Veritas Journal of Sciences

Corrosion behaviour of mild steel in the presence of Schiff bases derived from 2-acetyl pyridine in 0.5M H2SO4

2021-03-20T12:13:49+00:00

Two heterocyclic Schiff bases namely (E)-2-(1-(2-phenylhydrazono)ethyl)pyridine (or 2- acetyl pyridine phenyl hydrazone) (2APPH) and (E)-2-(1-triazylidineethyl)pyridine (or 2- acetyl pyridine semicarbazone) (2APSC) were synthesized, characterized and their corrosion inhibition behaviour as well as mechanism of inhibition were investigated by different techniques. Structural characterization includes NMR, Mass, IR and UV-visible spectroscopy and elemental analysis. Corrosion inhibition behaviour of aforesaid compounds on mild steel in 0.5M sulphuric acid was examined by electrochemical methods including potentiodynamic polarization analysis, electrochemical impedance spectroscopy and noise studies. The mechanism of corrosion inhibition was explored and supplemented by adsorption and surface morphological studies.

Diversity of Fresh water Algal community from Cheruchakkichola, Mangad, Kerala

2021-03-20T12:30:58+00:00

By methodical censoring of biological, physical and chemical characteristics of water bodies and phytoplanktons, have been extensively used as water quality indicators. This study also aims to find out the relationship between phytoplankton population along with some Physicochemical variables. Sampling was performed in 5 sampling sites. Studies on the phytoplankton assemblages in Cheruchakkichola results 53 species belongs to six classes namely Chlorophyceae, Bacillariophyceae, Dinophyceae, Cyanophyceae and Euglenophyceae. Chlorophyceae shows progressive wealth and abundance on the study area. Cyanophyceae and Euglenophyceae were observed to least dominance. According to Nygaard and Palmer index, low supremacy of Cyanophyceae and Euglenophyceae shows that the studied ecosystem should be least organically polluted and suitable for human consumption purposes. This study indicates that biomonitoring methods can give relevant and stable results of water quality and purification assessment that can be employed to monitor the regional water quality.

Taxonomic studies on family Eriocaulaceae of Thrissur district

2021-03-21T05:54:02+00:00

The family Eriocaulaceae is revised for Thrissur district, based on field observation, literature survey and extensive herbarium studies. Seven species are reported, including one new species. Detailed descriptions, notes, and colour photoplates for species are presented.

A Robust Principal Component Biplot using ROBPCA

2021-03-21T06:48:51+00:00

The principal component biplot (PCA biplot) is a graphical tool to simultaneously visualise the scores and loadings of the principal components obtained from the classical principal component analysis. The plot is widely using in the areas of plant breeding, genetics, manufacturing industry, agriculture, etc. Unfortunately, the least-square principal component analysis is not robust to the presence of outliers in the data set and hence the principal component biplot too. The extreme observations may unduly influence the form of the first few principal components and change the actual structure of the biplot. Consequently, the inference based on this plot will be misleading when the data contain outliers. This paper introduces a robust principal component biplot based on ROBPCA method proposed by Hubert, Rousseeuw and Vanden Branden (2005). The length of a vector representing a variable is then approximately proportional to its robust standard deviation while the cosine of the angle between two variables is approximately equal to their robust correlation.

A Comparative Study of Haemoglobin and Myoglobin Sequences in Selected Primates using Blast and Cobalt

2021-03-21T07:19:26+00:00

Protein sequences of Haemoglobin (Hb) and Myoglobin (Mb) were downloaded from SWISSPROT and studied using bioinformatic tools BLAST and COBALT. It was found that Hb was much more conserved than Mb and that Human sequences should great similarity to Chimpanzees. Old World monkeys showed maximum differences. Phylogenetic trees constructed were consistent with previous studies which mapped the evolutionary route. Authors suggest a drastic overhaul of bioinformatic syllabi at practical and theory level so that students of zoology are equipped to use bioinformatic tools for their investigation in taxonomy, systematics, evolution etc.

