Journal articles on the topic 'Regrowth'
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1
Jenčič, I., and I. M. Robertson. "Low-energy electron beam induced regrowth of isolated amorphous zones in Si and Ge." Journal of Materials Research 11, no. 9 (September 1996): 2152–57. http://dx.doi.org/10.1557/jmr.1996.0274.
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Spatially isolated amorphous regions in Si and Ge have been regrown at room temperature by using an electron beam with an energy less than that required to cause displacement damage in crystalline material. The rate at which the zones regrow is a function of the energy of the electron beam. As the electron energy is increased from 25 keV (lowest energy employed), the regrowth rate decreases and reaches a minimum below the threshold displacement voltage. With further increases in the electron energy, the rate again increases. It is suggested that at the lower electron energies this room temperature regrowth process is stimulated by electronic excitation rather than by displacive-type processes.
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Hill, MJ, and CJ Pearson. "Primary growth and regrowth responses of temperate grasses to different temperatures and cutting frequencies." Australian Journal of Agricultural Research 36, no. 1 (1985): 25. http://dx.doi.org/10.1071/ar9850025.
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Primary growth and regrowths of Italian ryegrass (Lolium multiforum), prairie grass (Bromus catharticus) and tall fescue (Festuca arundinacea), grown in glasshouses at temperatures ranging from 15/10 to 30/25�C, were measured when defoliated every 4 or 8 weeks. Prairie grass, tall fescue, Ucivex Italian ryegrass, and Tama Italian ryegrass each had different patterns of regrowth. Growth was fastest at 21/16 and 24/19�C in primary growth and at 15/10�C in regrowth, except for fescue which had fastest regrowth at 24/19�C. Frequent defoliation (every 4 weeks) halved the total dry matter yield harvested throughout the experiment. The mean number of tillers and leaves produced was halved by frequent defoliation and leaf area was reduced to one-quarter of that for plants defoliated every 8 weeks. Reproductive development was earlier in plants grown at lower temperatures and did not occur in those grown at 24/19 and 30/25�C. Primary growth of Italian ryegrass and prairie grass was faster than that of tall fescue. Yield and the number of tillers increased at successive regrowths under 8-week defoliation, but only Tama Italian ryegrass maintained its productivity under frequent defoliation owing to its ability to maintain a high tiller population and high individual leaf areas. Productivity of prairie grass was limited by low tiller number despite its high yield per tiller, and productivity of tall fescue was restricted by both low tiller number and low yield per tiller. The extent to which current growth was influenced by prior growth and, by implication, previous defoliation management differed between the grasses. For example, productivity in any regrowth of Tama was essentially independent of growth during the primary growth or previous regrowth periods, whereas regrowths of prairie grass were highly dependent on growth during previous regrowth periods.
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Rankin, J., J. C. McCallum, and L. A. Boatner. "The effect of annealing environments on the epitaxial recrystallization of ion-beam-amorphized SrTiO3." Journal of Materials Research 7, no. 3 (March 1992): 717–24. http://dx.doi.org/10.1557/jmr.1992.0717.
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Time-resolved reflectivity and Rutherford backscattering spectroscopy were used to investigate the effects of regrowth environments on the thermally induced solid phase epitaxial (SPE) regrowth of amorphous near-surface layers produced by ion implantation of single-crystal SrTiO3. Water vapor in the regrowth atmosphere was found to alter both the apparent rate and activation energy of the SPE regrowth. For relatively dry atmospheres, a single constant regrowth rate is observed at any given temperature, and the activation energy is 1.2 ± 0.1 eV. When the concentration of H2O vapor in the atmosphere is increased, however, the regrowth activation energy effectively decreases to ∼0.95 eV. When regrown in atmospheres containing H2O vapor, the SrTiO3 amorphous layer exhibits two distinct stages of SPE regrowth as compared to the single rate found for dry anneals. This two-stage process apparently results from the diffusion of H/OH from the regrowth atmosphere at the surface of the crystal through the amorphous layer to the regrowing crystalline/amorphous interface.
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Mayne, C. S. "The effect of formic acid, sulphuric acid and a bacterial inoculant on silage fermentation and the food intake and milk production of lactating dairy cows." Animal Science 56, no. 1 (February 1993): 29–42. http://dx.doi.org/10.1017/s0003356100006139.
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AbstractHerbage from first and second regrowths of perennial ryegrass based swards was directly ensiled following treatment with formic acid (850 g/kg) at 2·53 and 2·58 l/t, sulphuric acid (45% w/w) at 3·09 and 3·04 l/t, an inoculant of Lactobacillus plantarum (Kickstart, United Distillers Ltd) at 2/24 and 2/14 l/t, or no additive (control). First regrowth herbage had mean dry matter (DM) and water-soluble carbohydrate concentrations of 168 and 27·0 g/kg fresh weight with comparable values for second regrowth herbage of 164 and 16·9 g/kg respectively. All silages preserved well, although both the rate and extent of fermentation, as indicated by pH and lactic acid levels, were greater in control and inoculant-treated silages. Additive treatment had little effect on nutrient recovery following ensilage with the exception of a slightly greater recovery of both DM and energy with inoculant treated, second regrowth material. The silages were evaluated in two experiments, with 9 and 4 week periods for first and second regrowths respectively, using 48 British Friesian dairy cows. Animals were housed in individual stalls and, in addition to the treatment silages, received 5 kg/day fresh weight of a supplement containing 197 g crude protein per kg DM. Treatment of first regrowth material with formic acid significantly increased silage DM intake (P < 0·02) with a smaller, though positive effect being obtained with inoculant treatment. Treatment with either formic acid or inoculant had no significant effect on DM intake with second regrowth material. In contrast sulphuric acid tended to depress intake of first regrowth material whereas a marginal increase in intake was obtained with second regrowth material. Inoculant treatment had no significant effect on milk yield with either first or second regrowth material, although there was a tendency for small, though consistent, increases in milk fat and protein concentrations. Formic acid treatment resulted in marginal increases in fat plus protein yield whereas effects of sulphuric acid were less consistent with animal performance being decreased with first regrowth material and little effect observed with second regrowth material.
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Kotzea, Simon, Wiebke Witte, Birte-Julia Godejohann, Mathias Marx, Michael Heuken, Holger Kalisch, Rolf Aidam, and Andrei Vescan. "Comparison of MOCVD and MBE Regrowth for CAVET Fabrication." Electronics 8, no. 4 (March 28, 2019): 377. http://dx.doi.org/10.3390/electronics8040377.
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In this paper, we demonstrate the fabrication of current aperture vertical electron transistors (CAVET) realized with two different epitaxial growth methods. Templates with a p-GaN current blocking layer (CBL) were deposited by metal organic chemical vapor deposition (MOCVD). Channel and barrier layers were then regrown by either molecular beam epitaxy (MBE) or MOCVD. Scanning electron microscope (SEM) images and atomic force microscope (AFM) height profiles are used to identify the different regrowth mechanisms. We show that an AlN interlayer below the channel layer was able to reduce Mg diffusion during the high temperature MOCVD regrowth process. For the low-temperature MBE regrowth, Mg diffusion was successfully suppressed. CAVET were realized on the various samples. The devices suffer from high leakage currents, thus further regrowth optimization is needed.
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Schuenemann, Riccarda, and Gerhard Oechtering. "Inside the Brachycephalic Nose: Conchal Regrowth and Mucosal Contact Points After Laser-Assisted Turbinectomy." Journal of the American Animal Hospital Association 50, no. 4 (July 1, 2014): 237–46. http://dx.doi.org/10.5326/jaaha-ms-6086.
