通讯机构：
[Xing Peng] K;[Yunjun Mei] S;Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University, Wuhan 430079, PR China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China
摘要：
This study modified microscale zero valent iron (mZVI) using hydrophilic sodium carboxymethyl cellulose (CMC) via mechanical ball milling method, which was donated as CMC-mZVI, and compared the phosphate removal performance of mZVI and CMC-mZVI. Characterization results of X-ray powder diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), EDS-mapping images of CMC-mZVI demonstrated that the dominant crystalline structure of mZVI did not alter significantly after the ball-milling process and CMC could be adsorbed on the surface of mZVI. Further phosphate (PO43-) removal experimental results revealed that the PO43- removal percentage of CMC-mZVI within 360 min was 99.99 %, which was much higher than that of mZVI (75.23 %). Subsequently, this study analyzed the concentration of ferrous ions and total iron ions dissolved by mZVI and CMC-mZVI, compared the high resolution X-ray photoelectron spectroscopy (HR-XPS) of mZVI and CMC-mZVI before and after the phosphate removal, and characterized the affinity of CMC-mZVI (or mZVI) to water by testing the static contact angle between CMC-mZVI (or mZVI) and water. The above results suggested that the existence of CMC on the surface of mZVI could promote the hydrophilic property of mZVI, resulting the enhancement of ferrous ions and total iron ions dissolution by 8 and 8.78 times than that of mZVI, and the rapid co-precipitation of phosphate. This study provided an environmentally friendly and effective method to improve the reactivity of commercial mZVI powder, and contributed to the wide application of mZVI technology in the field of environmental remediation.
期刊：
Journal of Soils and Sediments,2023年23(7):2951-2961 ISSN：1439-0108
通讯作者：
Chunlei Song
作者机构：
[Li, Jianfen; He, Yun; Li, Hui; Shen, Wenjuan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430073, Peoples R China.;[Song, Chunlei; Zhou, Yiyong; Cao, Xiuyun] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Key Lab Algal Biol, 7 Donghu South Rd, Wuhan 430072, Peoples R China.;[Huang, Daizhong] Ecol & Environm Monitoring Ctr Dongting Lake Hunan, Yueyang 414000, Peoples R China.
通讯机构：
[Chunlei Song] S;State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
摘要：
PurposeSediment internal nutrient loading plays an important role in algal blooms. Thus, understanding the specific characteristics of nutrient (nitrogen (N) and phosphorus (P)) recycling from sediment is important for clarifying the processes and mechanisms of cyanobacterial growth and succession.Materials and methodsSediments and water samples were collected monthly from five sampling sites in Lake Chaohu for 1 year. N and P concentrations in surface and interstitial water were determined, and fractions of sediment organic matter, P, and iron were quantified. P adsorption characteristics were modeled with adsorption isotherms.Results and discussionDolichospermum was the dominant bloom species in the western lake in April, followed by Microcystis from May to September in the whole lake. The impulsive regeneration and release mode from iron-bound P and ammonium (NH4+-N) regeneration from sediment in spring triggered the Dolichospermum bloom. In early summer, continuous P release potential as well as nitrate accumulation and NH4+-N deficiency due to NH4+-N prior assimilation by Dolichospermum jointly drove the transition from Dolichospermum to Microcystis due to the energy saving and competitive advantage of rapid uptake and storage of inorganic P as well as a wide range of N utilization forms for Microcystis. All these facts put the Dolichospermum towards common N and P stress. Furthermore, in summer, NH4+-N rapid regeneration from organic algal detritus remineralization due to the decline of Dolichospermum developed Microcystis blooms.ConclusionsThe specific mode and pathway of N and P recycling from sediment determined the dominant algal species based on the particular N and P utilization strategies of the algae. Pulsed and a vast amount of P release facilitated the Dolichospermum growth, while continuous and a small quantity of P release was in favor of Microcystis growth. Organic N hydrolysis from Dolichospermum detritus further supported the development of a Microcystis bloom.
