AAA Daily Fuel Gauge Report for Friday, 6/21/24
National Average Price for Regular Unleaded Current: $3.456; Month Ago: $3.598; Year Ago: $3.581. National Average Price for Diesel Current: $3.806; Month Ago: $3.906; Year Ago: $3.897.
https://gasprices.aaa.com/
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From Cellulose to 3D Objects: 3D printing with a biobased polymer for CO2-neutral manufacturing
In our modern world, eliminating plastics is inconceivable. Unfortunately, they do have disadvantages, including the formation of CO2 in both production and combustion, depletion of fossil feedstocks, and growth of landfills. In the journal Angewandte Chemie, Russian researchers introduce a new way forward, a polymer made entirely from biomass that can easily and inexpensively be used in 3D printing. Objects produced in this way are of high quality, easily recyclable, and highly solvent-resistant.
Conventional “subtractive” processes involve cutting, sawing, turning, or milling, which results in a great deal of wasted material. In contrast, 3D printing processes are, in principle, waste-free, because they are “additive”: three-dimensional objects are produced in a layer-by-layer application of material. The most common technique is called fused deposition modeling (FDM). In this process, the raw material is squirted through a hot nozzle onto a mobile base and thereby liquefied (extrusion). The printer head produces the programmed form like in a conventional two-dimensional printing process, releasing small amounts of the polymer instead of ink. This is repeated for layer after layer until the desired three-dimensional object is complete. Yet, the polymers used until now have a number of disadvantages that limit their use. Some of the polymers are attacked by organic solvents. Those that withstand the solvents, on the other hand, adhere poorly and shrink on heating, allowing their layers to come apart and causing errors in the printing process. Click Read More below for additional information.
Washington Sets its Sights on Ocean Shipping
A silver lining in the global economy's post-pandemic supply-chain challenges has been policymakers' heightened attention to long-term issues hampering our domestic freight transportation networks. While shuttered Asian factories, chip shortages and other emerging chokepoints are newer problems particular to COVID-19 shutdowns, they’ve shed light on broader, systemic issues that have long impacted American trucking companies and their ability to keep the supply chain turning. Many of those issues emanate from our maritime ports, where abusive business practices by a cartel of foreign-owned ocean shipping companies have fleeced American trucking companies and U.S. consumers to the tune of billions of dollars. Fortunately, both Congress and the Biden Administration are aligned on the goal of increasing marketplace fairness in our ports and eliminating anti-competitive behavior that's enabled ocean carriers to reap record profits at the expense of truckers and consumers.