In this study,reclaimed asphalt pavement(RAP)used in different percentages in hot mix asphalt(HMA)and warm mix asphalt(WMA)were tested for moisture,fracture and rutting resistance adding hydrogenated castor oil flakes...In this study,reclaimed asphalt pavement(RAP)used in different percentages in hot mix asphalt(HMA)and warm mix asphalt(WMA)were tested for moisture,fracture and rutting resistance adding hydrogenated castor oil flakes(HCOF)as rejuvenating agent.Volumetric and Marshall parameters were evaluated for both types of mixtures.Addition of 5%of HCOF by weight of binder content in RAP found to restore properties of aged binder.WMA mix was made by adding 0.1%Zycotherm by weight of optimum binder content.Moisture,rutting and fracture damage performance were assessed utilizing indirect tensile strength,wheel tracking and semi-circular bending tests.The mix's tensile strength ratio increased by 2.3%in the HMA with RAP(HMA-R)mix compared to the WMA with RAP(WMA-R)mix at 10%RAP content.HMA mixes provide better resistance to rutting compared to WMA.However,40%of RAP content HMA-R and WMA-R using HCOF rejuvenator shows greater rutting performance compared to other RAP mix.HMA-R mix fracture resistance increased by 18.14%compared to WMA-R mix when RAP content increases to 40%.Regression analyses were carried out to validate the strain energy found from fracture damage analysis of both HMA-R and WMA-R with R2 value more than 0.9.HMA-R protected moisture and fracture damage better than WMA-R.The rejuvenating efficiency of HCOF was further validated using Fourier transform infrared and microscopic analysis.展开更多
背景与目的:胸主动脉腔内修复术(TEVAR)已成为治疗主动脉弓病变的首选方法。如何重建主动脉弓上分支,是TEVAR的难点和研究方向之一。目前,Castor单分支主动脉覆膜支架广泛应用于TEVAR术中重建左锁骨下动脉,但其应用于重建左颈总动脉(LC...背景与目的:胸主动脉腔内修复术(TEVAR)已成为治疗主动脉弓病变的首选方法。如何重建主动脉弓上分支,是TEVAR的难点和研究方向之一。目前,Castor单分支主动脉覆膜支架广泛应用于TEVAR术中重建左锁骨下动脉,但其应用于重建左颈总动脉(LCCA)报道少见。因此,本研究探讨TEVAR术中运用Castor单分支主动脉覆膜支架在TEVAR术中重建LCCA的可行性和有效性。方法:回顾2021年10月—2022年9月潍坊市人民医院血管外科收治的5例累及Z2区的主动脉弓病变患者资料,患者均为男性;年龄39~77岁,平均(59.2±14.08)岁,其中急性Stanford B型主动脉夹层3例,主动脉弓动脉瘤2例。所有患者均在数字减影血管造影引导下采用Castor一体化分支型主动脉覆膜支架在TEVAR术中重建LCCA。分析手术相关指标及术后不良事件发生率,以及术后随访6个月内不良事件的发生情况与主动脉重塑情况。结果:5例患者均手术成功。手术时间168~233 min,平均(191±19.06)min,无中转开胸手术。5例患者的LCCA均成功采用Castor单分支支架行血运重建。术后住院期间发生1例脑卒中,术后2个月意识清晰,右上肢肌力完全恢复(Ⅴ级);其余4例患者住院及随访期间无全因死亡、脑卒中、支架移位、夹层复发、内漏、截瘫、左上肢缺血等并发症。患者术后6个月复查主动脉CT血管造影显示Castor单分支支架位置良好,主动脉峡部平面主动脉平均直径与肺动脉分叉平面主动脉平均直径均较术前明显减小(35.8 mm vs.41.9 mm,P=0.035;31.1 mm vs.36.7 mm,P=0.048);主动脉及分支支架通畅率为100%,无内漏,瘤腔/假腔均出现血栓化。结论:在严格把握适应证的前提下,Castor单分支支架在TEVAR术中重建LCCA安全可行,然而,其疗效仍需更长时间的随访和更多的病例验证。展开更多
In this study, a homogeneous alkaline catalyst was used in the production of biodiesel from raw and refined castor oil feedstock. The effect of potassium hydroxide (KOH) as a catalyst between the two feedstocks, raw a...In this study, a homogeneous alkaline catalyst was used in the production of biodiesel from raw and refined castor oil feedstock. The effect of potassium hydroxide (KOH) as a catalyst between the two feedstocks, raw and refined castor oil was compared. The transesterification technique was utilized in this study, aiming to investigate the effect of different parameters, which include the reaction temperature, methanol-to-oil mole ratio, and catalyst concentration at a constant period of 90 minutes. The result revealed the performance of the KOH catalyst on raw castor oil yielded 98.49% FAME, which was higher than the refined castor oil which yielded 97.9% FAME. The optimal conditions obtained from refined castor oil were applied to raw castor oil because of the same properties. The fuel quality of castor oil and produced biodiesel were tested for physicochemical properties.展开更多
To alleviate the pressure on the petrochemical industry and address environmental concerns,the utilization of polyurethane(PU)derived from castor oil(CO)(as an ester polyol replacement of petrochemicalbased materials)...To alleviate the pressure on the petrochemical industry and address environmental concerns,the utilization of polyurethane(PU)derived from castor oil(CO)(as an ester polyol replacement of petrochemicalbased materials)has garnered significant attention in recent decades.Extending the service life of materials requires imparting self-healing properties to vegetable oil-based polymers,an aspect that has received limited attention in current studies.However,low self-healing efficiency still poses a significant challenge,and non-conductivity also remains an obstacle in current research,crucial for their application in electronic devices.In