Electrochemical Investigations of Pyridine-2-Carbaldehyde Derivatives as Potential Inhibitors against Copper Corrosion in 0.1M HNO3

2021-03-21T07:38:30+00:00

The corrosion inhibition efficiency of Pyridine-2-carbaldehyde-2-aminobenzoic acid (2PC2ABA) and Pyridine-2-carbaldehyde-3-aminobenzoic acid (2PC3ABA) on copper in 0.1M HNO₃ solution has been investigated and compared using electrochemical impedance spectroscopy, adsorption studies and potentiodynamic polarization analysis. The pyridine-2- carbaldehyde derivatives exhibited very good corrosion inhibition on copper in HNO₃ medium and the inhibition efficiency increased with the increase in concentration of the inhibitor. The adsorption of the inhibitor on the surface of the corroding metal obeys Langmuir and El-Awady adsorption isotherm for 2PC2ABA and 2PC3ABA respectively. Thermodynamic parameters (K_ads, ΔG⁰_ads) were calculated using adsorption isotherm. Polarization studies revealed that both compound act as a mixed type inhibitor.

Study the Effect of Pesticide Amended Media on Selected Bacterial Isolates from Forest Area

2021-03-21T07:48:54+00:00

Pesticide is any substance used to kill, repel or control certain forms of plant or animal life that are considered to be pests. Basically all chemical pesticides are poisons and pose deep rooted danger to the environment and humans through their persistence in nature and human tissue. Bioremediation is the evolving method for the removal and degradation of many environmental pollutants. Neonicotionoid and Organophospahate insecticides are the fastest growing classes of insecticides used in modern crop production. Thiamethoxam and Quinalphos are the two selected insecticides. Microorganisms play an important role in degrading synthetic chemicals in soil. Selected bacterial colonies such as Bacillus and Pseudomonas were isolated from the forest area (virgin soil) from Valparai, TamilNadu. These bacterial isolates are cultured on insecticides amended agar media and NA broth at different concentrations to know the bacteria population at different concentrations of pesticides. The bacterial tolerance activity is observed.

Effect of Copper Exposure on Growth in Hyacinth Bean (Lablab purpureus (L.) Sweet)

2022-03-16T16:03:43+00:00

“Heavy metals” is a general collective term, which applies to the group of metals and metalloids with atomic density greater than 4 g/cm3 or more, greater than water. Copper (Cu) is an essential element for all living organisms. Cu is released both naturally and through human activities; it is extensively spread into the environment and often causes environmental pollution. Lablab purpureus is a species of bean in the family Fabaceae. The present study was conducted to understand the effects of different concentration of copper metal stress on the morphology and physiology of Hyacinth bean. Copper stress was induced in 14-day old seedlings of uniform size with half-strength Hoagland media containing CuSO4 (10mM, 50mM, 100mM, 500mM, 1000mM, 1500mM) for a period of 14 days. Growth parameters such shoot length, root length petiole length, leaf area, plant biomass and chlorophyll estimation were carried out. All the growth parameters showed significant reduction when Cu concentration was increased. Concentration of chlorophyll a and b reduced considerably with increase in concentration of copper.

Graph Energy

2022-03-16T16:49:06+00:00

This is all about the energies of different types of graphs like simple graph, non-simple graph, bipartiate graph, complete bipartiate graph, regular graph. Through the study of the chemical molecular structure, we can construct a graph from the structure and also can find the energies of it. So, from this we can find the energies of molecular structures.

On Ageing Properties of Lifetime Distributions

2022-03-16T17:01:49+00:00

A reasonable segment of reliability theory is perpetrated to the study of failure rates, their properties, connections and applications. The present study focused on failure rate distributions and their shape properties. Failure rates of various generalizations of Lindley distribution are reviewed and the distinguishable role of DUS transformation is also discussed.

Editorial

2021-03-21T08:07:15+00:00

The year 2020 forced the entire humanity to stop and take stock of as a puny virus ravaged its way through the privileged and underprivileged without bias. Suddenly the stadiums were empty and the displays of art and culture shifted to online platforms. Humanity was forced into a dialogue on how priorities should change. Even though humankind had stepped on moon and was now travelling further afar it took one year t develop vaccines against a virus. There was a hue and cry- not against the defective social policies or lack of governance but against the delay in developing a medicine or vaccine- did science and technology fail- why was it taking so long?