Results 61 to 70 of about 5,832,061 (187)

Innovative Activated Carbon Based on Deep Eutectic Solvents (DES) and H3PO4

open access: yesC, 2019
In this present work, a novel method for synthesis of palm kernel shell activated carbon was established using DES (choline chloride/urea)/H3PO4 as the activating agent.
Aloysius Akaangee Pam
doaj   +1 more source

Method for milling and drilling glass [PDF]

open access: yes, 1980
A process for machining glass by placing a rotating carbide working surface under minimum pressure against an area of glass to be worked is described.
Rice, S. H.
core   +1 more source

Global Vegetation‐Temperature Sensitivity and Its Driving Forces in the 21st Century

open access: yesEarth's Future
It has been projected that climatic warming will contribute to vegetation productivity variability at the global scale. With a continued warming, to what extent and where the vegetation productivity is most affected by warming has still not been ...
Wang Yuxi   +3 more
doaj   +1 more source

Effects of different vegetation restoration models on soil nutrients in the water level fluctuation zone of a large reservoir

open access: yesEcological Indicators
Vegetation restoration is synergistic with restoring riparian ecosystems to enhance soil quality in the water level fluctuation zone (WLFZ), which is degraded by repeated inundations and cyclical fluctuations of reservoir water levels.
Bai Qinfei   +5 more
doaj   +1 more source

Stability of the surface area preserving mean curvature flow in Euclidean space [PDF]

open access: yes, 2012
We show that the surface area preserving mean curvature flow in Euclidean space exists for all time and converges exponentially to a round sphere, if initially the L^2-norm of the traceless second fundamental form is small (but the initial hypersurface ...
Huang, Zheng, Lin, Longzhi
core  

Diffusion of C-O-H Fluids in a Sub-Nanometer Pore Network: Role of Pore Surface Area and Its Ratio with Pore Volume

open access: yesC
Porous materials are characterized by the pore surface area (S) and volume (V) accessible to a confined fluid. For mesoporous materials NMR measurements of diffusion are used to assess the S/V ratio, because at short times, only the diffusivity of ...
Siddharth Gautam, David Cole
doaj   +1 more source

Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol

open access: yesOpen Chemistry, 2019
The high surface area of mesoporous silica SBA-15 has been synthesized successfully by hydrothermal treatment with direct addition of PVA, triblock copolymer (P123) as a direct structure agent and tetraethyl orthosilicate (TEOS) as a precursor.
Thahir Ridhawati   +3 more
doaj   +1 more source

Morphology and Properties of Electrospun PCL and Its Composites for Medical Applications: A Mini Review

open access: yesApplied Sciences, 2019
Polycaprolactone (PCL) is one of the most used synthetic polymers for medical applications due to its biocompatibility and slow biodegradation character. Combining the inherent properties of the PCL matrix with the characteristic of nanofibrous particles,
Mokgaotsa Jonas Mochane   +4 more
doaj   +1 more source

Droplet size and morphology characterization for diesel sprays under atmospheric operating conditions [PDF]

open access: yes, 2015
The shape of microscopic fuel droplets may differ from the perfect sphere, affecting their external surface area and thus the heat transfer with the surrounding gas.
Crua, C.   +4 more
core  

P-capacity vs surface-area

open access: yesAdvances in Mathematics, 2017
This paper is devoted to exploring the relationship between the $[1,n)\ni p$-capacity and the surface-area in $\mathbb R^{n\ge 2}$ which especially shows: if $ \subset\mathbb R^n$ is a convex, compact, smooth set with its interior $ ^\circ\not=\emptyset$ and the mean curvature $H(\partial ,\cdot)>0$ of its boundary $\partial $ then $$ \left ...
openaire   +2 more sources

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