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Understanding water quality
Nature & Environment

Understanding water quality

...solids (Table 6). The liquid leaving the primary sedimentation tanks still contains very fine solids and dissolved matter, so secondary treatment is usually required. Figure 18 Flow diagram of the stages of treatment in a sewage treatment plant. Table 6 The percentage removal (cumulative, from initial state) of constituents or characteristics of sewage after successive...
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Level 2: Intermediate 10 hrs
Brady’s Rogue Reagent?
Science, Maths & Technology

Brady’s Rogue Reagent?

...solid, is normally supplied and stored under damp conditions. Actually the commercially supplied DNPH solid material contains by weight up to 33% water. The water is included to prevent it forming a dust mixture with air thus stabilising it and substantially lowering the risk of it undergoing ignition from any source such as a spark or mechanical friction (shock...
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Article 5 mins
MAED (Applied Linguistics) at the OU
Languages

MAED (Applied Linguistics) at the OU

...solid grounding in a range of ideas and techniques within applied linguistics (e.g. semantics, pragmatics, intercultural communication, conversation analysis, ethnography, language and globalisation, role of technologies) and apply this to case studies from a variety of contexts. You will enhance your practical understanding of how such research and enquiry can be useful...
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Article 5 mins
Password checker
Digital & Computing

Password checker

...solid is your password? Use our password checker to test how strong yours is...NB: Please be aware the embedded version below has been affected by a recent site update. We are currently investigating into this. In the meantime, you can access the same tool hosted on a different server for a smoother experience. Click here. Password Strength Checker Password: Hide Welcome...
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Activity 5 mins
Microbes – friend or foe?
Nature & Environment

Microbes – friend or foe?

...solid material drops to the bottom of a tank. This solid material is then removed and usually buried in landfill, burnt or, after further treatment, used as fertiliser on agricultural land. Figure 5 A simplified diagram of a sewage treatment works What then remains is the liquid portion, or effluent, which is rich in suspended organic matter and some pathogenic microbes....
View course Microbes – friend or foe?
Level 1: Introductory 2 hrs
The Plessey Factory Occupation, Bathgate, 1982
Society, Politics & Law

The Plessey Factory Occupation, Bathgate, 1982

...sang down the line that ‘anything you can do, I can do better’. The workers at Plessey had also decided that they would occupy to strengthen their case that closure was unjust. The announcement was sudden, and action began swiftly. Some of those not on shift were stunned to discover when they arrived for work that the plant was under worker control. Elizabeth Fairley,...
View article The Plessey Factory Occupation, Bathgate, 1982
Article 10 mins
Blow moulding
Science, Maths & Technology

Blow moulding

...liquid containers from shampoo bottles to petrol tanks, and is slowly replacing the more traditional glass, metal and paper containers. Materials: Main material requirement is sufficient melt strength to form a suitable parison. Process is suitable for a wide range of “consumer polymers”, the most common being low and high density polyethylene, polypropylene,...
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Article 5 mins
Hallowain't III: Woodfrogs
Nature & Environment

Hallowain't III: Woodfrogs

...solid. Being frozen solid in cold weather wouldn't be that impressive, were it not for what happens when it warms up. Because the frog uses a natural anti-freeze in its blood to defrost itself. The LA Times reported a study by the Institute of Arctic Biology which discovered the little critters' approach to staying alive in a hostile climate: To see how these frogs were...
View video Hallowain't III: Woodfrogs
Video 5 mins