scholarly journals Determinación de la producción de jalea real en colmenas de recría de diferentes dimensiones

2007 ◽  
Vol 8 (1) ◽  
pp. 75
Author(s):  
Hugo Humberto Ballesteros ◽  
Rodrigo Efrén Vásquez
Keyword(s):  
Minimum Temperature ◽  
Royal Jelly ◽  
The Other ◽  
Optimal Temperature ◽  
Internal Temperature ◽  
Tropical Ecosystem ◽  
Average Production ◽  
Optimal Temperature Range ◽  
Different Dimensions

<p>Se valoró la producción de jalea real en un apiario localizado en un ecosistema de trópico alto. A tal fin, se evaluaron cuatro tratamientos representados en colmenas de recría de diez, ocho y seis cuadros, cada uno con tres repeticiones; se estimó el porcentaje de aceptación y la cantidad de jalea real por cúpula. En las colmenas de recría de seis cuadros la temperatura interna fue más constante que en los demás tratamientos (mínima 30°C y máxima 38°C); así mismo, presentó un rango de temperatura óptima entre 34 y 35°C, factor de gran importancia ya que este tipo de colmena de recría produjo la mayor cantidad de jalea real por transferencia (15.973 mg) con una aceptación de cúpulas del 86,3% y una producción promedio por cúpula aceptada de 308,5 mg. Las colmenas de recría de ocho cuadros presentaron una temperatura mínima de 26°C y una máxima de 36°C, con una producción de 7.976 mg por transferencia, una aceptación del 72% y una producción promedio por cúpula aceptada de 185,3 mg. Las colmenas de recría de diez cuadros presentaron una temperatura mínima de 22°C y una máxima de 34°C, una producción de 6.364 mg por transferencia, una aceptación del 51% y una producción promedio por cúpula aceptada de 208 mg.</p><p> </p><p><strong>Determination of royal jelly production in rearing hives of different dimensions</strong></p><p>The production of royal jelly in an apiary located in a high tropical ecosystem was evaluated. To that end, four treatments were evaluated represented in rearing hives of ten, eight and six compartments, each with three repetitions; the percentage of filled cupules and the quantity of royal jelly per cupule for each group was determined. In the rearing hives with six compartments the internal temperature was more constant than in the other treatments (minimum 30°C and maximum 38°C); it also showed an optimal temperature range of 34-35ºC, a factor of great importance since this kind of rearing hive produced the largest amount of royal jelly per transfer (15,973 mg) with 86.3% of filled cupules and an average production of 308.5 mg per filled cupule. The rearing hives with eight compartments showed a minimum temperature of 26°C and maximum of 36°C, with a production of 7,976 mg per transfer, 72% filled cupules and an average production of 185.3 mg per filled cupule. The rearing hives of ten compartments showed a minimum temperature of 22°C and a maximum of 34°C, with a production of 6,364 mg per transfer, 51% filled cupules and an average production of 208 mg per filled cupule.</p>

scholarly journals Comparative analysis of riboflavin and thiamine in raw and commercial honey

2020 ◽  
Vol 38 (No. 3) ◽  
pp. 179-184
Author(s):  
Slavica Sunarić ◽  
Jelena Živković ◽  
Ana Spasić ◽  
Jelena Lalić ◽  
Jelena Matejić
Keyword(s):  
Comparative Analysis ◽  
Royal Jelly ◽  
B Vitamins ◽  
The Other ◽  
Commercial Products ◽  
Other Hand ◽  
Thiamine Content

The paper describes the determination of riboflavin and thiamine in the best-selling types of 13 raw and 8 commercial monofloral and multifloral honeys originating from Serbia. It was found that there is a difference in average riboflavin and thiamine content between raw and commercial honey, as well as between different honey floral varieties. The results showed that forest, meadow and oregano honey had a significantly higher content of both B vitamins compared to acacia, linden and lavender honey. On the other hand, a very low content of riboflavin and thiamine was found in honeydew honey. Among the commercial products, royal jelly was the richest in thiamine and riboflavin, followed by forest honey. In general, the quality of all of the commercial honey samples regarding these vitamins was lower than that of the raw domestic honeys.

scholarly journals DETERMINATION OF THE OPTIMAL TEMPERATURE RANGE FOR PRE-FIRING KAOLIN

2020 ◽  
pp. 85-87
Author(s):  
TATIANA YURIEVNA ERANSKAYA ◽  
Keyword(s):  
Nitric Acid ◽  
Aluminum Hydroxide ◽  
Acid Leaching ◽  
Optimal Temperature ◽  
Temperature Range ◽  
Nitric Acid Leaching ◽  
Optimal Temperature Range ◽  
Maximum Opening

The effect of pre-firing of kaolin concentrates on the yield of aluminum hydroxide during nitric acid leaching by cavitation method is studied. The firing interval of 700-750 ° C is optimal for maximum opening of kaolin concentrate.

