scholarly journals A Preliminary Account of the Diatom Flora of Koria, Chhattisgarh

Our Nature ◽  
2013 ◽  
Vol 10 (1) ◽  
pp. 199-205
Author(s):  
R. Sirmour ◽  
M.L. Naik ◽  
M.P. Goutam
Keyword(s):  
Water Samples ◽  
Acid Digestion ◽  
Digestion Method ◽  
Diatom Flora ◽  
Present Account ◽  
Important Group ◽  
Preliminary Account ◽  
Number Of Microorganisms ◽  
The One ◽  
Collection Sites

Water bodies contain a large number of microorganisms, like bacteria, algae, protozoa etc. Algae are the one of the very important group of the organisms. Diatoms are the well known water planktons belonging to family Bacillariophyceae (Hendy, 1980). Diatom flora of koria was observed by using acid digestion method. The present account is based on the collection of about 5 water samples from different place of koria. 18 species from 11 genera were identified from these collection sites; the genera include Achnanthes, Amphora, Cymbella, Eunotia, Fragilaria, Gomphonema, Hantizschia, Navicula, Nitzschia, Stauroneis and Synedra.DOI: http://dx.doi.org/10.3126/on.v10i1.7782

scholarly journals Study of Diatom Flora of Kaalesar Ghat of Rapti River at Gorakhpur for Forensic Consideration

2021 ◽  
Vol 9 (10) ◽  
pp. 555-559
Author(s):  
Ashutosh Mall
Keyword(s):  
Forensic Science ◽  
Ecological Assessment ◽  
The Other ◽  
Diatom Species ◽  
Acid Digestion ◽  
Digestion Method ◽  
Diatom Flora ◽  
Diatom Test ◽  
Death By Drowning ◽  
Diagnosis Of Death

Abstract: Diatoms are unique algae. They are scientifically known as Bacillariophyceae. Diatoms have been used in forensic science in a variety of ways, the most frequent being the diagnosis of death by drowning. When a person drowns, water will enter the lungs and then enter the bloodstream through ruptures in the peripheral alveoli before being carried to the other organs such as the liver and heart. Naturally, the microscopic contents of the water, which will include diatoms, will pass into the blood as well. The detection of diatoms in the organs can contribute to a diagnosis of death by drowning, a process referred to as the ‘diatom test’. A study was conducted in the department of Forensic Science, SHUATS, Prayagraj which included the extraction and identification of diatoms from the collected water samples from three different sites of Kaalesar Ghat of Rapti River in Gorakhpur. The acid digestion method was used for diatom extraction. And, after analysis total 13 diatom species were found. The identified diatoms were of great ecological assessment that plays an important role in criminal investigations related to premortem or ante-mortem drowning. Keywords: Diatom, Drowning, D-mapping, Rapti-River

Evaluation of heavy metals content in the canned/packed fruit juices from local and imported origin in Lahore, Pakistan

2021 ◽  
Author(s):  
Nazeefa Fatima ◽  
Munazza Khan ◽  
Muhammad Shuaib Kabeer
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption ◽  
Fruit Juices ◽  
Human Consumption ◽  
Acid Digestion ◽  
Digestion Method ◽  
Mean Values ◽  
Nutritive Values ◽  
The Mean ◽  
Mean Concentration

This study was conducted to determine the mean concentration of heavy metals such as lead (Pb), copper (Cu), zinc (Zn), chromium (Cr), manganese (Mn), nickel (Ni), selenium (Se), magnesium (Mg), and iron (Fe) in canned/packed fruits juices, collected from various stores in Lahore in a period of three months. These juices were categorized into four groups; local packed and canned and also imported packed and canned products. Every group consisted of ten samples. By using the di-acid digestion method, the collected samples were digested and analyzed under Atomic Absorption Spectrophotometer (AAS). The results indicated that the mean values of 7 out of 9 tested heavy metals including Pb, Mg, Ni, Fe, Cr, Se and Mn were above permissible limits (set by WHO) in all four understudy groups. Therefore, it was concluded that commercially available fruit juices are not all safe according to their heavy metals content for the human consumption despite their nutritive values.

scholarly journals XI. New bennettitean cones from the British cretaceous

1918 ◽  
Vol 208 (348-359) ◽  
pp. 389-440 ◽  
Keyword(s):  
New Species ◽  
Present Specimen ◽  
Important Group ◽  
Single Fragment ◽  
The One ◽  
Broad Type

This new species of Bennettites , the first petrified remains of the group to be found in the Gault of this country, is based on the structure of an ovulate cone. While it it true that only a portion of one cone is available, yet even this fragment includes hundreds of exquisitely preserved seeds which throw much new light on the structure of that most important group, the Bennettitales. Since the historic description so many years ago of the one and only specimen of the type of the group, B. Gibsonianus (see Carruthers, 1870), no other well petrified cone has been found in this country, and knowledge of the details of the fructifications of the group has been advanced chiefly by studies of the French B. Morierei , and a number of American forms. Beautiful as some of these are, the present specimen surpasses anything yet known in the Bennettitales for perfection of detailed preservation. Many points in the new species are novel, and on variations of less magnitude new fossil genera have been founded; but as in essentials the fruit conforms to the broad type “ Bennettites ,” I prefer to use that widely known generic name for the new species. The material from which the following description is compiled consists of a single fragment of a large ovulate cone. This was cut into as many sections as possible, but yielded only two longitudinal and seven transverse sections. Magnified by two diameters, five of this series of transverse sections are shown on Plate 19.