作者机构：
[Li, Xiaoqian; Wang, Zi; Du, Xiubo; Zhang, Huajie; Han, Shuangxue; He, Zhijun; Li, Nan; Liu, Qiong; Tu, Sixin; Shen, Liming] Shenzhen Univ, Coll Life Sci & Oceanog, Shenzhen Key Lab Marine Biotechnol & Ecol, Shenzhen 518055, Guangdong, Peoples R China.;[He, Zhijun] Wuhan Polytech Univ, Natl R&D Ctr Se Rich Agr Prod Proc, Hubei Engn Res Ctr Deep Proc Green Se Rich Agr Pro, Sch Modern Ind Selenium Sci & Engn, Wuhan 430023, Peoples R China.;[Li, Nan; Liu, Qiong] Shenzhen Bay Lab, Shenzhen 518055, Peoples R China.;[Du, Xiubo] Shenzhen Hong Kong Inst Brain Sci, Shenzhen Fundamental Res Inst, Shenzhen 518055, Peoples R China.
通讯机构：
[Qiong Liu] S;Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, Guangdong 518055, China<&wdkj&>Shenzhen Bay Laboratory, Shenzhen 518055, China
关键词：
Alzheimer's disease (AD);Esculentoside A (EsA);Isobaric tags for relative and absolute;quantitation (iTRAQ);AMP-activated protein kinase (AMPK);Microtubule-associated protein tau (Tau)
摘要：
Background: Neurofibrillary tangles comprising hyperphosphorylated tau are vital factors associated with the pathogenesis of Alzheimer's disease (AD). The elimination or reduction of hyperphosphorylated and abnormally aggregated tau is a valuable measure in AD therapy. Esculentoside A (EsA), isolated from Phytolacca esculenta, exhibits pharmacotherapeutic efficacy in mice with amyloid beta-induced AD. However, whether EsA affects tau pathology and its specific mechanism of action in AD mice remains unclear. Purpose: To investigate the roles and mechanisms of EsA in cognitive decline and tau pathology in a triple transgenic AD (3 x Tg-AD) mouse model. Methods: EsA (5 and 10 mg/kg) was administered via intraperitoneal injection to 8-month-old AD mice for eight consecutive weeks. Y-maze and novel object recognition tasks were used to evaluate the cognitive abilities of mice. Potential signaling pathways and targets in EsA-treated AD mice were assessed using quantitative proteomic analysis. The NFT levels and hippocampal synapse numbers were investigated using Gallyas-Braak silver staining and transmission electron microscopy, respectively. Western blotting and immunofluorescence assays were used to measure the expression of tau-associated proteins. Results: EsA administration attenuated memory and recognition deficits and synaptic damage in AD mice. Isobaric tags for relative and absolute quantitation proteomic analysis of the mouse hippocampus revealed that EsA modulated the expression of some critical proteins, including brain-specific angiogenesis inhibitor 3, galectin-1, and Ras-related protein 24, whose biological roles are relevant to synaptic function and autophagy. Further research revealed that EsA upregulated AKT/GSK3 beta activity, in turn, inhibited tau hyperphosphorylation and promoted autophagy to clear abnormally phosphorylated tau. In hippocampus-derived primary neurons, inhibiting AMP-activated protein kinase (AMPK) activity through dorsomorphin could eliminate the effect of EsA, as revealed by increased tau hyperphosphorylation, downregulated activity AKT/GSK3 beta, and blocked autophagy. Conclusions: To our knowledge, this study is the first to demonstrate that EsA attenuates cognitive decline by targeting the pathways of both tau hyperphosphorylation and autophagic clearance in an AMPK-dependent manner and it shows a high reference value in AD pharmacotherapy research.
