250 research outputs found
FIGURES 4–6 in Observations on a new species of Monocystis Stein, 1848 (Protozoa: Apicomplexa: Monocystidae) Monocystis levinei sp. nov. from an Indian earthworm (Annelida: Oligochaeta) Eutyphoeus incommodus
No full textFIGURES 4–6. Camera lucida drawings of different stages of life cycle of Monocystis levinei sp. nov. Fig. 4. Mature trophozoite; Fig. 5. Gametocyst; Fig. 6. OocystPublished as part of Bandyopadhyay, Probir Kumar, Bhowmik, Biplab & Mitra, Amlan Kumar, 2005, Observations on a new species of Monocystis Stein, 1848 (Protozoa: Apicomplexa: Monocystidae) Monocystis levinei sp. nov. from an Indian earthworm (Annelida: Oligochaeta) Eutyphoeus incommodus, pp. 15-19 in Zootaxa 1016 (1) on page 17, DOI: 10.11646/zootaxa.1016.1.2, http://zenodo.org/record/504929
Nematocystis indicus Bandyopadhyay, Mitra & Bhowmik, 2006, sp. nov.
No full textNematocystis indicus sp. nov. (Figs. 1–4) Gamont Length (GL) 172.0–400.0 µm (257.0± 65.0 µm); Gamont Width (GW) 18.0–49.0 µm (25.0± 9.0 µm); Nucleus Length (NL) 18.0–26.0 µm (20.0± 3.3 µm); Nucleus Width (NW) 9.0–11.0 µm (9.5 ± 0.8 µm); Gametocyst Diameter (GD) 48.0–68.0 µm (56.0± 1.3 µm); Oocyst Length (OL) 7.0– 11.5 µm (9.3 ± 1.1 µm). Gamonts are elongated, with a cylindrical main body and a short wider anterior portion which contains the small nucleus. Both the ends are gradually narrowed like a ‘V’ to a nearly pointed tip. The anterior onethird of the cell is approximately two times wider than the posterior portion. Body length varies from 172.0–400.0 µm (257.0± 65.0 µm). The maximum body width ranges from 18.0–49.0 µm (25.0± 9.0 µm) while the average body width ranges from 5.5 –11.0 µm (7.0± 1.5 µm). Ectoplasm is thin, hyaline, about 1.0–2.0 µm wide. The width of ectoplasm is greatest at the anterior tip where it is 5.0–6.0 µm in thickness. At the posterior end the thickness of the ectoplasm is 1.5 –2.0 µm. Endoplasm is finely granular. Within the endoplasm very small spindleshaped paraglycogen reserve granules of about 1.0 µm by 0.5 µm size have been observed. Nucleus is small, slightly elongate, measuring 18.0–26.0 x 9.0–11.0 µm, having karyosome diffused throughout the nucleoplasm, enclosed within a nuclear membrane. Gametocyst almost rounded with two almost equal gametocytes. Dimension of the gametocyst ranges from 48.0–68.0 µm (56.0± 1.3 µm). Oocysts biconical, measuring 7.0– 11.5 µm (9.3 ± 11.0 µm). Taxonomic summary Type Host: Perionyx excavatus (Perrier) Location of the parasite: Seminal vesicles of the host. Type Locality: Sandeshkhali, South 24 Parganas, West Bengal, India Symbiotype: Host PE 03– 16 / 11 / 2004 deposited in the museum of the Department of Zoology, University of Kalyani, Kalyani 741235, West Bengal, India. Type specimens: Syntypes on the slides no. NI/04, NI/ 12 and NI/ 14 are deposited in the Museum of the Zoological Survey of India, Kolkata 700016 (Registration no. 2901, 2903, 2904). Etymology: The species Nematocystis indicus sp. nov. has been named after our motherland, India.Published as part of Bandyopadhyay, Probir K., Mitra, Amlan Kumar & Bhowmik, Biplab, 2006, Nematocystis indicus sp. nov. (Apicomplexa: Monocystidae) from an Indian earthworm (Annelida: Oligochaeta) Perionyx excavatus (Perrier), pp. 63-68 in Zootaxa 1296 on page 65, DOI: 10.5281/zenodo.27353
FIGURES 1–4 in Nematocystis indicus sp. nov. (Apicomplexa: Monocystidae) from an Indian earthworm (Annelida: Oligochaeta) Perionyx excavatus (Perrier)
No full textFIGURES 1–4. Photomicrographs of different stages of the life cycle of Nematocystis indicus sp. nov. obtained from seminal vesicles of Perionyx excavatus (Perrier). 1. A gamont (scale bar= 100 µm); 2. Enlarged view of the anterior end of a gamont (scale bar= 50 µm); 3. A gametocyst (scale bar= 50 µm); 4. Oocysts (scale bar= 10 µm).Published as part of Bandyopadhyay, Probir K., Mitra, Amlan Kumar & Bhowmik, Biplab, 2006, Nematocystis indicus sp. nov. (Apicomplexa: Monocystidae) from an Indian earthworm (Annelida: Oligochaeta) Perionyx excavatus (Perrier), pp. 63-68 in Zootaxa 1296 on page 66, DOI: 10.5281/zenodo.27353
FIGURES 1–3 in Observations on a new species of Monocystis Stein, 1848 (Protozoa: Apicomplexa: Monocystidae) Monocystis levinei sp. nov. from an Indian earthworm (Annelida: Oligochaeta) Eutyphoeus incommodus
No full textFIGURES 1–3. Photomicrographs of different stages of life cycle of Monocystis levinei sp. nov. Fig1. Mature trophozoite; Fig. 2. Gametocyst; Fig. 3 Oocyst. Scale bars 100µm (Figs.1–2); 10µm (Fig. 3).Published as part of Bandyopadhyay, Probir Kumar, Bhowmik, Biplab & Mitra, Amlan Kumar, 2005, Observations on a new species of Monocystis Stein, 1848 (Protozoa: Apicomplexa: Monocystidae) Monocystis levinei sp. nov. from an Indian earthworm (Annelida: Oligochaeta) Eutyphoeus incommodus, pp. 15-19 in Zootaxa 1016 (1) on page 17, DOI: 10.11646/zootaxa.1016.1.2, http://zenodo.org/record/504929
Not Available
No full textVersion: 1.0.0
Imports: utils, minimalRSD, stats
Published:2017-03-21
