Robert C. Bayer

ORCID: 0000-0002-8528-4430
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About
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Research Areas
  • Aquaculture Nutrition and Growth
  • Crustacean biology and ecology
  • Marine and fisheries research
  • Animal Nutrition and Physiology
  • Gas Dynamics and Kinetic Theory
  • Aquaculture disease management and microbiota
  • Electron and X-Ray Spectroscopy Techniques
  • Meat and Animal Product Quality
  • Parasite Biology and Host Interactions
  • Computational Fluid Dynamics and Aerodynamics
  • Protein Hydrolysis and Bioactive Peptides
  • Plasma Diagnostics and Applications
  • Neurobiology and Insect Physiology Research
  • Metal and Thin Film Mechanics
  • Advanced Sensor Technologies Research
  • Identification and Quantification in Food
  • Plasma and Flow Control in Aerodynamics
  • Vacuum and Plasma Arcs
  • Heat Transfer and Optimization
  • Scientific Measurement and Uncertainty Evaluation
  • Marine Bivalve and Aquaculture Studies
  • Advancements in Photolithography Techniques
  • Fish biology, ecology, and behavior
  • Laser Design and Applications
  • Microbial infections and disease research

Brno University of Technology
2016-2024

University of Maine
2001-2022

Rogers (United States)
2003-2006

Loyola University Medical Center
2000

University of Alabama at Birmingham
2000

University of Calgary
2000

Bio Concept Laboratories (United States)
2000

Western University
2000

Evanston Hospital
2000

Stanford University
2000

This paper describes the methodology of combining experimental measurements with mathematical–physics analyses in investigation flow aperture and nozzle. The nozzle separate differentially pumped chamber from specimen an environmental scanning electron microscope (ESEM). Experimental are provided by temperature pressure sensors that meet demanding conditions cryogenic zones low pressures. maintains required difference between chambers. Since it separates large gradient, critical occurs on...

10.3390/s24072166 article EN cc-by Sensors 2024-03-28

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 24:143-148 (1996) - doi:10.3354/dao024143 Description Anophryoides haemophila n. sp. (Scuticociliatida: Orchitophryidae), a pathogen American lobsters Homarus americanus Cawthorn RJ, Lynn DH, Despres B, MacMillan R, Maloney Loughlin M, Bayer R The etiological agent 'bumper car' disease in is described as new species...

10.3354/dao024143 article EN Diseases of Aquatic Organisms 1996-01-01

The epithelial surface of the intestine chicks 1 day to 14 weeks age was examined with both scanning and transmission electron microscopes. Most intestinal villi were seen be plate-like structures. During first week post-hatch, goblet cell orifices easily seen. Goblet pores not readily apparent in older birds. this stage early development discontinuity among some cells. birds one or showed a more convoluted mucosal than younger Areas extrusion observed at tips villi. three dimensional...

10.3382/ps.0540155 article EN cc-by-nc-nd Poultry Science 1975-01-01

ABSTRACT Studies were undertaken to characterize and determine the pathogenic mechanisms involved in a newly described systemic disease Homarus americanus (American lobster) caused by Vibrio fluvialis -like microorganism. Nineteen isolates obtained from eight of nine lobsters sampled. Biochemically, resembled V. , grew optimally at 20°C; none could grow temperatures above 23°C. The type strain (1AMA) displayed thermal reduction time (D value) 5.77 min 37°C. All required least 1% NaCl for...

10.1128/aem.69.12.7435-7446.2003 article EN Applied and Environmental Microbiology 2003-12-01

Abstract The crab‐processing industries generate millions of pounds by‐product annually, which results in a loss edible product and presents considerable waste disposal problem. purpose this research was to investigate the use (CB) development calcium‐rich expanded snack. specific objectives were examine effects type CB (wet or dry), feed composition screw speed (150 250 rpm) on selected properties extruded snacks. Product formulations consisting 0–400 g kg −1 combined with corn meal potato...

10.1002/jsfa.1520 article EN Journal of the Science of Food and Agriculture 2003-07-25

ABSTRACT. We have determined the nucleotide sequence of nuclear gene encoding small‐subunit ribosomal ribonucleic acid ciliate Anophryoides haemophila , a parasite American lobster Homarus americanus. The is 1763 bp in length, and has guanosine‐plus‐cytosine content 43.9%. Inferred phylogenetic frameworks strongly support monophyly scuticociliates, suggest that order Scuticociliatida should be elevated to at least subclass rank. Oligonucleotide probes based on A. ssu‐rDNA can discriminate...

10.1111/j.1550-7408.1996.tb03998.x article EN Journal of Eukaryotic Microbiology 1996-07-01

The feasibility of soya-based diets for pounded American lobster, Homarus americanus, was investigated using (40% protein) low-fat soya-bean meal (SBM) containing various proportions freeze-dried krill hydrolysate (FDKH) at 0, 12.5, 25, 50, 75, and 100% dietary protein, in a 60-day trial stage 5 juveniles. Diets fresh blue-mussel, Mytilus edulis, diet protein from fish (FM), approximating the industry fish, were included comparison. Specific growth rates (SGR) not significantly different all...