作者机构：
[Liu, Wusheng; McAdams, Jeremy; Huang, Debao; Gao, Liwei; Zhao, Fangzhou; Lu, Hongyan] North Carolina State Univ, Dept Hort Sci, Raleigh, NC 27607 USA.;[Gao, Liwei] Ganzhou Normal Univ, Coll Life Sci, Ganzhou 341000, Jiangxi, Peoples R China.;[Zhao, Fangzhou] Nanjing Agr Univ, Natl Ctr Soybean Improvement, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China.;[Lu, Hongyan] Wuhan Polytech Univ, Coll Food Sci & Engn, Wuhan 430048, Hubei, Peoples R China.;[Martin, Jeremy] North Carolina State Univ, Sandhills Res Stn, Jackson Springs, NC 27281 USA.
通讯机构：
[Wusheng Liu] D;Department of Horticultural Science, North Carolina State University , Raleigh, NC 27607, USA<&wdkj&>USDA-ARS, U.S. National Arboretum, Floral and Nursery Plants Research Unit, Beltsville Agricultural Research Center (BARC)-West , Beltsville, MD 20705, USA
摘要：
Camelina sativa is a self-pollinating and facultative outcrossing oilseed crop. Genetic engineering has been used to improve camelina yield potential for altered fatty acid composition, modified protein profiles, improved seed and oil yield, and enhanced drought resistance. The deployment of transgenic camelina in the field posits high risks related to the introgression of transgenes into non-transgenic camelina and wild relatives. Thus, effective bioconfinement strategies need to be developed to prevent pollen-mediated gene flow (PMGF) from transgenic camelina. In the present study, we overexpressed the cleistogamy (i.e. floral petal non-openness)-inducing PpJAZ1 gene from peach in transgenic camelina. Transgenic camelina overexpressing PpJAZ1 showed three levels of cleistogamy, affected pollen germination rates after anthesis but not during anthesis, and caused a minor silicle abortion only on the main branches. We also conducted field trials to examine the effects of the overexpressed PpJAZ1 on PMGF in the field, and found that the overexpressed PpJAZ1 dramatically inhibited PMGF from transgenic camelina to non-transgenic camelina under the field conditions. Thus, the engineered cleistogamy using the overexpressed PpJAZ1 is a highly effective bioconfinement strategy to limit PMGF from transgenic camelina, and could be used for bioconfinement in other dicot species.
摘要：
Combined with the Konjac transcriptome database of our laboratory and internal reference genes commonly used in plants, the eight candidate internal reference genes were screened and detected. They are the 25S ribosomal RNA gene (25S rRNA), 18S ribosomal RNA gene (18S rRNA), actin gene (ACT), glyceraldehyde-3-phosphate dehydrogenase gene (GAPDH), ubiquitin gene (UBQ), beta-tubulin gene (beta-TUB), eukaryotic elongation factor 1-ffgene(eEF-1 alpha), and eukaryotic translation initiation factor 4 beta-1 gene (eIF-4 alpha). The results of GeNorm, Normfinder, and BestKeeper were analyzed comprehensively. The data showed that the expression levels of 25S rRNA, 18S rRNA, and ACT at the reproductive periods, eEF-1 alpha and eIF-4 alpha at the nutritional periods, and eEF-1 alpha, UBQ, and ACT at different leaf developmental periods were stable. These identified and stable internal reference genes will provide the basis for the subsequent molecular biology-related studies of Konjac.
期刊：
Construction and Building Materials,2023年409:133778 ISSN：0950-0618
通讯作者：
Zheng, ZS;Zhang, H
作者机构：
[Zeng, Chen] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Zheng, ZS; Zheng, Zhi-shan] Wuhan Municipal Engn Design & Res Inst Co Ltd, Wuhan 430023, Peoples R China.;[Zhang, Hui; Zhang, H; Huang, Yu-jie] North Univ China, Sch Environm & Safety Engn, Taiyuan 030051, Peoples R China.
通讯机构：
[Zheng, ZS ] W;[Zhang, H ] N;Wuhan Municipal Engn Design & Res Inst Co Ltd, Wuhan 430023, Peoples R China.;North Univ China, Sch Environm & Safety Engn, Taiyuan 030051, Peoples R China.
