We continue in this work studying a new Algol (Arabic name) star, which we discovered during our survey on a field located at the edge of the Pleiades open cluster. We have observed this field in the period 2007 – 2010 with three different CCD-camera
s at the University Observatory Jena in Germany using three telescopes from 0.25 to 0.9 m. Our discovered star has an orbital period of days. The location of this star in the HRD is consistent with the age and distance of the already known Pleiades stars in this field. The derived spectral type of the primary star is G9 and K7 for the secondary one. Assuming that our star is a main-sequence star, the derived mass and radius are and for the primary, and for the secondary. refers to the primary star, where refers to the secondary star. is the solar mass, and is the solar radius.
Preterm birth is the leading cause of death for children under one year of age, and the main reason for the child to enter the incubator. Despite medical advances and technical winning in the care of premature infants., but they are exposed in Nurser
y Ward for environment stimuli not compatible with their level of developmental and evolutionary such as high levels of light and the noise that exceed the recommended levels in Nursery Ward. This leads to stress reactions by premature immature systems. demonstrating in one of their faces instability in vital indicators especially heart rate and oxygenation which may submit him for a short or long-term injuries .
Aim of the study:
Determine the effect of reducing the level of light and noise intensity in environment of Nursery Ward on the heart rate and oxygenation for premature infants.
Materials & Methods:
This true experimental design study of before and after on a sample of 30 premature acceptable in the Nursery Ward in Albasel Hospital in Tartous. they were selected in simple random way. Data were collected using a list to record demographic and health information for the mother and premature. reads of light-meter and noise-meter sitting beside the premature incubator, and reads of Oxy-meter connected to the premature wrist. was taken to every 5 minutes in each phase of the four phases, 60 minutes for each one, and conducted in the same day.1) Non intervention phase. 2) reduce light Intensity without noise Intensity reduction phase.3) reduce noise Intensity without light Intensity reduction phase.4) reduce light and noise Intensity together phase. These data were collected and analyzed using appropriate statistical programs.
Results:
This study showed a significant decrease in the mean of heart rate and a significant increase in the mean of oxygenation in the last three phases, compared with means in the first phase. This reduction and increase in the means was larger significantly in the fourth stage compared with the second and third phases. That because reducing light and noise will reduce its physiological stress to premature thus lower the pulse rate and increasing oxygenation. We can thus reduce the use of light and noise measures to improve the care environment for premature.
Species of the genus Campylobacterare recognized as the main cause of foodborne disease in both developing and developed countries. They are main causative of diarrhea and gastroenteritis worldwide. Staphylococcus bacteria especially S. aureus are re
sponsible of food poisoning due to their ability to produce enterotoxins.
Traditional methods which are used to identify bacteria are time-consuming and labor intensive and very expensive.
Thirteen isolates of Campylobacter and twenty-two isolates of Staphylococcus were isolated from a variety of foods. Traditional methods based on biochemical tests were used for identification in addition to laser light-scattering technique to discriminate isolates.
Laser light-scattering technique showed the ability to distinguish all isolate in high accuracy, rapid and low costs manner, thus it may represent a potential alternative to traditional methods to identify these bacteria.
So it is a very important issue to find new alternative methods characterized by high accuracy, low costs and rapidity in results achievement, to replace traditional methods, thus laser light-scattering may be a possible alternative
The effect of the reversible photo-orientation of the Solvent Red 23 dye
incorporated in Poly (methyl methacrylate) thin films has been investigated. A
probe-pump optical system was used to investigate the dichroic behavior of the
samples. Orthogo
nal polarized laser light induces a smaller increase in the
transmitted beam intensity. A stronger polar order was induced using a
parallel pump-probe laser light compared to that of the perpendicular state. It
was found that the dichroic ratio value of the Poly (methyl methacrylate) /
Solvent Red 23 thin film is 4.952, which indicates that the net orientation of
Solvent Red 23 molecules is orthogonal to the applied beam field. The dynamic
evolution of the dichroic ratio showed that the relaxation is rather slow, and it
deteriorates in a slow logarithmic fashion, which may take a very long time in
order to reach the isotropic state.
In this paper, an optical setup to produce harmonic hyper-Rayleigh light
scattering (HRS) from organic molecules in solution has been built up. In
principle, HRS measures contribution coefficients of dipole and octupole parts.
The nonlinear suscep
tibility of the second order of six organic molecules in
solution from different chemical components such as Pyridinium, Quinolinium
groups and organic Borone complexes has been determined. The nonlinear
susceptibility measurements help to discover and select the most efficient
molecules which can be used later as polymer matrices.
تم بناء المخطط التجريبي اللازم لدراسة تأثير ضوء الليزر النبضي في البلورات اللاخطية
فقد استخدمنا ليزرين نبضيين متماثلين بأطوال موجية قريبة من ١٠,٦ ميكرومترًا و تمكنا من توليد فرق المزج التواتري .
The results of this study showed the important role of the light
intensity compared with the light exposure time on coloring the new
formed leaves, also this study had showed that the leaves are not
affected by the different temperatures, and also
that these plants showed
a decrease in the different pigment substances in close proportions.
Concerning the amount of proteins, the results have shown main
differences in the protein bands between the mutated and the natural
species, but we have found a decrease in the amount of proteins in the
mutated species than in natural species.
