Mantu Chakraborty1 , Renuka Das2 , and Sunil Kanti Mondal2*
1Department of Microbiology, Vidyasagar University, Rangamati, Midnapore, West Bengal 721102., 2Department of Biotechnology, The University of Burdwan, Golapbag, Burdwan – 713104.
Acetolactate synthase (ALS) or Acetohydroxyacid synthase (AHAS) catalyzes the first step in the synthesis of
the branched-chain amino acids i.e., valine (2-amino-3-methylbutanoic acid), leucine (2-amino-4-
methylpentanoic acid), and isoleucine (2-amino-3-methylpentanoic acid), in plants, bacteria, algae and fungi but
not in humans. AHAS is the main target enzyme for sulfonylurea active ingredients; Amidosulfuron,
Nicosulfuron and Cyclosulfuron those assist in lowering branched-chain amino acid synthesis through inhibition
to form the complex of Lactyl-ThDP(TDL) to ALS with great practical importance. Amino acid composition,
evolutionary and sequence analysis of the ALS protein from Arabidopsis thaliana and its homologous were
systematically studied. Composition analysis reveals that ALS is a soluble protein. Moreover, the phylogenetic
tree showed different clusters based on the source organism and multiple sequence alignment depicts
conservative nature in amino acid residues. Furthermore, molecular docking has been conducted to study the
interactions between ALS of Arabidopsis thaliana and TDL in presence/absence of the active ingredients of
sulfonylurea herbicide groups. Molecular docking studies confirm active ingredients are effective to inhibit the
binding of TDL to ALS. Our obtained results can be very useful to study specific protein interactions along
with developing new herbicides using computational methods. Keywords:Acetolactate synthase (ALS), Branched-chain amino acid synthesis (BCAA), Lactyl-ThDP
(TDL), Herbicide, Molecular docking.
Department of Environmental Science, University of Calcutta
Air pollution in Kolkata is not a result of only the human error and negligence but it is alsoaffected by the
meteorological factors like wind . In this rostrum we have simply discussed about the spike in the
pollutant level in certain days of the year and have tried to explain the reason with the utilization of
Hysplit Backtrajectory and Dispersion model. Keywords: Pollution, Particulate matter, Dispersion Model.
1Department of Electrical Engineering, Institute of Engineering & Management, Kolkata-700 091
2Department of Electronics & Communication Engineering, Institute of Engineering &
3Department of Computer Science & Engineering, Godavari Institute of Engineering &
Technology,Rajahmundry – 533296, Andhra Pradesh
4Department of Computer Science & Engineering, Shri G.S. Institute of Technology and Science,
Indore, Madhya Pradesh 452003
In 1918, a new influenza virus emerged. During this same time period World War I was taking place. The
conditions of World War I (overcrowding and global troop movement) helped the 1918 flu spread .
The vulnerability of healthy young adults and the lack of vaccines and treatments created a major public
health crisis, causing at least 50 million deaths worldwide. This is a data-oriented project to try to
understand the Spanish Flu outbreak of 1918 and how it can teach us valuable lessons. We studied the
death and mortality related aspects, economic impacts and how social distancing helped mitigate the
Keywords: Spanish Flu, Pandemic, Pathogen, Social Distancing, Disease.
Brajit Paul, Dibakar Roy Choudhury , Rajdeep Ray, Abhisek Roy and Sayak Banerjee
Department of Basic Science And Humanities, Institute of Engineering and Management,Sector V, Salt Lake City,
Bidhan Nagar, Kolkata, West Bengal 700091.