this work,we present the first series of electrically self-healing biopolymer composites constructed by incorporating carbon nanotube(CNT)networks into crosslinked castor oil-based polyurethane(BPU)through a simple curing process.These materials address the challenges mentioned above and exhibit improved mechanical,electrical,and self-healing capabilities compared to other biobased self-healing materials.The resulting BPU/CNT composite demonstrated exceptional repeated selfhealing capacity,restoring both mechanical properties and electrical performance even after experiencing severe mechanical damage.Notably,this composite served as a conductive substrate in flexible solid-state supercapacitor(FSSC)devices.Consequently,the FSSC derived from the composite conductive substrate achieved an impressive 92.4%self-healing efficiency even after undergoing 7 cutting/healing cycles.The device remained virtually unchanged even after being bent at a 180°angle with a bending radius of 1.6 mm,indicating excellent repeatability and durability.The exceptional self-healing ability,with∼98%electrical recovery at 100℃for 70 s and 93%at 80℃after 6 min,of these composites was attributed to the synergistic interactions of the dynamic exchange reactions of disulfide bonds and dense hydrogen bonds within the BPU matrix,which provide a reversible dynamic polymer network.The healing efficiency of these dynamic bonds was evaluated by adjusting the composition ratio of the long linear chain of pTHF in hybrid polyols of the crosslinked polymer network.Overall,this work highlights a series of green,simple,and highly efficient self-healing polymer composites derived from renewable castor oil,and it establishes an essential framework for future sustainable polymer composite design.展开更多
Over the last decade,the oriented strand board(OSB)market presented meaningful growth.However,as a woodbased product,because of its anatomical structure and chemical composition,OSB can be damaged by biodeterioration ...Over the last decade,the oriented strand board(OSB)market presented meaningful growth.However,as a woodbased product,because of its anatomical structure and chemical composition,OSB can be damaged by biodeterioration agents.Given that,the biodeterioration of OSB panels must be investigated to improve its durability.In this way,this work analyses the biological resistance against termites(Cryptotermes brevis and Nasutitermes corniger)of heat-treated OSB panels made with Eucalyptus wood glued with vegetable-based polyurethane-an ecofriendly and sustainable adhesive derived from castor oil.Various panels were produced with different layers compositions(face:core:face of 25:50:25 and 30:40:30)in wood mass proportion and were submitted to postproduction heat treatment(at 175℃ and 200℃)replacing the use of chemical insecticides.The influence of the layers variation and heat treatment temperature were evaluated,and these results were compared with commercial panels(made from pinus wood with insecticide).The results showed that the heat treatment did not improve the resistance against termite attack.However,all the experimental panels presented a satisfactory performance that was compatible with the commercial panels produced with insecticide available in the Brazilian market.The combination of Eucalyptus wood and castor oil adhesive to produce OSB,in any variation of layer composition,demonstrated natural resistance against termite attack compatible with the commercial panels,even without using chemical additives to increase durability.展开更多
[Objective] In order to explore the mechanism of combined inoculation mi- croorganisms in improving coastal saline soil property and plant growth. [Method] The pot experiment was used to assess the effects of differen...[Objective] In order to explore the mechanism of combined inoculation mi- croorganisms in improving coastal saline soil property and plant growth. [Method] The pot experiment was used to assess the effects of different inoculated proportion of arbuscular mycorrhizal fungi （AMF） and Phosphate-sotubilizing fungus. Apophysomyces spartina, on growth, chlorophyll contents, P-uptake of castor bean （Ricinus communis L.） and rhizosphere soil pH values, available P concentrations, enzyme activities. [Result] The mixed inoculation of AMF and A. spartina significantly reduced soil pH value, increased soil available phosphorous contents, improved the activities of soil invertase, urease, neutral phosphatase, and alkaline phosphatase. Chlorophyll contents, P-uptake, and plant dry weight of castor bean were also in- creased. The optimal proportion of the number of AMF spores to A. spartina colonies was 28.56：11.5×10^5, which had positive effects on saline soil and could stimulate plant growth under greenhouse condition. [Conclusion] Appropriate propor- tion of AMF and A. spartina had the potential to enhance coastal saline soil prop- erty and promote castor bean growth.展开更多
