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Efficacy of aqueous extract of flower of Edgeworthia gardneri(Wall.)Meisn on glucose and lipid metabolism in KK/Upj-Ay/J mice 认领 引用 被引量：2
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作者 ZHANG Chengfei QIN Lingling +6 位作者 WANG Haiyan SUN Boju ZHAO Dan ZHANG Qiue ZHONG Fengying WU Lili LIU Tonghua 《Journal of Traditional Chinese Medicine》 SCIE CSCD 2022年第2期187-193,共7页
OBJECTIVE:To observe the effects of the flower of Edgeworthia gardneri(Wall.)Meisn(EWM)on glucose and lipid metabolism in KK/upj-Ay/J(KKAy)mice and investigate the possible mechanism of EWM in the liver of KKAy mice b... OBJECTIVE:To observe the effects of the flower of Edgeworthia gardneri(Wall.)Meisn(EWM)on glucose and lipid metabolism in KK/upj-Ay/J(KKAy)mice and investigate the possible mechanism of EWM in the liver of KKAy mice by transcriptome analysis.METHODS:Forty KKAy mice were fed a high-sugar and high-fat diet for 3 weeks to establish the animal model of metabolic syndrome.After 5 weeks of continuous administration of EWM,serum high-density lipoprotein(HDL),low-density lipoprotein(LDL),triglycerides(TG),total cholesterol(TC),and free fatty acids(FFA)were detected by radioimmunoassay.Serum fasting insulin(Fins)and adiponectin levels were measured by enzymelinked immunosorbent assay.Liver tissue fixed with paraformaldehyde was stained with hematoxylineosin and oil red O.Transcriptome analysis was used to evaluate the liver tissue.The expressions of lipoprotein lipase(LPL),peroxisome proliferator-activated receptor-γ(PPARγ),adenosine 5‘-monophosphate-activated protein kinase(AMPK),sterol regulatory element binding protein1c(SREBP-1c),and fatty acid synthase(Fas)mRNA and protein in liver tissue were detected by reverse transcription-polymerase chain reaction(RT-PCR)and Western blot analysis.RESULTS:EWM slightly reduced FBG and Fins in KKAy mice.Furthermore,EWM was able to downregulate serum LDL,TG,TC,and FFA and upregulate the expression of serum HDL and adiponectin.Transcriptome analysis revealed the following differential pathways:the peroxisome proliferator-activated receptor(PPAR)signaling pathway and the AMPK signaling pathway.RT-PCR and western blot analysis detected the associated genes and proteins.In addition,EWM was able to upregulate the expression of AMPK and downregulate the expression of PPARγ,SREBP1c,and Fas mRNA and protein and upregulate the expression of LPL mRNA.CONCLUSIONS:EWM can alleviate lipid metabolism disorders and to some extent improve glucose metabolism disorders in KKAy mice.These effects may be related to regulating PPARγ/LPL and activating the AMPK/SREBP1c/Fas pathway. 展开更多
关键词 transcriptome PPAR gamma AMP-activated protein kinases Edgeworthia gardneri(Wall.)Meisn flower
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Determination of Heavy Metals in Dendrobium candidium Wall.ex Lindl.by ICP-MS 认领 引用 被引量：5
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作者 郑龙 杨春亮 +1 位作者 苏子鹏 叶剑芝 《Agricultural Science & Technology》 CAS 2015年第12期2592-2595,共4页
[Objective] This research aimed to establish an inductively coupled plasma mass spectrometry （ICP-MS） method for determination of five kinds of heavy metals （Pb, Cd, Cu, As and Hg） in Dendrobium candidium Wall. ex... [Objective] This research aimed to establish an inductively coupled plasma mass spectrometry （ICP-MS） method for determination of five kinds of heavy metals （Pb, Cd, Cu, As and Hg） in Dendrobium candidium Wall. ex Lindl. [Method] The samples were digested in HNO3-H202 acids system by closed vessel microwave di- gestion. At the same time, internal standard was added to avoid the matrix effect. [Result] The five kinds of heavy meals all showed good linear relationships, and the correlation coefficients ranged from 0.998 2 to 0.999 9. The detection limits of the five kinds of heavy metals were in the range of 0.008-0.750 μg/L, while the stan- dard recovery rates were in the range of 90.4%-96.9%. The relative standard devi- ations ranged from 1.6% to 8.2%. The heavy metals in the Ginseng and Astragalus national standard samples were determined by the established ICP-MS method, and the results were in conformity with the standard values. [Conclusion] The established method has simple and convenient operation and accurate and reliable results, and it meets the requirements by determination of heavy metals in Dendrobium candididium Wall. ex Lindl. 展开更多
关键词 Dendrobium candidium Wall. ex Lindl. Heavy metals Microwave diges- tion： ICP-MS
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Anti-inflammatory Effect of Polysaccharide from Embelia parviflora Wall.on Rheumatoid Arthritis in Rats 认领 引用 被引量：1
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作者 Jiangcun WEI Yong CHEN +5 位作者 Xiumei MA Meiyan QIU Bing QING Leimin JIANG Wen ZHONG Zujie QIN 《Medicinal Plant》 2024年第3期41-44,共4页
