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Grafting Modification of Cellulose Nanofibril with 2-(N,N-Dimethylamino)Ethyl Methacrylate and 2-Hydroxyethyl Methacrylate as a Barrier-Improved Coating for Paper-Based Food Packaging
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作者 Noverra Mardhatillah Nizardo Alifah Nurul Saffanah +4 位作者 Annisa Fitri Salsabila Amanda Aurellia Putri Aniek Sri Handayani Azizah Intan Pangesty Mochamad Chalid 《Journal of Renewable Materials》 2025年第6期1209-1227,共19页
Food packaging is becoming popular as the consumption of ready-to-eat food products rises.Easyto-use,non-biodegradable plastic packaging is commonly used in food packaging,contributing to the deteriorating environment... Food packaging is becoming popular as the consumption of ready-to-eat food products rises.Easyto-use,non-biodegradable plastic packaging is commonly used in food packaging,contributing to the deteriorating environmental situation.This issue increases the concern for the environment and encourages the usage of alternative materials.Cellulose nanofibrils(CNF)are abundant and biodegradable,which makes them ideal candidates to replace plastic coatings.The ability to form H-bonds between the hydroxyl groups makes coated paper with CNF have good strength,but poor barrier properties.The barrier properties can be improved by grafting DMAEMA or HEMA onto CNF(CNF-g-PDMAEMA and CNF-g-PHEMA,respectively).Thus,the objective of this study was to modify CNF chemically to enhance the barrier properties of the food packaging paper.It was found that paper coated with CNFg-PDMAEMA and CNF-g-PHEMA exhibited improvements in mechanical and barrier properties while maintaining the desired viscosity for the coating process.The water contact angle increased for paper coated with CNF-g-PHEMA and CNF-g-PDMAEMA,reaching a maximum of 97.51°and 92.58°,respectively with the decreasing Cobb_(60) values by 49% and 11%.The oil absorption was also reduced for both coated papers compared to the blank paper.Mechanical properties improved,as indicated by a 3% increase in tensile strength for paper coated with CNF-g-PHEMA and a 5% for paper coated with CNF-g-PDMAEMA.The results indicated significant potential for the application of modified CNF in coatings for food packaging paper.Noteworthy,the grafting process should be improved to enhance the mechanical and barrier properties of the coated paper. 展开更多
关键词 Cellulose nanofibril grafting biopolymer modification paper coating barrier properties
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Posterior pericardiotomy: An effective strategy for reducing postcoronary artery bypass grafting complications, with considerations for pleural effusion risk
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作者 Muneeb Khawar Syed Abdullah Shah +7 位作者 Ayesha Khan Abdullah Waseem Hanan Saeed Ayesha Fatima Muneeb Saifullah Abbas Muhammad Mehdi Abdul Qadeer Mirza Muhammad Hadeed Khawar 《World Journal of Cardiology》 2025年第10期130-139,共10页
BACKGROUND Postoperative complications such as atrial fibrillation and pericardial effusion are frequent after coronary artery bypass grafting(CABG),contributing to increased morbidity and prolonged hospital stays.Pos... BACKGROUND Postoperative complications such as atrial fibrillation and pericardial effusion are frequent after coronary artery bypass grafting(CABG),contributing to increased morbidity and prolonged hospital stays.Posterior pericardiotomy(PP),a surgical technique involving incision of the posterior pericardium to allow drainage,has been suggested as a preventive measure.However,its overall efficacy and safety profile,including potential risks like pleural effusion,require comprehensive evaluation amid varying study qualities.We hypothesized that PP reduces key post-CABG complications compared to standard care.AIM To determine the efficacy of PP in reducing postoperative complications following CABG.METHODS This systematic review and meta-analysis included randomized controlled trials(RCTs)from PubMed,Cochrane,ClinicalTrials.gov,and Ovid,comparing PP vs no PP in adult CABG patients.Studies were conducted in tertiary care hospital settings.Twenty RCTs with 5331 participants were selected based on predefined inclusion criteria.The intervention involved intraoperative PP.Primary outcome was postoperative atrial fibrillation(POAF);secondary outcomes included effusions,tamponade,hospital/intensive care unit stay,and bleeding revisions.Risk ratios(RRs),mean differences,and 95%confidence intervals(CIs)were calculated using random-effects models;heterogeneity assessed via I^(2) statistic.RESULTS Twenty RCTs analyzed 5331 patients(2665 with PP vs 2666 without).PP significantly lowered POAF(10%vs 21%;RR=0.48,95%CI:0.36-0.65,P<0.00001;I^(2)=70%),cardiac tamponade(0.5%vs 3%;RR=0.16,95%CI:0.08-0.34,P<0.00001;I^(2)=0%),early pericardial effusion(2%vs 6%;RR=0.31,95%CI:0.14-0.68,P=0.004;I^(2)=96%),and late pericardial effusion(1%vs 9%;RR=0.11,95%CI:0.05-0.21,P<0.00001;I^(2)=0%).Hospital stay decreased(mean difference=-1.23 days,95%CI:-1.87 to-0.59,P=0.0002;I^(2)=85%).Pleural effusion risk increased(25%vs 17%;RR=1.46,95%CI:1.21-1.76,P<0.0001;I^(2)=0%).No significant effects on mortality(RR=0.92,95%CI:0.48-1.76,P=0.80;I^(2)=0%),intensive care unit stay,or bleeding revisions.CONCLUSION PP effectively reduces POAF,pericardial effusions,tamponade,and hospital stay in CABG patients,though it increases pleural effusion risk and shows heterogeneity in some outcomes. 展开更多
