004, Hunan, Peoples R China.;Natl Engn Res Ctr Rice & Byproduct Deep Proc, 498 South Shaoshan Rd, Changsha 410004, Hunan, Peoples R China.
摘要:
Hyperlipidemia is a common clinical disorder of lipid metabolism in modern society and is considered to be one of the major risk factors leading to cardiovascular-related diseases. Germinated brown rice (GBR) is a typical whole grain food. The lipid-lowering effect of GBR has received increasing attention, but its mechanism of action is not fully understood. The gut microbiota has been proposed as a novel target for the treatment of hyperlipidemia. The aim of this study was to investigate the effects of GBR on the gut microbiota and lipid metabolism in high-fat diet (HFD)-fed C57BL/6J mice. The effect of GBR on hyperlipidemia was evaluated by measuring blood lipid levels and by pathological examination. The gut microbiota was detected by 16S rRNA sequencing, and the protein and mRNA expression levels involved in cholesterol metabolism were detected by western blotting and RT-qPCR to find potential correlations. The results showed that GBR supplementation could effectively reduce the levels of TC, TG, LDL-C and HDL-C in the serum and alleviate the excessive accumulation of fat droplets caused by HFD. Moreover, GBR intervention improved HFD-fed gut microbiota disorder via increasing the diversity of the gut microbiota, reducing the Firmicutes/Bacteroidetes ratio, and improving gut barrier damage. In addition, GBR could inhibit endogenous cholesterol synthesis and promote cholesterol transport and excretion. These findings suggest that GBR may be a competitive candidate for the development of functional foods to prevent abnormal lipid metabolism. GBR could alleviate hyperlipidemia and its mechanism in the HFD-fed mice.
摘要:
Scene classification of very-high resolution (VHR) remote sensing images is a challenging research hotspot. It is difficult to extract salient features because of the characteristics of remote sensing images, such as large spatial range changes and complex scenes. In addition, the effective combination of high-level semantic information and low-level contour information is also a major difficulty at present. In order to solve these problems, we proposed a new end-to-end saliency multi-feature extraction network (SMFE-Net) based on VGG16 and long short-term memory (LSTM) to extract salient features and effectively integrate high-level features with low-level features. Firstly, we design an adaptive memory network (AMN) based on the rectangular combination of LSTMs to capture rich features of high and low levels. The AMN not only provides supplementary information but also focuses on key areas, thus discarding non-critical information. Secondly, in order to realize adaptive feature extraction, the sequential connection of channel attention (CA) and spatial attention (SA) is placed in the high-level feature extraction subnetwork, whose outputs are multiplied by the weights of the last feature map layer of VGG16. Finally, the outputs of AMN and the attention-weighted features are concatenated and inputted to the fully connected layer for the scene classification of the VHR remote sensing image. To verify the validity of the proposed SMFE-Net, the UC Merced (UCM) land-use dataset, the Aerial Image Dataset (AID), and the OPTIMAL-31 (OPTL) dataset are selected as the experimental materials. Experimental results have demonstrated that the proposed SMFE-Net is superior to several most advanced methods.
摘要:
Wolbachia is a maternally inherited endosymbiont of the phylum a-Proteobacteria that is found widely in arthropods and nematodes. Cytoplasmic incompatibility (CI) is the commonest endosymbiotic manipulation among arthropods, namely reduced embryo viability when Wolbachia-infected males fertilize Wolbachia-uninfected females.In this study, endosymbiont infection was investigated and crossing experiments were performed in the wing-dimorphic cricket Velarifictorus aspersus (Walker) (Orthoptera: Gryllidae) to clarify the effects of Wolbachia on host reproduction.All the tested individuals were infected with two Wolbachia strains, wAsp-a and wAsp-f, which belong to supergroup A and supergroup F, respectively.There were no obvious differences in the duration of nymph development or the proportions of females between the Wolbachia-infected and Wolbachia-free lines. However, crossing Wolbachia-infected males with uninfected females reduced the hatching rate by 28% compared with that when infected males were crossed with infected females. The number of eggs laid by Wolbachia-free females was significantly lower than laid by infected females, either mating with infected males or uninfected males.These results suggest that Wolbachia induced incomplete CI and enhanced female fertility in V. aspersus. Because no homologous cifA and cifB genes, which are involved in CI, were found in supergroups C, D and F, it might be considered that the CI of V. aspersus was induced by strain wAsp-a of supergroup A. Moreover, the significant increase in the density of wAsp-a Wolbachia with nymph development might be related to the regulation of CI.
