What's the difference between rigid and rigorous?

Rigid


Definition:

  • (a.) Firm; stiff; unyielding; not pliant; not flexible.
  • (a.) Hence, not lax or indulgent; severe; inflexible; strict; as, a rigid father or master; rigid discipline; rigid criticism; a rigid sentence.

Example Sentences:

  • (1) By the 1860s, French designs were using larger front wheels and steel frames, which although lighter were more rigid, leading to its nickname of “boneshaker”.
  • (2) Diphenoxylate-induced hypoxia was the major problem and was associated with slow or fast respirations, hypotonia or rigidity, cardiac arrest, and in 3 cases cerebral edema and death.
  • (3) Pitlike surface structures seen in negatively stained whole cells and thin sections were correlated with periodically spaced perforations of the rigid sacculus.
  • (4) Rigidly fixing the pubic symphysis stiffened the model and resulted in principal stress patterns that did not reflect trabecular density or orientations as well as those of the deformable pubic symphysis model.
  • (5) The fracture can be treated arthroscopically by rigid internal fixation, while at the same time treating possible associated lesions.
  • (6) This study examined the extent to which normal learners identified as cognitively rigid could use alternate strategies when instructed to do so.
  • (7) In some patients stimulation can reduce rigidity and coactivation of muscles immediately or slowly over days or months.
  • (8) Major alleviation of the rigidity and bradykinesia with chronic oral l-dopa therapy was not accompanied by any change in the silent period.
  • (9) At clinically achievable concentrations, the combination of nafcillin plus gentamicin produced enhanced killing against 13 of 14 strains of enterococci and was synergistic (by very rigid criteria) against 10 of 14 strains.
  • (10) Low-temperature NMR studies indicate that 5 is more rigid than tamoxifen; interconversion between enantiomeric conformers is slow on the NMR time scale at -75 degrees C.
  • (11) Global 'abnormality', hunching (rigid arching of back), hindlimb abduction, forepaw myoclonus, stereotyped lateral head movements, backing, and immobility occurred significantly only in drug-treated rats.
  • (12) A study was made of twelve cases with uveitis, glaucoma and hyphema (UGH) caused by rigid intraocular posterior chamber implants.
  • (13) Eight alpha-helices behave as relatively rigid bodies and corner regions are more flexible, showing larger fluctuations.
  • (14) This modification allows for precision of movement, ease of repositioning, and adaptation of rigid skeletal stabilization of mobilized osseous segments in the chin.
  • (15) The pedicle screw systems were always the most rigid.
  • (16) Lactate dehydrogenase (LDH) levels and subunit isozyme patterns in cornea were monitored in 36 albino rabbits wearing thick, rigid, gas-permeable contact lenses for periods of 24 h, 2 and 7 days, and 1 and 3 months.
  • (17) The prevalence of sleep apnea, apnea index, duration of the longest episode of apnea, and penile rigidity were tabulated.
  • (18) During the last 21 months, 12 additional children have been managed with a more stringent protocol combining neck immobilization in a rigid cervical brace for 3 months and restriction of both contact and noncontact sports, together with a major emphasis on patient compliance.
  • (19) In the second placebo controlled experiment 150 mg im testosterone enanthate administration was associated with enhanced rigidity of NPT but with no effect on frequency or circumference change of NPT and no effect on frequency of REM.
  • (20) The whole isolator system included two rigid supply isolators, too.

Rigorous


Definition:

  • (a.) Manifesting, exercising, or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.
  • (a.) Severe; intense; inclement; as, a rigorous winter.
  • (a.) Violent.

Example Sentences:

  • (1) He added: "There is a rigorous review process of applications submitted by the executive branch, spearheaded initially by five judicial branch lawyers who are national security experts and then by the judges, to ensure that the court's authorizations comport with what the applicable statutes authorize."
  • (2) Upon depletion of ATP in contraction, the P2 intensity reverted to the original rigor level, accompanied by development of rigor tension.
  • (3) which suggest that ~60-90% of the cross-bridges attached in rigor are attached in relaxed fibers at an ionic strength of 20 mM and ~2-10% of this number of cross-bridges are attached in a relaxed fiber at an ionic strength of 170 mM.
  • (4) The symptoms were successfully controlled by rigorous dietary measures.
  • (5) Rigorously designed clinical trials have demonstrated the efficacy and safety of fluoxetine in adults with major depressive disorder and obsessive-compulsive disorder (OCD) but not in patients below 18 years old.
  • (6) Unambiguous mapping and rigorous determination of the nature of the initiation triplet for IF2 beta, the smaller form of IF2, is critical for future mutagenesis of this codon, required for investigating the biological importance of both IF2 alpha and IF2 beta.
  • (7) The identification of the cDNA for an A2b-adenosine receptor will allow more rigorous characterization of its anatomical distribution and functional properties.
  • (8) Meanwhile, we need to show that the recent changes to how we work with the BBC Executive are allowing us to be more focused, more rigorous and more transparent in the work that we do, so that licence fee payers can get a better BBC.
  • (9) A village will be subject to rigorous evaluations in order to demonstrate sustainability and scalability, and that aid developed with an exit strategy can actually work.
  • (10) We therefore conclude that in postrigor muscles, paratropomyosin is released from the A-I junction region following the increase in the sarcoplasmic calcium ion concentration to 10(-4) M, and then binds to thin filaments, which results in weakening of rigor linkages formed between actin and myosin.
  • (11) New observations include: (1) In 15 nm cross sections that show single 14.5 nm levels: (a) The flared X structure characteristic of rigor is replaced by a straight-X figure in which the crossbridge density is aligned along the myosin-actin plane, rather than skewed across it as in rigor.
  • (12) Ferguson’s influence at Old Trafford has clearly waned since the Moyes appointment but, notably, there is no admission on his part that he chose the wrong man, insisting that the club followed a rigorous and methodical selection process.
  • (13) After a three-month period of rigorous training, two PAs were assigned to the ICU.
  • (14) Over the last few days a former member of parliament's intelligence and security committee, Lord King, a former director of GCHQ, Sir David Omand, and a former director general of MI5, Dame Stella Rimington, have questioned whether the agencies need to be more transparent and accept more rigorous scrutiny of their work.
  • (15) Even when carried out rigorously, culling does very little to help.
  • (16) Because the rigor of the present day "scientific method" demands clearcut and reproducible results and investigations require predictable performance of the parasite in an evenly maintained host that is in a highly constrained environment, we should not wonder why we cannot produce the events of nature.
  • (17) The best definition of osteoarthritis is anatomical, but to be rigorous must include the biochemical characteristics of osteoarthritis cartilage.
  • (18) "We remain committed to sourcing merchandise that is produced responsibly by suppliers that adhere to Walmart's rigorous Standards for Suppliers code of conduct."
  • (19) Edelman has a rigorous in-house carbon accounting system.
  • (20) Material, obtained by a rigorous three-stage sampling procedure from five normal rat livers, is systematically subjected to this analysis at four levels of magnification.