The only downside is the cost of the additional carbon needed for the micro-organisms to metabolize and produce these biodegradable polyesters – although waste cooking oils and animal oils are promising, cost-effective, and sustainable options. Companies that have introduced PHA plastic into their ...
application of a certain force—of metals and other solids. Plastic forming is primarily used in the metalworking of steel materials such as those for automobile parts. Unlike cutting with a lathe, this method does not produce chips and also allows mass production of the same parts through mold...
The definition of a greenhouse gas is at the same time very simple and very complicated for the ordinary man (or woman !) : such a gaz is “just” a gas mixed in the atmosphere thatabsorbs the infrared radiation emitted by the earth’s surface. We are not accustomed to these gases bec...
Polyethylene Plastic HDPE is a type of polyethylene that is made from the natural gas ethane. When ethane is heated to 1500 degrees Fahrenheit, the molecules break apart. One of the new molecules formed is ethylene. Ethylene is a gas that becomes a resin during the process of polymerization....
At farmers’ markets, for example, Richardson said single-use plastic bags handed out by vendors can be thought of as similar to produce bags in that they keep products separate from other items. Monitoring statewide legislation There is one factor that casts some uncert...
Anther human activity leading to earthquakes is hydraulic fracturing (水力压裂) for oil and gas. In this process, water, sand, and chemicals are forced to flow underground under high pressure to fracture rocks to let natural resources out. As those resources, such as oil and natural gas, make...
Structured packing is made from a variety of materials including corrugated sheets of perforated embossed metal, plastic, or wire gauze. The resulting product is an open honeycomb with inclined flow channels producing a high surface area coupled with a low gas flow resistance. Enhancements are often...
Gasification is a process that is used to turn a variety of substances into gas by partially combusting the substances, reacting...
Themarginal cost of productionrefers to the total cost to produce one additional unit. In economic theory, a firm will continue to expand the production of a good until its marginal cost of production is equal to its marginal product (marginal revenue). This, in turn, will tend to equal it...
The cheapest form of alternative energy is solar power, according to the International Energy Agency. In its 2020 World Outlook Report, the Agency found that photovoltaic solar energy is "consistently cheaper than new coal- or gas-fired power plants in most countries, and solar projects now offer...