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基于ANCF法的高速铁路接触网接触悬挂系统找形研究
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作者 贾传果 谭牟 +3 位作者 赵进级 张智强 陈奋飞 杨佳 《振动与冲击》 北大核心 2026年第4期109-119,共11页
高速铁路接触网作为结构复杂的架空输电系统,在风荷载、地震作用、弓网耦合作用等情况下会产生动力响应,进行接触网接触悬挂系统的动力响应分析已经成为该领域研究的热点问题。接触悬挂系统的初始找形分析是接触网动力分析的基础,初始... 高速铁路接触网作为结构复杂的架空输电系统,在风荷载、地震作用、弓网耦合作用等情况下会产生动力响应,进行接触网接触悬挂系统的动力响应分析已经成为该领域研究的热点问题。接触悬挂系统的初始找形分析是接触网动力分析的基础,初始找形结果的准确性对动力分析至关重要。基于绝对节点坐标法(absolute nodal coordinate formulation,ANCF)和牛顿迭代法对悬链线悬挂系统进行找形研究。在研究过程中需先建立ANCF静力学平衡方程,并在此基础上确定牛顿迭代的基本方程和变量,而后通过单根索的找形结果验证此法的可靠性,最后分别对一跨标准模型与一个实际的多跨接触网接触悬挂系统进行找形研究,将二者吊弦长度的计算结果与欧洲标准EN 50318—2018中的参考数值进行对比计算后发现相对误差均不超过0.2%,验证了本找形方法的准确性和实用性。 展开更多
关键词 接触网 接触悬挂系统 绝对节点坐标法(ancf) 找形
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Modeling and simulation of aerial refueling multi-body system based on ALE-ANCF method
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作者 Haizhen WANG Yang ZHANG +2 位作者 Zhiwei SUN Bailing LIU Zhaobing JIANG 《Chinese Journal of Aeronautics》 2026年第1期263-277,共15页
The hose-drogue system is a common method for soft aerial refueling,whereby the refueling tanker tows the drogue through the hose.In this paper,a mathematical-physical model of the hose-drogue system is developed and ... The hose-drogue system is a common method for soft aerial refueling,whereby the refueling tanker tows the drogue through the hose.In this paper,a mathematical-physical model of the hose-drogue system is developed and simulated using the Absolute Nodal Coordinate Formulation(ANCF)finite element method.A numerical solution program based on ANCF and ALE(Arbitrary Eulerian-Lagrange)-ANCF method was developed to simulate and analyze the horizontal and elongation release processes of the hose-drogue system at different towing points(underneath the wing and the belly of the aircraft).This program was developed by introducing an ALE description.The numerical solution program,developed based on the ANCF and ALE-ANCF methods,represents a significant advancement in computational efficiency for the rigid-flexible coupled multibody system of the air refueling hose-drogue system.This program can provide a valuable reference for the qualitative design of the hose-drogue multibody system in soft air refueling,while maintaining the necessary accuracy. 展开更多
关键词 Absolute Nodal Coordinate formulation(ancf) Aerial refueling Arbitrary Eulerian-Lagrange(ALE) Multibody system Rigid-flexible coupling
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Research Advances in Pharmacological Effects and Clinical Applications of Rhubarb and Its Compound Formulations in the Treatment of Sepsis
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作者 Yu CHEN Linna LU +1 位作者 Qingmin XING Lijuan SHEN 《Medicinal Plant》 2026年第1期83-91,共9页
This article reviews the research advances in traditional Chinese medicine rhubarb and its compound formulations in the treatment of sepsis,with particular emphasis on elucidating their mechanisms of action and clinic... This article reviews the research advances in traditional Chinese medicine rhubarb and its compound formulations in the treatment of sepsis,with particular emphasis on elucidating their mechanisms of action and clinical application value.Research has demonstrated that rhubarb and its compound formulations exert therapeutic effects via multiple targets and mechanisms,including anti-inflammatory actions,protection of the intestinal barrier,modulation of immune balance,inhibition of oxidative stress,and regulation of associated signaling pathways.Clinically,rhubarb has shown distinct advantages in enhancing gastrointestinal function,mitigating systemic inflammatory responses,and reducing mortality rates among patients with sepsis.These findings provide a foundational reference for the integrated prevention and treatment of sepsis through the combined use of traditional Chinese and Western medicine. 展开更多