摘要:
Strong, lightweight, and shape-memory cellulose aerogels have great potential in multifunctional applications. However, achieving the integration of these features into a cellulose aerogel without harsh chemical modifications and the addition of mechanical enhancers remains challenging. In this study, a strong, lightweight, and water-stimulated shape-memory all-cellulose aerogel (ACA) is created using a combination strategy of partial dissolution and unidirectional freezing from bamboo. Benefiting from the firm architecture of cellulose microfibers bridging cellulose nanofibers /regenerated cellulose aggregated layers and the bonding of different cellulose crystal components (cellulose I beta and cellulose II), the ACA, with low density (60.74 mg cm-3), possesses high compressive modulus (radial section: 1.2 MPa, axial section: 0.96 MPa). Additionally, when stimulated with water, the ACA exhibits excellent shape-memory features, including highly reversible compression-resilience and instantaneous fold-expansion behaviors. As a versatile scaffold, ACA can be integrated with hydroxyapatite, carboxyl carbon nanotubes, and LiCl, respectively, via a simple impregnation method to yield functionalized cellulose composites for applications in thermal insulation, electromagnetic interference shielding, and piezoresistive sensors. This study provides inspiration and a reliable strategy for the elaborately structural design of functional cellulose aerogels endows application prospects in various multifunction opportunities. A combination strategy of partial dissolution and unidirectional freeze is developed for the fabrication of strong, lightweight, and shape-memory all-cellulose aerogel with the unique anisotropic structure of cellulose microfibers bridging nanofibers/regenerated cellulose aggregated layers. As a versatile scaffold, the aerogel holds great promise for applications in thermal insulation, electromagnetic interference shielding, and piezoresistive sensors.image
摘要:
Shrubbery and young plantations, with a large number of tree species, take up a broad area in subtropical Chinese forests and contribute a significant part to forest biomass and carbon (C) stocks. However, the biomass and C stocks of shrubbery and young plantations were generally underestimated or excluded in forest biomass calculations due to the scarce of standard equations for estimating biomass. The aim of this study was to develop appropriate regression equations for biomass estimation of shrubbery and young plantations. A total of 108 individuals of 15 most widespread shrub and young tree species were sampled by destructive harvesting, and the dry weight of each component of trees, i.e., foliage, branch, stem and root were obtained. The dry biomass of each component was correlated with plant height (H), basal diameter of stem (D), crown area (CA) and their composite variables (DH)-H-2 and CV (CA x H) by using seemingly uncorrelated regression, and the best fitted model was chosen according to the determination coefficient (R-2), root mean squared error (RMSE), Akaike's information criterion (AIC) and percent relative standard errors (PRSE) less than 25%. In the species-specific equations, H, D or (DH)-H-2 were used as the appropriate independent variables in most of the equations, and only a few of them were CA or CV. In the multiple species equations, H was an important variable to predict the biomass, but the predictors of biomass equation for different functional groups or life forms were different due to diversity of external morphology. The species-specific equations had low biases, while the general equations for functional groups and life forms showed comparable biases, and the general equations for all species had the highest prediction biases. Therefore, general equations for functional groups or life forms are recommended to estimate biomass for species without species-specific allometric equations.
摘要:
Abstract: Spicy wheat flour gluten sticks are delicious and affordable puffed snacks for young adults and even minors in China, and have a relatively simple nutritional quality. L. edodes powder (LEP) is rich in nutrients and boasts a variety of biological activities. This study evaluated the effects of different concentrations of LEP addition on the quality of wheat flour gluten sticks. The gelatinization results of the products showed that the peak viscosity decreased from 454 cP to 251 cP; the breakdown value decreased from 169 cP to 96 cP; and the setback value decreased from 381 cP to 211 cP. With the increase in LEP, the radial expansion rate (RER) of L. edodes gluten sticks (LSGS) first increased and then decreased, reaching a maximum value of 1.388 in the 10% LEP group. The oil absorption rate (OAR) of LSGS increased from 5.124% to 14.852% with the increase in the amount of LEP. Additionally, texture profile analysis showed that the hardness value increased from 1148.898 to 2055.492 g; the chewiness value increased from 1010.393 to 1499.233; and the springiness value decreased from 1.055 to 0.612. Through X-ray diffraction (XRD), it was found that the crystal type was transformed from A-type crystal to B-type and V-type crystals. Low field nuclear magnetic resonance (LF-NMR) results showed that the moisture distribution in the products was basically bound water. The scanning electron microscopy (SEM) results showed that, with the increase in the LEP amount, the surface of the products changed from rough to smooth. Sensory evaluation results indicated that the products with 10% LEP helped to maintain better taste and quality of LSGS, with an average score of 7.628, which was the most popular among consumers. This study not only increases the possible raw materials for use in extruded puffed food, but also provides a new possibility for the production of high-quality edible fungi extruded products. Keywords: gluten sticks; L. edodes powder; wheat flour; extrusion puffing