关键词 Posterior pericardiotomy Coronary artery bypass grafting Safety Postoperative complications Pleural effusion Atrial fibrillation Pericardial effusion
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Flavor improvement in melon:A metabolomic study of grafting with wild melon and hybrid pumpkin rootstocks
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作者 Jianguo Wang Muhammad Mohsin Kaleem +10 位作者 Hao Zhang Banlv Tian Yuchen Wang Bin Liu Qibao Yang Yanmei Lai Jihao Chen Bo Zhou Zhilong Bie Xuejun Zhang Yuan Huang 《Horticultural Plant Journal》 2025年第4期1707-1710,共4页
Melon(Cucumis melo L.)is a globally important fruit crop appreciated for its sweet taste,unique aroma,and nutritional value(Kaleem et al.,2024).Aroma,shaped by volatile organic compounds(VOCs),is a key trait influenci... Melon(Cucumis melo L.)is a globally important fruit crop appreciated for its sweet taste,unique aroma,and nutritional value(Kaleem et al.,2024).Aroma,shaped by volatile organic compounds(VOCs),is a key trait influencing consumer preference.These VOCs are mainly derived from amino acids,fatty acids,and terpenoid pathways(Chen et al.,2023).Esters contribute to fruity and sweet notes,whereas terpenes and C_(9) aldehydes/alcohols impart floral and melon-like aromas,respectively(Mayobre et al.,2024). 展开更多
关键词 flavor improvement Cucumis melo L metabolomic study grafting wild melon volatile organic compounds vocs terpenoid pathways chen amino acidsfatty acidsand
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Fractional flow reserve guided percutaneous coronary intervention vs coronary artery bypass grafting for multivessel coronary artery disease:A meta-analysis
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作者 Suhas Kataveni Ezza Ellahi +12 位作者 Fabeha Zafar Ihsan Noushad Karuppan Veettil Amna Iqbal Bhavya Dhir Shivani Sabarish Sai Erambalur Meenakshi Reddy Yathindra Moukthika Kvn Shayan Nawaz Satish Kumar Dudekula Usman Ul Haq Asraf Hussain Muhammad Muneeb Khawar 《World Journal of Cardiology》 2025年第9期110-119,共10页
BACKGROUND Coronary artery bypass grafting(CABG)and percutaneous coronary intervention(PCI)are well-established treatments for multivessel coronary artery disease(CAD),a condition where multiple heart arteries are nar... BACKGROUND Coronary artery bypass grafting(CABG)and percutaneous coronary intervention(PCI)are well-established treatments for multivessel coronary artery disease(CAD),a condition where multiple heart arteries are narrowed.A newer approach,fractional flow reserve(FFR)-guided PCI,uses a specialized measurement to select which artery blockages to treat,aiming to enhance patient outcomes.Despite its adoption,the comparative effectiveness of FFR-guided PCI vs CABG remains unclear,particularly regarding key health outcomes such as survival,heart-related complications,and the need for further procedures.AIM To evaluate the safety and effectiveness of FFR-guided PCI compared to CABG in patients with multivessel CAD.METHODS This meta-analysis followed standard reporting guidelines and included randomized controlled trials(RCTs)comparing FFR-guided PCI with CABG in patients with multivessel CAD.We searched medical databases,including PubMed,EMBASE,ScienceDirect,and ClinicalTrials.gov,from their start to May 2025.We calculated combined risk ratios(RRs)with 95%confidence intervals(95%CIs)to analyze the data.RESULTS Three RCTs were analyzed.There was no notable difference in all-cause mortality between FFR-guided PCI and CABG(RR=1.01,95%CI:0.78-1.31,P=0.93).However,FFR-guided PCI showed higher rates of major adverse cardiac events(MACEs;RR=1.30,95%CI:1.11-1.52,P=0.001),myocardial infarction(RR=1.49,95%CI:1.11-2.01,P=0.009),and repeat revascularization(RR=2.25,95%CI:1.78-2.85,P<0.00001).Stroke rates were comparable between the two treatments(RR=0.80,95%CI:0.54-1.20,P=0.28).CONCLUSION FFR-guided PCI and CABG have similar rates of all-cause mortality and stroke in patients with multivessel CAD.However,CABG results in fewer MACEs,myocardial infarctions,and repeat procedures. 展开更多
