Electrophoretic Analysis of the Contact Zone between Geomys breviceps and Geomys bursarius

1985 ◽  
Vol 66 (3) ◽  
pp. 489-497 ◽  
Author(s):  
E. G. Cothran ◽  
E. G. Zimmerman
Keyword(s):  
Contact Zone ◽  
Electrophoretic Analysis ◽  
Geomys Breviceps ◽  
Geomys Bursarius

Testing Graft Incompatibility Detection Procedures on Interior Douglas-Fir

1991 ◽  
Vol 6 (2) ◽  
pp. 39-42
Author(s):  
David Foushee ◽  
Lauren Fins
Keyword(s):  
Contact Zone ◽  
Pseudotsuga Menziesii ◽  
Electrophoretic Analysis ◽  
Douglas Fir ◽  
Graft Incompatibility

Abstract Grafts of 21 mature inland Douglas-fir trees (Pseudotsuga menziesii var. glauca) were used to test the anatomical and electrophoretic methods of detecting graft incompatibility that were developed for the coastal variety of the species. Both methods were found to be effective. Incompatibility averaged 34% when evaluated by anatomical examination; and electrophoretic analysis of isozymes, 19 to 20 months after grafting, was 82% accurate in detecting incompatible grafts. Sixty percent of the incompatible grafts had externally visible bark fissures along the contact zone between scion and rootstock. One clone had greater than 90% compatibility. West. J. Appl. For. 6(2):39-42.

Studies of a Contact Zone between Chromosomally Characterized Populations of Geomys bursarius

1978 ◽  
Vol 59 (2) ◽  
pp. 233-242 ◽  
Author(s):  
E. F. Pembleton ◽  
R. J. Baker
Keyword(s):  
Contact Zone ◽  
Geomys Bursarius

GENETIC DIVERSITY IN BAMBARA GROUNDNUT (Vigna subterranean) AS REVEALED BY MOLECULAR WEIGHTS OF THE SEEDS’ PROTEINS

2018 ◽  
Vol 30 (2) ◽  
pp. 19-28
Author(s):  
A. J. Oludare ◽  
J. I. Kioko ◽  
A. A. Akeem ◽  
A. T. Olumide ◽  
K. R. Justina ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Seed Proteins ◽  
Electrophoretic Analysis ◽  
Protein Characterization ◽  
Bambara Groundnut ◽  
Vigna Subterranea ◽  
Phylogenetic Relatedness ◽  
Molecular Weights ◽  
National Centre ◽  
Standard Marker

Nine accessions of Bambara groundnut (Vigna subterranea (L.) Verdc.,syn. Voandzeia subterranea (L.) Thouars ex DC.)  obtained from National Centre for Genetic Resources and Biotechnology (NACGRAB), Ibadan, Oyo state, were assessed for their genetic and phylogenetic relatedness through electrophoretic analysis of the seed proteins. 0.2g of the seeds were weighed and macerated with mortar and pestle in 0.2M phosphate buffer containing 0.133M of acid (NaH2PO4) and 0.067 of base (Na2HPO4) at pH 6.5. Protein characterization with standard marker revealed that the seeds of the nine accessions contained proteins (B.S.A, Oval Albumin, Pepsinogen, Trypsinogen and Lysozyme) with molecular weights ranging from 66kda and above, 45 – 65 kDa, 44 – 33 kda, 32-24 kDa and 23-14 kDa, respectively. The student T-test revealed that accessions B, C, E, F, H and I have molecular weights not significantly different from one another (P<0.05) while samples A, D and G showed significantly different values (P>0.05). All the accessions had at least two proteins and two major bands in common. The study revealed intra-specific similarities and genetic diversity in protein contents among the nine accessions of Bambara groundnut (Vigna subterraranea (L.) Verdc.syn

Tire Treadwear — A Comprehensive Evaluation of the Factors: Generic Type, Aspect Ratio, Tread Pattern, and Tread Composition Part IV: Laboratory Measurement of Mechanical Properties and Mechanical Actions of Tires Relating to Treadwear

1986 ◽  
Vol 14 (4) ◽  
pp. 264-291
Author(s):  
K. L. Oblizajek ◽  
A. G. Veith
Keyword(s):  
Mechanical Properties ◽  
Shear Stress ◽  
Contact Zone ◽  
Flexural Rigidity ◽  
Comprehensive Evaluation ◽  
Shear Stiffness ◽  
Shear Stresses ◽  
Lateral Shear ◽  
Band Bending ◽  
Tread Rubber

Abstract Treadwear is explained by specific mechanical properties and actions of tires. Rubber shear stresses in the contact zone between the tire and the road become large at large slip angles. When normal stresses are insufficient to prevent sliding at the rear of the footprint, wear occurs at a rate that depends on test severity. Two experimental approaches are described to relate treadwear to tire characteristics. The first uses transducers imbedded in a simulated road surface to obtain direct measurements of contact stresses on the loaded, freely-rolling, steered tires. The second approach is developed with the aid of a simple carcass, tread-band, tread-rubber tire model. Various tire structural configurations; characterized by carcass spring rate, edgewise flexural band stiffness, and tread rubber shear stiffness; are simulated and lateral shear stress response in the contact zone is determined. Tires featuring high band stiffness and low carcass stiffness generate lower lateral shear stress levels. Furthermore, coupling of tread-rubber stiffness and band flexural rigidity are important in determining level of shear stresses. Laboratory measurements with the described apparatus produced values of tread-band bending and carcass lateral stiffness for several tire constructions. Good correlation is shown between treadwear and a broad range of tire stiffness and test course severities.

Stibnite vein from Dębowina near Bardo (polish Sudetes)

2013 ◽  
Vol 2 (1) ◽  
pp. 28-33
Author(s):  
Piotr Kotula
Keyword(s):  
Contact Zone

Abstract In the contact zone of the Bardo Structure and Kłodzko-Złoty Stok Intrusion and Kłodzko Metamorphic, metasomatic orebearing quartz-carbonate veins rich in Sb, Zn, Cu, Ag, Au, Pb are present. In 1771 the mine ,,Reiche Silber Gluck” within stibnite vein was founded in Dębowina near Bardo. Its entrance was discovered again in 2007. The stibnite vein is mainly build of stibnite and sphalerite and of quartz and dolomite rich in Mn. Stibnite crystallizes as columnar or forming radiate centres and aciculars. Its crystals reach size to 2 mm. Sphalerite appears as individual anhedral and polymineralic grained concentrations reaching size to 2,5 mm. Earlier pyrite and arsenopyrite crystallized - they occur locally in this deposit. There were found also in the deposit tetrahedrite rich in Ag, what wasn't reported earlier in studies from the mine in Dębowina.

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