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Roy, R. K.
- Chiral Interaction in Enantiomeric and Racemic Dipalmitoyl Phosphatidylcholine Langmuir Monolayer
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Authors
Affiliations
1 Chemistry Department, Birla Institute of Technology and Science, Pilani, Rajasthan, 333 031, IN
2 Max-Planck-Institute fur Kolloid-und Grenzflaechenforschung, D-14424 Postdam/Golm, DE
1 Chemistry Department, Birla Institute of Technology and Science, Pilani, Rajasthan, 333 031, IN
2 Max-Planck-Institute fur Kolloid-und Grenzflaechenforschung, D-14424 Postdam/Golm, DE
Source
Journal of Surface Science and Technology, Vol 18, No 1-2 (2002), Pagination: 51-66Abstract
An Effective Pair Potential (EPP) theory is used to study relation between the molecular chiral structure of a phospholipid (Dipalmitoyl phosphatidyl choline; DPPC) and the shape of the mesoscopic domain composed of DPPC. It is experimentally known that the monolayers of DPPC in the condensed phase exhibit the formation of triskellion shaped domains. The curvature of the arms of the triskellions has specific handedness depending on the chirality of the constituent molecule. The study uses an equivalent description of the groups attached to the chiral center and calculates the mutual orientation of a pair of molecules (enantiomeric and racemic pairs). The pair potential is calculated using Lennard Jones potential. Also, the electrial interaction is computed using semi-empirical approach. Based on the minimum energy arrangement, the handedness of the aggregates and their pair potential are predicted. Theoretically obtained results are compared with the experimental results and also with the previously obtained coarse-grained description of the molecule. The study uses no adjustable parameter and uses the microscopic information obtained from X-ray diffraction data. It shows that the equivalent sphere description of the molecule can fairly describe the mesoscopic features of the domains such as the handedness based on the pair potential calculation.Keywords
Chiral Interaction, Monolayer, Effective Pair Potential.- Dietary Intake and Performance Status of Hospitalized Cancer Patients on Different Treatment Modalities
Abstract Views :183 |
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Authors
Affiliations
1 Department of Studies in Food Science and Nutrition, University of Mysore, Manasagangotri, Mysore -570 006, IN
2 Bharath Hospital and Institute of Oncology, Hebbal, Mysore, IN
1 Department of Studies in Food Science and Nutrition, University of Mysore, Manasagangotri, Mysore -570 006, IN
2 Bharath Hospital and Institute of Oncology, Hebbal, Mysore, IN
Source
The Indian Journal of Nutrition and Dietetics, Vol 42, No 4 (2005), Pagination: 165-177Abstract
Cancer in simple terms is an uncontrolled growth of cells. These are cells that have acquired ability to multiply and spread without restriction. Any cell tissue or organ in the body can be affected. Cancer is a set of disease states rather than a single disease with devastating impacts in terms of mortality as well as physical and psychological morbidity. The growth of a tumour leads to profound alterations of body organs and functions. As a result of this a poorly understood syndrome, "cachexia" develops. Cancer patients frequently lose body weight and anorexia is one of the prime determinants of weight loss. Pre-treatment weight loss is associated with decreased median survival and response to therapy. The three types of therapy used in the treatment of cancer are surgery, radiotherapy and chemotherapy.- Indian Cycas Under Severe Threat
Abstract Views :236 |
PDF Views:83
Authors
J. S. Khuraijam
1,
R. K. Roy
1
Affiliations
1 Botanic Garden, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, IN
1 Botanic Garden, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, IN
Source
Current Science, Vol 111, No 11 (2016), Pagination: 1756-1758Abstract
Cycads are an ancient group of plants which have survived three mass extinctions. They are dioecious, perennial, palm-like trees or shrubs with woody trunk above the ground or subterranean. They are a relict group of seed plants that evolved in the late Carboniferous or early Permian around 300 million years ago. With the ever-increasing interest in cycad taxonomy over last two decades, the number of new species of cycad has increased significantly.- Microstructure Evolution and Bonding Strength of Brazed Joint of Stainless Steel and Copper
Abstract Views :317 |
PDF Views:4
Authors
Affiliations
1 NDE & Magnetic Materials Group, CSIR - National Metallurgical Laboratory, Jamshedpur 831007, IN
1 NDE & Magnetic Materials Group, CSIR - National Metallurgical Laboratory, Jamshedpur 831007, IN