关键词 Percutaneous coronary intervention Coronary artery bypass grafting Fractional flow reserve Multivessel coronary artery disease META-ANALYSIS
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Interpreting fractional flow reserve-guided percutaneous coronary intervention vs coronary artery bypass grafting outcomes
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作者 Heng-Rui Liu Jie-Ling Weng 《World Journal of Cardiology》 2025年第11期161-163,共3页
Kataveni et al’s meta-analysis offers an important contemporary synthesis of randomized evidence comparing fractional flow reserve-guided percutaneous coronary intervention and coronary artery bypass grafting(CABG)in... Kataveni et al’s meta-analysis offers an important contemporary synthesis of randomized evidence comparing fractional flow reserve-guided percutaneous coronary intervention and coronary artery bypass grafting(CABG)in multivessel coronary artery disease(CAD).The pooled analysis found no significant difference in all-cause mortality or stroke,yet CABG was superior in reducing myocardial infarction,major adverse cardiac events,and repeat revascularization.These results confirm CABG’s durability even in the era of physiological lesion assessment and second-generation drug-eluting stents.From a traditional Chinese medicine(TCM)perspective,multivessel CAD corresponds to syndromes such as“heart vessel obstruction”and“Qi and blood stagnation”,in which local blockage is compounded by systemic imbalance.While revascularization addresses the structural impediment to blood flow,TCM approaches,including herbal medicine,acupuncture,and lifestyle therapy,aim to improve microcirculation,reduce inflammation,and support recovery,potentially mitigating recurrent ischemic events.This commentary argues that future research should integrate optimal revascularization strategies with rigorously evaluated TCM interventions to address both the anatomical and systemic dimensions of CAD and improve long-term patient outcomes. 展开更多
关键词 Fractional flow reserve Percutaneous coronary intervention Coronary artery bypass grafting Traditional Chinese medicine Integrative cardiology
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Experiment on Grafting of Virus-Free Citrus reticulata Hongmeiren onto Different Rootstocks
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作者 Congling FANG Chunmiao MAO +2 位作者 Qunchao SHEN Shuyi ZHOU Liru WANG 《Asian Agricultural Research》 2025年第1期29-30,34,共3页
[Objectives]To select the virus-free Citrus reticulata Hongmeiren as test material to select rootstocks suitable for local cultivation,and to carry out demonstration and popularization of suitable rootstocks for plant... [Objectives]To select the virus-free Citrus reticulata Hongmeiren as test material to select rootstocks suitable for local cultivation,and to carry out demonstration and popularization of suitable rootstocks for planting C.reticulata Hongmeiren in the south bank of Hangzhou Bay.[Methods]The effects of different rootstocks on the survival rate,biological characteristics and fruit quality were analyzed by grafting onto three kinds of rootstocks,namely,C.unshiu Marc.cv.Owari,S.mandarin cv.Miyagawa wase and C.trifoliata L.[Results]The grafting survival rate for C.trifoliata L.was the highest;from the index of scion growth,the scion diameter,new shoot length,new shoot thickness and leaf area of C.unshiu Marc.cv.Owari were the largest,and the tree height of S.mandarin cv.Miyagawa wase was the highest;from the fruit quality index,the fruit quality of C.unshiu Marc.cv.Owari was the best.[Conclusions]C.unshiu Marc.cv.Owari is suitable as the preferred rootstock for virus-free C.reticulata Hongmeiren on the south bank of Hangzhou Bay,and can be demonstrated and promoted. 展开更多
关键词 ROOTSTOCK Virus-free Citrus reticulata Hongmeiren grafting
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Effects of two modification methods on the mechanical properties of wood flour/recycled plastic blends composites: addition of thermoplastic elastomer SEBS-g-MAH and in-situ grafting MAH 被引量:2
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作者 宋永明 王清文 +2 位作者 韩广平 王海刚 高华 《Journal of Forestry Research》 SCIE CAS CSCD 2010年第3期373-378,399,400,共8页
