5 research outputs found
Importance of surfactant adsorption in soil & ground water remediation
The term surfactant is derived from the words surface active agent. Surfactants provide remarkable benefits in many textile wet processes. A surface active chemical is one which tends to accumulate at a surface or interface. An interface is the area of contact between two substances. Where the interface is between two substances not in the same phase, the interface is usually called a surface
Case report – ancient schwannoma of the scrotum
BACKGROUND: Scrotal schwannoma is a rare neoplasm and poses a diagnostic challenge to urologists. This article describes a rare case of ancient scrotal schwannoma and reviews the current modality of investigation and treatment of this tumour. CASE REPORT: A 28 year old man presented with a 3-month history of an asymptomatic scrotal swelling. Ultrasonography and computer topography revealed an intra-scrotal and extra-testicular mass without local invasion. Surgical excision was undertaken and histology was an ancient schwannoma of the scrotum. CONCLUSION: Schwannoma is a benign encapsulating neoplasm with an overall low incidence, occurring mostly in the head and neck region and seldom in the scrotum. Histology shows two distinctive patterns, Antoni type A and B areas. Variations of schwannoma such as cellular, ancient, glandular and epithelioid are observed based on the appearances. Ancient schwannoma exhibits pleomorphism without mitosis as the result of cellular degeneration, which can lead to an erroneous diagnosis of malignancy. Imaging modalities are non-specific for schwannomas, but can define tumour size, site and extension. The mainstay treatment is complete excision, although local recurrence may occur in large and incompletely excised lesions. Malignant change is exceedingly rare
Pollutant Soot for Pollutant Dye Degradation: Soluble Graphene Nanosheets for Visible Light Induced Photodegradation of Methylene Blue
The findings presented
here offer a new approach for the environmental
application of pollutant soot somewhat like utilizing a pollutant
material for degrading the other pollutant material. Herein, a simpler
approach is described for the isolation of two-dimensional graphitic
materials as water-soluble graphene nanosheets (wsGNS) from the globally
identified dirty–dangerous black pollutant particulate matter
as black carbon (BC) from the petrol soot. The as-isolated wsGNS are
further employed for the photocatalytic degradation of toxic dye such
as methylene blue (MB) under the influence of visible light irradiation.
The photodegradation performance of wsGNS compared to insoluble graphene
nanosheets (GNS) showed ∼11 times faster degradation rate within
∼90 min of visible light exposure (60 W tungsten bulb). The
insights of the aqueous phase photodegradation of MB by the system
of MB-wsGNS were studied by different chemical characterization techniques
including nuclear magnetic resonance spectroscopy, high-performance
liquid chromatography, Raman, and fourier transform infrared spectroscopy.
Furthermore, we have checked the regeneration efficiency of wsGNS,
which was still at its higher value even after five cycles of recycling
testing
Sunlight-Induced Selective Photocatalytic Degradation of Methylene Blue in Bacterial Culture by Pollutant Soot Derived Nontoxic Graphene Nanosheets
Herein,
a potential approach is described for assessing the ecological
importance of the graphitic nanocarbons isolated from dirty, dangerous
black pollutant particulate material. A simple experiment of photodegradation
and a toxicological test were done using the natural sunlight as a
source of energy and the pollutant petrol soot derived water-soluble
graphene nanosheets (wsGNS) as photocatalyst to achieve complete degradation
of pollutant organic dye as methylene blue (MB). Compared to the artificial
source of visible light (60W tungsten bulb), the sunlight-induced
photodegradation using wsGNS show ∼1.5 times higher rate of
photodegradation. The toxicological test confirmed the nontoxic behavior
of wsGNS against the two different types of bacterial strains: Gram-negative
and Gram-positive cells, <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>, respectively. Moreover, wsGNS are
precisely used for the selective photodegradation of MB without harming
the bacterial growth from the pool of MB-bacterial strains. Nontoxicity
and selectivity along with the improved in photodegradation efficiencies
by wsGNS under the influence of sunlight are the most significant
and sustainable perspectives of the present finding