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MEASUREMENT OF ADHESION FORCES IN AIR WITH THE VIBRATION METHOD

China Particuology 2005年第1期3卷 3-9页

作者： Siegfried Ripperger konrad hein Lehrstuhl für Mechanische Verfahrenstechnik Technische Universit(a|¨)t Kaiserslautern67653 Kaiserslautern Germany Lehrstuhl für Mechanische Verfahrenstechnik Technische Universit(a|¨)t Dresden 01062 Dresden Germany

The vibration method represents a practical method for the measurement of adhesion forces and adhesion force distributions. This method causes sinusoidally alternating stresses and yields detachment and contact forces between particles and substrate of the same order of magnitude. Alternating contact forces of the vibration method can cause an adhesion force intensification through flattening of asperities. The measuring principle of the vibration method and the analysis of experimental results are described in the article. Normal adhesion forces (pull-off forces) are measured using the vibration method and the colloidal probe technique. The results of both methods show good agreement for small particle sizes. The influence of the detachment force direction is shown by comparing tangential and normal adhesion forces measured using particle reentrainment in a turbulent air flow and the vibration method, respectively. The surface roughness of the substrate and the relative humidity are shown to significantly influence the measured adhesion forces. For the calculation of the adhesion forces, an approach by Rabinovich was combined with approximations of plastic micro asperity flattening. The Rabinovich approach accounts for roughness effects on the van der Waals force by incorporating the rms roughness of the interacting surfaces, rms-values of the particles and substrates were measured with atomic force microscopy at different scanning areas.

关键词： adhesion force vibration method roughness

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SMRT-AgRenSeq-d in potato (Solanum tuberosum) as a method to identify candidates for the nematode resistance Gpa5

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Horticulture Research 2023年第11期10卷 271-279页

作者： Yuhan Wang Lynn H.Brown Thomas M.Adams Yuk Woon Cheung Jie Li Vanessa Young Drummond T.Todd Miles R.Armstrong konrad Neugebauer Amanpreet Kaur Brian Harrower Stan Oome Xiaodan Wang Micha Bayer Ingo hein Division of Plant Sciences at the Hutton The University of DundeeErrol RoadInvergowrieDundeeDD25DAUK The James Hutton Institute Errol RoadInvergowrieDundeeDD25DAUK College of Plant Protection China Agricultural UniversityHaidian DistrictBeijing100083China James Hutton Limited The James Hutton InstituteErrol RoadInvergowrieDundeeDD25DAUK Biomathematics and Statistics Scotland Errol RoadInvergowrieDundeeDD25DAUK Crop Research Centre TeagascOak ParkCarlow R93 XE12Ireland HZPC Research B.V.HZPC Edisonweg 58501 XG JoureNetherlands

Potato is the thirdmost important food crop in *** pathogens threaten sustainable crop production but can be controlled,in many cases,through the deployment of disease resistance genes belonging to the family of nucleotide-binding,leucine-rich-repeat(NLR)*** identify effective disease resistance genes in established varieties,we have successfully established SMRT-AgRenSeq in tetraploid potatoes and have further enhanced the methodology by including dRenSeq in an approach that we term *** inclusion of dRenSeq enables the filtering of candidates after the association analysis by establishing a presence/absence matrix across resistant and susceptible varieties that is translated into an F1 *** a SMRT-RenSeq-based sequence representation of the NLRome from the cultivar Innovator,SMRT-AgRenSeq-d analyses reliably identified the late blight resistance benchmark genes Rpi-R1,Rpi-R2-like,Rpi-R3a,and Rpi-R3b in a panel of 117 varieties with variable phenotype *** benchmark genes were identified with an F1 score of 1,which indicates absolute linkage in the *** method also identified nine strong candidates for Gpa5 that controls the potato cyst nematode(PCN)species Globodera pallida(pathotypes Pa2/3).Assuming that NLRs are involved in controlling many types of resistances,SMRT-AgRenSeq-d can readily be applied to diverse crops and pathogen systems.

关键词： resistance linkage crops

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