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Specific-pathogen-free (SPF) is a term used for laboratory animals that are guaranteed free of particular pathogens. Use of SPF animals ensures that specified diseases do not interfere with an experiment. For example, absence of respiratory pathogens such as influenza is desirable when investigating a drug's effect on lung function.
Unsigned, the painting is attributed to de Arellano due to the wide variety of flowers scientifically portrayed, the precise underdrawing and the quite free arrangement of them with the petals (especially those of the red and white tulip at bottom left) seemingly troubled by a breeze, though the inclusion of a dahlia and orange blossom is rare ...
Flower: Rocky Mountain columbine [12] Aquilegia coerulea: April 4, 1899 SB 261-1899 CRS 24-80-905 [1] Grass: Blue grama grass [13] Bouteloua gracilis: May 20, 1987 SJR13-1987 Insect: Colorado hairstreak butterfly [14] Hypaurotis crysalus: April 17, 1996 SB 122-1996 CRS 24-80-913 [1] Mammal: Rocky Mountain bighorn sheep [15] Ovis canadensis ...
(glorious and free) Provincial grass: big bluestem, fossil: Tylosaurus pembinensis, soil: Newdale soil (Orthic Black Chernozem) New Brunswick [5] Black-capped chickadee – – Purple violet: Balsam fir – Spem reduxit (hope was restored) Provincial soil: Holmesville, Salmon Fly: Picture Province [6] Newfoundland and Labrador [7]
Media in category "Images of butterflies and moths" This category contains only the following file. Plate II Kallima butterfly from Animal Coloration by Frank Evers Beddard 1892.jpg 1,695 × 2,722; 1.77 MB
Specific-pathogen-free, laboratory animals known to be without pathogens; Superplastic forming, of sheet metal; Space Power Facility, a NASA test facility; S-phase-promoting factor, in biology; Formal spectrum of a ring, a construction in algebraic geometry; Spray polyurethane foam, a building insulation material; Spruce-pine-fir, mixed ...
In the Victorian language of flowers, sweet william symbolizes gallantry. The plant is widely used in borders, rock gardens and informal country cottage style gardens. Sweet William is a good candidate for a naturalistic garden because its nectar attracts birds, bees, and butterflies. Its flowers are considered edible.
Phoebis sennae, the cloudless sulphur, is a mid-sized butterfly in the family Pieridae found in the Americas. There are several similar species such as the clouded sulphur ( Colias philodice ), the yellow angled-sulphur ( Anteos maerula ), which has angled wings, the statira sulphur ( Aphrissa statira ), and other sulphurs , which are much smaller.