Essays on Chemistry

Total cell lysate Tetrahymena cell from 5 ml culture of the density 2.5 x 105cells/ ml were pelleted at 1700 xg, cell pellet was resuspended in 100 μl of 10 mM Tris-HCl, pH = 7.4. To lysate cells, an equal volume of hot 2.5-fold concentrated…

To investigate MtbFBA and for hit confirmation of the generated virtual hits, the protein was produced in E. coli and purified to apparent homogeneity. E. coli C41 DE3 cells containing fba in the pET-3a vector were inoculated and grown at 37 C until an OD600…

The chemomechanical debridement of the root canal has a major contribution towards the success of endodontic treatment. Not just the shaping of canal using instrumentation, irrigation also plays a prime role in eliminating pulp tissues, microbiota and their by-products, and organic and inorganic debris. Irrigants…

Introduction Aflatoxins are the type of mycotoxins that are considered to be produced by the organisms of Kingdom Fungi1. Mycotoxins are chemically unrelated groups of fungal metabolites characterized by their ability to induce a toxic response in human and animals when they contaminate food2. Aflatoxins…

Introduction Electrophilic aromatic substitutions are an important class of synthetic organic chemistry reactions, as they allow for the introduction of different functional groups onto an aromatic ring. They are reactions in which an atom, typically a proton (H+), on an aromatic ring such as benzene…

If you have ever noticed the colour of the sap extracted from rubber trees you will know that natural rubber is white. Even the vulcanized rubber used to manufacture tyres is off-white. So how come tyres are the complete opposite and black? It couldn’t be…

The decision to pursue a career in the medical field has been taken with careful consideration. It is due to my love for chemistry combined with an interest in anatomy and physiology. As I have progressed up several years in secondary school, my fascination of…

Sitara Chemical enterprises Limited was incorporated in 1981. Its starting was began by producing caustic soda in 1985. Today its producing capacity is over 600 metric tonnes a day. Sitara Chemical industry expanded which include sodium hypochlorite, bleaching powder, hydrochloric acid, and liquid chlorineand others….

Metabolites were extracted according to Lisec et al., (2006) with some modifications. Briefly, about 100 mg of each sample was taken and crushed in 100% methanol and the mixture was vortexed for 15 min. Subsequently, the tubes containing the homogenate were centrifuged at 14,000 g…

All living things are made of carbon. Carbon is also a part of the ocean, air, and even rocks. Because the Earth is a dynamic place, carbon does not stay still. It is on the move! In the atmosphere, carbon is attached to some oxygen…