(n.) The hard substratum. Same as Hard pan, under Hard, a.
Example Sentences:
(1) The hardpan bases around most turbines bear the telltale marks of sheep encampment.
Impervious
Definition:
(a.) Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.
Example Sentences:
(1) Placement of impervious knitted Dacron velour aortic grafts in baboons reproduced platelet consumption that progressively normalized over six weeks postoperatively.
(2) Below-zero temperatures crowned the top of the US from Idaho to Minnesota, where many roads still had an inch-thick plate of ice, polished smooth by traffic and impervious to ice-melting chemicals.
(3) There is all sorts of opacity which makes it easy for an employee to suffer retaliation.” Despite recent reforms to improve transparency and accountability, the organisation remains impervious to public scrutiny, with no established mechanism for freedom of information – a right which more than 100 governments around the world have enshrined in law, and is openly advocated by UN bodies such as Unesco.
(4) Persons suffering from major narcissistic problems generally are assumed to be impervious to time-limited treatments.
(5) Or you can do it at the desk with your smartphone if you can remember the website address, don’t mind the data roaming charges, can remember your national insurance number and are impervious to the long queue developing behind you”.
(6) On the other hand, the performance of a material that is liquid-proof is absolute--it is impenetrable and can be accurately described as impervious.
(7) A mathematical solution has been obtained for the indentation creep and stress-relaxation behavior of articular cartilage where the tissue is modeled as a layer of linear KLM biphasic material of thickness h bonded to an impervious, rigid bony substrate.
(8) This is the essence of the problem, and sadly, Festinger's words ring true today: the conviction of humans is all too often impervious to the very evidence in front of them.
(9) The amplitude of quantal events is impervious to marked changes in presynaptic depolarization and is not affected by experimental procedures which promote accumulation of calcium ions in the terminals.
(10) Many such cases prove impervious to extensive articulation therapy, yet physical management may constitute "over-correction" with undesirable sequelae.
(11) Purified thymidylate synthetase can be assayed radiochemically using labelled deoxyuridine monophosphate as substrate, but cells are impervious to deoxyuridine monophosphate and so intracellular thymidylate synthetase activity cannot be assayed in this way.
(12) Heseltine's achievements have been matched by conspicuous failures, but his self belief is almost thrillingly impregnable, making him quite impervious to any such impression.
(13) It is rife with secrecy, top-down managerial manipulation, impervious to any outside scrutiny, contemptuous of any questioning, and has embraced extensive surveillance and discriminatory policing of religious and racial minorities.
(14) These actions of YM14673 were not due to a direct interference with brain TRH binding or a nature impervious to a TRH-degrading enzyme.
(15) The numerous tight junctions, impervious to the tracer, are always accompanied by a profusion of microfilaments.
(16) A newborn baby with a large unruptured omphalocele was successfully treated by covering the sac with a skin-like polymer membrane that is flexible, elastic, and impervious to bacteria and water.
(17) Bateman's unspeakable imaginings are the disease of an imperviously complacent world.
(18) In these measurements with an impervious, plane-ended indenter, the equilibrium deformation was systematically greater than values predicted from the instant response by the linear biphasic theory.
(19) "He appears impervious even to input from top Afghans."
(20) A tractor owned by a member of Greece’s far-right Golden Dawn is parked outside of a shelter and a dozen young men from Afghanistan rest against its wheels, grateful for the shade and impervious to the protest.