Differential in Biological Definition

Evolution

... of inheritance 1.2.2 Mutation 1.3 differential survival of traits 1.3.1 Natural ... a single, very large scale mutation. differential survival of traits While mutation can create ... Natural selection Natural selection is based on differential survival and reproduction rates as a result of ...

Molecular evolution

... , in particular natural selection produced by differential mortality and fertility. differential mortality is the survival rate of individuals ... they survive, they are then selected further by differential fertility – that is, their total genetic ...

Operator

... 3.3 Operators in calculus 3.3.1 The differential operator 3.3.2 Integral operators ... functions , a common phenomenon in the theory of differential equations since there is no guarantee that the ... Many operators are linear. For example, the differential operator and Laplacian operator, which we will ...

Chromatography

... liquid or gas and separates it into its component parts as a result of differential distributions of the solutes as they flow around or over a stationary ... Various techniques for the separation of complex mixtures rely on the differential affinities of substances for a gas or liquid mobile medium and for a ...

Biomechanics

... concepts of physics, biomechanical mechanisms and structures can be simulated and studied. Relevant mathematical tools include linear algebra , differential equations , vector and tensor calculus , and computational techniques such as the finite element method. The study of biomaterials is of crucial ...

Full blood count

... Total white blood cells - All the white cell types are given as a percentage and as an absolute number per litre. A complete blood count with differential will also include: Neutrophil granulocytes - May indicate bacterial infection. Lymphocytes - Higher with some viral infections such as ...

Cancer

... conditions that are due to an active cancer, such as thrombosis or hormonal changes. Every single item in the above list has a substantial differential diagnosis (it may be associated with unrelated diseases). Often, cancer is an unexpected finding during investigation for much more common symptoms, ...

Equilibrium

... from lent books). An addiction is any of various forms of unbalanced behavior . In electricity , a balanced signal is also called a differential signal . Further reading Mechanical equilibrium: Marion & Thornton, Classical Dynamics of Particles and Systems. Fourth Edition, ...

Gene regulatory network

... of the models to be tested. Various modeling techniques have been used, including boolean networks , Petri nets , Bayesian networks , and sets of differential equations . Conversely, techniques have been proposed for generating models of GRNs that best explain a set of time series observations. ...

Gradient

... is, to the curve of constant height at that point. Formal definition The gradient is noted by: where ( nabla ) is the vector differential operator del , and φ is a scalar function. It is sometimes also written grad(φ). In 3 dimensions, the expression expands to in ...

Life

... due to chance . Descent with modification is sufficient by itself to allow evolution , assuming that the variations in the offspring allow for differential survival. The study of this form of heritability is called genetics . In all known life forms (assuming prions are not counted as such), the ...

Mathematical biology

... . C.U.P., 1991. ISBN 0521448557 P.G. Drazin, Nonlinear systems . C.U.P., 1992. ISBN 0521406684 D.W. Jordan and P. Smith, Nonlinear ordinary differential equations , 2nd ed. O.U.P., 1987. ISBN 0198565623 External references F. Hoppensteadt, Getting Started in Mathematical Biology . ...

Proteomics

... Antibody-based assays can also be used, but are unique to one protein. Protein quantification . Gel-based methods are used, including differential staining of gels with fluorescent dyes (difference gel electrophoresis ). Gel-free methods include various tagging or chemical modification methods, ...