simple pore

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• simple seta — Shaft thin, usually naked, but sometimes with small denticles scattered over shaft; post annular part often bent at an angle; socket prominent; annulus sometimes not apparent; pore sometimes present [Ingle, 1992] …   Crustacea glossary

• Characterisation of pore space in soil — Soil is essential to most animals on the earth. It is a relatively thin crust where an even smaller portion contains much of the biological activity. Soil consists of three different phases. A solid phase (≈ 20%) that contains mainly minerals of… …   Wikipedia

• normal pore canals — (Class Ostracoda): Numerous perforations through valve with chemosensory and tactile sensilla, which communicate with nerve cells in the underlying epidermis; may be simple (open) or covered with sieve plates [Cohen, Peterson, and Maddocks, in… …   Crustacea glossary

• Constrictivity — is a dimensionless parameter used to describe transport processes (often molecular diffusion) in porous media. Constrictivity is viewed to depend on the ratio of the diameter of the diffusing particle to the pore diameter. The value of… …   Wikipedia

• Boyden chamber — Simple chamber used to test for chemotaxis, especially of leucocytes. Consists of two compartments separated by a millipore filter (3 8 m m pore size) ; chemotactic factor is placed in one compartment and the gradient develops across the… …   Dictionary of molecular biology

• fungus — fungic /fun jik/, adj. funguslike, adj. /fung geuhs/, n., pl. fungi /fun juy, fung guy/, funguses, adj. n. 1. any of a diverse group of eukaryotic single celled or multinucleate organisms that live by decomposing and absorbing the organic… …   Universalium

• rock — rock1 rockless, adj. rocklike, adj. /rok/, n. 1. a large mass of stone forming a hill, cliff, promontory, or the like. 2. Geol. a. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable… …   Universalium

• Rock — /rok/, n. a male given name. * * * I In geology, a naturally occurring and coherent aggregate of minerals. The three major classes of rock igneous, sedimentary, and metamorphic are based on the processes that formed them. These three classes are… …   Universalium

• PALÉOCYTOLOGIE — En mettant un terme à une longue période d’affirmations inexactes sur la génération spontanée des êtres vivants, certaines idées, parfois anciennes comme celles de F. Redi (1668), Schwammerdam, Fontenelle, jusqu’à celles de Lazzaro Spallanzani,… …   Encyclopédie Universelle

• reproductive system, animal — Introduction       any of the organ systems by which animals reproduce.       The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… …   Universalium

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium