期刊文献+
共找到13,082篇文章
< 1 2 250 >
每页显示 20 50 100
Application of 3D printing technology in the treatment of bacterial inflammation:oral formulations,internal implants,and external dressings
1
作者 Zanyan Gao Shiyu Gao +5 位作者 Maomei Xie Chen Chen Yongyuan Li Guangcheng Jia Rui Liu Haixia Wang 《Journal of Chinese Pharmaceutical Sciences》 2026年第1期16-37,共22页
As bacterial infections have emerged as the second leading cause of death worldwide,the urgent demand for novel and effective antibacterial therapies continues to escalate.In this context,three-dimensional(3D)printing... As bacterial infections have emerged as the second leading cause of death worldwide,the urgent demand for novel and effective antibacterial therapies continues to escalate.In this context,three-dimensional(3D)printing technology offers transformative potential for the design and fabrication of oral formulations,internal implants,and external dressings in the management of bacterial inflammation.Conventional oral antibacterial agents often suffer from limitations in drug release kinetics and gastrointestinal stability.Leveraging 3D printing enables precise control over drug release profiles,thereby enhancing both bioavailability and therapeutic efficacy.Moreover,the development of internal implants requires high levels of individual specificity and structural precision.Through patient-specific customization and the incorporation of appropriate antibacterial materials,3D printing allows the fabrication of implants tailored to individual clinical needs,ultimately increasing surgical success rates and minimizing postoperative infection risks.Additionally,3D-printed external dressings exhibit excellent antibacterial activity,accelerate wound healing,and facilitate patient recovery.This review summarizes the fabrication methods,key advantages,and therapeutic outcomes of 3D printing in oral delivery systems,implantable devices,and wound dressings.It further highlights recent advances and emerging trends,offering insights and strategic guidance for the rational design and application of antibacterial therapeutics. 展开更多
关键词 3D printing Antimicrobial drug delivery Oral formulations Internal implants External dressings
原文传递
General multi-steps variable-coefficient formulation for computing quasi-periodic solutions with multiple base frequencies
2
作者 Junqing Wu Ling Hong +1 位作者 Mingwu Li Jun Jiang 《Acta Mechanica Sinica》 2026年第1期260-275,共16页
Quasi-periodic solutions with multiple base frequencies exhibit the feature of 2π-periodicity with respect to each of the hyper-time variables.However,it remains a challenge work,due to the lack of effective solution... Quasi-periodic solutions with multiple base frequencies exhibit the feature of 2π-periodicity with respect to each of the hyper-time variables.However,it remains a challenge work,due to the lack of effective solution methods,to solve and track the quasi-periodic solutions with multiple base frequencies until now.In this work,a multi-steps variable-coefficient formulation is proposed,which provides a unified framework to enable either harmonic balance method or collocation method or finite difference method to solve quasi-periodic solutions with multiple base frequencies.For this purpose,a method of alternating U and S domain is also developed to efficiently evaluate the nonlinear force terms.Furthermore,a new robust phase condition is presented for all of the three methods to make them track the quasi-periodic solutions with prior unknown multiple base frequencies,while the stability of the quasi-periodic solutions is assessed by mean of Lyapunov exponents.The feasibility of the constructed methods under the above framework is verified by application to three nonlinear systems. 展开更多
关键词 Multi-steps variable-coefficient formulation Phase condition Harmonic balance method Finite difference method Collocation method
原文传递
High-efficiency γ-aminobutyric acid nano-formulation for turnip mosaic virus:excellent adhesion performance and amplified plant defensive responses 被引量:1
3
作者 Chao Zhang Jingyi Chen +5 位作者 Yubo Wen Yichao Liu Xuan Li Shuo Yan Jianjun Zhao Jun Li 《Horticultural Plant Journal》 2025年第6期2285-2288,共4页
