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In biochemistry, a Ramachandran plot (also known as a Rama plot, a Ramachandran diagram or a [φ,ψ] plot), originally developed in 1963 by G. N. Ramachandran, C. Ramakrishnan, and V. Sasisekharan, [1] is a way to visualize energetically allowed regions for backbone dihedral angles ( also called as torsional angles , phi and psi angles ) ψ ...
RF is often evaluated in patients suspected of having any form of arthritis, even though positive results can be due to other causes and negative results do not rule out disease. In combination with signs and symptoms, it can play a role in both diagnosis and disease prognosis. It is part of the usual disease criteria of rheumatoid arthritis. [6]
[2] While the cause of rheumatoid arthritis is not clear, it is believed to involve a combination of genetic and environmental factors. [1] The underlying mechanism involves the body's immune system attacking the joints. [1] This results in inflammation and thickening of the joint capsule. [1] It also affects the underlying bone and cartilage. [1]
A flame test involves introducing a sample of the element or compound to a hot, non-luminous flame and observing the color of the flame that results. [4] The compound can be made into a paste with concentrated hydrochloric acid, as metal halides, being volatile, give better results. [5] Different flames can be tried to verify the accuracy of ...
Immunology is a branch of biology and medicine [1] that covers the study of immune systems [2] in all organisms.. Immunology charts, measures, and contextualizes the physiological functioning of the immune system in states of both health and diseases; malfunctions of the immune system in immunological disorders (such as autoimmune diseases, hypersensitivities, [3] immune deficiency, [4] and ...
The RAQoL was developed by Galen Research, the University of Leeds and the Academic Hospital Maastricht, and was first published in 1997. [5] It was the first patient completed quality of life questionnaire that focused on rheumatoid arthritis [6] and is distinct from other questionnaires as it includes physical contact as a dimension of quality of life. [3]
ACR score is a scale to measure change in rheumatoid arthritis symptoms. [1] It is named after the American College of Rheumatology. The ACR score is more often used in clinical trials than in doctor patient-relationships, as it allows a common standard between researchers. Different degrees of improvement are referred to as ACR20, ACR50, ACR70.
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...