CHARACTERIZATION Of Bi-BASED WHISKERS BY THE METHOD OF Al2O3-SEEDED GLASSY QUENCHED PLATELETS

2002 ◽  
Vol 16 (28n29) ◽  
pp. 4497-4501 ◽  
Author(s):  
S. KISHIDA ◽  
H. UEMOTO
Keyword(s):  
Full Width Half Maximum ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Previous Method ◽  
Full Width ◽  
Temperature Transition ◽  
High Quality ◽  
Maximum Value ◽  
Good Crystallinity

We prepared the Bi 2 Sr 2 Ca n-1 Cu n O y (Bi-based) whiskers by the method of Al 2 O 3-seeded by the method was about 3 times larger than that by the previous method glassy quenched platelets (ASGQP). The maximum growth rate of the whiskers obtained without any Al 2 O 3 seeding. From the resistance-temperature (R-T) characteristics, we found that the temperature transition widths of the Bi-2212 and the Bi-2223 phases were about 2K and 4K, respectively. In addition, the whiskers showed that the FWHM (full-width-half-maximum) value of the (0010) XRD peak was less than 0.06°. The critical current density of the whiskers was more than 104 A/cm 2 at 60K and 0T. The results indicate that the whiskers grown by the ASGQP method have good crystallinity and high quality.

Isolation and Physiological Characterization of Thiothrix sp.

1994 ◽  
Vol 29 (7) ◽  
pp. 261-269 ◽  
Author(s):  
V. Tandoi ◽  
N. Caravaglio ◽  
D. Di Dio Balsamo ◽  
M. Majone ◽  
M. C. Tomei
Keyword(s):  
Growth Yield ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Yield Coefficient ◽  
Simultaneous Presence ◽  
Mixotrophic Growth ◽  
Physiological Characterization ◽  
South Italy ◽  
Mixotrophic Conditions

Thiothrix CT3 was isolated in pure culture by micromanipulation technique. The growth of this microorganism was analyzed in autotrophic, heterotrophic and mixotrophic conditions, in a bicarbonate-containing mineral medium supplemented with thiosulphate and/or acetate. Thiothrix CT3 was able to grow in all the conditions examined: the maximum growth rates estimated were 1.8, 2.5 and 2.5 d−1 respectively. The capacity of this organism to grow autotrophically, as supposed by Winogradsky in 1888, is a strong advantage over the other bacteria present in activated sludge, when sulphides are produced or carried by the sewer. Both the maximum growth rate and growth yield coefficient shown during heterotrophic and mixotrophic growth were comparable, indicating that the simultaneous presence of two substrates (acetate and a reduced sulphur compound) does not give it any particular advantage. The strong presence of Thiothrix spp. in many plants located in South Italy can be explained by the wide nutritional versatility of this filamentous bacterium.

scholarly journals Effect of Annealing on Innovative CsPbI3-QDs Doped Perovskite Thin Films

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 101
Author(s):  
Pao-Hsun Huang ◽  
Yu-Hao Chen ◽  
Shui-Yang Lien ◽  
Kuan-Wei Lee ◽  
Na-Fu Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Full Width Half Maximum ◽  
Annealing Temperature ◽  
Full Width ◽  
Half Maximum ◽  
Lead Iodide ◽  
High Quality ◽  
Peak Fitting ◽  
Hot Injection ◽  
Different Temperatures

In this study, a simple hot-injection method to synthesize high-quality inorganic perovskite cesium lead iodide (CsPbI3) quantum-dots (QDs) was demonstrated. Adding CsPbI3 QDs into the organic perovskite methylamine lead triiodide (CH3NH3PbI3) to form a composite perovskite film, annealed by different temperatures, was found to be effectively enhanced by the perovskite crystallization. The intensity of the preferred peak (110) of MAPbI3 was enhanced by increasing the size of the crystal and reducing the cluster crystal. The densest film can be found at annealing temperature of 140 °C. The full width half maximum of MAPbI3 and CsPbI3 was analyzed through XRD peak fitting. This was a huge breakthrough for QDs doped perovskite films.