Chinese cabbage(Brassica rapa subsp.pekinensis)is a widely cultivated vegetable crop in Asia with significant economic importance(Li et al.,2024;Yu et al.,2024).As a potyvirus with the broad host range,turnip mosaic v... Chinese cabbage(Brassica rapa subsp.pekinensis)is a widely cultivated vegetable crop in Asia with significant economic importance(Li et al.,2024;Yu et al.,2024).As a potyvirus with the broad host range,turnip mosaic virus(TuMV)is a major pathogen affecting Chinese cabbages,leading to severe yield losses(Li et al.,2019).Traditional control measures have shown limited efficacy,and the long-term use of chemical pesticides has led to significant issues such as environmental pollution and pathogen resistance(Samara et al.,2021;Lu et al.,2022).Biologicallyderived pesticides have garnered considerable attention owing to their eco-friendly attributes(Ayilara et al.,2023).γ-Aminobutyric acid(GABA),initially discovered in potato tubers,has been proven to regulate immune responses and enhance resistance to fungal and bacterial pathogens by modulating reactive oxygen species and stress-related hormone signals(Tarkowski et al.,2020;Wang et al.,2025).But biologically-derived agents typically face challenges such as large particle size and instability,which limit their practical application and bioavailability(Daraban et al.,2023). 展开更多
关键词 turnip mosaic virus chemical pesticides mosaic virus tumv control measures aminobutyric acid environmental pollution high efficiency nano formulation
在线阅读 下载PDF
Accurate real-time truck simulation via semirecursive formulation and Adams-Bashforth-Moulton algorithm 被引量:4
4
作者 Yongjun Pan Yansong He Aki Mikkola 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2019年第3期641-652,共12页
In this paper, a tailored four-step Adams-Bashforth-Moulton (ABM) algorithm is applied to a semirecursive formulation to perform a real-time simulation of a semitrailer truck. In the ABM algorithm, each integration st... In this paper, a tailored four-step Adams-Bashforth-Moulton (ABM) algorithm is applied to a semirecursive formulation to perform a real-time simulation of a semitrailer truck. In the ABM algorithm, each integration step involves two function evaluations, namely predictor and corrector. This is fundamentally different when compared to the classic fourth-order Runge-Kutta (RK) integrator approach that contains four function evaluations. A semitrailer truck under investigation is modeled in term of a semirecursive method and simulated by using the presented ABM algorithm. The results show that the four-step ABM method can reduce CPU time almost 50% for solving the truck dynamics with very similar accuracy, in comparison to the fourth-order RK method. The presented ABM algorithm could be used in the semirecursive formulation to carry out accurate real-time simulation of medium-large vehicle systems. 展开更多
关键词 Numerical ALGORITHM Semirecursive formulation Vehicle dynamics COMPUTATIONAL efficiency
在线阅读 下载PDF
Synthesis and microencapsulation of oleic acid sterol ester liquid crystals for its application in sunscreen formulations
5
作者 Xuze Liu Chang Xu +1 位作者 Liangliang Lin Hujun Xu 《日用化学工业(中英文)》 北大核心 2025年第11期1408-1418,共11页
This study reports the synthesis of oleic acid sterol ester with liquid crystalline properties and its enhanced stability and UV-blocking performance through microencapsulation.Oleic acid sterol ester was synthesized ... This study reports the synthesis of oleic acid sterol ester with liquid crystalline properties and its enhanced stability and UV-blocking performance through microencapsulation.Oleic acid sterol ester was synthesized via the esterification of phytosterol and oleic acid,whose structure was characterized using Fourier-transform infrared spectroscopy(FTIR)and mass spectrometry(MS).Its liquid crystalline behavior was confirmed via the polarized optical microscopy(POM),thermogravimetric analysis(TGA),differential scanning calorimetry(DSC),wide-angle X-ray scattering(WAXS),and small-angle X-ray scattering(SAXS).UV absorption tests were conducted to assess the UV-blocking performance of the oleic acid sterol ester liquid crystals.To improve the stability of its liquid crystalline structure,the oleic acid sterol