DISAPPEARING BONES

Massive osteolysis: disappearing bones.

Disappearing Hardware

F or many tasks today, the use of computers is not entirely satisfactory. The interactions take effort and are often difficult. The traditional, and still prevalent, computing experience is sitting in front of a box, our attention completely absorbed in the dialog required to complete the details of a greater task. Putting this in perspective, the real objective is the task's completion, not th...

Disappearing hypercalcaemia.

Four women presented with symptomatic hypercalcaemia and raised concentrations of serum parathyroid hormone (PTH). In each case, serum calcium returned spontaneously to normal. In two patients serum PTH also fell to the normal range and biochemical relapse has not occurred despite prolonged follow-up. In the others, serum PTH remained elevated and subsequent symptomatic hypercalcaemia necessita...

Disappearing Polymorphs Revisited

Nearly twenty years ago, Dunitz and Bernstein described a selection of intriguing cases of polymorphs that disappear. The inability to obtain a crystal form that has previously been prepared is indeed a frustrating and potentially serious problem for solid-state scientists. This Review discusses recent occurrences and examples of disappearing polymorphs (as well as the emergence of elusive crys...

Disappearing forests in Malawi

Malawi has exceptionally high rates of population growth (3.1%) and deforestation (2.4%), suggesting a Malthusian link between the two. The most important proximal cause of forest loss in Malawi has been the expansion of agricultural land. Population growth has been an important driver for this process, but is an insufficient explanation by itself. In Malawi’s case, it has been coupled with a l...