scholarly journals Nutritional options and implications for maximum growth rate of steers

1995 ◽  
pp. 217-222
Author(s):  
G.P. Cosgrove ◽  
P.D. Muir ◽  
M.G. Lambert
Keyword(s):  
Red Clover ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Annual Ryegrass ◽  
High Quality ◽  
Potential Growth ◽  
Feedlot Steers ◽  
Maize Grain ◽  
Autumn And Winter ◽  
Mature Size

Estimates of age and weight at mature size are required for the development of decision-support and mathematical models to describe beef growth. Interim results from an experiment designed to quantify the liveweight gain of steers from weaning to mature size are reported in this paper. Three groups of 28 steers have been fed for 2 years from weaning (8 months) to 32 months of age on the following treatments: resident, ryegrass-white clover based pasture (R); a high quality pasture option based on annual ryegrass in winter and spring, and red clover and lotus in summer and autumn (HQ); and a 70% maize grain : 30% silage diet offered under feedlot conditions (F). Average daily gains from weaning to 30 months of age and liveweight at 30 months were 0.69 kg/hd/day, and 709 kg, 0.78 kgfhdlday and 772 kg, and 0.91 kglbdlday and 858 kg for R, HQ and F treatments, respectively. Feedlot steers had a greater fat depth over the 12113th rib than either of the pasture fed treatments, when measured at the same age. In addition, both pasture groups have shown seasonality in liveweight gain, with periods of low liveweight gain in late autumn and winter of the second and third years. Results are discussed in relation to the nutritional contrasts between treatments. Keywords: feedlot, cattl.e, liveweight gain, potential growth

Build Up and Characterization of Ultraslow Nuclear Burn-Up Wave in Epithermal Neutron Multiplying Medium

2021 ◽  
Author(s):  
Dipanjan Ray ◽  
Satya Prakash Saraswat ◽  
Manish Kumar ◽  
Om Pal Singh ◽  
Prabhat Munshi
Keyword(s):  
Full Width Half Maximum ◽  
Epithermal Neutron ◽  
External Source ◽  
Full Width ◽  
Slab Geometry ◽  
Transient Time ◽  
Parametric Studies ◽  
The Media ◽  
Uranium Plutonium

Abstract A study is carried out on the build-up and characterization of ultraslow nuclear burn-up wave in epithermal neutron multiplying medium for slab geometry. Uranium-Plutonium fissile medium is considered for the calculation. Transient part of the wave is characterized by Transient Time (TT), Transient Length (TL) and TT and TL are defined as the time and distance required to develop asymptotic neutron flux propagating through the media. Steady-state part of the wave is characterized with wave velocity and reaction zone width (Full Width Half Maximum (FWHM) and Full Width 10% of Maximum (FW10M)). Parametric studies are carried out for different enrichment of U235 and different values of external source of neutron. It is observed that TT, TL, FWHM, and FW10M decrease with the increase in enrichment. The velocity of the wave increases with the enrichment of U235. This study is beneficial for understanding the characteristics of nuclear burn-up wave in epithermal region as it will help in further researches in this area.

scholarly journals Characterization of Listeria monocytogenes Originating from the Spanish Meat-Processing Chain

Foods ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 542 ◽  
Author(s):  
Rosa Capita ◽  
Amanda Felices-Mercado ◽  
Camino García-Fernández ◽  
Carlos Alonso-Calleja
Keyword(s):  
Listeria Monocytogenes ◽  
Clinical Importance ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Meat Processing ◽  
Hygiene Practices ◽  
Adhesion Ability ◽  
Listeria Ivanovii ◽  
Good Hygiene

