Binarization method for chromosomal analysis of primitive plants: the case of Zamia tolimensis and Zamia huilensis (Cycadales, Zamiaceae)

2021 ◽  
Author(s):  
Alfredo J. Torres-Benítez ◽  
María E. Aldana ◽  
Manuel G. Forero
Keyword(s):  
Chromosomal Analysis ◽  
Binarization Method

An Adaptive Binarization Method for Cost-efficient Document Image System in Wavelet Domain

2020 ◽  
Vol 64 (3) ◽  
pp. 30401-1-30401-14 ◽  
Author(s):  
Chih-Hsien Hsia ◽  
Ting-Yu Lin ◽  
Jen-Shiun Chiang
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Document Image ◽  
Background Information ◽  
Raspberry Pi ◽  
Discrete Wavelet ◽  
Image System ◽  
Low Frequencies ◽  
Cost Efficient ◽  
Binarization Method

Abstract In recent years, the preservation of handwritten historical documents and scripts archived by digitized images has been gradually emphasized. However, the selection of different thicknesses of the paper for printing or writing is likely to make the content of the back page seep into the front page. In order to solve this, a cost-efficient document image system is proposed. In this system, the authors use Adaptive Directional Lifting-Based Discrete Wavelet Transform to transform image data from spatial domain to frequency domain and perform on high and low frequencies, respectively. For low frequencies, the authors use local threshold to remove most background information. For high frequencies, they use modified Least Mean Square training algorithm to produce a unique weighted mask and perform convolution on original frequency, respectively. Afterward, Inverse Adaptive Directional Lifting-Based Discrete Wavelet Transform is performed to reconstruct the four subband images to a resulting image with original size. Finally, a global binarization method, Otsu’s method, is applied to transform a gray scale image to a binary image as the output result. The results show that the difference in operation time of this work between a personal computer (PC) and Raspberry Pi is little. Therefore, the proposed cost-efficient document image system which performed on Raspberry Pi embedded platform has the same performance and obtains the same results as those performed on a PC.

Quality of cytogenetic investigations: problems and ways for improvement

2020 ◽  
pp. 22-24
Author(s):  
В.Г. Антоненко ◽  
Н.В. Шилова ◽  
Е.Н. Лукаш ◽  
Э.Р. Бабкеева ◽  
В.Н. Малахов
Keyword(s):  
Quality Assessment ◽  
Russian Federation ◽  
Chromosomal Analysis ◽  
Common Causes

Представлены результаты экспертной оценки качества цитогенетических исследований в лабораториях РФ в системе межлабораторных сличительных испытаний «ФСВОК» в 2018-2019 гг. Обсуждаются наиболее частые причины неудовлетворительных результатов экспертизы и возможные пути улучшения качества цитогенетических исследований. We report the results of quality assessment for preparation of cytogenetic slides and chromosomal analysis in the laboratories of Russian Federation in the system of the interlaboratory comparative examinations “FSVOK” in 2018-2019. Common causes of poor results of assessment and the ways for improvement of quality for cytogenetic investigations are discussed.

A NOTE ON KIDWELL'S CHROMOSOMAL ANALYSIS OF EGG PRODUCTION AND CHAETA NUMBER IN DROSOPHILA MELANOGASTER

1970 ◽  
Vol 12 (2) ◽  
pp. 356-358 ◽  
Author(s):  
P. Glaser ◽  
J. F. Kldwell
Keyword(s):  
Drosophila Melanogaster ◽  
Egg Production ◽  
Genetic Variance ◽  
Chromosomal Analysis ◽  
Epistatic Variance

An earlier paper (Kidwell, J.F., 1969, Can. J. Genet. Cytol 11: 547-557) has described partitioning of the genetic variance of egg production and chaeta number in Drosophila melanogaster, assuming equal frequencies of all chromosomes. Kidwell's data were analyzed again, and the new analyses were based on several panmictic populations with varying frequencies for each genotype. The importances of the several portions of the genetic variance were estimated for each population; several cases are presented. In most cases the ranges were substantial, especially those of the dominance and four-factor epistatic variances. The results of the present study generally support Kidwell's previous conclusions and suggest that epistatic variance should not routinely be assumed negligible.

Turner Syndrome

PEDIATRICS ◽  
1991 ◽  
Vol 87 (5) ◽  
pp. 745-745
Author(s):  
SOLOMON E. LEVIN ◽  
JEFF HARRISBERG ◽  
ALLAN KELLY
Keyword(s):  
Turner Syndrome ◽  
Coarctation Of The Aorta ◽  
Venous Drainage ◽  
Chromosomal Analysis ◽  
Anomalous Pulmonary Venous Drainage ◽  
Phenotypic Features

To the Editor.— We read with great interest the study of Moore et al1 in which they suggest that there may be a significant association of 45,X Turner syndrome and partial anomalous pulmonary venous drainage. We recently encountered a further case with this association lending support to their contention. Our patient was noted at birth to have the phenotypic features of Turner syndrome together with lymphedema. Chromosomal analysis confirmed the Karyotype 45 X0. At 4 months of age a diagnosis of coarctation of the aorta was made when her femoral pulses became impalpable.

scholarly journals Atypical presentation of Goldenher syndrome- a rare scenario

2014 ◽  
Vol 9 (4) ◽  
pp. 51-54
Author(s):  
C Lath ◽  
S Sen ◽  
M Mondal ◽  
D Maiti ◽  
R Singh ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Chromosomal Analysis ◽  
Ocular Involvement ◽  
Atypical Presentation ◽  
Medical Sciences ◽  
Multifactorial Inheritance ◽  
Mandibular Hypoplasia ◽  
Exact Etiology ◽  
Vertebral Anomalies

In 1952 Goldenher described a case with triad of pre auricular tags, mandibular hypoplasia and ocular (epibulbar) dermoid and described the case as Goldenger Syndrome. Exact etiology of this disease is not known. Here we present a case of Goldenher syndrome in a 5 days old newborn who presented with all the classical features except ocular involvement.   Gorlin et.al named this syndrome as oculoauriculovertebral dysplasia due to presence of additional vertebral anomalies .2 Exact etiology of this disease is not known. Most of the cases are sporadic, though autosomal recessive, autosomal dominant and multifactorial inheritance has also been suggested.2.Chromosomal analysis shows no abnormalities.3 In this report we presented a case of Goldenger Syndrome in a 5 days old newborn who presented with all the classical features except occular involvement. Journal of College of Medical Sciences-Nepal, 2013, Vol-9, No-4, 59-62 DOI: http://dx.doi.org/10.3126/jcmsn.v9i4.10239

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