关键词 SEPSIS RHUBARB Traditional Chinese medicine Compound formulation Pharmacological effect Clinical application
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Formulation factors influencing the production of dairy-free cheese alternatives
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作者 Elham Alehosseini Paul L.H.McSweeney Song Miao 《Journal of Future Foods》 2026年第6期1028-1040,共13页
Recently,with the efforts of food specialists,protein sources in the diet is rapidly changing.Consequently,novel products based on plant proteins or lab-grown proteins are increasingly being introduced to consumers.Ho... Recently,with the efforts of food specialists,protein sources in the diet is rapidly changing.Consequently,novel products based on plant proteins or lab-grown proteins are increasingly being introduced to consumers.However,the food industry is facing new challenges in creating natural,innovative,accessible,and nutritious dairy-free alternatives.Designing dairy-free cheese alternatives with beneficial nutritional profiles,bioavailability,and digestibility requires a thorough understanding of the molecular characteristics of plant-derived ingredients,their structural assembly,and their role in physicochemical and sensory properties of the final product.In other words,with a deep knowledge of the nature of plant-based ingredients and the intelligent control of intermolecular interactions,these ingredients can be used to produce dairy-free cheese alternatives with the same characteristics as dairy products.Therefore,this review aims to synthesize current knowledge on production techniques and key factors influencing the design of dairy-free cheese alternatives.By examining the interactions between carbohydrates,proteins,and other ingredients,as well as their ability to replicate the functional and textural properties of traditional dairy cheeses,this review provides valuable insights for the development of high-quality dairy-free cheese alternatives.In the design of these alternatives,fractionation and tissue disruption routes are employed.The difference in the number and distribution of their surface groups has a significant effect on ability of plant polysaccharides and proteins to interact with other molecules.Gel strength decreases with decreasing plant biopolymer concentration,bond strength,and crosslinking density.While heat treatment can unfold proteins and minimize their net charge,the hydrophobic attraction becomes the primary driver of protein-protein interactions in plant-based cheeses.In contrast,the 3D-structure of dairy cheeses is stabilized through a combination of hydrophobic interactions,hydrogen bonds,and calcium bridges. 展开更多
关键词 Dairy-free cheese alternatives formulation Fractionation route Tissue disruption route Molecular interactions
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General multi-steps variable-coefficient formulation for computing quasi-periodic solutions with multiple base frequencies
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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
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基于ANCF的复杂地形下深海采矿柔性软管力学特性分析
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作者 邹丽 国奇 +3 位作者 金国庆 于宗冰 胡健 钱浩宇 《东南大学学报(自然科学版)》 北大核心 2025年第3期640-649,共10页