[Objectives]To investigate the anti-inflammatory effect of Embelia parviflora Wall.polysaccharide on rheumatoid arthritis(RA)in rats.[Methods]RA rat model was induced by type II collagen.After successful modeling,the ... [Objectives]To investigate the anti-inflammatory effect of Embelia parviflora Wall.polysaccharide on rheumatoid arthritis(RA)in rats.[Methods]RA rat model was induced by type II collagen.After successful modeling,the rats were divided into model group,positive group,low,medium and high dose of E.parviflora Wall.polysaccharide groups,and normal control group.Body mass,toe volume and arthritis index were measured,and thymus index and spleen index were calculated.The levels of interleukin-1β,interleukin-6 and tumor necrosis factor-αin serum and synovial tissue of ankle joint were detected by ELISA.[Results]Compared with the normal control group,the pathological changes such as synovial hyperplasia and unclear layer were observed in the model group,the body mass was decreased(P0.05).[Conclusions]E.parviflora Wall.polysaccharide can reduce the body's inflammatory response and improve RA,which may be related to the inhibition of the activation of inflammatory cytokines IL-1β,IL-6 and TNF-α. 展开更多
关键词 Polysaccharide from Embelia parviflora Wall. Rheumatoid arthritis (RA) Anti-inflammatory effect
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On the HPLC Fingerprint of Zhuang Medicine Spilanthes paniculata Wall. ex DC. 认领 引用
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作者 Li LI Fengfeng XIE +2 位作者 Pinghua YAN Xiangyan ZENG Yi CAI 《Medicinal Plant》 2019年第3期19-23,共5页
[Objectives] To establish the HPLC fingerprint of Spilanthes paniculata Wall. ex DC. and provide reference for the quality control of medicinal materials. [Methods]Welch Ultimate XB-C18( 5 μm,250 mm ×4. 6 mm) ch... [Objectives] To establish the HPLC fingerprint of Spilanthes paniculata Wall. ex DC. and provide reference for the quality control of medicinal materials. [Methods]Welch Ultimate XB-C18( 5 μm,250 mm ×4. 6 mm) chromatographic column was adopted,and the mobile phase was acetonitrile-0. 1% phosphoric acid aqueous solution for gradient elution,the detection wavelength was 328 nm,the column temperature was 25 ℃,the similarities of 18 different batches of medicinal materials were evaluated,and the HPLC fingerprint chromatogram of S. paniculata Wall. ex DC. was set up. [Results] The RSDs of precision,repeatability and stability of HPLC fingerprint of 18 batches of S. paniculata Wall. ex DC. medicine materials were all less than 3%;HPLC reference fingerprint of the medicine materials was established.[Conclusions]HPLC fingerprint was established,its data were stable and reliable,and the method was simple and efficient,which could provide reference for the quality evaluation of Zhuang medicine S. paniculata Wall. ex DC. 展开更多
关键词 Zhuang medicine Spilanthes paniculata Wall. ex DC. HPLC Fingerprint
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Optimization of Extraction Process and Antioxidant Activity of Polysaccharide in Embelia parviflora Wall.by RSM 认领 引用 被引量：1
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作者 Wenli LI Xianxian LIU +6 位作者 Xiaolian LIANG Yong CHEN Danqing PANG Zhouyan HUANG Qian HAN Wenjun LIU Liangni CHEN 《Medicinal Plant》 2020年第3期34-38,42,共5页
[Objectives]To optimize the extraction process of polysaccharide in Embelia parviflora Wall.by response surface methodology,and to study the antioxidant activity in vitro of polysaccharide in E.parviflora,so as to pro... [Objectives]To optimize the extraction process of polysaccharide in Embelia parviflora Wall.by response surface methodology,and to study the antioxidant activity in vitro of polysaccharide in E.parviflora,so as to provide a basis for the further development and utilization of E.parviflora.[Methods]The solid-to-liquid ratio,extraction temperature,extraction time and extraction times were used as single factors to investigate the effects.On this basis,the response surface methodology(RSM)was used to optimize the extraction process of polysaccharide in E.parviflora.DPPH and ABTS free radicals were used to investigate the antioxidant capacity of polysaccharide in E.parviflora.[Results]The optimal solid-to-liquid ratio for extraction of polysaccharide from E.parviflora was 32∶1(mL/g),extraction temperature was 77℃,and extraction time was 36 min.The IC50 values of DPPH and ABTS were 0.04 and 0.03 mg/mL,respectively.[Conclusions]The optimized extraction process of polysaccharide in E.parviflora is stable,the extraction rate is high,and has strong antioxidant activity.It is expected to provide a reference for the industrial extraction of polysaccharide from E.parviflora. 展开更多