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This prospective observational study analyzed conchal regrowth after laser-assisted turbinectomy (LATE) in brachycephalic dogs and the mucosal contact of regrown conchae. Eighty brachycephalic dogs (41 pugs, 39 French bulldogs [FBs]) that underwent LATE because of obstructing conchae were evaluated by endoscopy 7 days and 6 mo after surgery. At 6 mo, 96% of FBs’ and 65% of pugs’ nasal cavities showed regrowth of turbinates. FBs showed higher growth grades than pugs. Revision surgery because of reobstructing regrowth was required in the nasal cavities of 17% of FBs and 3% of pugs. The mean number of contact points reduced from 3.0 in FB and 1.7 in pugs before surgery to 1.2 in FB and 0.2 in pugs after conchal regrowth. Recollapse of nares after surgery significantly influenced the frequency of reoccurrence of contact points. LATE was proven to be an effective treatment of intranasal obstruction caused by mucosal contact between conchae. Conchal regrowth commonly occurs after surgical removal, but the new conchae cause less obstruction due to a significant reduction in number of contact points. Revision surgery because of reobstruction is rarely necessary. The important physiologic functions of conchae make nonobstructing regrowth desirable.
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Oji, Tomito, Masaki Yazawa, and Kazuo Kishi. "Basic Fibroblast Growth Factor for Treatment of Onychomadesis with Delayed Regrowth of the Nail." Case Reports in Dermatological Medicine 2013 (2013): 1–3. http://dx.doi.org/10.1155/2013/214810.
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Onychomadesis usually arises from an inflammation of the paronychium or as a result of blisters and hemorrhaging under a nail that has been struck or compressed. No documented interactions between basic fibroblast growth factor (bFGF) and onychomadesis have hitherto been reported. This case report describes a 25-year-old woman with onychomadesis following infection of the ingrown nail of her left thumb. After ten months of observation with no treatment showed no regrowth of her left thumbnail, the external use of bFGF and antibiotic ointment was started. One month later, nail regrowth was observed up to the halfway point of the nail bed, and after treatment for three months, the regrown nail reached the top of the nail bed. Both thumbnails now looked identical. This case suggests that external use of bFGF can promote nail regrowth in cases of onychomadesis with delayed regrowth of the nail.
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Bicksler, Abram Jared, and John B. Masiunas. "Sorghum Accessions for Use as Cover Crops and Biofuel Feedstocks." Journal of Agricultural Studies 3, no. 2 (August 29, 2015): 258. http://dx.doi.org/10.5296/jas.v3i2.8114.
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Phenotypes of sorghum species (Sorghum sp.) have characteristics making them valuable summer annual cover crops and/or biofuel feedstocks for temperate climates. In field studies conducted at Urbana, IL, USA, fourteen USDA sorghum landrace accessions and three commercial sorghum accessions were evaluated for their growth habits and regrowth potential. In Canonical Discriminant Analysis (CDA) analysis, the first two canonical variates were significant and accounted for 86% of the among-accession variability. Unmown tiller number, regrowth tiller number, and regrowth biomass best discriminated between accessions in CDA and scattergrams. The accessions clustered into three subgroups. Three multi-stemmed accessions (two commercial varieties and one USDA accession) with an ability to regrow clustered away from the bulk of the USDA sorghums. Multi-stemmed accessions are useful for breeding improved summer annual cover crops that are tall, produce copious amounts of biomass, and rapidly regrow after defoliation; although propensity to lodging and poor germination of accessions will need attention. Additionally, landrace sorghum accessions in the USDA germplasm collection are useful for breeding cover crop and biofuel feedstocks, due to their great height and biomass production, although it will be necessary to select for improved regrowth potential. Crosses between USDA landraces and the commercially available multi-stemmed accessions could lead to a sorghum cover crop and biofuel plant with great biomass and height and ability to regrow following defoliation.
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Rodríguez-López, María Isabel, Vicente M. Gómez-López, Viktorija Lukseviciute, and Zivile Luksiene. "Modeling the Inactivation and Possible Regrowth of Salmonella enterica Treated with Chlorophyllin-Chitosan and Visible Light." Food Technology and Biotechnology 58, no. 1 (April 22, 2020): 64–70. http://dx.doi.org/10.17113/ftb.58.01.20.6374.
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The study focuses on predictive modelling of inactivation of Salmonella enterica after treatment with chlorophyllin-chitosan complex and visible light. Salmonella cells were incubated with chlorophyllin-chitosan complex (0.001 % chlorophyllin and 0.1 % chitosan) for different times (5-60 min) and then illuminated with visible light (λ=405 nm, He=38 J/cm2). Inactivation curves and post-treatment regrowth curves were built based on microbiological viability tests and data were fitted to ten inactivation and two regrowth models. The photoactivated complex reduced Salmonella population, which were unable to regrow. Weibull and Baranyi models were the best to describe the inactivation and regrowth kinetics respectively. In conclusion, data from the kinetic analysis and predictive modelling confirmed that photoactivated chlorophyllin-chitosan complex is a promising non-thermal approach for inactivation of Gram-negative pathogens, since no bacterial regrowth after treatment has been predicted.
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Fulkerson, W. J., and K. Slack. "Effect of defoliation height and redefoliation interval on regrowth and survival of perennial ryegrass (Lolium perenne) in subtropical dairy pastures." Australian Journal of Experimental Agriculture 43, no. 2 (2003): 121. http://dx.doi.org/10.1071/ea01174.
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A cut plot study was undertaken on the subtropical north coast of New South Wales, Australia, to determine the effect of defoliation height and redefoliation interval on dry matter yield and persistence of perennial ryegrass (Lolium perenne L.) pastures. The pasture was established on 7 April 1998 and plots were irrigated to replace evapotranspiration loss. The study was a completely randomised block design with plots of 2 by 1 m and treatments replicated 3 times. In winter (commencing 13 July) plots were defoliated to 20, 50 or 120 mm stubble height and either not redefoliated or redefoliated at 3, 6 or 3 and 6 days after initial defoliation. In spring (commencing 28 October) plots were redefoliated as for winter but only to 50 mm stubble height. After imposition of the redefoliation treatments, the plots were allowed to regrow until the non-redefoliated treatments had regrown 3 new leaves per tiller (subsequently referred to as a regrowth cycle) and then again defoliated (regrowth cycle 1). Plots cut in winter were then halved with one half (A plots) continuing to be subject to the redefoliation treatment for 4 more regrowth cycles until regrowth cycle 1 in spring was completed on 24 November, while the other half (B plots) were a carryover comparison of redefoliation treatment in regrowth cycle 1. Both A and B plots continued to be subjected to the same defoliation height treatments as imposed in regrowth cycle 1. From 24 November to 30 March 1999, plots were defoliated at 50 mm height each time 3 new leaves per tiller had regrown.Plots defoliated to 20 or 50 mm height during regrowth cycle 1 in winter yielded 21% more dry matter than plots cut to 120 mm height while redefoliation at 6 or 3 and at 6 days produced 14% less dry matter than plots not redefoliated or redefoliated at 3 days. Continued redefoliation at 6 days (comparison within A plots) reduced dry matter yield by 63% compared with no redefoliation or redefoliation at 3 days, but only in plots defoliated to 20 or 50 mm height.Plant density in the autumn (March 1999) of the year after establishment was positively related to defoliation height over regrowth cycles 1–5 of the previous year (35, 55 or 77 plants/m2 for plots defoliated at 20, 50 or 120�mm, respectively). Plant density of plots not redefoliated or redefoliated at 3 days over regrowth cycles 1–5 was 63% higher (70 plants/m2) than for the other treatment combination (43 plants/m2) at P = 0.07 level of significance.Plants cut to 20 or 50 mm stubble height at the commencement of regrowth cycle 1 in winter had a stubble water-soluble carbohydrate content of 5.2%, decreasing to 2.3% at day 6 post-defoliation. The water-soluble carbohydrate content of plants cut to 120 mm were initially higher at 8% and fell to only 6.4% by day 6.The redefoliation treatments imposed in this study were designed to simulate the regrazing of regrowth shoots in an extended grazing bout at various defoliation heights. The results confirm the negative effects of redefoliation, at 6 days in the winter to spring period, on both dry matter yield and plant survival over the subsequent summer in the subtropics. In contrast to winter, redefoliation in late spring had no effect on dry matter yield or plant density. The results also indicate a compromise between the benefits of more lax grazing for persistence and harder grazing for pasture utilisation.
