Solution of spin-boson systems in one and two-dimensional geometry via the asymptotic iteration method

We consider solutions of the $2\times 2$ matrix Hamiltonian of physical systems within the context of the asymptotic iteration method. Our technique is based on transformation of the associated Hamiltonian in the form of the first order coupled differential equations. We construct a general matrix Hamiltonian which includes a wide class of physical models. The systematic study presented here reproduces a number of earlier results in a natural way as well as leading to new findings. Possible generalizations of the method are also suggested.Comment: 13 pages, 5 figures. Please check "http://www1.gantep.edu.tr/~ozer/" for other studies of Nuclear Physics Group at University of Gaziante

Higher Dimensional Cylindrical or Kasner Type Electrovacuum Solutions

We consider a D dimensional Kasner type diagonal spacetime where metric functions depend only on a single coordinate and electromagnetic field shares the symmetries of spacetime. These solutions can describe static cylindrical or cosmological Einstein-Maxwell vacuum spacetimes. We mainly focus on electrovacuum solutions and four different types of solutions are obtained in which one of them has no four dimensional counterpart. We also consider the properties of the general solution corresponding to the exterior field of a charged line mass and discuss its several properties. Although it resembles the same form with four dimensional one, there is a difference on the range of the solutions for fixed signs of the parameters. General magnetic field vacuum solution are also briefly discussed, which reduces to Bonnor-Melvin magnetic universe for a special choice of the parameters. The Kasner forms of the general solution are also presented for the cylindrical or cosmological cases.Comment: 16 pages, Revtex. Text and references are extended, Published versio

Rapid detection of resistance in Staphylococcus aureus by using Quicolor ES

PMID = 2407249

Demodex spp. Infestation in a breast-cancer patient: A case report

Demodex folliculorum and Demodex brevis are obligatory parasites that live in sebaceous glands and follicles. When immune system becomes suppressed by any reason, patients become vulnerable to obligatory parasites like D. folliculorum and D. brevis. Immune system becomes suppressed in cancer patients who undergo chemotherapy, and as a result these patients become vulnerable to infestations. In our case, a 45 year-old female has been admitted to oncology clinic for a medical treatment of breast cancer. Her systematic physical examination was normal, except redness on her cheeks and forehead. There was no abnormality in biochemical and haematological laboratory values. We have decided to apply chemotherapy of Adriamycin, cyclophosphamide and 5-fluorouracil. Due to the itchy redness on her cheeks and forehead, we had performed an examination for demodex before chemotherapy; and we have identified 20 mites/cm² on her right and left cheeks, and 15 mites/cm² on her forehead. When our patient had came our clinic with increasing complaint of itchy rash, after the first course of chemotherapy we have reexamined demodex. The result of microscopic examination revealed large amount of demodex of 50 mites/cm² on her right and left cheeks and 30 mites/cm² on her forehead, which were nearly 2.5-times higher than the previous examination. This increase probably was associated with immune suppression of chemotherapy.Keywords: Chemotherapy, demodex, infestatio

Curcumin abates formaldehyde-induced neurotoxicity via NO pathway and the change of minerals (calcium, iron, zinc, copper, magnesium) in brain tissue

Oxidative stress has been defined as an imbalance between higher cellular levels of reactive oxygen species (ROS). If ROS are not controlled by enzymatic and non-enzymatic antioxidants, they can cause oxidative injury. Brains are protected by antioxidants from nitro-oxidative and peroxidative damage. The antioxidant enzymes are superoxide dismutase and catalase, which contain zinc (Zn) and copper (Cu) as cofactors. Also, trace elements have important effects on brain development and function. In this study, we aimed to investigate the effect of curcumin administration on the exchange of nitric oxide (NO) and on the calcium (Ca), iron (Fe), Zn, Cu, and magnesium (Mg) levels in brain tissue. Animals (a total of 30 adult Wistar albino rats, 4-6 months old) were randomly divided into three groups (n = 10): control, formaldehyde-exposed, and treated daily with curcumin after formaldehyde exposure (100 mg kg-1). At the end of the experimental period (the 14th day), NO levels were measured by ELISA. Ca, Fe, Zn, Cu, and Mg levels in whole-brain tissues were determined by Atomic Absorption Spectrophotometry in all groups. NO and Mg levels were increased and Cu and Ca levels were decreased in the group treated with curcumin when compared with the formaldehyde-only group. These changes were not statistically significant (P > 0.05). However, Fe levels were significantly reduced and Zn levels were significantly increased (P < 0.05). In conclusion, the administration of curcumin as an antioxidant may be a factor in regulating the mineral balance of the brain in conditions of oxidative stress caused by the application of FA. Curcumin may play a role in reducing FA-induced cellular damage, and may contribute to the treatment of neurodegenerative diseases such as Alzheimer’s and Parkinson’s

Curcumin abates formaldehyde-induced neurotoxicity via NO pathway and the change of minerals (calcium, iron, zinc, copper, magnesium) in brain tissue

Oxidative stress has been defined as an imbalance between higher cellular levels of reactive oxygen species (ROS). If ROS are not controlled by enzymatic and non-enzymatic antioxidants, they can cause oxidative injury. Brains are protected by antioxidants from nitro-oxidative and peroxidative damage. The antioxidant enzymes are superoxide dismutase and catalase, which contain zinc (Zn) and copper (Cu) as cofactors. Also, trace elements have important effects on brain development and function. In this study, we aimed to investigate the effect of curcumin administration on the exchange of nitric oxide (NO) and on the calcium (Ca), iron (Fe), Zn, Cu, and magnesium (Mg) levels in brain tissue. Animals (a total of 30 adult Wistar albino rats, 4-6 months old) were randomly divided into three groups (n = 10): control, formaldehyde-exposed, and treated daily with curcumin after formaldehyde exposure (100 mg kg-1). At the end of the experimental period (the 14th day), NO levels were measured by ELISA. Ca, Fe, Zn, Cu, and Mg levels in whole-brain tissues were determined by Atomic Absorption Spectrophotometry in all groups. NO and Mg levels were increased and Cu and Ca levels were decreased in the group treated with curcumin when compared with the formaldehyde-only group. These changes were not statistically significant (P > 0.05). However, Fe levels were significantly reduced and Zn levels were significantly increased (P < 0.05). In conclusion, the administration of curcumin as an antioxidant may be a factor in regulating the mineral balance of the brain in conditions of oxidative stress caused by the application of FA. Curcumin may play a role in reducing FA-induced cellular damage, and may contribute to the treatment of neurodegenerative diseases such as Alzheimer’s and Parkinson’s