关键词：
Early-age cracks;Steel corrosion;Mass transfer;Electrochemical corrosion;3D mesoscale cracked RC model
摘要：
Considering that reinforced concrete structures typically work with cracks, this work aims to investigate the chloride-induced non-uniform corrosion of steel by proposing a five-phase cracked reinforced concrete model at mesoscale, including realistic aggregate, matrix, steel, early-age crack, and damage zone. A physically-based 3D mesoscale modeling approach is developed to accommodate all the phases by integrating gravity-driven compaction and vibration as in real casting procedures. This modeling approach is further developed to capture coupled mass transfer and electrochemical corrosion of steel, enabling simulations of non-uniform corrosion along both the circumferential and longitudinal directions of steel. The considerable variation in corrosion morphology due to aggregate distribution demonstrates the necessity of using 3D mesoscale models to predict steel corrosion. Early-age cracks accelerate the diffusion of corrosive agents, intensifying the corrosion of steel. Increasing the crack width, depth, and length all contribute to a higher dissolution thickness of the steel. With the same crack size, longitudinal cracks result in a larger average dissolution thickness of the steel. In addition, the maximum dissolution thickness of the steel is highly correlated with the degree of pitting corrosion, and in most instances, transverse cracks lead to a higher degree of pitting, causing a greater maximum dissolution thickness.
通讯机构：
[Li, B ] W;Wuhan Polytech Univ, Sch Mech Engn, Wuhan 430023, Hubei, Peoples R China.
摘要：
The present study synthesized a deep eutectic solvent (DES) using acrylic acid (AA), acrylamide (AM), and choline chloride (ChCl), and added phytic acid (PA) as a filler. Subsequently, the PA/P(AA-co-AM) composite hydrogel was prepared under ultraviolet irradiation and used a photoinitiator. Characterization of the hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The study aimed to investigate the impact of PA on the mechanical properties, fatigue resistance, and electrical conductivity of the composite hydrogel. The findings demonstrated that as the mass fraction of PA increased, the compressive strength of the composite hydrogel gradually decreased, yet the fatigue resistance of the composite hydrogel increased. Specifically, after 10 cycles of compression, the resilience recovery rate of FP0 dropped from 86.9% to 70.4%, the maximum stress recovery rate of FP1 dropped from 97.9% to 89.4%, the maximum stress recovery rate of FP2 dropped from 94.4% to 86.6%, and the maximum stress recovery rate of FP3 dropped from 97.3% to 93%. Overall, this study offers a straightforward and efficient method for producing composite hydrogels with both fatigue resistance and electrical conductivity.
摘要：
Morphology optimization is an efficient approach to enhance the performance of oxygen evolution reaction (OER) electrocatalysts. Compared with common single plane materials, the terrace‐like TFC‐MOF prepared by an ambient fast method, is hierarchically porous, which enriches the surface area and electrocatalytic active sites, increases the mass/electron transfer efficiency, thus accelerating the four‐electron transfer kinetics process. It promotes the development of MOF‐based electrocatalysts. Abstract It is urgent to design a low‐cost electrocatalyst with high activity to enhance the efficiency of oxygen evolution reaction (OER), which is limited by the slow four‐electron transfer kinetics process. Nevertheless, traditional synthetic methods, including calcination and solvothermal, of the electrocatalysts are high‐cost, low‐yield, and energy‐hogging, which limits their industrial application. Herein, an ambient fast synthetic method is developed to prepare terrace‐like Fe/Co bimetal‐organic framework (TFC‐MOF) electrocatalyst materials in gram scale in 1 h. The method in this paper is designable based on coordination chemistry. Fe and Co ions can coordinate with the carboxyl groups on benzene‐1,3,5‐tricarboxylic acid (H3BTC) to form a 2D‐MOF structure. Structural characterizations, including SEM, TEM, and XRD are conducted to verify that the TFC‐MOF is a terrace‐like layered structure with uniform‐sized mesoporous, which reduces the adsorption steric hindrance and facilitates the mass and electron transfer efficiency of OER. The TFC‐MOF shows low overpotential, 255 mV at a current density of 10 mA cm−2, and a low Tafel slope of 49.9 mV dec−1, in an alkaline solution. This work provides a planar coordination strategy to synthesize 2D‐MOF OER electrocatalyst on a large scale with low cost and low energy consumption, which will promote its practical OER applications.