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Shapiro, Jerry, and Vera H. Price. "HAIR REGROWTH." Dermatologic Clinics 16, no. 2 (April 1998): 341–56. http://dx.doi.org/10.1016/s0733-8635(05)70017-6.
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Robinson, Mendell. "Otosclerosis Regrowth." Laryngoscope 103, no. 12 (December 1993): 1383???1384. http://dx.doi.org/10.1288/00005537-199312000-00012.
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Estey, Elihu H. "Regrowth resistance." Leukemia Research 18, no. 3 (March 1994): 161. http://dx.doi.org/10.1016/0145-2126(94)90110-4.
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Gill, Sanjitpal S., Maria A. Turner, Todd C. Battaglia, Henry T. Leis, Gary Balian, and Mark D. Miller. "Semitendinosus Regrowth." American Journal of Sports Medicine 32, no. 5 (July 2004): 1173–81. http://dx.doi.org/10.1177/0363546503262159.
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Muldoon, DK. "Summer forages under irrigation. 1. Growth and development." Australian Journal of Experimental Agriculture 25, no. 2 (1985): 392. http://dx.doi.org/10.1071/ea9850392.
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Summer forages, including Sorghum bicolor hybrids, S, sudanense, S. bicolor x S. sudanense hybrids, perennial sorghum, maize and Pennisetum and Echinochloa millets were grown on an alkaline clay soil at Trangie, New South Wales. They were fertilized and flood irrigated to allow the expression of potential growth characteristics. Fractional dry matter accumulation was measured during primary growth and subsequent regrowths. The accumulation pattern in primary growth was described by quadratic regressions of logarithmically transformed data. The highest dry matter yield of 31-33 t/ha was obtained in a single cut from late flowering sweet sorghum hybrids. Under a multiple cutting regime, however, these were inferior to sudangrass and sorghumxsudangrass hybrids, which produced up to 14 and 16 t/ha, respectively. The latter group maintained tiller numbers in regrowth in contrast to the poor tillering and slow regrowth of sweet sorghum hybrids. Regrowth of maize was negligible following tiller decapitation. Piper Sudangrass and Indian barnyard millet were the only species to yield as much under multiple cutting as from a single cut. The latter was exceptional among the millets in that most millets tillered poorly after the second cut. The millets produced less than half the cumulative regrowth yield of sorghum hybrids. Removal of the apical meristem appeared to jeopardize their regrowth. Consequently, if maximum dry matter production is the sole aim of forage production, millets do not compete with sorghum hybrids in a warm temperate climate.
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Wu, X. D., L. Luo, R. E. Muenchausen, and S. R. Foltyn. "Thermal regrowth of ion-damaged YBa2Cu3O7−δ superconducting thin films." Journal of Materials Research 7, no. 3 (March 1992): 531–34. http://dx.doi.org/10.1557/jmr.1992.0531.
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Regrowth of ion-damaged YBa2Cu3O7−δ thin films on LaAlO3 was studied using the ion beam channeling technique. The damaged films can be regrown at a temperature as low as 650 °C, and are stable up to 1000 °C. The regrowth process was found to be thermally activated with a single activation energy of 0.46 eV, contrary to two energies found in a previous study on the films on MgO [J. A. Martinez et al., Appl. Phys. Lett. 57, 189 (1990)].
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Sakki, Anniina J., Aino Mutka, Johanna Nokso-Koivisto, and Laura K. Mäkinen. "Do tonsils regrow after partial tonsillectomy? – Histology of regrown tonsils and predisposing factors for tonsillar regrowth." International Journal of Pediatric Otorhinolaryngology 157 (June 2022): 111132. http://dx.doi.org/10.1016/j.ijporl.2022.111132.
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Ribeiro Filho, H. M. N., R. Delagarde, and J. L. Peyraud. "Inclusion of white clover in strip-grazed perennial ryegrass swards: herbage intake and milk yield of dairy cows at different ages of sward regrowth." Animal Science 77, no. 3 (December 2003): 499–510. http://dx.doi.org/10.1017/s1357729800054448.
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AbstractThe introduction of legumes in grass-based swards provides some economic and agronomic advantages, often allowing an increase in the performance of grazing ruminants. The aim of this study was to obtain a better quantification of the nutritional benefits to dairy cows after introducing white clover into swards of perennial ryegrass (PRG), using two ages of regrowth. Four treatments were studied in a 2 ✕ 2 factorial design with two sward types and two ages of regrowth. The swards were either a pure perennial ryegrass sward with nitrogen (N) fertilization, or a perennial ryegrass/white clover mixture (GC) with no N fertilization. The regrowth ages were 19 and 35 days (treatments: PRG19, PRG35, GC19 and GC35). The proportion of clover in the GC swards was on average 420 g/kg dry matter (DM). Twelve late-lactation Holstein cows, fistulated at the rumen and duodenum, were used according to a 4 ✕ 4 Latin-square design with four 11-day periods. The pasture was strip-grazed with 12 kg DM per cow of herbage above 5 cm offered daily in all the treatments.The effects of sward type and regrowth age were often additive, in particular for herbage intake and milk yield. Herbage organic matter (OM) intake, duodenal non-ammonia N (NAN) flow and milk yields were higher on the GC swards and lower on the older regrowths. Finally, the performance of the cows was similar on the PRG19 and GC35 treatments. The OM digestibility of the selected herbage as well as the duodenal nitrogen flux per kg digestible OM intake was not affected by the sward type. Ruminal fermentations were more intense with mixed swards and the youngest regrowths. The daily grazing time and the daily pattern of grazing activities were modified by the type of sward and by regrowth age. The average OM intake rate was higher on the GC swards than on the PRG swards. In this study, the nutritional advantage of introducing white clover into swards of perennial ryegrass was related to an increase in herbage intake and not to any improvement in the nutritive value of the sward.
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Harrison, T., and J. T. Romo. "Regrowth of smooth bromegrass (Bromus inermis Leyss.) following defoliation." Canadian Journal of Plant Science 74, no. 3 (July 1, 1994): 531–37. http://dx.doi.org/10.4141/cjps94-095.
