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Engineering design of amphoteric acrylic polymer for rapid and reduced wet-finishing process of eco-leather production towards energy saving and carbon reduction

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POLYMER 2025年 326卷

作者： Xiao, Yuanhang Wang, Yixuan Ren, Keshuai Wang, Chunhua Sang, Jun Ma, Mingjun Ma, Liang Lin, Wei Sichuan Univ Dept Biomass & Leather Engn Key Lab Leather Chem & Engn Minist Educ Chengdu 610065 Peoples R China Sinolight Inspect & Certificat Co Ltd Beijing 100016 Peoples R China Sichuan Univ Natl Engn Res Ctr Clean Technol Leather Ind Chengdu 610065 Peoples R China Qingtongxia Xiangyun Fur Co Ltd Wuzhong 751601 Ningxia Hui Peoples R China

Amphoteric polymers as leather retanning agents are considered to effectively address the charge imbalance between chrome-free tanned leather and common anionic wet finishing materials, and improve the quality of finished leather. However, the currently existed high chemical dosage and tedious wet finishing process associated with chrome-free tanning inevitably lead to high pollution emission and energy consumption. Herein, an amphoteric acrylic polymer (i.e., AARFA) with retanning and fatliquoring functions was prepared by free radical polymerization, which exhibited broad molecular weight (10-100 kDa) and appropriate particle size (similar to 200 nm). Molecular dynamics simulations and experiments showed that AARFA exhibited good dispersion in water and its aggregation behavior can be modulated by adjusting pH. We then applied AARFA in the rapid and reduced wet finishing process (RRWF) for two kinds of typical chrome-free tanned leather. Compared with conventional wet finishing (CWF) process (i.e., 10 % retanning agents and 10 % fatliquor), 12 % AARFA afforded leather dispersed collagen fibers, improved physical and sensory properties, and excellent dyeing performance. The RRWF process can effectively save work time by similar to 31 %, reduce chemical consumption by similar to 35 % and exhibit better wastewater degradability. Our developed RRWF process offer the promise for the chrome-free leather manufacturing towards low energy consumption and less carbon emissions.

关键词： Amphoteric polymer Wet finishing process Chrome-free tanned leather

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Molecular epidemiology of Escherichia coli in bloodstream infections from a general hospital in ningxia, China, 2022-2023

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BMC INFECTIOUS DISEASES 2025年第1期25卷 1-10页

作者： Hu, Xinxin Tao, Jia Yan, Lixin Hong, Wei Wang, Wen Wang, Liru Li, Gang Jia, Wei Ningxia Med Univ Coll Clin Med Yinchuan 750004 Ningxia Peoples R China Ningxia Med Univ Ctr Med Lab Gen Hosp Yinchuan Peoples R China Ningxia Med Univ Ningxia Key Lab Clin & Pathogen Microbiol Gen Hosp Yinchuan Peoples R China

Objective To analyse the antibiotic resistance, resistance genes and clonal relationship of Escherichia coli in bloodstream infections in ningxia from 2022 to 2023. Methods We retrospectively analyzed the antibiotic susceptibilities of 257 isolates. PCR was used to detect blaTEM, blaSHV, blaCTX-M, qnrS, qnrA, qnrB, oqxA, qepA, gyrA, gyrB, parC, and parE, and the clonal relationship through multilocus sequence typing (MLST). Results One hundred and twenty-nine of 257 patients were male (50.2%). The 257 E. coli isolates were mainly obtained from the Emergency, Hepatobiliary Surgery, and Haematology Departments, accounting for 56.6%, 7.3%, and 6.2%, respectively. There is no significant difference in sex and genes between the two groups over and under 60 years old (P > 0.05), but there is a significant difference in ST between them(P<0.05). The antimicrobial susceptibility testing showed that the 257 isolates had the highest rates of resistance to ampicillin (82.8%), followed by cefazolin (71.6%), and all isolates were susceptible to tigecycline. Based on the antibiotic susceptibility results for ceftriaxone, we tested 126 isolates of E. coli for extended-spectrum beta-lactamase (ESBL) resistance genes. As a result, blaCTX-M was detected in 76 isolates (60.32%), blaSHV in 26 isolates (20.63%), and blaTEM in 38 isolates (30.16%). Based on the ciprofloxacin and levofloxacin antibiotic susceptibility results, we tested for quinolone resistance genes in 148 isolates, revealing 66 isolates of aac(6')-Ib-cr (44.60%), 3 isolates of oqxA (2.02%), 32 isolates of qnrS (21.62%), and 2 isolates of qepA (1.35%). We did not detect qnrA or qnrB. The detection rates of gyrA, gyrB, parC, and parE were 98%, 42.6%, 91.2%, and 87.8%, respectively and the main amino acid mutations were Ser83 to Leu, Asp87 to Asn(75.2%), Leu417 to Ser, Ser418 to Leu (6.3%), Ser80 to Ile (65.2%), and Ser458 to Ala (21.5%), respectively. MLST revealed that the most common sequence types (STs) were ST69 (12.5%

