Calculation of Attachment Energies and Relative Volume Growth Rates As an Aid to Polymorph Prediction

2005 ◽  
Vol 5 (3) ◽  
pp. 879-885 ◽  
Author(s):  
David S. Coombes ◽  
C. Richard A. Catlow ◽  
Julian D. Gale ◽  
Andrew L. Rohl ◽  
Sarah L. Price
Keyword(s):  
Growth Rates ◽  
Volume Growth ◽  
Relative Volume

Distribution of relative growth rates and variation of cytohistological zonation in apical meristems of seedlings of two contrasting open-pollinated jack pine (Pinusbanksiana) families

1984 ◽  
Vol 14 (3) ◽  
pp. 297-310 ◽  
Author(s):  
Antoine Kremer
Keyword(s):  
Growth Rates ◽  
Apical Meristem ◽  
Volume Growth ◽  
Jack Pine ◽  
Relative Volume ◽  
Relative Growth ◽  
Relative Growth Rates ◽  
Apical Dome ◽  
Dome Growth ◽  
General Method

A general method is developed to obtain relative growth rates in different parts of an apical meristem, bare apical dome, internode, and whole apical dome. Expressions are given for transverse, longitudinal, and volume growth. It is shown that these growth rates depend on only four parameters, radius (Ro) and height (Ho) of the bare apical dome and transverse (r) and longitudinal (h) plastochron ratios. A method is described to obtain relative volumes of different zones in apices showing cytohistological zonation using relative area measurements on median longitudinal sections. Both methods are applied to a practical example, on ontogenetical variation of seedlings originating from two open-pollinated families of jack pine (Pinusbanksiana Lamb.) that exhibited a contrasting pattern of height growth in previous studies. Both families differ in their plastochron duration (PD) and this difference can be related to different distributions of growth rates in the apical meristem. PD values range, between 16–6 h in the first family, and between 12–4 h in the second one. Most family differences appear on bare apical dome growth rates and on allometric coefficients between bare apical dome growth and intermode growth. As an example, bare apical dome radial relative growth rates per PD varies during ontogeny from 0.004 to 0.008 and then decreases to −0.011 during the first 70 days after germination for the first family. Corresponding values for the second family are 0.001, 0.007, and −0.004. There are also ontogenetical variations in cytohistological zonation. Both families show an increase in the apical initial plus central mother cell zone relative volume following the decrease of plastochron duration. However, no significant differences between families are obtained for relative volumes of cytohistological zones. Relationships between distributions of growth rates and changes of cytohistological zonation are discussed.

Tourist Attractiveness of the Central Federal District Regions in the Internet

2018 ◽  
Vol 2018 (3) ◽  
pp. 91-108
Author(s):  
Ekaterina Buzulukova
Keyword(s):  
Social Media ◽  
Growth Rates ◽  
Volume Growth ◽  
Federal District ◽  
The Internet ◽  
Direct Impact ◽  
Internet Site ◽  
Small Cities ◽  
Federal Districts ◽  
Budget Restriction

The article is devoted to investigation of methods to improve tourist attractiveness of areas of the Central Federal districts with the help of internet sites and activity in social media. Literature illustrates the direct impact of social media on increasing region’s touristic attractiveness. In budget restriction conditions the development of touristic strategy and its realization may be very expensive project for small cities, but developing news streams and social channels, due to possibilities of content generation by users, can be outstanding opportunity to raise the touristic attractiveness. The author conducts the research of touristic services volume, growth rates of Central Federal districts, and correlates them with the tourist portal development and social media activity. The data shows the bigger influence of social media activity on tourist services volume than attendance of internet site.

Response of Underplanted Douglas-Fir to Herbicide Injection of Sclerophyll Hardwoods in Southwest Oregon

1990 ◽  
Vol 5 (3) ◽  
pp. 86-89 ◽  
Author(s):  
Ole T. Helgerson
Keyword(s):  
Pseudotsuga Menziesii ◽  
Growth Rates ◽  
Volume Growth ◽  
Moisture Stress ◽  
Douglas Fir ◽  
First Year ◽  
Southwest Oregon

Abstract Douglas-fir (Pseudotsuga menziesii) container-grown plug (1-0) and nursery-grown bareroot (2-0) seedlings were planted in southwest Oregon beneath sclerophyll hardwoods injected with triclopyr amine or left untreated. Sixty percent of the hardwood canopy was killed by injection. Seedlings beneath treated hardwoods experienced greater daytime moisture stress but lower predawn moisture stress. Plugs grew more in the first year than bareroots. Five-year survival averaged 100% and 96% for plugs and bareroots under treated hardwoods, 83% and 73% under untreated hardwoods. Herbicide injection of hardwoods was associated with increased height, diameter, and volume growth rates in the underplanted Douglas-fir and seems necessary for establishing Douglas-fir in this environment. West. J. Appl. For. 5(3):86-89, July 1990.

scholarly journals Spatiotemporal Differences in the Regional Cortical Plate and Subplate Volume Growth during Fetal Development

2020 ◽  
Vol 30 (8) ◽  
pp. 4438-4453 ◽  
Author(s):  
Lana Vasung ◽  
Caitlin K Rollins ◽  
Clemente Velasco-Annis ◽  
Hyuk Jin Yun ◽  
Jennings Zhang ◽  
...  
Keyword(s):  
Growth Rates ◽  
Cortical Neurons ◽  
Regional Growth ◽  
Relative Size ◽  
Volume Growth ◽  
Cortical Plate ◽  
Relative Growth Rates ◽  
Significant Difference ◽  
Growth Differences ◽  
Genetically Determined