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Regrowth and production of tillers in smooth bromegrass (Bromus inermis Leyss.) following defoliation to a 5-cm stubble height were monitored throughout the summer and in early spring the following year in central Saskatchewan. After defoliation, while smooth bromegrass was vegetative, forage began accumulating in 45–75 growingdegree-days (GDD) when moisture was favorable. Regrowth ranged from 34 to 84 g m−2. Plants also produced ≤ 51 g m−2 of regrowth when defoliated at or before culm elongation in a year with above-average precipitation. In two dry years, regrowth was minimal and plants did not regrow after defoliation in the later vegetative growth stages; however, new leaves were produced within 110–140 GDD. Following defoliation at early vegetative growth stages, 1030–1180 GDD were needed to reach maximum regrowth. Total annual production was either unaffected or reduced by defoliation. Total annual production ranged from 35 to 139 g m−2, with yields lowest when defoliated in early May or early June and highest when herbage was removed in mid-May or near flowering and seed production. When plants were defoliated during vegetative growth most tillers were produced the following spring, whereas when plants were defoliated during reproductive phases the majority of tillers emerged in the fall. The year after defoliation, the density of tillers (871–951 m−2) was not significantly different among treatments. Regrowth following defoliation cannot be related to a particular growth stage, but rather it depends on growing conditions. If smooth bromegrass is defoliated once and rested until the next year, it should be recovered by early spring and its productivity should be unaffected. Key words: Etiolated growth, forage production, grazing management, regrowth, rest requirement, tillering
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Sands, T., E. D. Marshall, and L. C. Wang. "Solid-phase regrowth of compound semiconductors by reaction-driven decomposition of intermediate phases." Journal of Materials Research 3, no. 5 (October 1988): 914–21. http://dx.doi.org/10.1557/jmr.1988.0914.
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The solid-phase epitaxial regrowth of a III–V compound semiconductor by a two-stage reaction between a two-layer metallization and a compound semiconductor substrate is described. The regrowth process begins with a low-temperature reaction between a metal M (e.g. Ni, Pd, or Pt) and a compound semiconductor substrate, AB, to produce an intermediate M, AB or MB, phase. A subsequent reaction at a higher temperature between an overlayer of Si, Ge, Al, or In and the intermediate phase results in the decomposition of the intermediate phase and the epitaxial regrowth of a layer of the compound semiconductor. This regrowth mechanism is verified experimentally for the specific case of the Si/Ni/GaAs system. Rutherford backscattering spectrometry and transmission electron microscopy data show that the ternary phase Nix GaAs, formed during the initial stage of the reaction, decomposes toNiSi and GaAs by reaction with the Si overlayer. The incorporation of the overlayer element into the regrown semiconductor layer is proposed as a mechanism to explain the formation of Ohmic contacts in Si/Pd/n-GaAs, In/Pd/n-GaAs, In/Pt/n-GaAs, and similar two-layer metallization systems on n-GaAs.
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Demange, Marco Kawamura, Tom Minas, Arvind von Keudell, Sonal Sodha, Tim Bryant, and Andreas H. Gomoll. "Intralesional Osteophyte Regrowth Following Autologous Chondrocyte Implantation after Previous Treatment with Marrow Stimulation Technique." CARTILAGE 8, no. 2 (July 7, 2016): 131–38. http://dx.doi.org/10.1177/1947603516653208.
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Objective Bone marrow stimulation surgeries are frequent in the treatment of cartilage lesions. Autologous chondrocyte implantation (ACI) may be performed after failed microfracture surgery. Alterations to subchondral bone as intralesional osteophytes are commonly seen after previous microfracture and removed during ACI. There have been no reports on potential recurrence. Our purpose was to evaluate the incidence of intralesional osteophyte development in 2 cohorts: existing intralesional osteophytes and without intralesional osteophytes at the time of ACI. Study Design We identified 87 patients (157 lesions) with intralesional osteophytes among a cohort of 497 ACI patients. Osteophyte regrowth was analyzed on magnetic resonance imaging and categorized as small or large (less or more than 50% of the cartilage thickness). Twenty patients (24 defects) without intralesional osteophytes at the time of ACI acted as control. Results Osteophyte regrowth was observed in 39.5% of lesions (34.4% of small osteophytes and 5.1% of large osteophytes). In subgroup analyses, regrowth was observed in 45.8% of periosteal-covered defects and in 18.9% of collagen membrane–covered defects. Large osteophyte regrowth occurred in less than 5% in either group. Periosteal defects showed a significantly higher incidence for regrowth of small osteophytes. In the control group, intralesional osteophytes developed in 16.7% of the lesions. Conclusions Even though intralesional osteophytes may regrow after removal during ACI, most of them are small. Small osteophyte regrowth occurs almost twice in periosteum-covered ACI. Large osteophytes occur only in 5% of patients. Intralesional osteophyte formation is not significantly different in preexisting intralesional osteophytes and control groups.
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Baron, V. S., E. A. de St Remy, A. C. Dick, and D. F. Salmon. "Delay of harvest effects on forage yield and regrowth in spring and winter cereal mixtures." Canadian Journal of Plant Science 75, no. 3 (July 1, 1995): 667–74. http://dx.doi.org/10.4141/cjps95-112.
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Spring-planted mixtures of spring and winter cereals extend the grazing season and maximize dry matter yield if the initial defoliation is delayed until the milk stage of kernel development of the spring cereal component. However, fall regrowth may be less than spring-planted winter cereal monocrops. Research was conducted at Lacombe, Alberta to determine the effect of time of initial cut and winter cereal species on initial yield, regrowth yield and factors affecting regrowth (tiller density, water-soluble carbohydrate (WSC) and etiolated regrowth immediately post-cutting) of the winter cereal component of spring-seeded monocrops of fall rye (Secale cereale L.), winter triticale (× Triticosecale Wittmack) and winter wheat (Triticum aestivum L.) and in binary mixtures with spring barley (Hordeum vulgare L.). Treatments were planted in early May and harvested initially when the barley reached the boot (B), heads emerged (H), H + 2 wk, H + 4 wk and H + 6 wk stages. Three weeks after the initial cut a regrowth harvest was conducted. Initial yields of both mixtures and monocrops increased until approximately H + 4 wk and H + 6 wk respectively, with no differences due to species in the mixture. The effect of crop stage at initial harvest on regrowth was much larger than the species effect. Monocrop regrowth decreased almost linearly with delay of defoliation, while that of the mixture (winter and spring components combined) declined at a faster rate. Tiller density, WSC and etiolated regrowth also followed decreasing trends with time of initial cut in the monocrops and mixtures. These trends were due directly or indirectly to very low light intensities in the lower levels of the canopies of both cropping systems after H + 2 wk. Both initial and regrowth yields of the winter cereal component of mixtures involving rye and triticale were generally superior to those involving wheat. The ability of the winter cereal component to regrow in mixtures may be related to plant size and therefore ability to compete during initial growth. In general, the initial harvest of the mixture should occur no later than H + 2 wk of the spring cereal component in order to allow sufficient time for recovery of the winter cereal component after harvest. Otherwise, a spring-seeded winter cereal would be a better alternative for fall pasture. Key words: Delayed harvest, spring and winter cereals, forage yield, regrowth
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Kirschbaum, Anna, Oliver Bossdorf, and J. F. Scheepens. "Variation in regrowth ability in relation to land-use intensity in three common grassland herbs." Journal of Plant Ecology 14, no. 3 (January 15, 2021): 438–50. http://dx.doi.org/10.1093/jpe/rtab001.
