Ultrastructural observations and a computer model of the helicoidal appearance of the spore wall of Glomus geosporum

ABSTRACT Spores of the arbuscular mycorrhizal fungi (AMF) Glomus geosporum and Glomus constrictum were harvested from single-spore-derived pot cultures with either Plantago lanceolata or Hieracium pilosella as host plants. PCR-denaturing gradient gel electrophoresis analysis revealed that the bacterial communities associated with the spores depended more on AMF than host plant identity. The composition of the bacterial populations linked to the spores could be predominantly influenced by a specific spore wall composition or AMF exudate rather than by specific root exudates. The majority of the bacterial sequences that were common to both G. geosporum and G. constrictum spores were affiliated with taxonomic groups known to degrade biopolymers (Cellvibrio, Chondromyces, Flexibacter, Lysobacter, and Pseudomonas). Scanning electron microscopy of G. geosporum spores revealed that these bacteria are possibly feeding on the outer hyaline spore layer. The process of maturation and eventual germination of AMF spores might then benefit from the activity of the surface microorganisms degrading the outer hyaline wall layer.

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1593: Computer Model to Predict Patency Outcome after Vasoepididymostomy

The Journal of Urology ◽

10.1016/s0022-5347(18)38801-3 ◽

2004 ◽

Vol 171 (4S) ◽

pp. 420-420

Author(s):

Sijo J. Parekattil ◽

Paul Shin ◽

Anthony J. Thomas ◽

Ashok Agarwal

Keyword(s):

Computer Model

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Interpreting Open- and Closed-Loop Transfer Relations Between Cardiorespiratory Parameters: Lessons Learned from a Computer Model of Beat-to-Beat Cardiovascular Regulation

Methods of Information in Medicine ◽

10.1055/s-0038-1636866 ◽

1997 ◽

Vol 36 (04/05) ◽

pp. 237-240

Author(s):

P. Hammer ◽

D. Litvack ◽

J. P. Saul

Keyword(s):

Computer Model ◽

Closed Loop ◽

Computer Models ◽

Cardiovascular Regulation ◽

Cardiovascular Control ◽

Lessons Learned ◽

Multiple Systems ◽

Response Characteristics ◽

Similarities And Differences

Abstract:A computer model of cardiovascular control has been developed based on the response characteristics of cardiovascular control components derived from experiments in animals and humans. Results from the model were compared to those obtained experimentally in humans, and the similarities and differences were used to identify both the strengths and inadequacies of the concepts used to form the model. Findings were confirmatory of some concepts but contrary to some which are firmly held in the literature, indicating that understanding the complexity of cardiovascular control probably requires a combination of experiments and computer models which integrate multiple systems and allow for determination of sufficiency and necessity.

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A Computer Model for Simulation of Drying and Preheating of Wet Iron ore in a Rotary Kiln

Proceedings of the 15th International Heat Transfer Conference ◽

10.1615/ihtc15.hex.009411 ◽

2014 ◽

Author(s):

Ashish Agrawal ◽

Partha S. Ghoshdastidar

Keyword(s):

Computer Model ◽

Rotary Kiln ◽

Iron Ore

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USE OF A COMPUTER MODEL TO EVALUATE ENERGY SAVING POTENTIALS FOR GAS-FIRED FURNACES

Proceeding of International Heat Transfer Conference 6 ◽

10.1615/ihtc6.2270 ◽

1978 ◽

Author(s):

Joseph Chi ◽

George Kelly ◽

David A. Didion

Keyword(s):

Energy Saving ◽

Computer Model

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Laboratory Tire Wear Simulation Derived from Computer Modeling of Suspension Dynamics

Tire Science and Technology ◽

10.2346/1.2141712 ◽

1991 ◽

Vol 19 (3) ◽

pp. 122-141 ◽

Cited By ~ 4

Author(s):

C. Wright ◽

G. L. Pritchett ◽

R. J. Kuster ◽

J. D. Avouris

Keyword(s):

Computer Modeling ◽

Computer Model ◽

Normal Load ◽

Operating Environment ◽

Design Features ◽

Handling Characteristics ◽

Tire Wear ◽

Suspension Dynamics ◽

Instrumented Vehicle ◽

Vehicle Testing

Abstract A method for determining the effect of suspension dynamics on tire wear has been developed. Typical city cycle maneuvers are defined by instrumented vehicle testing and data in the form of forward velocities and steer angles are used as an input to an ADAMS computer model of the vehicle. A simulation of the maneuvers generates a tire's operating environment in the form of normal load, slip, and camber variations, which contain all the subtle effects of the vehicle's suspension, steering, and handling characteristics. A cyclic repetition of the tire's operating environment is constructed and used to control an MTS Flat-Trac machine. In this way, accelerated tire wear can be generated in the laboratory which is directly related to the design features of the vehicle's suspension and steering systems.

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