ester was encapsulated into microcapsules through the emulsion polymerization.SPF measurements were performed on the sunscreen formulations containing liquid crystal microcapsules.The oleic acid sterol ester displayed cholesteric liquid crystalline behavior and strong UVA absorption,which indicates its suitability as a natural UV absorber.Microencapsulation further enhanced its stability and UV-blocking properties.SPF testing showed that the formulations with microcapsules achieved an SPF value of 7.01,which surpasses the nano titanium dioxide(SPF=6.23)and significantly outperform the unencapsulated liquid crystal formulations(SPF=2.65).This study highlights the potential of microencapsulated oleic acid sterol ester as a novel UV absorber in the sunscreen formulations,offers the enhanced stability and effective UV protection,and showcases its application potential in the innovative cosmetic products. 展开更多
关键词 PHYTOSTEROL liquid crystals MICROENCAPSULATION UV absorption sunscreen formulations SPF testing
在线阅读 下载PDF
三苯基磷修饰花菁H-聚集体靶向增强光热治疗
6
作者 魏斯文 侯浩然 宋锋玲 《华东理工大学学报(自然科学版)》 北大核心 2026年第1期1-15,共15页
光热治疗(PTT)通过光热剂(PTAs)吸收近红外光,将光激发产生的非辐射能量耗散到病灶部位,实现局部组织的热消融,为治疗肿瘤及细菌感染提供了新途径,但开发兼具高效光热转换与精准靶向功能的有机PTAs面临挑战。本文聚焦七甲川花菁(Cy7)染... 光热治疗(PTT)通过光热剂(PTAs)吸收近红外光,将光激发产生的非辐射能量耗散到病灶部位,实现局部组织的热消融,为治疗肿瘤及细菌感染提供了新途径,但开发兼具高效光热转换与精准靶向功能的有机PTAs面临挑战。本文聚焦七甲川花菁(Cy7)染料分子工程优化,提出聚集态调控与功能基团协同强化策略,在中性Cy7骨架上引入三苯基磷阳离子(TPP^(+)),构建新型阳离子衍生物Cy7T-TPP。该衍生物具有三重优势:TPP^(+)赋予细菌膜锚定与线粒体靶向能力;诱导H-聚集体增强分子间紧密堆叠,光热转换效率达到51.65%;TPP^(+)屏蔽活性氧攻击,提升稳定性。实验证实Cy7T-TPP的抗肿瘤及抗菌效能优异,为高稳定、靶向性有机光热材料的开发提供了分子工程新范式。 展开更多
关键词 光热治疗 线粒体靶向 细菌靶向 花菁染料 h-聚集体
在线阅读 下载PDF
Sensory Characterizations and Optimization of Cashew Apple Jam Formulations Using Baobab Powder as a Source of Pectin
7
作者 Marie Bianoun Louise Dégni Doudjo Soro +3 位作者 Essan Bla Zita N’Goran-Aw Djedjro Clément Akmel Nogbou Emmanuel Assidjo Kouassi Benjamin Yao 《Food and Nutrition Sciences》 2025年第1期120-136,共17页
Cashew processing in Côte d’Ivoire focuses only on the cashew nut, to the detriment of the apple. Only a very small proportion of the apple is processed into juice. The aim of this work is to enhance the value o... Cashew processing in Côte d’Ivoire focuses only on the cashew nut, to the detriment of the apple. Only a very small proportion of the apple is processed into juice. The aim of this work is to enhance the value of cashew apples by transforming them into jam. Specifically, the aim was first to characterize the sensory properties of cashew apple jam formulations using baobab powder as a source of pectin and then to optimise the formulations. A Box-Behken design with pH, Sugar, and Baobab as factors was used to model and characterize the jam sensory descriptors, and a multivariate analysis with SensomineR was used to characterize the jam formulations. The desirability function was used to optimise the formulations. The results show globally significant regressions at the 0.05 threshold for the sensory descriptors Gelling, Brilliance, Smell, Sweetness, and (-)Astringency, with the exception of (-)Salinity. The R2 coefficients are greater than 80%. The factors studied could have effects on the sensory descriptors of cashew jam formulations. The Baobab had the main effect on the gelling, smell, and astringency of the jams. Brilliance depended on the added sugar. A product effect (p < 0.001) was observed for the descriptors Smell, Gelling, Brilliance, and Sweetness, as these allowed the panelists to find differences between the formulations. Optimum jam formulation can be achieved with 51.56% sugar and 2.12% Baobab at a pH of 3.15. Cashew apple jam using Baobab offers opportunities to add value to apples that have long been abandoned in the field. It would be important to find conditions for prolonged storage of this jam. 展开更多
关键词 Cashew Apple Sensory Characterization Jam formulation Area Design Product Effect Overall Desirability
在线阅读 下载PDF
Identification of bioactive compounds and molecular targets of Fuke Huahuang formulation to treat vaginitis
8
作者 Huiyu Liu Jie Mo +3 位作者 Cheng Liang Qingting Chen Bin Yang Jiaqi Liu 《Animal Models and Experimental Medicine》 2025年第6期1095-1104,共10页
