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| 1 | Effects of fan speed on spray deposition and drift for targeting air-assisted sprayer in pear orchard显示文摘In order to reduce the application dosage of pesticides,a targeting air-assisted(TAA)sprayer was developed and tested in this study.Fruit trees were assayed by an infrared detection system to determine if the canopy needs to be sprayed.This TAA sprayer was compared with conventional air-assisted(CAA)sprayers,and the impacts of various fan speeds(0,800 r/min,1300 r/min,and 1800 r/min)on spray deposition,coverage,and drift amount were tested.Ponceau 2R was used as tracer to measure spray deposition under each treatment.Droplet coverage and canopy deposition were best when the CAA application fan speed was increased to 1300 r/min,but at higher fan speeds,spray deposition and coverage in canopy did not increase because extra air flow blew droplets from the ground into the air.During TAA spraying,droplet sizes increased at opening and closing moments.Optimal spray effects were achieved when the auxiliary airflow velocity was increased at a fan speed of 1800 r/min.The research provides a useful reference for the design of TAA and parameters optimization method with respect to the relationship between droplets deposition into tree canopy,ground and drift in the air. | Qiu Wei Zhao Sanqin Ding Weimin Sun Chengda Lu Jiang Li Yinian Gu Jiabing | 2016 | International Journal of Agricultural and Biological Engineering2016，9，4： | 12 |
| 2 | An antiretroviral regimen containing 6 months of stavudine followed by long-term zidovudine for first-fine HIV therapy is optimal in resource-limited settings: a prospective, multicenter study in China显示文摘 | Li Taisheng Guo Fuping Li Yijia Zhang Chengda Han Yang Lye Wei He Yun Lu Hongzhou Xie Jing Huang Aiqiong Li Yanling Tang Xiaoping Wang Hui Zhang Tong Gao Guiju Lei Junkang Zhang Xiaoying Wu Xinhua Sun Yongtao Bai Jinsong Luo Ling Wang Huanlmg | 2014 | Chinese Medical Journal2014，，1： | 6 |
| 3 | A boronic acid conjugation integrates antitumor drugs into albumin-binding prodrugs-based nanoparticles with robust efficiency for cancer therapy显示文摘Despite great therapeutic effect of Abraxane®,complex preparation technology and unfavorable pharmacokinetics still restricted the clinical application of albumin-based paclitaxel(PTX)nanoparticles(NPs).Herein,we reported that an albumin-binding prodrug,phenylboronic acid-conjugated PTX(P-PTX),can form the uniform NPs with the diameters around 100 nm with the help of albumin via simple one-step nano-precipitation method.The albumin-based nanomedicines were stabilized by the integration of a single boronic acid with PTX due to the increased affinity based on multiple intermolecular interactions.We found that albumin-based P-PTX NPs exhibited superior colloidal stability over albumin-based PTX NPs through one-step nanoprecipitation approach,achieving longer in vivo circulation time and higher concentration in tumor than those of the marketed Abraxane®.Furthermore,the albumin-based P-PTX NPs with great stability and enhanced intratumoral enrichment,increased the maximum tolerated dose of PTX,remarkably suppressed the growth of breast tumor and lung metastasis,prolonged survival of melanoma tumors-bearing mice.Such a convenient and effective system gains an insight into the impact of phenylboronic acid group on the albumin-based PTX NPs,provides potent strategy for the rational design of albumin-based antitumor nanomedicines. | Weiyue Ban Qiuhua Luo Chengda Yan Xiaoying Fan Guorui Zhu Maosheng Cheng Zhonggui He Mengchi Sun Jin Sun | 2023 | Nano Research2023，16，5： | 0 |
| 4 | Feedback regulation system for spraying parameters based on online droplet mass deposit measurements显示文摘In order to effectively optimize and regulate spraying parameters based on actual spraying performance and improve pesticide utilization rate,in this research,a feedback regulation system for the regulation of spraying parameters was designed based on droplet mass deposit online measurement.The system consisted of an online droplet mass deposit measurement module,wireless transmission module,decision module,and spraying parameters regulation module.First,the droplet mass deposits on the sampling points were measured.Based on the deviation between the measured and expected droplet mass,the expected spraying parameters were determined by the decision module.The spraying parameter was regulated to the expected value by regulating the pulse duty cycle on the pump motor using a micro control unit and a relay.Evaluation tests were conducted indoors using an indoor spraying platform and outdoors using an unmanned aerial vehicle.The results showed that the relative errors between the expected and measured droplet mass deposit after regulation were 6.84%and 11.48%for the indoor and outdoor tests,respectively.Therefore,an optimal spraying performance was observed after regulation.This research provided an experimental platform to quickly optimize spraying parameters and also provided technical references for precision spraying. | Chengda Sun Wei Qiu | 2022 | International Journal of Agricultural and Biological Engineering2022，15，2： | 0 |
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