scholarly journals Electromyogram of the Cibarial Pump and the Feeding Process in Hematophagous Hemiptera

10.5772/10647 ◽  
2011 ◽  
Author(s):  
Ricardo N ◽  
Nelder F ◽  
Alessandra A ◽  
Alberto F ◽  
Adriana C ◽  
...  
Keyword(s):  
Feeding Process

Histopathological and morphological alterations in salivary gland of House fly induced by oral administration Thiamethoxam.

2018 ◽  
Vol 3 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Karim Mohammed Xider
Keyword(s):  
Salivary Gland ◽  
Cell Membrane ◽  
Oral Administration ◽  
Peak Concentration ◽  
Active Component ◽  
House Fly ◽  
Morphological Alterations ◽  
Gland Tissue ◽  
Gland Duct ◽  
Feeding Process

The current work the effect of Actara insecticide belongs to chemical family Neonicotinoid. The active component of thiamethoxam in three concentrations: 0.750 ppm, 1.5 ppm and 2.25ppm   on adult house fly salivary glands. Histopathological and morphological effects revealed important alterations produced by this insecticide in histological and morphology of the adult house fly gland tissue categorized by increasing gland duct lumen diameter. These alterations are possibly related with excretion function of salivary gland might be accountable for removing this insecticide. Results show thiamethoxam is a powerful insecticide that performances histologically in salivary glant tissue, triggering alterations in the glands  form, cytoplasm  with extreme vacuolation ,disruption cell membrane, obvious disorganization tissues cells, terminating in progressive deteriorating phase with changes in nucleus glandular cell's, such alterations occurred together in its size and form of gland, disintegration of nucleus, and presence of apoptosis(fragmentation) nucleus, accelerating the process of glandular degeneration ,and interfering with feeding process of house fly particularly when the peak concentration of  insecticide  was used.

Ecological and isotopic discrimination of syntopic rodents in a neotropical rain forest of French Guiana

2003 ◽  
Vol 19 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Jean-François Mauffrey ◽  
François Catzeflis
Keyword(s):  
Stable Isotopes ◽  
Isotopic Composition ◽  
Rain Forest ◽  
French Guiana ◽  
Ecological Studies ◽  
Carbon Isotope Ratios ◽  
Photosynthetic Pathways ◽  
Feeding Process ◽  
Neotropical Rain Forest

Stable isotopes are commonly used in ecological studies to infer food resources (Ambrose & DeNiro 1986, Bocherens et al. 1990,1991,1994;Yoshinaga et al. 1991) since isotopic composition is conserved during the feeding process. Moreover,for herbivorous (sensu lato) species, it is often possible to identify the main resource because different photosynthetic pathways generate different values of carbon isotope ratios (Park & Epstein 1961, Sternberg et al. 1984). This allows the characterization of broad biota such as savannas or forest and discrimination of grazers from sympatric folivorous species (DeNiro & Epstein 1978).

scholarly journals Robust optimal control of a nonlinear impulsive time-delay system for 1,3-PD fed-batch culture

2021 ◽  
Vol 2113 (1) ◽  
pp. 012022
Author(s):  
Chao Sun
Keyword(s):  
Optimal Control ◽  
Time Delay ◽  
Control Variable ◽  
Optimization Method ◽  
Delay System ◽  
Experimental Result ◽  
Time Delay System ◽  
Robust Optimal Control ◽  
Robust Model ◽  
Feeding Process

Abstract In this paper, taking the feeding process as a form of impulsive and considering the time-delay in fermentation process. A robust model with the time-delay system as the control variable and the time-delay system as the constraint is established. In order to solve this optimal control problem, we have propose an particle swarm optimization method to solve problem. Numerical results show that 1,3-PD yield at the terminal time increases compared with the experimental result.

Fluid transmission and filtration efficiency of the labral fans of black fly larvae (Diptera: Simuliidae): hydrodynamic, morphological, and behavioural aspects

1993 ◽  
Vol 71 (1) ◽  
pp. 148-162 ◽  
Author(s):  
Jean O. Lacoursière ◽  
Douglas A. Craig
Keyword(s):  
Filtration Efficiency ◽  
Suspension Feeding ◽  
Optimal Filtering ◽  
Feedback Process ◽  
Simulium Vittatum ◽  
Active Feedback ◽  
Flow Through ◽  
Feeding Process ◽  
Behavioural Aspects ◽  
Feeding Behaviours

Body stance and water flow through the labral fans of suspension-feeding Simulium vittatum Zetterstedt larvae were examined using dead and live larvae. Transmission of flowing water through the fans was determined by means of dye injections. Feeding stance is the outcome of an active feedback process between flow forces and behavioural reactions that maintains the fans in an optimal filtering position. Fans responded to velocity increases through structural reconfiguration, which resulted in an increase in aperture size. As the velocity decreased, an increased fraction of the water directly approaching the fan aperture flowed around its perimeter, with no flow through the fans below 2.5 cm∙s−1. Fluid transmission never exceeded 30–35%, even at velocities up to 50 cm∙s−1. Calculations of suspension-feeding efficiency are reformulated to reflect labral fan transmission and behavioural components of the feeding process. Simulium vittatum larvae are consequently shown to be 4–26 times more efficient in filter feeding than has been previously assessed. The effect of flow on labral fan transmission is discussed in relation to known habitat choices and feeding behaviours of simuliid larvae.

