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Sensitive capacitive pressure sensors based on graphene membrane arrays

Microsystems & Nanoengineering 2020年第1期6卷 176-184页

作者： Makars Siskins Martin Lee Dominique wehenkel Richard van Rijn tijmen w.de jong Johannes R.Renshof Berend C.Hopman willemijn S.J.M.Peters dejan Davidovikj Herre S.J.van der Zant Peter G.Steeneken Kavli Institute of Nanoscience Delft University of TechnologyLorentzweg 12628 CJ DelftThe Netherlands Applied Nanolayers B.V. Feldmannweg 172628 CT DelftThe Netherlands department of Precision and Microsystems Engineering Delft University of TechnologyMekelweg 22628 CD DelftThe Netherlands

The high flexibility,impermeability and strength of graphene membranes are key properties that can enable the next generation of nanomechanical ***,for capacitive pressure sensors,the sensitivity offered by a single suspended graphene membrane is too small to compete with commercial ***,we realize highly sensitive capacitive pressure sensors consisting of arrays of nearly ten thousand small,freestanding double-layer graphene *** fabricate large arrays of small-diameter membranes using a procedure that maintains the superior material and mechanical properties of graphene,even after high-temperature *** sensors are readout using a low-cost battery-powered circuit board,with a responsivity of up to 47:8aF Pa^(−1) mm^(−2),thereby outperforming the commercial sensors.

关键词： graphene arrays thereby

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The Prognostic Value of Myocardial deformation in Patients with Congenital Aortic Stenosis

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Congenital Heart Disease 2021年第3期16卷 221-232页

作者： Roderick w.J.van Grootel Allard T.van den Hoven Dan Bowen tijmen Ris Jolien w.Roos-Hesselink Annemien E.van den Bosch department of Cardiology Erasmus Medical CentreRotterdamThe Netherlands

Aims:To assess the prognostic value of left ventricular(LV)global longitudinal strain(GLS)and global longitudinal early diastolic strain rate(GLSre)with regard to cardiovascular events,as congenital aortic stenosis(AoS)is associated with significant mortality and morbidity but predictors for clinical outcome are *** analysis provides a robust and reproducible method for early detection of LV dysfunction,which might be of prognostic ***:This prospective study,included clinically stable patients with congenital AoS between 2011–*** GLS and GLSre was performed in the apical 4,3 and 2-chamber views using Tomtec *** endpoint was a composite of death,heart failure,hospitalization,arrhythmia,thrombo-embolic events and ***:In total 138 patients were included(33[26–43]years,86(62%)male),NYHA class I:134(97%).Mean LV GLS was–15.3±3.2%,GLSre 0.66±0.18 s–*** correlated with NT-proBNP,LV volumes and ejection fraction(strongest LV GLS with LV EF:r–0.539,pwith age:r–0.376,pw-up of 5.9[5.5–6.2]years,the endpoint occurred in 53(38%)patients:4 patients died,9 developed heart failure,22 arrhythmias,8 thrombo-embolic events and 35 *** LV GLS(standardized HR(sHR 0.62(95%CI 0.47–0.81)and GLSre(sHR 0.62(95%CI 0.47–0.83)were associated with the *** multivariable analysis showed that both GLS and GLSre were associated independent of left atrial volume,NT-proBNP and prior ***:Left ventricular GLS and GLSre are reduced in adult patients with congenital *** markers are associated with adverse cardiac events and have clear clinical relevance.

关键词： Speckle tracking echocardiography congenital aortic stenosis strain prognosis

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In vitro 3D phenotypic drug screen identifies celastrol as an effective in vivo inhibitor of polycystic kidney disease

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Journal of Molecular Cell Biology 2020年第8期12卷 644-653页

作者： tijmen H.Booij wouter N.Leonhard Hester Bange Kuan Yan Michiel Fokkelman Anna J.Plugge Kimberley A.M.Veraar Johannes G.Dauwerse Gerard J.P.van westen Bob van de water Leo S.Price Dorien j.M.Peters Division of Toxicology Leiden Academic Centre for Drug Research(LACDR)Leiden UniversityLeidenThe Netherlands Present address:NEXUS Personalized Health Technologies ETH ZurichSwitzerland department of Human Genetics Leiden University Medical Center(LUMC)LeidenThe Netherlands OcellO B.V. LeidenThe Netherlands Division of Medicinal Chemistry Leiden Academic Centre for Drug Research(LACDR)LeidenThe Netherlands

Polycystic kidney disease(PKD)is a prevalent genetic disorder,characterized by the formation of kidney cysts that progressively lead to kidney *** currently available drug tolvaptan is not well tolerated by all patients and there remains a strong need for alternative *** signalling rewiring in PKD that drives cyst formation is highly complex and not fully *** a consequence,the effects of drugs are sometimes difficult to *** previously established a high-throughput microscopy phenotypic screening method for quantitative assessment of renal cyst ***,we applied this 3D cyst growth phenotypic assay and screened 2320 small drug-like molecules,including approved *** identified 81 active molecules that inhibit cyst ***-parametric phenotypic profiling of the effects on 3D cultured cysts discriminated molecules that showed preferred pharmacological effects above genuine toxicological ***,a triterpenoid from Tripterygium wilfordii,was identified as a potent inhibitor of cyst growth in *** an in vivo iKspCre-Pkd1^lox,lox mouse model for PKD,celastrol inhibited the growth of renal cysts and maintained kidney function.

关键词： PKD celastrol pyrvinium pamoate high-content screening 3D

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