关键词： Escherichia coli Bloodstream infection Resistance genes Antimicrobial susceptibility Sequence type.

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Efficacy analysis of pancreatic duct stenting in treating severe acute pancreatitis: a retrospective study

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EUROPEAN JOURNAL OF MEDICAL research 2025年第1期30卷 1-9页

作者： Chen, Liangping Wang, Ning Yao, Weijie Zhao, Chengsi Tao, Jiahang Ma, Gubai Ma, Chengwang Wang, Zuozheng Ningxia Med Univ Yinchuan 710004 Peoples R China Ningxia Med Univ Dept Hepatobiliary Surg Gen Hosp Yinchuan 710004 Peoples R China

Background This study aims to evaluate the clinical efficacy of pancreatic duct stenting in the treatment of SAP, providing reference for clinical diagnosis and treatment. Method sA retrospective analysis was conducted on clinical data from patients with SAP admitted to the General Hospital of ningxia Medical University from June 1, 2019 to December 31, 2022. A total of 51 patients were included (33 males, 18 females). Patients were divided into two groups based on treatment: the control group (n = 28) receiving conventional treatment and the stent group (n = 23) undergoing pancreatic duct stenting in addition to conventional treatment. Data collected and analyzed include demographic information, rates of late local complications, late surgical interventions, new-onset OF, infected pancreatic necrosis and new-onset systemic complications. Specific outcomes measured were incidences of new-onset respiratory, renal and circulatory failure, single and multiple OF, sepsis, ACS, abdominal hypertension, and pancreatogenic encephalopathy, as well as use of >= 3 types of antibiotics, time of antibiotic use, time of analgesic administration, oral refeeding, length of hospital stay, ICU care, and length of ICU stay. These indicators were used to assess the therapeutic efficacy of pancreatic duct stenting. Results All 23 patients in the stent group successfully underwent stenting. The incidence of new-onset OF and new-onset systemic complications was significantly lower in the stent group compared to the control group (chi 2 = 4.96, 6.65, P < 0.05). However, no significant differences were observed between the groups regarding late local complications, infected pancreatic necrosis, and late surgical intervention (chi 2 = 0.22, 0.002, 0.024, P > 0.05). Notably, two patients in the control group required additional procedures due to inadequate drainage, with one undergoing endoscopic debridement and the other, laparotomy. Mortality rates were 3 (10.7%) in the control group and 4

关键词： Pancreatitis Acute Severe Pancreatic duct stenting Endoscopic retrograde cholangiopancreatography

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Rapid visual detection of bovine viral diarrhea virus (BVDV) using recombinase polymerase amplification with SYBR green I

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BMC VETERINARY research 2025年第1期21卷 1-9页

作者： Jiang, Lingling Wang, Pu Zhang, Gang Niu, Xiaoxia Liu, Qiang Liang, Ruijin Zhang, Sinong Li, Yong Ningxia Univ Sch Life Sci Yinchuan Peoples R China China Med Univ Shenyang Peoples R China