Castor(Ricinus communis L.)is one of the top 10 oil crops in the world,and inflorescence is a trait that directly affects its yield.Phospholipase C(PLCs)is involved in many plant activities and metabolic processes.To ...Castor(Ricinus communis L.)is one of the top 10 oil crops in the world,and inflorescence is a trait that directly affects its yield.Phospholipase C(PLCs)is involved in many plant activities and metabolic processes.To study the functions of PLC family genes in the regulation of the inflorescence development of the female line of Lm-type castor aLmAB2,we determined the expression levels of six PLC family genes of three types of inflorescences of aLmAB2(isofemale line,female line,bisexual line)at different developmental stages.The results showed that the 6 genes of the castor PLC family had relative expression levels at different developmental stages of the three types of inflorescences.The subcellular location of all six protein products was the cell membrane.The six genes were heterologously overexpressed in Arabidopsis thaliana to obtain the T3 generation-resistant Arabidopsis thaliana plants.The results showed that the overexpression of six genes significantly promoted the maturation of Arabidopsis thaliana,the growth of lateral moss,and the development of flowers and pods,but the development of basal leaves and stem leaves of Arabidopsis thaliana was significantly inhibited.According to homology analysis,it is speculated that PLC2,PLC2M,PLC2N,PLC4,PLC4X2,and PLC6 genes have the same regulatory function.展开更多
[Objective] The aim of this study is to reveal the salt resistance of castor. [Method] Under salt stress, the growth, osmotic potential, chlorophyll fluorescence parameters, Na^+ and K^+ uptakes and transports in the ...[Objective] The aim of this study is to reveal the salt resistance of castor. [Method] Under salt stress, the growth, osmotic potential, chlorophyll fluorescence parameters, Na^+ and K^+ uptakes and transports in the seedlings of two Ricinus communis varieties (cultivar castor ‘Zibi 6’ and wild castor which grew naturally in coastal saline-alkali land), were comparatively studied. [Result] Wild castor preformed better in halophilism than that of cultivar castor Zibi 6 under the NaCl treatment. One of the salt tolerant mechanisms of castor is to improve K^+ uptake and transport to overground portion, thus to maintain K^+/Na^+ homeostasis in leaves; on the other hand, the high stability of Photoreaction System Ⅱ (PS Ⅱ) plays a key role in maintaining the leaf photosynthetic rate under salt stress. [Conclusion] The results of this study provided theoretical basis for the extension and application of castor in saline beach.展开更多
文摘In this study,reclaimed asphalt pavement(RAP)used in different percentages in hot mix asphalt(HMA)and warm mix asphalt(WMA)were tested for moisture,fracture and rutting resistance adding hydrogenated castor oil flakes(HCOF)as rejuvenating agent.Volumetric and Marshall parameters were evaluated for both types of mixtures.Addition of 5%of HCOF by weight of binder content in RAP found to restore properties of aged binder.WMA mix was made by adding 0.1%Zycotherm by weight of optimum binder content.Moisture,rutting and fracture damage performance were assessed utilizing indirect tensile strength,wheel tracking and semi-circular bending tests.The mix's tensile strength ratio increased by 2.3%in the HMA with RAP(HMA-R)mix compared to the WMA with RAP(WMA-R)mix at 10%RAP content.HMA mixes provide better resistance to rutting compared to WMA.However,40%of RAP content HMA-R and WMA-R using HCOF rejuvenator shows greater rutting performance compared to other RAP mix.HMA-R mix fracture resistance increased by 18.14%compared to WMA-R mix when RAP content increases to 40%.Regression analyses were carried out to validate the strain energy found from fracture damage analysis of both HMA-R and WMA-R with R2 value more than 0.9.HMA-R protected moisture and fracture damage better than WMA-R.The rejuvenating efficiency of HCOF was further validated using Fourier transform infrared and microscopic analysis.
