scholarly journals The Potency of Toxic Cyanobacteria Planktothrix agardhii isolated from A Retention Pond in Palembang to Cyprinus carpio L: A Preliminary Study

2019 ◽  
Vol 1167 ◽  
pp. 012041
Author(s):  
R. Wulandari ◽  
M. Amalia ◽  
R. Aryawati ◽  
SA. Hamim ◽  
M. Verawaty
Keyword(s):  
Cyprinus Carpio ◽  
Planktothrix Agardhii ◽  
Retention Pond ◽  
Toxic Cyanobacteria ◽  
Preliminary Study

scholarly journals POTENTIAL TOXIC CYANOBACTERIA IN THREE LAKES OF JAKARTA-BOGOR AREA, INDONESIA

2008 ◽  
Vol 33 (1) ◽  
pp. 95-100
Author(s):  
Nining Betawati Prihantini ◽  
Arya Widyawan ◽  
Ronny Rianto ◽  
Yuni Ariyani ◽  
Wishnu Wardhana ◽  
...  
Keyword(s):  
Water Samples ◽  
Potential Toxicity ◽  
Planktothrix Agardhii ◽  
Toxic Cyanobacteria

The research was aimed to understand the composition and dominancy of aquatic microalgae, and to know the potential toxicity of Cyanobacteria occuring in three lakes of Jakarta-Bogor area. The study was done in 2006. The sampling sites were Lake Sunter 2 (North Jakarta), Lake Babakan (South Jakarta), and Lake Lido (Bogor). The water samples were taken using plankton-net (20 tan mesh) with horizontal tow. The results showed that. the number of microalgal genera in Sunter 2, Babakan, and Lido were different, i.e. 10 genera, 40 genera, and 14 genera, respectively. Cyanobacteria were dominant in Sunter 2 (96%) and Babakan (90.01%). The dominant Cyanobacteria in Sunter 2 was Planktothrix agardhii (53.48%), whereas in Babakan was Chroococcus dispersus (68.52%). The second abundant Cyanobacteria in Sunter 2 was Arthrospira (42.54%). Planktothrix agardhii and Arthrospira are known to produce harmful toxin.

scholarly journals PRELIMINARY STUDY ON AQUACULLURE OF CTENOPHARYNGODON IDELLA VAL.

2021 ◽  
Vol 26 (1) ◽  
pp. 143-148
Author(s):  
J. M. Al-Jawda ◽  
A. N. Balasem ◽  
K. R. Asmar ◽  
A - S. K. Ali
Keyword(s):  
Low Temperature ◽  
Cyprinus Carpio ◽  
Grass Carp ◽  
Classical Method ◽  
Silver Carp ◽  
Ctenopharyngodon Idella ◽  
Ceratophyllum Demersum ◽  
Average Weight ◽  
Additional Food ◽  
Preliminary Study

The classical method of aquaculture in Iraq employed Cyprinus carpio L. (Common carp) as monoculture or as predominat species togather with grass carp and silver carp. In the present study monoculture of grass carp was performed. Three - hundreds fingerlings of grass carp of 1.5 g weight were cultured in about 600 m2 eartheen pond from 20th of June till 9th of November, 1997. For the first two months of the experiment, no additional feed was added to what had been available in the pond. For the rest of the culture period, 1773 kg of five species of plants were utilized. They were included 91 kg of Phargmites australis, 972 kg of Paspalim sp., 423 kg of Medicago sativa, 171 kg of Ceratophyllum demersum and 116 kg of Paspalum Paspaloides. In addition to that a total of 150 kg of manure was used as a fertilizer in three occasions. At the end of the experiment the average weight of the fishes was 498 gm ranged from 370 gm to 980 gm. Further study was commence where 300 fingerlings of grass carp weighting 34 gm as an average were cultured together with 50 fingerlings of silver carp (average weight 92 gm). The experiment January 1998. For the first two months of experiment the fishes didn't consume began in additional food probably due to the low temperature of water during this period.

