(n.) Full of pores; having interstices in the skin or in the substance of the body; having spiracles or passages for fluids; permeable by liquids; as, a porous skin; porous wood.
Example Sentences:
(1) Recently reported unfavorable clinical results (i.e., a high incidence of pain) have led to the discontinuation of one trial of porous polyethylene.
(2) A porous structure, possibly involving a capsid and RNA complex, is envisioned.
(3) The commonly used line-to-line reaming technique was compared to an underreaming technique using both four-fifths and one-third porous-coated anatomic medullary locking (AML) implants.
(4) A novel type of ion exchanger was prepared by multipoint covalent binding of polystyrene chains onto the surface of porous silica followed by polymer-analogous modification of the bonded layer.
(5) On the buccal and lingual aspects of the implants, both the absolute lengths and CLF were significantly smaller for the porous-coated design.
(6) The usefulness of porous tarflen materials (tarflen--Polish name of teflon produced by Zakłady Azotowe in Tarnów, Poland) for this application was evaluated by comparing their properties with those of American porous teflon membranes used in membrane oxygenators.
(7) Epidermal growth factor added to cultures on solid or porous supports caused proliferation of epithelial-type cells to give a confluent monolayer but did not increase the expression of differentiated function.
(8) Porous polyethylene was thus better incorporated into the soft tissues than silicone rubber as long as the overlying soft tissues were not stressed by an oversized implant or inadequate soft tissue coverage.
(9) In earlier studies, we have shown that porous (60 micron internodal distance) PTFE grafts develop a complete endothelial layer 2 weeks after being implanted in baboons.
(10) The N supplements had no significant effects on rumen pH, concentrations of volatile fatty acids, their molar proportions or the disappearance of DM or N from porous synthetic-fibre bags.
(11) The authors conclude that a very open luminal surface structure, and a high wall porosity, are significant factors of graft patency in small diameter vascular prostheses made of a porous material.
(12) Monday’s budget request, an increase of 2.2% on last year, demonstrates a shift in Japan’s security emphasis from its northern maritime border with Russia to its long and porous southern reaches.
(13) This theoretical analysis is in excellent agreement with experimental data obtained with glucose oxidase immobilized on a porous collagen membrane.
(14) The porous implant volume sampled within 2.5 mm of underlying cortex contained 33.0% HA matrix and 35.7% bone.
(15) Interactions among the important constituents of the fibrocartilage matrix cause meniscal tissue to behave as a fiber-reinforced, porous, permeable composite material similar to articular cartilage, in which frictional drag caused by fluid flow governs its response to dynamic loading.
(16) These cases show that rigid fixation with good bony ingrowth does not guarantee the clinical success of a porous-coated uncemented femoral stem.
(17) The linear solvent strength model of Snyder was applied to describe fast protein separations on 2.1-micron non-porous, silica-based strong anion exchangers.
(18) The regional-development of heterotopic bone around the hip and the influence of postoperative prophylaxis with antiinflammatory drugs were studied in 66 patients treated with 74 noncemented, porous-coated total hip arthroplasties (THA) using the McFarland approach.
(19) A new process of plasma-spraying hydroxyapatite--an entirely biocompatible, bioceramic material--onto porous, titanium alloy components promotes bone ingrowth into the components resulting in implant fixation, which is superior to current methods of cemented or cementless fixation.
(20) The mechanical strength of the porous coating on the prosthetic surface should be improved and the prosthesis should be tested in limited clinical studies before cementless fixation can be recommended.
Zeolite
Definition:
(n.) A term now used to designate any one of a family of minerals, hydrous silicates of alumina, with lime, soda, potash, or rarely baryta. Here are included natrolite, stilbite, analcime, chabazite, thomsonite, heulandite, and others. These species occur of secondary origin in the cavities of amygdaloid, basalt, and lava, also, less frequently, in granite and gneiss. So called because many of these species intumesce before the blowpipe.