The effect of maleic anhydride grafted styrene-ethylene- buty-lene-styrene block copolymer (SEBS-g-MAH) and in-situ grafting MAH on mechanical, dynamic mechanical properties of wood flour/recycled plastic blends com... The effect of maleic anhydride grafted styrene-ethylene- buty-lene-styrene block copolymer (SEBS-g-MAH) and in-situ grafting MAH on mechanical, dynamic mechanical properties of wood flour/recycled plastic blends composites was investigated. Recycled plastic polypro-pylene (PP), high-density polyethylene (HDPE) and polystyrene (PS), were mixed with wood flour in a high speed blender and then extruded by a twin/single screw tandem extruder system to form wood flour/recycled plastic blends composites. Results show that the impact properties of the composites were improved more significantly by using SEBS-g-MAH compatibilizer than by using the mixtures of MAH and DCP via reactive blending in situ. However, contrary results were ob-served on the tensile and flexural properties of the corresponding com-posites. In General, the mechanical properties of composites made from recycled plastic blends were inferior to those made from virgin plastic blends, especially in elongation break. The morphological study verified that the interfacial adhesion or the compatibility of plastic blends with wood flour was improved by adding SEBS-g-MAH or in-situ grafting MAH. A better interfacial bonding between PP, HDPE, PS and wood flour was obtained by in-situ grafting MAH than the addition of SEBS-g-MAH. In-situ grafting MAH can be considered as a potential way of increasing the interfacial compatibility between plastic blends and wood flour. The storage modulus and damping factor of composites were also characterized through dynamic mechanical analysis (DMA). 展开更多
关键词 COMPATIBILIZER COMPOSITES in-situ grafting recycled plastic blends wood flour
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Enhance of Grafting Reaction of Acrylic Acid and Acrylamide onto Preirradiated Polypropylene Film 被引量:1
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作者 杨黎明 陈捷 +2 位作者 吴明红 刘昊晟 吕霞娟 《Advances in Manufacturing》 SCIE CAS 2000年第S1期189-192,共4页
Grafting of acrylic acid (AAc) and acrylamide (AAm) onto preirradiated PP film was performed in aqueous solution of AAc and AAm, respectively. Electron beam accelerator was used as irradiation source. The effect of f... Grafting of acrylic acid (AAc) and acrylamide (AAm) onto preirradiated PP film was performed in aqueous solution of AAc and AAm, respectively. Electron beam accelerator was used as irradiation source. The effect of ferrous sulfate, sodium nitrate, methanol and glucose on the degree of grafting was demonstrated. The function of the different additives was compared by the grafting of different monomers (AAc and AAm). The results show that the four of these additives are elective on the grafting of AAc. Only two of these additives, ferrous sulfate and methanol were effective on the grafting of AAm. 展开更多
关键词 Radiation grafting POLYPROPYLENE acrylic acid ACRYLAMIDE
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Walnut Tree Grafting Experiments in Different Areas in Yunnan Province 被引量:1
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作者 赵廷松 范志远 +8 位作者 谭凤琼 王洪艳 潘莉 邹伟烈 杜春花 刘娇 曾清贤 饶绍松 王斌 《Agricultural Science & Technology》 CAS 2017年第4期704-706,共3页
Yunnan has an area of 2.88 million hm2 walnut trees. Due to freezing in- jury and rapid growth, however, there are a lot of iron walnuts or inferior-quality walnuts ready for grafting. In five years, we conducted expe... Yunnan has an area of 2.88 million hm2 walnut trees. Due to freezing in- jury and rapid growth, however, there are a lot of iron walnuts or inferior-quality walnuts ready for grafting. In five years, we conducted experiments in Kunming (Yunnan Academy of Forestry), Gongshan County, Gucheng City, Luliang County, and Ludian County by cleft grafting, veneer grafting, bark grafting and whip grafting. The grafting approaches should be selected according to grafting requirements, characteristics, and survival rate. For example, with a low survival rate, cleft grafting can be abandoned, and the rest approaches might be chosen as per practical demands. 展开更多
关键词 YUNNAN Different areas Walnut trees grafting experiment
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Study on Improvement of Walnut Bud Grafting Technology in the North 被引量:1
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作者 孙阳 《Agricultural Science & Technology》 CAS 2016年第5期1214-1216,共3页
[Objective] This study was conducted to change the situation of high cost in walnut grafting by reducing seedling cost through technical means.[Method] Effects of different rootstock processing methods and rootstock p... [Objective] This study was conducted to change the situation of high cost in walnut grafting by reducing seedling cost through technical means.[Method] Effects of different rootstock processing methods and rootstock pruning time on walnut growth and cost were studied by the square bud grafting method.[Result] The survival rate and cost under stumping were higher than those under no stumping,and the proportion of grafting-capable rootstocks under stumping was lower than that under no stumping by 9%.The cost differences between different rootstock time were remarkable.The cost for the stock pruning 15 d after grafting was 5 times as much as 1 d after grafting.[Conclusion] Direct grafting could achieve the effect of easy and convenient management,and the overall cost was lower though the survival rate was reduced to a limited extent.Sooner rootstock pruning resulted in a better effect.Pruning the rootstocks within 5 d after grafting not only could improve the quality of seedlings,but also could reduce the cost for seedling management. 展开更多
