Use of natural source

The novel composite nanomaterials were synthesized via a simple method from two natural clay mineral sources, graphite and halloysite. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), Brunauer-Emmet-Teller (BET) methods.

10p vikwong 29-09-2024 1 1   Download

Avocado peel has been considered as a potential source of natural antioxidants in which phenolics are among the most important compounds. Therefore, this study aims to optimize the extraction process of phenolics using response surface methodology and evaluate the corresponding antioxidant activity.

11p vifaye 20-09-2024 2 1   Download

A new semi-empirical technic has been established relying on the linkage between the chemistry in the bulk liquid and that taking place in the acoustic cavitation bubble. The open-source COPASI software has been used for the optimization of number density according to the total yield of a single bubble and the fitting of the experimental yield of hydrogen peroxide in the sonicated solution. It was observed that the number density is increased with the rise of ultrasound frequency from 200 to 1140 kHz, independently of the saturating gas nature (O2, Ar or air).

10p dianmotminh02 03-05-2024 4 3   Download

Presently there is a great demand for the use of natural colours throughout the world due to non-biodegradable and carcinogenic nature associated with synthetic dyes. Natural dyes are non-toxic, non-allergic and non-carcinogenic as these are obtained from animals or vegetable matters without any chemical processing. Natural dyes are mostly used to dye natural fibers like cotton, wool and silk.

9p chauchaungayxua10 19-03-2021 10 2   Download

Natural resources are being consumed at an alarming rate, and the capacity of resources and technologies to satisfy food demand for the growing population remains uncertain. Since agriculture along with its allied sector, is the largest source of livelihood in India having 70% of rural household depending on agriculture as their primary occupation of which 82 % of farmers are small and marginal (FAO, 2019), the use of non monetory inputs by the poor farmers can be quite the most feasible, eco-friendly and climate smart option to preserve the environment and safeguard the natural resources.

11p angicungduoc6 22-07-2020 12 3   Download

The study of substitute brake pad materials from sustainable sources is an area that requires immediate attention. This is because previous materials used (such as asbestos) are known to have carcinogenic effects.

24p lucastanguyen 01-06-2020 22 2   Download

The challenge of climate change results primarily from the global use of fossil fuel. Renewable energy as alternative energy source allows the use of natural sources such as micro-hydro, wind; solar, and biomass that are sustainable to be explored.

9p lucastanguyen 01-06-2020 30 2   Download

The human species' use of began with the conversion of natural resources into simple tools. The prehistorical discovery of the ability to control fire increased the available sources of food and the invention of the wheel helped humans in travelling in and controlling their environment. Recent technological developments, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale.

100p louisxlll18107 29-01-2013 47 5   Download

Characteristic cohomology classes, defined in modulo 2 coefficients by Stiefel [26] and Whitney [28] and with integral coefficients by Pontrjagin [24], make up the primary source of first-order invariants of smooth manifolds. When their utility was first recognized, it became an obvious goal to study the ways in which they admitted extensions to other categories, such as the categories of topological or PL manifolds; perhaps a clean description of characteristic classes for simplicial complexes could even give useful computational techniques.

25p tuanloccuoi 04-01-2013 60 6   Download

Radioactive sources which used to study were the standardized radioactive of common monoenergetic radionuclide Cs137 and standardized multigamma Co60, Ba133, Eu152. Determination of the absolute efficiency curve and energy resolution as a function of energy of GEM40P4 HPGe spectrometer are presented in this paper.

6p tuanlocmuido 19-12-2012 47 3   Download