关键词 Embelia parviflora Wall. Polysaccharide Response surface methodology(RSM) Antioxidant activity
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Jadwar(Delphinium denudatum Wall.):a medicinal plant 认领 引用
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作者 Roghayeh Baghervand Navid Mehrdad Karimi +5 位作者 Morteza Ghojazadeh Seyed Mostafa Araj-Khodaei Alireza Bagherzadeh karimi Sanam Dolati Mehri Bansans Seyed Mohammad Bagher Fazljou 《Traditional Medicine Research》 2020年第6期487-497,共11页
Delphinium denudatum Wall.is one of the important medicinal herbs of traditional Persian medicine and is known as Jadwar.Medicinal plants are the most widely used drugs in traditional Persian medicine and has been use... Delphinium denudatum Wall.is one of the important medicinal herbs of traditional Persian medicine and is known as Jadwar.Medicinal plants are the most widely used drugs in traditional Persian medicine and has been used for various diseases since earlier times.The medicinal uses of Delphinium denudatum Wall.date back to over 1,000 years ago.Rhazes(845–925 C.E.)was the first Persian physician and scientist who reported the use of Delphinium denudatum Wall.as a herbal remedy.During the following centuries,the usages of Delphinium denudatum Wall.in the treatment of various diseases has been mentioned in the books and references of traditional Persian medicine for cures to various diseases such as neurologic and psychiatric disease,gastrointestinal disease,fever,pain,and poisoning.According to modern studies,the dried roots of Delphinium denudatum Wall.have antipyretic,antimicrobial,anticonvulsant,hepatoprotective,antioxidant,and pain-relieving properties.Biomolecules from roots of Delphinium denudatum Wall.were also identified as potential cures for central nervous system diseases as well as for the amelioration of morphine addiction.Delphinium denudatum Wall.,with its properties involving the prevention of mitochondrial dysfunction,reduction of oxidative stress,and inflammation and immune dysregulation,can be utilized in curing inflammatory disorders.The effective therapeutic influence of root extract of Delphinium denudatum Wall.against several diseases needs to be confirmed through controlled clinical trials.This article reviews the different features of Delphinium denudatum Wall.and focuses on the well-known therapeutic effects of this herbal drug on various human disorders and animal disease models. 展开更多
关键词 Delphinium denudatum Wall. Jadwar root Traditional Persian medicine Neurologic and psychiatric effects Anticonvulsant effects
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Macropropagation and Production of Clonal Planting Materials of Panax pseudoginseng Wall. 认领 引用
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作者 Sakutemsu Lolen Jamir Chitta Ranjan Deb Nangshimeren Sakutemsu Jamir 《Open Journal of Forestry》 2016年第2期135-141,共7页
Panax pseudoginseng Wall., a highly medicinal, herbaceous, long-lived plant, grows in the forest litter of shady primary forest. The species is threatened in the natural habitat due to unsustainable harvesting of rhiz... Panax pseudoginseng Wall., a highly medicinal, herbaceous, long-lived plant, grows in the forest litter of shady primary forest. The species is threatened in the natural habitat due to unsustainable harvesting of rhizome for medicine and habitat destruction. The species has very poor adaptive power to the synthetic environment and fails to grow and propagate. Present study was undertaken to develop suitable low cost propagation technique and produce clonal planting materials through rhizome splitting and root cutting. Rhizomes and roots were cut into segments and sowed in the raised soil bed prepared by mixing decayed wood powder, sand and top black soil at 1:1:3 ratios in a shaded poly house. Of the sowed rhizome segments ~55% segments remained recalcitrant to morphogenetic response in the first year of the study and the response improved in the subsequent years. In the third year ~51% rhizome segments responded positively. The horizontal root cuts mostly remained morphogenetically dormant but inclined root cuts exhibited better response. The morphogenetic response from the roots was comparatively very poor compare to rhizome segments. The plantlets formed both rhizome segments and root cuttings were maintained for three years in the bed/pots followed by transferring in the cultivated plots. 展开更多
关键词 Panax pseudoginseng Wall. Macropropagation Medicinal Plant Rhizomes Splitting Root Propagation
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Extraction Process and Antioxidant Activity of Polysaccharides from Cyathula Capitata(Wall.)Moq. 认领 引用
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作者 Jingxia WANG Keyong ZHU +1 位作者 Yuanhong SHANG Yuan LIU 《Medicinal Plant》 2018年第5期31-35,共5页