The review focuses on the potential use of wood lignin as a partial substitute and performance
enhancer in asphalt binders. The aim behind this reviews to fight issues like durability, strength and the
reduction in aquifer recharging. Lignin is a dead natural polymer occurring in the secondary cell wall of plant
During polymerisation, monlignols accumulate in a non uniform manner, thus leaving behind pores in the
Using this property in our asphalt binders would render roads as permeable to water. But lignin being
in nature, the material would not corrode due to water actions, unlike commonly used bitumen. Various tests
have been conducted to generate aging conditions on test using lignin as asphalt binder. All of them show
that lignin addition to binder brings stiffness. Lignin also positively effects high temperature rutting
performance, without adversely affecting low temperature. Lignin additionally also shows better recovery than
bitumen as binder. The fatigue resistance of surface is negatively affected by lignin. Basically the result of
various studies suggests that wood lignin is a promising substitution of bitumen as binder, coming
with economic savings and environmental benefits.
Keywords: Asphalt, Lignin, Bitumen
1*Department of Chemistry, Lady Brabourne College, Kolkata 700017 2 La Martiniere For Boys, Kolkata 700017.
3 4 5Department of Chemistry, Lady Brabourne College, Kolkata 700017.
Fish is a popular human food. Over two-and-a-half billion people globally obtain their daily nutrient intake
fish. In India, it is a major dietary component for over 50 percent, and is a particularly important nutrition
for the poor. Mercury is a deadly environmental pollutant, both in its elemental form and in combination with
other chemicals. When released into the environment mercury is transformed into methylmercury through
microbial action. Methylmercury is the most pernicious form of mercury. It bioaccumulates in fish and enters
human body with the consumption of contaminated fish. Fish in polluted water bodies accumulate
methylmercury – a toxic pollutant of high potency that crosses the blood brain barrier and placental barrier,
making it an intergenerational toxin. It enters the food chain both from point and non-point sources. Effluent
pipes from industrial processes often contain mercury or mercury compounds. Emissions and ash from coal-fired
power plants also contain mercury. It is well known that mercury circulates globally and deposits in water,
bioaccumulating in the food chain through algae and fish. The higher the pecking order of a fish in the food
chain, greater is the amount of mercury it is likely to contain. Advisories on fish consumption are quite common
in developed countries, especially for pregnant women. Human exposure to such toxins therefore assumes
significance. Contamination of this vital food is a key issue.In developing countries, issues like food
contamination rarely draw attention. Mere availability of food is argued to be of foremost concern. In this
scenario of poverty and hunger, system of industrial production has largely remained unaccountable to society
and the environmental pollution it causes.
Keywords: Contamination, Methyl mercury, bioaccumulation, human exposure.
1 Department of Basic Science And Humanities, Institute of Engineering and Management,Sector V,
Salt Lake City, Bidhan Nagar, Kolkata, West Bengal 700091.
1 University of Engineering & Management, Kolkata (Affiliated by UGC, AIU, AICTE, BCI)University
Area, Plot, Street Number 03, Action Area III, B/5, Newtown, Kolkata, West Bengal 700160.
Spices are an important part of our diet mainly because of their taste. They add a great taste to the prepared
Since the ancient days spices and herbs are also known for their medicinal properties because they are used for
treating various kind of illness like cough and cold, diabetes, common cold, gastric ulcer, different types of
diseases and so on. In the present days, spices are available in different forms and different kinds of non
dyes are added to it mainly to protect its texture. These non permitted dyes are harmful and can cause serious
if consumed regularly.The aim of this project is to estimate, extract and characterize the antioxidants and
molecules from spices. Not only this, the presence of artificial colours are also tested in the spices. Six
spices were taken that we use in our daily life and they are also available easily in the market. They are taken
three different forms (the organic form, the whole spice and the powdered form available in the market) for the
experiment.All the spices were treated with aqueous ethanol and polyphenols were estimated with the help of
Ciocalteau reagent. The absorbance are recorded using spectrophotometer. The presence of dye like sudan and
rhodamine are tested with the help of ethyl acetate and methanol respectively. The functional group are also
identified with the IR spectroscopy.
Keywords:Spices, Medicinal propertires, Folin CIocalteau reagent, Artificial colours.
International Journal of Chemical and Environmental Sciences (IJCAES)
Smart SocietyTM for Makers, Artists, Researchers and Technologists (SMART SOCIETYTM)
6408 Elizabeth Ave SE, Auburn 98092, Washington, USA.