Biomaterial Database

Substrate-concentration dependence of contraction parameters in glycerinated insect flight muscle fibers from Lethocerus derollei. 1984

S Chaen, and H Shimizu

The contraction characteristics of the dorsal longitudinal muscle of Lethocerus derollei were investigated by applying small sinusoidal length changes (+/- 1% of resting length) to glycerinated muscle bundles and studying the effect of varying the frequency from 0.1 to 10 Hz and the concentration of MgATP from 35 microM to 2.3 mM. The maximum work done by the muscle per cycle increased as the MgATP concentration was decreased from 2.3 mM to 52 microM. Between 52 and 35 microM, the maximum work suddenly changed from a positive to a negative value. The optimal frequency for maximal work shifted from low to high values with increase in the MgATP concentration. As the temperature was increased, the optimal work frequency in 2.3 mM MgATP solution shifted to a higher value. As the MgATP concentration was increased, the optimal frequency for maximal power increased. The maximal value of the power was an increasing function of the MgATP concentration, reaching a plateau above 52 microM MgATP. The muscle stiffness was a decreasing function of the MgATP concentration, and above 52 microM MgATP it reached a minimum of about 22% of that in the rigor solution. These results are discussed in relation to the crossbridge kinetics.

UI	MeSH Term	Description	Entries
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D005426	Flight, Animal	The use of wings or wing-like appendages to remain aloft and move through the air.	Animal Flight,Animal Flights,Flights, Animal
D005990	Glycerol	A trihydroxy sugar alcohol that is an intermediate in carbohydrate and lipid metabolism. It is used as a solvent, emollient, pharmaceutical agent, or sweetening agent.	1,2,3-Propanetriol,Glycerin,1,2,3-Trihydroxypropane,Glycerine
D006430	Hemiptera	A large order of insects characterized by having the mouth parts adapted to piercing or sucking. It is comprised of four suborders: HETEROPTERA, Auchenorrhyncha, Sternorrhyncha, and Coleorrhyncha.	Aleurodoidea,Cicadas,Cicadelloidea,Cicadoidea,Coccoidea,Fulgoroidea,Leafhoppers,Psyllids,Psylloidea,Scale Insects,Treehoppers,Whiteflies,Homoptera,Aleurodoideas,Cicada,Cicadelloideas,Cicadoideas,Coccoideas,Fulgoroideas,Hemipteras,Homopteras,Insect, Scale,Insects, Scale,Leafhopper,Psyllid,Psylloideas,Scale Insect,Treehopper,Whitefly
D000255	Adenosine Triphosphate	An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.	ATP,Adenosine Triphosphate, Calcium Salt,Adenosine Triphosphate, Chromium Salt,Adenosine Triphosphate, Magnesium Salt,Adenosine Triphosphate, Manganese Salt,Adenylpyrophosphate,CaATP,CrATP,Manganese Adenosine Triphosphate,MgATP,MnATP,ATP-MgCl2,Adenosine Triphosphate, Chromium Ammonium Salt,Adenosine Triphosphate, Magnesium Chloride,Atriphos,Chromium Adenosine Triphosphate,Cr(H2O)4 ATP,Magnesium Adenosine Triphosphate,Striadyne,ATP MgCl2
D001703	Biophysics	The study of PHYSICAL PHENOMENA and PHYSICAL PROCESSES as applied to living things.	Mechanobiology
D055592	Biophysical Phenomena	The physical characteristics and processes of biological systems.	Biophysical Concepts,Biophysical Processes,Biophysical Phenomenon,Biophysical Process,Biophysical Concept,Concept, Biophysical,Concepts, Biophysical,Phenomena, Biophysical,Phenomenon, Biophysical,Process, Biophysical,Processes, Biophysical
D066298	In Vitro Techniques	Methods to study reactions or processes taking place in an artificial environment outside the living organism.	In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In