深海采矿系统中柔性软管的空间构型和动态响应直接影响矿物输送效率和管道使用寿命。本文基于绝对节点坐标法(ANCF),建立了几何非线性柔性软管的静力学和动力学模型,系统研究了海底复杂地形下柔性软管的几何参数和力学特性的变化规律。... 深海采矿系统中柔性软管的空间构型和动态响应直接影响矿物输送效率和管道使用寿命。本文基于绝对节点坐标法(ANCF),建立了几何非线性柔性软管的静力学和动力学模型,系统研究了海底复杂地形下柔性软管的几何参数和力学特性的变化规律。结果表明,在不同地形条件下,软管靠近采矿车一端的空间构型显著变化,软管的几何参数(软管两端与y轴夹角α和β,软管弯折角度θ)对地形变化不敏感,但其力学特性(对中间仓和采矿车的牵引力)对地形变化敏感;在几何特性方面,随着采矿车运动,α和β呈线性下降趋势,θ呈线性上升趋势,且α和β的线性变化趋势的斜率一致;在力学特性方面,相同地形下,增加采矿车行驶速度会导致柔性软管牵引力的振动频率降低,振幅增加;相同速度下,凹地形上软管的振幅最小,凸地形上振幅最大。 展开更多
关键词 深海采矿 柔性软管 绝对节点坐标法 复杂地形
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基于ANCF和SPH的柔性降落伞流固耦合动力学仿真 被引量:2
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作者 李庆军 鲁媛媛 +1 位作者 徐方暖 王博 《航空学报》 北大核心 2025年第1期114-128,共15页
针对降落伞在展开后下降过程中,降落伞与空气流场之间的柔性结构流固耦合动力学问题,鉴于绝对节点坐标方法(ANCF)在描述柔性结构大变形问题时,克服了传统有限元建模方法带来的弹性变形与刚性变形强耦合问题,本文基于ANCF建立柔性伞绳和... 针对降落伞在展开后下降过程中,降落伞与空气流场之间的柔性结构流固耦合动力学问题,鉴于绝对节点坐标方法(ANCF)在描述柔性结构大变形问题时,克服了传统有限元建模方法带来的弹性变形与刚性变形强耦合问题,本文基于ANCF建立柔性伞绳和伞衣的力学模型。同时,考虑到光滑粒子流方法(SPH)在流场极大变形时,能够自然地捕获快速移动的界面和自由表面,本文采用SPH模拟空气流场,通过弹簧-阻尼模型描述流体粒子和柔性结构之间的耦合效应,对大柔性降落伞进行流固耦合动力学仿真研究。通过数值试验发现:随着流场速度的增大,降落伞有效面积平均值虽然只出现小幅下降,但随时间变化的幅度显著增加。本文研究结果将为柔性降落伞设计提供理论支撑。 展开更多
关键词 降落伞 流固耦合 绝对节点坐标方法 光滑粒子流方法 动力学
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基于ANCF的两种边界条件下旋转压电层合梁振动特性研究
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作者 刘昊成 陈渊钊 李健 《广西科技大学学报》 2025年第5期17-25,共9页
为分析平面内旋转的两种边界条件下压电层合梁动力学特性,基于绝对节点坐标法(absolute nodal coordinate formulation,ANCF)和Euler-Bernoulli梁理论,采用Green-Lagrangian应变张量和精确曲率公式表示拉伸和弯曲应变,结合压电材料的本... 为分析平面内旋转的两种边界条件下压电层合梁动力学特性,基于绝对节点坐标法(absolute nodal coordinate formulation,ANCF)和Euler-Bernoulli梁理论,采用Green-Lagrangian应变张量和精确曲率公式表示拉伸和弯曲应变,结合压电材料的本构方程推导系统的动能、应变能和电焓,运用第二类拉格朗日方程建立旋转压电层合梁的动力学方程。通过比较本文模型计算结果与文献结果,验证了本模型的正确性。结果表明,相比固支-自由压电层合梁,简支-简支压电层合梁在大范围转动中更容易出现频率转向和振型交换。此外,旋转压电层合梁的感应电压振幅受弯曲振型主导,频率转换对旋转压电层合梁的电压会有较大影响。 展开更多
关键词 绝对节点坐标法(ancf) 旋转压电层合梁 频率转向 振型交换
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Synthesis and microencapsulation of oleic acid sterol ester liquid crystals for its application in sunscreen formulations
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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
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基于ANCF的功能梯度薄椭圆柱壳的自由振动分析
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作者 范博 王忠民 侯思谦 《应用力学学报》 北大核心 2025年第3期629-638,共10页
基于绝对节点坐标(absolute nodal coordinate formulation,ANCF)法研究了功能梯度薄椭圆柱壳的自由振动特性。采用三阶Bézier曲线拟合技术,对ANCF矩形壳单元初始周向切矢量和周向弧长进行了计算,从而避免了椭圆积分计算,增加了拟... 基于绝对节点坐标(absolute nodal coordinate formulation,ANCF)法研究了功能梯度薄椭圆柱壳的自由振动特性。采用三阶Bézier曲线拟合技术,对ANCF矩形壳单元初始周向切矢量和周向弧长进行了计算,从而避免了椭圆积分计算,增加了拟合精度。从动能表达式和格林应变张量与绝对位移的函数关系出发,推导了功能梯度薄椭圆柱壳单元的广义质量矩阵、广义弹性力列阵和广义刚度矩阵。利用达朗贝尔原理,建立了其非线性动力学微分方程组。在系统的平衡位置处,通过引入广义坐标的微小变化量,建立了功能梯度薄椭圆柱壳的线性运动微分方程方程组。通过数值计算,分析了梯度指标、椭圆截面偏心率及长径比对两端简支功能梯度薄椭圆柱壳固有频率的影响。结果表明,材料的弹性模量比、密度比和梯度指标对固有频率有着明显的影响;不锈钢-氧化铝壳的各阶固有频率(周向波数为1~3)随长径比的增大而减小;周向波数为1对应的固有频率随偏心率的增大而增大,且长径比是影响固有频率变化的主要因素。 展开更多
关键词 绝对节点坐标法 功能梯度材料 薄椭圆柱壳 振动特性
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Sensory Characterizations and Optimization of Cashew Apple Jam Formulations Using Baobab Powder as a Source of Pectin
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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
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Identification of bioactive compounds and molecular targets of Fuke Huahuang formulation to treat vaginitis
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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
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Phytoconstituents,mechanisms,and delivery systems in polyherbal formulations for anti-aging skincare:A comprehensive review
