68 research outputs found
On the ratio of consecutive gaps between primes
In the present work we prove a common generalization of Maynard-Tao's recent
result about consecutive bounded gaps between primes and on the
Erd\H{o}s-Rankin bound about large gaps between consecutive primes. The work
answers in a strong form a 60 years old problem of Erd\"os, which asked whether
the ratio of two consecutive primegaps can be infinitely often arbitrarily
small, and arbitrarily large, respectively
Novel Bound States Treatment of the Two Dimensional Schrodinger Equation with Pseudocentral Plus Multiparameter Noncentral Potential
By converting the rectangular basis potential V(x,y) into the form as
V(r)+V(r, phi) described by the pseudo central plus noncentral potential,
particular solutions of the two dimensional Schrodinger equation in plane-polar
coordinates have been carried out through the analytic approaching technique of
the Nikiforov and Uvarov (NUT). Both the exact bound state energy spectra and
the corresponding bound state wavefunctions of the complete system are
determined explicitly and in closed forms. Our presented results are identical
to those of the previous works and they may also be useful for investigation
and analysis of structural characteristics in a variety of quantum systemsComment: Published, 16 page
Gamma radiation treatment applied to microbial decontamination of products derived from eggs collected from the retail market in São Paulo
Detection of adenovirus hexon sequence in a cat by polymerase chain reaction(short communication)
Adenoviral nucleic acid was detected by polymerase chain reaction (PCR) in pharyngeal and rectal swab samples of a cat seropositive for adenovirus and suffering from transient hepatic failure. The samples were taken at a one-year interval, and both faecal samples as well as the second pharyngeal sample were positive in PCR performed with general adenovirus primers. The size of the amplified products corresponded to that of the positive control. The identity of the amplicons was also confirmed by DNA sequencing. The 301 bp long hexon gene fragment was very similar to but distinguishable from the corresponding hexon sequence of human adenovirus type 2. This result suggests the possibility of persistent carrier status and shedding of adenovirus in cats
Evaluation of scanning parameters for a surfacecolour laser scanner
Recent innovations in laser scanner technology provide a potentially useful technique for accurate three-dimensional (3D) documentation of the face. Aim of this study was to evaluate and optimise facial surface acquisition parameters and measurements obtained by a Cyberware colour laser scanner and to compare those measures to the common anthropometric ones made by individual examiners. This preliminary study indicates that 3D scanning is a sufficiently precise and repeatable surface 3D acquisition method
Scanning electron microscopic observation of Bruch's membrane with the osmium tetroxide treatment.
Comparison of the Stress Response to Cryopreservation in Monolayer and Three-Dimensional Human Fibroblast Cultures: Stress Proteins, MAP Kinases, and Growth Factor Gene Expression
Relajantes musculares en el estudio morfométrico de los músculos respiratorios en seres humanos
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