Abstract The regional specification of the cerebral cortex can be described by protomap and protocortex hypotheses. The protomap hypothesis suggests that the regional destiny of cortical neurons and the relative size of the cortical area are genetically determined early during embryonic development. The protocortex hypothesis suggests that the regional growth rate is predominantly shaped by external influences. In order to determine regional volumes of cortical compartments (cortical plate (CP) or subplate (SP)) and estimate their growth rates, we acquired T2-weighted in utero MRIs of 40 healthy fetuses and grouped them into early (<25.5 GW), mid- (25.5–31.6 GW), and late (>31.6 GW) prenatal periods. MRIs were segmented into CP and SP and further parcellated into 22 gyral regions. No significant difference was found between periods in regional volume fractions of the CP or SP. However, during the early and mid-prenatal periods, we found significant differences in relative growth rates (% increase per GW) between regions of cortical compartments. Thus, the relative size of these regions are most likely conserved and determined early during development whereas more subtle growth differences between regions are fine-tuned later, during periods of peak thalamocortical growth. This is in agreement with both the protomap and protocortex hypothesis.

Development and growth of even-aged stands of Douglas-fir and grand fir

1986 ◽  
Vol 16 (2) ◽  
pp. 367-372 ◽  
Author(s):  
Bruce C. Larson
Keyword(s):  
Growth Rates ◽  
Volume Growth ◽  
Basal Area ◽  
Douglas Fir ◽  
Stem Volume ◽  
Mixed Stands ◽  
Site Class ◽  
Development Patterns ◽  
Western Washington ◽  
Eastern Washington

Stand development patterns and growth rates of even-aged mixed stands of Douglas-fir (Pseudotsugamensiesii Mirb. Franco) and grand fir (Abiesgrandis Dougl. Lindl.) were investigated by stand reconstruction in eastern Washington. Although Douglas-fir dominated the stands early, grand fir of the same age eventually overtook the tallest Douglas-firs. Dominant trees of both species were found to have highly variable taper form (based on basal area to height ratios), although a linear relationship existed in other crown classes. Stem volume growth rates were determined by reconstructing past diameters and heights and were found comparable to site class IV Douglas-fir in western Washington. Intensive management, especially planting and thinning, could improve upon the observed mean annual increments of 800 board feet per acre at 80 years of age.

The relative volume growth of minimal submanifolds

2002 ◽  
Vol 79 (6) ◽  
pp. 507-514 ◽  
Author(s):  
Steen Markvorsen ◽  
Vicente Palmer
Keyword(s):  
Volume Growth ◽  
Minimal Submanifolds ◽  
Relative Volume

The influence of beam defocus on volume growth rates for electron beam induced platinum deposition

2008 ◽  
Vol 19 (48) ◽  
pp. 485302 ◽  
Author(s):  
H Plank ◽  
C Gspan ◽  
M Dienstleder ◽  
G Kothleitner ◽  
F Hofer
Keyword(s):  
Electron Beam ◽  
Growth Rates ◽  
Volume Growth ◽  
Platinum Deposition

Wood ash as a fertilizer on drained mires — growth and foliar nutrients of Scots pine

2005 ◽  
Vol 35 (11) ◽  
pp. 2734-2742 ◽  
Author(s):  
Mikko Moilanen ◽  
Klaus Silfverberg ◽  
Hannu Hökkä ◽  
Jorma Issakainen
Keyword(s):  
Scots Pine ◽  
Field Experiments ◽  
Volume Growth ◽  
Wood Ash ◽  
Relative Volume ◽  
Foliar Nutrients ◽  
Nutrient Concentrations ◽  
Anova Model ◽  
Foliar Nutrient ◽  
High Doses

The availability of phosphorus (P) and potassium (K) commonly limits tree growth on drained peatlands. The nutritional status and volume growth of Scots pine (Pinus sylvestris L.) after varying doses of wood ash fertilization were investigated in seven field experiments located on deep-peated sites in Finland between latitudes 63°N and 67°N. Needle samples were taken 14–20 years after fertilization and trees measured 15 years after fertilization. Annual growth rates and differences in foliar nutrients were analyzed with a two-way ANOVA model. A regression model was used in the analysis of periodic relative volume growth. High doses of wood ash (100–265 kg P·ha–1, 225–450 kg K·ha–1) resulted in greater changes in foliar nutrient concentrations and in a stronger growth response than low doses (5–50 kg P·ha–1, 14–210 kg K·ha–1). Significant increases in needle mass and concentrations of P, K, and B were observed in the ash-fertilized stands, with a good status for these elements 20 years after fertilization. Depending on the ash dose, the mean annual volume growth was 0.5–1.4 m3·ha–1 higher than in the control plots during the 15 year postfertilization period.

The relative volume growth of minimal submanifolds

2002 ◽  
Vol 79 (6) ◽  
pp. 507-514
Author(s):  
S. Markvorsen ◽  
V. Palmer
Keyword(s):  
Volume Growth ◽  
Minimal Submanifolds ◽  
Relative Volume
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