关键词 WALNUT Bud grafting Survival rate GROWTH COST
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Grafting Branch Length and Density Dependent Performance of Zwitterionic Polymer Decorated Polypropylene Membrane 被引量:1
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作者 Jing-Jing Wu Jin Zhou +4 位作者 Jing-Qiu Rong Yao Lu Hui Dong Hai-Yin Yu Jia-Shan Gu 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2018年第4期528-535,共8页
Branch length and density have critical effects on membrane performances; however, it is regarded to be traditionally difficult to investigate the relationship due to the uncontrolled membrane modification methods. In... Branch length and density have critical effects on membrane performances; however, it is regarded to be traditionally difficult to investigate the relationship due to the uncontrolled membrane modification methods. In this study, zwitterionic polymer with controlled grafting branch chain length(degree of polymerization) and grafting density(grafting chains per membrane area) was tethered to the microporous polypropylene membrane surface based on the combination of reversible addition-fragmentation chain transfer(RAFT) polymerization technique with click reaction. The modified membranes were tested by filtrating protein dispersion to highlight the correlations of branch chain length and grafting density with the membrane permeation performances. The pure water flux, the flux recovery ratio are positively and significantly, and the irreversible fouling negatively and significantly correlated with grafting density. These results demonstrate that the larger the coverage of the membrane with poly{[2-(methacryloyloxy)ethyl]-dimethyl-(3-sulfopropyl) ammonium hydroxide}(PMEDSAH), the higher the pure water flux and the higher the flux recover ratio, and the lower the irreversible fouling, which shows that high grafting density is favorable to fouling reducing. 展开更多
关键词 grafting branch length grafting density Polypropylene membrane Protein fouling Zwitterionic polymer
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Physical Insight for Grafting Polymer Chains onto the Substrate via Computer Simulations:Kinetics and Property 被引量:1
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作者 Chi-Xin Liang Hui Lu +3 位作者 Bai-Ying Huang Ji-Yuan Xing Feng-Long Gu Hong Liu 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第7期817-833,共17页
Molecules adsorbed or attached on a surface is a quite basic phenomenon in numerous chemical or biological systems.Grafting-onto is considered as a feasible way to achieve it.The grafting reaction is essentially contr... Molecules adsorbed or attached on a surface is a quite basic phenomenon in numerous chemical or biological systems.Grafting-onto is considered as a feasible way to achieve it.The grafting reaction is essentially controlled by the diffusion of the molecules,thus it is more likely a physical issue,instead of a chemical issue.Because of the experimental difficulty in measuring the properties of surface-attached molecules(e.g.,the polymeric molecules),the surface-bound molecules are often assumed as with the same properties as that of the start feeding ones in solution.This assumption was even used to guide further characterization,while it is proved to be invalid by different quantifying methods.Consequently,an effective prediction for the properties of surface-bound molecules is still lacking.Based on a microscopic level and a dynamic perspective,the grafting process onto a flat substrate with polydisperse feeding polymeric molecules is investigated in-depth by coarse-grained Brownian dynamics simulation as well as model analysis.We find from simulations that for the final grafting densityσ_(g)and the mean chain length of start feeding molecules<N_(0)>,the dependence ofσ_(g)-<N_(0)>^(γ)with the constant exponential factorγmay be a determined rule for one-end functionalized flexible linear polymer chains grafting on the flat substrate.Since grafting-onto is a multiple interplayed process,our simulation study indicates that there is an optimized initial concentration of start feeding molecules for achieving high grafting density of surface-bound polymers.We also propose a correctional equation to quantitatively predict the molecular weight distribution(MWD)of surface-bound polymeric molecules,which may be effective for predicting the MWD of the surface-bound ones in specific conditions.This simulation study helps to better understand the kinetics of grafting-onto process,and serves as a theoretical guide to achieve the precise design of surface modification materials via grafting-onto strategy. 展开更多
