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Age at Diagnosis in Bladder Cancer: Does Opium Addiction Play a Role?
Karbakhsh, Mojgan,Dabbagh, Najmeh,Shabani, Azadeh,Tabibi, Ali,Akhavizadegan, Hamed Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.8
Background: Bladder cancer is a major health problem, especially among men. Opium addiction can be an important risk factor. One important question is whether it can affect the age of onset of bladder cancer. We performed this study to evaluate this question. Materials and Methods: In a cross-section study, records of patients diagnosed with bladder carcinoma in Shahid Labbafinejad Medical Center, within 1999-2008 were included. Data were extracted from records regarding age at onset, gender, smoking status, and opioid addiction and analyzed with SPSS 13. Results: Within 10 years, 920 cases were diagnosed with bladder cancer of which 97 percent were transitional cell carcinoma. In 698 cases, opium addiction status was recorded in 21.3% (n=149). Age at diagnosis was $59.7{\pm}11.51$ (median: 60) among opioid addicts which was significantly lower than nonaddicts ($63.1{\pm}13.65$, Median: 65) (P<0.001). Conclusions: Opium addiction can decrease the age of onset of bladder cancer.
Seongmin Ma,JaeTae Seo,A. Jackson,B. Tabibi,H. Brown,K. Lee,L. Creekmore,M. Namkung,Q. Yang,R. Battle,S. S. Jung,T. Skyles,W. Yu 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.6
Single beam femtosecond Z-scan spectroscopy at 775 nm revealed that the effective third-order nonlinear susceptibility and hyperpolarizability of CdSe colloidal nanocrystals near the Bohr radius were 0.7 . 1.0 × 10.22 m2/V2 and 0.18 . 2.0 × 10.44 m5/V2, respectively. The non-resonant nonlinearity increase for CdSe colloidal quantum dots with bigger than average diameters is attributed to their absorption cross-section being larger and their bandgap energy being narrower than those of the quantum dots with smaller sizes.
Large Optical Nonlinearity of Highly Porous Silica Nanoaerogels in the Nanosecond Time Domain
JaeTae Seo,A. Jackson,B. Tabibi,H. Brown,K. Lee,K. P. Yoo,L. Creekmore,M. Namkung,Q. Yang,R. Battle,S. M. Ma,S. S. Jung,S. Y. Kim,T. Skyles 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.6
The nonlinear optical properties of highly porous silica nanoaerogels with a 0.1 g/cm3 apparent density were investigated using a spatially Gaussian shaped, 8 ns pulsed laser operating at a wavelength of 532 nm with a repetition rate of 10 Hz. Closed Z-scan spectroscopy revealed the negative nonlinearity (or defocusing effect) of the silica nanoaerogels. The third-order nonlinear susceptibility of silica nanoaerogels was estimated to be 9.6 × 10.19 m2/V2 (6.9 × 10.11 esu) from degenerate four-wave mixing measurements. The nonlinear transmittance limiting threshold of silica nanoaerogels was 17 MW/cm2.F
Light-Induced Dispersion in Noninstantaneous Response Nonlinear Optical Materials
Qiguang Yang,JaeTae Seo,A. Jackson,B. Tabibi,H. Wang,M. Namkung,S. M. Ma,S. S. Jung,T. Skyles 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.6
The light-induced dispersion in noninstantaneous response third-order nonlinear optical materials has been investigated in this work. We find, even far away from resonance, both normal and abnormal dispersions can be generated in third-order nonlinear optical materials, that possess large third-order nonlinearity and finite response time. The large third order nonlinearity and the finite response time are due to the highly dispersive coupling among the pump and the probe beams. This phenomenon may be used to control the group velocity of a light pulse.
Emerging Zoonoses: the "One Health Approach"
Rabozzi, Giulia,Bonizzi, Luigi,Crespi, Eleonora,Somaruga, Chiara,Sokooti, Maryam,Tabibi, Ramin,Vellere, Francesca,Brambilla, Gabri,Colosio, Claudio Occupational Safety and Health Research Institute 2012 Safety and health at work Vol.3 No.1
Zoonoses represent a public health risk recently pointed out by the spreading of previously unknown human infectious diseases emerging from animal reservoirs such as severe acute respiratory syndrome and avian influenza caused by H5N1-virus. These outbreaks have shown that animal breeding activities can pose a significant public health risk. Until now, the risk of zoonoses has probably been underestimated, particularly in occupational settings. The emergence or re-emergence of bacterial (Mycobacterium bovis and Brucella spp) or viral (hepatitis E virus) infections shows that zoonoses should be considered as emerging risks in agricultural and animal breeding and should be addressed by specific preventive interventions. Close cooperation and interaction between veterinarians, occupational health physicians and public health operators is necessary, for a worldwide strategy to expand interdisciplinary collaborations and communications in all aspects of health care for humans, animals and the environment. This is what the One Health Approach was intended to be.
Yang, Q,Battle, R,Zhang, C,Ma, S M,Seo, J T,Tabibi, B,Temple, D,Sun, S,Jung, S S,Namkung, M American Scientific Publishers 2009 Journal of nanoscience and nanotechnology Vol.9 No.2
<P>The third-order nonlinearity of a PPV-based nanostructured supramolecular organic semiconductor (DBAB), with an electron donor (D) connected to an electron acceptor (A) via nonconjugated and flexible bridge (B) units, was investigated in this work at both near-resonant (532 nm) and nonresonant (1064 nm) wavelength by using degenerate four-wave mixing. The second hyperpolarizabilities of D, A, and DBAB at 532 nm were found to be approximately 2.42 x 10(-43) m2/V2, 7.75 x 10(-44) m2/V2, and 1.80 x 10(-43) m2/V2 in copolarization geometry, and approximately 1.59 x 10(-43) m2/V2, 2.59 x 10(-44) m2/V2, and 1.18 x 10(-43) m2/V2 in orthogonal polarization geometry, respectively. The second hyperpolarizabilities of DBAB at 1064 nm were approximately 1.66 x 10(-46) m2/V2 and approximately 8.77 x 10(-47) m2/V2 for parallel and orthogonal polarization cases.</P>
Nonlinear optical properties of mushroom-shaped CdSe/CdS coreshells.
Ma, S M,Seo, J T,Yu, W,Yang, Q,Tabibi, B,Temple, D,Namkung, M,Heo, J,Kim, W J,Jung, S S American Scientific Publishers 2009 Journal of nanoscience and nanotechnology Vol.9 No.2
<P>The third-order nonlinear optical susceptibilities of mushroom-shaped CdSe/CdS coreshells as a function of concentration have been investigated using polarization- and concentration-resolved degenerate four-wave mixing in a resonant region. The effective third-order nonlinear optical susceptibilities, /chi(3)xxxx/ and /chi(3)xyyx/ of CdSe/CdS coreshells were estimated to be approximately 1.86 x 10(-21)-1.03 x 10(-20) m2/V2, and approximately 0.45 x 10(-21)-6.15 x 10(-21) m2/V2, respectively, for various concentrations of approximately 0.64 x 10(-3)-4.95 x 10(-3) mol/m3. The second hyperpolarizabilities, /<gammah>xxxx/ and /<gammah>xyyx/, of CdSe/CdS coreshells were extracted to be approximately 2.37 x 10(-41) m5/V2 and approximately 1.29 x 10(-41) m5/V2, respectively.</P>