Structural and viscosity studies of dendritic hyper branched polymer as viscosity index improvers.

Star-like structural compounds were synthesized from different moles % of either dodecyl acrylate or triethylenetetramine using a one-pot commercial synthesis technique. The polymers that were created had various terminations. Fourier Transform Infrared (FTIR) spectroscopy and HNMR were used to verify the produced polymers' chemical composition with different terminations.

Gamma rays and neutrons attenuation performance of a developed lead borate glass for radiotherapy room.

The development of radiation therapy necessitated a continuous R&D for radiotherapy rooms' glass windows to reach the highest levels of protection for the staff of the radiotherapy facility. Therefore, in this article, a novel type of lead borate glass depending on parallel augmenting of lead and boron was produced to be used as gamma-rays and fast and thermal neutrons barriers in radiotherapy rooms. Neutrons and gamma rays' attenuation parameters, fast neutrons removal cross section ${\varSigma}_R$, thermal neutron total cross section ${\sigma}_T$, mass attenuation coefficient $\sigma$, linear attenuation coefficient μ, half-value layer, mean free path, effective atomic number Zeff, effective electron density Neff, and buildup factor for energy absorption (energy absorption buildup factor) and exposure (exposure buildup factor) were studied extensively.

The association between vitamin D levels and oxidative stress markers in Egyptian Behcet's disease patients.

Background: Oxidative stress is postulated to have a major role in the pathophysiology of Bechet's Disease (BD). Growing evidence suggests that vitamin D has important roles in enhancing the expression of anti-inflammatory cytokines as well as certain antioxidants. However, there is little evidence currently about the antioxidant properties of vitamin D in BD.

Assessment of Radiation Exposure Dose for Nuclear Medicine Workers from F-FDG, Tc MDP, and Tc.

Background: Nuclear medicine or diagnostic radiology personnel are always exposed to low-level radiation from radionuclides used in medical diagnostics, which lead to potential biological hazards or effects.

Objective: External exposure for workers in two nuclear medicine centers was measured by recruiting 120 patients.

Methods: Three nuclear medicine examinations were performed using F18-FDG PET/CT,Tc- MDP bones scan, and Tc thyroid scan by a digital radiation dosimeter.

Genetic polymorphisms of IL-27 and risk of systemic lupus erythematosus disease in the Egyptian population.

Objective: Cytokine polymorphisms have been associated with systemic lupus erythematosus (SLE) pathogenicity. Interleukin 27 (IL-27) is an important one of pro-/anti-inflammatory cytokine. It has been reported in various Th1/Th17-mediated inflammatory disorders, and even in Th2-complexed diseases, such as SLE.