关键词 grafting-onto grafting density POLYDISPERSE Molecular weight distribution
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Research on Crown Grafting of Seedling Cashew Trees
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作者 黄海杰 赵丽 +2 位作者 张中润 王金辉 黄伟坚 《Agricultural Science & Technology》 CAS 2016年第12期2823-2825,共3页
Objective] The study was aimed to improve the yield and quality of cashew. [Method] Through the comparative analysis, the survival rate, new germi-nation and yield characteristics of the cutting stems with different h... Objective] The study was aimed to improve the yield and quality of cashew. [Method] Through the comparative analysis, the survival rate, new germi-nation and yield characteristics of the cutting stems with different heights by stem grafting and bark grafting. [Result] The best cutting stem height of cashew should be in 100-150 cm, when the number of new germinated shoots was 85.5-87.7. Stem grafting could significantly improve the survival rate of the shooting branch (92.7%), growth condition of which was better than that of bark grafting, and it also had no clip cortex. The yield of stem grafting was significantly higher than that of bark grafting, and it could reach up to 18.1 kg/plant in 4 years. The branches from stem grafting had significantly better ability in resisting the wind damage than those from bark grafting. [Conclusion] The study provided references for the crown grafting of cashew planting in China. 展开更多
关键词 CASHEW Seedling tree Crown grafting
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Grafting Techniques of Sophora japonica f. flavi-rameus and Its Application in Gardens
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作者 韩亚利 《Journal of Landscape Research》 2011年第3期29-31,55,共4页
The method of cultivating seedlings of Sophora japonica f.flavi-rameus on rootstocks of Sophora japonica Linn.was introduced in this study,including rootstock cultivation,grafting and post-grafting management,specific... The method of cultivating seedlings of Sophora japonica f.flavi-rameus on rootstocks of Sophora japonica Linn.was introduced in this study,including rootstock cultivation,grafting and post-grafting management,specifically,seed collection,sowing,and breeding large seedlings in the cultivation of rootstocks;grafting time,scion collection and treatment,rootstock treatment,as well as techniques of stump grafting and bud grafting;focuses of post-grafting management,such as checking the survival conditions and untying the film,bud picking,pinching,topiary work,moisture and fertilization management,disease and pest control.Then the application of Sophora japonica f.flavi-rameus in gardens was analyzed,and it was proposed that biological characteristics and aesthetic principles should be followed,proper planting patterns should be applied,such as isolated planting,group planting,mass planting,linear planting and so on,moreover,it could also be combined with other species to create outstanding landscape effects. 展开更多
关键词 SOPHORA japonica f.flavi-rameus SCION grafting Bud grafting GARDENING APPLICATION
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Antimicrobial Expanded Polytetrafluoroethylene Film Prepared by 3-ray Radiation Induced Grafting of Poly(acrylic acid) 被引量:4
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作者 王运龙 汪谟贞 +2 位作者 吴启超 周晓 葛学武 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第1期107-112,I0002,共7页
The simultaneous γ-ray-radiation-induced grafting polymerization of acrylic acid on ex- panded polytetrafluoroethylene (ePTFE) film was investigated. It was found that the degree of grafting (DG) of poly(acrylic... The simultaneous γ-ray-radiation-induced grafting polymerization of acrylic acid on ex- panded polytetrafluoroethylene (ePTFE) film was investigated. It was found that the degree of grafting (DG) of poly(acrylic acid) (PAA) can be controlled by the monomer concentration, absorbed dose, and dose rate under an optimal inhibitor concentration of [Fe2+]=18 mmol/L. SEM observation showed that the macroporous structure in ePTFE films would be covered gradually with the increase of the DG of PAA. The prepared ePTFE-g-PAA film was im- mersed in a neutral silver nitrate solution to fabricate an ePTFE-g-PAA/Ag hybrid film after the addition of NaBH4 as a reduction agent of Ag+ to Ag atom. SEM, XRD, and XPS results proved that Ag nanoparticles with a size of several tens of nanometers to 100 nanometers were in situ immobilized on ePTFE film. The loading capacity of Ag nanoparticles could be tuned by the DG of PAA, and determined by thermal gravimetric analysis. The quart- titative antibacterial activity of the obtained ePTFE-g-PAA/Ag hybrid films was measured using counting plate method. It can kill all the Escherichia coli in the suspension in 1 h. Moreover, this excellent antibacterial activity can last at least for 4 h. This work provides a facile and practical way to make ePTFE meet the demanding antimicrobial requirement in more and more practical application areas. 展开更多
