The effect of high UV radiation exposure environment on the novel PVC polymers

2019 ◽  
Vol 26 (10) ◽  
pp. 9945-9954 ◽  
Author(s):  
Emad Yousif ◽  
Dina S. Ahmed ◽  
Ahmed A. Ahmed ◽  
Ayad S. Hameed ◽  
Safaa H. Muhamed ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Uv Radiation ◽  
The Novel

Morphological and Photodecomposition Rate Constant Study of PVC Films Doped with Sulfadiazine Tin(IV) Complexes

2020 ◽  
Vol 14 (2) ◽  
pp. 88
Author(s):  
Emad Yousif
Keyword(s):  
Radiation Exposure ◽  
Uv Radiation ◽  
Rate Constant ◽  
Experimental Results

This article focus on the calculation of photodecomposition rate constant of PVC films that containing sulfadiazine tin(IV) complexes 1-3 as photostabilzers during UV radiation exposure. This constant calculated as a method for evaluating the efficiency of sulfadiazine tin(IV) complexes 1-3 when used as a PVC photostabilizers after 300 hours of irradiation. The experimental results showed that sulfadiazine tin(IV) complexes 1-3 have reduced the rate of photodecomposition constant value of PVC films significantly with comparison to PVC (blank).

scholarly journals The aiming device for cervical distractor pin insertion: a proof-of-concept, feasibility study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Torphong Bunmaprasert ◽  
Sittichai Luangkittikong ◽  
Menghong Tosinthiti ◽  
Supachoke Nivescharoenpisan ◽  
Raphi Raphitphan ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Feasibility Study ◽  
Vertebral Body ◽  
The Novel ◽  
Cervical Lordosis ◽  
Proof Of Concept ◽  
Entry Points ◽  
Free Hand Technique ◽  
Anterior Discectomy And Fusion ◽  
Vertebral Endplates

Abstract Background Restoration of cervical lordosis after anterior discectomy and fusion is a desirable goal. Proper insertion of the vertebral distraction or Caspar pin can assist lordotic restoration by either putting the tips divergently or parallel to the index vertebral endplates. With inexperienced surgeons, the traditional free-hand technique for Caspar pin insertion may require multiple insertion attempts that may compromise the vertebral body and increase radiation exposure during pin localization. Our purpose is to perform a proof-of-concept, feasibility study to evaluate the effectiveness of a pin insertion aiming device for vertebral distraction pin insertion. Methods A Smith-Robinson approach and anterior cervical discectomy were performed from C3 to C7 in 10 human cadaveric specimens. Caspar pins were inserted using a novel pin insertion aiming device at C3-4, C4-5, C5-6, and C6-7. The angles between the cervical endplate slope and Caspar pin alignment were measured with lateral cervical imaging. Results The average Superior Endplate-to-Caspar Pin angle (SE-CP) and the average Inferior Endplate-to-Caspar Pin angle (IE-CP) were 6.2 ± 2.0° and 6.3 ± 2.2° respectively. For the proximal pins, the SE-CP and the IE-CP were 4.0 ± 1.1°and 5.2 ± 2.4° respectively. For the distal pins, the SE-CP and the IE-CP were 7.7 ± 1.4° and 6.2 ± 2.0° respectively. No cervical endplate violations occurred. Conclusion The novel Caspar pin insertion aiming device can control the pin entry points and pin direction with the average SE-CP and average IE-CP of 6.2 ± 2.0° and 6.3 ± 2.2°, respectively. The study shows that the average different angles between the Caspar pin and cervical endplate are less than 7°.

Extractives relating to heartwood color changes in sugi (Cryptomeria japonica) by a combination of smoke-heating and UV radiation exposure

2003 ◽  
Vol 49 (2) ◽  
pp. 135-139 ◽  
Author(s):  
F. Ishiguri ◽  
S. Maruyama ◽  
K. Takahashi ◽  
Z. Abe ◽  
S. Yokota ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Uv Radiation ◽  
Cryptomeria Japonica ◽  
Color Changes

scholarly journals Youth Access to Artificial UV Radiation Exposure

2009 ◽  
Vol 145 (9) ◽  
Author(s):  
Latrice C. Pichon ◽  
Joni A. Mayer ◽  
Katherine D. Hoerster ◽  
Susan I. Woodruff ◽  
Donald J. Slymen ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Uv Radiation ◽  
Artificial Uv

scholarly journals Development of Novel Real-Time Radiation Systems Using 4-Channel Sensors