期刊：
Construction and Building Materials,2023年409:133886 ISSN：0950-0618
通讯作者：
Zheng, ZS;Huang, YJ
作者机构：
[Zeng, Chen] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Wang, Xiang; Zheng, ZS; Zheng, Zhi-shan] Wuhan Municipal Engn Design & Res Inst Co Ltd, Wuhan 430023, Peoples R China.;[Zhang, Hui; Huang, Yu-jie] North Univ China, Sch Environm & Safety Engn, Taiyuan 030051, Peoples R China.
通讯机构：
[Zheng, ZS ] W;[Huang, YJ ] N;Wuhan Municipal Engn Design & Res Inst Co Ltd, Wuhan 430023, Peoples R China.;North Univ China, Sch Environm & Safety Engn, Taiyuan 030051, Peoples R China.
关键词：
Chloride diffusion;3D mesoscale model;Aggregate morphology;Hinder effect and corrosion of steel bar;Bi-directional diffusion
摘要：
This work proposes a novel numerical framework to investigate 3D chloride diffusion behavior in reinforced concrete (RC). An efficient dynamic modeling approach is developed to generate the RC models with real-shaped aggregates at mesoscale. A semi-closed form solution of Fick's second law is established to account for the time -varying chloride diffusion coefficient and surface chloride concentration through a genetic algorithm. Moreover, the effects of aggregate distribution and morphology on chloride diffusion are examined. The validated results demonstrate that the random distribution of aggregates leads to varied chloride concentration, and anisotropic aggregate morphology increases hindrance to chloride diffusion. Steel bar also affects chloride diffusion, causing an increase in chloride concentration on the steel surface. This hinder effect intensifies as the steel diameter increases and the protective layer thickness decreases. Additionally, bi-directional diffusion elevates chloride concentration on the corner steel surface, while smaller steel diameter and thicker protective layer render the corner steel bar more susceptible to bi-directional diffusion. The proposed framework has incorporated various influencing factors with comprehensive parametric analyses and holds potential for engineering design of RC structures considering durability, safety, and sustainability.
期刊：
WATER AIR AND SOIL POLLUTION,2023年234(2):1-15 ISSN：0049-6979
通讯作者：
Haijun Lu
作者机构：
[Luo, Fuwu; Liu, Mengyi; Lu, Haijun; Liu, Xiaofan] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Liu, Mengyi; Lu, Haijun] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China.
通讯机构：
[Haijun Lu] S;School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, China<&wdkj&>State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China
关键词：
Contaminated soil;Industrial waste materials;Curing agent;Hydration products;Microstructure;Mengyi Liu contributed equally to this work and should be considered co-first author.
摘要：
Hexavalent chromium Cr (VI) pollution is prevalent at decommissioned industrial sites and poses a serious risk to the surrounding ecosystem and human health. In this study, we presented a novel heavy metal-contaminated soil curing agent derived from industrial slag (slag and desulfurization gypsum) for the treatment and remediation of Cr (VI)-contaminated soil. This curing agent was used to treat Cr (VI)-contaminated soil at pollution control (78 mg/kg), light contamination (380 mg/kg), and heavy contamination (1000 mg/kg) levels. The migratory properties of Cr (VI) in the cured contaminated soil were evaluated using toxic leaching and soil column tests. The mechanical strength and hydraulic conductivity of the cured contaminated soil were obtained using unconfined compressive, direct shear, and penetration tests. The mineralogical composition, chemical characteristics, and micromorphological features of the cured soils were analyzed using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. The unconfined compressive strength and shear strength parameters (c and phi, respectively) increased significantly as the curing agent dosage was increased, whereas the Cr (VI) leaching concentration and hydraulic conductivity decreased. However, with an increase in Cr (VI) contamination, the cured soil metrics demonstrated the opposite trend. Most of the chromate (CrO42-) ions were encapsulated in hydration gelation products, such as C-S(A)-H and C-A-H. A small portion of Cr (VI) was reduced to Cr (III) or sequestered in the curing agent via charge adsorption. These test results demonstrated the multiple advantageous properties, including environmental safety, high strength, and low permeability, of this novel heavy metal curing agent derived from industrial waste.