Background:Fuke Huahuang formulation(FHF)is widely used in the treatment of vaginitis,with clinical evidence indicating its promising anti-inflammatory properties.Methods:We explored the bioactive components and poten... Background:Fuke Huahuang formulation(FHF)is widely used in the treatment of vaginitis,with clinical evidence indicating its promising anti-inflammatory properties.Methods:We explored the bioactive components and potential mechanisms of FHF for treating vaginitis,and reveal its pharmacological activities against vaginitis.Results:A total of 12 anti-inflammatory components in FHF and 584 pharmacological targets were identified.Furthermore,1427 vaginitis-associated targets were identified,and 184 intersection targets between FHF and vaginitis were constructed for network analysis.Gene Ontology and pathway analysis revealed that the therapeutical targets of FHF against vaginitis are involved in modulating inflammatory stress,enhancing immunoregulation,reconstructing the microenvironment,and suppressing cell damage.Molecular docking analysis further suggested the possible direct binding of the bioactive compounds of FHF(fumarine)to the core targets,including AKT Serine/Threonine Kinase 1(AKT1),Signal Transducer and Activator of Transcription 3(STAT3),and nuclear factor-kappaB(NF-κB).Experimental validation found that FHF-treated vaginitis rats exhibited reduced intracellular AKT1,STAT3,and NF-κB protein expressions.Conclusion:Overall,we identified the bioactive compounds and pharmacological mechanisms of FHF against vaginitis,thus offering a theoretical fundament for exploring FHF for treating vaginitis in the future. 展开更多
关键词 biological validation biotargets Fuke Huahuang formulation MECHANISM VAGINITIS
暂未订购
铜催化3-硝基色烯与烯胺酮环化反应合成2H-色烯并吡咯衍生物
9
作者 梁婉婷 陈思怡 +1 位作者 徐恩琪 陈雪冰 《有机化学》 北大核心 2026年第2期496-506,共11页
色烯并吡咯类化合物具有广泛的生理和药理活性.发展了一种CuI催化下,以1,5-二氮杂双环[4.3.0]壬-5-烯(DBN)为促进剂,室温下3-硝基色烯和环状β-烯胺酮通过[3+2]环合反应合成分子多样性2H-色烯并吡咯化合物的新方法.该反应具有良好官能... 色烯并吡咯类化合物具有广泛的生理和药理活性.发展了一种CuI催化下,以1,5-二氮杂双环[4.3.0]壬-5-烯(DBN)为促进剂,室温下3-硝基色烯和环状β-烯胺酮通过[3+2]环合反应合成分子多样性2H-色烯并吡咯化合物的新方法.该反应具有良好官能团相容性、广泛底物普适性和温和反应条件等优点. 展开更多
关键词 铜催化 [3+2]环合 2h-色烯并吡咯 3-硝基色烯 烯胺酮
原文传递
Study and Formulation of a Dietary Cold Sauce Based on Pumpkin Seed Oil and Quail Eggs
10
作者 Koumba Hawa Toundoufedouno Kéloua Kourouma Adama Moussa Sakho 《Journal of Environmental Science and Engineering(B)》 2025年第1期36-45,共10页
This work focuses on the formulation of a dietary cold sauce,mayonnaise,which combines the therapeutic properties of two basic ingredients:PSO(Pumpkin Seed Oil)and quail egg,both of which are renowned for their high f... This work focuses on the formulation of a dietary cold sauce,mayonnaise,which combines the therapeutic properties of two basic ingredients:PSO(Pumpkin Seed Oil)and quail egg,both of which are renowned for their high functional properties.PSO is essentially made up of unsaturated fatty acids(50%to 65%)including linoleic acid,from the omega 6 family,oleic acid(20%to 50%),a monounsaturated fatty acid(omega 9),cucurbitin,phytosterols,tri-terpenes and vitamin E(3.5 mg%).The nutritional,fatty acid,vitamin and mineral compositions of the mayonnaise compared with the ingredients,the physico-chemical characteristics of the quail egg,the PSO and the tasting of the mayonnaise were determined and gave results in terms of variable contents which are recorded in Tables 2-8.The results obtained were satisfactory.Mayonnaise,a semi-solid emulsion of oil in water with viscoelastic properties due to the network formed by lipoproteins adsorbed around neighbouring drops of oil,was prepared using the ratio of quail egg and PSO 1/4.This study may offer an alternative way of making dietary sauces. 展开更多
关键词 Nutritional study food formulation dietary sauce PSO quail eggs
在线阅读 下载PDF
Phytoconstituents,mechanisms,and delivery systems in polyherbal formulations for anti-aging skincare:A comprehensive review
11
作者 Mohammad Shavez Anurag Verma Gulshan Rathore 《Journal of Dermatologic Science and Cosmetic Technology》 2025年第4期19-29,共11页
