تحریم خمر - طب جدید كے تناظر میں

It has been held since ages that wine is a panacea for mankind in the realm of medicine. Moreover, it is touted with emphasis that it is a great source of mental and physical solace and satisfaction and for this very reason masses in the days of ignorance, in general, would have it with relish for solace and satisfaction. Even in the contemporary advanced times, it is believed in general, that wine is the source of various medical benefits coupled with the belief that wine releases tension and stress. Under the same impression, wine is drunk, with relish in Europe and America down to this day. Modern medical science has proved all these nations as categorically wrong and baseless and has set forth that all these notions about wine are based on assumptions and abstractions with nothing concrete and solid. In the assay under consideration, the harmful and baneful influence and effects of wine have been brought under the lime light and proved, in the light of the experiments of the medical scientists, that no medical benefits, whatsoever, be derived from drinking wine rather it has detrimental impacts and that it creates mental unrest instability rather than providing the drinker with solace, ease and satisfaction

Effect of Ion Beam Implantation Ofn Morphological, Electrical and Optical Properties of Polymer

In recent years, the demand of polymers is growing progressively in a wide variety of fields extending from everyday life to medical and high technological applications due to their unique inherent properties like lightweight, flexibility, weather and corrosion-resistance and low cost. Considering the bulk properties of polymer an effort has been made to modify the structural, morphological, electrical and optical properties of near-surface layer of polymer by ion implantation. Indeed, it is a useful technique to modify surface properties of polymers without altering their bulk properties. In particular, with an improvement in electrical conductivity the implanted polymer can be utilized as a promising candidate for its future utilization in the field of plastic electronics. In the present study, the effects of 400 keV C+, Cr+ and Ag+ ion implantation on Polymethylmethacrylate (PMMA) have been examined at different ion fluences ranging from 5x1013 to 5x1015 ions/cm2. The ion penetration depths have been estimated with the help of SRIM simulation. The chemical and structural modifications in implanted PMMA are examined by Fourier Transform Infrared and Raman Spectroscopy (FTIR), respectively. The surface topographical examination of the implanted polymer has been performed using Atomic Force Microscope (AFM). The effects of ion implantation on electrical and optical properties of PMMA have been investigated by four probe apparatus and UV–Visible spectroscopic analysis. The FTIR spectra confirmed the formation of C = C bonds in C+ and Cr+ implanted PMMA at a fluence of 5 × 1015 ions/cm2 while for Ag+ implanted PMMA the peak for C=C is developed at relatively lower fluence of 1 × 1015 ions/cm2. Moreover, the Raman spectra justified the growth of sp2 carbon clusterization and transformation of C+, Cr+ and Ag+ implanted layer of PMMA into quasi-continuous amorphous carbon at implantation fluence of about ≥5x1014 ions/cm2. The AFM images showed the topographical modification due to ion implantation on PMMA. However, the extent of modification depends on the type of ions and increase in ion fluence. The roughness analysis revealed the smoothness of the surface of C+ and Cr+ implanted PMMA with increasing ion fluence. On the other hand, the implantation of Ag+ ions showed dominant effects on the surface of PMMA rather than C+ and Cr+ implantation. As a result, the surface of Ag+ implanted PMMA became rougher due to the formation of nano-hillocks and nano sized grainy structures above the surface. Due to ion-induced structural modifications the electrical conductivity of PMMA is increased to semiconducting range with a rise in ion fluence. After C+ ion implantation the electrical conductivity of PMMA is increased from 2.14 × 10-10 S/cm (pristine) to 1.46 × 10-6 S/cm. Similarly, for Cr+ and Ag+ ion implantation the electrical conductivity has improved to 7.21 × 10-6 S/cm and 9.60 × 10-6 S/cm, respectively. The results of UV-Visible analysis also confirmed an increase in sp2 carbon clusters in implanted PMMA in the favor of other results. Due to creation of carbonaceous clusters the optical absorption spectra of PMMA exhibit a shift towards higher wavelength after C+, Cr+ and Ag+ implantation along with a significant reduction in the optical band gap energies. For C+ implanted PMMA the optical band gap is reduced from 3.13 (pristine) to 0.66 eV whereas, after Cr+ and Ag+ ion implantation it shrinks to 0.85 and 0.81 eV, respectively.