Rubina Bansal

Differential Chemical Compositions of the Essential Oils of the Shoot Organs, Rhizomes and Rhizoids in the Turmeric Curcuma longa Grown in Indo-Gangetic Plains

The turmeric Curcuma longa cv Roma plants grown at 26,000 plants per hectare were harvested at the age of 16 months and separated into leaf laminas, petioles, stem, inflorescence, primary and secondary rhizomes and rhizoids. These organs were hydrodistilled separately to obtain essential oils which were characterized by GC and GC-MS analyses; 15 terpenoids could be identified. On average basis, a plant of C. longa cv Roma yielded about 7.72 g oil; about 2 g from leaves, 2 g from rhizoids and 3.5 g from rhizomes. About 26,000 plants could be accomodated in a hectare of land. The stem, rhizome and rhizoid essential oils were similar in composition. The rhizome essential oils were highly rich in a- and ß-turmerones (40.8 %), myrcene (12.6 %), 1,8-cineole (7.7 %) and p -cymene (3.8 %). The leaf petiole and lamina essential oils were rich in myrcene (35.9 %), 1,8-cineole (12.1 %) and p -cymene (21.7 %). This oil contained turmerones but in lower concentrations.

Method for annual cropping of Pelargonium graveolens for rose scented geranium essential oil in subtropical agroclimates

Summary A method is described for the multiplication of planting material of rose scented geranium Pelargonium graveolens ‘Bipuli’, which yields Reunion Island quality essential oil, under the agroclimatic conditions of the north Indian plains. The plantlets generated from stem cuttings were planted in the field blocks using crop densities varying from 17,000 to 125,000 plants per hectare in February. The top shoots were harvested in May and the ratoon crop was fully harvested at the end of June. Two harvests from treatments in which there were 71,000 plants per hectare gave about 95.kg essential oil per hectare in the ratio of 1.7:1 in the first and second harvests. The quality of essential oil produced had a rhodinol content of 70% in which the citronellol to geraniol ratio is 1.7. These results demonstrate that the adoption of geranium cultivation will allow crop rotations such as rice/pigeon pea-potato-geranium for large economic gains per hectare, in subtropical agroclimates.

Conjunctival impression cytology in computer users.

INTRODUCTIONnIt is known that the computer users develop the features of dry eye.nnnOBJECTIVEnTo study the cytological changes in the conjunctiva using conjunctival impression cytology in computer users and a control group.nnnMATERIALS AND METHODSnFifteen eyes of computer users who had used computers for more than one year and ten eyes of an age-and-sex matched control group (those who had not used computers) were studied by conjunctival impression cytology.nnnRESULTSnConjunctival impression cytology (CIC) results in the control group were of stage 0 and stage I while the computer user group showed CIC results between stages II to stage IV. Among the computer users, the majority ( > 90 %) showed stage III and stage IV changes.nnnCONCLUSIONnWe found that those who used computers daily for long hours developed more CIC changes than those who worked at the computer for a shorter daily duration.

Isospin effects on pt-differential flow in heavy ion collisions at intermediate energies

This paper aims to study the role of isospin degree of freedom in heavy-ion collisions through the transverse momentum (pt), neutron to proton ratio and system mass dependence of pt-differential transverse flow. Our study shows that (pt)-differential transverse flow dependence can act as sensitive probe to study symmetry energy and its density dependence compared to the energy of vanishing flow. Symmetry energy and its density dependence play a dominant role over the isospin-dependence of nucleon–nucleon cross-section at Fermi energy.

Assessment of multifragmentation under the effect of symmetry energy

We study the effect of symmetry energy on the fragment production for the reactions 20 10 Ne10+ 20 10 Ne10 and 197 79 Au118 + 197 79 Au118 for the incident energy range of 50–1000 MeV/nucleon using isospin-dependent quantum molecular dynamics (IQMD) model. Our study shows that the density-dependent symmetry energy plays a significant role in multiplicity of fragments produced at low energy. Moreover, sensitivity of density-dependent symmetry energy decreases with increase in neutron content of colliding system. We also compare the symmetry energy suggested by different groups. A comparative study of experimental results with theoretical calculations of IQMD shows that the density-dependent symmetry energy is a good probe to explain the multiplicity of the fragments at low energy.

Isospin effects on fragmentation in heavy ion collisions

We study the ratio of various intermediate mass fragment (IMF) (3 ≤ Z ≤ 8) observed in the reactions of 50124Sn74+50124Sn74 and 50112Sn62+50112Sn62 having different neutron to proton content at the incident energy 40 MeV/nucleon by using isospin dependent quantum molecular dynamics (IQMD) model. We show that the content of the fragment production increases with an increase in the neutron content of the colliding nuclei and decreases with an increase in the protons content.

Cavernous lymphangioma of eyelid - a rare case report.

BACKGROUNDnLymphangioma is a lymphatic malformation, a benign proliferation of lymph vessels.nnnCASEnWe hereby present a case of eyelid lymphangioma of cavernous type in a twelve year old male patient. This is a very uncommon site for this type of lymphangioma.