scholarly journals Inhibition of green algae growth by corrole-based photosensitizers

2014 ◽  
Vol 118 (2) ◽  
pp. 305-312 ◽  
Author(s):  
J. Pohl ◽  
I. Saltsman ◽  
A. Mahammed ◽  
Z. Gross ◽  
B. Röder
Keyword(s):  
Green Algae ◽  
Algae Growth

Diagnosis and management of green algae in low land paddy fields of Cauvery delta zone, Tamil Nadu

2021 ◽  
Vol 58 (1) ◽  
pp. 33-42
Author(s):  
M Jeya Bharathi ◽  
M Raju ◽  
S Elamathi
Keyword(s):  
Green Algae ◽  
Tamil Nadu ◽  
Rice Cultivation ◽  
Rice Root ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Green Algal ◽  
Algae Growth ◽  
Cauvery Delta ◽  
Soil And Water

Rice is a prime food crop for Asian countries. Wet land rice cultivation contributes maximum grain yield than dry land rice. Cauvery delta is a predominant area for rice cultivation in Tamil Nadu. Green algae growth during Kuruvai (June -August) season is a serious problem in wet land rice. These algae growth create anaerobic condition and prevent rice root respiration. The entire rice root was uprooted and floated on the stagnated water during initial stage. There is no preliminary study for green algae control in rice field. Soil and water samples were collected and analyzed for the nature of occurrence. Laboratory and field experiments were conducted to find out the remedial measures. The results of soil and water sample analysis showed that use of bore well water and dumping of phosphatic fertilizers leads to salt accumulation which favours the green algal growth. The results of the laboratory experiment revealed that the CuSO4 londox power, propiconazole and hexaconazole showed moderate inhibition on 5th day after treatment. The findings from field experiment indicated that use of conoweeder, alternate wetting and drying and CuSo4 drenching @ of 2.5 kg/ha when green algae appearance has just noticed or 5.0 kg/ha when severe growth occurred was effective in managing the green algae. Among all measures, alternate wetting and drying is the best management practices. CuSO4 drenching reduces around 70% of the growth. Even though CuSO4 react negatively with algae growth, soil pH changes and salt concentration play a major role on the CuSO4 action towards green algae. In order to maintain soil health condition, biofertilizer application, crop rotation, green manure trampling to be practised to recover the soil from alkaline pH, removal of accumulated salt and to control the algae growth using CuSO4.

Blue-Green Algae: Growth

Nature ◽  
1961 ◽  
Vol 192 (4809) ◽  
pp. 1274-1275 ◽  
Author(s):  
J. S. BUNT
Keyword(s):  
Green Algae ◽  
Blue Green Algae ◽  
Algae Growth

Preparation of TiO2 -Pillared Montmorillonite as Application to the Control of Blue Green Algae Growth in Eutrophic Water

2011 ◽  
Vol 295-297 ◽  
pp. 330-336
Author(s):  
Hong Quan Wang ◽  
Chun Jie Yan ◽  
Guo Jing Shu ◽  
Duo Wang ◽  
Hua Li Zhang ◽  
...  
Keyword(s):  
Surface Charge ◽  
Green Algae ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Blue Green Algae ◽  
Pillared Montmorillonite ◽  
Modified Montmorillonite ◽  
Eutrophic Water ◽  
Algae Growth

TiO2-pillared montmorillonite is successfully synthesized via sol-gel method, which is used to remove blue-green algae from water. The composite was characterized by X-ray diffraction and Scanning electron microscope. The analysis results shows that TiO2 has entered into the interlayer of montmorillonite and the d001 increases from 1.27639 nm to 1.64437 nm, and the surface charge of montmorillonite was recyanobacteriarkably raised from -41.5 mV (Fig. 1a) to +12.21 mV (Fig. 1b) mV at pH =6～8. The results of algae adsorption experiments displays the positive surface charge of modified montmorillonite was thus expected to induce the electrostatic neutralization between TiO2-pillared montmorillonite and Microcystis aeruginosa (CYANOBACTERIA) cells. When the cyanobacteria concentration is 12100 number/μL, chlorophyll content is 2.831883 mg/L, turbidity of the water is 44.2%, and TiO2-pillared montmorillonite is 0.5 g/L, the removing rate of chlorophyll and microcystis exceeds 90%, and the turbidity reduces from 44.2% to 19.1%.

