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Online since: December 2009
Authors: Norhamidi Muhamad, Hooman Abolhasani
Therefore, starch can be theoretically used as filler in water-soluble binders which can be extracted using hot water in debinding section.
Tapioca starch granules swell in water at 76°C and create a transparent gel [4].
The excess water content in thermoplastic starch evaporates due to the working point temperature [7].
Material Weight [g] wt.% Starch 164.8 41.2 Water* 271.8 - Glycerol 93.6 23.4 LLDPE 114 28.5 Citric Acid 7.6 1.9 Stearic Acid 20 5 *: Water content in thermoplastic starch evaporates due to the working point temperature.
Dziedzic: Handbook of starch hydrolysis products and their derivatives. 1st ed., London: Blackie Academic & Professional (1995)
Online since: June 2012
Authors: Tong Chun Li, Quang Hung Nguyen, Hoang Hung Vu
As an illustration, according to the Chinese Water Resources Professional Standard SL 282-2003 [2], physical model is only used as a recommendation for first-grade and second-grade structures or structures that are especial in the construction process so as to verify the numerical model, while the FEM is used for stress analysis of arch dams.
The Vietnamese Water Resources Professional Standard 14TCN 56-88 [5] has specified that for arch dams with a height greater than 60m or below but relatively under complex conditions of structure or foundation, stress analyses must be performed based on both numerical and physical testing models, additionally designers are optional to select an analysis method to the numerical model.
[5] Ministry of Water Resources of the S.
F, A Summary of the International Academic for Arch Dams, Water Power, 2(1988), 49-52
H, Computational Rock Mechanics and Engineering, Beiking: China Water Power Press, 2006
Online since: March 2014
Authors: Aivars Zhurinsh, Kristine Meile, Baiba Spince, Galina Dobele
A glass column (60 cm x 2 cm) was filled with a suspension of the resin in the necessary eluent – water or water/ethanol mixture (4:1).
Then real pyrolysis samples were separated on a WAC exchange column with water and a water/ethanol mixture (4:1) as the mobile phases.
Fig. 1: WAC exchange column chromatograms of: a) standard d-cellobiose, d-glucose and levoglucosan, b) a real pyrolysis liquids sample with water as the mobile phase, c) a real pyrolysis liquids sample with a water/ethanol mixture as the mobile phase.
Fig. 3: SAC exchange column chromatograms of: a) a real pyrolysis liquids sample with water as the mobile phase, b) a real pyrolysis liquids sample with a water/ethanol mixture as the mobile phase.
Developments in Thermochemical Biomass Conversion Vol I, Blackie Academic and Professional, London, Weinheim, New York, Tokyo, Melbourne, 1997, pp. 536-548
Online since: February 2022
Authors: Dmitry Yu. Dubrov
Distilled water comes from container 1 through connecting tube 2 and the capillaries of porous insert 5 into the cutting zone.
Let us consider an example of calculating the amount of water consumed in open-type evaporative cooling.
Q=m(cΔT+r) (3) Assuming that all the heat entering the cutter is spent on heating water and vaporization, we determine the required amount of water m spent on processing one part m(cΔT+r) =Qcτ m=Qcτ(cΔT+r), (4) where c – specific heat of water, J/(kg K); r – specific heat of vaporization, J/kg; m – weight of water, kg; ΔT – temperature difference, °С.
Water consumption during evaporative cooling of titanium alloy VT3-1 (VK6; t = 4mm; s = 0.6mm/rev; v = 25-200m/min.)
As the cutting speed increases, the amount of water required for cooling increases.
Online since: May 2012
Authors: Nan Lin, Fei Liu
Wuhan urban characteristics Wuhan has a deep water culture characteristics, with water as the main body formed the water culture landscape and water-related social and cultural phenomena.
Riverside is the largest urban characteristic of Wuhan, to city as the center, by the Yangtze River is given priority to, constitute a large water channel, to ensure the good ecological environment.
Wuhan water system developed, riverside and lakeside characteristic distinctive.
