718 search results

Five ways you can tell if your child is ‘normal’
Health, Sports & Psychology

Five ways you can tell if your child is ‘normal’

...energy, and will need a lot of physical exercise, compared to other children of a similar age. At the extreme end of the continuum, hyperactivity may be suggestive of Attention Deficit Hyperactivity Disorder (ADHD), but a thorough formal assessment is required to diagnose this disorder. At the other end of the continuum there are children who have very little energy, and...
Broken Hearts in Batten Disease (Juvenile Dementia)
Science, Maths & Technology

Broken Hearts in Batten Disease (Juvenile Dementia)

...energy to cells. Because muscles need a lot of energy, they contain many mitochondria which form an interconnected network How can a heart break? You heard that too low or too high a heart rate can be detrimental to the function of the heart. When this is the case, tissues - including the heart itself - do not receive enough oxygen to function effectively. This can lead...
Matt Ridley - Stories of Change
Nature & Environment

Matt Ridley - Stories of Change

...energy was first kindled. I suspect your story may be slightly different to everybody else’s. MR: Well, yes and no. I got very interested in the climate story when I was covering it for The Economist in the late eighties, early nineties. RH: I’m thinking way back from then, because very few people have a coal mine on their land! MR: Yes, although the coalmine’s...
The gut microbiome: balancing the body
Science, Maths & Technology

The gut microbiome: balancing the body

...energy or resources necessary for life. The breaking down, or digestion, of the food we eat is an important metabolic process, as it enables us to gain energy and nutrients from food. The energy obtained from food is used as fuel by the cells throughout the body, while the nutrients are used as building blocks to manufacture important molecules. Food is digested within...
What effect does increasing noise pollution have on mammals?
Nature & Environment

What effect does increasing noise pollution have on mammals?

...energy and interrupts foraging, which is crucial for any animal, but particularly for small-bodied species with high energetic demands such as the prairie dog. So the cost of reacting to perceived danger must be balanced against the risk of staying put. Being too reactive could, over time, affect the fitness of an individual prairie dog, and potentially impact upon their...
Hot forging (closed die)
Science, Maths & Technology

Hot forging (closed die)

...energy costs and oxidation. Mechanical crank or friction screw presses with load ratings 500–14,000 tons used. Hydraulic presses used for aluminium alloy forgings with rating of 750–65,000 tons. Production rates vary with size of forging and degree of automation: crank presses with auto-transfer 300–600 parts h-1 hot formers (e.g. Hatebur) totally enclosed dies...
Electroless plating
Science, Maths & Technology

Electroless plating

...energy for process. (Sulphuric acid and ammonium hydroxide added to control pH to 4.5–5.0). Manufacture: Production line consists of the following stages: alkaline soak or electroclean cold or warm water rinse acid pickle rinse electroless plate Additional pre-treatment is needed to produce a catalytic surface (Pd, Rh, Ag, Au, Ni, Fe, Co, Ru, Al) for plating copper,...
World must avert flood of climate refugees - Climate News Network
Nature & Environment

World must avert flood of climate refugees - Climate News Network

...energy supplies. “Violence and disruption stemming from the stresses created by abrupt changes in the climate pose a different type of threat to national security than we are accustomed to today,” the report said. Controversial role Lord Ashdown foresees a direct and controversial role for military forces in the near future − not simply in fighting these wars, but...