Growth of Aerobic Psychrotrophs and Color Changes of Precooked Beef Slices as Affected by Packaging Procedure1

1987 ◽  
Vol 50 (9) ◽  
pp. 733-736 ◽  
Author(s):  
T. P. CARR ◽  
J. A. MARCHELLO
Keyword(s):  
Shelf Life ◽  
Microbial Growth ◽  
The Other ◽  
Lag Phase ◽  
Oxygen Level ◽  
Internal Temperature ◽  
Color Intensity ◽  
Color Changes ◽  
Beef Color

Precooked beef slices from top round roasts were used in replicate trials to determine the effects of packaging treatment upon shelf-life characteristics (microbial growth and color attributes) during retail storage. Roasts were dry-roasted to an internal temperature of 60°C, cooled for 1 h, then sliced (3–4 mm). Slices were packaged in: (a) vacuum; (b) 15% CO2, 40% O2, 45% N2; (c) 15% CO2, 20% O2, 65% N2; or (d) 15% CO2, 10% O2, 75% N2 and held at 4°C for up to 18 d. Enumeration of microorganisms and determination of color attributes were done at 0, 3, 6, 9, 12, 15, and 18 d of storage. Psychrotrophic counts were higher (P&lt;.05) on slices stored 9–18 d in atmospheres containing ambient (20%) oxygen level as compared to the other packaging treatments. Vacuum packaging exhibited a greater lag phase for psychrotrophs. Vacuum packaged slices maintained a superior cooked beef color for 18 d and had greater (P&lt;.05) chroma readings, indicating a greater color intensity.

Determination of the lattice translation across {110} APBs in GaAs

1988 ◽  
Vol 46 ◽  
pp. 600-601
Author(s):  
D.R. Rasmussen ◽  
N.-H. Cho ◽  
C.B. Carter
Keyword(s):  
Grain Boundaries ◽  
Lower Energy ◽  
Antiphase Boundary ◽  
The Other ◽  
Boundary Structure ◽  
Interface Plane ◽  
Inversion Symmetry ◽  
High Angle ◽  
Equilibrium Distance

Domains in GaAs can exist which are related to one another by the inversion symmetry, i.e., the sites of gallium and arsenic in one domain are interchanged in the other domain. The boundary between these two different domains is known as an antiphase boundary [1], In the terminology used to describe grain boundaries, the grains on either side of this boundary can be regarded as being Σ=1-related. For the {110} interface plane, in particular, there are equal numbers of GaGa and As-As anti-site bonds across the interface. The equilibrium distance between two atoms of the same kind crossing the boundary is expected to be different from the length of normal GaAs bonds in the bulk. Therefore, the relative position of each grain on either side of an APB may be translated such that the boundary can have a lower energy situation. This translation does not affect the perfect Σ=1 coincidence site relationship. Such a lattice translation is expected for all high-angle grain boundaries as a way of relaxation of the boundary structure.

Determination of the Burgers vector of a dislocation in a Fe-Mn alloy by weak-beam image in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 330-331
Author(s):  
Y. Ishida ◽  
H. Ishida ◽  
K. Kohra ◽  
H. Ichinose
Keyword(s):  
High Order ◽  
Simulation Technique ◽  
The Other ◽  
Image Simulation ◽  
Diffraction Vector ◽  
Burgers Vector ◽  
Weak Beam ◽  
Beam Image ◽  
Edge Component

IntroductionA simple and accurate technique to determine the Burgers vector of a dislocation has become feasible with the advent of HVEM. The conventional image vanishing technique(1) using Bragg conditions with the diffraction vector perpendicular to the Burgers vector suffers from various drawbacks; The dislocation image appears even when the g.b = 0 criterion is satisfied, if the edge component of the dislocation is large. On the other hand, the image disappears for certain high order diffractions even when g.b ≠ 0. Furthermore, the determination of the magnitude of the Burgers vector is not easy with the criterion. Recent image simulation technique is free from the ambiguities but require too many parameters for the computation. The weak-beam “fringe counting” technique investigated in the present study is immune from the problems. Even the magnitude of the Burgers vector is determined from the number of the terminating thickness fringes at the exit of the dislocation in wedge shaped foil surfaces.

Procedures for the Quantitative Determination of Autoprothrombin C

1962 ◽  
Vol 08 (03) ◽  
pp. 434-441 ◽  
Author(s):  
Edmond R Cole ◽  
Ewa Marciniak ◽  
Walter H Seegers
Keyword(s):  
Quantitative Determination ◽  
Plasma Sample ◽  
Quantitative Measure ◽  
The Other ◽  
Clotting Time ◽  
Bovine Plasma ◽  
Autoprothrombin C

SummaryTwo quantitative procedures for autoprothrombin C are described. In one of these purified prothrombin is used as a substrate, and the activity of autoprothrombin C can be measured even if thrombin is in the preparation. In this procedure a reaction mixture is used wherein the thrombin titer which develops in 20 minutes is proportional to the autoprothrombin C in the reaction mixture. A unit is defined as the amount which will generate 70 units of thrombin in the standardized reaction mixture. In the other method thrombin interferes with the result, because a standard bovine plasma sample is recalcified and the clotting time is noted. Autoprothrombin C shortens the clotting time, and the extent of this is a quantitative measure of autoprothrombin C activity.