文摘背景与目的:胸主动脉腔内修复术(TEVAR)已成为治疗主动脉弓病变的首选方法。如何重建主动脉弓上分支,是TEVAR的难点和研究方向之一。目前,Castor单分支主动脉覆膜支架广泛应用于TEVAR术中重建左锁骨下动脉,但其应用于重建左颈总动脉(LCCA)报道少见。因此,本研究探讨TEVAR术中运用Castor单分支主动脉覆膜支架在TEVAR术中重建LCCA的可行性和有效性。方法:回顾2021年10月—2022年9月潍坊市人民医院血管外科收治的5例累及Z2区的主动脉弓病变患者资料,患者均为男性;年龄39~77岁,平均(59.2±14.08)岁,其中急性Stanford B型主动脉夹层3例,主动脉弓动脉瘤2例。所有患者均在数字减影血管造影引导下采用Castor一体化分支型主动脉覆膜支架在TEVAR术中重建LCCA。分析手术相关指标及术后不良事件发生率,以及术后随访6个月内不良事件的发生情况与主动脉重塑情况。结果:5例患者均手术成功。手术时间168~233 min,平均(191±19.06)min,无中转开胸手术。5例患者的LCCA均成功采用Castor单分支支架行血运重建。术后住院期间发生1例脑卒中,术后2个月意识清晰,右上肢肌力完全恢复(Ⅴ级);其余4例患者住院及随访期间无全因死亡、脑卒中、支架移位、夹层复发、内漏、截瘫、左上肢缺血等并发症。患者术后6个月复查主动脉CT血管造影显示Castor单分支支架位置良好,主动脉峡部平面主动脉平均直径与肺动脉分叉平面主动脉平均直径均较术前明显减小(35.8 mm vs.41.9 mm,P=0.035;31.1 mm vs.36.7 mm,P=0.048);主动脉及分支支架通畅率为100%,无内漏,瘤腔/假腔均出现血栓化。结论:在严格把握适应证的前提下,Castor单分支支架在TEVAR术中重建LCCA安全可行,然而,其疗效仍需更长时间的随访和更多的病例验证。
文摘In this study, a homogeneous alkaline catalyst was used in the production of biodiesel from raw and refined castor oil feedstock. The effect of potassium hydroxide (KOH) as a catalyst between the two feedstocks, raw and refined castor oil was compared. The transesterification technique was utilized in this study, aiming to investigate the effect of different parameters, which include the reaction temperature, methanol-to-oil mole ratio, and catalyst concentration at a constant period of 90 minutes. The result revealed the performance of the KOH catalyst on raw castor oil yielded 98.49% FAME, which was higher than the refined castor oil which yielded 97.9% FAME. The optimal conditions obtained from refined castor oil were applied to raw castor oil because of the same properties. The fuel quality of castor oil and produced biodiesel were tested for physicochemical properties.
基金supported by the Commercialization Promotion Agency for R&D Outcomes(COMPA)grant funded by the Korean Government(Ministery of Science and ICT),(No.RS-2023–00304743).
