Evaluating formulation and storage of Arthrobacter aurescens strain TC1 as a bioremediation tool for terbuthylazine contaminated soils: Efficacy on abatement of aquatic ecotoxicity

Remediation of soils contaminated with petroleum and its products became a major issue in all regions of the world where on-shore and off-shore exploitation, refining transportation and storage of these products are carried out intensively. Many techniques for remediation of contaminated areas have been developed and tested during decades, being bioremediation both in-situ and ex-situ tow of the available options that require further development, which are currently capturing the attention of different sectors involved with the problem in Brazil. This paper presents the historical perspective of the increasing problem that initially appeared in the most traditional industrialized countries and currently has been intensified in countries with growing economy and technological development such as Brazil. Technological options for remediating the areas, variables relevant to the cleaning process, as well as the most recent trends in Brazil regarding the use of different techniques, with focus on biopiles are briefly presented.

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Cow Dung as a Bioremediation Agent to Petroleum Hydrocarbon Contaminated Agricultural Soils

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2019/v38i630437 ◽

2019 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

T. M. Neethu ◽

P. K. Dubey ◽

A. R. Kaswala ◽

K. G. Patel

Keyword(s):

Contaminated Soils ◽

Agricultural Soils ◽

Cow Dung ◽

Inorganic Contaminants ◽

Chlorinated Pesticides ◽

Photo Degradation ◽

Aspergillus Sp ◽

And Storage ◽

Bioremediation Agent ◽

Bovine Animal

Petroleum derived products are very important as they are energy source and it is prone to accidental spill regularly during the exploration, production, refining, transport and storage. The characteristics of the hydrocarbon content of the petroleum mixture influence the degradability of individual hydrocarbon components; the simpler the hydrocarbon structure the easier its biodegradability and the complex the hydrocarbon structure the harder its biodegradability. Furthermore, the order of biodegradability of hydrocarbon is alkanes > alkenes > alkynes > aromatics. Bioremediation technologies are effective techniques to mitigate many organic and inorganic contaminants such as hydrocarbons, halogenated organic compounds, halogenated organic solvent, non-chlorinated pesticides and herbicides, nitrogen compounds, radionuclides, heavy metals. Bioremediation is having different strategies like an exploration of indigenous microbial populations, bio-stimulation, temperature, soil pH, bio-augmentation, phytoremediation, photo-degradation, phyto-volatilization and phyto-stabilization. Cow dung, excreta of bovine animal is a cheap and easily available bio-resource on earth. Many traditional uses of cow dung are already known in India. Cow dung harbors a diverse group of microorganisms that may be beneficial to humans due to their ability to produce a range of metabolites. Nowadays, there is an increasing research interest in developing the applications of cow dung microorganisms as a bioremediation agent to hydrocarbon contaminated soils. Microorganisms capable of degrading hydrocarbon pollutants have been identified and isolated from cow dung. These organisms include; Micrococcus sp., Bacillus sp., Pseudomonas sp., Enterobacter sp., Proteus kleibsilla, Aspergillus sp., Rhizopus and Penicillium. Therefore, cow dung is an effective, economical and eco-friendly bioremediation agent which can lead to the complete mineralization of hydrocarbon. The post remediation assessment of residual hydrocarbons in contaminated soil can be done with gas chromatographic fingerprinting technique and phytotoxicity bioassay.

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An Overview of Digital Image Processing and Recognition (Invited Paper)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055837 ◽

1982 ◽

Vol 40 ◽

pp. 700-702

Author(s):

R. C. Gonzalez

Keyword(s):

Image Processing ◽

New York ◽

Digital Image Processing ◽

Digital Image ◽

Practical Implementation ◽

Submarine Cable ◽

Vigorous Growth ◽

Digitized Pictures ◽

Processing Techniques ◽

And Storage

Interest in digital image processing techniques dates back to the early 1920's, when digitized pictures of world news events were first transmitted by submarine cable between New York and London. Applications of digital image processing concepts, however, did not become widespread until the middle 1960's, when third-generation digital computers began to offer the speed and storage capabilities required for practical implementation of image processing algorithms. Since then, this area has experienced vigorous growth, having been a subject of interdisciplinary research in fields ranging from engineering and computer science to biology, chemistry, and medicine.

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Control of Secretory Production in the Isopod Hepatopancreas

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100094085 ◽

1972 ◽

Vol 30 ◽

pp. 166-167

Author(s):

John W. Roberts ◽

E. R. Witkus

Keyword(s):

B Cells ◽

Morphological Data ◽

Secretory Product ◽

Secretory Function ◽

Secretory Material ◽

Blind Ending ◽

Secretory Production ◽

Regenerative Cells ◽

Immature Cells ◽

And Storage

The isopod hepatopancreas, as exemplified by Oniscus ascellus. is comprised of four blind-ending diverticula. The regenerative cells at the tip of each diverticula differentiate into either club-shaped B-cells, which serve a secretory function, or into conoid S-cells, which serve in the absorption and storage of nutrients.The glandular B-cells begin producing secretory material with the development of rough endoplasmic reticulum during their process of maturation from the undifferentiated regenerative cells. Cytochemical and morphological data indicate that the hepatopancreas sequentially produces two types of secretory material within the large club-shaped cells. The production of the carbohydrate-like secretory product in immature cells seems to be phased out as the production of the osmiophilic secretion was phased in as the cell matured.

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Quantitative Analysis Of X-Ray Images From Geological Materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013482x ◽

1990 ◽

Vol 48 (2) ◽

pp. 244-245

Author(s):

J. M. Paque ◽

R. Browning ◽

P. L. King ◽

P. Pianetta

Keyword(s):

Quantitative Analysis ◽

Bulk Composition ◽

Principal Component ◽

Analytical Description ◽

Bulk Sample ◽

Geological Samples ◽

X Ray ◽

Software And Hardware ◽

And Storage ◽

Insight Into

Geological samples typically contain many minerals (phases) with multiple element compositions. A complete analytical description should give the number of phases present, the volume occupied by each phase in the bulk sample, the average and range of composition of each phase, and the bulk composition of the sample. A practical approach to providing such a complete description is from quantitative analysis of multi-elemental x-ray images.With the advances in recent years in the speed and storage capabilities of laboratory computers, large quantities of data can be efficiently manipulated. Commercial software and hardware presently available allow simultaneous collection of multiple x-ray images from a sample (up to 16 for the Kevex Delta system). Thus, high resolution x-ray images of the majority of the detectable elements in a sample can be collected. The use of statistical techniques, including principal component analysis (PCA), can provide insight into mineral phase composition and the distribution of minerals within a sample.

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