Dynamics of a Vibratory Feeder

1997 ◽  
Author(s):  
Peter Wolfsteiner ◽  
Friedrich Pfeiffer
Keyword(s):  
Coulomb Friction ◽  
Three Dimensional ◽  
Automatic Assembly ◽  
Trial And Error ◽  
Unilateral Constraints ◽  
Multiple Impacts ◽  
Three Dimensional Model ◽  
Transportation Process ◽  
Feeding Process ◽  
Small Parts

Abstract The most common devices used to feed small parts in an automatic assembly framework are vibratory feeders. They are used to store, feed, orientate and isolate the parts. Due to the complex mechanics of the feeding process the design of the feeders is still depending on trial and error. This paper presents a complete dynamical model of the transportation process including unilateral constraints and multiple impacts, both with coulomb friction. Some simulation results, computed with a three dimensional model, explain the practical benefit of the proposed tool.

Human Upper Limb Experimental Analysis for Assistive Devices in Feeding Process

2021 ◽  
Vol 42 ◽  
pp. 122-127
Author(s):  
Cristian Copilusi ◽  
Ionut Geonea ◽  
Alexandru Margine ◽  
Adrian Rosca
Keyword(s):  
Upper Limb ◽  
Experimental Analysis ◽  
Command And Control ◽  
Disabled Persons ◽  
Assistive Devices ◽  
Upper Arm ◽  
Experimental Process ◽  
Feeding Process ◽  
And Control ◽  
Human Upper Limb

This research addresses attention to human upper limb experimental analysis during feeding process aiding disabled persons. The research core is focused on the experimental process of obtaining the angular amplitudes and trajectories developed by the human upper arm during feeding process. The research originality consists on the obtained results which can be used in further researches for command and control of robotic assisting devices.

Evaluation of Delivery of Enteral Nutrition in Critically Ill Patients Receiving Mechanical Ventilation

2008 ◽  
Vol 17 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Debra O’Meara ◽  
Eduardo Mireles-Cabodevila ◽  
Fran Frame ◽  
A. Christine Hummell ◽  
Jeffrey Hammel ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Enteral Nutrition ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Feeding Tube ◽  
Feeding Tubes ◽  
Academic Center ◽  
Specific Step ◽  
Feeding Process ◽  
Medical Intensive Care

Background Published reports consistently describe incomplete delivery of prescribed enteral nutrition. Which specific step in the process delays or interferes with the administration of a full dose of nutrients is unclear. Objectives To assess factors associated with interruptions in enteral nutrition in critically ill patients receiving mechanical ventilation. Methods An observational prospective study of 59 consecutive patients who required mechanical ventilation and were receiving enteral nutrition was done in an 18-bed medical intensive care unit of an academic center. Data were collected prospectively on standardized forms. Steps involved in the feeding process from admission to discharge were recorded, each step was timed, and delivery of nutrition was quantified. Results Patients received approximately 50% (mean, 1106.3; SD, 885.9 Cal) of the prescribed caloric needs. Enteral nutrition was interrupted 27.3% of the available time. A mean of 1.13 interruptions occurred per patient per day; enteral nutrition was interrupted a mean of 6 (SD, 0.9) hours per patient each day. Prolonged interruptions were mainly associated with problems related to small-bore feeding tubes (25.5%), increased residual volumes (13.3%), weaning (11.7%), and other reasons (22.8%). Placement and confirmation of placement of the small-bore feeding tube were significant causes of incomplete delivery of nutrients on the day of admission. Conclusions Delivery of enteral nutrition in critically ill patients receiving mechanical ventilation is interrupted by practices embedded in the care of these patients. Evaluation of the process reveals areas to improve the delivery of enteral nutrition.

Inventory of Exogenous Hemostatic Factors Derived from Arthropods

1999 ◽  
Vol 81 (04) ◽  
pp. 647-656 ◽  
Author(s):  
C. L. Arocha-Piñango ◽  
R. Marchi ◽  
B. Guerrero
Keyword(s):  
Platelet Aggregation ◽  
Defense Mechanism ◽  
Proper Names ◽  
Inhibition Of Platelet Aggregation ◽  
Antithrombin Activity ◽  
Small Proteins ◽  
Hemostatic Factors ◽  
Feeding Process

SummaryIn many arthropods agents have been detected which affect the hemostatic mechanism. Some agents, such as those identified in hematophagus arthropods, seem to have evolved to help the animal in the feeding process while, in others, the function cannot be explained, but may be part of a defense mechanism (see Refs. 1-3).Some arthropods possess several agents while in others one agent has different activities, i.e., antithrombin activity as well as inhibition of platelet aggregation. Many agents have been only partially characterized while others have been cloned and prepared in recombinant form.The majority of the agents are small proteins. As to the nomenclature, some agents have been described by the authors but have not been assigned proper names.

Sign in / Sign up

Export Citation Format

Share Document