Skin aging is a complicated process affected by extrinsic factors such as ultraviolet(UV)radiation and environmental pollutants,in addition to intrinsic factors such as oxidative stress and cellular senescence.These f... Skin aging is a complicated process affected by extrinsic factors such as ultraviolet(UV)radiation and environmental pollutants,in addition to intrinsic factors such as oxidative stress and cellular senescence.These factors initiate inflammation,collagen breakdown,and visible signs of aging.Polyherbal formulation with multiple plant extracts with synergistic bioactive compounds offers a sustainable and scientifically proven way of modulating the interrelated pathways that contribute to skin aging.This comprehensive review features 7 key anti-aging plants,including Curcuma longa,Curcuma aromatica,Glycyrrhiza glabra,Calendula officinalis,Boehavia diffusa,Withania somnifera,and Matricaria chamomilla,and discusses their active phytoconstituents such as curcumin,glabridin,withanolides,and apigenin.These agents improve the hydration of skin,increase collagen synthesis,inhibit matrix metalloproteinases(MMPs),and modulate oxidative stress.This review emphasizes the opportunity to combine some of the most sophisticated dermal delivery methods(e.g.,liposome,ethosome,and emulgel technologies)with traditional ethnobotanical knowledge to increase bioavailability and efficacy of herbal actives.All research indicates that polyherbal formulations offer a multi-targeted,sustainable,and therapeutically viable alternative to synthetic anti-aging pharmaceuticals,bridging traditional knowledge and contemporary cosmeceutical techniques. 展开更多
关键词 ANTI-AGING Polyherbal formulation COSMECEUTICALS Oxidative stress Synergistic effect
暂未订购
Inhalable formulations in pharmacy:from basic research to clinical applications
12
作者 Yuying Yan Xuebin Yang Zhaoshuai Ji 《Journal of Chinese Pharmaceutical Sciences》 2025年第6期503-518,共16页
In recent years,the rising prevalence of respiratory diseases,coupled with advancements in biotechnology and pharmacology,has positioned inhalable formulations as a preferred method of drug administration.This approac... In recent years,the rising prevalence of respiratory diseases,coupled with advancements in biotechnology and pharmacology,has positioned inhalable formulations as a preferred method of drug administration.This approach enables direct and rapid delivery of medication to the lungs,maximizing therapeutic effects while minimizing dosage and potential side effects.In this review,we meticulously examined current literature and clinical trial databases to present a comprehensive overview of three key areas:(1)inhalation devices currently utilized in clinical settings;(2)the clinical applications of approved inhalable formulations;and(3)preclinical research on inhalable treatments targeting various lung conditions,including pulmonary infections,tuberculosis,lung cancer,pulmonary fibrosis,as well as systemic diseases like Parkinson’s disease.The objective was to delve into both foundational research and the clinical use of inhalable formulations within the pharmaceutical field,with the aim of fostering their broader adoption and guiding the development of inhalable therapies for a more comprehensive range of diseases. 展开更多
关键词 Inhalable formulations Inhalation device Inhaled vaccine Pulmonary infection Inhalable nanomedicine
原文传递
Formulation of a hydrating cream containing Echinacea extract as a preservative and antimicrobial agent
13
作者 Zahra Mirzapour Zahra Zaregheshlaghi +1 位作者 Ebrahim Soleiman Dehkordi Modarres Dehghani 《Journal of Dermatologic Science and Cosmetic Technology》 2025年第4期52-59,共8页
Objective:The purpose of this article is to investigate the performance of Echinacea extract as a preservative and antimicrobial agent in a hydrating cream.Methods:The hydrating cream was prepared by mixing the oil an... Objective:The purpose of this article is to investigate the performance of Echinacea extract as a preservative and antimicrobial agent in a hydrating cream.Methods:The hydrating cream was prepared by mixing the oil and water phases at a temperature of 75±2℃.Then,physicochemical and microbial analyses were performed on the prepared cream using different devices.Results:For proper evaluation and a more detailed examination of the prepared cream,each experiment was performed three times(n≥3),and the average data are reported.The results of the prepared