616 research outputs found
Interferometric measurement of interhyperfine scattering lengths in Rb
We present interferometeric measurements of the to
inter-hyperfine scattering lengths in a single-domain spinor Bose-Einstein
condensate of Rb. The inter-hyperfine interaction leads to a strong and
state-dependent modification of the spin-mixing dynamics with respect to a
non-interacting description. We employ hyperfine-specific Faraday-rotation
probing to reveal the evolution of the transverse magnetization in each
hyperfine manifold for different state preparations, and a comagnetometer
strategy to cancel laboratory magnetic noise. The method allows precise
determination of inter-hyperfine scattering length differences, calibrated to
intra-hyperfine scattering length differences. We report
and
, limited by
atom number uncertainty. With achievable control of atom number, we estimate
precisions of should be possible with this technique
Validation of the Clinical COPD questionnaire in Italian language
BACKGROUND: The development and validation study of the Clinical Chronic Obstructive Disease (COPD) Questionnaire (CCQ) has recently been published in this journal. The CCQ is the first questionnaire that incorporates both clinician and patient guideline goals in the clinical control evaluation of patients with COPD in general clinical practice. The aim of this study is the validation of the CCQ questionnaire in Italian, in specific pulmonary disease clinical practice. METHODS: Validity was tested on a population of healthy subjects and patients with COPD, using the Italian validated version of the Short Form Health Survey (SF-36) and guideline recommended routine measurement in COPD patients (FEV(1), FVC, BMI and functional dyspnoea). Test-retest reliability was tested by re-administering the CCQ after 2 weeks. Responsiveness was tested by re-administering the CCQ after three weeks of hospital pulmonary rehabilitation. Distance walked and Borg breathlessness rating were measured at the end of the six-minute walking test (6 MWT), before and after rehabilitation. RESULTS: Cross-sectional data were collected from 175 subjects (55 healthy; 40 mild-moderate, 50 severe and 25 very severe COPD). Cronbach's alpha was high (0.89). The CCQ scores in patients were significantly worse than in healthy subjects. The CCQ total score in patients with COPD was significantly worse in those with BMI < = 21. Significant correlations were found between the CCQ total score and domains of the SF-36 (rho = -0.43 to rho = -0.72). The correlation between the CCQ and FEV1 % predicted was rho = -0.57. The correlation between the CCQ and MRC was rho = 0.63. Test-retest reliability was determined in 112 subjects over a period of two weeks (Intra Class Coefficient = 0.99). Forty-six patients with COPD showed significant improvement in CCQ scores, distance-walked and Borg breathlessness rating after 3 weeks of pulmonary rehabilitation, indicating CCQ responsiveness. CONCLUSIONS: The CCQ is self-administered and has been specially developed to measure clinical control in patients with COPD. Data support its validity, reliability and responsiveness in Italian and in specific pulmonary disease clinical practice
Bose-Einstein Condensate Comagnetometer
We describe a comagnetometer employing the and ground state
hyperfine manifolds of a Rb spinor Bose-Einstein condensate as
co-located magnetometers. The hyperfine manifolds feature nearly opposite
gyromagnetic ratios and thus the sum of their precession angles is only weakly
coupled to external magnetic fields, while being highly sensitive to any effect
that rotates both manifolds in the same way. The and transverse
magnetizations and azimuth angles are independently measured by non-destructive
Faraday rotation probing, and we demonstrate a common-mode
rejection in good agreement with theory. We show how spin-dependent
interactions can be used to inhibit hyperfine relaxing
collisions, extending to the transverse spin lifetime of the
mixtures. The technique could be used in high sensitivity searches for
new physics on sub-millimeter length scales, precision studies of ultra-cold
collision physics, and angle-resolved studies of quantum spin dynamics
CONSOLIDATED FINANCIAL STATEMENTS OF MUNICIPAL CORPORATION: LOCAL GAAP VERSUS INTERNATIONAL ACCOUNTING STANDARDS.
Synthesis and Characterization of Pyrazole-Enriched Cationic Nanoparticles as New Promising Antibacterial Agent by Mutual Cooperation
A pyrazole derivative (CB1) was previously evaluated in vivo for various pharmacological activities (with the exception of antimicrobial effects), using DMSO as the administrative medium, mainly due to its water insolubility. Considering the global necessity for new antimicrobial agents, CB1 attracted our attention as a candidate to meet this need, mainly because the secondary amine group in its structure would make it possible to obtain its hydrochloride salt (CB1H), thus effortlessly solving its water-solubility drawbacks. In preliminary microbiologic investigations on Gram-negative and Gram-positive bacteria, CB1H displayed weak antibacterial effects on MDR isolates of Gram-positive species, nonetheless better than those displayed by the commonly-used available antibiotics. Therefore, aiming at improving such activity and extending the antibacterial spectrum of CB1H to Gram-negative pathogens, in this first work CB1 was strategically formulated in nanoparticles using a cationic copolymer (P7) previously developed by us, possessing potent broad-spectrum bactericidal activity. Using the nanoprecipitation method, CB1H-loaded polymer nanoparticles (CB1H-P7 NPs) were obtained, which were analyzed by attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy to confirm the successful loading. Additionally, CB1H-P7 NPs were fully characterized in terms of morphology, size, polydispersity indices, surface charge, DL%, and EE%, as well as release and potentiometric profiles
Acalculous cholecystitis during the course of acute Epstein—Barr virus infection and Gilbert's syndrome
The Key Role of the Electronic Control Technology in the Exploitation of the Alternative Renewable Fuels for Future Green, Efficient and Clean Diesel Engines
Welfare Assessment on Pasture: A Review on Animal-Based Measures for Ruminants
Outdoor and extensive farming systems allow animals to behave in a natural way and are
often perceived as welfare friendly. Nonetheless, the natural environment poses multiple challenges
to the welfare of animals, sometimes hampering their capacity to cope. Welfare assessment in
outdoor and extensive systems has been rarely investigated, and little is known about the most
appropriate indicators. The aim of this review was to identify animal-based measures of welfare to
apply in extensive and pasture-based systems in domestic ruminants. Through the use of a
dedicated software for systematic reviews, 810 papers were screened and a total of 52 papers were
retained for in-depth analysis. ABM resulting from these papers were initially divided according to
the species (cattle and small ruminants, including sheep and goats) and then to four principles:
comfort, behavior, feeding and health. The results showed that welfare data were collected applying
different methodologies, with an increasing use of sensors in recent years. The need to herd and
restrain animals for individual data collection is one of the major constraints to data collection in
extensive farming systems. It is suggested that welfare assessment in outdoor/extensive farming
systems is carried out by following shared procedures in order to provide evidence of the higher
animal welfare claims that these products often imply compared to indoor systems
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