Jyoti Giri

Tribhuvan University, Tri-Chandra Campus, Ghantaghar, Kathmandu, Nepal. · Chemistry Department

According to a recent survey, Nepal's urban air quality has been classified as one of the worst in the globe. A large portion of the country's population is subjected to health risks caused by air pollution. As Nepal has a wide variation in altitude coupled with socio-cultural and biological diversities, it is important to understand the different...

Bhasmas are prepared from metallic and herbal ingredients and are also referred to as herbo-metallic preparations. Lauha bhasma (LB) is one of the iron-based herbo-metallic preparations used in Ayurvedic medicine for treating various ailments due to iron deficiency. The preparation of LB involves normal purification (samanya sodhana), special purif...

Structural, mechanical, thermal and surface properties comprising biodegradable aromatic–aliphatic polymer poly(butylene adipate-co-terephthalate) (PBAT) and the wheat stalk-based nanocellulose (NCC) were studied. The materials were found to comprise the compatible and yet phase-segregated constituents which kept their identity in the nanocomposite...

Cellulose nanocrystal (CNC) and polyvinyl alcohol (PVA) nanocomposites are studied as a green alternative to counteract solar panel soiling. CNC synthesized from acid hydrolysis is blended with PVA, and polybutylene terephthalate (PBT) is blended with powdered silica (SiO2) for surface modification to produce a transparent, hydrophobic, and durable...

3. Overview of STI sectors 3.7 New Frontiers 3.7.2 Nanotechnology Status in Nepal

Structural, thermal and mechanical properties of the compostable composites comprising a biodegradable aliphatic-aromatic copolyester (namely, the poly(butylene adipate-co-terephthalate; PBAT), and microcrystalline cellulose (MCC) derived from agricultural waste, the wheat stalk, were investigated. Purely physical interaction between the components...

Electrical electronics waste (E-waste) being of the complex waste has become very tough to manange in environmental friendly manner. Excessive use of hand set mobile phone nowadays would produced larger E-waste soon in future, which would definetly traumatize the world very soon. Moreover the expensive metals and rare earth metals used for smart ap...

Solar panel soiling is a major barrier in electricity generation by solar Photo-Voltaic (PV) technology, especially in dust-prone cities like Kathmandu. Currently employed techniques use expensive cleaning bots, short-lived coatings or environmentally non-friendly coatings. This paper encompasses a study of a green alternative to counteract solar p...

Electrical and electronic gadgets (or E-gadgets) have become indispensable components of our daily life these days. As today’s electrical and electronic devices become tomorrow’s waste, the potential hazards of these materials in an open environment are significant, as they can contaminate soil, drinking water, air and thus directly affecting human...

Random disposal and accumulation of commodity plastics in the open environment after their end use is an issue that has triggered a lot of concerns both in public and academic debates owing to their seemingly high contribution toward the environmental pollution and potential impacts on biota and human health. Thus, finding the greener solution to t...

An agricultural waste, the wheat stalk, was used for the extraction of microcrystalline cellulose (MCC) and nanocrystalline cellulose (NCC) via a series of thermochemical and mechanical treatments. The MCC and NCC were then compounded with the biodegradable polymer, poly(butylene adipate‐co‐terephthalate), PBAT, by melt mixing. The properties of th...

p>Micro- and nanocrystalline cellulose were extracted from wheat stalk (WS) using different thermomechanical and chemical treatments and characterized by spectroscopic, microscopic and diffraction techniques. The virgin WS fibers were found to be structurally quite similar to the commercial microcrystalline cellulose (MCC). Similar to the commercia...

Micro-and nanocrystalline cellulose were extracted from wheat stalk (WS) using different thermomechanical and chemical treatments and characterized by spectroscopic, microscopic and diffraction techniques. The virgin WS fibers were found to be structurally quite similar to the commercial microcrystalline cellulose (MCC). Similar to the commercial o...

Cellulose is one of the most abundant renewable natural resources. With the advent of nanotechnology, the interests of cellulose scientists have diverted towards the extraction of nanocellulose from various plant sources and utilize them in technical applications. The reason behind the rapid progress in the nanocellulose chemistry and engineering l...

In this work, the polybutadiene (PB) block of an asymmetric lamellae forming polystyrene/polybutadiene based triblock copolymer was epoxidized to different extent in order to study its effect on morphology and mechanical behaviour of the copolymer. The products were analyzed by means of different microscopic techniques, Fourier transform infrared (...

Different amount of raw Ketuki powder (average diameter: 60 – 120 µm) was mixed with the thermoplastic polymers such as ethylene-1–octene copolymer (EOC) and isotactic polypropylene (iPP). The melt mixing was performed using an internal mixture and resulting composites were studied for the effect on morphology and mechanical behavior using electron...