Introduction: Lung morphometry technique that utilizes 3He MRI [1, 2] demonstrated in vivo quantification of lung geometrical parameters in humans, comparable to those obtained through histology. As part of the broader effort, this technique, optimized for mouse lungs, allowed us to calculate mouse lung geometry comparable to histological findings. In our approach, lung airways are considered a...

Paleocene basaltic lavas exposed on Baffin Island have the highest 3He/4He found in any terrestrial igneous rocks and potentially contain most pristine primordial mantle material Earth's surface. By vacuum-crushing large (1–3 g) olivine mineral separates, we extracted enough magmatic gas to obtain first coupled helium, neon, argon isotopic compositions of lavas. The five samples ranging from 36...

A K-3He co-magnetometer has been developed for a test of Lorentz and CPT symmetry. Polarized K vapor forms a spin-exchange relaxation-free (SERF) magnetometer that has record sensitivity of about 1 fT/ √ Hz. The polarized 3He effectively suppresses sensitivity to the magnetic fields and gradients. Together, the K-3He comagnetometer retains sensitivity to anomalous, CPTand Lorentz-violating fiel...

Asthma is a disease characterized by chronic inflammation and reversible obstruction of the small airways resulting in impaired pulmonary ventilation. Hyperpolarized 3He magnetic resonance (MR) lung imaging is a new technology that provides a detailed image of lung ventilation. Hyperpolarized 3He lung imaging was performed in 10 asthmatics and 10 healthy subjects. Seven asthmatics had ventilati...

An open-cage fullerene incorporating phosphorous ylid and carbonyl group moieties on the rim of orifice can be filled with gases (H2, He, Ne) in solid state, cage opening then contracted situ by raising temperature to complete an intramolecular Wittig reaction, trapping atom or molecule inside. Known transformations conversion product C60 containing endohedral species. As well as providing impr...

INTRODUCTION This study aims to quantify global and regional changes of diffusive motion of 3He gas within the lung, as determined by hyperpolarized 3He MR apparent diffusion coefficient (ADC) measurement, in non-smokers, smokers and chronic obstructive pulmonary disease (COPD) patients. METHODS Age-matched groups of six healthy non-smokers, five healthy smokers and five patients with COPD. T...

1. Recently there have been experimental studies of thin 3He films one or two atoms in thickness [1]. In ref. [2] a microscopic model o f the 3He film was suggested, based on the 3-dimensional model of 3He developed earlier [3]. As shown in ref. [2] , in two dimensions there may exist several superfluid phases, two of them being energetically preferable and stable under small fluctuations (the ...

By the use of the f sum rule and a separation of density excitations into single and multiple excitations, we derive exact quantum expressions for the ~ backflow contribution to the dynamic structure function S(k, co) and for the discrete single-excitation spectrum ok:. The derivation is carried out for Bose liquids, Fermi liquids, charged quantum liquids, quantum solutions, an impurity atom di...