[Objectives]To optimize the ultrasonic-assisted extraction process of polysaccharides from Cyathula Capitata(Wall.)Moq.and evaluate its antioxidant capacity in vitro.[Methods]The single factor orthogonal design was ap... [Objectives]To optimize the ultrasonic-assisted extraction process of polysaccharides from Cyathula Capitata(Wall.)Moq.and evaluate its antioxidant capacity in vitro.[Methods]The single factor orthogonal design was applied to explore the effects of ultrasonic time,solid-to-liquid ratio,extraction time and ethanol precipitation concentration on the extraction rate of crude polysaccharides from C.Capitata,to obtain the optimal extraction process;DPPH and ABTS^+free radical scavenging ability was detected to evaluate its in vitro antioxidant activity.[Results]The optimal extraction process of C.Capitata crude polysaccharide was as follows:solid-to-liquid ratio was 40∶1,the extraction temperature was 50℃,the ultrasonic time was 80 min.Under such conditions,the extraction rate of C.Capitata crude polysaccharide was 10.51%,and the purity was 56.9%;C.Capitata crude polysaccharide has good scavenging ability to DPPH and ABTS^+free radicals,and its IC50values are 0.468 and 0.231 mg/mL,respectively.[Conclusions]The optimized process is simple and feasible,and the C.Capitata polysaccharide has good antioxidant activity in vitro.This experiment provides a basis for the further development and utilization of the C.Capitata polysaccharide. 展开更多
关键词 Cyathula Capitata(Wall.)Moq. Polysaccharide Extraction process Antioxidant activity
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Chemical Composition of Fruit of Embelia undulata(Wall.)Mez 认领 引用
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作者 Ling CHAI Jiantong YUAN +1 位作者 Mingsheng CHEN Buming LIU 《Medicinal Plant》 2021年第3期24-26,共3页
[Objectives]To study the chemical constituents of the fruit of Embelia undulata(Wall.)Mez.[Methods]Silica gel column chromatography,gel column chromatography,recrystallization,high-performance preparative liquid chrom... [Objectives]To study the chemical constituents of the fruit of Embelia undulata(Wall.)Mez.[Methods]Silica gel column chromatography,gel column chromatography,recrystallization,high-performance preparative liquid chromatography and other modern separation methods and techniques were used to separate and purify the chemical components of the ethyl acetate fraction of the fruit of E.undulata(Wall.)Mez,and based on the physical and chemical properties and spectral data,their structure was identified.[Results]Six compounds were isolated from the fruit of E.undulata(Wall.)Mez,including trimethyl citrate(1),vanillic acid(2),5-hydroxymethylfurfural(3),1,5-dimethyl citrate(4),1,6-dimethyl-5-ethyl citrate(5)and 3,4-dihydroxybenzoic acid(6).[Conclusions]Compounds 1-6 are all isolated from E.undulata(Wall.)Mez for the first time. 展开更多
关键词 Embelia undulata(Wall.)Mez Fruit Ethyl acetate fraction Chemical constituent
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Biological Characteristics of Alternaria tenuissima on Dendrobium sandidium Wall.et Lindl. 认领 引用
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作者 Yue Haimei Gong Wenfeng Wang Mu 《Plant Diseases and Pests》 2014年第6期22-24,共3页
Biological characteristics of Alternaria tenuissima on Dendrobium sandidium Wall. et Lindl. were studied. The result showed that A. tenuissima on D. sandidium Wall. et Lindl. could grow at temperature 5 -35 ℃and pH v... Biological characteristics of Alternaria tenuissima on Dendrobium sandidium Wall. et Lindl. were studied. The result showed that A. tenuissima on D. sandidium Wall. et Lindl. could grow at temperature 5 -35 ℃and pH value of 2 - 10, the optimal temperature and pH value were 25℃ and 7 for its growth and sporulation, respectively. Starch was the optimal carbon sources and peptone was the optimal nitrogen source for the growth and sporulation of bacterial colony, re- spectively; PSA and PCA were the optimal media for its growth and sporalation, respectively. 展开更多
关键词 Alternaria tenuissima Dendrobium sandidium Wall. et Lindl. Biological characteristics
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Study on Quantity Value Transfer Relationship of Triplostegia glandulifera Wall.ex DC. Decoction Pieces-Standard Decoction-Finished Product 认领 引用
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作者 Fang TIAN Yanmei GENG +3 位作者 Xueli LI Han GAO Yan LI Junshan LI 《Medicinal Plant》 2024年第6期11-17,共7页
