A thermophilic Bacillus strain ASU7 was isolated from soil sample collected from Assiut governorate in Upper Egypt on latex rubber-containing medium at 45 °C. Genetically, the 16S bacterial ribosomal RNA gene of the strain ASU7 was amplified by the polymerase chain reaction (PCR) and sequenced. The sequence of the PCR product was compared with known 16S rRNA gene sequences in the GenBank database. Based on phylogenetic analyses, strain ASU7 was identified as Bacillus amyloliquefaciens. The strain was able to utilize Ficus elastica rubber latex as a sole source for carbon and energy. The ability for degradation was determined by measuring the increase in protein content of bacterium (mg/g dry wt), reduction in molecular weight (g/mol), and inherent viscosity (dl/g) of the latex. Moreover, the degradation was also confirmed by observing the growth of bacterium and formation of aldehyde or keto group using scanning electron microscopy (SEM) and shiff's reagent, respectively.

This paper presents U–Pb ID-TIMS geochronological data from granitoids in the Hafafit area in the Central and South Eastern Desert, Egypt. It dates several Neoproterozoic magmatic pulses and metamorphic events, and constrains one episode of U, Nb and Ta mineralisation along the Nugrus Shear Zone, part of the Eastern Desert Shear Zone, to 608±1 Ma. The data testify to the localized nature of deformation in the Eastern Desert, illustrating that previous subdivisions of granitoids into “Older” and “Younger” based on field criteria are inadequate. With robust ages fromgranitoids in theMeatiq, El Sibai and El Shalul areas the newages indicate 6 pulses of magmatism and/or metamorphism at (1) 705–680, (2) c. 660, (3) 635–630, (4) 610–604, (5) 600–590 and (6) c. 540 Ma. Most pulses are defined by ages from granitoids in both gneiss windows/domes and in the overlying eugeoclinal allochthon; the two tiers represent different crustal levels of related rocks. We propose that pulses 1–3 are syn-orogenic, pulses 4 and 5 reflect exhumation of mid-crustal gneisses along the Eastern Desert Shear Zone, whereas the final pulse post-dates the East African orogeny. Based on available data we propose that the tectono-magmatic evolution above applies to the entire Eastern Desert.

The free convective heat transfer to the power-law non-Newtonian flow from a vertical plate in a porous medium saturated with nanofluid under laminar conditions is investigated. It is considered that the non-Newtonian nanofluid obeys the mathematical model of power-law. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The partial differential system governing the problem is transformed into an ordinary system via a usual similarity transformation. The numerical solutions of the resulting ordinary system are obtained. These solutions depend on the power-law index n, Lewis number Le, buoyancy-ratio number Nr, Brownian motion number Nb, and thermophoresis number Nt. For various values of n and Le, the effects of the influence parameters on the fluid behavior as well as the reduced Nusselt number are presented and discussed.

The free convective heat transfer to the power-law non-Newtonian flow from a vertical plate in a porous medium saturated with nanofluid under laminar conditions is investigated. It is considered that the non-Newtonian nanofluid obeys the mathematical model of power-law. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The partial differential system governing the problem is transformed into an ordinary system via a usual similarity transformation. The numerical solutions of the resulting ordinary system are obtained. These solutions depend on the power-law index n, Lewis number Le, buoyancy-ratio number Nr, Brownian motion number Nb, and thermophoresis number Nt. For various values of n and Le, the effects of the influence parameters on the fluid behavior as well as the reduced Nusselt number are presented and discussed.

This work is focused on the study of the natural convection boundary-layer flow over a downward-pointing vertical cone in a porous medium saturated with a non-Newtonian nanofluid in the presence of heat generation or absorption. The transformed boundary layer governing equations are solved numerically. The influences of pertinent parameters such as the heat generation or absorption, the solid volume fraction of nanoparticles and the type of nanofluid on the flow and heat transfer rate in terms of Nusselt number are discussed. Comparisons with previously published work on special cases of the problem are performed and found to be in excellent agreement. The generalized governing equations derived in this work can be applied to different cases of non-Newtonian fluids with different values of the power-law viscosity index. The results of this parametric study are shown graphically and the physical aspects of the problem are highlighted and discussed.

This work is focused on the study of the natural convection boundary-layer flow over a downward-pointing vertical cone in a porous medium saturated with a non-Newtonian nanofluid in the presence of heat generation or absorption. The transformed boundary layer governing equations are solved numerically. The influences of pertinent parameters such as the heat generation or absorption, the solid volume fraction of nanoparticles and the type of nanofluid on the flow and heat transfer rate in terms of Nusselt number are discussed. Comparisons with previously published work on special cases of the problem are performed and found to be in excellent agreement. The generalized governing equations derived in this work can be applied to different cases of non-Newtonian fluids with different values of the power-law viscosity index. The results of this parametric study are shown graphically and the physical aspects of the problem are highlighted and discussed.

The effect of yield stress on the free convective heat transfer of dilute liquid suspensions of nanofluids flowing on a vertical plate saturated in porous medium under laminar conditions is investigated considering the nanofluid obeys the mathematical model of power-law. The model used for non-Newtonian nanofluid incorporates the effects of Brownian motion and thermophoresis. The governing boundary- layer equations are cast into dimensionless system which is solved numerically using a deferred correction technique and Newton iteration. This solution depends on yield stress parameter Ω, a power-law index n, Lewis number Le, a buoyancy-ratio number Nr, a Brownian motion number Nb, and a thermophoresis number Nt. Analyses of the results found that the reduced Nusselt and Sherwood numbers are decreasing functions of the higher yield stress parameter for each dimensionless numbers, n and Le, except the reduced Sherwood number is an increasing function of higher Nb for different values of yield stress parameter.

NMOR can be formed endogenously from nitrite and morpholine. Oxidative damage may represent an important step in the toxicity of NMOR. This study was designed to evaluate the biological activity of 3-aminothiazolo[3.2a]benzimadzole-2-carbonitrile in the protection of hepatic and renal tissues against oxidative stress that is induced by administration of nitrite and morpholine as food additives in drinking water for 15 weeks. Conclusions: Nitrite plus morpholine administration to rats results in oxidative damage in hepatic and renal tissues. This damage may return to the increased production of ROS and changes in the levels of antioxidants. This oxidative damage was ameliorated by DMSO and 3-aminothiazolo[3.2a]benzimadzole-2-carbonitrile co-treatment.

Cisplatin (CP) is considered as a major antineoplastic drug against a broad spectrum of malignancies. CP acts on cancer cells by releasing free radicals which at the same time damage liver and kidney cells. In this study, we aimed to investigate the hepatotoxicity of CP which it may be mediated by oxidative stress and to establish whether some antioxidants, Vit C, DPPD and L-cystiene, may provide protection against CP hepatotoxicity. 40 rats were divided into 5 groups. G1 work as control, G2 injected with CP alone, G3 was injected with CP & Vit C, G4 was injected with CP& DPPD, G5 was injected with CP & L-cystiene. CP-induced oxidative stress was indicated by ↑ LPO and O2- in hepatic tissue and plasma. Also, CP induced decline of SOD, CAT, GST and GGT and a ↓ level of GSH, Vit C and Vit E in hepatic tissue and plasma. Treatment with Vit C, DPPD and L-cysteine in combination with CP restored LPO and O2-, the activities of SOD, GST, CAT and GGT and the content of GSH, Vit C and Vit E to control levels