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Difference density maps are usually calculated using Fourier coefficients which are the differences between the observed structure factor amplitudes from the X-ray diffraction experiment and the calculated structure factor amplitudes from the current model, using the phase from the model for both terms (since no phases are available for the ...
Technicians preparing a body for cryopreservation in 1985. Cryonics (from Greek: κρύος kryos, meaning "cold") is the low-temperature freezing (usually at −196 °C or −320.8 °F or 77.1 K) and storage of human remains in the hope that resurrection may be possible in the future.
Nitrogen is a liquid under −195.8 °C (77.3 K).. In physics, cryogenics is the production and behaviour of materials at very low temperatures.. The 13th International Institute of Refrigeration's (IIR) International Congress of Refrigeration (held in Washington DC in 1971) endorsed a universal definition of "cryogenics" and "cryogenic" by accepting a threshold of 120 K (−153 °C) to ...
Cryogenically preserved samples being removed from a dewar of liquid nitrogen. Cryopreservation or cryoconservation is a process where biological material - cells, tissues, or organs - are frozen to preserve the material for an extended period of time. [1]
Since the first description of cryoglobulinemia in association with the clinical triad of skin purpura, joint pain, and weakness by Meltzer et al. in 1966, [4] [5] the percentage of cryoglobulinemic diseases described as essential cryoglobulinemia or idiopathic cryoglobulinemia (that is, cryoglobulinemic disease that is unassociated with an underlying disorder) has fallen.
A glacial cryoseism or glacial ice quake is a non-tectonic seismic event of the glacial cryosphere.A large variety of seismogenic glacial processes arising from internal, ocean calving, or basal processes have been identified and studied.
Cryotherapy, sometimes known as cold therapy, is the local or general use of low temperatures in medical therapy.Cryotherapy can be used in many ways, including whole body exposure for therapeutic health benefits or may be used locally to treat a variety of tissue lesions.
Cryofixation is a technique for fixation or stabilisation of biological materials as the first step in specimen preparation for the electron microscopy and cryo-electron microscopy. [1] Typical specimens for cryofixation include small samples of plant or animal tissue , cell suspensions of microorganisms or cultured cells , suspensions of ...