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Abstract Aims Plant populations in managed grasslands are subject to strong selection exerted by grazing, mowing and fertilization. Many previous studies showed that this can cause evolutionary changes in mean trait values, but little is known about the evolution of phenotypic plasticity in response to land use. In this study, we aimed to elucidate the relationships between phenotypic plasticity—specifically, regrowth ability after biomass removal—and the intensity of grassland management and levels of temporal variation therein. Methods We conducted an outdoor common garden experiment to test if plants from more intensively mown and grazed sites showed an increased ability to regrow after biomass removal. We used three common plant species from temperate European grasslands, with seed material from 58 to 68 populations along gradients of land-use intensity, ranging from extensive (only light grazing) to very intensive management (up to four cuts per year). Important Findings In two out of three species, we found significant population differentiation in regrowth ability after clipping. While variation in regrowth ability was unrelated to the mean land-use intensity of populations of origin, we found a relationship with its temporal variation in Plantago lanceolata, where plants experiencing less variable environmental conditions over the last 11 years showed stronger regrowth in reproductive biomass after clipping. Therefore, while mean grazing and mowing intensity may not select for regrowth ability, the temporal stability of the environmental heterogeneity created by land use may have caused its evolution in some species.
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Fulkerson, WJ, K. Slack, and KF Lowe. "Variation in the response of Lolium genotypes to defoliation." Australian Journal of Agricultural Research 45, no. 6 (1994): 1309. http://dx.doi.org/10.1071/ar9941309.
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A glasshouse study was undertaken to determine the effect of defoliation frequency (three times at one leaf stage or once at three leaf stage of the regrowth cycle) and height (20, 50 or 120 mm) on regrowth, plant water soluble carbohydrate (WSC) reserves and root growth of seven Lolium perenne and two Lolium multiflorum cultivars. The sensitivity to defoliation was in decreasing order: biennial, PI perennials (cv. Ellett, AN2327, LP30, LP31), P2 perennials (cv. Kangaroo Valley, Yatsyn, Pacific). The effect of frequent, compared to infrequent, defoliation was to suppress regrowth by l00%, 95% and 80%; stubble WSC (mg/plant) by 97, 89 and 81%; root DM (g/plant) by 76, 60 and 6%, for biennial, P1 and P2, respectively. The effect of defoliation height accentuated this response, with biennials defoliated frequently at 20 mm stubble height all dying. Under defoliation conditions producing optimal yield, the yield was positively related to sensitivity to defoliation, giving regrowths of 2.90, 2.68, 1.53 g DM per plant for biennial, P1 and P2 plants, respectively. In view of the marked defoliation by cultivar interaction, response to defoliation should be considered as a possible selection criterion in any evaluation process.
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Lambert, D., R. Gannamani, and R. C. Blish. "Fuse Regrowth Kinetics." IEEE Transactions on Device and Materials Reliability 4, no. 4 (December 2004): 690–95. http://dx.doi.org/10.1109/tdmr.2004.838422.
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Joosten, Elbert A. J. "Corticospinal tract regrowth." Progress in Neurobiology 53, no. 1 (September 1997): 1–25. http://dx.doi.org/10.1016/s0301-0082(97)00024-5.
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Holley, Matthew C. "Hair cell regrowth." International Congress Series 1254 (November 2003): 1–6. http://dx.doi.org/10.1016/s0531-5131(03)01133-6.
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H. Loyn, Richard. "Birds in patches of old-growth ash forest, in a matrix of younger forest." Pacific Conservation Biology 4, no. 2 (1998): 111. http://dx.doi.org/10.1071/pc980111.
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Birds were studied at 57 sites in Mountain Ash forests in the Central Highlands of Victoria, Australia in spring and summer 1995/96. The sites represented 41 patches of old-growth forest (up to 390 ha in size) in a matrix of regrowth mostly from severe fires in 1939 (57 years previously), with multiple sites in the four largest patches of old-growth and eight sites in 1939 regrowth. Relative bird abundance was assessed by an area-search technique. Generalized linear modelling was used to develop predictive models by regressing abundance of groups of bird species against patch size, isolation and some basic habitat and context variables. Total bird abundance (of all species combined) tended to be higher in old-growth patches than in 1939 regrowth, but not significantly. There was no trend in total abundance with patch size or isolation. Fruit-eating birds tended to be commonest in small patches. Bark-foragers and uncommon birds favoured large patches, though the latter were most common in 1939 regrowth. More variation was explained by habitat and context variables such as aspect, altitude and forest structure. Unevenaged forest structure was often associated with small patches. It was concluded that old-growth forest patches can have similar values per hectare for forest birds whether they are large or small. The regrowth forest matrix appears to protect small patches from factors which reduce densities of forest birds in small forest patches in farmland. The data support the current policy of retaining all old-growth ash forest patches. A range of factors should be considered in selecting regrowth stands of various sizes to regrow as old forest of the future, including their intrinsic potential to develop particular habitats and produce a mix of forest stuctures in the landscape.
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KIM, JINKYUNG, FENG LUO, and XIUPING JIANG. "Factors Impacting the Regrowth of Escherichia coli O157:H7 in Dairy Manure Compost." Journal of Food Protection 72, no. 7 (July 1, 2009): 1576–84. http://dx.doi.org/10.4315/0362-028x-72.7.1576.
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The environmental variables affecting Escherichia coli O157:H7 regrowth in dairy manure compost were investigated. Factors evaluated were moisture content, strain variation, growth medium of inoculum, level of background microflora and inoculum, different days of composting, and acclimation at room temperature. A mathematical model was applied to describe E. coli O157 regrowth potential in compost. Repopulation occurred in autoclaved compost with a moisture content as low as 20% (water activity of 0.986) in the presence of background microflora of 2.3 to 3.9 log CFU/g. The population of all three E. coli O157 strains increased from ca. 1 to 4.85 log CFU/g in autoclaved compost, with the highest increase in the spinach-outbreak strain. However, E. coli O157 regrowth was suppressed by background microflora at ca. 6.5 log CFU/g. By eliminating acclimation at room temperature and increasing the inoculum level to ca. 3 log CFU/g, E. coli O157:H7 could regrow in the presence of high levels of background microflora. E. coli O157:H7 regrowth in the autoclaved compost collected from the field study was evident at all sampling days, with the population increase ranging from 3.49 to 6.54 log CFU/g. The fate of E. coli O157:H7 in compost was well described by a Whiting and Cygnarowicz-Provost model, with R2 greater than 0.9. The level of background microflora was a significant factor for both growth and death parameters. Our results reveal that a small number of E. coli O157 cells can regrow in compost, and both background microflora and moisture content were major factors affecting E. coli O157:H7 growth.
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Woinarski, J. C. Z., B. Rankmore, B. Hill, A. D. Griffiths, A. Stewart, and B. Grace. "Fauna assemblages in regrowth vegetation in tropical open forests of the Northern Territory, Australia." Wildlife Research 36, no. 8 (2009): 675. http://dx.doi.org/10.1071/wr08128.
