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Solubility and solution thermodynamics of ammonium dihydrogen phosphate in the water–methanol system

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2518-2525页

作者： Dejun Xu Dehua Xu Yanjun Zhong Tao Luo Xiushan yang Zhiye Zhang Lin yang Xinlong Wang School of Chemical Engineering Sichuan UniversityChengdu 610065China

The solubility of ammonium dihydrogen phosphate(MAP)in the water–methanol system is essential for antisolvent crystallization *** investigate the effect of methanol on the solubility of MAP in water,the solubility of MAP in the water–methanol system was determined by dynamic method and static equilibrium method at temperatures ranging from 293.2 to 343.2 K at atmospheric *** showed that the solubility of MAP increased with the increase of temperature and the increase of water mole fraction in the water–methanol *** experimental solubility data were correlated with the modified Apelblat equation,the combined nearly ideal binary solvent/Redlich–Kister(CNIBS/R–K)model and the Jouyban–Acree *** calculated results based on these three models were in very good agreement with the experimental data with the average relative deviations of 0.65%,0.97%,and 5.38%,***,the thermodynamic properties of the MAP dissolution process in the water–methanol system,including Gibbs energy change,enthalpy,and entropy were obtained by the Van’t Hoff equation,which can be used to assess the crystallization process.

关键词： Ammonium dihydrogen phosphate Solubility Water–methanol system

Physicochemical analysis of individual atmospheric fine particles based on effective surface-enhanced Raman spectroscopy

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Journal of Environmental Sciences 2019年第1期31卷 388-395页

作者： Zhenli Sun Fengkui Duan Kebin He Jingjing Du Liu yang Hui Li Tao Ma Shuo yang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Fine particles associated with haze pollution threaten the health of more than 400 million people in China. It is therefore of great importance to thoroughly investigate and understand their composition. To determine the physicochemical properties in atmospheric fine particles at the micrometer level, we described a sensitive and feasible surface-enhanced Raman scattering(SERS) method using Ag foil as a substrate. This novel method enhanced the Raman signal intensities up to 10,000 a.u. for ν(NO_3^-) in fine *** SERS effect of Ag foil was further studied experimentally and theoretically and found to have an enhancement factor of the order of ～10~4. Size-fractionated real particle samples with aerodynamic diameters of 0.4–2.5 μm were successfully collected on a heavy haze day,allowing ready observation of morphology and identification of chemical components, such as soot, nitrates, and sulfates. These results suggest that the Ag-foil-based SERS technique can be effectively used to determine the microscopic characteristics of individual fine particles, which will help to understand haze formation mechanisms and formulate governance policies.

关键词： SERS PM2.5 Individual particle Atmospheric

P-Laplace Equation for the Grushin Type Operator

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Acta Mathematica Sinica,English Series 2023年第5期39卷 923-938页

作者： Ji Zheng HUANG Xin Xin yang School of Science Beijing University of Posts and TelecommunicationsBeijing 100876P.R.China

Let Gλ,λ>0,be a Grushin type operator on Rn×*** this paper,we will first establish existence and uniqueness for the p-Laplace equation for Gλ,then we prove the regularity of *** order to prove our results,we will ... 详细信息

关键词： solutions. inequality uniqueness

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Effects of the Rainfall-Triggered Lisse Effect on the Stability of Loess Slopes

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Journal of Earth Science 2024年第4期35卷 1254-1262页

作者： Zhizhou yang Donghui Cheng Jun Xia School of Water and Environment Chang’an UniversityXi’an710054China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education Chang’an UniversityXi’an710054China Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources Chang’an UniversityXi’an710054China Key Laboratory of Water Cycle&Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China State Key Laboratory of Water Resources&Hydropower Engineering Sciences Wuhan UniversityWuhan430000China

This paper coupled a water-air two-phase hydrodynamic(WATPH)model with the Iverson’s method to analyze the influence of the Lisse effect on the fast groundwater pressure(P_(w))response and the slope ***,the sensitivities of the driving force and loess soil parameters were *** showed that the WATPH model simulated the height and rise of the depth to the water table reasonably *** depth to water table before rainfall(H0)had a significant impact on the Lisse effect and the slope *** the H_(0) was less than approximately 1 m,the rainfall triggered a significant Lisse effect and decreased the slope factor of safety(F_(s)).When the rainfall intensity(R_(i))was higher than the saturated hydraulic conductivity(K_(s)),the Lisse effect and the F_(s) slightly changed with the increase of the R_(i),and the slope tended to be unstable with continuous *** increasing K_(s),the Lisse effect noticeably increased,and the minimum F_(s) quickly *** analysis of the normalized sensitivity coefficient revealed that H_(0) had a dramatic impact on the Lisse effect and loess slope *** different R_(i) and K_(s) values had prominent influences on the Lisse effect and slight impacts on F_(s).