Oxidative stress in Cyprinus carpio to analyze microcystin impact in eutrophic shallow lakes: a preliminary study

2012 ◽  
Vol 14 (8) ◽  
pp. 2195 ◽  
Author(s):  
Katerina A. Moutou ◽  
Stamatis Tsikogias ◽  
Theodoti Papadimitriou ◽  
Ifigenia Kagalou
Keyword(s):  
Oxidative Stress ◽  
Cyprinus Carpio ◽  
Shallow Lakes ◽  
Preliminary Study ◽  
Eutrophic Shallow Lakes

scholarly journals Preliminary Study to Find Occurrence and Dynamics of Toxic Cyanobacteria in Nuwara wewa and Nachchaduwa wewa, Two Man-made Reservoirs in Sri Lanka

2018 ◽  
Vol 6 (5) ◽  
pp. 179-191
Author(s):  
M.C.M. Zakeel ◽  
P.A. Weerasinghe ◽  
H.C.D. Wijayawardhana ◽  
B.A.D.G. Kumari
Keyword(s):  
Cyanobacterial Bloom ◽  
Aquatic Organisms ◽  
Rrna Gene ◽  
Chemical Parameters ◽  
Toxic Cyanobacteria ◽  
Physico Chemical ◽  
Microcystin Production ◽  
Preliminary Study ◽  
Positive Correlations ◽  
Drinking Purpose

Bloom of cyanobacteria in water bodies causes devastating problems to the ecosystem and humans when they depend on these waters for drinking purpose. Microcystin and nodularin, produced by some cyanobacteria, are toxic for human and many other aquatic organisms. Nuwara wewa and Nachchaduwa wewa are two important reservoirs supplying water for drinking purpose in addition to agricultural use. Therefore, preliminary study was conducted to evaluate these reservoirs for the presence of toxic cyanobacteria and their dynamics is of importance to take proper measures to control cyanobacterial growth and to ensure supply of quality water for human drinking purpose. Water samples were collected for 12 months from both reservoirs and physic-chemicals parameters of water were also recorded. Correlations between the physico-chemical parameters of water and the cyanobacterial density were established. Toxic cyanobacteria were isolated and identified using conventional and molecular methods. 16S rRNA gene and mcy-A gene were targeted for molecular identification using PCR. Cyanobacterial density had strong positive correlations with some physico-chemical parameters such as pH, temperature and dissolved oxygen in both reservoirs. These parameters can be used as good indicators to evaluate the condition these reservoirs with respect to cyanobacterial bloom. Some cyanobacterial isolates recovered from both reservoirs harboured mcy-A gene, showing the potential of microcystin production.

scholarly journals Persistence of microcystin production of Planktothrix agardhii exposed to different salinity concentrations

2018 ◽  
Author(s):  
Julia Vergalli ◽  
Audrey Combes ◽  
Evelyne Franquet ◽  
Stéphanie Fayolle ◽  
Katia Comte
Keyword(s):  
Environmental Changes ◽  
Time Frame ◽  
Exponential Growth Phase ◽  
Lower Growth ◽  
Planktothrix Agardhii ◽  
Batch Cultures ◽  
Toxic Cyanobacteria ◽  
Microcystin Production ◽  
Salinity Levels

ABSTRACTRecent reports tend to predict the increase of harmful cyanobacteria in water systems worldwide due to the climatic and environmental changes, which would compromise water quality and public health. Among abiotic changes, the higher salinities are expected to promote the growth of some harmful species such as Planktothrix agardhii, which is known to build up blooms in brackish areas. Since P. agardhii is a common cyanotoxin producer (microcystin-producing), we investigated here the growth and tolerance of this species when exposed in vitro to a range of salinity levels, while assessing its microcystins variation and production in batch cultures during a time-frame experiment of 18 days. The study revealed a salt acclimation of the brackish P. agardhii that still produced microcystins in salty cultures while maintaining its growth ability in low to medium salinities (ranged from 0 to 7.5 g L−1). For higher salinity concentrations (10 to 12.5 g L−1), microcystins were still detected, while significantly lower growth rates were obtained during the exponential growth phase. This suggests that moderate to high salt ranges do not inhibit the microcystins production of P. agardhii at least for several weeks. Finally, the predicted remediation perspectives in a context of environment salinization assumed by environmental policies may be insufficient to eradicate this potential toxic cyanobacteria, especially when this species is already dominant in the waterbodies.