Using agglutination techniques, 118 Listeria monocytogenes isolates from red meat and poultry were serotyped. Strains were ascribed to the serotypes 4b/4e (44.1% of the strains), 1/2 (a, b or c; 28.0%), 4c (6.8%), 4d/4e (5.9%) and 3 (a, b or c; 2.5%). Among these are the serotypes most frequently involved in cases of human listeriosis. The susceptibility of 72 strains to 26 antibiotics of clinical importance was determined by disc diffusion (Clinical and Laboratory Standards Institute; CLSI). High levels of resistance were observed to cefoxitin (77.8% of the strains showed resistance), cefotaxime (62.5%), cefepime (73.6%), and nalidixic acid (97.2%), nitrofurantoin (51.4%) and oxacillin (93.1%). Less than 3% of the strains showed resistance to the antibiotic classes used in human listeriosis therapy (i.e., ampicillin, gentamicin, rifampicin, chloramphenicol, enrofloxacin, vancomycin, trimethoprim-sulfamethoxazole, erythromycin, and tetracycline). The influence of species and serotype on the growth kinetics (modified Gompertz equation) and on the adhesion ability (crystal violet staining) of nine isolates of L. monocytogenes (serotypes 1/2a, 1/2b, 1/2c, 3a, 3b, 3c, 4a, 4b, and 4d), and one strain of Listeria ivanovii were investigated. The maximum growth rate (ΔOD420-580/h) varied between 0.073 ± 0.018 (L. monocytogenes 1/2a) and 0.396 ± 0.026 (L. monocytogenes 4b). The isolates of L. monocytogenes belonging to serotypes 3a and 4a, as well as L. ivanovii, showed a greater (p < 0.05) biofilm-forming ability than did the remaining strains, including those that belong to the serotypes commonly implied in human listeriosis (1/2a, 1/2b, 1/2c and 4b). The need for training in good hygiene practices during the handling of meat and poultry is highlighted to reduce the risk of human listeriosis.

PHYSIOLOGICAL CHARACTERIZATION OF ADAPTIVE CLONES IN EVOLVING POPULATIONS OF THE YEAST, SACCHAROMYCES CEREVISIAE

Genetics ◽  
1985 ◽  
Vol 110 (2) ◽  
pp. 173-185
Author(s):  
Julian Adams ◽  
Charlotte Paquin ◽  
Paul W Oeller ◽  
Lester W Lee
Keyword(s):  
Glucose Uptake ◽  
Continuous Culture ◽  
Growth Parameters ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Yeast Saccharomyces Cerevisiae ◽  
Adaptive Mutations ◽  
Physiological Characterization ◽  
Evolving Populations

ABSTRACT Populations of a diploid strain of S. cerevisiae were grown in glucose-limited continuous culture for more than 260 generations. A series of seven sequential adaptive changes were identified by monitoring the frequency of cycloheximide resistance in these populations. Samples were taken from the continuous cultures following each adaptive shift and characterized physiologically to determine (1) the range of phenotypes that can be selected in a precisely defined constant environment and (2) the order and predictability of the occurrence of the adaptive mutations in evolving populations. The clones were characterized with respect to the growth parameters, maximum growth rate, saturation coefficient and yield, as well as for changes in cell size and geometry and rate of glucose uptake. The maximum growth rates of the seven adaptive clones were very similar, but in contrast the saturation coefficients differed substantially. Surprisingly, not all clones showed reductions in the saturation coefficients, in comparison to the immediately preceding clones, as would be predicted from classical continuous culture kinetics. In addition, yield estimates first increased and then decreased for later isolated adaptive clones. In general, the results suggest epistatic interactions between the adaptive clones, consistent with earlier published results. The rate of glucose uptake, as measured by 14Cxylose uptake, increased dramatically after the selection and fixation of seven adaptive clones. Progressive decreases in cell volume and changes in cell geometry, resulting in increased surface area to volume ratios, were also observed in the adaptive clones, but these changes were not always seen in other haploid and diploid yeast populations evolving under the same conditions. Such changes may be easily explainable in terms of the characteristics of the glucose-limited environment. The significance of the results to the evolution of microorganisms under nutrient-limiting conditions is discussed.

