What's the difference between cocoon and envelop?

Cocoon


Definition:

  • (n.) An oblong case in which the silkworm lies in its chrysalis state. It is formed of threads of silk spun by the worm just before leaving the larval state. From these the silk of commerce is prepared.
  • (n.) The case constructed by any insect to contain its larva or pupa.
  • (n.) The case of silk made by spiders to protect their eggs.
  • (n.) The egg cases of mucus, etc., made by leeches and other worms.

Example Sentences:

  • (1) Abdominal cocoon is rare, only 31 cases reported in the literature.
  • (2) There is effective use of a scuba-like neoprene fabric which is slickly practical and gives a bold, shell-like silhouette to hooded coats and to sweatshirts which seems to reference the balloon and cocoon shapes that Cristobal Balenciaga invented to great acclaim in the 1950s.
  • (3) The pitch on which Iceland train, favoured in the past by Monaco and Nantes for summer getaways, sits beneath Mont Veyrier and is cocooned a few hundred metres from pristine lakeside beaches and disrobed holidaymakers.
  • (4) The nonsoluble degradation products formed a cocoon encapsulating the now smaller specimen.
  • (5) A single preincubational exposure of silkworm eggs to a dose of 2 Gy increases the mass of larvae as well as the cocoon shell weight, silk-bearing and the raw silk production.
  • (6) For copper and dichloroaniline earthworms did recover cocoon production to a level as high as the control level or even higher; in case of pentachlorophenol, cocoon production was still reduced after 3 weeks in clean soil.
  • (7) The abnormalities at laparotomy were impressive, with a gross proliferation of the visceral peritoneum which formed a dense white cocoon which encased, constricted and markedly shortened the small bowel, usually from the duodenojejunal flexure to the ileocaecal valve.
  • (8) After the spinning of the cocoon, the cells are lysed and disappear entirely at the nymphal stage.
  • (9) The exposed adult females formed cocoons but no larvae hatched from them.
  • (10) By making a fibrin cocoon, the anastomosis can be insulated.
  • (11) After years of wearing a facemask and grabbing all the covers to cocoon myself against the light while he reads, we have made two changes that have transformed everything.
  • (12) The specificity of this antibody to the purified cocoon protein has suggested strong immunoreactivity up to a titre of 1:5000 dilution of the antibody.
  • (13) After a promising start it appears this press conference has degenerated into its usual cocoon of flaky stuff.
  • (14) The crystalline material covering the cocoon of Malacosoma neustria testacea (Lasiocampidae, Lepidoptera) was analyzed physically and chemically.
  • (15) No mature cockroaches from larvae exposed to AG-5, no hatching from cocoons lied by treated adults were observed.
  • (16) As we left the intimate cocoon of the pub, my bouncy excitement became more of a trudge as, heart in mouth, I babbled and swore, and panicked that I couldn't do it, terrified that stage fright and nerves would overtake me, and that my tentative voice would abandon me altogether.
  • (17) The analysis of the cocoon showed that it was made of a silica-rich layer containing also calcium and phosphorus.
  • (18) Acid-base and electrolyte balance do not reach a new equilibrium within 1 yr in the cocoon.
  • (19) Electrophoretograms of reduced samples of secretion collected from either actively feeding or "cocoon"-building animals showed an electrophoretic pattern containing up to six of the 25 protein fractions detected in salivary gland samples, with varied amounts of these same six proteins in electrophoretograms of secretion samples from a given stage.
  • (20) You’re really into your own little cocoon, because you have such massive protection that you really can’t go anywhere.

Envelop


Definition:

  • (v. t.) To put a covering about; to wrap up or in; to inclose within a case, wrapper, integument or the like; to surround entirely; as, to envelop goods or a letter; the fog envelops a ship.
  • (n.) That which envelops, wraps up, encases, or surrounds; a wrapper; an inclosing cover; esp., the cover or wrapper of a document, as of a letter.
  • (n.) The nebulous covering of the head or nucleus of a comet; -- called also coma.
  • (n.) A work of earth, in the form of a single parapet or of a small rampart. It is sometimes raised in the ditch and sometimes beyond it.
  • (n.) A curve or surface which is tangent to each member of a system of curves or surfaces, the form and position of the members of the system being allowed to vary according to some continuous law. Thus, any curve is the envelope of its tangents.
  • (n.) A set of limits for the performance capabilities of some type of machine, originally used to refer to aircraft. Now also used metaphorically to refer to capabilities of any system in general, including human organizations, esp. in the phrase push the envelope. It is used to refer to the maximum performance available at the current state of the technology, and therefore refers to a class of machines in general, not a specific machine.

