scholarly journals COMPARISON OF CHARACTERIZATION OF FIGHTING ROOSTER (Gallus gallus) SEMEN EJACULATES RECOVERED BY ELECTROEJACULATION AND DORSAL MASSAGE TECHNIQUES

SPERMOVA ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 32-38
Author(s):  
Andres Moscoso Piedra ◽  
◽  
Marco Muñoz ◽  
Daniel Argudo Garzon ◽  
Jorge Samaniego ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Gallus Gallus ◽  
Quality Parameters ◽  
Sperm Viability ◽  
Lower Response ◽  
Semen Collection ◽  
Straight Line ◽  
A Priority

Implementing alternatives methods to dorsal massage (e.g., electroejaculation) for recovering semen from fighting rooster, known to be very stressful due to its aggressiveness, has become a priority for breeders of this cock breed in Ecuador. Therefore, the objective of the present study was to evaluate two semen collection techniques in fighting roosters, one by electroejaculation (EE) and another by dorsal massage (DM) on seminal quality parameters. For this purpose, thirty attempts of semen recovery from six adult Spanish fighting roosters were carried out using DM (n = 12) and EE (n = 18). Electroejaculation was performed previous sedation, applying five stimulation cycles (of 2 s) generated from a handmade electroejaculation probe (9 to 12 V). The results showed that the EE produced lower response (P < 0.01) to semen ejaculation than the DM (44.4 % vs. 100.0 %, respectively). However, semen samples obtained by EE had better (P < 0.05) spermatic kinetic with greater values of straight-line velocity (VSL, µm/s), average path velocity (VAP, µm/s), and beat-cross frequency (BCF, Hz) as well as higher percentages (P < 0.01) of wobble and linearity compared to DM, irrespective of sperm viability. In addition, the number of urates present in the ejaculates obtained by EE was lower (P < 0.05) than those obtained by DM. In conclusion, electrical stimulation with prior sedation produced a low semen ejaculation response in fighting cocks. However, EE yielded semen ejaculates with better spermatic kinetic compared with the conventional dorsal massage technique.

scholarly journals Characterization of Alkanolamine Blends for Carbon Dioxide Absorption. Corrosion and Regeneration Studies

2021 ◽  
Vol 13 (7) ◽  
pp. 4011
Author(s):  
Alfredo Sánchez-Bautista ◽  
Ester M. Palmero ◽  
Alberto J. Moya ◽  
Diego Gómez-Díaz ◽  
M. Dolores La Rubia
Keyword(s):  
Carbon Dioxide ◽  
Surface Tension ◽  
Energy Consumption ◽  
Absorption Rate ◽  
Carbon Dioxide Capture ◽  
Regeneration Capacity ◽  
Carbon Dioxide Absorption ◽  
Research Programs ◽  
A Priority

There are a lot of research programs focusing on the development of new solvents for carbon dioxide capture. The most important priority should be reducing the energy consumption needed at the regeneration step, but minimizing solvent degradation and its corrosivity is also considered as a priority. In this research, the aqueous blends of 2-amino-2-methyl-1-propanol (AMP: 1 kmol·m−3) and 1-amino-2-propanol (MIPA: 0.1–0.5 kmol·m−3) are characterized in terms of density, viscosity, and surface tension. The carbon dioxide absorption rate and capacity, the regeneration capacity, and the corrosivity of these solvents are also evaluated.

scholarly journals Production Process Effect on Mexican Agave Syrups Quality: A Preliminary Study

2018 ◽  
Vol 7 (3) ◽  
pp. 50
Author(s):  
Blanca I. Maldonado-Guevara ◽  
Sandra T. Martín del Campo ◽  
Anaberta Cardador-Martínez
Keyword(s):  
Production Process ◽  
Industrial Process ◽  
Quality Parameters ◽  
Thermal Hydrolysis ◽  
Process Variables ◽  
Anova Analysis ◽  
Hydroxymethyl Furfural ◽  
Wide Range ◽  
Preliminary Study

In this work, the quality parameters of commercial agave syrups produced in five different Mexican states and with different production process were evaluated. Regulated parameters (pH, Moisture, Ashes, and 5-(hydroxymethyl) furfural), as well as color and aw, were measured on 25 agave syrups, including traditional samples as controls. Traditional and semi-industrial syrups were samples obtained by thermal hydrolysis. Additionally, the semi-industrial process included control of process variables such as pH, °Bx, and temperature. The industrial process is technified. The agave syrups ranged from 70-76 °Bx, pH ranged from 3.2-6.7, and moisture from 20.2-28.6%. The aw values shown a wide variation as well as L* a* and b* color parameters. Some of those parameters shown significant differences in ANOVA analysis; however, most of the samples complied with the norm. General Discriminant Analysis (GDA) made it possible to discriminate between production process by using pH, % Ash, b*, 5-(hydroxymethyl)furfural and a* parameters. Further analysis of a wide range of syrups and the inclusion of non-regulated compounds such as volatile compounds and carbohydrates are needed to get more information for a deeper characterization of agave syrups. 

