Effect of Neem Oil on Sperm Mitochondrial Activity

It is a known fact that neem oil has some effect on motility of sperm. Motility of sperm depends on mitochondrial activity present in mid-piece of sperm. In the present study, the mitochondrial activity of sperm was evaluated after treating semen with the different quantities of neem oil. The mitochondrial activity was also evaluated after subjecting the semen samples for different incubation periods keeping the quantity of semen as well as that of neem oil same. Tests were done on thirty normozoospermic semen samples with motile score more than 75%. It was found that as the quantity of neem oil increases, the mitochondrial activity decreases significantly (P < 0.001). Similar results were found, when same quantity of neem oil was treated with same quantity of semen, but incubating for different time durations. The mitochondrial activity decreases significantly (P < 0.001) from one minute to twenty minutes. So, it indicates that as the contact period between neem oil and semen increases the mitochondrial activity decreases significantl

“STRUCTURAL PROPERTIES OF HOLMIUM DOPED COBALT FERRITE BY STANDARD CERAMIC TECHNIQUE”

Objective: Compositions of CoHoxFe2-xO4 (x = 0.00 and 0.02) was prepared by standard ceramic technique using AR grade CoO2, Ho2O3 and Fe2O3. The samples were characterized by X-ray diffraction technique and the analysis of XRD patterns reveals the formation of single phase cubic spinel structure. The structural parameters like lattice constant (a), x- ray density(dx), bulk density (dB), particle size (t) and porosity (P), tetrahedral and octahedral bondlength (dAX and dBX), the tetrahedral edge (dAXE), and the shared and unshared octahedral edge (dBEX and dBXEU) can be calculated were calculated form XRD data and effect of Ho3+ doped cobalt ferrite was studied. Thus, the rare earth Ho3+ doped cobalt ferrite strongly influences the physical properties of cobalt ferrite. Materials and Methods: Present series was prepared by standard ceramic technique using AR grade CoO2, Ho2O3 and Fe2O3. Results: The XRD pattern shows that both the samples possess single phase cubic spinel structure. No extra peak of Ho3+ is observed for x =0.02 sample. Lattice constant, X-ray density of Ho3+ doped cobalt ferrite is increases than that of pure cobalt ferrite. Conclusion: The rare earth Ho3+ doped cobalt ferrite strongly influences the physical properties of cobalt ferrite

ELECTRICAL CONDUCTION, dielectric BEHAVIOR AND MAGNETOELECTRIC EFFECT IN (1-x) Co1.2Mn0.2Fe1.6O4 + (x) BaTiO3 ME Composites

Objective: Electrical and magnetoelectric properties of magnetoelectric (ME) composites ferroelectric as electric component and a mixed ferrite as magnetic component are reported. The (1-x) Co1.2Mn0.2Fe1.6O4 + (x) BaTiO3 magnetoelectric (ME) composite have been prepared using conventional double sintering ceramic process where x varies as 0.00, 0.25, 0.50, 0.75 and 1.00. The X-ray diffraction pattern of the composites reveals the formation of spinel structure for the piezomagnatic phase and tetragonal perovskite structure for the piezoelectric phase without any other phase formation. The dc resistivity was measured as a function of temperature. The variation of dielectric constant ' dielectric loss ε'' and dielectric loss tangent δ with frequency in the range 1kHz-1MHz was studied. The dielectric constant shows dispersion in the lower frequency region, with almost a constant value at higher frequencies. The magnetoelectric voltage coefficient (dE/dH)H was studied as a function of intensity of the magnetic field. The measured magnetoelectric (ME) response demonstrated strong dependence on the volume fraction of CoMnFe2O4 and the applied magnetic field. A large ME voltage coefficient of about 647 Vcm-1Oe-1 was observed for 25% CoMnFe2O4 + 75% BaTiO3composite. Materials and Methods: The piezoelectric phase Barium Titanate (BaTiO3) was prepared by standard doubling sintering ceramic method using AR grade oxides/carbonate. Barium carbonate (BaCO3) and Titanium-dioxide (TiO2) were taken in molar proportion. Results: The electrical resistivity of ferrite phase is less as compared to the resistivity of ferroelectric material. The resistivity of composites is found to be in between ferrite and ferroelectric. Conclusion: Magneto-electric conversion factor with varying magnetic field shows maxima in the curve at a lower magnetic field and then decreases continuously at higher magnetic field. As ferroelectric content increases both the resistivity and magnetoelectric conversion factor also increases