Determination of Factor XIII Activity and of Factor XIII Inhibitors Using an Ammonium-Sensitive Electrode

1983 ◽  
Vol 50 (02) ◽  
pp. 563-566 ◽  
Author(s):  
P Hellstern ◽  
K Schilz ◽  
G von Blohn ◽  
E Wenzel
Keyword(s):  
Factor Xiii ◽  
Normal Subjects ◽  
The Other ◽  
Activity Measurement ◽  
Factor Xiii Deficiency ◽  
Assay Procedure ◽  
Stabilization Factor ◽  
Release Method ◽  
Sensitive Electrode

SummaryAn assay for rapid factor XIII activity measurement has been developed based on the determination of the ammonium released during fibrin stabilization. Factor XIII was activated by thrombin and calcium. Ammonium was measured by an ammonium-sensitive electrode. It was demonstrated that the assay procedure yields accurate and precise results and that factor XIII-catalyzed fibrin stabilization can be measured kinetically. The amount of ammonium released during the first 90 min of fibrin stabilization was found to be 7.8 ± 0.5 moles per mole fibrinogen, which is in agreement with the findings of other authors. In 15 normal subjects and in 15 patients suffering from diseases with suspected factor XIII deficiency there was a satisfactory correlation between the results obtained by the “ammonium-release-method”, Bohn’s method, and the immunological assay (r1 = 0.65; r2= 0.70; p<0.01). In 3 of 5 patients with paraproteinemias the values of factor XIII activity determined by the ammonium-release method were markedly lower than those estimated by the other methods. It could be shown that inhibitor mechanisms were responsible for these discrepancies.

Determination of the Number of Conserved Chromosomal Segments Between Species

Genetics ◽  
2001 ◽  
Vol 157 (3) ◽  
pp. 1387-1395 ◽  
Author(s):  
Sudhir Kumar ◽  
Sudhindra R Gadagkar ◽  
Alan Filipski ◽  
Xun Gu
Keyword(s):  
Statistical Approach ◽  
Common Ancestor ◽  
Chromosomal Rearrangements ◽  
Structural Similarity ◽  
The Other ◽  
Segment Length ◽  
Human Genomes ◽  
Genomic Divergence ◽  
Human And Mouse

AbstractGenomic divergence between species can be quantified in terms of the number of chromosomal rearrangements that have occurred in the respective genomes following their divergence from a common ancestor. These rearrangements disrupt the structural similarity between genomes, with each rearrangement producing additional, albeit shorter, conserved segments. Here we propose a simple statistical approach on the basis of the distribution of the number of markers in contiguous sets of autosomal markers (CSAMs) to estimate the number of conserved segments. CSAM identification requires information on the relative locations of orthologous markers in one genome and only the chromosome number on which each marker resides in the other genome. We propose a simple mathematical model that can account for the effect of the nonuniformity of the breakpoints and markers on the observed distribution of the number of markers in different conserved segments. Computer simulations show that the number of CSAMs increases linearly with the number of chromosomal rearrangements under a variety of conditions. Using the CSAM approach, the estimate of the number of conserved segments between human and mouse genomes is 529 ± 84, with a mean conserved segment length of 2.8 cM. This length is &lt;40% of that currently accepted for human and mouse genomes. This means that the mouse and human genomes have diverged at a rate of ∼1.15 rearrangements per million years. By contrast, mouse and rat are diverging at a rate of only ∼0.74 rearrangements per million years.

scholarly journals A thermo-mechanical machining method for improving the accuracy and stability of the geometric shape of long low-rigidity shafts

2021 ◽  
Author(s):  
Antoni Świć ◽  
Arkadiusz Gola ◽  
Łukasz Sobaszek ◽  
Natalia Šmidová
Keyword(s):  
Heat Treatment ◽  
Cross Section ◽  
Mechanical Treatment ◽  
Geometric Shape ◽  
Different Dimensions ◽  
Thermo Mechanical Treatment ◽  
Mechanical Machining ◽  
Simultaneous Heat ◽  
Accuracy And Stability

AbstractThe article presents a new thermo-mechanical machining method for the manufacture of long low-rigidity shafts which combines straightening and heat treatment operations. A fixture for thermo-mechanical treatment of long low-rigidity shafts was designed and used in tests which involved axial straightening of shafts combined with a quenching operation (performed to increase the corrosion resistance of the steel used as stock material). The study showed that an analysis of the initial deflections of semi-finished shafts of different dimensions and determination of the maximum corrective deflection in the device could be used as a basis for performing axial straightening of shaft workpieces with simultaneous heat treatment and correction of the initial deflection of the workpiece. The deflection is corrected by stretching the fibers of the stock material, at any cross-section of the shaft, up to the yield point and generating residual stresses symmetrical to the axis of the workpiece. These processes allow to increase the accuracy and stability of the geometric shape of the shaft.

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