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Context. World-wide, primary forest is in decline. This places increasing importance on understanding the use by biodiversity of regrowth (secondary) forest, and on the management of such regrowth. Aims. This study aimed to compare the terrestrial vertebrate assemblages in tropical eucalypt forests, regrowth in these forests (following clearing for pastoral intensification) and cleared land without regrowth, to provide evidence for developing management guidelines for regrowth vegetation in a region (the Daly catchment of the Northern Territory) subject to increasing demands for land-use intensification. Methods. The terrestrial vertebrate fauna was surveyed consistently at 43 quadrats sampling forest, 38 sampling regrowth and 19 sampling cleared land (formerly forest), and the faunal composition was compared with ordination and analysis of variance. Further analysis used generalised linear modelling to include consideration of the relative importance of disturbance (condition) of quadrats. Key results. Faunal assemblages in regrowth vegetation were found to be intermediate between cleared land and intact forest, and converged towards the faunal assemblage typical of intact forest with increase in the canopy height of the regrowth. However, even the tallest regrowth quadrats that were sampled supported relatively few hollow-associated species. The management of fire, weeds and grazing pressure substantially affected the faunal assemblages of the set of regrowth and intact forest quadrats, in many cases being a more important determinant of faunal attributes than was whether or not the quadrat had been cleared. Conclusions. In this region, regrowth vegetation has value as habitat for fauna, with this value increasing as the regrowth structure increases. The convergence of the faunal composition of regrowth vegetation to that of intact forest may be substantially affected by post-clearing management factors (including fire regime and level of grazing pressure and weed infestation). Implications. Regrowth vegetation should be afforded appropriate regulatory protection, with the level of protection increasing as the regrowth increases in stature.
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Liu, Changjin, Weiguo Lin, Chongran Feng, Xiangshuai Wu, Xiaohu Fu, Mu Xiong, Zhilong Bie, and Yuan Huang. "A New Grafting Method for Watermelon to Inhibit Rootstock Regrowth and Enhance Scion Growth." Agriculture 11, no. 9 (August 26, 2021): 812. http://dx.doi.org/10.3390/agriculture11090812.
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Grafting is a widely used technique in watermelon (Citrullus lanatus) production. However, cost of grafted seedlings is generally high as a result of intensive labor inputs for propagation using traditional grafting methods such as the manual removal of rootstock regrowth. This study developed a new grafting tool to physically remove the epidermis of pumpkin (C. maxima × C. moschata) and bottle gourd (Lagenaria siceraria) rootstock cotyledon base during grafting; we called this a new grafting method. Compared with the traditional grafting, the new grafting method significantly decreased the pumpkin rootstock regrowth rate from 100% to 8% in hole insertion and 2% in one cotyledon grafting, respectively. These attenuated rates for bottle gourd rootstock regrowth were 23% and 9% in hole insertion and one cotyledon grafting, respectively. The scion dry weights of new hole insertion and one cotyledon grafting were increased by 78% and 74% when pumpkin was used as rootstock as compared with traditional grafting without regrown rootstock removal, while the respective values were 33% and 17% in bottle gourd rootstock grafted plants. In addition, the time used for the new hole insertion grafting method to physically remove the epidermis of pumpkin rootstock cotyledon base was significantly shorter than the time required to remove the rootstock regrowth manually three times in the traditional grafting (4.2 s/plant vs. 9.3 s/plant). Similar results were also observed in the new one cotyledon grafting (4.2 s/plant vs. 8.8 s/plant). Taken together, this study presents a new method in watermelon grafting to reduce rootstock regrowth, therefore benefiting both scion growth and plant management, thus the development of this new method is clearly useful in watermelon production.
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Nguyen, Huu Trung, Hisashi Yamada, Toshikazu Yamada, Tokio Takahashi, and Mitsuaki Shimizu. "Fabrication and Evaluation of N-Channel GaN Metal–Oxide–Semiconductor Field-Effect Transistors Based on Regrown and Implantation Methods." Materials 13, no. 4 (February 18, 2020): 899. http://dx.doi.org/10.3390/ma13040899.
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We have demonstrated the enhancement-mode n-channel gallium nitride (GaN) metal-oxide field-effect transistors (MOSFETs) on homoepitaxial GaN substrates using the selective area regrowth and ion implantation techniques. Both types of MOSFETs perform normally off operations. The GaN-MOSFETs fabricated using the regrowth method perform superior characteristics over the other relative devices fabricated using the ion implantation technique. The electron mobility of 100 cm2/V·s, subthreshold of 500 mV/dec, and transconductance of 14 μs/mm are measured in GaN-MOSFETs based on the implantation technique. Meanwhile, the GaN-MOSFETs fabricated using the regrowth method perform the electron mobility, transconductance, and subthreshold of 120 cm2/V s, 18 μs/mm, and 300 mV/dec, respectively. Additionally, the MOSFETs with the regrown p-GaN gate body show the Ion/Ioff ratio of approximately 4 × 107, which is, to our knowledge, among the best results of GaN-MOSFETs to date. This research contributes a valuable information for the design and fabrication of power switching devices based on GaN.
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Fernandes, Susana, Inês B. Gomes, Sérgio F. Sousa, and Manuel Simões. "Antimicrobial Susceptibility of Persister Biofilm Cells of Bacillus cereus and Pseudomonas fluorescens." Microorganisms 10, no. 1 (January 13, 2022): 160. http://dx.doi.org/10.3390/microorganisms10010160.
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The present study evaluates the antimicrobial susceptibility of persister cells of Bacillus cereus and Pseudomonas fluorescens after their regrowth in suspension and as biofilms. Two conventional (benzalkonium chloride—BAC and peracetic acid—PAA) and two emerging biocides (glycolic acid—GA and glyoxal—GO) were selected for this study. Persister cells resulted from biofilms subjected to a critical treatment using the selected biocides. All biocide treatments developed B. cereus persister cells, except PAA that effectively reduced the levels of vegetative cells and endospores. P. fluorescens persister cells comprise viable and viable but non-culturable cells. Afterwards, persister cells were regrown in suspension and in biofilms and were subjected to a second biocide treatment. In general, planktonic cultures of regrown persister cells in suspension lost their antimicrobial tolerance, for both bacteria. Regrown biofilms of persister cells had antimicrobial susceptibility close to those regrown biofilms of biocide-untreated cells, except for regrown biofilms of persister P. fluorescens after BAC treatment, which demonstrated increased antimicrobial tolerance. The most active biocide against persister cells was PAA, which did not promote changes in susceptibility after their regrowth. In conclusion, persister cells are ubiquitous within biofilms and survive after critical biocide treatment. The descendant planktonic and biofilms populations showed similar properties as the original ones.
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Bashir, R., F. Hochberg, and R. Oot. "Regrowth Patterns of Glioblastoma Multiforme Related to Planning of Interstitial Brachytherapy Radiation Fields." Neurosurgery 23, no. 1 (June 1, 1988): 27–30. http://dx.doi.org/10.1227/00006123-198807000-00006.
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ABSTRACT Recognition of the local nature of glioblastoma has generated an increasing interest in treatment using radioactive implants (interstitial brachytherapy). A key issue in such implantation is the configuration of the radiation field in relation to the resected tumor. In particular, should radiation be provided to the area from which the tumor has been resected? To clarify this issue, we evaluated patterns of tumor regrowth into this resected area in 62 patients. Three patterns of computed tomographic scan-documented tumor regrowth were recognized: preferential (regrowth to refill the resected area only), circumferential (regrowth into the resected area and previously uninvolved contiguous brain) and away (local regrowth into noncontiguous brain, sparing the surgical bed). Regrowth of the tumor 6.3 to 6.8 months after resection was seen in 59 of 62 patients (95.2%). Preferential regrowth was seen in 32 of 62 patients (51.6%), and circumferential regrowth was seen in 27 of 62 patients (43.5%). Regrowth away was seen in 3 of 62 patients (4.8%). Radiation fields planned for interstitial brachytherapy must adequately include the resected area because of the high incidence of tumor regrowth into that area.
