4,229 research outputs found
The First Report on the Molecular Identification of Fresh Water Microalgae from Waterfalls of Paracelis, Mountain Province, Philippines
Microalgae belong to diverse groups of complex unicellular photosynthetic microorganisms typically found in the freshwater and marine environment. Towards the isolation and an attempt to report the first molecular identification of freshwater microalgae from the waterfalls of Paracelis, Mountain Province, Philippines, two microalgae were successfully isolated independently, purified, and cultivated for DNA extraction, polymerase chain reaction, and sequencing using gene 16s rRNA and rbcL markers. Based on the 16s rRNA sequence, one of the isolates has a 92.05% sequence similarity to Oscillatoriales cyanobacterium (KJ611413). On the other hand, one isolate has 98.27% sequence similarity with Chlorella pyrenoidosa (AB240145) using the rbcL. The morphological features of two microalgae were described and the phylogenetic trees were constructed using the gene marker
Reflexiones sobre la enseñanza sociosexual en El Salvador
Téngase la idea que se tenga acerca de nuestras fa
cultades sexuales, a nadie se le escapa la importancia que ellas tienen para nuestra vida.
Son facultades inherentes a nuestra naturaleza y deflnitivamente para bien o para mal, deben ocupar su sitio en el conjunto general de lo que somos.Por supuesto nuestra vida será mejor si armonizan y contribuyen a estabilizar el edificio de nuestra personalidad
JOB BURNOUT AND PERFORMANCE OF STAFF NURSES IN SELECTED HOSPITALS IN METRO MANILA
This study was conducted to determine the job burnout and performance of staff nurses in selected tertiary hospitals in Manila using the Oldenburg Burnout Inventory. Results showed that there’s: a high degree of agreement in relation to burnout of the staff-nurses in terms of exhaustion and disengagement; an average level of performance of the staff nurses in terms of task performance, contextual performance, and counter-productive behavior; significant differences between the degrees of agreement in relation to job burnout of the staff-nurses (disengagement and exhaustion) when they are grouped according to nurse-patient ratio and census per area; significant relationships between the degree of agreement in relation to job burnout (disengagement) and overall level of performance of the staff nurses. Researchers pursued this study because some of their colleagues have lost the enjoyment of their job; that they feel that their efforts were being unnoticed; and feel overworked. Through this study, the degree of agreement in relation to job burnout of the staff nurses and their level of performance was determined. This paved a way for the development of new plans and programs to help staff nurses overcome their feelings of burnout, making them more energetic and enthusiastic in performing their job
Delayed Emergence from General Anesthesia
The incidence of perioperative morbidity associated with varying degrees of untreated thyroid disease is unknown, however major complications have been reported including severe hypotension or cardiac arrest, extreme sensitivity to opioids and anesthetics with prolonged unconsciousness, and myxedema coma. Myxedema coma is a rare and life-threatening illness the outcome of which has not been robustly studied in large numbers, partly due to its low incidence. This case illustrates the differential diagnosis of delayed emergence from general anesthesia and the value of a complete history and physical exam. Although delayed emergence from general anesthesia is not uncommon, recognizing the cause and instituting timely treatment is imperative in conditions where delayed therapy can increase morbidity and mortality
Extraction Experiments Using Commerciallv Available Spices
Safe and cost-effective experiments were designed for high school students to enhance their laboratory skills and knowledge on polarity and separation of mixtures. Annatto, Spanish paprika and turmeric were extracted yielding red-orange, light red-orange and yellow color, respectively. These were combined with a blue aqueous solution made from food color resulting to green mixtures. These were all extracted with kerosene or oil/kerosene. The non-polar solutes for each mixture combined with the kerosene or oil/kerosene layer, making the polar phase blue again. Students gained a better understanding of the concepts as shown in their laboratory report and test results
The visible and near-infrared spectra of asteroids in cometary orbits
We study the visible and near-infrared (NIR) spectral properties of different
ACO populations and compare them to the independently determined properties of
comets.
We select our ACOs sample based on published dynamical criteria and present
our own observational results obtained using the 10.4m Gran Telescopio Canarias
(GTC), the 4.2m William Herschel Telescope (WHT), the 3.56m Telescopio
Nazionale Galileo (TNG), and the 2.5m Isaac Newton Telescope (INT), all located
at the El Roque de los Muchachos Observatory (La Palma, Spain), and the 3.0m
NASA Infrared Telescope Facility (IRTF), located at the Mauna Kea Observatory,
in Hawaii. We include in the analysis the spectra of ACOs obtained from the
literature. We derive the spectral class and the visible and NIR spectral
slopes. We also study the presence of hydrated minerals by studying the 0.7
m band and the UV-drop below 0.5 m associated with phyllosilicates.