Example Sentences:
(1) Five experiments were conducted using 36 dietary treatments to compare chloride salts and HCl as chemical sources of Cl for the adjustment of dietary Cl when using sodium aluminosilicate (SAS), to compare SAS to natural zeolites (clinoptilolite and mordenite), and to determine the appropriate level of dietary SAS for optimum egg specific gravity.
(2) The effectiveness of zeolite was lower in media containing nitrogen compounds and in those cases when its doses were low.
(3) We present here a production of anti-bacterial zeolite balloon catheter and investigated its potential for controlling urinary tract infection.
(4) Increased secretion of type 2 alveolocytes as well as participation of type 1 alveolocytes and macrophages in surfactant secretion were established in the course of intratracheal administration of indigestible mineral particles--natural zeolites to white male rats.
(5) Adsorption of hydrogen sulfide, methanethiol, methyl sulfide, trimethylamine, and ammonia on thirteen kinds of adsorbents (5 kinds of silicate, 4 kinds of activated carbon, and 4 kinds of zeolite) was measured by gravimetry, at 30 degrees C and 50 Torr, using an adsorption apparatus with a spring balance in order to find the most suitable adsorbent for the removal of these gases by dry process.
(6) This effect of sodium zeolite A appeared to be beneficial to bone status in the groups fed adequate vitamin D, since these treatment groups had higher, although not significant, dry tibia weights with and without fat.
(7) Observation was made of the influence of natural zeolite (clinoptilolite) supplement in food on 134Cs excretion and distribution after oral internal contamination of laboratory brown rats.
(8) The biologic aggressiveness of the zeolites is discussed in relation to their strong active surface, their ionometabolic properties and their capacity to generate hydrogen at moistering.
(9) The zeolite (clinoptilolite) sorption of arsenic, cadmium, and lead ions from rumen fluid and abomasum juice was investigated in laboratory conditions.
(10) Recent data point to erionite, a zeolite fibre, as the most plausible etiological agent.
(11) The possible mechanisms of zeolite action, together with the effect of the disruptive procedure on the chemical composition of cell wall fragments, were investigated also.
(12) In this village, environmental exposure to erionite, a fibrous zeolite, occurs, and there is an extremely high risk of mesothelioma among the villagers.
(13) It was concluded that zeolite A will significantly increase egg specific gravity and we hypothesize that the mechanism responsible for the significant improvement is related to the high ion-exchange capability of zeolite A.
(14) New phosphor crystals, on the basis of zeolit, activated by tin (Sn), appeared to be a very suitable permanent fluorescent test-object for setting up microscopes, intructing new users and for calibrating microfluorimeters.
(15) The use of a synthetic zeolite (type 4A, Union Carbide Corp., Linde Div., New York, N.Y.) in a procedure for the preparation of pure cell wall fractions proved successful for many gram-positive, gram-negative, and acid-fast bacteria, as well as for some fungi.
(16) Silicon in trace amounts enhances bone formation, and the silicon-containing compound zeolite A (ZA) increases eggshell thickness in hens.
(17) The washed microsomal fraction was exposed to a variety of reagents; a sodium iodide-cysteine treatment increased both adenosine-triphosphatase and exchange activities, as also did a synthetic zeolite.
(18) The adsorption of aflatoxin (AF) B1, contained in aqueous medium or in synthetic medium left after the cultivation of Aspergillus parasiticus NRRL 2999, was studied in two samples of bentonite, two samples of natural zeolite, and three kinds of adsorption coal added to water, to saline, to the blood serum of pigs, to the stomach fluid of pigs or rumen fluid of cows at concentrations of 5 to 50 mg per litre.
(19) Since fibrous zeolites are frequently employed in industry, industrial hygiene and occupational medical consequences need to be drawn.
(20) Sodium zeolite-A increased serum alkaline phosphatase (P less than .04), carcass length (P less than .06), and liver (P less than .02) and bone (P less than .01) Zn content but decreased (P less than .04) serum Ca and serum inorganic P concentrations.