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Costa, Newton de Lucena, Antônio Neri Azevedo Rodrigues, João Avelar Magalhães, Amaury Burlamaqui Bendahan, Braz Henrique Nunes Rodrigues, and Francisco José de Seixas Santos. "Forage yield, chemical composition and morphogenesis of Brachiaria brizantha cv. Piatã under regrowth periods." Research, Society and Development 9, no. 1 (January 1, 2020): e133911801. http://dx.doi.org/10.33448/rsd-v9i1.1801.
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With the objective to evaluate the effects of regrowth period (14, 21, 28, 35 and 42 days) on green dry matter yield (GDMY), chemical composition and morphogenetic and structural characteristics of Brachiaria brizantha cv. Piatã, was carried out an experiment under greenhouse with natural conditions of light and temperature. GDMY yields and regrowth, leaf blade length, and leaf lifespan rate increased consistently (P<.05) with regrowth period, however the nitrogen, phosphorus, magnesium and potassium contents decreased as regrowth period, while calcium contents were not affected by regrowth period. Maximum GDMY, leaf appearance and elongation rate, and leaf blade length were obtained with regrowth periods at 38.2; 41.1; 31.3 and 38.9 days, respectively. These data suggest that cutting at 35 to 42 regrowth days were optimal for obtain maximum yields and regrowth of rich forage and pasture persistence.
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Fulkerson, W. J., and D. J. Donaghy. "Plant-soluble carbohydrate reserves and senescence - key criteria for developing an effective grazing management system for ryegrass-based pastures: a review." Australian Journal of Experimental Agriculture 41, no. 2 (2001): 261. http://dx.doi.org/10.1071/ea00062.
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This review examines the use of changes in soluble carbohydrate reserves, and the onset of senescence in ryegrass (Lolium spp.), as key criteria for successfully managing an intermittent grazing system for dairy cattle. Ryegrass is a ‘3-leaf ’ plant; that is, only about 3 green leaves/tiller exist at any one time with the initiation of a new leaf coinciding with senescence of the oldest fourth leaf. Thus, grazing pasture older than 3 leaves/tiller will not only lead to wastage of pasture but also the senescent material will reduce overall quality of herbage. Based on this, the time taken for 3 new leaves/tiller to regrow sets the maximum grazing interval. On the other hand, in a well-utilised dairy pasture, most ryegrass leaf has been removed and the plant relies on stored water-soluble carbohydrate reserves to grow new shoots and hence regain photosynthetic capacity. If the concentration of water-soluble carbohydrates is inadequate, because there has been insufficient time to replenish in the previous inter-grazing period, regrowth will be suppressed and this may also affect persistence in the longer term. Immediately after grazing, water-soluble carbohydrate reserves decline as they are used to regrow new shoots, and root growth stops. It is not until about 3/4 of a new leaf/tiller has regrown that the plant has adequate photosynthetic capacity for growth and maintenance and only then does water-soluble carbohydrate replenishment and root growth commence. Studies have shown that subsequent regrowth is suppressed if plants are redefoliated before the 2 leaves/tiller stage of regrowth. Also, the levels of potassium and nitrogen (as nitrates and other non-protein nitrogen products) may be very high and cause metabolic problems in stock grazing such pasture. Thus, replenishment of water-soluble carbohydrate reserves sets the minimum grazing interval at 2 leaves/tiller. The rate of accumulation of water-soluble carbohydrates in the plant is a function of input through photosynthesis (source) and output to growth and respiration (sinks). Thus, apart from grazing interval (which sets the time to replenish water-soluble carbohydrate plant reserves), water-soluble carbohydrate storage will be influenced by incoming solar radiation (cloud cover, day length, pasture canopy density) and energy needs of the plant through respiration (temperature, canopy mass) and growth. Relating grazing interval to leaf number places the emphasis on the readiness of plants to be grazed rather than on the animals’ requirements, with leaf appearance interval depending primarily on ambient temperature. This allows grazing interval to be expressed in a similar morphological stage of growth, irrespective of season or location. Setting grazing interval on these 2 criteria has been shown to maximise growth and persistence of ryegrass and optimise the levels of most nutrients in pasture required by dairy cattle including protein, water-soluble carbohydrates, calcium, potassium and magnesium. Metabolisable energy and fibre do not change appreciably up to the 3 leaves/tiller stage of regrowth. On the other hand, grazing pasture before 2 leaves/tiller not only retards regrowth and reduces persistence, it provides forage too high in potassium and protein (nitrates) and too low in water-soluble carbohydrates for dairy cattle.
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Negrutsa, Evgenii. "A REVIEW ON ORGANISM REGROWTH IN UV-BASED BALLAST WATER TREATMENT SYSTEMS FOR THE APPROVAL OF NEW G8 GUIDELINES." Chronos 7, no. 8(70) (October 13, 2022): 29–32. http://dx.doi.org/10.52013/2658-7556-70-8-11.
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In light of urgent need of approval of ballast water management system against the new G8 guidelines, organism regrowth within treated ballast water should be assessed. However, it’s the first time for mandatory demands on the evaluation of organism regrowth in ballast water. For the existances of DNA repair enzymes, UV-based systems have the risks of organisms regrowth after treatment. So far a range of algae and bacteria have been observed the recovery after UV irridation in the simulated ballast water or real ballast water during 1-day to 9-day culture. The target organisms, UV doses, recovery date and regrowth enviroment will be compared in such regrowth experiments. Also, the possible pathways of the regrowth will be discussed in the paper, with the consideration of both light repair and dark repair. Based on the reviews of current researches, the available methods will be explored to inhibit the organism regrowth in the UV-based ballast water treatment systems. For the compliance of the new G8 guidelines, UV-based systems are supposed to be assessed on organism regrowth, and the modificaiton methodologies were suggested for the currently approved UV-based systems to minimize the regrowth risks.
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Baas, P. W., and S. R. Heidemann. "Microtubule reassembly from nucleating fragments during the regrowth of amputated neurites." Journal of Cell Biology 103, no. 3 (September 1, 1986): 917–27. http://dx.doi.org/10.1083/jcb.103.3.917.
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We have proposed that stable microtubule (MT) fragments that resist depolymerization may serve as nucleating elements for the local control of MT dynamics in the axon (Heidemann, S. R., M. A. Hamborg, S. J. Thomas, B. Song, S. Lindley, and D. Chu, 1984, J. Cell Biol., 99:1289-1295). Here we report evidence that supports this proposal in studies on the role of MTs in the regrowth of neurites from the distal segments of amputated chick sensory neurites. Amputated neurites collapse to "beads" of axoplasm that rapidly regrow (Shaw, G., and D. Bray, 1977, Exp. Cell Res., 104:55-62). We examined both unarrested regrowth and regrowth after MT disassembly by either cold (-5 degrees C for 2 h) or nocodazole (0.1 microgram/ml for 15-20 min). In all these cases regrowth occurred at 3.5-4.5 micron/min with no delay times other than the times to reach 37 degrees C or rinse out the nocodazole. Electron micrographs of untreated beads show many MTs of varying lengths, while those of cold- and nocodazole-treated beads show markedly shorter MTs. The robust regrowth of neurites from beads containing only very short MTs argues against unfurling of intact MTs from the bead into the growing neurite. Electron micrographs of cold-treated beads lysed under conditions that cause substantial MT depolymerization in untreated intact neurites show persistent MT fragments similar to those in unlysed cold-treated beads. We interpret this as evidence that the MT fragments in cold-treated beads are somehow distinct from the majority of the MT mass that had depolymerized. Collapsed neurites treated with a higher dose of nocodazole (1.0 microgram/ml for 15-20 min) were completely devoid of MTs and regrew only after a 15-20 min delay in two cases but never regrew in 11 other cases. We found that MTs did not return in beads treated with 1.0 microgram/ml nocodazole even 30 min after removal of the drug. It was unlikely that the inability of these beads to reassemble MTs was due to incomplete removal of nocodazole in that a much higher dose (20 micrograms/ml nocodazole) could be quickly rinsed from intact neurites. Beads treated with 1.0 microgram/ml nocodazole could, however, be stimulated to reassemble MTs and regrow neurites by treatment with taxol. We conclude that the immediate, robust regrowth of neurites from collapsed beads of axoplasm requires MT nucleation sites to support MT reassembly.(ABSTRACT TRUNCATED AT 400 WORDS)
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VIRKAJÄRVI, P. "Effects of defoliation height on regrowth of timothy and meadow fescue in the generative and vegetative phases of growth." Agricultural and Food Science 12, no. 3-4 (January 3, 2003): 177–93. http://dx.doi.org/10.23986/afsci.5755.
