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Register a new userStudy of effect of ultrasound weaves on dyeing polyester with disperse dyes
دراسة تأثير الأمواج فوق الصوتية على صباغة البوليستر بالأصبغة المعلقة
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لقد استخدمنا في هذا البحث تقنية الأمواج الفوق صوتية US كوسيلة من أجل تحسين كفاءة عملية صباغة ألياف البوليستر بالأصبغة المعلقة و كان ترددها المستخدم 42KHz في حمام الصباغة، حيث سيتم دراسة السلوك الصباغي للبوليستر عند صباغته بالأصبغة المعلقة بالطرق التقليدية أي بدون استخدام US و بوجودها.
In this study we used ultrasonic technology as a means of enhancing dyeing process efficiency of polyester fibers with disperse dyes, which had frequency 42kHz and, we studied the behavior of dye when the polyester dyed with (US) and with traditional dyeing methods (without US).
References used
David N. Cheeke Physics Department Concordia University Montreal, Qc, Canada Fundamentals and Applications of ultrasonic Waves Book،2002 by CRC Press LLC
Giles C,H1957, Notes For a Laboratory Cowrse in Dyeing, Society Of Dyers and Colorists, UK
HARRISON W.B., Textile Progress Protective Clothing, Manchester Metrpolitan University,UK, 1992
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In this research, we did the optical spectral study for using
ultrasound energy in dyeing wool fibers using acid dyes. That we
dyed wool fibers using both traditional dyeing and ultrasound
techniques by using three acid dyes from different firms.
The results of exhaustion percentage of the dye had been compared "the total moving dyes from a solution to fibers after dyeing".
The exhaustion rate of some dyes increased by a large proportion
but the effect on the fastness of the light, rubbing and washing was not great.
Bleaching process of cotton fabrics consider an important and
sensitive operations in wet chemical treatments of cotton fabrics,
mercerization is not less important than them and that in cases in which
is made necessary, but from the problems of t
hese processes are long
time and consumption of energy, but the ultrasound energy contribute
to reduce these problems.
This research is based on the use of different types of mineral
mordants, mineral salts, in the dyeing process using the aqueous
extract of eucalyptus leaves. The used mordants are aluminum
potassium sulphate, copper sulphate, iron sulphate and mi
xtures of
these mordants. Study the effect of these mordants on the dyeing
process.
This study was conducted at AL Assad University Hospital in Latakia in 2012. It was a prospective study of pregnant patients admitted Department of Obstetrics and Gynecology during the period between 1\9\2012 and 1\9\2013. These patients had regular
menstrual information and were in 37th week or more of gestation and did not have any disease in the mother or fetus affecting the growth of the fetus.
The study included 122 patients regardless of the mode of delivery. Each patient's information was documented: estimated gestational age by LMP (last menstrual period) and estimated gestational age by ECHO using (BPD : biparietal diameter, FL: femur length) during the 24-hour from delivery, presentation and amount of liquid by ECHO. Gestational age ranged between 37 and 41.5 weeks "with an average of 38.6 weeks" and a standard deviation of 1.1 weeks" by LMP.
Results showed almost convergent values based on all BPD and FL. There was also a stronger correlation between the ages of pregnancy estimated FL, LMP than BPD, LMP. Moreover, there was presence of a strong correlation between the ages of pregnancy estimated using BPD, FL and LMP when the presentation was breech. It was also observed that the presence of a good amount of liquid is necessary to estimate the age pregnancy ultrasound.
Breast cancer is the second leading cause of death of women in the world. The early detection gives a
better chance to cure it. Physicians diagnose breast tumors by analyzing the characteristics of the lesion in
ultrasound images. Shape data, provi
ded by a tumor contour, is important to physicians in making
diagnostic decisions. However, due to the increasing use of technology in medicine, a computer aided
detection systems (CAD) have been built to help the expert. This research focuses on using a level-set
method as an effective lesion segmentation method for breast ultrasound images. By applying non-local
means filter on image, the unwanted speckle noise will be removed and the image's important details will
be preserved. Then the initial contours are sketched using the GUI in order to apply level-set method
which delineates the contour of the lesion in breast ultrasound image. The proposed method was found to
determine the breast tumor contours that are very similar to manual-sketched contours (about 96%).
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