Found inside – Page 29Properties of taurine transport in a human retinal pigment epithelial cell line J.W.Leibach , D.R.Cool , M.A.Del Monte ... The presence of an active transport system in the RPE has also been indicated by the observation that taurine accumulates ... Found inside – Page 1302Nevertheless , after NPA application , the phyllotactic pattern observed in wild - type meristems disappeared , and a ring ... in pinl meristems is likely to reflect the cumulative effect of compromised active auxin transport over a prolonged time . Found inside – Page 31During the south - west monsoon , the zone of active transport is found to be in the region between 50 m and 100 m from the shore . During the north - east monsoon , this zone is observed to have shifted seawards to the region between 100 m ... This collection can prove useful for mathematicians, cellular biologists, physical chemists, physiologists, electron microscopicists, geneticists, and engineers. Found inside – Page 1039These periments were done in order to demonstrate properties are commensurate with active trans whether ... not be discerned from these experiments . uptake that was observed for these latter cells , Active transport of mannitol was induced ... Found inside – Page 108A transport feature of OATi is its trans - stimulation by dicarboxylate , which was also observed in the brush - border membrane ... dinitrophenol , reduces the uptake of benzylpenicillin , which suggests the involvement of active transport ( 57 ) . Found inside – Page 2735These include the finding in the spontaneously hypertensive rat (SHR) that active transport of calcium is absent in the ... of observations of both hypertensive humans and animals indicate that cellular transport of calcium is defective in a variety ... Found insideOur results show that at this time the effect of gamma radiation on the uptake of IAA by the bark tissues can be observed . In control tissues the process of the active transport obscures the saturation point of the diffusion . Inhibiting the active ... Found inside – Page 204The apparent transport of Na ion against concentration gradient While the ion movements observed during incubation of ... 4 , at G ) . In order to test whether this process is to be considered as an active transport several types of experiments ... Found inside – Page 353These findings suggest that the reduction in transepithelial Na transport observed when the basal border of the epithelium is ... INTRODUCTION The level of active transport of sodium ions across epithelia can be modified over a wide range of ... Found inside – Page 295In the cross very rapidly across the barrier , and k is the absence of sodium , or the presence of ouabain , the transfer ... In vivo , however , we need not expect to viewed as a manifestation of an active transport observe accumulation , since the ... Found inside – Page 123In semi - quantitative terms ( Eq . 17 ) , Ep should vary with c / c in systems in which active transport is not a factor . ... When considering short - term variations in Ep observed during the course of the North Atlantic Bloom Experiment , Rau et al . Found inside – Page 637Fe is effective ; the inhibn . observed with 4.0 mg . Fe persisted for approx . 17 hr . The reduction in transport appears to result , in part at least , from a direct effect of Fe on the intestine . The active transport mechanism also responds adaptively ... Found inside – Page 199The Vmax of the system of D - glucose in rats of different ages active transport system of D - glucose was highest in 3 - day ... This observation suggests that the ac3 22.7 0.8 tivity and / or the number of the transporting 5 21.3 0.8 carriers of D ... Found inside – Page 146We did not observe any decrease in R with oua - bain ( Table 1 ) . Assuming that ouabain affects only active transport mechanisms for sodium and chloride , passive movements of these ions should remain unchanged . This was confirmed in ... Found inside – Page 159Finally, inhibition of the active transport, on which the potential depends, will reduce or abolish the potential. ... electrode in blood and one in the aqueous humour, of 6–15 mV, the aqueous humour being positive; and this observation has been ... Found inside – Page 70Motility in the presence of congenital pelvi - ureteral obstacles of urine flow The amount of urine that can be forced ... Instead of an active transport , passive flow is observed in many of these cases possibly without any disadvantage as far as ... Found inside – Page 324As far as the authors are aware , no active sodium transport between the cell and its environment without simultaneous countermovement of K + has hitherto been observed ( see Ussing 1960 for review ) . In the present experiments ( Table 4 ) ... Found inside – Page 152As stated before , the main requirement for the observation of counterflow in a bacterial sugar transport system is that the rate of the respective fluxes are not altered by the uncoupler . One might then ask why uncouplers abolish active ... Found inside – Page 23Since active transport of sugars into berry cells is enzyme medi . ated , it follows that the enzyme system would exhibit ... However , greater variability in soluble solids was observed within berries from exposed clusters than from shaded ... Found inside – Page 46In recent years, the two latter conditions are not found to be strictly necessary, since an active transport of mannose ... In 1958, Riklis and Quastel made the observation that the movement of glucose is dependent on the presence of Na in the ... Found inside – Page 30Although our observations are rather limited in duration , they make evident that erosion and sediment transport is taking ... Erosion and very active transport of coarse material downcanyon is most pronounced in Hydrographer Canyon where ... Found inside – Page 1043It had been demonstrated previously in isolated rabbit proximal tubules that glucose reaching the cells from the ... and also amino