Priprava i karakterizacija gliklazid-polietilen glikol 4000 čvrstih disperzija

The objective of the present investigation was to study the effect of polyethylene glycol 4000 (PEG 4000) on in vitro dissolution of gliclazide from solid dispersions. Initial studies were carried out using physical mixtures of the drug and carrier. Solid dispersions were prepared by the melting or fusion method. Phase and saturation solubility study, in vitro dissolution of pure drug, physical mixtures and solid dispersions were carried out. PEG was found to be effective in increasing the dissolution of gliclazide in solid dispersions when compared to pure drug. FT-IR spectroscopy, differential scanning calorimetry and X-ray diffractometry studies were carried out in order to characterize the drug in the physical mixtures and solid dispersions. Dissolution enhancement was attributed to decreased crystallinity of the drug and the wetting and solubilizing effect of the carrier from the solid dispersions of gliclazide. In conclusion, dissolution of gliclazide can be enhanced by the use of hydrophilic carrier.U radu je opisan učinak polietilen glikola 4000 (PEG 4000) na in vitro oslobađanje gliklazida iz čvrstih disperzija koje su pripravljene metodom taljenja ili fuzije. Čvrstim disperzijama i fizičkoj smjesi ljekovite tvari i nosača proučavana je topljivost faza i zasićenje te in vitro oslobađanje ljekovite tvari. Rezultati ukazuju da PEG povećava oslobađanje gliklazida u čvrstim disperzijama. Za karakterizaciju fizičkih smjesa i čvrstih disperzija upotrebljena je FT-IR spektroskopija, diferencijalna pretražna kalorimetrija i difraktometrija rendgenskog zračenja. Zaključeno je da je povećanje oslobađanja posljedica vlaženja, smanjene kristaliničnosti i solubilizirajućeg učinka nosača te da se oslobađanje gliklazida može povećati pomoću hidrofilnog nosača

Surface rainwater harvesting potentiality and impact of Dhaval micro-watershed in Satara district, Maharashtra, India

The main objective in constructing the rainwater harvesting structures is to collect and retain the maximum possible amount of runoff generated from its catchment area. If suitable small surface water harvesting structures are taken up systematically on a micro-watershed basis, it is possible to avoid the drought like conditions that prevail in semi-arid regions. The present paper based on the primary data collected by conducting intensive fieldwork and personal interviews. It is found that three main surface water harvesting structures have been constructed. These are - i) Cascade of tanks and contour bunds ii) Networking of farm ponds iii) percolation tank. It is suggested that such surface rainwater harvesting structures should be constructed in a micro-watershed particularly in the drought-prone areas to bring prosperity and development. Key Words: Water harvesting, Potentiality, Micro-watershed, Impact, Sustainable development

String Fluid Cosmological Model with Magnetic Field in Bimetric Theory of Gravitation

In this paper, LRS Bianchi type I string fluid cosmological model with magnetic field in bimetric theory of gravitation is investigated by assuming barotropic equation of state for pressure and density and assuming the bulk viscosity to be inversely proportional to the scalar expansion. The source of energy momentum tensor is a bulk viscous fluid containing one dimensional string with electromagnetic field. The physical and geometrical properties of the model are discussed. The bulk viscosity affected the whole properties of the model

Non-Inflationary Bianchi Type VI0 Model in Rosen’s Bimetric Gravity

In this paper, we have present the solution of Bianchi type VI0 space-time by solving the Rosen’s field equations with massless scalar field φ and with constant scalar potential V(φ) for flat region. It is observed that the scalar field φ is an increasing function of time and affects the physical parameters of the model and leads to non-inflationary type solution of model, which contradicts the inflationary scenario. Other geometrical and physical properties of the model in relation to this non-inflationary model are also studied