Background Bovine diarrhea virus (BVDV) is considered to be the most common pathogen causing severe diarrhea in cattle worldwide and can cause Bovine viral diarrhea (BVD). Clinical manifestations of fever, diarrhea, ulcers, and abortions, resulting in significant economic losses to the cattle industry. The development of an efficient, rapid and sensitive assay suitable for field conditions is of great significance for its early detection. Recombinase polymerase amplification (RPA) is a novel nucleic acid amplification method that has been widely used in the diagnosis of infectious diseases. Results We developed a rapid assay (RPAS) combining RPA with SYBR Green I for the detection of BVDV. The BVDV RPAS assay was performed at 37 degrees C in 25 min. The minimum detection limit of the RPAS assay is 1 x 109 copies/mu L in sunlight and 1 x 105 copies/mu L in ultraviolet light, and there is no cross-reactivity with other viruses that cause gastrointestinal and respiratory infections in cattle. The coincidence rate of BVDV RPAS in clinical samples was higher than that of PCR. Conclusions The BVDV RPAS assay established in this study has high sensitivity and specificity, and is expected to be a powerful tool for the prevention and control of BVD.

关键词： Bovine viral diarrhea virus Recombinase polymerase amplification SYBR green I Visualization detection

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Incorporating Cattle Manure Improves Hydraulic Properties and Enhances Infiltration Rates of Low-Infiltrability Saline-Sodic Soils

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LAND DEGRADATION & development 2025年第3期36卷 945-953页

作者： Li, Xia Guo, Zhengxiong Ma, Yulei Leite, Pedro A. M. Li, Zhigang Wu, Gao-Lin Northwest A&F Univ Coll Sci Yangling Shaanxi Peoples R China Northwest A&F Univ Inst Soil & Water Conservat State Key Lab Soil Eros & Dryland Farming Loess Pl Yangling Peoples R China Texas A&M Univ Dept Ecol & Conservat Biol College Stn TX USA Ningxia Univ Coll Forestry & Prataculture Yinchuan Ningxia Peoples R China Chinese Acad Sci Inst Soil & Water Conservat Yangling Shaanxi Peoples R China Minist Water Resource Yangling Shaanxi Peoples R China

Drylands present a significant challenge to global agricultural production, especially in dryland saline-sodic soils, which are marked by poor structure and low infiltrability. Enhancing the infiltration capacity of these soils is crucial for enhancing soil health and optimizing land-use efficiency. However, few studies have been conducted to improve soil physical structure and enhance water infiltration and storage capacity in saline-sodic soils through agricultural waste. This study aims to evaluate the effectiveness of cattle manure amendments in improving water infiltration and related soil properties in dryland saline-sodic soils. Our results show that mixing cattle manure into the topsoil soil significantly enhances infiltration rates, with the initial and the stable infiltration rates increasing on average by 64.5% and 52.1%, respectively, over the three-year study period. These improvements are associated with a reduction in bulk density and soil compressive strength by 6.9% and 101.9%, respectively, as well as increases in total porosity, non-capillary porosity, and soil organic matter by 6.6%, 24.7%, and 8.7%, respectively. In contrast, cattle manure mulching in the topsoil has no significant impact on infiltration and soil properties. Structural equation models reveal that soil water content, non-capillary porosity, and total porosity are the primary properties influencing the stable infiltration rates, whereas total porosity, soil compressive strength, and non-capillary porosity are key factors affecting the initial infiltration rate. Our findings demonstrated that incorporating cattle manure into the soil can effectively enhance the soil porosity properties, infiltrability, and organic matter content of saline-sodic soils. These findings highlight the potential of cattle manure to improve soil physical properties and enhance water infiltration in low-infiltrability saline-sodic soils, offering a theoretical basis for addressing this issue in semiarid re

关键词： cattle manure dryland saline-sodic soil permeability soil hydraulics properties soil water infiltration

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Comparative study on long-term survival and postoperative complications between minimally invasive surgery and traditional thoracotomy for lung cancer

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ASIAN JOURNAL OF SURGERY 2025年第3期48卷 2062-2063页