scholarly journals A preliminary study to determine optimal feed rations for Cyprinus carpio L. × Carassius auratus L. hybrids reared in cages in spent cooling water

2019 ◽  
Vol 27 (4) ◽  
pp. 190-197
Author(s):  
Jacek Sadowski ◽  
Magdalena Wielopolska ◽  
Marek Bartłomiejczyk ◽  
Mirosław Półgęsek ◽  
Ewelina Giedziun
Keyword(s):  
Cyprinus Carpio ◽  
Carassius Auratus ◽  
Cooling Water ◽  
Piecewise Regression ◽  
University Of Technology ◽  
Body Weights ◽  
Optimal Feed ◽  
Gross Energy ◽  
The Mean ◽  
Preliminary Study

Abstract This study was conducted to investigate the effects of feeding rations on growth, feed utilization, and proximate composition of Cyprinus carpio × Carassius auratus hybrids reared in cages located in power station cooling waters. The study was conducted at the Fisheries Experimental Station of the Department Aquaculture of West Pomeranian University of Technology in Szczecin located at the Dolna Odra Power Plant. The studies used the carp feed Classic (30.6% protein, 8.8% lipid, 47.5% carbohydrate, and 18.1 MJ kg−1 gross energy) in the following rations: 0.8%, 1.2%, 1.6%, 2.0%, and 2.4% of fish metabolic weight. Each of the variants were tested for 140 days in triplicate at a density of 150 fish per cage. During the experiment, the water temperature ranged from17.1 to 34.3°C, pH was 7.5-9.0, and oxygen was 2.8-12.6 mg dm−3. At the end of the study, the mean individual body weights of the hybrids ranged from 150 to 430 g and the FCR was from 1.44 to 2.32. The optimal piecewise regression model rations were 1.4% of metabolic body weight.

scholarly journals POTENTIAL TOXIC CYANOBACTERIA IN THREE LAKES OF JAKARTA-BOGOR AREA, INDONESIA

2008 ◽  
Vol 33 (1) ◽  
pp. 95
Author(s):  
Nining Betawati Prihantini ◽  
Arya Widyawan ◽  
Ronny Rianto ◽  
Yuni Ariyani ◽  
Wishnu Wardhana ◽  
...  
Keyword(s):  
Water Samples ◽  
Potential Toxicity ◽  
Planktothrix Agardhii ◽  
Toxic Cyanobacteria

The research was aimed to understand the composition and dominancy of aquatic microalgae, and to know the potential toxicity of Cyanobacteria occuring in three lakes of Jakarta-Bogor area. The study was done in 2006. The sampling sites were Lake Sunter 2 (North Jakarta), Lake Babakan (South Jakarta), and Lake Lido (Bogor). The water samples were taken using plankton-net (20 tan mesh) with horizontal tow. The results showed that. the number of microalgal genera in Sunter 2, Babakan, and Lido were different, i.e. 10 genera, 40 genera, and 14 genera, respectively. Cyanobacteria were dominant in Sunter 2 (96%) and Babakan (90.01%). The dominant Cyanobacteria in Sunter 2 was Planktothrix agardhii (53.48%), whereas in Babakan was Chroococcus dispersus (68.52%). The second abundant Cyanobacteria in Sunter 2 was Arthrospira (42.54%). Planktothrix agardhii and Arthrospira are known to produce harmful toxin.