关键词 Expanded polytetrafluoroethylene film Radiation grafting Poly(acrylic acid) Silver nanoparticles Antibacterial property
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“Grafting from”法制备高载量大孔弱阳离子交换层析介质 被引量:2
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作者 郭旺 姜泽平 +6 位作者 马磊 乔娟 莫文清 靳海波 何广湘 黄永东 张荣月 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2024年第3期64-72,共9页
针对大孔聚合物层析介质孔径大、比表面积低而导致的蛋白结合容量低的问题,采用“graftingfrom”策略,以大孔聚丙烯酸酯微球为基质,通过氧化还原引发甲基丙烯酸在微球表面接枝聚合,制备了高载量弱阳离子交换层析介质.研究了单体浓度、... 针对大孔聚合物层析介质孔径大、比表面积低而导致的蛋白结合容量低的问题,采用“graftingfrom”策略,以大孔聚丙烯酸酯微球为基质,通过氧化还原引发甲基丙烯酸在微球表面接枝聚合,制备了高载量弱阳离子交换层析介质.研究了单体浓度、过硫酸钾浓度及反应温度等因素对蛋白结合容量的影响.所得介质的蛋白静态结合容量和动态结合容量分别达到252.21和157.25mg/mL;同时发现具有一定离子交换容量的该类介质能够在0.2 mol/L NaCl缓冲液中保持100 mg/mL的蛋白结合容量.将该层析介质用于鸡卵清中溶菌酶的纯化,获得了较高的纯化效率. 展开更多
关键词 弱阳离子交换层析介质 大孔聚合物 蛋白结合容量 grafting from法 分离纯化
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Grafting and Seedling Cultivation Technology of Cherry Tomato for Disease Prevention in Hainan
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作者 Ziji LIU Weixia LIU +1 位作者 Yuling QIN Yan YANG 《Plant Diseases and Pests》 CAS 2022年第3期29-30,共2页
In order to reduce the occurrence of soil-borne diseases,such as tomato bacterial wilt and Fusarium wilt,and to improve the yield of cherry tomato in Hainan,the paper had summarized grafting and seedling technology of... In order to reduce the occurrence of soil-borne diseases,such as tomato bacterial wilt and Fusarium wilt,and to improve the yield of cherry tomato in Hainan,the paper had summarized grafting and seedling technology of cherry tomato from the aspects of rootstock selection,rootstock seedling cultivation,scion seedling cultivation,preparation before grafting,grafting method and seedling management after grafting.It was found that the technique could significantly improve the yield and disease resistance of cherry tomato. 展开更多
关键词 Cherry tomato Casing grafting grafting and seedling cultivation
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Amidoxime-based adsorbents prepared by cografting acrylic acid with acrylonitrile onto HDPE fiber for the recovery of uranium from seawater 被引量:8
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作者 Lu Xu Jiang-Tao Hu +7 位作者 Hong-Juan Ma Chang-Jian Ling Mou-Hua Wang Rong-Fang Shen Xiao-Jing Guo Yin-Ning Wang Jing-Ye Li Guo-Zhong Wu 《Nuclear Science and Techniques》 SCIE CAS CSCD 2017年第4期13-18,共6页
An amidoxime-based polymeric adsorbent was prepared by pre-irradiation grafting of acrylonitrile and acrylic acid onto high-density polyethylene fibers using electron beams,followed by amidoximation.Quantitative recov... An amidoxime-based polymeric adsorbent was prepared by pre-irradiation grafting of acrylonitrile and acrylic acid onto high-density polyethylene fibers using electron beams,followed by amidoximation.Quantitative recovery of uranium was investigated by flow-through experiment using simulated seawater and marine test in natural seawater.The maximum amount of uranium uptake was 2.51 mg/g-ads after 42 days of contact with simulated seawater and 0.13 mg/g-ads for 15 days of contact with natural seawater.A lower uranium uptake in marine test can be attributed to the short adsorption time and the contamination of marine microorganisms and iron.However,the high selectivity toward uranium against vanadium may be beneficial to harvest uranyl ion onto adsorbents and the economic feasibility for recovery of uranium from seawater. 展开更多
关键词 RADIATION-INDUCED grafting AMIDOXIME ACRYLONITRILE URANIUM Selectivity
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Sevoflurane Versus Propofol for Myocardial Protection in Patients Undergoing Coronary Artery Bypass Grafting Surgery: a Meta-analysis of Randomized Controlled Trials 被引量:11
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作者 Yun-tai Yao Li-huan Li 《Chinese Medical Sciences Journal》 CAS CSCD 2009年第3期133-141,共9页