文摘To alleviate the pressure on the petrochemical industry and address environmental concerns,the utilization of polyurethane(PU)derived from castor oil(CO)(as an ester polyol replacement of petrochemicalbased materials)has garnered significant attention in recent decades.Extending the service life of materials requires imparting self-healing properties to vegetable oil-based polymers,an aspect that has received limited attention in current studies.However,low self-healing efficiency still poses a significant challenge,and non-conductivity also remains an obstacle in current research,crucial for their application in electronic devices.In this work,we present the first series of electrically self-healing biopolymer composites constructed by incorporating carbon nanotube(CNT)networks into crosslinked castor oil-based polyurethane(BPU)through a simple curing process.These materials address the challenges mentioned above and exhibit improved mechanical,electrical,and self-healing capabilities compared to other biobased self-healing materials.The resulting BPU/CNT composite demonstrated exceptional repeated selfhealing capacity,restoring both mechanical properties and electrical performance even after experiencing severe mechanical damage.Notably,this composite served as a conductive substrate in flexible solid-state supercapacitor(FSSC)devices.Consequently,the FSSC derived from the composite conductive substrate achieved an impressive 92.4%self-healing efficiency even after undergoing 7 cutting/healing cycles.The device remained virtually unchanged even after being bent at a 180°angle with a bending radius of 1.6 mm,indicating excellent repeatability and durability.The exceptional self-healing ability,with∼98%electrical recovery at 100℃for 70 s and 93%at 80℃after 6 min,of these composites was attributed to the synergistic interactions of the dynamic exchange reactions of disulfide bonds and dense hydrogen bonds within the BPU matrix,which provide a reversible dynamic polymer network.The healing efficiency of these dynamic bonds was evaluated by adjusting the composition ratio of the long linear chain of pTHF in hybrid polyols of the crosslinked polymer network.Overall,this work highlights a series of green,simple,and highly efficient self-healing polymer composites derived from renewable castor oil,and it establishes an essential framework for future sustainable polymer composite design.
基金financed by Coordination for the Improvement of Higher Education Personnel,Brazil(CAPES,https://www.gov.br/capes/pt-br)(accessed on 22 September 2024)Finance Code 001(ESS,FDM)+1 种基金Sao Paulo State Research Support Foundation(FAPESP,https://fapesp.br/)(accessed on 22 September 2024)(CIC,grant number 2015/04660-0)National Council for Scientific and Technological Development(CNPq,https://www.gov.br/cnpq/pt-br)(accessed on 22 September 2024)(grant numbers 308937/2021-0(CIC),306576/2020-1(ECB),and 303099/2022-4(JBP)).
文摘Over the last decade,the oriented strand board(OSB)market presented meaningful growth.However,as a woodbased product,because of its anatomical structure and chemical composition,OSB can be damaged by biodeterioration agents.Given that,the biodeterioration of OSB panels must be investigated to improve its durability.In this way,this work analyses the biological resistance against termites(Cryptotermes brevis and Nasutitermes corniger)of heat-treated OSB panels made with Eucalyptus wood glued with vegetable-based polyurethane-an ecofriendly and sustainable adhesive derived from castor oil.Various panels were produced with different layers compositions(face:core:face of 25:50:25 and 30:40:30)in wood mass proportion and were submitted to postproduction heat treatment(at 175℃ and 200℃)replacing the use of chemical insecticides.The influence of the layers variation and heat treatment temperature were evaluated,and these results were compared with commercial panels(made from pinus wood with insecticide).The results showed that the heat treatment did not improve the resistance against termite attack.However,all the experimental panels presented a satisfactory performance that was compatible with the commercial panels produced with insecticide available in the Brazilian market.The combination of Eucalyptus wood and castor oil adhesive to produce OSB,in any variation of layer composition,demonstrated natural resistance against termite attack compatible with the commercial panels,even without using chemical additives to increase durability.