scholarly journals Accelerated Weathering Increases the Release of Toxic Leachates from Microplastic Particles as Demonstrated through Altered Toxicity to the Green Algae Raphidocelis subcapitata

Toxics ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 185
Author(s):  
Márta Simon ◽  
Nanna B. Hartmann ◽  
Jes Vollertsen
Keyword(s):  
Green Algae ◽  
Model Organism ◽  
Accelerated Weathering ◽  
Antifouling Paints ◽  
Raphidocelis Subcapitata ◽  
Effect Concentration ◽  
Algae Growth ◽  
Physical And Chemical ◽  
The Impact ◽  
Uv C

Studies that evaluate the impact of microplastic particles (MPs) often apply particles of pristine material. However, MPs are affected by various abiotic and biotic processes in the environment that possibly modify their physical and chemical characteristics, which might then result in their altered toxic effect. This study evaluated the consequence of weathering on the release of toxic leachates from microplastics. MPs derived from six marine antifouling paints, end-of-life tires, and unplasticised PVC were exposed to UV-C radiation to simulate weathering. Non-weathered and weathered MPs were leached in algae growth medium for 72 h to demonstrate additive release under freshwater conditions. The model organism, green algae Raphidocelis subcapitata, was exposed to the resulting leachates of both non-weathered and weathered MPs. The results of the growth inhibition tests showed that the leachates of weathered microparticles were more toxic than of the non-weathered material, which was reflected in their lower median effect concentration (EC50) values. Chemical analysis of the leachates revealed that the concentration of heavy metals was several times higher in the leachates of the weathered MPs compared to the non-weathered ones, which likely contributed to the increased toxicity. Our findings suggest including weathered microplastic particles in exposure studies due to their probably differing impact on biota from MPs of pristine materials.

Light Downshifting ZnO-EVA Nanocomposite Greenhouse Films and Their Influence on Photosynthetic Green Algae Growth

2021 ◽  
Author(s):  
David Hiscott ◽  
Marina Cvetkovska ◽  
Md Abdul Mumin ◽  
Paul A. Charpentier
Keyword(s):  
Green Algae ◽  
Algae Growth

Effect of Four Triazine Herbicides on Growth of Nontarget Green Algae

Weed Science ◽  
1992 ◽  
Vol 40 (1) ◽  
pp. 134-142 ◽  
Author(s):  
Hiran Hiranpradit ◽  
Chester L. Foy
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Chlorophyll Content ◽  
Green Algae ◽  
Chlorella Pyrenoidosa ◽  
Scenedesmus Quadricauda ◽  
Continuous Exposure ◽  
Triazine Herbicides ◽  
Algae Growth ◽  
Selection Of

Colorimetry, nephelometry, and chlorophyll assays of cultures ofChlamydomonas reinhardtiiDangeard,Chlorella pyrenoidosaChick., andScenedesmus quadricauda(Turp.) Bréb. were used as criteria for measuring algae growth. Among the fours-triazines studied, cyprazine appeared to be the most inhibitory to algae growth, followed by atrazine > simazine > cyanazine. Stimulatory effects of cyanazine, simazine, and cyprazine on chlorophyll content ofC. reinhardtiiandC. pyrenoidosawere also observed. Cyanazine was most stimulatory on both species but simazine also showed stimulation. Cyprazine was stimulatory only toC. reinhardtiiat 0.22 μM concentration but apparently was inhibitory toC. pyrenoidosaat the same concentration. In one experiment, atrazine caused a slight stimulation inC. reinhardtii. Averaged over two consecutive experiments, however, atrazine was inhibitory. Chlorophyll content of the algae was found to be the best criterion for determining effect of the chemicals on algae growth. Continuous exposure ofC. reinhardtiiculture to the highest concentration of each of the four herbicides resulted in selection of algal lines having increased triazine tolerance.

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