What's the difference between retentive and unretentive?

Retentive

Definition:

(a.) Having power to retain; as, a retentive memory.
(n.) That which retains or confines; a restraint.

Example Sentences:

(1) Estimates of potential for gastrointestinal side effects using the rat enteropooling assay and in vivo monkey effects indicate that diarrhea will be substantially reduced with retention of uterine stimulating potency.
(2) Retention of platelets from whole blood on glass beads was performed by the method of Bowie.
(3) The cis isomer was retained longer in liver, particularly in mitochondria, but had low retention in that portion of the endoplasmic reticulum isolated as the rough membrane fraction.
(4) Thus, brain NE levels after training were not predictive of retention performance in amygdala-implanted or -stimulated animals.
(5) The intent of this study was to investigate, by three-dimensional photoelastic analysis, the stress transmission that occurs with four commonly used retentive systems.
(6) We have investigated some of the factors which affect the retention times of these substances in reversed-phase HPLC on columns of 5-micron octadecylsilyl silica.
(7) Studies were performed to characterize the determinants of proximal tubule ammonia entry (and retention) in vivo.
(8) Long-distanced urethrocystopexy which permits to avoid an unwanted increase of outflow resistance with following retention of urine should be preferred.
(9) From a total of 200 PRBB's with different designs and retention systems, 152 were selected for this analysis.
(10) The absorption of zinc from meals based on 60 g of rye, barley, oatmeal, triticale or whole wheat was studied by use of extrinsic labelling with 65Zn and measurement of the whole-body retention of the radionuclide.
(11) Nitrogen retention was curvilinear in relation to metabolic live weight (kg0.75) in both series.
(12) Retention of iron from an RKB test meal was increased from 69.6 to 73% when about 90% of the extractable tannins were removed, but the difference was not statistically significant.
(13) --The influence of the digestibility of the energy in the ration on the energetic retention effect of BFC is small.
(14) In the absence of adequate data exclusively from studies of inhaled particles in people, the results of inhalation studies using laboratory animals are necessary to estimate particle retention in exposed people.
(15) The retention of critical care nurses is an important priority of nursing administration.
(16) Baseline evaluation revealed that 17 (32%) patients had high turnover (HTOP), and 36 (68%) normal turnover osteoporosis (NTOP) as assessed by measurement of whole body retention (WBR) of 99mTc-methylene diphosphonate.
(17) In darkness, raising the concentration of K in the fluid of perfusion gives an increase of the efflux of (86)Rb and increasing the extracellular concentration of Ca yields a retention.
(18) Alveolar deposition, however, assessed in terms of particle retention at 24 hours, was significantly (p less than 0.01) less in the smokers.
(19) This provides unequivocal evidence that partitioning is the dominant form of retention for small nonpolar solutes.
(20) A training device is used in conjunction with an exercise program to teach muscle control for retention of a mandibular denture.