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What are the 4Cs?
The 4Cs for 21st century learning are Creativity, Critical Thinking, Communication, and Collaboration. They are part of the framework for 21st Century Learning and are designed to support student learning in today’s world and are skills they can use in college and career.
What is communication (and what isn’t it)?
The P21 framework emphasizes effective use of oral, written, and nonverbal communication skills for multiple purposes (e.g., to inform, instruct, motivate, persuade, and share ideas). It also focuses on effective listening, using technology to communicate, and being able to evaluate the effectiveness of communication efforts—all within diverse contexts (adapted from P21). Note that working in partners is a great way to collaborate or build shared understanding but a critical part of communication is sharing with an authentic audience.

Ref: http://www.scielo.br/revistas/gmb/iaboutj.htm#001
 




Genetics and Molecular Biology is abstracted or indexed in:

PubMed
Science Citacion Index Expanded
Current Contents/Life Sciences
ISI Web of Science
Biotechnology Citation Index
Biological Abstracts
Excerpta Medica
Genetics Abstracts
Animal Breeding Abstracts
Plant Breeding Abstracts
Chemical Abstracts
Referativnyi Zhurnal (Abstracts Journal, Russia)
Periódica (UNAM-Mexico)
Lilacs

Concrete pavement is cost effective and beneficial because of its sustainability and durability. The maintenance and renovation periods for such pavement compared to other pavements are relatively long; however, a significant issue with pavements, especially roller compacted concrete pavements (RCCP), is salt scaling which occurs due to saline solutions such as deicer salts. In the present work, the performance of RCC containing a natural pozzolan called Trass, as a supplementary cementitious material, and an air-entraining agent for salt scaling was investigated. Mechanical and durability tests were performed on specimens containing a water to binder ratio of 0.32, with and without Trass, and an air-entraining agent. It was concluded that, Trass could not improve the compressive and tensile strengths, however, the permeability was improved. Moreover, the amount of mass loss due to salt scaling was not decreased. In all concrete mixtures, using a suitable amount of an air-entraining agent to maintain a total air content of 4.5–5% was found to be necessary for producing RCC containing Trass.