The Ultrastructure of Metastatic Human Mammary Carcinoma After Prolonged Estrogen Therapy

1967 ◽  
Vol 25 ◽  
pp. 180-181
Author(s):  
John H.L. Watson ◽  
John L. Swedo ◽  
R.W. Talley
Keyword(s):  
Mammary Carcinoma ◽  
Osmium Tetroxide ◽  
Estrogen Therapy ◽  
Ultrastructural Level ◽  
Uranyl Acetate ◽  
Human Mammary Carcinoma ◽  
Surgical Biopsy ◽  
Lead Hydroxide ◽  
Preliminary Study ◽  
Hormonal Therapies

A preliminary study of human mammary carcinoma on the ultrastructural level is reported for a metastatic, subcutaneous nodule, obtained as a surgical biopsy. The patient's tumor had responded favorably to a series of hormonal therapies, including androgens, estrogens, progestins, and corticoids for recurring nodules over eight years. The pertinent nodule was removed from the region of the gluteal maximus, two weeks following stilbestrol therapy. It was about 1.5 cms in diameter, and was located within the dermis. Pieces from it were fixed immediately in cold fixatives: phosphate buffered osmium tetroxide, glutaraldehyde, and paraformaldehyde. Embedment in each case was in Vestopal W. Contrasting was done with combinations of uranyl acetate and lead hydroxide.

Fine structure of early degenerating myofibers in the tibialis anterior of young ‘MDX’ mouse

1988 ◽  
Vol 46 ◽  
pp. 322-323
Author(s):  
H.D. Geissinger ◽  
C.K. McDonald-Taylor
Keyword(s):  
Fine Structure ◽  
Muscle Regeneration ◽  
Tibialis Anterior ◽  
Genetic Defect ◽  
Mdx Mouse ◽  
Mdx Mice ◽  
Histopathological Changes ◽  
Electron Microscopic ◽  
Dystrophic Mouse ◽  
Preliminary Study

A new strain of mice, which had arisen by mutation from a dystrophic mouse colony was designated ‘mdx’, because the genetic defect, which manifests itself in brief periods of muscle destruction followed by episodes of muscle regeneration appears to be X-linked. Further studies of histopathological changes in muscle from ‘mdx’ mice at the light microscopic or electron microscopic levels have been published, but only one preliminary study has been on the tibialis anterior (TA) of ‘mdx’ mice less than four weeks old. Lesions in the ‘mdx’ mice vary between different muscles, and centronucleation of fibers in all muscles studied so far appears to be especially prominent in older mice. Lesions in young ‘mdx’ mice have not been studied extensively, and the results appear to be at variance with one another. The degenerative and regenerative aspects of the lesions in the TA of 23 to 26-day-old ‘mdx’ mice appear to vary quantitatively.

Ultrastructural observations of the aorta of calves implanted with a mechanical left ventricular assist device

1990 ◽  
Vol 48 (3) ◽  
pp. 834-835
Author(s):  
J P Cassella ◽  
V Salih ◽  
T R Graham
Keyword(s):  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Left Ventricular ◽  
Aortic Tissue ◽  
Assist Device ◽  
Ventricular Assist ◽  
Transmission Electron ◽  
Left Ventricular Assist ◽  
Preliminary Study

Left ventricular assist systems are being developed for eventual long term or permanent implantation as an alternative to heart transplantation in patients unsuitable for or denied the transplant option. Evaluation of the effects of these devices upon normal physiology is required. A preliminary study was conducted to evaluate the morphology of aortic tissue from calves implanted with a pneumatic Left Ventricular Assist device-LVAD. Two 3 month old heifer calves (calf 1 and calf 2) were electively explanted after 128 days and 47 days respectively. Descending thoracic aortic tissue from both animals was removed immediately post mortem and placed into karnovsky’s fixative. The tissue was subsequently processed for transmission electron microscopy (TEM). Some aortic tissue was fixed in neutral buffered formalin and processed for routine light microscopy.

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