What's the difference between instar and stage?

Instar


Definition:

  • (v. t.) To stud as with stars.

Example Sentences:

  • (1) After treatment of larvae of instar 1 at preimago stages about 77% of the insects died.
  • (2) We detail the fatty acid compositions of last larval instars of two lepidopterans, Spodoptera frugiperda and Trichoplusia ni, two tissues from T. ni, a cell line derived from each species and the respective larval and cell culture media.
  • (3) Statistical analysis has shown the following: a) the growth inhibition, which is especially distinct in autumn-spring generation, takes place in the Ist instar larvae 1.76-2.20 mm long inhabiting the walls of the nasal cavity and concha (their average body length at hatching is 1.08 plus or minus 0.004 mm); the inhibition is associated with interpopulation relations and apparently does not depend on the date of its beginning and can last from 6 to 7 months; c) after the growth resumption the development continues uninterruptedly up to the moulting; the inhibition is also possible at the beginning of the 2nd instar and then the development proceeds without any intervals up to the complete maturation of larvae.
  • (4) A growth-blocking peptide (GBP) with repressive activity against juvenile hormone (JH) esterase has been isolated from the last (6th) instar larval plasma of the armyworm Pseudaletia separata (Lepidoptera: Noctuidae) parasitized by the parasitoid wasp Apanteles kariyai (Hymenoptera: Braconidae) (1,2).
  • (5) There are 4-5 replication rounds in the 1st instar, 2-3 rounds in the 2nd instar, the 3rd and the 4th instars have 1-2 rounds each.
  • (6) A preliminary behavioral assessment of late 3rd instar larvae exposed to 1.42 ppm suggests that these plant extracts produce 80% mortality after only 4-5 h of contact.
  • (7) Male genital imaginal discs from old (late-third-instar) larvae of Drosophila that had been X-irradiated with appropriate doses developed into severely damaged adult genitalia when implanted into old larvae, but they developed into completely normal adult genitalia when transplanted into 2-day-younger larvae.
  • (8) Thus it appears that a cerebral neuropeptide specifically inhibiting JH I synthesis by the CA is present in Manduca on day 4 of the last larval instar, a time when the hemolymph titer of JH must drop to ensure the occurrence of pupal commitment.
  • (9) A sharp rise in trehalose level of haemolymph is observed towards the end of 4th instar accompanied with sudden fall of the sugar in fat body during the same period, but after moulting blood trehalose abruptly decreases.
  • (10) CC-CA of the late VIth instar (VI3) larvae were used for assessment of ATTH.
  • (11) Two boys with ophthalmomyiasis caused by the first instar larva of the reindeer warble fly Hypoderma tarandi are reported.
  • (12) Genetic information on 25 enzyme polymorphisms in Drosophila subobscura, the location of corresponding genes, and cytological and genetic maps of the chromosomes are presented, as well as photographic maps of the salivary gland chromosomes in the third instar larva and white-case early pupal stages.
  • (13) The allatectomy in the 4th instar larvae of Rhodnius prolixus stops moulting in 93 per cent of the cases.
  • (14) Dormant neuroblasts are found adjacent to the neuropil in late embryos and early first instar larvae.
  • (15) Second instar larvae which survive the molt exhibit a marked reduction in growth and eventually die as small second instar larvae.
  • (16) Extremely high concentrations of Vg were observed in the hemolymph of female nymphs (fourth instar), particularly engorged nymphs, treated with CyM (10 micrograms).
  • (17) Studies on the endurance to starvation by the immatures of T. splendens showed that the III instar larvae survived longer than the I and II instar larvae.
  • (18) The larval brain and proventriculus in awdb3 homozygous third-instar larvae appear to be vacuolated due to the accumulation of lipid droplets.
  • (19) mortality was high), while the nymphal instars showed an adverse effect on ecdysis and adults which emerged from the treated last nymphal instar were characterized by high mortality, abnormal behaviour and reduced fecundity and viability.
  • (20) In third instar larvae, high levels of mRNA could be observed in brain, imaginal discs, and in salivary glands.

