The University of Calcutta is a public state university located in Kolkata , West Bengal, India established on 24 January 1857. By foundation date, it is the first institution in South Asia to be established as a multidisciplinary and secular Western style university. Within India it is recognized as a Five Star University and a Centre with Potential for Excellence by the University Grants Commission and the National Assessment and Accreditation Council. There are four Nobel laureates associated with this university: Ronald Ross, Rabindra Nath Tagore, C. V. Raman and Amartya Sen.Within all state universities all over India, this university had the highest number students who cleared the doctoral entrance eligibility exam in the science conducted by Government of India's National Eligibility Test to become eligible to pursue research with full scholarship awarded by the Government of India.It is a state-government administered urban-based affiliating and research university. It has its central campus in College Street . Its other campuses are in Rajabazar , Ballygunge , Alipore , Hazra and South Sinthi. Wikipedia.
University of Calcutta | Date: 2017-02-02
A method of preserving a harvested cultivated food can include applying a preservative composition onto a cultivated food. The preservative composition can include an amino acid, peptide having the amino acid or protein having the amino acid. The amino acid or peptide or protein having the amino acid can be associated with a water soluble substance. The water soluble substance may facilitate application of the amino acid to the cultivated food and may contribute to the improvement of preservation of the cultivated food post-harvest. A container can be configured for protecting harvested cultivated food by having a chamber with a preservative composition located the container. A substrate can include a preservative composition located on the substrate, which can be applied to a cultivated food to increase preservation.
University of Calcutta | Date: 2017-02-03
A method of preserving a harvested cultivated food can include applying a preservative composition onto a cultivated food. The preservative composition can include a folate substance or hydrogel having the folate substance in a carrier. The carrier and/or hydrogel may facilitate application of the folate to the cultivated food and may contribute to the improvement of preservation of the cultivated food post-harvest. A container can be configured for protecting harvested cultivated food by having a chamber with a preservative composition located in the container. A substrate can include a preservative composition located on the substrate, which can be applied to a cultivated food to increase preservation.
University of Calcutta | Date: 2017-02-04
A food preservation system can include a gas (e.g., oxygen) permeable package having at least one oxygen permeable member defining a package chamber therein, and a silverized biomass in the package chamber of the oxygen permeable package. Another food preservation system can include a container having an internal chamber, and an oxygen permeable divider located in the internal chamber so as to divide the internal chamber into a first chamber and a second chamber. The first chamber can being configured for receiving food therein, and a silverized biomass is located in the second chamber. A method of preserving food can include retaining a food in a container that includes silverized biomass such that the food does not contact the silverized biomass. The silverized biomass can have a combination of silver and biomass.
University of Calcutta | Date: 2017-02-03
Provided herein are chlorophyll polymers and conductive materials, sensors, and devices comprising the chlorophyll polymers, and methods of use and preparation thereof.
Chowdhury S.,University of Calcutta |
Jana D.,University of Calcutta
Reports on Progress in Physics | Year: 2016
Inspired by the success of graphene, various two dimensional (2D) structures in free standing (FS) (hypothetical) form and on different substrates have been proposed recently. Silicene, a silicon counterpart of graphene, is predicted to possess massless Dirac fermions and to exhibit an experimentally accessible quantum spin Hall effect. Since the effective spin-orbit interaction is quite significant compared to graphene, buckling in silicene opens a gap of 1.55 meV at the Dirac point. This band gap can be further tailored by applying in plane stress, an external electric field, chemical functionalization and defects. In this topical theoretical review, we would like to explore the electronic, magnetic and optical properties, including Raman spectroscopy of various important derivatives of monolayer and bilayer silicene (BLS) with different adatoms (doping). The magnetic properties can be tailored by chemical functionalization, such as hydrogenation and introducing vacancy into the pristine planar silicene. Apart from some universal features of optical absorption present in all these 2D materials, the study on reflectivity modulation with doping (Al and P) concentration in silicene has indicated the emergence of some strong peaks having the robust characteristic of a doped reflective surface for both polarizations of the electromagnetic (EM) field. Besides this, attempts will be made to understand the electronic properties of silicene from some simple tight-binding Hamiltonian. We also point out the importance of shape dependence and optical anisotropy properties in silicene nanodisks and establish that a zigzag trigonal possesses the maximum magnetic moment. We also suggest future directions to be explored to make the synthesis of silicene and its various derivatives viable for verification of theoretical predictions. Although this is a fairly new route, the results obtained so far from experimental and theoretical studies in understanding silicene have shown enough significant promising features to open a new direction in the silicon industry, silicon based nano-structures in spintronics and in opto-electronic devices. © 2016 IOP Publishing Ltd.
Sana S.S.,University of Calcutta
Decision Support Systems | Year: 2011
In this paper an integrated production-inventory model is presented for supplier, manufacturer and retailer supply chain, considering perfect and imperfect quality items. This model considers the impact of business strategies such as optimal order size of raw materials, production rate and unit production cost, and idle times in different sectors on collaborating marketing system. The model can be used in industries like textile and footwear, chemical, food, etc. An analytical method is employed to optimize the production rate and raw material order size for maximum expected average profit. An example is illustrated to study the behavior and application of the model. © 2010 Elsevier B.V. All rights reserved.
Sengupta P.,University of Calcutta
International Journal of Preventive Medicine | Year: 2013
By late 18th or early 19th century, albino rats became the most commonly used experimental animals in numerous biomedical researches, as they have been recognized as the preeminent model mammalian system. But, the precise correlation between age of laboratory rats and human is still a subject of debate. A number of studies have tried to detect these correlations in various ways, But, have not successfully provided any proper association. Thus, the current review attempts to compare rat and human age at different phases of their life. The overall findings indicate that rats grow rapidly during their childhood and become sexually mature at about the sixth week, but attain social maturity 5-6 months later. In adulthood, every day of the animal is approximately equivalent to 34.8 human days (i.e., one rat month is comparable to three human years). Numerous researchers performed experimental investigations in albino rats and estimated, in general, while considering their entire life span, that a human month resembles every-day life of a laboratory rat. These differences signify the variations in their anatomy, physiology and developmental processes, which must be taken into consideration while analyzing the results or selecting the dose of any research in rats when age is a crucial factor.
University of Calcutta | Date: 2016-04-28
Embodiments described herein provide for nanofertilizers having at least one plant nutrient coated onto a metal nanoparticle. Some embodiments provide for a method of making a nanofertilizer including providing a metal nanoparticle and coating the metal nanoparticle with at least one plant nutrient or precursor thereof. In some embodiments, a method of making a nanofertilizer may include mixing a metal salt and a plant nutrient in an aqueous medium to form a solution and adding a reducing agent to the solution to form a coated metal nanoparticle. Some embodiments provide for a boron nanofertilizer and methods of making the same. Some embodiments provide for a method of treating a plant nutrient deficiency, such as, for example, a boron deficiency. Some embodiments also provide for a kit for making a plant nutrient coated nanoparticle.
University of Calcutta | Date: 2015-04-08
Disclosed are methods for enzymatic treatment of wool using bacterial protease, cellulase, and xylanase enzymes.
University of Calcutta | Date: 2014-11-19
Methods and compositions for making carbon aerogels from biomass are disclosed. In one embodiment, a method of making a carbon aerogel from a biomass involves dielectrically heating a biomass slurry to produce the carbon aerogel. The method further includes heating the carbon aerogel to produce an electrically conducting carbon aerogel.