Determination of chlorophyll a in fresh waters using the whole-water technique

1994 ◽  
Vol 16 (7) ◽  
pp. 795-808
Author(s):  
V. Vyhnálek
Keyword(s):  
Chlorophyll A ◽  
Fresh Waters ◽  
Whole Water

Micellar enhanced spectrofluorometric determination of chlorophyll a and chlorophyll b in fresh waters☆

Talanta ◽  
1992 ◽  
Vol 39 (3) ◽  
pp. 195-200 ◽  
Author(s):  
Jose J. Santana ◽  
MaryAnn Gunshefski ◽  
James D. Winefordner
Keyword(s):  
Chlorophyll A ◽  
Chlorophyll B ◽  
Fresh Waters ◽  
Spectrofluorometric Determination

scholarly journals The Identification of Fishing Ground Area with MODIS Satellite Image (Case Study: South Coast of West Java)

2018 ◽  
Author(s):  
Ketut Wikantika
Keyword(s):  
Chlorophyll A ◽  
Satellite Image ◽  
South Coast ◽  
Data Conversion ◽  
Fishing Ground ◽  
West Java ◽  
Water Region ◽  
Computation Data

According to UNCLOS, Indonesian marine territorial covers an area equal to around 2.8 million square kilometers inner archipelagic seas. Though the Indonesian water region is very wide, the resource within it is not yet been exploited optimally. Indonesia still has problems that have to be copped with, including identification of marine fishing ground areas. This report proposes a technology to make the fish-catching be more efficient and effective with the help of MODIS satellite image in term of Surface Temperature and chlorophyll-a computation. Data conversion from digital number to Water Brightness Temperature are performed. The determination of potential fishing ground area were conducted based on temperature and chlorophyll-a parameters which serve as an indicator of upwelling and observations were carried out on parameters which show this phenomenon. Based on the result, during May 2004 the upwelling process were not happened yet, and it seems to occur in June 2004. It showes by the decreasing of water temperature in South Coast of West Java particularly between the border of West Java and Central of Java. This phenomenon acts as an indicator for the raising of primer productivity and will takes about one month after upwelling to the bloom of phytoplankton.

scholarly journals PHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN ALGAL CULTURES OF CHLORELLA VULGARIS AND SYNECHOCYSTIS SALINA (MESOPHILIC AND ANTARCTIC ISOLATES) OCCURING AFTER TREATMENT WITH UV-B RADIATION

2017 ◽  
pp. 73-82
Author(s):  
Dilyana Doneva ◽  
Juliana Ivanova ◽  
Lyudmila Kabaivanova
Keyword(s):  
Oxidative Stress ◽  
Chlorophyll A ◽  
Chlorella Vulgaris ◽  
Markers Of Oxidative Stress ◽  
Protective Strategies ◽  
The Antarctic ◽  
Antarctic Algae ◽  
Β Carotene ◽  
Stimulation Of

Determination of biomass production and viability of algal cells of Chlorella vulgaris and Synechocystis salina exposed to UV-B radiation were carried out in this study together with comparison of the mesophilic and antarctic isolates of both investigated strains. Estimation of the content of the pigments: chlorophyll a, chlorophyll b, β-carotene, C-phycocyanin and allo-phycocyanin in algal cells exposed to UV-B radiation was also accomplished. The obtained results showed that the antarctic algae are more resistant to oxidative stress than their mesophilic counterparts. The antarctic isolates of Ch. vulgaris and S. salina compared with the mesophilic ones - up to 72 h showed tolerance to low exposures of radiation, expressed in a slight stimulation of growth and viability of the cells. Antarctic isolates also showed greater resistance to low doses of UV-B radiation manifested by stimulation of the synthesis of chlorophyll a and β-carotene. The registered increase in the amount of C- and allo-phycocyanin in antarctic isolates of S. salina showed that they had developed protective strategies against UV-B radiation by increasing the concentration of the phycobiliproteins. As a result of increased UV-B background, in antarctic isolates, stronger antioxidant defence mechanisms are triggered, which proved the possibility of using them as markers of oxidative stress.

Turbidity Effect on the Fluorescence Determination of Chlorophyll-a in Water

2014 ◽  
Vol 522-524 ◽  
pp. 60-63 ◽  
Author(s):  
Jian Sheng Cui ◽  
Peng Yi Lv
Keyword(s):  
Particulate Matter ◽  
Chlorophyll A ◽  
Fluorimetric Determination ◽  
Water Turbidity ◽  
Fluorescence Determination ◽  
Suspended Particulate ◽  
On Line ◽  
Line Detector ◽  
Strong Scattering

The effect of turbidity on the determination of chlorophyll a by laboratory fluorometry-RF5301-Spectrofluorophotometer and online fluorescence instrumentthe On-line Detector for Seawater' chlorophyll were investigated.Using the RF5301-Spectrofluorophotometer determined the fluorescence intensity value of chlorophyll a with different turbidity,using the On-line Detector for Seawater' chlorophyll determined the chlorophyll a concentration with the different turbidity Microcystis aeruginosa samples and water samples.Analyzed the turbidity effect on fluorimetric determination results of chlorophyll a.Researches showed that when the water turbidity was large, due to the strong scattering effect of suspended particulate matter the chlorophyll a determined by fluorometry were on the high side.

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