14 Matching Annotations
  1. Oct 2021
    1. So in a 2013 study, Ting’s team accelerated the process and boosted cyanide production by creating two new strains of the bacteria, each of which had an extra copy of the genes controlling enzyme production (2). The researchers included a new DNA sequence, called a promoter, which allowed them to trigger enzyme production by adding a chemical. The engineered strains cranked out 51 to 68% more cyanide, and the fraction of gold recovered rose from 11% to 25 to 30%.

      Genetic engineering and optimization of the process.

    2. Hydrometallurgy, a process that uses chemicals such as acids or cyanide to leach metals, generates toxic effluent.
    3. Pyrometallurgy involves heating e-waste to more than 1,000 °C, requiring a lot of energy and releasing toxic gases.
    4. Although the handling and processing of e-waste are hard to track, government documents and scientific reports suggest that only 20% of it is being properly recycled worldwide (1).

      Estimates of e-waste that is properly recycled.

    5. bioleaching

      Using bacteria to leach metals from electronics.

    6. e-waste

      Electronic waste: discarded or no longer used electronic devices.

  2. Sep 2021
    1. Just as normalizing the use of pronouns has been an important step for supporting gender justice, we argue that normalizing access talk is an important step for advancing disability justice in STEM fields. Moreover, we argue that all individuals have access needs, regardless of whether they are disabled or nondisabled.

      normalizing use of sharing and checking access needs.

    2. Access Needs: Centering Students and Disrupting Ableist Norms in STEM

      NIST September 2021

    1. I can ethically and knowledgeably

      This combination of ethically AND knowledgeably is powerful. The ethical component is not only a motivator here but also a call to action.

  3. Aug 2021
    1. Some bacteria produce chemicals that leach metals from electronic scrap

      bioleaching is a term used.

    2. precious metals

      Metallic chemicals of high economic value.

    3. Chromobacterium violaceum

      Batista and Silver Neto describe Chromobacterium violaceum as a soil and water organism with the ability to produce industrially important small molecules and be used as a model of an environmental opportunistic pathogen.

    4. violacein

      Violacein is a pigment that occurs naturally and has antibiotic properties.

    1. Table 1.Guide for considering faculty roles in increasing inclusive excellence in STEM classrooms

      I love this!