scholarly journals A New Method for the Extraction of Diode Parameters Using a Single Exponential Model

2000 ◽  
Vol 22 (3) ◽  
pp. 157-163 ◽  
Author(s):  
S. Dib ◽  
M. De La Bardonnie ◽  
A. Khoury ◽  
F. Pelanchon ◽  
P. Mialhe
Keyword(s):  
Least Squares Method ◽  
Exponential Model ◽  
New Method ◽  
Ordinate Axis ◽  
Straight Line ◽  
Current Voltage ◽  
Method Approach ◽  
Single Exponential

A new method for extracting junction parameters of the single diode model is presented. A least squares method approach considers the deviation ∆V=f(I) between the experimental current-voltage (I-V) characteristic and a theoretical arbitrary characteristic. A specific case- the ∆V graph reducing to a straight line–is identified and the knowledge of the slope and of the intercept with the ordinate axis leads to the determination of the junction parameters. The method is applied to the characterization of the emitter-base junction of transistors and the results are discussed.

scholarly journals Wheat and flour quality relations in a commercial mill

2013 ◽  
Vol 19 (No. 5) ◽  
pp. 189-195 ◽  
Author(s):  
M. Hrušková ◽  
K. Hanzlíková ◽  
P. Varáček
Keyword(s):  
Protein Content ◽  
Quality Parameters ◽  
Ash Content ◽  
Activity Measurement ◽  
Western Region ◽  
Falling Number ◽  
Bread Making ◽  
Gluten Index

The bread-making quality of forty commercial winter wheat samples, grown in the western region of the CzechRepublic, and their flours (white flours with ash content of about 0.5%) prepared in a commercial mill was studied. Standard analytical methods (ash and protein content, wet gluten), amylolytic activity measurement (falling number), rheological investigation (alveograph, gluten index), sedimentation test and laboratory baking test were used for characterization of wheats and flours. In addition NIR method was used to calculate ash, wet gluten, sedimentation value and protein content. Statistically significant correlations were found practically between all tested quality parameters of wheat and corresponding flour samples. However, the strongest correlation (r = 0.69&ndash;0.70) significant at 0.01 level exists between specific bread volume and protein and wet gluten content, determined both by standard or by NIR methods.&nbsp;

Characterization of Italian multifloral honeys on the basis of their mineral content and some typical quality parameters

2018 ◽  
Vol 74 ◽  
pp. 102-113 ◽  
Author(s):  
Marcelo Enrique Conti ◽  
Silvia Canepari ◽  
Maria Grazia Finoia ◽  
Giustino Mele ◽  
Maria Luisa Astolfi
Keyword(s):  
Mineral Content ◽  
Quality Parameters

CHARACTERIZATION OF THE FUNCTIONAL ADHESION PROPERTY OF THE MONOCYTE FIBRINOGEN RECEPTOR WITH A MONOCLONAL ANTIBODY (Mab) DIRECTED TO THE ACTIVATED STATE OF THE PLATELET GLYCOPROTEIN (GP) IIb/IIIa

1987 ◽  
Author(s):  
Dario C Altieri ◽  
Rossella Bader ◽  
Pier M Mannucci
Keyword(s):  
Surface Antigen ◽  
Platelet Glycoprotein ◽  
Blood Monocytes ◽  
Adhesion Properties ◽  
Fibrinogen Receptor ◽  
Plot Analysis ◽  
Straight Line ◽  
Platelet Receptor ◽  
Activated State

We recently showed that human blood monocytes bind fibrinogen through a genuine surface antigen only in part similar to the platelet GP Ilb/IIIa. Moreover, some anti-GP IIb/IIIa Mabs cross-react with monocytes. In this study we used the 7E3 Mab which preferentially binds to the activated conformation of the platelet GP IIb/IIIa to characterize the dynamic mechanism of "exposure" of the monocyte fibrinogen receptor. 7E3 Mab (25 μg/ml) completely suppressed the binding of i25I-fibrinogen to ADP (10μM)-stimulated monocytes. However, differently from the platelet GP IIb/IIIa, 125I-7E3 binding to unstimulated monocytes was a non-specific and non-saturable reaction. In contrast, after stimulation with ADP (10 μM), suspensions of human monocytes bound 125I-7E3 with saturation of 25-30 μg/ml of added Mab. Scatchard plot analysis was a single-affinity straight line revealing 97,400 binding sites/monocyte with a dissociation constant of 5.2×10−8 M. The monocyte surface antigen uniquely expressed after ADP-activation recognized by 7E3 was visualized by immunoprecipitation studies. Surface iodinated platelet lysate subjected to immunoprecipitation with 7E3 revealed a single band with molecular weight (Mr) of 116,000 corresponding to the platelet GP IIb/IIIa. In contrast, monocytes showed a dimeric surface antigen precipitated by 7E3 in two subunits with Mr=l55,000 and 95,000 respectively. These data indicate that the adhesion properties of the monocyte fibrinogen receptor defined by an anti-platelet GP IIb/IIIa cross-reacting Mab are structurally and functionally distinct from those of the platelet receptor.

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