作者： Zhang, Sheng Yu, Liang Lv, Zhiping He, Wei Ningxia Med Univ Gen Hosp Dept Gen Thorac Surg Yinchuan Peoples R China

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Enhanced pH-universal industrial-level CO2 reduction in N-doped carbon with nickel particles active sites via accelerated proton transport kinetics

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CARBON 2025年 237卷

作者： Mu, Haiqiang Shan, Pengyue Zhang, Ting Wu, Jinglong Li, Feng Li, Haibo Li, Jing Ningxia Univ Coll Chem & Chem Engn Yinchuan 750021 Ningxia Peoples R China Southeast Univ Sch Energy & Environm Key Lab Energy Thermal Convers & Control Minist Educ Nanjing 210096 Peoples R China Liupanshan Lab Yinchuan 750021 Ningxia Peoples R China Ningxia Univ Anal & Testing Ctr Yinchuan 750021 Ningxia Peoples R China

Electrochemical CO2 reduction reaction (ECO2RR) under high current conditions in alkaline systems is commonly hindered by salting-out effects and low carbon utilization. Acidic electrolytes effectively mitigate these issues but are limited by the hydrogen evolution reaction (HER) and the lack of high-performance catalysts. Herein, we design a nitrogen-doped carbon-supported Ni nanoparticles (Ni-NPs/N-C) catalyst for achieving industrial-level current density (175.9-325.2 mA cm- 2) and converting CO2 to CO (FECO approximate to 100 %) in pHuniversal electrolytes (pH = 1-14), it also maintaining long-term stability (21 h) under strong acidic condition. What's more, the efficiency of CO2 utilization reaches 56.3 % under acidic conditions, which is 1.5 and 1.8 times higher than under neutral and alkaline conditions, respectively. Electrochemical kinetics test, in-situ infrared coupled with density functional theory calculations (DFT) demonstrate that the uniformly dispersed NiNPs(111) sites can regulate the local pH on the catalyst interface, which favors to the protonation of CO2 to significantly enhance *COOH intermediate formation (Delta G = 0.16 eV) and *CO desorption during the ECO2RR process. This work provides novel insights for the subsequent development of high-performance acidic electrolysis systems.

关键词： CO 2 electroreduction N -doped carbon pH-universal Industrial-level Ni-NPs(111)

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development and validation of a susceptor-assisted radio frequency heating strategy for improving uniformity in powdered foods

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INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES 2025年 100卷

作者： Zhang, Yuqing Wang, Xiangyi Ma, Jiaqi Qin, Pengyu Kang, Jiayi Wang, Shaojin Huang, Zhi Northwest A&F Univ Coll Mech & Elect Engn Yangling 712100 Shaanxi Peoples R China Washington State Univ Dept Biol Syst Engn 213 LJ Smith Hall Pullman WA 99164 USA

The objective of this study was to model and analyze susceptor-assisted radio frequency (RF) heating for powdered foods, with a focus on improving energy efficiency and heating rate. A 6 kW, 27.12 MHz RF system, combined with a finite element model developed using COMSOL software, was employed to simulate and validate the RF heating process of corn flour in metal susceptors. Experimental results demonstrated that strategically positioning RF wave transmission holes along the long sides of the metal susceptor, particularly near cold spots, resulted in optimal heating uniformity, enhanced heating rate, and improved energy efficiency. Notably, the energy transmission area was identified as the most significant factor affecting overall energy efficiency. The validated simulation showed that the optimal pore diameter increased with the sample's lengthwidth sequence and height. However, when the pore size exceeded a certain threshold, the electric field concentration decreased. Optimized susceptor designs improved energy efficiency by approximately 10 %, with specific configurations achieving 15 % and 18 % enhancements for susceptor sizes of 300 mm x 180 mm and 400 mm x 240 mm, respectively. Additionally, the study established a quantitative relationship between the sample's length-width sequence, height, and optimal pore diameter, with regression errors maintained below 5 %. These findings offer valuable insights into the optimization of RF heating in metallized food packaging, providing a foundation for more energy-efficient designs in industrial applications.

