Indian National Association

About: Indian National Association is a based out in . It is known for research contribution in the topics: Aryl & Palladium. The organization has 814 authors who have published 874 publications receiving 7981 citations. The organization is also known as: Indian Association.

Relativistic Cosmology. I

Abstract: The paper presents some general relations obtaining in relativistic cosmology. It appears from these that a simple change over to anisotropy without the introduction of spin does not solve any of the outstanding difficulties of isotropic cosmological models.

Carbon Nanoparticle-based Fluorescent Bioimaging Probes

Abstract: Fluorescent nanoparticle-based imaging probes have advanced current labelling technology and are expected to generate new medical diagnostic tools based on their superior brightness and photostability compared with conventional molecular probes. Although significant progress has been made in fluorescent semiconductor nanocrystal-based biological labelling and imaging, the presence of heavy metals and the toxicity issues associated with heavy metals have severely limited the application potential of these nanocrystals. Here, we report a fluorescent carbon nanoparticle-based, alternative, nontoxic imaging probe that is suitable for biological staining and diagnostics. We have developed a chemical method to synthesise highly fluorescent carbon nanoparticles 1–10 nm in size; these particles exhibit size-dependent, tunable visible emission. These carbon nanoparticles have been transformed into various functionalised nanoprobes with hydrodynamic diameters of 5–15 nm and have been used as cell imaging probes.

Synthesis of a α-Fe2O3 nanocrystal in its different morphological attributes : growth mechanism, optical and magnetic properties

Abstract: Nanospindle and nanorhombohedron and nanocube structured α-Fe2O3 was synthesized by the solvothermal method. An intermixing of ethylenediamine (EN) either with ethanol (EtOH) or water in different volume ratios (either 15:85, 50:50 or 85:15 in particular) was used to generate the structural forms of α-Fe2O3. The study showed that, during synthesis, EN functioned as a ligand and facilitated the growth of nanostructured samples. The probable growth mechanism is discussed in this paper. Field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) investigations revealed that the nanostructures were formed through oriented attachment of primary nanocrystals. Fourier transform infrared spectroscopy (FTIR) results showed the presence of Fe–O or Fe–O–Fe vibrational bands whereas UV–vis–NIR optical absorbance spectra showed two prominent absorption bands around 540–560 and 670–680 nm. The room temperature magnetization measurement revealed that the remanence and coercivity depend on the morphological attributes of the nanocrystals. The magnetic hysteresis measurement also revealed that α-Fe2O3 nanostructures displayed weak ferromagnetic behaviour at room temperature.

3-D ordered mesoporous KIT-6 support for effective hydrodesulfurization catalysts

Abstract: KIT-6 silica with well-ordered 3-D mesoporosity was developed as support for Mo, CoMo and NiMo catalysts. TEM and low-angle XRD analyses were used to ensure that the cubic Ia3d mesostructure is stable after Mo and promoter incorporation. The wide-angle XRD (as well O2-chemisorption analysis) was used to verify MoO3 (and MoS2) dispersion, with crystallite size