scholarly journals INFLUENCE OF ELEPHANT DUNG ON FECUNDITY AND GROWTH RATE OF EARTHWORM Eudrilus eugeniae

2019 ◽  
Vol 7 (6) ◽  
pp. 587-692
Author(s):  
Deepthi MP ◽  
◽  
Jijo George ◽  
P Kathireswari ◽  
◽  
...  
Keyword(s):  
Growth Rate ◽  
Eudrilus Eugeniae ◽  
Elephant Dung

Effect of different organic substrates on reproductive biology, growth rate and offtake of the African night crawler earthworm (Eudrilus eugeniae)

2020 ◽  
Vol 10 (3) ◽  
pp. 395-407
Author(s):  
Fred Kabi ◽  
Denis Kayima ◽  
Abasi Kigozi ◽  
Eric Zadok Mpingirika ◽  
Ronald Kayiwa ◽  
...  
Keyword(s):  
Growth Rate ◽  
Reproductive Biology ◽  
Organic Substrates ◽  
Eudrilus Eugeniae

scholarly journals Application of probiotic Bacillus spp. isolated from African nightcrawler (Eudrilus eugeniae) on Nile Tilapia (Oreochromis niloticus L.)

2020 ◽  
Author(s):  
J. Samson ◽  
K.M. Quiazon ◽  
C. Choresca
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Disease Resistance ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Challenge Test ◽  
Feed Utilization ◽  
Eudrilus Eugeniae ◽  
Feed Conversion ◽  
Commercial Diet

AbstractDue to the emergence of antibiotic-resistant pathogens, probiotics in aquaculture are used for the prevention of infectious microbial diseases and substitute for antibiotics and chemotherapeutics. In this study, we evaluated the effect of probiotic Bacillus spp. isolated from African nightcrawler (Eudrilus eugeniae) on the growth, feed utilization, and disease resistance of Nile tilapia (Oreochromis niloticus). Four probiotic strains of Bacillus spp. (ANSCI9, BFAR9, RM3, and RM10) were individually incorporated in the commercial diet (control) at 108 CFU g-1 of feed. The experimental fish were fed at 5% of their body weight for 30 days, and subjected to a 14-day Aeromonas hydrophila challenge test afterward. The results showed the probiotic-treated groups have higher (P<0.05) average body weight (ABW) (4.51 ± 0.34 g) than the control (3.89 ± 0.17 g). The BFAR9 (2.73 ± 0.26 g) and RM10 (3.15 ± 0.30 g) showed higher (P<0.05) absolute growth (AG) than the control (2.20 ± 0.16 g). Furthermore, RM10 had higher (P<0.05) specific growth rate (SGR) (1.60 ± 0.10 % day-1) and relative growth rate (RGR) (181.39 ± 18.16 %) than the control (SGR=1.29 ± 0.07 % day-1; RGR=129.84 ± 9.77 %). Consequently, RM10 had significantly lower (P<0.05) feed conversion ratio (FCR) (1.99 ± 0.13) than the control (2.60 ± 0.16). The challenge test revealed that the probiotic-treated groups have higher (P<0.05) survival (81.25 ± 9.57 %) than the control (55.00 ± 19.15 %). These results revealed that the probiotic Bacillus spp. isolated from E. eugeniae improved the growth, feed utilization, and the disease resistance of Nile tilapia.

The threshold energy for atom displacement in fcc metals

1990 ◽  
Vol 48 (4) ◽  
pp. 530-531
Author(s):  
Wilfried Sigle ◽  
Matthias Hohenstein ◽  
Alfred Seeger
Keyword(s):  
Growth Rate ◽  
Elevated Temperatures ◽  
Threshold Energy ◽  
Dislocation Loops ◽  
Absolute Minimum ◽  
Voltage Electron ◽  
Atom Displacement ◽  
Electron Microscopes ◽  
Fcc Metal

Prolonged electron irradiation of metals at elevated temperatures usually leads to the formation of large interstitial-type dislocation loops. The growth rate of the loops is proportional to the total cross-section for atom displacement,which is implicitly connected with the threshold energy for atom displacement, Ed . Thus, by measuring the growth rate as a function of the electron energy and the orientation of the specimen with respect to the electron beam, the anisotropy of Ed can be determined rather precisely. We have performed such experiments in situ in high-voltage electron microscopes on Ag and Au at 473K as a function of the orientation and on Au as a function of temperature at several fixed orientations.Whereas in Ag minima of Ed are found close to <100>,<110>, and <210> (13-18eV), (Fig.1) atom displacement in Au requires least energy along <100>(15-19eV) (Fig.2). Au is thus the first fcc metal in which the absolute minimum of the threshold energy has been established not to lie in or close to the <110> direction.

Saturation mechanism and generated viscosity in gravito-turbulent accretion disks

2020 ◽  
Vol 640 ◽  
pp. A53
Author(s):  
L. Löhnert ◽  
S. Krätschmer ◽  
A. G. Peeters
Keyword(s):  
Growth Rate ◽  
Numerical Simulations ◽  
Accretion Disks ◽  
Gravitational Instability ◽  
Turbulent Viscosity ◽  
Radial Distance ◽  
Maximum Growth ◽  
Wave Number ◽  
Radiative Cooling ◽  
Mixing Length

Here, we address the turbulent dynamics of the gravitational instability in accretion disks, retaining both radiative cooling and irradiation. Due to radiative cooling, the disk is unstable for all values of the Toomre parameter, and an accurate estimate of the maximum growth rate is derived analytically. A detailed study of the turbulent spectra shows a rapid decay with an azimuthal wave number stronger than ky−3, whereas the spectrum is more broad in the radial direction and shows a scaling in the range kx−3 to kx−2. The radial component of the radial velocity profile consists of a superposition of shocks of different heights, and is similar to that found in Burgers’ turbulence. Assuming saturation occurs through nonlinear wave steepening leading to shock formation, we developed a mixing-length model in which the typical length scale is related to the average radial distance between shocks. Furthermore, since the numerical simulations show that linear drive is necessary in order to sustain turbulence, we used the growth rate of the most unstable mode to estimate the typical timescale. The mixing-length model that was obtained agrees well with numerical simulations. The model gives an analytic expression for the turbulent viscosity as a function of the Toomre parameter and cooling time. It predicts that relevant values of α = 10−3 can be obtained in disks that have a Toomre parameter as high as Q ≈ 10.

TEMPERATURE DEPENDENCE OF THE CRYSTAL GROWTH RATE IN POLAR GLACIERS

1987 ◽  
Vol 48 (C1) ◽  
pp. C1-661-C1-662 ◽  
Author(s):  
J. R. PETIT ◽  
P. DUVAL ◽  
C. LORIUS
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Temperature Dependence ◽  
Crystal Growth Rate
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