388 research outputs found
Seasonal variation of intestinal Tapeworms in Gallus gallus domesticus at Ahmednagar region
The present paper deals with the seasonal variation of tapeworms in Gallus gallus domesticus at Ahmednagar region, high prevalence of Raillietina parasite are occurred in winter season followed by summer season and low in rainy season. This type of results indicates that environment factors and feeding habitats are influencing that seasonality of parasitic infection either directly or indirectly
Curing singularities: From the big bang to black holes
Singular spacetimes are a natural prediction of Einstein's theory. Most
memorable are the singular centers of black holes and the big bang. However,
dilatonic extensions of Einstein's theory can support nonsingular spacetimes.
The cosmological singularities can be avoided by dilaton driven inflation.
Furthermore, a nonsingular black hole can be constructed in two dimensions.Comment: To appear as a brief report in Phys. Rev.
A new cestode parasite from the genus cotugnia from Ahmednagar district M.S. India.
The genus Cotugnia was erected by Diamare (1893) [1] with type species C. diagonopora, collected from domestic fowl. Eight specimens of the parasites were collected from the intestine of Gallus gallus domesticus. The present cestode have scolex quadrangular, absence of rostellar hooks, testes 63 in number, ovary oval, ootype small, rounded and postovarian. It was compared and differs from various five species and was considered as new species Cotugnia mohekarii.Â
Oral Candidiasis Review: Pathogenesis, Clinical Presentation, And Treatment Strategies
The candidiasis is an opportunistic infection commonly affecting the oral cavity. The most prevalent clinical symptoms of candidiasis seen in medical and dental practice is oral candidiasis. People who are extremely young, elderly, or already ill are more likely to develop the illness. The present review summarize classification, pathophysiology, laboratory diagnosis and treatment and management of oral candidiasis. Additionally, medicinal herbs and nutraceuticals can be explored as a safe, accessible, and cost-effective therapy option for oral candidiasi
Open and Closed Universes, Initial Singularities and Inflation
The existence of initial singularities in expanding universes is proved
without assuming the timelike convergence condition. The assumptions made in
the proof are ones likely to hold both in open universes and in many closed
ones. (It is further argued that at least some of the expanding closed
universes that do not obey a key assumption of the theorem will have initial
singularities on other grounds.) The result is significant for two reasons:
(a)~previous closed-universe singularity theorems have assumed the timelike
convergence condition, and (b)~the timelike convergence condition is known to
be violated in inflationary spacetimes. An immediate consequence of this
theorem is that a recent result on initial singularities in open,
future-eternal, inflating spacetimes may now be extended to include many closed
universes. Also, as a fringe benefit, the time-reverse of the theorem may be
applied to gravitational collapse.Comment: 27 pages, Plain TeX (figures are embedded in the file itself and they
will emerge if it is processed according to the instructions at the top of
the file
Oral Candidiasis Review: Pathogenesis, Clinical Presentation, And Treatment Strategies
The candidiasis is an opportunistic infection commonly affecting the oral cavity. The most prevalent clinical symptoms of candidiasis seen in medical and dental practice is oral candidiasis. People who are extremely young, elderly, or already ill are more likely to develop the illness. The present review summarize classification, pathophysiology, laboratory diagnosis and treatment and management of oral candidiasis. Additionally, medicinal herbs and nutraceuticals can be explored as a safe, accessible, and cost-effective therapy option for oral candidiasis
Quantum Interference Effects in Slowly Rotating NUT Space-time
General relativistic quantum interference effects in the slowly rotating NUT
space-time as the Sagnac effect and the phase shift effect of interfering
particle in neutron interferometer are considered. It was found that in the
case of the Sagnac effect the influence of NUT parameter is becoming important
due to the fact that the angular velocity of the locally non rotating observer
must be larger than one in the Kerr space-time. In the case of neutron
interferometry it is found that due to the presence of NUT-parameter an
additional term in the phase shift of interfering particle emerges. This term
can be, in principle, detected by sensitive interferometer and derived results
can be further used in experiments to detect the gravitomagnetic charge.
Finally, as an example, we apply the obtained results to the calculation of the
UCN (ultra-cold neutrons) energy level modification in the slowly rotating NUT
space-time.Comment: 11 pages, 1 figure, accepted for publication in Int. J. Mod. Phys. D;
added reference
Atom interferometer as a selective sensor of rotation or gravity
In the presence of Earth gravity and gravity-gradient forces, centrifugal and
Coriolis forces caused by the Earth rotation, the phase of the time-domain atom
interferometers is calculated with accuracy up to the terms proportional to the
fourth degree of the time separation between pulses. We considered double-loop
atom interferometers and found appropriate condition to eliminate their
sensitivity to acceleration to get atomic gyroscope, or to eliminate the
sensitivity to rotation to increase accuracy of the atomic gravimeter.
Consequent use of these interferometers allows one to measure all components of
the acceleration and rotation frequency projection on the plane perpendicular
to gravity acceleration. Atom interference on the Raman transition driving by
noncounterpropagating optical fields is proposed to exclude stimulated echo
processes which can affect the accuracy of the atomic gyroscopes. Using
noncounterpropagating optical fields allows one to get a new type of the Ramsey
fringes arising in the unidirectional Raman pulses and therefore centered at
the two-quantum line center. Density matrix in the Wigner representation is
used to perform calculations. It is shown that in the time between pulses, in
the noninertial frame, for atoms with fully quantized spatial degrees of
freedom, this density matrix obeys classical Liouville equations.Comment: 21 pages, 4 figures, extended references, discussion, and motivatio
Recycling universe
If the effective cosmological constant is non-zero, our observable universe
may enter a stage of exponential expansion. In such case, regions of it may
tunnel back to the false vacuum of an inflaton scalar field, and inflation with
a high expansion rate may resume in those regions. An ``ideal'' eternal
observer would then witness an infinite succession of cycles from false vacuum
to true, and back. Within each cycle, the entire history of a hot universe
would be replayed. If there were several minima of the inflaton potential, our
ideal observer would visit each one of these minima with a frequency which
depends on the shape of the potential. We generalize the formalism of
stochastic inflation to analyze the global structure of the universe when this
`recycling' process is taken into account.Comment: 43 pages, 10 figure
Regular (2+1)-dimensional black holes within non-linear Electrodynamics
(2+1)-regular static black hole solutions with a nonlinear electric field are
derived. The source to the Einstein equations is an energy momentum tensor of
nonlinear electrodynamics, which satisfies the weak energy conditions and in
the weak field limit becomes the (2+1)-Maxwell field tensor. The derived class
of solutions is regular; the metric, curvature invariants and electric field
are regular everywhere. The metric becomes, for a vanishing parameter, the
(2+1)-static charged BTZ solution. A general procedure to derive solutions for
the static BTZ (2+1)-spacetime, for any nonlinear Lagrangian depending on the
electric field is formulated; for relevant electric fields one requires the
fulfillment of the weak energy conditions.Comment: 5 pages, Latex, 2 figure
- …