摘要:
Abstract: In this paper, the performance and emission characteristics of a diesel engine were investigated with varying ratios of tung oil-based biodiesel blends (B10, B20, and B50) and neat diesel under different operating conditions. The experimental results showed that the addition of biodiesel blends had different effects on engine power and torque depending on the blend ratio. B10 displayed a slight increase in power and torque, which increased by 1.9% and 6.6%. At the same time, B20 and B50 showed declines slightly. The fuel consumption rate increased slightly with an increasing percentage of biodiesel added. In general, all the blends exhibited significantly lower emissions of CO, NOX, HC, and smoke compared to neat diesel. B10 displayed the most notable reduction of CO emissions, with a 42.86% decrease at medium to high loads. NOX emissions of tung oil-based biodiesel blends were reduced at all load conditions except for B50. In addition, HC emissions were all reduced, especially for B20, which led to a 27.54% reduction at 50% load. Among all the tested blends, B50 showed the greatest decrease in smoke emissions of 38.05% compared to neat diesel at 2000 rpm. The research concluded that using biodiesel fuels from renewable resources, such as tung oil, presents a promising environmentally friendly alternative fuel option. Keywords: biodiesel; tung oil; diesel engine; performance; exhaust emissions
摘要:
The issue of white pollution has gained more attention in recent years on a global scale. Using fast-growing wood and plastic waste to produce wood-plastic composites can effectively increase the plastic recovery rate while relieving the pressure of structural shortage of wood resources in many countries. Hence, this study demonstrates an innovative approach to prepare a good-quality wood-plastic laminates based on wood-plastic composites. Poplar veneer was first pretreated with microwave-assisted acetic acid followed by a one-step thermal forming process with powdered polyethylene (PE) to produce the glue-free wood-plastic laminates. It was found that the pre-treated composite has a tensile strength of up to 280 MPa and specific strength of up to 205.98 kNm/kg. The excellent mechanical properties can be attributed to the mechanical interlock be-tween wood fibre and polyethylene, plus the closer bond among the fibres induced by cell wall collapses during hot-pressing. Furthermore, the water contact angle of the composite surface remains at about 84 degrees after 10 s. That suggests its good surface waterproof performance which is attributed to the partial degradation of hemicellulose during the pretreatment and the coating of wood fiber with polyethylene. Overall, we have developed glue-free, high-strength, and heat -resistant wood-plastic laminates applicable to interior furniture and outdoor building facilities. This is imperative for protecting the ecological environment and reducing the pressure on structural shortages of wood resources worldwide.
期刊:
European Journal of Forest Research,2023年142(4):823-835 ISSN:1612-4669
通讯作者:
Yan, W.;Chen, X.
作者机构:
[Lei, Junjie; Li, Rujie; Yan, Wende] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Natl Engn Lab Appl Forest Ecol Technol Southern Ch, 498 South Shaoshan Rd, Changsha 410004, Hunan, Peoples R China.;[Peng, Yuanying] Lewis Univ, Coll Arts & Sci, Romeoville, IL 60446 USA.;[Cao, Juan] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China.;[Zhou, Ting; Shi, Xiao; Jia, Qiang] China Int Engn Consulting Corp, Ecol Tech Res Inst, Beijing 100085, Peoples R China.;[Chen, Xiaoyong] Governors State Univ, Coll Arts & Sci, One Univ Pkwy, University Pk, IL 60484 USA.
通讯机构:
[Wende Yan] N;[Xiaoyong Chen] C;National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, China<&wdkj&>College of Arts and Sciences, Governors State University, University Park, USA
关键词:
Phosphorus fractions;Evergreen broad-leaved forest;Chinese fir plantation;Seasonal patterns
通讯机构:
[Zeng, DW ] C;Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.
摘要:
A ZnSO4 electrolyte solution with impuritysalts suchas MnSO4 and MgSO4 is often used in zinc hydrometallurgicalprocesses over a wide temperature range. CaSO4 center dot 2H(2)O(s) scaling and fluorine corrosion are two encountered problemsin the process. Understanding the CaF2(s) solubility behaviorin MSO4 (M = Zn, Mn, Mg) aqueous solutions at various temperatureshelps remove Ca2+ and F- ions from thesolution. However, CaF2(s) solubility data, especiallyat temperatures >298 K, have not been published yet. In this work,CaF2(s) solubilities in the CaF2-CaSO4-MSO4-H2O (M = Zn, Mn,Mg) quaternary systems and its subsystems of the CaF2-MSO4-H2O (M = Zn, Mn, Mg) at 348.15 K and theCaF(2)-CaSO4-MSO4-H2O (M = Zn, Mg) quaternary systems and the CaF2-MgSO4-H2O ternary system at 298.15 K are systematicallymeasured. The results show that the CaF2(s) solubilityin the MSO4 (M = Zn, Mn, Mg) aqueous solution of a certainconcentration at 348.15 K is considerably higher than that at 298.15K. At 298.15 and 348.15 K, the salting-in effect of MSO4 (M = Zn, Mn, Mg) on CaF2(s) solubility is enhanced withthe order ZnSO4 < MnSO4 < MgSO4. At both temperatures, CaF2(s) solubilities in CaSO4 center dot 2H(2)O(s)- or CaSO4(s)-saturatedMSO(4) (M = Zn, Mn, Mg) aqueous solutions are generally lowerthan those in pure MSO4 (M = Zn, Mn, Mg) aqueous solutions.Particularly, the salting-in effect of MgSO4 on CaF2 is so strong that CaF2(s) dissolves completelyand is converted to CaSO4 center dot 2H(2)O(s) and MgF2(s) in a concentrated MgSO4 aqueous solution. Hence,this study indicates that high temperatures and high salt concentrationsincrease the CaF2(s) solubility, making the removal ofCa(2+) and F- ions from the system challenging.Further, the existence of impurity salts MnSO4 and MgSO4 makes it more difficult.