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Soybean grain resistance to fracture

86%
Data for the force necessary to fracture the isolated calvaria (skull cap) are not available in the extant literature. Twenty dry adult calvaria were tested to failure quasistatically at the vertex using a 15-kN load cell. The forces necessary to fracture or cause diastasis of calvarial sutures were then documented and gross examination of the specimens made. Failure forces had a mean measurement of 2772 N. Initial fractures did not cross suture lines. Prior to complete destruction of the calvaria there were 7 specimens in which all sutures of the calvaria became diastatic, 6 specimens in which the calvaria became diastatic along only the coronal sutures, 2 specimens in which the calvaria became diastatic along only the sagittal suture and 5 specimens in which there were diagonal linear parietal bone fractures. Our hopes are that these data may contribute to the structural design of more safer protective devices for use in our society, assist in predicting injury and aid in the construction of treatment paradigms.
Introduction and objective. Epidemiological assessment of maxillofacial fractures carried out by a given specialized centre may constitute valuable material for comparison with other regions of Poland and the European Union. This material could help standardize the present methods of treating craniofacial skeleton dislocations, and plan appropriate financial resources both for specialized treatment of such fractures and fractures that require multidisciplinary care. Moreover, the frequency of complicated maxillofacial fractures leading to residual disability and circumstances in which fracture occurred may be useful for the Social Security authorities. Materials and methods. This study is a continuation of research on maxillofacial traumatology carried by the Maxillofacial Department of the Medical University in Wrocław, Lower Silesia. Since 1956, a statistical review of maxillofacial fractures has been kept in 5 or 10-year periods. Statistical analysis of this kind is useful in indentifying the frequency of the phenomenon, taking suitable treatment precautions, verifying treatment methods, and analyzing costs and losses incurred as a result of absence at work. Sociological aspect of such studies includes indicating sources of socially adverse phenomena, i.e. violence or alcohol abuse. The studies were based on clinical documentation of 937 patients, where dependencies between chosen parameters were identified. As a basic statistical analysis of variable interdependence the χ2 test of independence was applied. Conclusions. Lately, there have been more maxillofacial fractures resulting from civilization changes. Simultaneously, there are new treatment methods and significant progress has been made regarding materials that are used in these treatments.
The management of comminuted tibial fractures is a challenging problem in small animal orthopedics. External skeletal fixators with Maynard clamps and Schanz pins are commonly used for the osteosynthesis of such fractures. The aim of this study was to perform a clinical assessment of Schanz pins with type 11 frame external fixators in the treatment of comminuted tibial fractures, and the possibility of pin changing when osteolysis and pins loosening appear using Maynard clamps. Schanz pins and external fixators were applied in five dogs. The healing of the treated tibia bones was noted in all cases. Radiological signs of osteolysis, pin loosening and pin tract discharge were observed in two dogs. The results obtained indicate that Schanz pins with type II frame external fixators are reliable and easily manageable. It was also ascertained that Maynard clamps are especially useful for quick pin changing.
The results of a magnetic study of the Okenugbo Area of Ago-Iwoye, Southwestern Nigeria are presented for the evaluation of the geostructural settings in the area to determine the competency of the basement for building constructions. The study area lies within Longitude N - N and Latitude E and E in the basement complex of Nigeria. Three magnetic profiles were established for the evaluation and the magnetic anomaly map, the regional geology and its analytic signal amplitude helped in identifying the nature and depth of the magnetic sources in the study region. The magnetic residual values range from -2400 nT to +1800 nT. The area shows magnetic closures of various sizes at the Western part of the study area trending West with prominence at the center and distributed East-West which has been interpreted as fractured or faulted zones. The depth estimate revealed the apparent depth to the causative body from the surface and the basement depth range from 4.3 to 21.3 m which agrees with other literatures. The study has revealed that the area is generally competent for high rise structures and industrial site while the faulted/fractured zones are prospective better locations for hydrogeological purposes.
The aim of the presented investigations was to analyse the influence of parameters of particleboards production on cutting properties of boards. Parameters that varied were temperature (180 and 220 °C) and pressure (2.5 and 4.0 MPa). Factors to define the cutting properties were: the work of fracture and the work of chip formation. Those factors describe the general work of cutting. Sharp and blunt tools were used. Cutting tests were carried out by using an equipped microtome technique.
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