[Objectives] In order to develop Triplostegia glandulifera Wall.ex DC. into foromula granules, a high performance liquid chromatography (HPLC) determination method and a TLC identification method for loganic acid in d... [Objectives] In order to develop Triplostegia glandulifera Wall.ex DC. into foromula granules, a high performance liquid chromatography (HPLC) determination method and a TLC identification method for loganic acid in decoction pieces, standard decoction and formula granules of T. glandulifera were established, and the quantity value transfer relationship of T. glandulifera pieces-standard decoction-formula granules was investigated.[Methods] An Agilent 1260 II high performance liquid chromatograph and a Waters Symmetry C18 column (4.6 mm×250 mm, 5 μm) were used to perform gradient elution with acetonitrile-0.1%phosphoric acid solution as the mobile phase at a column temperature of 30 ℃ and a flow rate of 1 mL/min, and the detection wavelength was 240 nm. The TLC identification method of T. glandulifera was established using ethyl acetate-methanol-water (10 : 2 : 1) as the developer, and examination was carried out under a UV lamp (254 nm). The quantity value transfer law was analyzed by using the extract yield, the content of loganic acid and TLC chromatograms as the main evaluation indexes.[Results] The method for the determination and identification of loganic acid is stable, reproducible and reliable. The average yield, average loganic acid content and average loganic acid content transfer rate of 3 batches of T. glandulifera formula granules were, respectively, 18.7%, 41.1 mg/g and 43.1%, each of which was within corresponding range of mean±3SD of the 15 batches of standard decoction.[Conclusions] The content determination and TLC identification methods of loganic acid can be used to evaluate the quality of T. glandulifera formula granules. This study provides data basis for further research on T. glandulifera formula granules, and promotes the modernization of medicines for ethnic minorities. 展开更多
关键词 Pharmaceutics of Chinese medicine Triplostegia glandulifera Wall.ex DC. Standard decoction Loganic acid Content determination
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Study on the Motion Characteristics of Floating Bubbles near the Wall Based on OpenFOAM 认领 引用 被引量：1
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作者 Jie Cui Tao Xia +2 位作者 Zhaoyu Qu Xin Chen Mingyuan Li 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第1期32-45,共14页
In this study,the dynamic characteristics of microscale floating bubbles near the vertical wall are studied.This occurrence is common in industrial and natural phenomena.Although many studies have been conducted on mi... In this study,the dynamic characteristics of microscale floating bubbles near the vertical wall are studied.This occurrence is common in industrial and natural phenomena.Although many studies have been conducted on microscale bubbles,few studies investigate floating bubbles with very small Reynolds number(Re)near the wall,which is the main research goal of this study.Therefore,this study establishes a model for the ascent of small-scale bubbles near a vertical wall using the interFoam solver in OpenFOAM.This study investigates the influences of diverse viscosity parameters,varying distances from the wall,and different gas flow rates on the terminal velocity,deformation,and motion trajectory of bubbles.The results reveal that as liquid viscosity increases,the Re of bubbles gradually decreases and reaches a minimum of 0.012,which is similar to the Re of micrometer-sized bubbles in water.The characteristics of the wall-induced force in the longitudinal direction are closely related to the changes in liquid viscosity.Under low-viscosity conditions,the induced lift is the principal form of action,whereas under high-viscosity conditions,it is primarily manifested as induced drag. 展开更多
关键词 Rising bubble Viscosity Low Reynolds number Near wall bubbles OpenFOAM
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Quick evaluation method of rock damage depth in intermediate walls subjected to closely-spaced cavern blasting 认领 引用
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作者 Xudong Jiang Guoyuan Peng +3 位作者 Ke Lu Xingtao Ren Yang Zhao Xiaomu Liao 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第6期330-347,共18页
During the construction of underground caverns,the rock masses of intermediate wall between closelyspaced caverns are easy to be destroyed due to excessive blast-induced damage.Limited to the current measurement techn... During the construction of underground caverns,the rock masses of intermediate wall between closelyspaced caverns are easy to be destroyed due to excessive blast-induced damage.Limited to the current measurement technology,we cannot achieve rapid assessment of the rock damage,making it difficult to realize real-time adjustments to the blast design.Given that the blast vibration is relatively easy to acquire,the study establishes a correlation between the peak particle velocity(PPV)and the damage depth within the intermediate wall.A