Statistical analysis of the physico–chemical data on the coastal waters of Cochin

2003 ◽  
Vol 5 (2) ◽  
pp. 324-327 ◽  
Author(s):  
C. S. Padmanabha Iyer ◽  
Manonmani Sindhu ◽  
Savita G. Kulkarni ◽  
Sanjeev S. Tambe ◽  
Bhaskar D. Kulkarni
Keyword(s):  
Statistical Analysis ◽  
Coastal Waters ◽  
Chemical Data ◽  
Physico Chemical

The Toxic Action of Copper and Mercury Salts Both Separately and When Mixed on the Harpacticid Copepod, Nitocra Spinipes (Boeck)

1948 ◽  
Vol 25 (3) ◽  
pp. 270-275
Author(s):  
H. BARNES ◽  
F. A. STANBURY
Keyword(s):  
Sea Water ◽  
The State ◽  
Toxic Action ◽  
Chemical Data ◽  
Physico Chemical ◽  
Mercury Salts

1. The results are given of the poisoning of Nitocra spinipes (Boeck) by copper and mercury salts used together and separately. 2. The state of copper and mercuric salts in sea water is examined using the available physico-chemical data. 3. The results suggest that the two poisons act in a different manner and possible reasons for this are considered. 4. The striking synergic effects obtained when the two metals are used together are considered to support the suggestion in 3 above and various possible explanations, both biological and chemical for this synergism, are examined.

Assessment of Heavy Metals Content in the Proximity of a Contaminated Site From Cluj-Napoca (Romania)

2020 ◽  
Vol 65 (2) ◽  
pp. 17-37
Author(s):  
Georgiana Grosu ◽  
◽  
Carmen Andreea Roba ◽  
Ramona Bălc ◽  
Maria Lucia Bizău-Cârstea ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Statistical Analysis ◽  
Multivariate Statistical Analysis ◽  
Sediment Contamination ◽  
Contaminated Site ◽  
Pollution Indices ◽  
Chemical Parameters ◽  
Multivariate Statistical ◽  
Water And Sediment ◽  
Physico Chemical

The present study was conducted in the proximity of a contaminated site from Cluj-Napoca city (Cluj County, Romania), where metal processing activities have been carried out for decades. Metal content and physico-chemical parameters were analyzed in soil, water and sediment samples, while organic matter (OM) and total organic carbon (TOC) was additionally analyzed for the soil samples. The sources of heavy metals were evaluated based on multivariate statistical analysis, while the soil and sediment contamination degree was assessed based on specific pollution indices. The calculated indices indicated a significant pollution with Cd and Pb, which may represent a risk if the area would become a residential area. Keywords: heavy metals, contaminated site, soil pollution indices, multivariate statistical analysis, Cluj-Napoca

The physico-chemical data base

2007 ◽  
pp. 271-287 ◽  
Author(s):  
P. Buurman ◽  
F. Bartoli ◽  
A. Basile ◽  
G. Füleky ◽  
E. Garcia Rodeja ◽  
...  
Keyword(s):  
Data Base ◽  
Chemical Data ◽  
Physico Chemical

Catalytic activation and application of micro-spherical carbon derived from hydrothermal carbonization of lignocellulosic biomass: statistical analysis using Box–Behnken design

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102680-102694 ◽  
Author(s):  
Z. Z. Chowdhury ◽  
S. B. Abd Hamid ◽  
Md. M. Rahman ◽  
R. F. Rafique
Keyword(s):  
Activated Carbon ◽  
Statistical Analysis ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Hydrothermal Carbonization ◽  
Corchorus Olitorius ◽  
Box Behnken Design ◽  
Catalytic Activation ◽  
Spherical Carbon ◽  
Physico Chemical

Activated carbon was produced by physico-chemical activation of hydrothermally carbonized dried stem derived from Corchorus olitorius, commonly known as Jute (JS), using potassium hydroxide (KOH) as an activation agent.

Notizen: Marginalin, a Substance from the Pygidial Glands of Dytiscus Marginalis (Coleoptera): Molecular Associations with Polyamines in vitro

1990 ◽  
Vol 45 (10) ◽  
pp. 1455-1456 ◽  
Author(s):  
Michel Barbier
Keyword(s):  
Defensive Secretion ◽  
Biological Properties ◽  
Chemical Data ◽  
Pygidial Glands ◽  
Molecular Associations ◽  
Water Beetle ◽  
Physico Chemical ◽  
Biological Interest

Marginalin, a product previously isolated from the pygidial glands of the water-beetle Dytiscus marginalis (Coleoptera), strongly reacts in vitro to form complexes with polyamines of biological interest. With spermin and spermidin, this interaction is specific giving 1:1 complexes which were isolated and studied (physico-chemical data). The results so far observed are discussed in relationship with the known biological properties of spermin and spermidin and the significance of marginalin in the defensive secretion of the beetle

scholarly journals Seasonal distribution and population dynamics of limnic microalgae and their association with physico-chemical parameters of river Noyyal through multivariate statistical analysis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Pandian Suresh Kumar ◽  
Jibu Thomas
Keyword(s):  
Statistical Analysis ◽  
Multivariate Statistical Analysis ◽  
Sampling Site ◽  
Principal Component ◽  
Environmental Parameters ◽  
Diversity Indices ◽  
Population Diversity ◽  
Chemical Parameters ◽  
Multivariate Statistical ◽  
Physico Chemical

Abstract The present investigation embarks on understanding the relationship between microalgal species assemblages and their associated physico-chemical parameter dynamics of the catchment region of river Noyyal. Totally, 142 microalgae cultures belonging to 10 different families were isolated from five different sites during four seasons and relative percentage distribution showed that Scenedesmaceae (36.6%) and site S1 (26.4%) with predominant microalgae population. Diversity indices revealed that microalgae communities were characterized by high Hʹ index, lower Simpson dominance, and Margalef index value with indefinite patterns of annual variations. Results showed that variation in the physico-chemical parameters in each sampling site has its impact on the microalgae population during each season. Multivariate statistical analysis viz., Karl Pearson’s correlation coefficient, principal component analysis, and canonical correspondence analysis were applied on microalgae species data, to evaluate the seasonal relationship between microalgae and physico-chemical parameters. The findings of our study concluded that the physico- chemical parameters influenced the dominant taxa of microalgae Chlorellaceae, Scenedesmaceae and Chlorococcaceae in river Noyyal and gives a base data for the seasonal and dynamic relationship between environmental parameters and microalgae population.

scholarly journals Sensoryal and Physico-chemical Analysis of Curd Used for Cheese Production

2012 ◽  
Vol 69 (2) ◽  
Author(s):  
Mirela JIMBOREAN ◽  
Dorin Å¢IBULCÄ‚ ◽  
Adriana PÄ‚UCEAN
Keyword(s):  
Statistical Analysis ◽  
Chemical Analysis ◽  
Water Content ◽  
Dry Matter ◽  
Chemical Characteristics ◽  
Physico Chemical ◽  
Taste And Smell ◽  
Cheese Production

The present work aim was to assess the sensorial characteristics (colour, taste and smell) and also the physico-chemical characteristics (acidity, fat, dry matter and water content) of ripened curd. A total of 100 samples of curd were analyzed. The curd samples were collected seasonally, 25 samples each season. The obtained data were subjected to statistical analysis.

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