What's the difference between sessile and stalkless?
Sessile
Definition:
(a.) Attached without any sensible projecting support.
(a.) Resting directly upon the main stem or branch, without a petiole or footstalk; as, a sessile leaf or blossom.
(a.) Permanently attached; -- said of the gonophores of certain hydroids which never became detached.
Example Sentences:
(1) These 87 adenomas were mostly (79%) under 5 mm in diameter, sessile (89%) and histologically tubular with slight dysplasia (95%).
(2) We classify the hernias as pedunculated or sessile, with associated factors such as viability of herniated brain, infection, CSF leak, and neurologic complications.
(3) Two hundred and fifty colonoscopy procedures were reviewed, revealing 87 sessile colon polyps ranging from 0.5-6.0 cm.
(4) Traditional elastomeric impression materials, four recently developed "hydrophilic" silicones and a hydrocolloid have been tested for their accuracy of reproduction by use of indirect measurements via plaster dies and for their wettability by means of the sessile drop method.
(5) In flow-through microcosms RC-4(pSI30), undetectable as free-living cells, was found by enrichment as irreversibly bound sessile forms.
(6) Endoscopic resection of large sessile adenomas can be safe and effective.
(7) Pieces of Douglas fir and polyvinyl chloride were colonized in a recirculating system and the comparative efficacy of two biocides (Bronopol and Kathon) against the sessile and planktonic populations was examined.
(8) A 44-year-old woman was found to have a sessile lesion replacing most of her endometrium and endocervical mucosa, consisting of an intimate admixture of endometrial glands, endometrial stroma, and smooth muscle.
(9) Microscopically, they varied from complex papillary to sessile nodular growths.
(10) In the various tested situations in which the migration of cells to lymph nodes was inhibited, it seemed to be the relationship of the cell surfaces of the sessile and circulating cells which played an important role in the outcome of their interactions.
(11) This role includes many facets of immunity such as the effects of antigen specificity, immunologic memory, differential behavior of recirculating or sessile populations, and local and systemic contact between antigen and effector cells.
(12) The mineralization activity of sessile catheter-associated bacteria was unaffected by four hr.
(13) The expression of HLA-DR, HLA-DP and HLA-DQ antigens and of the associated invariant chain (Ii) was studied immunohistologically in sessile cells of normal ileum and ileum affected by Crohn's disease which was taken as a model for chronic inflammation.
(14) Large polyps are sessile or pedunculated lesions that are larger than or equal to 3 cm in size.
(15) Evidence is presented that upon stimulation with endotoxin (lipopolysaccharide, LPS), Kupffer cells, the body's largest pool of sessile macrophages, synthesize and liberate a factor whose immunological, cytotoxic and chemical properties are those described for tumor necrosis factor (TNF)-alpha.
(16) We have devised a modification of the sessile drop method for making the required measurements.
(17) Depending on three related factors (increasing size, a sessile rather than pedunculated mode of growth, and a villous rather than tubular microscopic architecture), one may find minute (1 to 2-mm) or microcancer with increasing frequency in adenomas.
(18) and Dolichoderinae (Tapinoma sessile, Conomyrma insana, Conomyrma wheeleri).
(19) B lymphocyte development occurs in the intersinusoidal spaces of bone marrow in association with a sessile population of stromal cells.
(20) When the results for five strains were studied by analysis of variance at 6 and 24 h, the main variable was the antibiotic concentration, followed by the culture conditions, e.g., planktonic or sessile bacteria, the strain tested, and the time of contact.
Stalkless
Definition:
(a.) Having no stalk.
Example Sentences:
(1) Two-dimensional echocardiography disclosed a mobile high density stalkless mass having several areas of low density.
(2) From these results, it is suggested that swarmer cells undergo transition to cells of a stalked-cell nature without stalk formation and that the cell cycle of the stalkless mutant proceeds in an ordered sequence similar to that defining the wild-type cell cycle.
(3) Antibodies were also seen to bind to the body of stalkless subunits, in a region near the COOH-terminal sites.
(4) The stalkless mutants grew at a generation time similar to that of the wild-type strain at 30 degrees C. Cell size and morphology of a stalkless mutant, C. crescentus CB13 pdr-819, were also similar to those of the wild-type strain, except for the absence of a stalk.
(5) The same antibody was used to place two additional determinants at the periphery of stalkless subunits, in an area from which a stalk might be expected to project.
(6) These stalkless mutants were resistant simultaneously to both DNA and RNA phages and did not possess pili and DNA pendent stalkless mutants.
(7) Stalkless forms were by far the most common type and we believe they provide the motive force for cell movement.