Partícula beta
As partículas β (beta) são eletrões ou positrões de elevada energia cinética emitidos pelos núcleos de certos elementos radioativos (radionuclídeos).
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Obtaining of acrylonitrile fibers by pulsed electrospinning
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Bulk Etch Rate Measurement of Cr-39 Detector at Constant Normality Using The Diameters and The Lengths of The Tracks of Α-Particles
The aim of this paper is to determine the bulk etch rate of Nuclear Track Detector (type CR-39) using the track’s diameter-length (Le-D) measurement method by irradiating the detector with different energies of alpha particles from 241Am source. Constant normality (6.25) N of the chemical solution NaoH at a temperatur…
PENGARUH FORMULASI KITOSAN, TAMARIN DAN VITAMIN C PADA PELET IKAN KOI TERHADAP KUALITAS AIR, BERAT DAN PANJANG IKAN KOI (Cyprinus carpio)
Penelitian ini bertujuan untuk mengetahui pengaruh komposisi dari formulasi tamarin, kitosan, dan Vitamin C sebagai campuran pakan buatan terhadap pertumbuhan berat, panjang dan kualitas air. Penelitian dilakukan di Balai Penelitian Ikan Hias, Depok. Penelitian ini menggunakan 4 perlakuan yang berbeda, yaitu kontrol=…
Изучение физико-химических свойств ферментных систем флокулянта Streptomyces chromogenes s.g. 0832
There are examined properties of enzyme systems of actionomycetes Steptomyces chromogenes s.g. 0832, proposed in bio flocculants role for waste water of meat industry treatment. Experimental data demonstrated that optimal results of effluent treatment are observed at temperature and pH range that coincides with range…
Surface properties of distinct nanofibrillated celluloses assessed by inverse gas chromatography
Abstract The adhesion and surface properties of nanocelluloses are an important issue to consider when using this material for composites production, in food packaging or coatings, as well as for determining the influence of added functional groups. In the present work, the surface properties of two nanofibrillated ce…
Memristive metal-insulator switches in correlated electron oxide nanowires using electric fieldinduced redox reaction
E field-induced metal-insulator transition in correlated electron materials has been attracting much attention as not only a mainstream in a development of oxide electronics but also a platform for investigation of condensed-matter physics. In the common motivation, electric field at gate has been used as accumulation…
Giant photoconductivity in organic materials by UV irradiation
I our group the molecular charge transfer (CT) complexes including photoreactive species such as Ag+, [Ru(bpy)3], and methyl viologen have been widely examined to elucidate their possibility as new types of photoconductors. It is anticipated that utilizing the photoreactive species as a trigger of CT, the counter spec…
Bone-like nanocomposite of hydrxyapatite and collagen as artificial bone
B is a typical nanocomposite mainly composed of carbonate containing non-stoichiometric hydroxyapatite nanocrystals and type-I collagen molecules. They aligned along each other in the primary structure of bone and realize strong but biologically resorbable nature. Our group hypothesized that artificial bone with simil…
Atomic-scale structural characterization of InAs/GaAs based quantum-dot nanostructures
Q technology is a promising route for the realization of high-performance photovoltaic devices. The tuneability of optoelectronic properties of quantum dots makes them applicable for a range of novel device designs that offer power conversion efficiencies well in excess of conventional limits. The optoelectronic perfo…
Functionalized nanomaterials for specific lanthanide separations and nuclear wastewater treatment
crown-6-ether (AcDB20C6) was developed and dibenzo-24-crown-8-ether (DB24C8) and AcDB20C6 (inset)) were directly immobilized onto mesoporous silica for Cs containing wastewater treatment. The AcDB20C6 has an ability to identify the Cs ion size based on cation–π interaction. The π electron of the benzene ring in AcDB20…
Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond
We report on position and density control of nitrogen-vacancy (NV) centres created in type Ib diamond using localised exposure from a helium ion microscope and subsequent annealing. Spatial control to <380 nm has been achieved. We show that the fluorescence lifetime of the created centres decreases with increasing ion…
Layer by layer assembly of graphene and ultrathin vanadium pentoxidecoated MWCNTs on textile fabrics for high flexible supercapacitor electrodes
A transition metal oxides, vanadium oxides have received relatively modest attention for supercapacitor applications. Yet, this material is abundant, relatively inexpensive and offers several oxidation states which can provide a broad range of redox reactions suitable for supercapacitor operation. Electrochemical supe…
Effect of graphite platelets on the thermal and gas barrier properties of the polymers
P or copolymer based expanded graphite (EG) reinforced nanocomposites were prepared by in situ polymerization technique without using any emulsifier. Graphite shows excellent electrical, mechanical and thermal properties and possesses high aspect ratio and low density, for which graphite taken as filler for preparatio…
Nanocolloids for cancer
P work by our team has demonstrated that calcium phosphosilicate nanoparticles (CPSNPs) are nontoxic candidates for bioimaging and therapeutic drug delivery applications. The pH-dependent solubility profiles of CPSNPs make this class of nanoparticles especially useful for in vitro and in vivo delivery of fluoroprobes…
Nanostructured self-assembled P3HT thin films and their application to enhance organic solar cell efficiency
N conjugated polymer thin films represent a promising material for applications such as sensing or organic photovoltaics due to their enhanced interface and semi-conducting properties. While most researchers focus their studies on either elaborated chemistry or time and energy-consuming nano-imprinting methods, we her…
Controlled fabrication of nanostructured ZnO gas sensors
L temperature hydrothermal synthesis of different ZnO nanostructures with rational control over their morphology and size is important for a wide range of sensing applications. ZnO nanostructures with different dimensionalities have been synthesized through low temperature hydrothermal techniques. One dimensional ZnO…
Construction, functionalization and organization of dendrimer with conjugated backbones
D containing rigid conjugated backbones were prepared by a convergent method where the attachment of dendritic branches and the extension of phenylene-ethynylene units were alternatively manipulated on the structure of AB2 substituted diphenylacetylene. These dendrimer structures were applied for the construction of n…
Structure and physical properties of ferromagnetic crystals with supramolecular cations
A crystal of dithiolene complex with supramoelcular cation, (m-fluoroanilinium+) (dibenzo[18]crown-6)[Ni(dmit)2] exhibiting ferroelectric transition at 346 K originating from dipole inversion due to flip-flop motion of the aryl moiety in the supramolecular cation have been reported. The supramolecular cations are adva…
Beyond graphene: The amazing world of layered transition metal dichalcogenides
G an atom thick of carbon semimetal, has attracted a great deal of attention due to its new properties and promising applications which might have impact in new electronic devices, novel composite materials, innovative sensors, etc. However, graphene it is not alone, there is also hexagonal boron nitride (H-BN) a laye…