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Post-defoliation carbohydrate stores, leaf area and the number of active meristems are important factors affecting the subsequent regrowth of grasses. Defoliation height affects the magnitude of all these factors. Timothy (Phleum pratense L.) and meadow fescue (Festuca pratensis Huds.) are the two most common pasture species in Finland, but little is known about their response to defoliation height. In this study the effect of three defoliation heights, 3, 6 and 9 cm, on the regrowth rates of timothy and meadow fescue in both the generative (JuneJuly) and vegetative (August) phases of growth were examined in two one-year experiment in year 2000 and 2001. In addition, the main postdefoliation parameters were measured and their contributions to regrowth were studied. In JuneJuly 2000 the regrowth rates, kg dry matter ha-1 d-1, of both species increased linearly by 19% by increasing the cutting height from 3 to 9 cm. In August 2000 the regrowth rates increased by 27% and the cumulative regrowth dry matter yield increased by 29%. In 2001 the defoliation height had no effect on the regrowth rates but the cumulative regrowth yield increased by 10% by increasing the cutting height. Meadow fescue produced 821% higher cumulative regrowth yields than timothy. In the reproductive phase, the regrowth rate of timothy is dependent on the population density of vegetative tillers but for meadow fescue population density did not have such importance. In vegetative phase there was no single factor essential for regrowth rates of either of the species.;
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Yates, Darran. "Separating growth from regrowth." Nature Reviews Neuroscience 13, no. 10 (September 12, 2012): 669. http://dx.doi.org/10.1038/nrn3352.
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Dabek, Robert J., William G. Austen, and Branko Bojovic. "Laser-assisted Hair Regrowth." Plastic and Reconstructive Surgery - Global Open 7, no. 4 (April 2019): e2157. http://dx.doi.org/10.1097/gox.0000000000002157.
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Torres, Miguel. "Limb regrowth takes two." Nature 533, no. 7603 (April 27, 2016): 328–30. http://dx.doi.org/10.1038/nature17889.
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Frankish, Helen. "Peptide promotes axonal regrowth." Lancet Neurology 1, no. 3 (July 2002): 142. http://dx.doi.org/10.1016/s1474-4422(02)00089-3.
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Whitehead, Mark. "Editorial: Degrowth or Regrowth?" Environmental Values 22, no. 2 (April 1, 2013): 141–45. http://dx.doi.org/10.3197/096327113x13581561725077.
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Scapinelli, R. "Bone regrowth after laminectomy." Journal of Bone and Joint Surgery. British volume 76-B, no. 1 (January 1994): 163. http://dx.doi.org/10.1302/0301-620x.76b1.8300668.
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Aleksandrov, L. N., S. V. Lozovskii, and S. Y. Knyazev. "Silicon zone sublimation regrowth." Physica Status Solidi (a) 107, no. 1 (May 16, 1988): 213–23. http://dx.doi.org/10.1002/pssa.2211070122.
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Wu, X., K. H. Gulden, M. Thomas, G. Wilson, J. Walker, G. H. Döhler, J. R. Whinnery, and J. S. Smith. "Selectively masked MBE regrowth." Journal of Crystal Growth 127, no. 1-4 (February 1993): 896–99. http://dx.doi.org/10.1016/0022-0248(93)90755-l.
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Paul, Matthew J., Nicole T. George, Irving Zucker, and Matthew P. Butler. "Photoperiodic and hormonal influences on fur density and regrowth in two hamster species." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 293, no. 6 (December 2007): R2363—R2369. http://dx.doi.org/10.1152/ajpregu.00520.2007.
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Temperate and boreal mammals undergo seasonal changes in pelage that facilitate thermoregulation in winter and summer. We investigated photoperiodic influences on pelage characteristics of male Siberian and Syrian hamsters. Fur density (mg fur/cm2 skin) was measured by weighing the shavings of fur patches removed from the dorsal and ventral surfaces of hamsters maintained in long days (LDs) or transferred to short days (SDs). Patches were reshaved 3 wk later to assess fur regrowth (mg regrown fur/cm2 skin). Fur density was greater in SD than in LD Siberian hamsters after 11 wk of differential phototreatment. The onset of increased fur density in SDs was accompanied by a transient increase in fur regrowth (11–14 wk on the dorsal surface and 7–10 and 11–14 wk on the ventral surface), suggestive of a seasonal molting process. Fur density, body mass, and pelage color of Siberian hamsters returned to values characteristic of LD males after a similar duration of prolonged (>27 wk) SD treatment and appear to be regulated by a similar or common interval-timing mechanism. In Syrian hamsters, dorsal fur density, fur regrowth, and hair lengths were greater in SD than in LD males. Castration increased and testosterone (T) treatment decreased dorsal and ventral fur regrowth in LD and SD hamsters, but the effects of T manipulations on fur density were limited to a decrease in dorsal fur density after T treatment. Decreased circulating T in SDs likely contributes to the seasonal molt of male hamsters by increasing the rate of fur growth during the transition to the winter pelage.
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Gözen, İrep, and Banu Örmeci. "Effect of daylight on regrowth of bacteria in anaerobically digested sludge." Water Science and Technology 62, no. 2 (July 1, 2010): 364–69. http://dx.doi.org/10.2166/wst.2010.268.
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This study investigated the regrowth of total coliform, Salmonella, and Clostridium perfringens in anaerobically digested sludge after centrifuge dewatering in the presence and absence of daylight. Sludge cake and centrate samples were collected from a treatment plant, and half of the samples was stored in daylight and the other half was stored in dark for three weeks. The bacteria levels in the cake and centrate samples were measured periodically throughout the storage period, and all three bacteria showed substantial regrowth. Presence of daylight increased the regrowth of Salmonella both in sludge cake and centrate, and increased the regrowth of total coliform in centrate. Salmonella exhibited the highest regrowth rate in cake among the three bacteria tested both in the presence and absence of light. Daylight did not appear to have a significant impact on the regrowth of Clostridium perfringens in cake and centrate, and on the regrowth of total coliform in cake. This might, however, be caused by the masking effect of the higher initial numbers of these bacteria in the samples. There is need for more research to thoroughly understand the effect of daylight on the regrowth of sludge bacteria.
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Burge, Wylie D., Nancy K. Enkiri, and David Hussong. "Salmonella regrowth in compost as influenced by substrate (salmonella regrowth in compost)." Microbial Ecology 14, no. 3 (November 1987): 243–53. http://dx.doi.org/10.1007/bf02012944.
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