نتایج جستجو برای: alpha ray
تعداد نتایج: 500857 فیلتر نتایج به سال:
SN 2014C was originally classified as a Type Ib supernova, but at phase {\phi} = 127 d post-explosion strong H{\alpha} emission observed. has since been observed in radio, infrared, optical and X-ray bands. Here we present new spectroscopic photometric data spanning 947 - 2494 post-explosion. We address the evolution of broadened line, well broad [O III] other lines. also conduct parallel analy...
We report the detection of CO emission in recently discovered multiphase isolated gas cloud nearby galaxy cluster Abell 1367. The is located about 800 kpc projection from center and at a projected distance > 80 any galaxy. It first only known intra-cluster detected X-ray, H$\alpha$, emission. found total $2.2\times 10^8 M_\odot$ H$_2$ with IRAM 30-m telescope two regions, one associated peak H$...
در این پایان نامه ابتدا دو رده از عملگرهای روی فضای هیلبرت به نام های $-(alpha,eta)$ نرمال و $a^*_p$ که تعمیمی از عملگرهای نرمال می باشند، تعریف می شود و نشان داده می شود که تحت شرایط مطلوبی $z+t$ نیز $-(alpha,eta)$ نرمال خواهد بود و در برخی حالت ها مضربی از نرم عملگری این رده عملگرها از شعاع طیفی کوچکتر می باشد. همچنین نشان داده می شود که عملگرهای رده ی $a^*_p$ نرمال گون هستند و صفر ...
An alpha-gamma coincidence method, using multi-parameter analyzer (MPA) system in list mode was used for measuring parameters of transuranium sources. The benefit of using the list method is preventing duplication of experiments a lot and thus saving the cost and time taken for this type of testing that due to very small sample rate, spend a lot of time. The multi-parameter analyzer stores the ...
Miscut surfaces of layered crystals can exhibit a stair-like sequence terraces having periodic variation in their atomic structure. For hexagonal close-packed and related crystal structures with an {\alpha}{\beta}{\alpha}{\beta} stacking sequence, there have been long-standing questions regarding how the differences adatom attachment kinetics at steps separating affect fractional coverage {\alp...
The effects of vitamin E on the activity of membrane-dependent enzymes suggest that it acts indirectly by modifying some properties of the lipid host. The effects of alpha-tocopherol (alpha-T) and alpha-tocopherol hemisuccinate (alpha-THS) on phospholipid monolayer structure, curvature, and bending elasticity were examined using X-ray diffraction and the osmotic stress method. These ligands wer...
In situ x-ray diffraction studies of iron under shock conditions confirm unambiguously a phase change from the bcc (alpha) to hcp (epsilon) structure. Previous identification of this transition in shock-loaded iron has been inferred from the correlation between shock-wave-profile analyses and static high-pressure x-ray measurements. This correlation is intrinsically limited because dynamic load...
Optical birefringence and x-ray measurements are reported for single crystals (0.5 mm X 2 mm X 5 micrometers) of dipalmitoylphosphatidylcholine as a function of temperature and relative humidity. Large single crystals grown in CHCl3/acetone at a low water concentration undergo an irreversible phase transformation at 20 degrees C and 70% relative humidity or at 60 degrees C and 65% relative humi...
Measurements by instruments on spacecraft have significantly advanced cosmochemistry. Spacecraft missions impose serious limitations on instrument volume, mass, and power, so adaptation of laboratory instruments drives technology. We describe three examples of flight instruments that collected cosmochemical data. Element analyses by Alpha Particle X-ray Spectrometers on the Mars Exploration Rov...
Fucosidosis is a rare genetic lysosomal storage disorder caused by a deficiency in alpha- L-fucosidase. We present a case of a 4-year, 11-month-old girl with developmental delay, as well as skeletal and brain abnormalities as shown on X-ray and MRI. Her spinal X- rays demonstrated lumbar kyphosis and anterior beaking of lumbar vertebral bodies. Lower iliac segment constriction, increased angula...
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