Feedback cooling of a cantilever's fundamental mode below 5 mK

We cool the fundamental mechanical mode of an ultrasoft silicon cantilever from a base temperature of 2.2 K to 2.9 +/- 0.3 mK using active optomechanical feedback. The lowest observed mode temperature is consistent with limits determined by the properties of the cantilever and by the measurement noise. For high feedback gain, the driven cantilever motion is found to suppress or "squash" the optical interferometer intensity noise below the shot noise level.Comment: 4 pages, 6 figure

Nuclear spin relaxation induced by a mechanical resonator

We report on measurements of the spin lifetime of nuclear spins strongly coupled to a micromechanical cantilever as used in magnetic resonance force microscopy. We find that the rotating-frame correlation time of the statistical nuclear polarization is set by the magneto-mechanical noise originating from the thermal motion of the cantilever. Evidence is based on the effect of three parameters: (1) the magnetic field gradient (the coupling strength), (2) the Rabi frequency of the spins (the transition energy), and (3) the temperature of the low-frequency mechanical modes. Experimental results are compared to relaxation rates calculated from the spectral density of the magneto-mechanical noise.Comment: 4 pages, 4 figure

Genetic conservation within managed forests in Amazonia: dendrogene project.

Editado por Bernd Degen, Marilyn D. Loveless e Antoine Kremer

Impact of Molecular Architecture and Adsorption Density on Adhesion of Mussel-Inspired Surface Primers with Catechol-Cation Synergy.

Marine mussels secrete proteins rich in residues containing catechols and cationic amines that displace hydration layers and adhere to charged surfaces under water via a cooperative binding effect known as catechol-cation synergy. Mussel-inspired adhesives containing paired catechol and cationic functionalities are a promising class of materials for biomedical applications, but few studies address the molecular adhesion mechanism(s) of these materials. To determine whether intramolecular adjacency of these functionalities is necessary for robust adhesion, a suite of siderophore analog surface primers was synthesized with systematic variations in intramolecular spacing between catechol and cationic functionalities. Adhesion measurements conducted with a surface forces apparatus (SFA) allow adhesive failure to be distinguished from cohesive failure and show that the failure mode depends critically on the siderophore analog adsorption density. The adhesion of these molecules to muscovite mica in an aqueous electrolyte solution demonstrates that direct intramolecular adjacency of catechol and cationic functionalities is not necessary for synergistic binding. However, we show that increasing the catechol-cation spacing by incorporating nonbinding domains results in decreased adhesion, which we attribute to a decrease in the density of catechol functionalities. A mechanism for catechol-cation synergy is proposed based on electrostatically driven adsorption and subsequent binding of catechol functionalities. This work should guide the design of new adhesives for binding to charged surfaces in saline environments

Promiscuity and high level of multiple paternity in common wall lizards (Podarcis muralis): data from microsatellite markers

