DD-dimensional Bardeen-AdS black holes in Einstein-Gauss-Bonnet theory

We present a $D$-dimensional Bardeen like Anti-de Sitter (AdS) black hole solution in Einstein-Gauss-Bonnet (EGB) gravity, \textit{viz}., Bardeen-EGB-AdS black holes. The Bardeen-EGB-AdS black hole has an additional parameter due to charge ($e$), apart from mass ($M$) and Gauss-Bonnet parameter ($\alpha$). Interestingly, for each value of $\alpha$, there exist a critical $e = e_E$ which corresponds to an extremal regular black hole with degenerate horizons, while for $e< e_E$, it describes non-extremal black hole with two horizons. Despite the complicated solution, the thermodynamical quantities, like temperature ($T$), specific heat($C$) and entropy ($S$) associated with the black hole are obtained exactly. It turns out that the heat capacity diverges at critical horizon radius $r_+ = r_C$, where the temperature attains maximum value and the Hawking-Page transition is achievable. Thus, we have an exact $D$-dimensional regular black holes, when evaporates lead to a thermodynamical stable remnant.Comment: 25 pages, 48 figure

Sterilization and Disinfection of Extracted Human Teeth for Institutional Use

Objective: The study was done to determine the various effective methods of sterilization in extracted human teeth. Materials &amp; methods: 80 non carious molar teeth were extracted due to periodontal disease and used to determine the effectiveness of different disinfection, sterilization method of using bacillus subtilis, a spore bearing thermo resistant bacteria frequently used to test sterilizers. The teeth were collected and stored in normal buffered saline. 10 teeth were placed in each of 8 groups.&nbsp; 7 groups with 10 teeth were immersed in 5% Naocl, 2.5 % Naocl,, 10 % formalin, 3 % H2O2, 2% gluteraldehyde, 3% hypochlorite solution and autoclaving at 1210C, 16 lbs pressure for 20 minutes respectively and last was immersed with normal saline as control ,subsequently incubated for 7 days at 370c in blood agar, mackonkey agar, nutrient agar before and after treatment for 48 hrs. The plates were examined before treatment and after treatment for growth of Bacteria. Result: It was found that autoclaving at 1210C for 20 minutes at 16 lbs pressure, 10 % formalin, 3 % sodium hypochlorite solution was 100% effective. Conclusion: It was concluded that formalin, hypochorite, autoclaving was the choice of sterilization of human extracted teeth for institutional use

Preterm vaginal en caul delivery in a case of severe oligohydramnios with pyelonephritis

En caul deliveries are very rare and are associated with prematurity. Approximately 40 percent of spontaneous premature births are thought to be caused by infection.  Preterm along with oligohydramnios can lead to en caul delivery. We report a case of 27-year-old gravida 4 multiparous women with a history of 2 normal vaginal deliveries NSVD and 1 spontaneous abortion, who presented at 32 weeks of gestation in active labour and delivered preterm viable female with an intact placenta contained within the amniotic sac as a unit “en caul.” Since the patient gave a history of lower back pain with burning micturition for 1 month which remained consistent after delivery, ultrasonography whole abdomen was done and bilateral pyelonephritis was diagnosed. However, the baby’s sepsis screen was negative and discharged healthy.  We report this case because of its rarity of occurrence and to show that intact amniotic membrane during birth can protect the baby from birth trauma and infections

Keratinous Materials as Novel Absorbent Systems for Toxic Pollutants

A range of hazardous organic and inorganic compounds, and metal ions generated by human and industrialactivities leads to serious concerns for environments. Adsorption technologies based on polymeric materials are beingused to remove toxic substances from air and wastewater streams. Keratin protein, found abundantly in sheep’s wool,human hair and bird feathers, is an interesting and potentially useful renewable biopolymer. It contains a variety offunctional groups on the backbone and side chains of the proteins, and is an ideal component to fabricate a rangeof novel adsorbent systems for separation of toxic pollutants via physisorption or chemisorption mechanisms. Inthis review article, the key activities on keratin research and development with respect to the novel properties ofkeratin proteins and their utilization as absorbents or filtration systems are summarized. It is apparent that keratinsin the form of loose fibers, non-woven fabrics, short fibers or particles, membranes and colloids can be used as absorbents for air filtration and wastewater treatment. Keratin materials have potential to be applied in biological and chemical defence applications, and also in protection against radioactive elements.Defence Science Journal, Vol. 64, No. 3, May 2014, pp. 209-221, DOI:http://dx.doi.org/10.14429/dsj.64.731

Cleavage of Ge–S and C–H bonds in the reaction of electron-deficient [Os₃(CO)₈(μ-H)(μ₃-Ph₂PCH₂P(Ph)C₆H₄)] with Ph₃GeSPh: Generation of thiophenol derivatives [Os₃(CO)₈(μ-H)(μ-SPh)(μ-dppm)] and [Os₃(CO)₇(μ-H)(μ-SPh)(μ₃-SC₆H₄)(μ-dppm)]

Heating the electron-deficient [Os₃(CO)₈(μ-H)(μ₃-Ph₂PCH₂P(Ph)C₆H₄)] (1) and Ph₃GeSPh in benzene at 80 °C led to the thiolato bridged compounds, [Os₃(CO)₈(μ-H)(μ-SPh)(μ-dppm)] (2) and [Os₃(CO)₇(μ-H)(μ-SPh)(μ₃-SC₆H₄)(μ-dppm)] (3), formed by cleavage of Ge–S and C–S bonds of the ligand, in 40% and 17% yields, respectively. Both compounds 2 and 3 have been characterized by a combination of elemental analysis, infrared and ¹H NMR spectroscopic data together with single crystal X-ray crystallography. Compound 3 contains an open triangle of osmium atoms bridged by a SPh and SC₆H₄ ligands on opposite sides of the cluster with a dppm ligand bridging one of the Os–Os edges. Compound 2 consists of a closed triangular cluster of osmium atoms with a bridging SPh, and a bridging hydride ligand on the same Os–Os edge, and a dppm ligand bridging one of the remaining Os–Os edges