摘要：
Metabolic syndrome (MetS) is a global health problem, and EPA/DHA-enriched phospholipids (EPA/DHA-PLs) have been found to have positive effects on MetS improvement. Currently, research on EPA/DHA-PL mainly focuses on special and rare seafood, such as phospholipids derived from krill, sea cucumber, squid, and fish roe. However, it has been recently demonstrated that abundant EPA/DHA-PL can also be found in bulk fish and its by-products. Nonetheless, there is still limited research on the biological activities of EPA/DHA-PL derived from these sources. The aim of this study was to investigate the effect of phospholipid extracts from the heads of salmon and silver carp (S-PLE and SC-PLE) on the high-fat-diet-induced MetS in C57/BL mice. After an 8-week intervention, both SC-PLE and S-PLE had a significant ameliorating effect on MetS. Moreover, SC-PLE was more effective than S-PLE in reducing liver inflammation and fasting glucose. Both of the PL extracts were able to regulate the expression of key genes in lipid synthesis, fatty acid β-oxidation, and insulin signaling pathways. Compared with S-PLE, dietary SC-PLE had a greater influence on liver metabolomics. Pathway enrichment analysis showed that the differential metabolites of SC-PLE were mainly involved in arachidonic acid metabolism and glutathione metabolism. The results indicated that the different metabolic regulation methods of S-PLE and SC-PLE could be related to their variant molecular composition in EPA/DHA-PL.
摘要：
Aerobic granular sludge (AGS) is a promising technology for wastewater treatment due to its high biomass retention, nutrient removal, and resistance to toxic substances. However, the formation and stability of AGS are affected by various factors, such as feeding mode and antibiotic stress. This study investigated how three feeding modes, namely anaerobic plug-flow (APM), anaerobic mixed-flow (AMM), and aerobic feeding mode (AFM), influenced AGS formation and stability under exposure to a mixture of tetracycline, sulfamethoxazole, ofloxacin, and roxithromycin. The results showed that only APM and AMM achieved granulation within 40 d, while AFM failed to form AGS within 90 d due to the low shear force that led to a different composition and structure of extracellular polymeric substances and a high potential barrier calculated by extended Derjaguin-LandauVerwey-Overbeek (XDLVO) theory. The average granules diameters of APM (896.6 mu m) were larger than that of AMM (519.4 mu m), and the results of ultrasonic crushing experiment and XDLVO calculation showed that the structural stability of APM was slightly stronger. However, AMM outperformed APM and AFM in terms of total phosphorus removal, antibiotic removal, and long-term operational stability under low temperature conditions. Illumina MiSeq sequencing and qPCR results revealed that typical biofilm formers (Sediminibacterium and env. OPS_17) contributed to the stability of AGS and increased phosphorus accumulating organisms' genes abundance ensured the high TP removal in AMM. This study offers valuable insights into the effects of diverse feeding modes on aerobic granulation and stability under combined antibiotic stress and suggests that AMM is a promising mode for enhancing AGS performance and resilience in wastewater treatment applications.
摘要：
Anthocyanins are natural flavonoid polyphenolic compounds widely found in fruits and vegetables. They exhibit antioxidant properties and prophylactic effects in the immune and cardiovascular systems, confer protection against cancer, and contribute to the prevention of cardiovascular diseases. Thus, their incorporation into functional foods, pharmaceuticals, supplements, and cosmetic formulations aims at promoting human well-being. This review comprehensively outlined the structural attributes of anthocyanins, expanding upon diverse methodologies employed for their extraction and production. Additionally, the stability, metabolic pathways, and manifold physiological functions of anthocyanins were discussed. However, their constrained fat solubility, susceptibility to instability, and restricted bioavailability collectively curtail their applicability and therapeutic efficacy. Consequently, a multidimensional approach was imperative, necessitating the exploration of innovative pathways to surmount these limitations, thereby amplifying the utilitarian significance of anthocyanins and furnishing pivotal support for their continual advancement and broader application.