关键词： Lisse effect landslides safety factor rainfall

Paraffin section observation of flower bud differentiation of Chimonanthus praecox in Kunming and comparison of the differentiation processes in different regions,China

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Horticultural Plant Journal 2022年第2期8卷 221-229页

作者： Sijin Li Nan yang Longqing Chen Southwest Engineering Research Center for Landscape Architecture(State Forestry and Grassland Administration) Yunnan Province Engineering Research Center for Functional Flower Resources and Industrialization TechnologySouthwest Forestry UniversityKunming 650224China

Chimonanthus praecox is an important ornamental plant and cut flower material in *** blooms in the freezing winter and its flower emits charming ***,in different region the flowering time is *** order to understand the flowering mechanism of *** in the winter,we studied the flower bud differentiation in Spring City-Kunming using paraffin sectioning method in the present *** we compared the differentiation process difference from different *** was found that the temperature is the key factor for its flower bud differentiation and blossom of *** the process of bud differentiation,the temperature 20℃was the optimum for inducing changes from vegetative axillary buds to reproductive buds and subsequent morphological differentiation in *** in the first three differentiation periods—tepal primordial stage,staminal primordial stage and pistil primordial stage,Kunming took the shortest time to finish the process due to very rapid temperature rise to 20℃,whereas,in Zhengzhou the time for these differentiations was the longest,which may be caused by the slow temperature *** May,the high temperature stress forced the flower buds into the first long dormant period in all regions except *** Kunming,the average temperature was only 20–25℃,so the flower bud continued to *** all regions,Kunming is the first to complete whole flower bud differentiation even on the early August,and started the second dormancy very early but very *** the other regions,the plants went through a shorter dormancy and the low temperature broke the dormancy *** the plants of Kunming spent a longer period for the low ***,the low temperature less than 10℃is a key factor to breaking the second *** the regular effects of temperature on flower bud differentiation and blossom is very helpful for florescence regulation of ***.

关键词： Chimonanthus praecox Flower bud differentiation Paraffin section Temperature

The diagram category of framed tangles and invariants of quantized symplectic group

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Science China Mathematics 2020年第4期63卷 689-700页

作者： Zhankui Xiao Yuping yang Yinhuo Zhang School of Mathematical Sciences Huaqiao UniversityQuanzhou 362021China Department of Mathematics&Statistics University of HasseltUniversitaire CampusDiepenbeek 3590Belgium

In this paper,we present a categorical version of the first and second fundamental theorems of the invariant theory for the quantized symplectic *** methods depend on the theory of braided strict monoidal categories w... 详细信息

关键词： diagram category of framed tangles invariant theory quantized symplectic group BirmanMurakami-Wenzl algebra

The combination of eddy thermal effect of biodegradable magnesium with immune checkpoint blockade shows enhanced efficacy against osteosarcoma

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Bioactive Materials 2023年第7期25卷 73-85页

作者： Jun Ge Nailin yang Yuqi yang Hao Yu Xiaoyuan yang Yingjie Wang Tianyi Wang Shuning Cheng Yuanjie Wang Zhihui Han Yun Teng Jun Zou Huilin yang Liang Cheng Department of Orthopedic Surgery The First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhouJiangsuChina Department of Neurosurgery The First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina

Osteosarcoma(OS)patients have a poor prognosis due to its high degree of heterogeneity and high rate of *** hyperthermia therapy(MHT)combined with immunotherapy is an effective strategy to treat solid and metastatic ***,we combined biodegradable magnesium(Mg)macroscale rods,which acted as an eddy thermo-magnetic agent under a low external alternating magnetic field,and immunotherapy to achieve a radical cure for *** eddy thermal effect(ETE)of the Mg rods(MgR)showed outstanding cytotoxic effects and enhanced the maturation of dendritic cells(DCs),and the mild MHT induced the immunogenic cell death(ICD)in the OS *** with immune checkpoint blockade(ICB)therapy,we obtained an excellent curative effect against OS,and a further evaluation demonstrated that the local MHT induced by the MgR increased T cells infiltration and the polarization of M1 ***,the biodegradable MgR also promoted bone *** work highlighted the uneven ETE mediated by the biodegradable MgR induced a comprehensive immunologic activation in the OS tumor microenvironment(TME),which would inspire the application of MHT for the effective treatment of OS.

关键词： Osteosarcoma Eddy thermal effect Magnesium rods(MgR) Osteosarcoma therapy Tumor microenvironment(TME) immunotherapy

Glutamine metabolism in Th17/Treg cell fate:applications in Th17 cell-associated diseases

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Science China(Life Sciences) 2021年第2期64卷 221-233页

作者： Guan yang Yaoyao Xia Wenkai Ren Guangdong Laboratory of Lingnan Modern Agriculture Guangdong Provincial Key Laboratory of Animal Nutrition ControlNational Engineering Research Center for Breeding Swine IndustryCollege of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642China Department of Pathology Microbiology and ImmunologyVanderbilt University School of MedicineNashvilleTN 37232USA

Alteration in the Th17/Treg cell balance is implicated in various autoimmune diseases and these disease-associated *** investigations have shown that glutamine metabolism regulates the differentiation of Th17 and Treg *** we summarize the mechanisms by which glutamine metabolism regulates Th17/Treg cell *** examples of a glutamine metabolism-dependent modulation of the development and progression of several Th17/Treg cell-associated diseases are provided *** review will provide a comprehensive understanding of the importance of glutamine metabolism in the fate of Th17/Treg cell differentiation.

关键词： glutamine Th17 cells Treg cells mTOR UDP-GlcNAc

Extended finite element methods for optimal control problems governed by Poisson equation in non-convex domains

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Science China Mathematics 2021年第8期64卷 1917-1934页

作者： Tao Wang Chaochao yang Xiaoping Xie School of Mathematics Sichuan UniversityChengdu 610064China Current address:School of Science Chongqing University of TechnologyChongqing 400054China

This paper analyzes two extended finite element methods(XFEMs)for linear quadratic optimal control problems governed by Poisson equation in non-convex *** follow the variational discretization concept to discretize the continuous problems,and apply an XFEM with a cut-off function and a classic XFEM with a fixed enrichment area to discretize the state and co-state *** error estimates are derived for the state,co-state and *** results confirm our theoretical results.

关键词： extended finite element method optimal control non-convex domain variational discretization concept