field measurement of the blast vibration was conducted in a scenario of excavating closely-spaced caverns.A dynamic finite element model was thereafter established and loaded via the equivalent elastic boundary(EEB)method.The model was verified based on the measurement data of blast vibration,together with an appropriate load amplification coefficient.Then,a series of small dimensional models with single-borehole were created to obtain the rock damage extent under various charge quantity in the near-blast area,while a large dimensional EEB model was applied to capture the PPV distribution in the far-field of blasting under the corresponding charge quantities.Finally,the blast-induced damage depth of the intermediate wall and the PPV at a certain blast center distance were correlated by the charge quantity.The relationships between PPV and damage depth at different blast center distance were fitted.The results indicate that deploying vibration monitoring at about 40 m or 50 m from the blasting face can estimate in advance the damage depth of intermediate wall,which can help provide some guidance to the blast of closely-spaced caverns. 展开更多
关键词 Closely-spaced caverns Intermediate wall Blast-induced damage Blast vibration Peak particle velocity
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Guanidinium-Based Covalent Organic Frameworks via Pore Wall Regulation:Efficient Selective Palladium Recovery From Metallurgical Wastewater 认领 引用
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作者 Jiaxing Xiong Changhao Liang +7 位作者 Zhuang Yang Chuntang Liu Mingzhu Dai Rifang Qiu Xian Yuan Fengzhi Jiang Shixiong Wang Xiangjun Yang 《Rare Metals》 SCIE EI CAS CSCD 2026年第5期418-432,共15页
Recovering palladium(Pd)from low-concentration metallurgical wastewater still poses significant challenges.In this study,triaminoguanidine hydrochloride was used as the key functional site,and three guanidine-function... Recovering palladium(Pd)from low-concentration metallurgical wastewater still poses significant challenges.In this study,triaminoguanidine hydrochloride was used as the key functional site,and three guanidine-functionalized covalent organic frameworks(GCOFs)were successfully constructed by adjusting the substituents(-H,-OH,and-OCH3)on terephthalaldehyde molecules,and their extraction performance towards palladium was explored.First,multiple characterization techniques,including scanning electron microscopy,zeta potential analysis,and contact angle measurement,were employed to systematically investigate the regulatory rules of substituents on the physicochemical properties of GCOFs,such as their micromorphology,surface potential,and hydrophilicity.Second,static adsorption experiments were conducted to systematically study the adsorption behavior of GCOFs with different substituents toward Pd(Ⅱ),and the maximum sorption capacity of COF-H is up to 180 mg g-1.Furthermore,this study successfully fabricated GCOFs into aerogels by means of freeze-drying technology and conducted dynamic adsorption experiments with actual metallurgical wastewater.Specifically,70.0 mg of COF-H/aerogel is capable of continuously treating 12.5 L of metallurgical wastewater.In conclusion,by regulating the types of substituents,this study clarified the influence rules of substituent effects on the Pd(Ⅱ)adsorption performance of GCOFs in metallurgical wastewater.The developed GCOFs/aerogels hold broad application potential in the fields of precious metal resource recovery and environmental protection. 展开更多
关键词 COFs Guanidinium functionalization metallurgical wastewater Pd(II)recovery pore wall regulation
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Cotton fiber length was shortened under high temperature by inhibition of cell wall loosening and acceleration of secondary wall synthesis 认领 引用
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作者 Liuyan Yang Manli Zhao +5 位作者 Wenting Tang Wei Hu Zhiguo Zhou Baiqing Chen Qiuxiang Tang Wenqing Zhao 《The Crop Journal》 SCIE CSCD 2026年第3期821-834,共14页
To determine how high temperature(HT)impairs cotton fiber elongation,greenhouse experiments compared two temperature regimes(CT,28℃HT,38℃)for 12 d.The findings indicated that compared with CT,the fiber elongation ra... To determine how high temperature(HT)impairs cotton fiber elongation,greenhouse experiments compared two temperature regimes(CT,28℃HT,38℃)for 12 d.The findings indicated that compared with CT,the fiber elongation rate initially increased during HT(0-8 d),but subsequently decreased,resulting in a significant decrease in cotton fiber length at harvest.At 3 and 6 d under HT,cell turgor pressure increased;additionally,the auxin and ethylene content in fiber significantly increased,promoting cell wall loosening and increasing elongation rate through regulating