We present new observations of 17 ACOs, 11 of them observed in the visible, 2
in the NIR and 4 in the visible and NIR. We also discuss the spectra of 12 ACOs
obtained from the literature.
All but two ACOs have a primitive-like class spectrum (X or D-type). Almost
100\% of the ACOs in long-period cometary orbits (Damocloids) are D-types.
Those in Jupiter family comet orbits (JFC-ACOs) are 60\% D-types and
40\% X-types. The mean spectral slope of JFC-ACOs is 9.7 4.6
\%/1000 \AA \ and for the Damocloids this is 12.2 2.0 \%/1000 \AA . No
evidence of hydration on the surface of ACOs is found from their visible
spectra. The slope and spectral class distribution of ACOs is similar to that
of comets.
The spectral classification, the spectral slope distribution of ACOs, and the
lack of spectral features indicative of the presence of hydrated minerals on
their surface, strongly suggest that ACOs are likely dormant or extinct comets.Comment: 11 pages, 10 Figures, published in A&
Induced inflation from a 5D purely kinetic scalar field formalism on warped product spaces
Considering a separable and purely kinetic 5D scalar field on a warped
product metric background we propose a new and more general approach for
inducing 4D scalar potentials on a 4D constant foliation of the 5D space-time.
We obtain an induced potential for a true 4D scalar field instead of a
potential for an effective 4D scalar field. In this formalism we can recover
the usual 4D inflationary formalism with a geometrically induced inflationary
potential. In addition the quantum confinement of the inflaton modes is
obtained naturally from the model for at least a class of warping factors.
Besides the 4D inflationary physics that results of this formalism is
independent of the 4D-hypersurface chosen.Comment: 8 pages Accepted for publication in European Physical Journal
Low-energy Compton scattering on the nucleon and sum rules
The Gerasimov-Drell-Hearn and Baldin-Lapidus sum rules are evaluated in the
dressed K-matrix model for photon-induced reactions on the nucleon. For the
first time the sum of the electric and magnetic polarisabilities
and the forward spin polarisability are explicitly calculated in two
alternative ways -- from the sum rules and from the low-energy expansion of the
real Compton scattering amplitude -- within the {\em same} framework. The two
methods yield compatible values for but differ somewhat for
. Consistency between the two ways of determining the
polarisabilities is a measure of the extent to which basic symmetries of the
model are obeyed.Comment: 9 pages, 4 figures, using REVTeX. More concise version, results
unchanged. To appear in Phys. Rev.
FRW Cosmology From Five Dimensional Vacuum Brans-Dicke Theory
We follow approach of induced matter theory for 5D vacuum BD, introduce
induced matter and potential in 4D hypersurfaces, and employ generalized FRW
type solution. We confine ourselves to scalar field and scale factors be
functions of the time. This makes the induced potential, by its definition,
vanishes. When the scale factor of fifth dimension and scalar field are not
constants, 5D eqs for any geometry admit a power law relation between scalar
field and scale factor of fifth dimension. Hence the procedure exhibits that 5D
vacuum FRW like eqs are equivalent, in general, to corresponding 4D vacuum ones
with the same spatial scale factor but new scalar field and coupling constant.
We show that 5D vacuum FRW like eqs or its equivalent 4D vacuum ones admit
accelerated solutions. For constant scalar field, eqs reduce to usual FRW eqs
with typical radiation dominated universe. For this situation we obtain
dynamics of scale factors for any geometry without any priori assumption. For
nonconstant scalar fields and spatially flat geometries, solutions are found to
be power law and exponential ones. We also employ weak energy condition for
induced matter, that allows negative/positive pressures. All types of solutions
fulfill WEC in different ranges. The power law solutions with negative/positive
pressures admit both decelerating and accelerating ones. Some solutions accept
shrinking extra dimension. By considering nonghost scalar fields and recent
observational measurements, solutions are more restricted. We illustrate that
accelerating power law solutions, which satisfy WEC and have nonghost fields,
are compatible with recent observations in ranges -4/3 < \omega </- -1.3151 and
1.5208 </- n < 1.9583 for dependence of fifth dimension scale factor with usual
scale factor. These ranges also fulfill condition nonghost fields in the
equivalent 4D vacuum BD eqs.Comment: 18 pages, 16 figures, 11 table
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