Evaluation of papillo-incisal distance in different arch forms and with different shapes of incisive papilla in Moradabad population - A descriptive study

Context: The parathyroid glands are very essential for survival. Parathyroid related clinical conditions such as parathyroid adenoma and hyperplasia are common. Different shapes of the human parathyroid glands have been identified. Knowledge of different shapes of the parathyroid gland is essential for surgeon, sonologist, pathologist for better diagnosis and management of parathyroid diseases. Materials and Methods: A descriptive study was designed in the Department of Anatomy, Dhaka Medical College, Dhaka from January to December 2008 to see different shape of the parathyroid gland and was performed on post mortem parathyroid glands of 60 Bangladeshi people of different age, ranging from 15 to 75 years. A total of 207 parathyroid glands were taken from the cadavers. The samples were collected from the unclaimed dead bodies within 24-36 hours after death which were under examination in the Department of Forensic Medicine of Dhaka Medical College, Dhaka. Different shapes were observed by using a hand lens. Results: Parathyroid glands were found to be oval (35.76%), leaf shaped (27.43%), spherical (24.76%), tear-drop shaped (2.41%), rod like (4.83%), sausage like (1.93%), pancake shaped (1.44%) and bean shaped (1.44%). Key words: Parathyroid gland; shape of parathyroid. DOI: 10.3329/jdmc.v18i1.6305 J Dhaka Med Coll. 2009; 18(1) : 44-46

Download Full-text

Structural phenomena in the growth of carbon nanotubes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100149581 ◽

1993 ◽

Vol 51 ◽

pp. 750-751

Author(s):

Jun Jiao

Keyword(s):

Carbon Nanotubes ◽

Growth Mechanism ◽

Carbonaceous Material ◽

Cluster Growth ◽

Structural Elements ◽

Rich Variety ◽

Different Shapes ◽

Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

Download Full-text

Disfluency Characteristics Observed in Young Children With Autism Spectrum Disorders: A Preliminary Report

Perspectives on Fluency and Fluency Disorders ◽

10.1044/ffd20.2.42 ◽

2010 ◽

Vol 20 (2) ◽

pp. 42-50 ◽

Cited By ~ 11

Author(s):

Laura W. Plexico ◽

Julie E. Cleary ◽

Ashlynn McAlpine ◽

Allison M. Plumb

Keyword(s):

Autism Spectrum Disorders ◽

Young Children ◽

Children With Autism ◽

Descriptive Study ◽

Autism Spectrum ◽

Typically Developing ◽

Children With Asd ◽

Young Children With Autism ◽

Spectrum Disorders ◽

Developmental Stuttering

This descriptive study evaluates the speech disfluencies of 8 verbal children between 3 and 5 years of age with autism spectrum disorders (ASD). Speech samples were collected for each child during standardized interactions. Percentage and types of disfluencies observed during speech samples are discussed. Although they did not have a clinical diagnosis of stuttering, all of the young children with ASD in this study produced disfluencies. In addition to stuttering-like disfluencies and other typical disfluencies, the children with ASD also produced atypical disfluencies, which usually are not observed in children with typically developing speech or developmental stuttering. (Yairi & Ambrose, 2005).

Download Full-text