xyloglucan endoglycosyltransferases/hydrolases and expansin.At 12 d under HT,cellulose and hemicellulose decomposition were inhibited in fiber,which hindered cell wall loosening and restricted fiber elongation.Meanwhile,the lipid and callose content in fiber was increased,and the enhanced abscisic acid and H2O2content promoted lignin synthesis by up-regulating the expression of WLIM1a gene.Both changes accelerated the initiation of secondary wall synthesis.Consequently,the transition stage that coincides with fiber elongation and secondary wall thickening was reduced by 0.3-0.5 d,leading to a decrease in fiber length.In summary,fiber length was reduced under HT,accompanied by restricted cell wall loosening and accelerated secondary wall synthesis. 展开更多
关键词 Cotton(Gossypiumhirsutum L.) High temperature Fiber elongation Secondary wall synthesis
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Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model 认领 引用
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作者 Maolin Tian Jiabao Wang +4 位作者 Changsheng Wang Shijie Sun Lijun Han Qingbin Meng Sunhao Zhang 《Deep Underground Science and Engineering》 EI CAS CSCD 2026年第1期127-143,共17页
The deformation and failure of coal walls in front of a working face cause significant difficulties during mining operations.This study reveals the nonuniform distribution of bearing pressure in front of coal walls ba... The deformation and failure of coal walls in front of a working face cause significant difficulties during mining operations.This study reveals the nonuniform distribution of bearing pressure in front of coal walls based on in situ monitoring data and numerical simulation.Therefore,an eccentric compression mechanical model was established to study the deformation and failure characteristics of a coal wall.The slenderness ratio of the compression bar is introduced to define coal walls.The results showed that instability failure occurs when λ>λc and material failure occurs when λ≤λc.The instability failure-type coal wall spalling was related to the mining height,eccentricity of roof pressure,the horizontal force,and the reaction moment of the floor.The material failure-type coal wall spalling was related to the cohesion,the internal friction angle of the coal,the upper pressure,and the horizontal force of coal walls.Unstable and destructive coal wall peeling usually occurs at a height of 0.5–0.6 times the mining height,while material damage to coal wall peeling is determined to occur within the range of 0.4-0.6 times the mining depth.The findings contribute to the understanding of the deformation and failure of coal walls. 展开更多
关键词 coal wall spalling eccentric compression mechanical model failure mechanism instability failure shear failure
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Deflection of foundation pit retaining wall in heterogeneous soil strata:Intelligent prediction methods based on physics-informed machine learning 认领 引用
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作者 Cong Zhou Lei He +3 位作者 Junchen He Yi Zhang Huaiguang Xiao Chee Kiong Soh 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第5期4007-4022,共16页
Excavation-induced retaining wall deflection(RWD)significantly influences the safety of surrounding built environment.To predict the three-dimensional RWD in heterogeneous strata,a new partial differential equation(PD... Excavation-induced retaining wall deflection(RWD)significantly influences the safety of surrounding built environment.To predict the three-dimensional RWD in heterogeneous strata,a new partial differential equation(PDE)is derived in this study,and two prediction models are proposed,i.e.the physics-informed neural network(PINN)model and the data-driven PINN model.As a physical constraint,the new PDE is crucial to the loss functions of these models.Then,the validity of the models is verified and analysed using a subway deep-foundation pit.The results show that the training times of both models are controlled within 900 s,which is a significant reduction compared to that of the conventional numerical model.In addition,the prediction accuracy of the data-driven PINN model is higher than that of the numerical model,while that of the PINN model is slightly lower than that of the numerical simulation.However,in contrast to the data-driven PINN model,the PINN model can identify irregular soil interfaces in heterogeneous strata to learn the deflection continuity conditions at irregular interfaces and realize RWD prediction in non-uniform distributed strata.In practical applications in foundation pit engineering,the selection of the PINN and data-driven PINN models can be conducted according to the in situ distribution conditions of the strata to enable the early prediction of potential RWD,thereby providing a reliable basis for the further optimisation of retaining structures design. 展开更多