Example Sentences:

  • (1) The oral nerve endings of the palate, the buccal mucosa and the periodontal ligament of the cat canine were characterized by the presence of a cellular envelope which is the final form of the Henle sheath.
  • (2) Sequence variation in the gp116 component of cytomegalovirus envelope glycoprotein B was examined in 11 clinical strains and compared with variation in gp55.
  • (3) Thus, although ferric-enterochelin cannot penetrate the cell surface from outside, the complex that is formed within the envelope is transported normally into the cell.
  • (4) In addition, transitional macrophages with both positive granules and positive RER, nuclear envelope, negative Golgi apparatus (as in exudate- resident macrophages in vivo), and mature macrophages with peroxidatic activity only in the RER and nuclear envelope (as in resident macrophages in vivo) were found.
  • (5) Studies using serum from mice that had been immunized with synthetic peptides from the HIV envelope region suggested that this response is directed, at least in part, at several determinants of the transmembrane portion of the HIV envelope glycoprotein.
  • (6) The influence of exogenous gangliosides on the structure of the viral envelope was studied using fluorescent and photoactivatable phospholipids incorporated into the viral membrane.
  • (7) Cells infected with enveloped viruses are good systems for studying both aspects of protein glycosylation, since they contain a limited number of different glycoproteins, often with well-defined functions.
  • (8) The enzyme was removed from the cell envelope by treatment of the whole cells with sodium dodecyl sulfate, Triton X-100, sodium deoxycholate, and proteinase K.
  • (9) After virus release the major portion of precursors is assembled within an approximately 25 nm thick layer directly attached to the envelope.
  • (10) This single substitution was sufficient to abolish all detectable cleavage of the gp160 envelope precursor polypeptide as well as virus infectivity.
  • (11) The envelope glycoprotein of human immunodeficiency virus consists of two subunits, designated gp120 and gp41, derived from the cleavage of a precursor polypeptide gp160.
  • (12) Lipopolysaccharide content correlated significantly with drug uptake and sensitivity, and it appeared to determine the degree of penetration of the cell envelope by these chlorinated phenols.
  • (13) Matrix protein (36,500 daltons), one of the major polypeptides of the Escherichia coli cell envelope, is arranged in a periodic monolayer which covers the outer surface of the peptidoglycan.
  • (14) Translation of mRNA encoding vesicular stomatitis virus envelope glycoprotein G by as membrane-free ribosomal extract obtained from HeLa cells yielded a nonglycosylated protein (G1 (Mr 63,000).
  • (15) For both the single- and multiple-band signals, performance was best when the signal band(s) had a different envelope from the common envelope of the cue bands, and performance was worst when either the cue bands all had different envelopes, or the signal and cue bands all shared the same envelope.
  • (16) The data collected by several approaches reveal that assembly and maturation of vaccinia involves a tightly coupled sequence of interrelated events including the assembly of the envelope, post-translational cleavage of several virion polypeptides, and induction of the core enzymes.
  • (17) The relationship of vaccinia haemagglutinin (HA) to extracellular enveloped virus (EEV) was examined.
  • (18) April 17, 2013 The third floor isn't doing so well either: Rebecca Berg (@rebeccagberg) Capitol police email Senate offices: Police "are responding to a suspicious envelope on the third floor of the Hart Senate Office Building."
  • (19) Several fractions were extracted from the cell envelope (CE) of Neisseria meningitidis group B and characterized with regard to their morphology, antigenicity, protein composition, and toxicity.
  • (20) This preactivated merocyanine 540 was then mixed (in the dark) with tumour cells, normal cells and envelope viruses to assess its antiproliferative activity.