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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
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Study and Formulation of a Dietary Cold Sauce Based on Pumpkin Seed Oil and Quail Eggs
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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
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Inhalable formulations in pharmacy:from basic research to clinical applications
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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
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Formulation of a hydrating cream containing Echinacea extract as a preservative and antimicrobial agent
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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
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Shenzhuo formulation ameliorates diabetic nephropathy by regulating cytochrome P450-mediated arachidonic acid metabolism
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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
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A two-field mixed formulation with scattered pressure node distribution in element-free Galerkin method for alleviating volumetric locking in hyperelastic materials
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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
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Kalman filter based state estimation for the flexible multibody system described by ANCF
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作者 Zuqing Yu Shuaiyi Liu Qinglong Tian 《Acta Mechanica Sinica》 2025年第5期207-218,共12页
The state estimation of the flexible multibody systems is a vital issue since it is the base of effective control and condition monitoring.The research on the state estimation method of flexible multibody system with ... The state estimation of the flexible multibody systems is a vital issue since it is the base of effective control and condition monitoring.The research on the state estimation method of flexible multibody system with large deformation and large rotation remains rare.In this investigation,a state estimator based on multiple nonlinear Kalman filtering algorithms was designed for the flexible multibody systems containing large flexibility components that were discretized by absolute nodal coordinate formulation(ANCF).The state variable vector was constructed based on the independent coordinates which are identified through the constraint Jacobian.Three types of Kalman filters were used to compare their performance in the state estimation for ANCF.Three cases including flexible planar rotating beam,flexible four-bar mechanism,and flexible rotating shaft were employed to verify the proposed state estimator.According to the different performances of the three types of Kalman filter,suggestions were given for the construction of the state estimator for the flexible multibody system. 展开更多
关键词 Nonlinear Kalman filter Absolute nodal coordinate formulation Flexible multibody system dynamics State estimation
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The 2025 China New-Formulation Detergent Products Development Conference & The 2025 China Daily Chemicals Forum on Biodegradable,Recyclable and Renewable Technologies Successfully Concluded
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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
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