10.1046/j.1365-2095.2001.00154.x article EN Aquaculture Nutrition 2001-03-05

The mucosal surface of the chicken crop was examined with scanning electron microscope. proximal region in relation to esophagus differed markedly from distal region. nearest showed a slightly folded very dense bacterial population while located apical diverticulum smoother numerous sloughing cells and sparse population. A potential for significant microbiological fermentation digestion feed is indicated.

10.3382/ps.0540703 article EN cc-by-nc-nd Poultry Science 1975-05-01

The soft-shell clam, Mya arenaria (L. 1758), has the highest landed value of Maine bivalves. Landings have been variable over last century with current landings one third their historical highs caused by low harvests in Eastern Maine. Diminished clam populations subjected to constant fishing pressure and heavy predation green crabs apparently unchecked winterkill. Clam stocks previously closed harvesting because pollution are now dug. Reduced breeding tasked produce a sufficient set overcome...

10.2983/0730-8000(2006)25[475:timscl]2.0.co;2 article EN Journal of Shellfish Research 2006-08-01

Nutrient and essential amino acid analyses of the stomach contents wild adult American lobsters (Homarus americanus) collected from offshore inshore populations indicated consumed varying nutrient levels according to their stage molt. For example, soft-shell ate a higher level mineral constituent. The location animal had no effect on intake. composition protein in remained same throughout molt cycle, but change source with animal. relationship between crude gross energy was constant...

10.1139/f79-134 article EN Journal of the Fisheries Research Board of Canada 1979-08-01

Equipment found in many animal science oriented laboratories was used to develop a reliable straight forward procedure for preparing soft tissue scanning electron microscopy. Tissues were fixed glutaraldehyde and osmium tetroxide, dehydrated alcohol dried lyophilizer. It that freezing not essential artifact-free appearance. Charging under the beam further reduced by attaching specimens SEM mounting stubs with electrically-conducting cement cited herein. This resulted gastrointestinal tract...

10.2527/jas1974.382354x article EN Journal of Animal Science 1974-02-01

Hemolymph from the American lobster (Homarus americanus) was analyzed by optical spectroscopy for concentration of total hemolymph proteins and results were compared with a more traditional technique: refractometry. Absorbance peaks at 280 nm protein 334 hemocyanin studied, equivalent refractometry readings, correlated to vitality lobster. These spectroscopic measurements constitute engineering data in design future noninvasive, field-deployable microinstrument sort according their health...

10.2983/035.028.0421 article EN Journal of Shellfish Research 2009-11-27

Abstract A major issue for travel and tourism practitioners, researchers governmental leaders are determining the value of experiences deliverable via destination assets. We hypothesize that Maine's ‘lobster culture’ (lobster cuisine, lobster fishing, fishing villages) is an important part coastal Maine tourist experience industry relies on presence active fishery its economic success. This paper proposes a method valuing asset in trade by derivable from it, namely cuisine village culture....

10.1111/j.1745-4506.2008.00091.x article EN Journal of Foodservice 2008-03-19

In this paper, we describe the possibility of using energy a compressed air flow, where cryogenic temperatures are achieved within flow behind nozzle, when reaching critical in order to maximize gained. Compared air, obtained thermoelectrically is negligible, but not zero. We therefore primarily aiming use available sources. Behind aperture separating regions with pressure difference several atmospheres, supersonic large temperature drop develops. Based on Seebeck effect, thermocouple placed...

10.3390/s21186031 article EN cc-by Sensors 2021-09-09

This paper describes the combination of experimental measurements with mathematical–physical analysis during investigation flow in an aperture at low pressures a prepared chamber. In first step, pressure specimen chamber and its outlet were taken pumping process converted atmospheric into operating typical for current AQUASEM II environmental electron microscope ISI CAS Brno. Based on these results, model was tuned Ansys Fluent system subsequently used slip regime nozzle wall pressure. These...

10.3390/s22239033 article EN cc-by Sensors 2022-11-22

ABSTRACT Twenty-nine percent of trapped nonovigerous females and 69% ovigerous lobsters were found to be V-notched, during a three-year survey trap hauls conducted in October 1982-1984 by the Maine Lobstermen's Association. The size-frequency distribution V-notched is biased towards larger relative that unmarked females. Calculated numbers annual eggs per about nine times greater than for as result their size, hence proportion sexually mature with higher fecundity. These preliminary results...

10.2307/1548449 article EN Journal of Crustacean Biology 1989-02-01

A high incidence of feather follicle infection was observed in broilers reared cages with wood slat floors. The significantly higher for males than females within cage-reared at 59 days age. Male 50 age had a lower the condition hatch mates Intact follicles were removed from freshly killed birds and prepared scanning electron microscopy (SEM). Examination infected revealed surface detail about lesions. Removal encrustations covering numerous cocci type bacteria base follicle. Infected...

10.3382/ps.0551194 article EN cc-by-nc-nd Poultry Science 1976-07-01

Internal short-circuit is the most dangerous abusive condition for Li-ion batteries and has been root cause several catastrophic accidents involving in recent years. Large-format are particularly vulnerable to internal short-circuits because of high energy content. Nail penetration test commonly used study short-circuits, but results usually have poor reproducibility offer limited insight. This paper deals with a possibility numerical simulation short circuit using FEM.

10.1149/07401.0071ecst article EN ECS Transactions 2016-12-06
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