关键词： Energy efficiency Finite element model Heating rate Heating uniformity RF heating

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Identifying early predictive and diagnostic biomarkers and exploring metabolic pathways for sepsis after trauma based on an untargeted metabolomics approach

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SCIENTIFIC REPORTS 2025年第1期15卷 1-19页

作者： Gou, Yi Lv, Bo-hui Zhang, Jun-Fei Li, Sheng-Ming Hei, Xiao-Ping Liu, Jing-Jing Li, Lei Yang, Jian-Zhong Feng, Ke Ningxia Med Univ Gen Hosp Dept Emergency Med Yinchuan 750003 Ningxia Peoples R China Xinjiang Med Univ Affiliated Hosp 1 Urumqi 830011 Peoples R China Guizhou Med Univ Sch Nursing Guiyang 550025 Peoples R China

Systemic inflammatory response syndrome (SIRS) and organ dysfunction make it challenging to predict which major trauma patients are at risk of developing sepsis. Additionally, the unclear pathogenesis of sepsis after trauma contributes to its high morbidity and mortality. Identifying early predictive and diagnostic biomarkers, as well as exploring related metabolic pathways, is crucial for improving early prevention, diagnosis, and treatment. This study prospectively analyzed plasma samples from patients with severe trauma collected between March 2022 and November 2023. Trauma patients were divided into two groups based on whether they developed sepsis within two weeks: the TDDS group (trauma patients who did not develop sepsis) and the TDS group (trauma patients who did develop sepsis). Plasma samples from the TDS group were collected at the time of sepsis diagnosis (Sepsis group). Metabolite concentrations were measured using ultrahigh-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) through untargeted metabolomics. From the differential metabolites between the TDS and TDDS groups, we identified five significant metabolites (all area under the curve (AUC) >= 0.94) as early predictive biomarkers for sepsis after trauma: (1) docosatrienoic acid, (2) 7-alpha-carboxy-17-alpha-carboxyethylandrostan lactone phenyl ester, (3) sphingomyelin (SM) 8:1;2O/26:1, (4) N1-[1-(3-isopropenylphenyl)-1-methylethyl]-3-oxobutanamide, and (5) SM 34:2;2O. Furthermore, five significant metabolites (all AUC >= 0.85) were identified as early diagnostic biomarkers from the comparison between the TDS and TDDS groups: (1) lysophosphatidylcholine (LPC) O-22:1, (2) LPC O-22:0, (3) uric acid, (4) LPC O-24:2, and (5) LPC 22:0-SN1. 26 metabolites shared between two comparisons (TDS vs. TDDS and sepsis vs. TDS) were identified. Of which, 19 metabolites belong to lipid metabolism. The top three metabolic pathways related to sepsis after trauma under the impact of severe traum

关键词： Sepsis Trauma Metabolomics Biomarkers Pathways

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Experimental study on the charging process of dust particles

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POWDER TECHNOLOGY 2025年 453卷

作者： Liu, Tian-sheng Bo, Tian-Li Ningxia Univ Sch Phys Yinchuan 750021 Peoples R China Ningxia Univ Ningxia Key Lab Intelligent Sensing Desert Informa Yinchuan 750021 Peoples R China

In this paper, a charging property measurement system for dust particles is developed that can reflect the particle collision process during real dust events. The experimental results show that with the increase of the incident velocity ( v imp ) of the impact particles and the particle size ratio (lambda), the charge-to-mass ratio (q) of the impacted particle decreases. Upon comparing our results with existing experimental data, we observed that when the impacted particle is constrained, there is a possibility that the particle's q may be underestimated, and furthermore, there exists a qualitative difference in how q varies with the impact velocity (vimp). Based on the capacitor model, this paper presents a charge model of dust particles considering the v imp and lambda. The representation equation of the parameter K Q in the model is determined based on the experimental data using the least squares method, indicating that its representation reflects the influence of both v imp and lambda. Moreover, K Q dominates the influence of v imp on the q . The prediction results of the model are in good agreement with the experimental results.

关键词： Dust particles Incident velocity Charge-to-mass ratio Charge model Particle size ratio

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