基金Supported by the China Postdoctoral Science Foundation(2012M511728)~~
文摘[Objective] In order to explore the mechanism of combined inoculation mi- croorganisms in improving coastal saline soil property and plant growth. [Method] The pot experiment was used to assess the effects of different inoculated proportion of arbuscular mycorrhizal fungi （AMF） and Phosphate-sotubilizing fungus. Apophysomyces spartina, on growth, chlorophyll contents, P-uptake of castor bean （Ricinus communis L.） and rhizosphere soil pH values, available P concentrations, enzyme activities. [Result] The mixed inoculation of AMF and A. spartina significantly reduced soil pH value, increased soil available phosphorous contents, improved the activities of soil invertase, urease, neutral phosphatase, and alkaline phosphatase. Chlorophyll contents, P-uptake, and plant dry weight of castor bean were also in- creased. The optimal proportion of the number of AMF spores to A. spartina colonies was 28.56：11.5×10^5, which had positive effects on saline soil and could stimulate plant growth under greenhouse condition. [Conclusion] Appropriate propor- tion of AMF and A. spartina had the potential to enhance coastal saline soil prop- erty and promote castor bean growth.
基金the following agencies:National Natural Science Foundation of China(31860071)New Agricultural Research and Reform Practice Project of the Ministry of Education(2020114)+8 种基金Grassland Talent Innovation Team of Inner Mongolia Autonomous Region-Castor Molecular Breeding Research Innovative Talent Team(2022)Inner Mongolia University for Nationalities 2022 Basic Research Business Funds for Universities Directly under the Autonomous Region(237)the Natural Science Foundation of Inner Mongolia Autonomous Region(2021 MS03008)In 2023,the Department of Science and Technology of Inner Mongolia Autonomous Region Approved the Construction Project of Inner Mongolia Autonomous Region Key Laboratory of Castor Breeding and Comprehensive UtilizationInner Mongolia Autonomous Region Castor Industry Collaborative Innovation Center Open Fund Project(MDK2021011,MDK2022014)the Natural Science Foundation of Inner Mongolia Autonomous Region(2021BS03036)Inner Mongolia University for Nationalities Doctoral Research Start-Up Fund(BS672)Castor Industry Technology Innovation Inner Mongolia Autonomous Region Engineering Research Center Open Project(MDK2021004)Inner Mongolia Autonomous Region Castor Industry Collaborative Innovation Center Open Project(MDK2022016).
文摘Castor(Ricinus communis L.)is one of the top 10 oil crops in the world,and inflorescence is a trait that directly affects its yield.Phospholipase C(PLCs)is involved in many plant activities and metabolic processes.To study the functions of PLC family genes in the regulation of the inflorescence development of the female line of Lm-type castor aLmAB2,we determined the expression levels of six PLC family genes of three types of inflorescences of aLmAB2(isofemale line,female line,bisexual line)at different developmental stages.The results showed that the 6 genes of the castor PLC family had relative expression levels at different developmental stages of the three types of inflorescences.The subcellular location of all six protein products was the cell membrane.The six genes were heterologously overexpressed in Arabidopsis thaliana to obtain the T3 generation-resistant Arabidopsis thaliana plants.The results showed that the overexpression of six genes significantly promoted the maturation of Arabidopsis thaliana,the growth of lateral moss,and the development of flowers and pods,but the development of basal leaves and stem leaves of Arabidopsis thaliana was significantly inhibited.According to homology analysis,it is speculated that PLC2,PLC2M,PLC2N,PLC4,PLC4X2,and PLC6 genes have the same regulatory function.
文摘[Objective] The aim of this study is to reveal the salt resistance of castor. [Method] Under salt stress, the growth, osmotic potential, chlorophyll fluorescence parameters, Na^+ and K^+ uptakes and transports in the seedlings of two Ricinus communis varieties (cultivar castor ‘Zibi 6’ and wild castor which grew naturally in coastal saline-alkali land), were comparatively studied. [Result] Wild castor preformed better in halophilism than that of cultivar castor Zibi 6 under the NaCl treatment. One of the salt tolerant mechanisms of castor is to improve K^+ uptake and transport to overground portion, thus to maintain K^+/Na^+ homeostasis in leaves; on the other hand, the high stability of Photoreaction System Ⅱ (PS Ⅱ) plays a key role in maintaining the leaf photosynthetic rate under salt stress. [Conclusion] The results of this study provided theoretical basis for the extension and application of castor in saline beach.