scholarly journals Editorial for Special Issue “Historical Mineral Pigments”

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 237
Author(s):  
Carolina Cardell ◽  
Jose Santiago Pozo-Antonio
Keyword(s):  
Chemical Characterization ◽  
Glass Enamel ◽  
Special Issue ◽  
High Quality ◽  
Physical Chemical ◽  
Scientific Disciplines ◽  
Natural And Synthetic

The physical–chemical characterization of natural and synthetic historical inorganic and mineral pigments, which may be found embedded in paintings (real or mock-ups), glass, enamel, ceramics, beads, tesserae, etc., as well as their alteration under different decay scenarios, is a demanding line of investigation. This field of research is now both well established and dynamic, as revealed by the numerous publications in high-quality journals of varied scientific disciplines. [...]

scholarly journals Optimizing of Microalgae Scenedesmus sp. Biomass Production in Wet Market Wastewater Using Response Surface Methodology

2021 ◽  
Vol 13 (4) ◽  
pp. 2216
Author(s):  
Najeeha Mohd Apandi ◽  
Mimi Suliza Muhamad ◽  
Radin Maya Saphira Radin Mohamed ◽  
Norshuhaila Mohamed Sunar ◽  
Adel Al-Gheethi ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Biomass Yield ◽  
Biomass Productivity ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Aeration Rate ◽  
Composition Analysis ◽  
Wet Market ◽  
Central Composite

The present study aimed to optimize the production of Scenedesmus sp. biomass during the phycoremediation process. The biomass productivity was optimized using face centred central composite design (FCCCD) in response surface methodology (RSM) as a function of two independent variables that included wet market wastewater concentrations (A) with a range of 10% to 75% and aeration rate (B) with a range of 0.02 to 4.0 L/min. The results revealed that the highest biomass productivity (73 mg/L/d) and maximum growth rate (1.19 day−1) was achieved with the 64.26% of (A) and 3.08 L/min of (B). The GC-MS composition analysis of the biomass yield extract revealed that the major compounds are hexadecane (25%), glaucine (16.2%), and phytol (8.33%). The presence of these compounds suggests that WMW has the potential to be used as a production medium for Scenedesmus sp. Biomass, which has several applications in the pharmaceutical and chemical industry.

Growth and Characterization of High Quality Epitaxial GaN on ZnO(0001) by Reactive Molecular Epitaxy

1998 ◽  
Vol 264-268 ◽  
pp. 1201-1204
Author(s):  
F. Hamdani ◽  
M. Yeadon ◽  
David John Smith ◽  
H. Tang ◽  
W. Kim ◽  
...  
Keyword(s):  
High Quality

A note on growth curves of rabbit lines selected on growth rate or litter size

1993 ◽  
Vol 57 (2) ◽  
pp. 332-334 ◽  
Author(s):  
A. Blasco ◽  
E. Gómez
Keyword(s):  
Growth Rate ◽  
Litter Size ◽  
Growth Curves ◽  
Live Weight ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Standard Errors ◽  
Adult Weight ◽  
Weight Growth ◽  
Using Data

Two synthetic lines of rabbits were used in the experiment. Line V, selected on litter size, and line R, selected on growth rate. Ninety-six animals were randomly collected from 48 litters, taking a male and a female each time. Richards and Gompertz growth curves were fitted. Sexual dimorphism appeared in the line V but not in the R. Values for b and k were similar in all curves. Maximum growth rate took place in weeks 7 to 8. A break due to weaning could be observed in weeks 4 to 5. Although there is a remarkable similarity of the values of all the parameters using data from the first 20 weeks only, the higher standard errors on adult weight would make 30 weeks the preferable time to take data for live-weight growth curves.

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