We review the present state of polymer nanocomposites research in which fillers are single-wall or multiwall carbon nanotubes. By way background we provide a brief synopsis about nanotube materials and their suspensions. summarize critique various nanotube/polymer composite fabrication methods including solution mixing, melt situ polymerization with particular emphasis on evaluating dispersion discuss mechanical, electrical, rheological, thermal, flammability properties separately how these...

We have prepared nylon 6,10 nanocomposites using functionalized single wall carbon nanotubes and our interfacial in situ polycondensation method. The specific functional groups -(CH2)nCOCl [n = 4 9] on the sidewalls of SWNT were designed to covalently link matrix via alkyl segments. composites with show significant improvements tensile modulus, strength, toughness relative modified non-functionalized SWNT. linkages at SWNT/nylon interface contribute significantly improving composites.

Thermoreversible organogels were prepared from carbamates with alkyl side chains of different lengths. Gelation was possible only up to an chain length 12 carbons, beyond which crystallization occurs, due the dominant van der Waals interaction between chains. This is in contrast other alkane-based organogels, gelating efficiency increased alkane (see Abdallah, D. J.; Weiss, R. G. Adv. Mater. 2000, 12, 1237). The critical concentration for gelation decreases drastically increase length....

Now a days, Buriganga is one of the most polluted rivers in Bangladesh. Most industries and factories Dhaka are situated on banks or very close to river system. Substantial part urban sewage city also thrown river. A study was conducted determine pollution level water Field investigation started from June 2004 Sample collection six times at an interval two months up April, 2005. Different quality parameters such as pH, EC, TDS, DO, Cations (Na+, K+, Ca2+, Mg2+,NH4+) anions (HCO3-, Cl-,...

A good number of people are living at rural side in Bangladesh. They have right to get proper electricity, like any other basic human needs. Bangladesh despite having the enormous energy resources but it's facing acute shortage Electricity. Scientists and engineers thinking over day night about this issue; try provide possible solution overcome issue. In paper some important parameters e.g., Voltage regulation, Energy efficiency etc. PKL cell analysed experimentally compare with traditional...

Abstract Organoboron is a class of compounds widely used in organic synthesis, pharmaceuticals, material science, sensors, and so on. Therefore, the development efficient selective electrochemical methods to synthesize organoboron has attracted much interest as an emerging sustainable technique synthesis. Here, we summarized research on borylations, including electrochemically driven borylation arenes, alkanes, aryl, or alkyl halides, activated carboxylic acids etc., based direct...

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSurfactant-Induced Crystallization of PolycarbonateP. R. Sundararajan, Shanti Singh, and M. MoniruzzamanView Author Information Department Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada Cite this: Macromolecules 2004, 37, 26, 10208–10211Publication Date (Web):December 1, 2004Publication History Received23 August 2004Revised19 October 2004Published online1 December inissue 1...

The difference in the morphology and crystallization aspects of hydrogen-bond-mediated self-assembling systems with single double hydrogen-bonding motifs is studied here carbamates as an example. These have alkyl side chains various lengths, from C4 to C18. biscarbamates sites symmetric substitution segments show a significantly different morphological behavior compared N-octadecyl carbamate esters (ref 5, referred simple henceforth) hydrogen-bond motif asymmetric chains. In contrast which...

The microbiological status of water from dispensers in different roadside restaurants Dhaka city and Savar area was analyzed this study. Seven samples 8 were checked. heterotrophic plate count a range 1.0 x 10(3) CFU mL(-1) to 2.0 10(4) (from new bottles), 1.5 (after dispensation), l0(5) serving glass). In several the samples, higher than bottle or after dispensation, suggesting added contamination glass. 80% contaminated with total fecal coliform bacteria, which render these waters...

DOI: http://dx.doi.org/10.3329/dujbs.v21i1.9750 DUJBS 2012 21(1): 105-107

This study illustrates the process of removal chromium from chrome tanning waste-water by fly ash which was drive shaving dust. experiment carried out in a batch with laboratory prepared adsorbent samples and water collected local tanneries. The influence various factors likes doses, contact time, initial concentration on effluent investigated. FTIR analysis done to identify functional groups presents ash. maximum absorption capacity found be 97.86%. And 23.11 mg/g at 1000.3mg/l 1291 mg/l...

The B12 derivative, heptamethyl cobyrinate, -mediated electrochemical synthesis of cyanoformamides has been developed. Aerobic oxygenation the carbon-centered radical initiated in situ generation reactive acyl chloride intermediate, which led to presence an amine. This one-pot and scalable synthetic method demonstrated with 41 examples up 94% yields 21 new compounds. mechanism electrolysis mediated by derivative proposed based on DFT calculations.

Abstract Giant viruses (GVs) play crucial roles in the global ocean microbial food web and biogeochemistry by infecting protists. Traditionally, insights into GV ecology functions have been limited to culture-based studies. However, recent metagenomic advances uncovered over 1,800 new genomes from world’s oceans. While this rapid increase genomic information marks an impressive advance for field, it is nowhere close extensive available other marine entities - e.g., prokaryotes their...

Abstract Viruses in the kingdom Bamfordvirae , specifically giant viruses (NCLDVs) phylum Nucleocytoviricota and smaller members Preplasmiviricota phylum, are widespread important groups of that infect eukaryotes. While this such as viruses, polinton-like virophages have gained large interest from researchers recent years, there is still a lack streamlined tools for recovery their genomes metagenomic datasets. Here, we present BEREN, comprehensive bioinformatic tool to unlock diversity these...

Pesticide residue monitoring in river water is obligatory for their negative ecotoxicological consequences. The current-use pesticides (CUPs) include a diverse range of synthetic registered by regulatory bodies worldwide as an alternative to the banned organochlorine (OCPs). Nowadays, CUPs are preferred agricultural and non-agricultural purposes due low persistence moderate toxicity. This work aimed optimize rapid, sensitive salting-out assisted liquid-liquid microextraction (SALLME) method...

Hydrogen bond mediated self-assembling carbamates with alkyl side chains of different lengths were investigated respect to thermal behavior and morphology. The length the chain has an influence on heat fusion, crystallinity, crystallite size. Morphologies samples slowly cooled from melt those quenched different. While plasticizers or clarifiers are usually used modify crystalline morphology materials, we examined possibility effecting similar changes by blending any two types carbamates....