scholarly journals Chryzypa twierdzenie o naturalnej wieloznaczności wyrazów

2020 ◽  
Vol 15 (2) ◽  
pp. 91-102
Author(s):  
Mikołaj Domaradzki
Keyword(s):  
Concept Formation ◽  
The Other ◽  
Formation Mechanisms ◽  
Present Account ◽  
The One

The purpose of this paper is to analyze Chrysippus’ claim about natural ambiguity of words. The present account assumes that the concept formation mechanisms that were outlined by the Stoics throw some light on the notorious contradiction between the claim about natural relationship between words and things, on the one hand, and the claim about natural ambiguity of words, on the other. We know neither the context of Chrysippus’ postulate nor the examples with which he illustrated it. Thus the following analyses are obviously speculative.However, the interpretations of myths and poetry that were put forward by Chrysippus sit very well with his conviction that ambiguity and figurativeness are  common and natural in language.

scholarly journals The Development, Morphology and Budding of the Ascidian Diazona

1948 ◽  
Vol 27 (2) ◽  
pp. 389-399 ◽  
Author(s):  
N. J. Berrill
Keyword(s):  
Life Cycle ◽  
Asexual Reproduction ◽  
Basic Type ◽  
The Other ◽  
Strong Argument ◽  
Bud Formation ◽  
Present Account ◽  
The Family ◽  
The One ◽  
Complete Account

Diazona is represented in European waters only by Diazona violacea Savigny. It is a compound ascidian forming massive colonies of spectacular size and appearance. In many ways it is the most interesting of all ascidians, for in its adult structure it straddles two commonly accepted orders and in itself is a strong argument against such a division; it is the only oviparous and small egged compound ascidian, two features undoubtedly primitive; and its manner of budding is the simplest and probably is the basic type for the group as a whole. Only fragmentary descriptions of the morphology and reproduction exist, and a more or less complete account of the various stages of the life cycle may be of some value. The family Diazonidae includes, in addition to Diazona itself, the genera Tylobranchion of subantarctic regions, and Rhopalea of Mediterranean and northern waters. In its entirety Diazona appears to link with such divergent forms as Ciona on the one hand and Archidistoma on the other. The fact that Diazona is obtained by dredging in relatively swift offshore waters and lives poorly in an aquarium probably accounts for the existing unsatisfactory state of knowledge of most of its phases. Most of what is known concerns asexual reproduction; and attention has been given, at various times, primarily to the process of regeneration, rather than bud formation, for example by Della Valle (1884), Caullery (1914), Oka (1906) under the name Aphanobranchion, and by Salfi (1926).The material of the present account was collected at various times in the Plymouth area from the Mewstone and Eddystone grounds.

scholarly journals Bioaccumulation of Some Heavy Metals in Ayre Fish (Sperata Aor Hamilton, 1822), Sediment and Water of Dhaleshwari River in Dry Season

2012 ◽  
Vol 40 (1) ◽  
pp. 147-153 ◽  
Author(s):  
Abu Tweb Abu Ahmed ◽  
Suman Mandal ◽  
Didarul Alam Chowdhury ◽  
Abu Rayhan M Tareq ◽  
M Mizanur Rahman
Keyword(s):  
Heavy Metals ◽  
Nitric Acid ◽  
Atomic Absorption ◽  
Water Samples ◽  
Dry Weight ◽  
Acid Digestion ◽  
Fish Organs ◽  
Flame Atomic Absorption ◽  
Flame Atomic Absorption Spectrophotometer ◽  
Nitric Acid Digestion

The present study was carried out to determine the level of bioaccumulation of some heavy metals in a freshwater fish Ayre (Sperata aor Hamilton, 1822) collected from Rajfulbaria (23°48?56.36? N and 90°14?54.04? E) of  Dhaleshwari river. Four heavy metals, namely chromium (Cr), copper (Cu), lead (Pb), and cadmium (Cd) were selected for this study. Metal concentrations were   determined by Flame Atomic Absorption Spectrophotometer after nitric acid  digestion of samples. The concentrations of accumulated heavy metals in fish were  also compared with the concentrations of metals in the sediments and waters of  that river. The level of bioaccumulations in different organs of S. aor were determined separately and compared among them. Average bioaccumulation levels  in S. aor were Cr: 1.458 mg/kg, Cu: 31.500 mg/kg, Pb: 18.776 mg/kg and Cd:  0.487 mg/kg of dry weight. The levels of heavy metals in sediments were Cr: 27.393 mg/kg, Cu: 37.450 mg/kg, Pb: 15.797 mg/kg and Cd: 2.083 mg/kg, and in water were Cr: 0.130 ppm, Cu: 0.000 ppm, Pb: 0.201 ppm and Cd: 0.001 ppm.The bioaccumulation of these four heavy metals in fish organs, sediment and  water samples were also compared with FAO approved standard levels and other  related studies, and found that the levels of bioaccumulation in the Dhaleshwari river exceeded all the standard levels. DOI: http://dx.doi.org/10.3329/bjz.v40i1.12904 Bangladesh J. Zool. 40(1):147-153, 2012

Sign in / Sign up

Export Citation Format

Share Document