Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userدراسة ضوء الليزر CO2 في البلورات اللاخطية GaAs
798
0 9
0
(
0
)
Added by
Damascus University ورقة بحثية
Publication date
2001
fields
Physics
and research's language is
العربية
Authors
هاني محمود شعبان( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
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 .
No English abstract
References used
C. K. N. PATEL. SELECTIV EXCITATION THROUGH VIBRATIONAL ENERGY TRANSFER AND OPTCAL MASER IN N٢-CO٢ PHY. REV. LETT
T. H. MAIMAN, OPTICAL AND MICROWAVE-OPTICAL EXPERIMENTS IN RUBY PHYS. REV. LETT
rate research
Read More
Human gingival pigmentation cause esthetic problems and
embarrassment, especially in women and patients with a gummy smile.
This study was performed to see the effect and the clinical influence
of CO2 laser on pigmented gingiva. This new technique
performed for the
first time in Syria.
Objective: to study and evaluate the surgical operative process in the management of
Benign Tumors and Leukoplakia in the Oral Cavity by using Laser CO2.
Materials and methods: a total of 18 patients (10 males and 8 females) with mean age
50 years
, and diagnosed with Benign tumorous Lesions or Leukoplakia on mucosa of the
oral cavity, were treated by Vaporization by using CO2 Laser in Al-Assad university
hospital. The postoperative complications were recorded within 7 days after the surgery,
and the wounds was assigned until entire healing.
Results: 8(44%) patients had week pain after 24 hour of surgery, and reduced to
2(11%) patients in the third day. Edema was seen by 8(44%) patients after 24 hour of
surgery, and reduced to 1(6%) patient in the third day.5 (28%) patients showed disturbance
within oral functions, and became 1(6%) patient in the third day. No complications were
seen after 7 days of surgery. No infection or bleeding were recorded within following
time.no statistically significant differences between Lesion kind and pain degree, and no
relationship between Pain degree and Disturbance of the Lesions. Entire healing was
satisfactory in all Wounds and no scar were seen .
Conclusion: CO2 Laser is effective method in manage and minimize the
complications during Healing process after the management of Benign Tumors and
Leukoplakia in oral cavity.
This research could be considered as a continuous study of luminescence spectrum of praseodymium cascade photon emission Pr3+ of 1% ions effect on Li2YB5O10 and LaF3 crystals. The Li2YB5O10 crystal shows many spectrum peaks, mainly of 272nm and 300nm
wavelengths of luminescence decay τ=10.6 ns. The other crystal LaF3 shows two sharp spectrums of 478.6nm and 485.5nm wavelengths, which are due to the energetic transitions of 3P0→3H4 of luminescence decay τ=1.8 ns. This study proves that these two crystals exhibit good luminescence properties as promising compounds for laser and medical equipments to be used in radiation detectors and other research domains.
The measurements were done in Tech-governmental University of Petersburg, Russia, 2008.
In this work, theoretical calculation of the ground and excited state of
coumarin compounds are performed using DFT-B3LYP and CIS methods with
6-31G basis set. IR spectrum, UV/Vis spectrum, molecular orbitals and energy
gap are calculated. We use
different solvents ethanol, methanol, water,
acetonitrile (ACN), dimethyl sulfoxide (DMSO), acetone, and dichloromethane
to compare values of UV/Vis absorption spectra. Then the calculated results are
compared with the experimental values.
In this paper, the seasonal variations of CO2 system and pH
values in surface seawater of Banias city are shown during the
period in spring 2015 and winter 2016, in addition to determine the
impact of hydrological factors.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