cream indicate that it has a high skin absorption capacity,and the Echinacea extract has given it antimicrobial properties.Other advantages of making this hydrating cream include high hydration to human skin,formulation stability,and a long-lasting effect without creating a two-phase state.Conclusion:Creams have been evaluated as a primary component of cosmetic products as topical preparations from time immemorial due to their ease of use and removal from the skin.In this article,we report the formulation of a hydrating cream using various ingredients.The results obtained from this article demonstrate that this extract can maintain its properties under accelerated stability conditions for 6 months.Also,the prepared cream can eliminate bacteria over 28 days in an effective antimicrobial preservative test. 展开更多
关键词 COSMETICS Hydrating cream Stability testing formulation development Echinacea extract Antimicrobial efficacy Natural preservative
在线阅读 下载PDF
Shenzhuo formulation ameliorates diabetic nephropathy by regulating cytochrome P450-mediated arachidonic acid metabolism
14
作者 Zhong-Yong Zhang Yu-Ming Wang +8 位作者 Ning Wang Yuan-Song Wang Hui Zhang Duo Wang Li-Xin Wang Huan-Tian Cui Wei-Bo Wen Shu-Quan Lv Yong-Jun Cao 《World Journal of Diabetes》 2025年第5期331-345,共15页
BACKGROUND Diabetic nephropathy(DN)is a major complication of diabetes,marked by progressive renal damage and an inflammatory response.Although research has investigated the pathological mechanisms underlying DN,effec... BACKGROUND Diabetic nephropathy(DN)is a major complication of diabetes,marked by progressive renal damage and an inflammatory response.Although research has investigated the pathological mechanisms underlying DN,effective treatment options remain limited.AIM To evaluate the therapeutic impact of Shenzhuo formulation(SZF)on a DN mouse model and to examine its potential molecular mechanisms using transcriptomic and metabolomic approaches.METHODS We established a DN mouse model through a high-fat diet combined with streptozotocin(STZ)injection,followed by SZF treatment.We analyzed SZF’s effects on gene expression and metabolite profiles in renal tissues of DN mice using transcriptomics and metabolomics techniques.Additionally,based on transcriptomic and non-targeted metabolomic findings,we further assessed SZF’s influence on the expression of factors related to the cytochrome P450(CYP450)-mediated arachidonic acid(AA)metabolism pathway,as well as its effects on inflammation and oxidative stress.RESULTS SZF intervention significantly decreased hyperglycemia and mitigated renal function impairment in DN mice.Pathological analysis revealed that SZF treatment improved renal tissue damage,reduced fibrosis,and diminished glycogen deposition.Transcriptomic analysis indicated that SZF influenced mRNA expression of CYP450-related genes,including Cyp2j13,Cyp2b9,Pla2 g2e/Cyp4a12a,Cyp4a32,Cyp2e1,and Cyp4a14.Non-targeted metabolomic results demonstrated that SZF altered the levels of metabolites associated with the AA metabolic pathway,including 5,6-EET,14,15-EET,phosphatidylcholine,and 20-HETE.Further experiments showed that SZF upregulated the expression of CYP4A and CYP2E proteins in renal tissue,as well as CYP2J and CYP2B proteins.Additionally,SZF significantly reduced the expression of inflammatory factors in renal tissue,enhanced antioxidant enzyme activity,and alleviated oxidative stress.CONCLUSION SZF exerts anti-inflammatory and antioxidant effects by regulating CYP450-mediated AA metabolism,leading to improved renal function and improved pathological state in DN mice. 展开更多
关键词 Diabetic nephropathy Shenzhuo formulation TRANSCRIPTOMIC METABOLOMIC Cytochrome P450 Arachidonic acid metabolic INFLAMMATORY Oxidative stress
暂未订购
A two-field mixed formulation with scattered pressure node distribution in element-free Galerkin method for alleviating volumetric locking in hyperelastic materials
15
作者 S.Sai Kumar Albert Shaji Nelson Muthu 《Acta Mechanica Sinica》 2025年第10期115-131,共17页