Stage


Definition:

  • (n.) A floor or story of a house.
  • (n.) An elevated platform on which an orator may speak, a play be performed, an exhibition be presented, or the like.
  • (n.) A floor elevated for the convenience of mechanical work, or the like; a scaffold; a staging.
  • (n.) A platform, often floating, serving as a kind of wharf.
  • (n.) The floor for scenic performances; hence, the theater; the playhouse; hence, also, the profession of representing dramatic compositions; the drama, as acted or exhibited.
  • (n.) A place where anything is publicly exhibited; the scene of any noted action or carrer; the spot where any remarkable affair occurs.
  • (n.) The platform of a microscope, upon which an object is placed to be viewed. See Illust. of Microscope.
  • (n.) A place of rest on a regularly traveled road; a stage house; a station; a place appointed for a relay of horses.
  • (n.) A degree of advancement in a journey; one of several portions into which a road or course is marked off; the distance between two places of rest on a road; as, a stage of ten miles.
  • (n.) A degree of advancement in any pursuit, or of progress toward an end or result.
  • (n.) A large vehicle running from station to station for the accomodation of the public; a stagecoach; an omnibus.
  • (n.) One of several marked phases or periods in the development and growth of many animals and plants; as, the larval stage; pupa stage; zoea stage.
  • (v. t.) To exhibit upon a stage, or as upon a stage; to display publicly.

Example Sentences:

  • (1) CT appears to yield important diagnostic contribution to preoperative staging.
  • (2) Increased plasmin activity was associated with advancing stage of lactation and older cows after appropriate adjustments were made for the effects of milk yield and SCC.
  • (3) The intrauterine mean active pressure (MAP) in the nulliparous group was 1.51 kPa (SD 0.45) in the first stage and 2.71 kPa (SD 0.77) in the second stage.
  • (4) These cells contained organelles characteristic of the maturation stage ameloblast and often extended to the enamel surface, suggesting a possible origin from the ameloblast layer.
  • (5) When TSLP was pretreated with TF5 in vitro, the most restorative effects on the decreased MLR were found in hyperplastic stage and the effects were becoming less with the advance of tumor developments.
  • (6) Microelectrodes were used to measure the oxygen tension (PO2) profile within individual spheroids at different stages of growth.
  • (7) Measurement of urinary GGT levels represents a means by which proximal tubular disease in equidae could be diagnosed in its developmental stages.
  • (8) The stages of mourning involve cognitive learning of the reality of the loss; behaviours associated with mourning, such as searching, embody unlearning by extinction; finally, physiological concomitants of grief may influence unlearning by direct effects on neurotransmitters or neurohormones, such as cortisol, ACTH, or norepinephrine.
  • (9) 53 outpatients with HIV-infection classified according to the Walter Reed staging system (WR1 to WR6).
  • (10) In the stage 24 chick embryo, a paced increase in heart rate reduces stroke volume, presumably by rate-dependent decrease in passive filling.
  • (11) Small pieces of anterior and posterior quail wing-bud mesoderm (HH stages 21-23) were placed in in vitro culture for up to 3 days.
  • (12) The possibility that both IL 2 production and IL 2R expression are autonomously activated early in T cell development, before acquisition of the CD3-TcR complex, led us to study the implication of alternative pathways of activation at this ontogenic stage.
  • (13) Survival was independent of the type of clinical presentation and protocol employed but was correlated with the stage (P less than 0.0005), symptoms (P less than 0.025), bulky disease (P less than 0.025) and bone marrow involvement (P less than 0.025).
  • (14) Many thoracic motoneurons were able to survive up to posthatching stages following transplantation.
  • (15) An inverse relationship between the pumping capacity of the heart and vascular resistance was confirmed at different stages of examination and treatment of the patients.
  • (16) Cook, who has postbox-red hair and a painful-looking piercing in his lower lip, was now on stage in discussion with four fellow YouTubers, all in their early 20s.
  • (17) This experimental system allows separation of three B lymphocyte developmental stages: early differentiation in vitro, progression to IgM secretion in vivo, and late differentiation dependent upon mature T lymphocytes in vivo.
  • (18) Congenitally deficient plasmas were used as the substrate for the measurement of procoagulant activities in a one-stage clotting assay.
  • (19) It has announced a four-stage programme of reforms that will tackle most of these stubborn and longstanding problems, including Cinderella issues such as how energy companies treat their small business customers.
  • (20) Residual cancer was found in the radical prostatectomy specimen in 11 of the 29 stage-A1 patients (38%) and in 66 of the 86 stage-A2 patients (77%).