关键词 Heterogeneous soil strata Braced excavation Retaining wall deflection(RWD) Soil-structure interaction Physics-informed neural networks(PINNs)
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Wall Thickness Homogenization Control and Performance of Superplastically Formed Hemispherical Shell of TC4 Titanium Alloy 认领 引用
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作者 Ji Wei Zhang Zhaohuang +3 位作者 Lu Zichuan Wei Shi Qiu Xuyangfan Zhang Xuhu 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第7期1683-1691,共9页
Spherical and capsule-shaped surface tension tanks are widely used in satellite,spacecraft,and other fields due to their advantages of lightweight structure,high efficiency,and high reliability.With the advancement of... Spherical and capsule-shaped surface tension tanks are widely used in satellite,spacecraft,and other fields due to their advantages of lightweight structure,high efficiency,and high reliability.With the advancement of space exploration,the demands for thinner walls,more complex structures,and uniform overall performance in the hemispherical shells of these tanks present significant challenges for hemispherical shell forming technique.A hemispherical shell with uniform wall thickness was prepared using the rapid direct-and-reverse superplastic forming method.Results reveal that the properties and microstructure of each section of the formed hemisphere shell are consistent with those of the initial plate,and the overall shell thickness is highly uniform. 展开更多
关键词 hemispherical shell of storage tank control of wall thickness direct-and-reverse superplastic forming mold design
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Effects of Flow Separation on Particle Dynamics in Negative Pressure Near-Wall Collection System 认领 引用
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作者 LI Xiu XU Li-xin +3 位作者 LIU Ya-jiao DOU Pei-lin HONG Zhi-chao HAN Chao-shuai 《China Ocean Engineering》 SCIE EI CSCD 2026年第1期158-168,共11页
The negative pressure near-wall particle collection method employs suction flow to circulate the medium along the inner wall of the collection port,creating flow separation that affects flow characteristics and partic... The negative pressure near-wall particle collection method employs suction flow to circulate the medium along the inner wall of the collection port,creating flow separation that affects flow characteristics and particle forces.This investigation utilizes a CFD simulation method,validated through Zhao’s experiments,and implements a“circular pipe suction model”to examine how collection port parameters-specifically wall thickness and shape-influence the flow field and particle collection efficiency across different Reynolds numbers.The findings demonstrate that wall thickness and port shape substantially affect flow separation,as evidenced by recirculation zones that compress the flow and modify the particle force coefficient.Typically,greater wall thickness results in decreased particle force coefficients,with variations up to 15%.Moreover,collection ports with inward-pointing sharp angles demonstrate the highest particle force coefficients,while those with outward-pointing angles show the lowest,exhibiting variations up to 23%.These results indicate that optimizing collection port design through wall thickness and shape modifications can improve particle collection efficiency,enhancing practical applications. 展开更多
关键词 negative pressure near-wall collection system flow separation collection head wall thickness collection head collection port shape
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Zigzag domain walls unravel the polarization switching puzzle in wurtzite ferroelectrics 认领 引用
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作者 Hang Zang Zhiming Shi +1 位作者 Xiaojuan Sun Dabing Li 《Journal of Semiconductors》 EI CAS CSCD 2026年第6期33-36,共4页
In the past decade,the discovery of robust ferroelectricity in scandium-doped aluminum nitride(Al1−xScxN)[1]has ignited a new wave of research in the semiconductor community.Unlike traditional perovskite ferroel... In the past decade,the discovery of robust ferroelectricity in scandium-doped aluminum nitride(Al1−xScxN)[1]has ignited a new wave of research in the semiconductor community.Unlike traditional perovskite ferroelectrics(such as PbZrTiO3 or PZT)[2],wurtzite-structured materials are fully compatible with modern CMOS fabrication processes[3]. 展开更多
关键词 cmos fabrication processes zigzag domain walls scandium doped aluminum nitride wurtzite ferroelectrics semiconductor community robust ferroelectricity perovskite ferroelectrics such polarization switching
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