158 research outputs found
Interactions of the 3pÏᔀcÂčΠᔀ(v=2) Rydberg-complex member in isotopic Nâ
The 3pÏᔀcÂčΠᔀâXÂčÎŁgâș(2,0)Rydberg and bâČÂčΣᔀâșâXÂčÎŁgâș(7,0) valence transitions of ÂčâŽNâ, ÂčâŽNÂčâ”N, and Âčâ”Nâ are studied using laser-based 1 extreme ultraviolet (XUV)+1âČUV two-photon-ionization spectroscopy, supplemented by synchrotron-based photoabsorption measurements in the case of ÂčâŽNâ. For each isotopomer, effective rotational interactions between the c(v=2) and bâČ(v=7) levels are found to cause strong Î-doubling in c(v=2) and dramatic PâR-branch intensity anomalies in the bâČâX(7,0) band due to the effects of quantum interference. Local perturbations in energy and predissociation line width for the c(v=2)Rydberg level are observed and attributed to a spin-orbit interaction with the crossing, short-lived C³Πᔀ(v=17) valence level.This research was partially supported by Australian Research
Council Discovery Program Grant Nos. DP0558962
and DP0773050
A Simple Entropic-Driving Separation Procedure of Low-Size Silver Clusters, Through Interaction with DNA
Synthesis and purification of metal clusters without strong binding agents by wet chemical methods are very attractive for their potential applications in many research areas. However, especially challenging is the separation of uncharged clusters with only a few number of atoms, which renders the usual techniques very difficult to apply. Herein, we report the first efficient separation of Ag2 and Ag3 clusters using the different entropic driving forces when such clusters interact with DNA, into which Ag3 selectively intercalates. After sequential dialysis of the samples and denaturalizing the DNA-Ag3 complex, pure Ag2 can be found in the dialysate after extensive dialysis. Free Ag3 is recovered after DNA denaturation
From exercise intolerance to functional improvement: The second wind phenomenon in the identification of McArdle disease
McArdle disease is the most common of the glycogen storage diseases. Onset of symptoms is usually in childhood with muscle pain and restricted exercise capacity. Signs and symptoms are often ignored in children or put down to 'growing pains' and thus diagnosis is often delayed. Misdiagnosis is not uncommon because several other conditions such as muscular dystrophy and muscle channelopathies can manifest with similar symptoms. A simple exercise test performed in the clinic can however help to identify patients by revealing the second wind phenomenon which is pathognomonic of the condition. Here a patient is reported illustrating the value of using a simple 12 minute walk test.RSS is funded by CiĂȘncias sem Fronteiras/CAPES Foundation. The authors would like to thank the Association
for Glycogen Storage Disease (UK), the EUROMAC Registry funded by the European Union, the Muscular Dystrophy Campaign, the NHS National Specialist Commissioning Group and the Myositis Support Group for funding
Shell structure at N=28 near the dripline: spectroscopy of Si, P and S
Measurements of the N=28 isotones 42Si, 43P and 44S using one- and two-proton
knockout reactions from the radioactive beam nuclei 44S and 46Ar are reported.
The knockout reaction cross sections for populating 42Si and 43P and a 184 keV
gamma-ray observed in 43P establish that the d_{3/2} and s_{1/2} proton orbits
are nearly degenerate in these nuclei and that there is a substantial Z=14
subshell closure separating these two orbits from the d_{5/2} orbit. The
increase in the inclusive two-proton knockout cross section from 42Si to 44S
demonstrates the importance of the availability of valence protons for
determining the cross section. New calculations of the two-proton knockout
reactions that include diffractive effects are presented. In addition, it is
proposed that a search for the d_{5/2} proton strength in 43P via a higher
statistics one-proton knockout experiment could help determine the size of the
Z=14 closure.Comment: Phys. Rev. C, in pres
Quimioterapia intensiva con 1-3 fĂĄrmacos y soporte con cĂ©lulas mielopoyĂ©ticas autĂłlogas extraĂdas de la sangre perifĂ©rica: resultados preliminares
1. La recuperaciĂłn de la mĂ©dula Ăłsea tras quimioterapia a altas dosis puede ser acortada mediante soporte con cĂ©lulas mielopoyĂ©ticas autĂłlogas extraĂdas de la sangre perifĂ©rica.
2. Dichas células mantienen su viabilidad con técnicas de cultivo standard, sin necesidad de congelación
Electroactive polyacrylates bearing linear conjugated systems based on EDOT moieties
New polyacrylates bearing an electropolymerizable bi or terthiophene group have been synthesized via classical radical polymerization and via RAFT process. Polymerizations can be controlled if thiophene moieties have protected α positions; otherwise polymerization is difficult or impossible. Cross-linked polymers can be obtained after film electropolymerizations on different electrodes (gold, carbon and platinum)
Quimioterapia complementaria del cĂĄncer de mama; experiencia de la ClĂnica Universitaria de Navarra
Desde 1982 a 1989 se han tratado 68 pacientes con carcinoma de mama. 57 han sido premenopĂĄusicas y 11 postmenopĂĄusicas.
El estadio tumoral mĂĄs frecuente ha sido T2N1 (44,1 %) seguido de T1N1 (20,6 %). La dosis media de quimioterapia recibida ha sido de 91,2 %, 88 % y 94 % para la ciclofosfamida, metotrexate y 5-fluorouracilo respectivamente.
El tratamiento ha sido bien tolerado, siendo la toxicidad mĂĄs frecuente la hematolĂłgica
(leucopenia). Las pacientes premenopĂĄusicas han presentado un intervalo libre de enfermedad de 89,4 % a 96 meses y las postmenopĂĄusicas de 63,3 % a 68 meses.
No se han observado diferencias en el intervalo libre de enfermedad segĂșn el tamaño del primario o la positividad del tumor a receptores de estrĂłgeno o progesterona.
Los factores pronĂłsticos mĂĄs importantes de esta serie han sido el nĂșmero de ganglios axilares afectos y la dosis de quimioterapia recibid
Absolute and Relative Surrogate Measurements of the \u3csup\u3e236\u3c/sup\u3eU(\u3cem\u3en,f\u3c/em\u3e) Cross Section as a Probe of Angular Momentum Effects
Using both the absolute and relative surrogate techniques, the 236U(n,f) cross section was deduced over an equivalent neutron energy range of 0 to 20 MeV. A 42 MeV 3He beam from the 88 Inch Cyclotron at Lawrence Berkeley National Laboratory was used to perform a (3He,α) pickup reaction on targets of 235U (JÏ=7/2â) and 238U (JÏ = 0+) and the fission decay probabilities were determined. The 235U(3He,αf) and 238U(3He,αf) were surrogates for 233U(n,f) and 236U(n,f), respectively. The cross sections extracted using the surrogate method were compared to directly measured cross sections. The sensitivity of these cross sections to the JÏ -population distributions was explored
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