The microorganisms occurring in a defined site or environment.

Transfer of microorganisms between parent and offspring. Evidence of transfer does not by itself demonstrate host benefit or genetic determination of the transfer.

Introduction of a specified microbial preparation into a recipient or environment. Dose, viability and medium controls affect interpretation.

An experiment using hosts with a defined microbial status. Sterility or known community composition must be verified rather than assumed after treatment.

A component of the outer membrane of Gram-negative bacteria used in experimental immune challenges. It induces host responses without constituting a replicating infection.

A molecule involved in iron acquisition. Secreted forms can generate social effects when other cells can use the bound iron.

An organization publishing internationally coordinated formulations and reference data for the physical properties of water and steam.

Official website: iapws.org

The measurand is the quantity intended to be measured, specified with enough detail about the system, conditions and averaging convention to distinguish it from instrument output or a different derived quantity.

measurement accuracy concerns closeness to the value of the specified measurand; high repeatability alone does not establish it. calibration, an adequate response model and assessment of residual systematic effects are required alongside statistical precision.

For a positive integer $N$, a point source in a grounded planar wedge of opening $\pi /N$ can be supplemented by $2N-1$ images. Keep positive sources at $z_0{e}^{2\pi ik/N}$ and negative sources at $\overline{z_0}{e}^{2\pi ik/N}$, $k=0,\dots ,N-1$, counting the actual source as the first positive one. Reflection in either boundary pairs equal distances with opposite signs, so the logarithmic electrostatic potential vanishes on both rays. Every image lies outside the open physical wedge.

The identity ${\prod }_k(z-z_0{e}^{2\pi ik/N})=z^N-z_0^N$ compresses the image sum toHere the normalization is that of a two-dimensional point source, equivalently a charge per unit length in a translationally invariant three-dimensional problem. For $N=3$, a source on the bisector with unit radius has $z_0^3=i$, giving the ratio $(z^3-i)/(z^3+i)$. The method of images works finitely here because successive boundary reflections generate a finite rotation group; arbitrary wedge angles need not have a finite image construction.

With no imposed external field, a line of charge density $\lambda$ at height $h$ above a conducting plane has an image $-\lambda$ a distance $2h$ away. The force per unit length is $-{\lambda }^2\hat{\mathbf{z}}/(4\pi {ϵ}_{0}h)$. It is always attractive. The image field gives the force directly; a factor one-half used in some image-energy calculations does not multiply this force.

A real infinite line charge $\lambda$ lies at distance $b>a$ from the axis of a grounded conducting cylinder of radius $a$. An image line $-\lambda$ at radius $a^2/b$ lies inside the excluded conductor. On the circle, real and image distances obey $r_1/r_2=b/a$, so $\varphi =(\lambda /(2\pi {ϵ}_0))\ln [(b/a)r_2/r_1]$ vanishes there. The image field solves the physical exterior problem with bounded far potential. Its additive constant matters; the interior image field is not a physical field inside the conductor.

Conversion of sulfate to activated derivatives used in subsequent metabolic reactions. Its compartmentalization in Entamoeba histolytica mitosomes demonstrates lineage-specific retention of organellar function.

Quantitative analysis of how local changes in reaction capacities alter steady-state metabolic fluxes and concentrations. Its sensitivities depend on the operating condition rather than identifying one invariant limiting step.

Production of metabolic heat sufficient to contribute substantially to body-temperature regulation. It is not synonymous with constant temperature, and similar thermophysiology does not by itself identify a clade.

A growth pattern with successive utilization of substrates separated by an adaptation interval. Glucose followed by lactose is a classic example, but timing depends on culture conditions and transport regulation.

A coupled reaction and transport system transferring reducing equivalents between cytosol and mitochondrial matrix without transporting NADH itself across the inner membrane.

A route transferring cytosolic reducing equivalents through glycerol-phosphate dehydrogenases to mitochondrial electron transport. Its entry point differs from matrix NADH oxidation.

A standardized minimum metabolic rate measured under stated resting, postabsorptive and thermal conditions; it is not interchangeable with maximum aerobic performance.

Formation of biological molecules through enzyme-catalysed metabolic reactions.