Objective To systematically review randomized controlled trials to compare myocardial protection profiles of sevoflurane with propofol in patients undergoing coronary artery bypass grafting (CABG) surgery. Methods ... Objective To systematically review randomized controlled trials to compare myocardial protection profiles of sevoflurane with propofol in patients undergoing coronary artery bypass grafting (CABG) surgery. Methods Electronic databases were searched to identify all randomized controlled trials comparing sevoflurane with propofol for protecting myocardium in adult patients undergoing CABG surgery. Two authors independently extracted patients' perioperative data, including patients' baseline characteristics, surgical variables, and outcome data. For continuous variables, treatment effects were calculated as weighted mean difference (WMD) and 95% confidential interval (C/). For dichotomous data, treatment effects were calculated as odds ratio (OR) and 95% CI. Each outcome was tested for heterogeneity, and randomized-effects or fixed-effects model was used in the presence or absence of significant heterogeneity (Q test P〈0.05). Sensitivity analyses were done by examining the influence of statistical model on estimated treatment effects. Publication bias was explored through visual inspection of funnel plots of the outcomes. Statistical significance was defined as P〈0.05. Results Our search yielded 13 studies including 696 patients, and 402 patients were allocated into sevoflurane group and 294 into propofol group. There was no significant difference in postoperative mechanical ventilation time, inotropic support, mortality, myocardial infarction, and atrial fibrillation between the two groups (all P〉0.05). Patients randomized into sevoflurane group had higher post-bypass cardiac index (WMD=0.39, 95% CI: 0.18 to 0.60, P=0.0003), lower troponin I level (WMD=-0.82, 95% CI:-0.87 to -0.85, P=0.0002), lower incidence of myocardial ischemia (OR=0.37, 95% CI: 0.16 to 0.83, P=0.02), shorter ICU and hospital stay length (WMD=-10.99, 95% CI: -12.97 to -9.01, P〈0.00001; WMD=-0.78, 95% CI: -1.00 to -0.56, P〈0.00001, respectively). Conclusion This meta-analysis has found some evidence showing that sevoflurane has better myocardial protection than propofol in CABG surgery. 展开更多
关键词 SEVOFLURANE PROPOFOL myocardial protection coronary artery bypass grafting META-ANALYSIS
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Treatment of Thoracolumbar Vertebrate Fracture by Transpedicular Morselized Bone Grafting in Vertebrae for Spinal Fusion and Pedicle Screw Fixation 被引量:16
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作者 王金国 吴华 +1 位作者 丁晓琳 刘玉田 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2008年第3期322-326,共5页
To enhance the fusion of graft bone in thoracolumbar vertebrae and minimize the postoperative loss of correction, short-segment pedicle screw fixation was reinforced with posterior moselizee bone grafting in vertebrae... To enhance the fusion of graft bone in thoracolumbar vertebrae and minimize the postoperative loss of correction, short-segment pedicle screw fixation was reinforced with posterior moselizee bone grafting in vertebrae for spinal fusion in patients with thoracrolumbar vertebrate fractures. Seventy patients with thoracrolumbar vertebrate fractures were treated by short-segment pedicle screw fixation and were randomly divided into two groups. Fractures in group A (n=20) were rein-forced with posterior morselized bone grafting in vertebrae for spinal fusion, while patients group B (n=50) did not receive the morselized bone grafting for bone fusion. The two groups were compared in terms of kyphotic deformity, anterior vertebral height, instrument failure and neurological functions after the treatment. Frankel grading system was used for the evaluation of neurological evaluation and Denis scoring scale was employed for pain assessment. The results showed that the kyphosis correction was achieved in both group A and group B (group A: 6.4 degree; group B: 5.4 degree)/At the end of follow-up, kyphosis correction was maintained in group A but lost in group B (P=0.0001). Postoperatively, greater anterior height was achieved in group A than in group B (P〈0.01). During follow-up study, anterior vertebral height was maintained only in Group A (P〈0.001). Both group A and group B showed good Denis pain scores (P1 and P2) but group A outdid group B in terms of control of severe and constant pain (P4 and P5). By Frankel criteria, the changes in neurological functions in group A was better than those of group B (P〈0.001). It is concluded that reinforcement of short-segment pedicle fixation with morselized bone grafting for the treatment of patients with thoracolumbar vertebrae fracture could achieve and maintain kyphosis correction, and it may also increase and maintain anterior vertebral height. Morselized bone grafting in vertebrae offers immediate spinal stability in patients with thoracolumbar vertebrate fractures, decreases the instrument failure and provides better postoperative pain control than without the morselized bone grafting. 展开更多
关键词 thoracolumbar vertebrae fracture kyphotic deformity pedicle screw morselized bone grafting in vertebrae
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