The pore size modification of a layered aluminophosphate [Al3P4O16C9H24N3] by rational selection of the intercalated template cation

1995 ◽  
pp. 1979 ◽  
Author(s):  
Philip A. Barrett ◽  
Richard H. Jones
Keyword(s):  
Pore Size ◽  
Rational Selection ◽  
Size Modification ◽  
Pore Size Modification ◽  
Selection Of

Pore size modification of macroporous crosslinked poly(dicyclopentadiene)

2003 ◽  
Vol 41 (13) ◽  
pp. 2036-2046 ◽  
Author(s):  
Alberto Della Martina ◽  
L�szl� Garamszegi ◽  
J�ns G. Hilborn
Keyword(s):  
Pore Size ◽  
Size Modification ◽  
Pore Size Modification

scholarly journals The use of cement concrete pavements for roads, depending on climatic conditions

2019 ◽  
Vol 13 (3) ◽  
pp. 235-240
Author(s):  
Iryna Solonenko
Keyword(s):  
European Union ◽  
Statistical Models ◽  
Road Network ◽  
The European Union ◽  
Rational Selection ◽  
Cement Concrete ◽  
The Road ◽  
Road Pavement ◽  
Operational Characteristics ◽  
Selection Of

The development of road network infrastructure is an important component of the economic development of the European Union. Updating of the road network contributes to the integration of the economies of countries into a coherent whole. The road network provides the free movement of citizens, the movement of goods and the effective implementation of various services. The increase in the length of the road network leads to an increase in the financial and material costs necessary to ensure its maintenance and repair. One of the ways to reduce costs is by strengthening the physic-mechanical and operational characteristics of the pavement due to the widespread use of cement concrete. The quality of the pavement of cement concrete depends largely on the rational selection of its composition. This allows a significant increase in the durability of road pavement. The purpose of the research was: the development of recommendations for the rational selection of the composition of the road pavement material of cement concrete, aimed at upgrading longevity, and taking into account its frost resistance grade. According to the goal, the following tasks were developed: the analyses of the climatic zones in which the road network of the European Union is located; the development of a research plan, a selection of the response function and influence factors; the study of physico-mechanical and operational characteristics of the researched material of road pavement; on the basis of the obtained data, the calculation of the complex of experimental-statistical models, which describe the physico-mechanical and operational characteristics of the road pavement material; on the basis of experimental statistical models, a method was proposed for selecting the rational compositions of the cement concrete pavement road material depending on the conditions of its application. The results presented in the article can be used in engineering and scientific practice for the selection of road pavement from cement concrete for highways.

scholarly journals Rational selection of treatment methods in recurrent clubfoot

2021 ◽  
pp. 64-71
Author(s):  
G. V. Divovich
Keyword(s):  
Surgical Treatment ◽  
Bone Growth ◽  
Soft Tissues ◽  
Primary Treatment ◽  
Ponseti Method ◽  
Growth Potential ◽  
Idiopathic Clubfoot ◽  
Rational Selection ◽  
Congenital Clubfoot ◽  
Selection Of

Objective. Based on an analytical assessment of the results of surgical treatment of children with equinovarus foot deformity of various origins (idiopathic clubfoot, syndromic clubfoot), to determine a way of rational selection of surgical techniquesin each specifc case.Materials and methods. The results of the treatment of 78 children with congenital idiopathic clubfoot over the period 2010–2018 were assessed in comparison with the results of the treatment of 41 children with recurrent congenital clubfoot, whose primary treatment had been carried out before 2010. We have gained the experience in treating 30 children with severe clubfoot syndrome (meningomyelocele, CNS lesions, chromosomal diseases and others).Results. In the treatment of congenital clubfoot with the Ponseti method, recurrences occur in 21.79 % of the cases, and in the traditional treatment — in 57.74 %. The Ponseti surgical treatment of recurrences consists in performing release operations on the tendon-ligament apparatus from mini-accesses. Cases of rigid, long-standing deformities require extensive releases on soft tissues, as well as resection and arthrodesis interventions on the joints of the foot. The treatment of clubfoot syndrome requires “surgically aggressive” methods of correction in early childhood.Conclusion. In the idiopathic variants of clubfoot and its relapses, it is possible to correct the vicious position of the feet by minimally invasive operations with minimal damage to the tissues of the circumflex joints and without damage to the flexor tendons and their sheaths in the medial ankle area. Long-standing recurrent rigid variants, as well as syndromic clubfoot, presuppose the performance of extensive releases, osteotomies and arthrodetic resections of the joints of the foot at an early age. A promising direction for clubfoot correction in the process of child development is a surgery with the use of the bone growth potential of the lower leg and foot.

Rational selection of immunodominant and preserved epitope Sm043300e from Schistosoma mansoni and design of a chimeric molecule for biotechnological purposes

2018 ◽  
Vol 93 ◽  
pp. 133-143 ◽  
Author(s):  
Cláudia de Souza ◽  
Marcelo Donizete Lopes ◽  
Flávio Martins De Oliveira ◽  
Maria Juliana Ferreira Passos ◽  
Laís Cunha Grossi Ferreira ◽  
...  
Keyword(s):  
Schistosoma Mansoni ◽  
Rational Selection ◽  
Selection Of
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