In this study, the rubber tree clone PR107 was selected as test material,and its yields and physiological features under micro-tapping with different concentrations of ethylene were compared. The results showed that t...In this study, the rubber tree clone PR107 was selected as test material,and its yields and physiological features under micro-tapping with different concentrations of ethylene were compared. The results showed that there was no significant correlation between rubber yield and ethylene concentration applied by microtapping on PR107. Too high level of ethylene was not conducive to improvement of rubber yield. When the ethylene concentration for micro-tapping was higher than60%, physical deficiencies appeared in rubber tree PR107, the dry rubber content was reduced, and the yield was unstable. Instead, when the ethylene concentration was lower than 40%, the physiological features of PR107 were steady, the dry rubber content was stable, and the yield was relatively high.展开更多
The primary determinant of microfluidic chip performance is the surface quality of the micro-tapered holes.Due to the small scale of these holes and the high hardness of the surface attachments,the commonly used abras...The primary determinant of microfluidic chip performance is the surface quality of the micro-tapered holes.Due to the small scale of these holes and the high hardness of the surface attachments,the commonly used abrasive jet polishing method can encounter difficulties.Therefore,we propose a novel active multiphase field material removal technique.This technique is based on piezoelectric ultrasonically coupled abrasive particle flow.To study the connection between the impulse properties of the flow field and the micro-tapered hole’s asymptotic expansion–contraction process,a multiphase hybrid fluid dynamics model is established.Simultaneously,we investigate the process of abrasive–wall contact during the cycles of expansion and contraction,revealing the effects of erosion and polishing on different areas of the hole surface.To achieve accurate regulation of a desired polishing area,a quantitative relationship between the vibrational properties of piezoelectric ceramics and the erosional effect of micro-tapered holes is established.Finally,an experimental platform for micro-tapered hole polishing is built to validate the method.展开更多
基金Supported by Project of National Natural Rubber Industry Technology System of China(CARS-34-GW7)Project of Agricultural Technology Extension and System Construction for Tropical Crops(13RZNJ-43)Fundamental Research Funds of Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences(1630022013023)~~
文摘In this study, the rubber tree clone PR107 was selected as test material,and its yields and physiological features under micro-tapping with different concentrations of ethylene were compared. The results showed that there was no significant correlation between rubber yield and ethylene concentration applied by microtapping on PR107. Too high level of ethylene was not conducive to improvement of rubber yield. When the ethylene concentration for micro-tapping was higher than60%, physical deficiencies appeared in rubber tree PR107, the dry rubber content was reduced, and the yield was unstable. Instead, when the ethylene concentration was lower than 40%, the physiological features of PR107 were steady, the dry rubber content was stable, and the yield was relatively high.
基金supported by the National Natural Science Foundation of China(Nos.U25A20294,52175124,52575546,and 52305139)the Zhejiang Provincial Natural Science Foundation of China(Nos.LQ23E050017 and LZ21E050003)+1 种基金the Fundamental Research Funds for the Provincial Universities of Zhejiang,China(No.RF-A2024001)the China Postdoctoral Science Foundation(No.2025M771342).
文摘The primary determinant of microfluidic chip performance is the surface quality of the micro-tapered holes.Due to the small scale of these holes and the high hardness of the surface attachments,the commonly used abrasive jet polishing method can encounter difficulties.Therefore,we propose a novel active multiphase field material removal technique.This technique is based on piezoelectric ultrasonically coupled abrasive particle flow.To study the connection between the impulse properties of the flow field and the micro-tapered hole’s asymptotic expansion–contraction process,a multiphase hybrid fluid dynamics model is established.Simultaneously,we investigate the process of abrasive–wall contact during the cycles of expansion and contraction,revealing the effects of erosion and polishing on different areas of the hole surface.To achieve accurate regulation of a desired polishing area,a quantitative relationship between the vibrational properties of piezoelectric ceramics and the erosional effect of micro-tapered holes is established.Finally,an experimental platform for micro-tapered hole polishing is built to validate the method.