Little is known about themating system of the common wall lizard Podarcis muralis. Behavioural and observational data have demonstrated that females frequently mate with multiple males. However, the possible occurrence of multiple paternity has never been investigated. By using microsatellite paternity analysis in a wild population, we document this species indeed mate promiscuously and these matings resulted in multiple paternity in at least 87% of the clutches examined. [Authors]]]> Lizards ; Sexual Behavior, Animal ; Microsatellite Repeats eng oai:serval.unil.ch:BIB_17EAFC1A4DE4 2022-05-07T01:11:25Z <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> https://serval.unil.ch/notice/serval:BIB_17EAFC1A4DE4 Encapsulation of neurotrophic factor-releasing cells for the treatment of neurodegenerative diseases. info:doi:10.3233/RNN-1995-81215 info:eu-repo/semantics/altIdentifier/doi/10.3233/RNN-1995-81215 info:eu-repo/semantics/altIdentifier/pmid/21551809 Aebischer, P. Tan, S.A. Déglon, N. Heyd, B. Zurn, A. Baetge, E. Sagot, Y. Kato, A. info:eu-repo/semantics/article article 1995 Restorative Neurology and Neuroscience, vol. 8, no. 1, pp. 65-66 info:eu-repo/semantics/altIdentifier/pissn/0922-6028 urn:issn:0922-6028 eng oai:serval.unil.ch:BIB_17EB1DA9D7D0 2022-05-07T01:11:25Z <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> https://serval.unil.ch/notice/serval:BIB_17EB1DA9D7D0 De la représentation des assurés devant le tribunal arbitral des assurances institué par l'article 89 LAMal Duc, J.-L. info:eu-repo/semantics/article article 2011 Pratique juridique actuelle (AJP/PJA), vol. 20, no. 1, pp. 85-89 info:eu-repo/semantics/altIdentifier/pissn/1660-3362 fre oai:serval.unil.ch:BIB_17EBAE571092 2022-05-07T01:11:25Z <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> https://serval.unil.ch/notice/serval:BIB_17EBAE571092 Relations between bone densitometry of the forearm and quantitative ultrasound of the calcaneus in elderly women Krieg, M.A. Bovard, E. Cornuz, J. Häuselmann, H.J. Burckhardt, P. info:eu-repo/semantics/conferenceObject inproceedings 1998 2nd Joint Meeting of the American Society for Bone and Mineral Research and the International Bone and Mineral Society, vol. 23, pp. F476 info:eu-repo/semantics/altIdentifier/isbn/8756-3282 eng oai:serval.unil.ch:BIB_17EC19A8E9D8 2022-05-07T01:11:25Z urnserval <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> https://serval.unil.ch/notice/serval:BIB_17EC19A8E9D8 Culture de la performance et abus sexuels dans le sport Ohl, Fabien Schoch, Lucie info:eu-repo/semantics/article article 2020-02-05 Le Temps fre https://serval.unil.ch/resource/serval:BIB_17EC19A8E9D8.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_17EC19A8E9D88 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_17EC19A8E9D88 info:eu-repo/semantics/submittedVersion info:eu-repo/semantics/restrictedAccess Restricted: indefinite embargo Copying allowed only for non-profit organizations https://serval.unil.ch/disclaimer application/pdf oai:serval.unil.ch:BIB_17ED39C35D5A 2022-05-07T01:11:25Z <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> https://serval.unil.ch/notice/serval:BIB_17ED39C35D5A Lectures et plaisirs : pour une reconceptualisation des modes et des types de lecture littéraire info:doi:10.4000/edl.610 info:eu-repo/semantics/altIdentifier/doi/10.4000/edl.610 http://www.unil.ch/edl/fr/home.html Bemporad, C. info:eu-repo/semantics/article article 2014 Etudes de Lettres. Revue de la Faculté des Lettres de l'Université de Lausanne, no. 1, pp. 65-83 info:eu-repo/semantics/altIdentifier/pissn/2296-5084 fre X2074055640/507 <OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"> 2022-05-11T12:07:00Z http://serval.unil.ch/oaiprovider/ oai:serval.unil.ch:BIB_17ED46F3E2BE 2022-05-07T01:11:25Z <oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"> https://serval.unil.ch/notice/serval:BIB_17ED46F3E2BE Stapled Porcine Pericardium Displays Lower Infectivity In Vitro Than Native and Sutured Porcine Pericardium. info:doi:10.1016/j.jss.2021.11.013 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jss.2021.11.013 info:eu-repo/semantics/altIdentifier/pmid/34973547 Del Tatto, B. Le Roy, D. Lambelet, M. Corpataux, J.M. Chakfé, N. Giulieri, S. Allagnat, F. Roger, T. Saucy, F. info:eu-repo/semantics/article article 2022-04 The Journal of surgical research, vol. 272, pp. 132-138 info:eu-repo/semantics/altIdentifier/eissn/1095-8673 urn:issn:0022-4804 <![CDATA[Biological xenografts using tubulized porcine pericardium are an alternative to replace infected prosthetic graft. We recently reported an innovative technique using a stapled porcine pericardial bioconduit for immediate vascular reconstruction in emergency. The objective of this study is to compare the growth and adherence to grafts of bacteria and yeast incubated with stapled porcine pericardium, sutured or naked pericardium. One square centimeter of porcine pericardial patches, with or without staples or sutures, was incubated with 10 &lt;sup&gt;5&lt;/sup&gt; colony forming units of Escherichia coli, Staphylococcus aureus, Staphylococcus epidermidis, and Candida albicans for 1, 6, and 24 h. The medium was collected to quantify planktonic microorganisms, while grafts were sonicated to quantify adherent microorganisms. Dacron and Dacron Silver were analyzed in parallel as synthetic reference prostheses. Stapled porcine pericardium reduced the growth and the adherence of E coli (2- to 30-fold; P &lt; 0.0005), S aureus (11- to 1000-fold; P &lt; 0.0006), S epidermidis (&gt;500-fold; P &lt; 0.0001), and C albicans (12- to 50-fold; P &lt; 0.0001) when compared to medium alone (growth) and pericardium or Dacron (adherence). Native and sutured porcine pericardium interfered with the growth and the adherence of E coli and C albicans, and Dacron with that of S epidermidis. As expected, Dacron Silver was robustly bactericidal. Stapled porcine pericardium exhibited a lower susceptibility to infection by bacteria and yeasts in vitro when compared to the native and sutured porcine pericardium. Stapled porcine pericardium might be a good option for rapid vascular grafting without increasing infectivity

Strong Electron-Phonon Coupling in Superconducting MgB2_2: A Specific Heat Study

We report on measurements of the specific heat of the recently discovered superconductor MgB$_2$ in the temperature range between 3 and 220 K. Based on a modified Debye-Einstein model, we have achieved a rather accurate account of the lattice contribution to the specific heat, which allows us to separate the electronic contribution from the total measured specific heat. From our result for the electronic specific heat, we estimate the electron-phonon coupling constant $\lambda$ to be of the order of 2, significantly enhanced compared to common weak-coupling values $\leq 0.4$. Our data also indicate that the electronic specific heat in the superconducting state of MgB$_2$ can be accounted for by a conventional, s-wave type BCS-model.Comment: 4 pages, 4 figure

Organische Dünger in Topfkulturen auf dem Prüfstand - wie steht es mit der Stickstofffreisetzung?

Matching nitrogen demand of plants and N release of organic fertilizers with respect to amount and timing is one key for successful cultivation of organic ornamentals. Thereby for plants with a low to moderate N demand growers can add the fertilizer as complete preplant application (CPA). For plants with a high N demand splitting fertilization in a reduced preplant application combined with an additional fertigation (RPA+F) is preferable. Aim of the current research was the investigation of N release of organic fertilizers in incubation experiments. Results of the incubation experiment were linked to a pot trial with pelargonium. Incubation experiments reveal that most fertilizers release about 40 to 50 % of total N and most nitrogen is released within the first 21 days. Only for sheep wool a delay of N release up to ten days was found. CPA using sheep wool and RPA+F (irrespective of fertilizer) give the best results. The delayed release pattern of sheep wool seems to match best N demand of plants