Water area of more than 2000 square kilometers, about of the city has a total area of one-fourth, which is unique in major domestic cities[3].
"Ring" is point to form water green ring.
Online since: February 2013
Authors: Ting Yan Bi
In biological energy, water power, wind power and solar energy and some like, we need to establish and perfect the relevant measures, and further make the development of renewable energy industry clear in the position of the national strategies.
And renewable energy includes biomass energy, water power, wind, solar, etc.
With policy of industry of water and electricity, China enacted renewable energy law which made specific provision for the important problems of supportability acquisition, financial support and other renewable energy in December 2009.
Fig. 1 China's wind energy utilization(1986-2008) Additional Accumulative For the policy of industry of water and wind, China's wind energy resources are rich and it has gained 100% growth for five years, it is shown in fig. 1.
The solar water heater is one of the China's renewable energy developments, and accounts for more than 605 of the world usage, as shown in fig. 2.
Online since: August 2013
Authors: Zhi Yuan Yang, Jiang Long, Shi Cun Qu, Xiao Yuan Ren
According to the contact angle, the wettability of SBC samples and HCC samples in deionized water is better than that of JCC samples.
As the coal rank increases, the pore volume and water content decrease, so does the content of hydrophilic groups, and the coal wettability decreases thereupon too.
Compared with coal samples in deionized water, the contact angle of the SBC samples treated with SDS solution is remarkably decreased.
A broad absorption peak can be seen in 3100-3600 cm-1 wavelength range, which is assigned to the stretching vibrations of -OH bonds and related to flee water(capillary pore water and surface absorbed water) [11].
References [1] J.S.Laskowski: Coal Flotation and Fine Coal Utilization (Gulf Professional Publication, Canada, 2001)
Online since: July 2024
Authors: Zaheer Ahmad, Naveed Anjum, Aqeel Ahmed, Muhammad Adnan, Munaza Komal, Khalid Hussain
Properties of fine and coarse aggregates Property Fine Aggregate Coarse Aggregate Fineness Modulus 2.34 - Water Absorption 1.67% 1.23 Specific Gravity 2.63 2.71 Density 2640 kg/m3 2718 kg/m3 Water This study made use of potable water that was free of all impurities and met [15]'s standards.
The notion was that augmenting the volume ratio of steel and nylon fibers would enhance water absorption.
This increase in concrete's water absorption may be caused by nylon and steel fibers, which absorb more water steel and nylon fibers do and also trap more air in the concrete than control combination.
Table of water absorption of concrete Description Water absorption (%) NF,SF (1.75%) 2.4 NF,SF (2.50%) 2.95 NF,SF (3.25%) 3.5 Fig. 4.
Engineers and construction professionals can leverage this knowledge to design more resilient and durable infrastructure that can withstand a wider range of stressors and environmental conditions.
Online since: April 2014
Authors: Xian Zheng Gong, Bo Xue Sun, Yu Liu, Zhi Hong Wang, Chen Li, Xian Ce Meng
The environmental impacts of fresh water consumptions are also discussed.
Methodology Marble exploration Marble mining Waste rock recycle Energy & fresh water input Marble block Waste rock disposal The goal and scope.
It is noticed that the energy input is primarily electricity power and the fresh water consumptions are not so huge because the recycle rate is up to more than 90%.
Consumptions of fresh water m3/d 1580.09 The recycle rate of waste water is 90.37%.
In fact, if we choose the efficient machines and professional workers, the energy consumtions could be fewer.
Online since: July 2007
Authors: James A. Brierley
My perceptions of the biohydrometallurgical field span four decades and stem from being a professional microbiologist conducting academic research and research for process development and applications.
The rock material was irrigated with mine tailings water, containing 10 5 A. ferrooxidans/mL the mine water also served as an inoculum.
The source of these moderate thermophiles was thought to be the mine water used for irrigation.
Some lessons that a professional microbiologist learns from process development for the mining industries are: • The development process requires time -- years to a decade or more can elapse from process inception to process implementation
Showing 1831 to 1840 of 3745 items