通讯机构：
[Hao Wu] S;School of Mechanical Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
In order to solve the problem that digging lotus roots manually was high in labor intensity, low in efficiency and easy to damage lotus roots, and, in view of the defects of the high cost of existing digging lotus roots equipment and the cumbersome operating process needing a certain experience in technology, a jetting spin type digging lotus root machine is designed. Combined with the mechanism of hydraulic digging lotus root, a rotation pipeline is designed, so as to simplify the whole machine structure and increase the digging width. It takes only manpower or vehicles to push forward to perform digging lotus root work, with simple operation and low manufacturing cost. Pro/Engineer 3D design software and CAD 2D drawing software are used to design key working parts such as rotation pipeline, spray-head, nozzle, etc. In addition, key parameters of nozzle structure are designed. Through validation, the intensity of jet flow impact force produced by the diameter 17 mm nozzle to lotus root surface is 97.22 N, and the pressure is 0.20 MPa, which produces no damage to lotus root. By means of a mechanical analysis method, combined with CFD flow field analysis and fluid dynamics analysis, the rotational speed mathematical model of rotation pipeline in water is established through MATLAB software solving and calculating. In addition, the influence of nozzle structural parameters on rotational speed of rotation pipeline is made clear. By using the kinematic analysis method, the rotational speed mathematical model of rotation pipeline associated with the jetting impact frequency of single point and the time of each impact is established, and from which the restricting factors of the working speed of jetting spin type digging lotus root machine is obtained, so as to improve the efficiency of digging lotus roots machine under the premise of ensuring the digging depth and the quality of lotus roots. Through the CFD flow field analysis and dynamic analysis, the mathematical model of loss power of rotating pipeline is established. Through comprehensive analysis, the mathematical model of working speed associated with digging time and speed of rotary pipe and effective range radius of jet impact for digging lotus root machine is obtained, which provides a theoretical basis for adjustment of working parameters of digging lotus root machine.
作者机构：
[Wei, Ying; Ma, Yan] Wuhan Polytech Univ, Key Res Inst Humanities & Social Sci Hubei Prov, Food Safety Res Ctr, Wuhan 430048, Peoples R China.;[Wei, Ying; Ma, Yan] Wuhan Polytech Univ, Sch Management, Wuhan 430023, Peoples R China.;[Zhang, Anlu] Huazhong Agr Univ, Sch Publ Adm, Wuhan 430070, Peoples R China.
通讯机构：
[Yan Ma] F;Food Safety Research Center, Key Research Institute of Humanities and Social Sciences of Hubei Province, Wuhan Polytechnic University, Wuhan 430048, China<&wdkj&>School of Management, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
bibliometrics;rural living environment improvement;social network analysis;cluster analysis;multidimensional scaling analysis;China
摘要：
Improving the rural living environment has become one of the hot issues in the study of rural revitalization in China. Based on 972 high-quality journal articles, in the database of China National Knowledge Infrastructure (CNKI), this paper provides a detailed bibliometric review of research on the improvement of the rural living environment in China, from 1992 to 2022. Based on a descriptive statistical analysis of the publication trends, authors, institutions, source journals, and high-frequency keywords of the sample literature, this paper uses cluster analysis and multidimensional scaling analysis to quantitatively analyze the main research fields, hot topics, and improvement directions. The results show, that the study of the improvement of the rural living environment presents a good trend. The main research include six aspects: rural sewage improvement, rural waste management, rural environment collaborative treatment, rural toilet improvement, new rural construction and management, and rural environmental green development. Among them, the research heat and abundance of research results of the first three, is higher than the latter three. To further deepen the research related to the rural living environment improvement in the future, issues such as rural toilet improvement, new rural construction and governance, and green development of rural environment, need more attention.