acids with sodium at the luminal cell membrane provides an explanation for the observed active transport, ... Found inside – Page 337TABLE 7 - 5 Ionic Concentrations in the Erythrocyte and the Surrounding Blood Plasma Concentrations in Milliequivalents per Liter ciBELES The ... This image is consistent with the high fluxes observed for the gramicidin channel , 10 ' cesium ions per second , a thousand times higher than valinomycin . ... First , we consider some of the basic observations that point to the existence of active transport . Found inside – Page 109The drug itself and its methoxy Evidence for active transport of methyldopa . derivative were observed in similar concentrations Since our studies and those of others ( Dollery and to those seen after l - methyldopa therapy but no Harrington ... Found inside – Page 54ELECTROGENIC NATURE OF ACTIVE ION TRANSPORT In the early publications of ... Studies of the potential step observed at the serosal boundary by means of a ... Found inside – Page 148Relationship of Changes in Permeability to Changes in Active Transport When active ion transport is inhibited by agents ... It is possible that the initial anion selective effect observed for antrum may have been modified or very short lived in the ... The physical background; Tables of some physical and chemical properties of water; The structure of water and its biological implications; Kinetic theory and transport in ice and water; Recent research into the properties of water in thin ... Found inside – Page 742( 1985 ) who found that oral consumption of stevioside ( 75 % pure ) in amounts as high as 550 mg / kg BW / day for 2 years , showed no toxic or carcinogenic effects in ... The transport process of PAH across the basolateral membrane is termed tertiary active transport in which the final step is transport of PAH ( or other ... This is consistent with the observations using rat renal cortical slices ( Toskulkao et al . Found inside – Page 455Next , a small increase in respiration and inhibition of phosphate - induced swelling suggest limited uncoupling of ... Observations of active and passive cation transport in toad bladder ( 71 ) and erythocyte membranes ( 68 , 69 ) show that , in ... Found inside – Page 4298Cysteine cleavage of caldesmon performed under non - denatui conditions resulted in an active fragment with a molecular weight al kd . ... Order Number DA8827 The red yeast Rhodotorula glutinis utilizes a stereospecific , cari mediated , transport system to actively transport D - glucose acros ... These vesicles exhibited the saturable kinetic D - glucose uptake observed in intact Rhodotorula cells . Found inside – Page 2210... the affinity for exit . For conversion of this simple equilibrating system to an active transport system , there must ... Since the maximum concentration ratio for galactosides observed in this study was 100 - to 200 - fold ( Fig . 2 ) , the ratio of K ... Found inside – Page 1166However , it is not clear whether these demonstrated , but synthesis of CoA within the differences could account for the ... the matrix be responsible for CoA synthesis observed in by an active transport system against a conthe present study . Found inside – Page 361Discussion The facts presented in this paper show that the process of active absorption of sugars ( glucose , galactose , and ... The stimulation of active glucose transport in the intestine found with potassium ions may also be observed with ... Found inside – Page 516This effect , however , was not observed in the wildtype strain . The succinate ... In order to determine the presence of an active transport system , the effect of metabolic inhibitors was measured as described in Table 2. The activity of this ... Found inside – Page 188In addition , sodium was transferred in a similar manner in either direction with no indication of an active transport process , confirming previous observations . Yet the original observations of Flexner and Gelhorn ( 1942 ) and Flexner et al . The approach to treating plasma transport based on the paradigm of self-organized criticality (SOC) is largely due to the success of this paradigm as an explanation for some of the discrepancies between theoretical predictions of turbulent ... Found inside – Page 207The ionic dependence of NMF binding to the membranes was very similar to that observed in this study with human TH protein , A halfmaximal ... Greger suggested a halfmaximal stimulation of active transport at a Na + concentration of 3 . Found inside – Page 23This comparison indicates that photosynthetic reactions in the stalk cell and bladder cytoplasm may not be sufficiently active to support the chloride transport observed . For these reasons it is very unlikely that the driving force for the light ... Found inside – Page 88Thus , removal of Nat from the medium would inhibit active transport through depletion of the intracellular pools . Harrison and Harrison ( 1963 ) also noticed that Nat was required for the maintenance of concentration differences between ... Found inside – Page 4301 , 25 - 27 The high value of the unidirectional fluxes is a disadvantage in studying the effect of drugs on the active transport . With MDCK cells of a higher resistance ( 100 – 120 ) we observed unidirectional fluxes of 6 . 79 + 0 . 92 ? umole h - 1 ... Found inside – Page 90Few detailed investigations of active transport have been carried out with intact plants . ... RUSSELL and MARTIN ( 1953 ) have emphasised the sensitivity of the method is such that observations can be made over periods so short that weight ... Found inside – Page 86( 13 ) is pelleted phosphatase activity dependent on viis observed on SDS - polyacrylamide gel with intestinal brush ... Removal of Ca2 + at the cytosolic have been estimated using the cation tinal transport of calcium , the precise ... Transcellular active transport as the Golgi apparatus ( 6 ) or mitoa mean pK value of 5 . 6 . 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