Rubber-like materials that are commonly used in structural applications are modelled using hyperelastic material models.Most of the hyperelastic materials are nearly incompressible,which poses challenges,i.e.,volumetr... Rubber-like materials that are commonly used in structural applications are modelled using hyperelastic material models.Most of the hyperelastic materials are nearly incompressible,which poses challenges,i.e.,volumetric locking during numerical modelling.There exist many formulations in the context of the finite element method,among which the mixed displacementpressure formulation is robust.However,such a displacement-pressure formulation is less explored in meshfree methods,which mitigates the problem associated with mesh distortion during large deformation.This work addresses this issue of alleviating volumetric locking in the element-free Galerkin method(EFGM),which is one of the popular meshfree methods.A two-field mixed variational formulation using the perturbed Lagrangian approach within the EFGM framework is proposed for modelling nearly incompressible hyperelastic material models,such as Neo-Hookean and Mooney-Rivlin.Taking advantage of the meshless nature of the EFGM,this work introduces a unique approach by randomly distributing pressure nodes across the geometry,following specific guidelines.A wide spectrum of problems involving bending,tension,compression,and contact is solved using two approaches of the proposed displacement-pressure node formulation involving regular and irregular pressure node distribution.It is observed that both approaches give accurate results compared to the reference results,though the latter offers flexibility in the pressure nodal distribution. 展开更多
关键词 Volumetric locking Mixed displacement-pressure formulation EFG method Irregular pressure node distribution Hyperelastic materials
原文传递
RAGEs介导软骨下骨炎症与H-型血管发生促进大鼠骨关节炎的机制研究
16
作者 艾克热木江·阿尔肯 韩小平 +1 位作者 崔泳 黄涛 《南昌大学学报(医学版)》 2026年第1期15-23,共9页
目的探讨RAGEs介导骨关节炎(OA)大鼠模型疾病进展的病理生理机制。方法建立前交叉韧带横断(ACLT)诱导的大鼠OA模型,随机分为假手术组,模型组和RAGE拮抗剂多肽(RAP)组,每组6只。采用HE染色和番红O-固绿染色评估模型大鼠膝关节处软骨损伤... 目的探讨RAGEs介导骨关节炎(OA)大鼠模型疾病进展的病理生理机制。方法建立前交叉韧带横断(ACLT)诱导的大鼠OA模型,随机分为假手术组,模型组和RAGE拮抗剂多肽(RAP)组,每组6只。采用HE染色和番红O-固绿染色评估模型大鼠膝关节处软骨损伤程度,采用免疫组织化学和免疫荧光染色评估模型大鼠膝关节处破骨细胞活性和H-血管形成情况,采用蛋白免疫印迹测定模型大鼠膝关节组织中NF-κB/ERK1/2的磷酸化水平,采用酶联免疫吸附试验(ELISA)测定模型大鼠膝关节组织中炎性细胞因子(TNF-α,IL-1β和IL-6)以及警戒素S100B的水平。建立脂多糖(LPS)和晚期糖基化终产物(AGEs)共激活的HUVECs人血管内皮细胞炎症性细胞模型和MC3T3-E1小鼠颅骨成骨细胞炎症性细胞模型,分为空白对照组,炎症性细胞模型组和炎症性细胞模型+RAP组。用RT-qPCR检测各组细胞人H-型血管分化标志物CD31和EMCN mRNA的表达水平,以及小鼠成骨分化转录因子Runx2和Sp7 mRNA表达水平。结果与假手术组相比,模型组膝关节组织内TRAP+细胞数增多(P<0.05),CD31^(high)EMCN^(high)细胞数增多(P<0.05),VEGF^(+)细胞数和RAGEs^(+)细胞数增多(P<0.05),p-p65和p-ERK1/2水平上调(P<0.05),炎性细胞因子和S100B水平上调(P<0.05)。与模型组相比,RAP组TRAP+细胞数减少(P<0.05),CD31^(high)EMCN^(high)细胞数减少(P<0.05),VEGF^(+)细胞数和RAGEs^(+)细胞数减少(P<0.05),p-p65和p-ERK1/2水平下调(P<0.05),炎性细胞因子和S100B水平下调(P<0.05)。与MC3T3-E1炎症性细胞模型组相比,MC3T3-E1炎症性细胞模型+RAP组Runx2和Sp7 mRNA相对表达水平升高(P<0.05)。与HUVEC炎症性细胞模型组相比,HUVEC炎症性细胞模型+RAP组CD31和EMCN mRNA相对表达水平降低(P<0.05)。结论RAGEs激活软骨下骨NF-κB/VEGF/ERK1/2信号介导慢性低度炎症促进H-型血管发生,促进OA大鼠模型疾病进展。 展开更多
关键词 骨关节炎 h-型血管 血管内皮细胞生长因子 晚期糖基化终产物受体 慢性低度炎症 RAGE拮抗剂多肽 动物 实验 大鼠
暂未订购
The 2025 China New-Formulation Detergent Products Development Conference & The 2025 China Daily Chemicals Forum on Biodegradable,Recyclable and Renewable Technologies Successfully Concluded
17
作者 The editorial office 《China Detergent & Cosmetics》 2025年第4期89-90,共2页
The“2025 China New-Formulation Detergent Products Development Conference & 2025 China Daily Chemicals Biodegradable,Recyclable,Renewable Technology Innovation Summit”,cohosted by the China Research Institute of ... The“2025 China New-Formulation Detergent Products Development Conference & 2025 China Daily Chemicals Biodegradable,Recyclable,Renewable Technology Innovation Summit”,cohosted by the China Research Institute of Daily Chemical(RIDCI),was held in Yangzhou,Jiangsu Province.The event brought together over 230 representatives from government agencies,industry associations,and leading enterprises to contribute insights for the high-quality development of China's daily chemical industry. 展开更多
关键词 biodegradable technologies daily chemicals industry recyclable technologies CONFERENCE renewable technologies summit new formulation detergent products high quality development
在线阅读 下载PDF
块H-矩阵的几个新判据
18
作者 贺永芳 莫宏敏 易红 《吉首大学学报(自然科学版)》 2026年第1期17-24,共8页
定义了一类新的块H-矩阵——块严格α-局部双对角占优矩阵,并给出了块H-矩阵的3个新判据.