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2741
Author(s):  
Yohei Inaba ◽  
Masaaki Nakamura ◽  
Masayuki Zuguchi ◽  
Koichi Chida
Keyword(s):  
Radiation Exposure ◽  
Dose Rate ◽  
Real Time ◽  
Angular Dependence ◽  
The Novel ◽  
Medical Radiation ◽  
Dose Linearity ◽  
Tissue Injuries ◽  
Low Sensitivity ◽  
Shape And Size

Radiation-related tissue injuries after medical radiation procedures, such as fluoroscopically guided intervention (FGI), have been reported in patients. Real-time monitoring of medical radiation exposure administered to patients during FGI is important to avoid such tissue injuries. In our previous study, we reported a novel (prototype) real-time radiation system for FGI. However, the prototype sensor indicated low sensitivity to radiation exposure from the side and back, although it had high-quality fundamental characteristics. Therefore, we developed a novel 4-channel sensor with modified shape and size than the previous sensor, and evaluated the basic performance (i.e., measured the energy, dose linearity, dose rate, and angular dependence) of the novel and previous sensors. Both sensors of our real-time dosimeter system demonstrated the low energy dependence, excellent dose linearity (R2 = 1.0000), and good dose rate dependence (i.e., within 5% statistical difference). Besides, the sensitivity of 0° ± 180° in the horizontal and vertical directions was almost 100% sensitivity for the new sensor, which significantly improved the angular dependence. Moreover, the novel dosimeter exerted less influence on X-ray images (fluoroscopy) than other sensors because of modifying a small shape and size. Therefore, the developed dosimeter system is expected to be useful for measuring the exposure of patients to radiation doses during FGI procedures.

The implications of solar UV radiation exposure for fish and fisheries

2001 ◽  
Vol 2 (3) ◽  
pp. 250-260 ◽  
Author(s):  
Horacio E Zagarese ◽  
Craig E Williamson
Keyword(s):  
Radiation Exposure ◽  
Uv Radiation ◽  
Solar Uv Radiation ◽  
Solar Uv

Research on Solid Nanocluster NaXe for Making Micro-Excimer Laser

2017 ◽  
Vol 896 ◽  
pp. 9-12 ◽  
Author(s):  
Jia Chang Liang ◽  
Zhi Liu ◽  
Ting Jian Dong ◽  
Bo Liu ◽  
Dong Yan Chen ◽  
...  
Keyword(s):  
Excited State ◽  
Excimer Laser ◽  
Uv Radiation ◽  
Ground State ◽  
The Novel

The novel solid NaXe nanoclusters were prepared. Measurements and calculations indicated that solid NaXe nanocluster has easily vibration- dissociated ground state and stable excited state to emit UV radiation. In the meanwhile the solid nanocluster NaXe retains fcc position within the host NaCl matrix. Therefore，the integrated ultraviolet(UV)-micro-excimer-laser-matrix can be prepared by using solid NaXe nanoclusters.

scholarly journals Efficacy and safety of a novel personalized navigation template in proximal femoral corrective osteotomy for the treatment of DDH

2020 ◽  
Author(s):  
qiang shi ◽  
Deyi Sun
Keyword(s):  
Radiation Exposure ◽  
Corrective Osteotomy ◽  
Operation Time ◽  
Conventional Group ◽  
The Novel ◽  
Efficacy And Safety ◽  
Reduce Radiation Exposure ◽  
Surgical Methods ◽  
Significant Difference ◽  
Navigation Template

Abstract Background: This present study is aimed to retrospectively evaluate the efficacy and safety of a novel personalized navigation template in proximal femoral corrective osteotomy for the treatment of DDH.Methods: Twenty-nine consecutive patients with DDH who underwent proximal femoral corrective osteotomy were evaluated between August 2013 and June 2017. Based on the different surgical methods, they were divided into the conventional group (n = 14) and navigation template group (n = 15). The osteotomy degrees, radiation exposure, and operation time were compared between the two groups.Results: No major complications relating to osteotomy surgery such as redislocation or avascular necrosis occurred in the navigation template group, which had more accurate osteotomy degrees, less radiation exposure, and shorter operation time when compared with the conventional group (P<0.05). Moreover, there was significant difference according to the McKay criteria between the two groups (P=0.0362).Conclusions: The novel personalized navigation template in proximal femoral corrective osteotomy is effective and safe, which could improve the femoral osteotomy accuracy, reduce radiation exposure, and shorten operation time.

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