Author: Shwetank Lall [aut, cre], Arpan Bhowmik [ctb], Eldho Varghese [aut], Seema Jaggi [ctb], Cini Varghese [ctb]
Maintainer: Shwetank Lall
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Citation: FMC citation info
In views: ExperimentalDesignAn R package to generate cost effective minimally changed run sequences for symmetrical as well as asymmetrical factorial designsNot Availabl
Prevalence of Lytocestus indicus (Lytocestidae) (Moghe, 1925) (Woodland, 1926) in Clarias magur (Clariidae) (Hamilton, 1822) and Its Histopathological Study from West Bengal, India
No full textIn the present study, histopathological damage in the gut of Clarias magur caused by the parasite Lytocestus indicus has been investigated. This finding reveals that the infection induces pathological changes in the host’s gut wall. Histopathological examination of both infected and non-infected gut of Clarias magur revealed that the non-infected tissues exhibited intact villi and epithelial layers. In contrast, the infected tissues showed extensive damage, including destruction of the villi and epithelium. The parasite was noticed to remain attached to the wall of the stomach. The cestode was found to have a dorsoventrally flattened, elongated body with a digitiform scolex. The intestinal lumen and villi of the host fish were observed to be anchored by the parasite, leading to blockage of the intestinal passage and rupture of the mucosal and submucosal layers. Vacuolation within the gastrointestinal layers was also noted. Seasonal fluctuations were recorded (premonsoon, monsoon, and postmonsoon) during this investigation. The findings revealed seasonal variations in prevalence, mean intensity, and relative abundance, with higher values observed during the summer. This is the first report documenting the intestinal pathology in the fish Clarias magur caused by the cestode parasite Lytocestus indicus from North Bengal, West Bengal, India
Monocystis julkae sp.nov., (Protista: Apicomplexa: Monocystidae) a new aseptate gregarine species of the genus Monocystis Stein, 1848 obtain from an Indian Earthworm, Eutyphoeus kherai, Julka, 1978
No full textPerformance Evaluation of Polybenzimidazole for Potential Aerospace Applications
No full textWith the increasing use of polymer based composite materials, there is an increasing demand of polymeric resins with high glass transition temperature, high thermal stability and excellent mechanical properties at high temperature. Polybenzimidazole (PBI) is a recently emerged high performance polymer. It has the highest glass transition temperature of any commercially available organic polymer, high decomposition temperature, good oxidation resistance and it maintains excellent strength at cryogenic temperatures. Due to its excellent thermal and mechanical properties, PBI has great potential to be used for many high temperature applications. The present work has contributed to the knowledge and understanding of several aspects of the PBI polymer. Different problems related to the processing of unfilled and carbon nano-fibers reinforced PBI in the form of film, coating and adhesive are highlighted. Performance of PBI after exposure to various environmental conditions is evaluated. PBI has shown great potential to be used as fire resistant coating in aircraft. It also has revealed its potential to be used for different space applications.Structure Integrity and Composite groupAerospace Engineerin
A Harmony Search Based Wrapper Feature Selection Method for Holistic Bangla Word Recognition
No full textAbstractA lot of search approaches have been explored for the selection of features in pattern classification domain in order to discover significant subset of the features which produces better accuracy. In this paper, we introduced a Harmony Search (HS) algorithm based feature selection method for feature dimensionality reduction in handwritten Bangla word recognition problem. This algorithm has been implemented to reduce the feature dimensionality of a technique described in one of our previous papers by Bhowmik et al.1. In the said paper, a set of 65 elliptical features were computed for handwritten Bangla word recognition purpose and a recognition accuracy of 81.37% was achieved using Multi Layer Perceptron (MLP) classifier. In the present work, a subset containing 48 features (approximately 75% of said feature vector) has been selected by HS based wrapper feature selection method which produces an accuracy rate of 90.29%. Reasonable outcomes also validates that the introduced algorithm utilizes optimal number of features while showing higher classification accuracies when compared to two standard evolutionary algorithms like Genetic Algorithm (GA), Particle Swarm Optimization (PSO) and statistical feature dimensionality reduction technique like Principal Component Analysis (PCA). This confirms the suitability of HS algorithm to the holistic handwritten word recognition problem
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