关键词 h-矩阵 不可约矩阵 非零元素链矩阵 块严格α-局部双对角占优矩阵
在线阅读 下载PDF
Evaluation of the Effect of High-efficiency Compound Formulations on the Prevention and Control of Sugarcane Brown Stripe
19
作者 Wenfeng LI Xiaoyan WANG +4 位作者 Hongli SHAN Rongyue ZHANG Yinhu LI Jie LI Yingkun HUANG 《Agricultural Biotechnology》 CAS 2022年第3期29-32,37,共5页
[Objectives]This study was conducted to screen high-efficiency compound formulations and precise application technologies for the prevention and control of sugarcane brown stripe disease.[Methods]Carbendazim,benomyl,c... [Objectives]This study was conducted to screen high-efficiency compound formulations and precise application technologies for the prevention and control of sugarcane brown stripe disease.[Methods]Carbendazim,benomyl,chlorothalonil,azoxystrobin,pyraclostrobine and difenoconazole·azoxystrobin were selected for field efficacy tests.[Results]Three formulations,(50%carbendazim WP 1500 g+75%chlorothalonil WP 1500 g+potassium dihydrogen phosphate 2400 g+agricultural synergist 300 ml)/hm^(2),(50%benomyl WP 1500 g+75%chlorothalonil WP 1500 g+potassium dihydrogen phosphate 2400 g+agricultural synergist 300 ml)/hm^(2) and(25%pyraclostrobin 600 ml+potassium dihydrogen phosphate 2400 g+agricultural synergist 300 ml)/hm^(2) had good control effects on sugarcane brown stripe disease,and showed disease index below 14.02 and control efficacy above 84.41%.The three formulations are ideal high-efficiency compound formulations for the prevention and control of sugarcane brown stripe disease.They can be sprayed manually and by unmanned aerial vehicles on the foliar surface from July to August,once every 7 to 10 d,continuously for 2 times.[Conclusions]This study provides new technical support for accurate and efficient prevention and control of sugarcane brown stripe disease. 展开更多
关键词 SUGARCANE High-efficiency compound formulation Precise application Brown stripe disease Control efficacy evaluation
在线阅读 下载PDF
Evaluation of the Effects of High-efficiency Compound Formulations on the Prevention and Control of Sugarcane Brown Rust
20
作者 Wenfeng LI Rongyue ZHANG +4 位作者 Hongli SHAN Xiaoyan WANG Jie LI Yinhu LI Yingkun HUANG 《Agricultural Biotechnology》 CAS 2022年第5期34-37,共4页
[Objectives]This study was conducted to screen high-efficiency compound formulations and precise application technologies for the prevention and control of sugarcane brown rust. [Methods] Zineb, dinconazole, mancozeb,... [Objectives]This study was conducted to screen high-efficiency compound formulations and precise application technologies for the prevention and control of sugarcane brown rust. [Methods] Zineb, dinconazole, mancozeb, azoxystrobin, pyraclostrobin, difenoconazole·azoxystrobin, chlorothalonil and carbendazim were selected for field efficacy tests. [Results] Four formulations,(65% zineb WP 1 500 g+75% chlorothalonil WP 1 500 g+potassium dihydrogen phosphate 2 400 g+agricultural synergist 300 ml)/hm^(2),(12.5% dinconazole WP 1 500 g +75% chlorothalonil WP 1 500 g+potassium dihydrogen phosphate 2 400 g+agricultural synergist 300 ml)/hm^(2),(80% mancozeb WP 1 500 g+75% chlorothalonil WP 1 500 g+potassium dihydrogen phosphate 2 400 g+agricultural synergist 300 ml)/hm^(2) and(30% difenoconazole·azoxystrobin SC 900 ml+potassium dihydrogen phosphate 2 400 g+agricultural synergist 300 ml) had good control efficacy on sugarcane brown rust, and showed disease indexes all below 18.79 and control efficacy over 80.53%. The four formulations are ideal high-efficiency compound formulations for the prevention and control of sugarcane brown rust. They can be sprayed manually and by unmanned aerial vehicles on the foliar surface from July to August, once every 7 to 10 d, continuously for 2 times. [Conclusions] This study provides new technical support for accurate and efficient prevention and control of sugarcane rust. 展开更多
关键词 SUGARCANE High-efficiency compound formulation Precise application Brown rust Control efficacy evaluation
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部