Browsing by Author "Sanjay Singh"
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Publication Ashy dermatosis-like pigmentation due to ethambutol(Medknow Publications and Media Pvt. Ltd, 2008) Neeraj Srivastava; Lakhan Solanki; Satish Chand; Rajendra Garbyal; Sanjay Singh[No abstract available]Publication Asymptomatic erythematous plaque on eyelid(Medknow Publications and Media Pvt. Ltd, 2008) Neeraj Srivastava; Lakhan Solanki; Sanjay Singh[No abstract available]Publication Bizarre, polycyclic, circinate, and floral-patterned reversible depigmentation in a patient with chronic bullous disease of childhood(2008) Lakhan Singh Solanki; Neeraj Srivastava; Satish Chand; Sanjay Singh[No abstract available]Publication Comparison of number of authors of single case reports in Indian Journal of Dermatology, Venereology and Leprology and Journal of the American Academy of Dermatology(2008) Sanjay Singh; Swastika Suvirya; Rahul Chaudhary[No abstract available]Publication Erythematous indurated swelling on nose and upper lip. Cutaneous T cell lymphoma.(2008) Neeraj Srivastava; Nitin Mishra; Sanjay SinghA 40-year-old man presented for diagnosis with nodules and plaques of the nose and upper lip, progessive over 1(1/2) years.Publication Magnetoresistance behavior of ferromagnetic shape memory alloy Ni1.75 Mn1.25 Ga(2008) S. Banik; R. Rawat; P.K. Mukhopadhyay; B.L. Ahuja; Aparna Chakrabarti; P.L. Paulose; Sanjay Singh; Akhilesh Kumar Singh; D. Pandey; S.R. BarmanA negative-positive-negative switching behavior of magnetoresistance (MR) with temperature is observed in a ferromagnetic shape memory alloy Ni1.75 Mn1.25 Ga. In the austenitic phase between 300 and 120 K, MR is negative due to s-d scattering. Curiously, below 120 K MR is positive, while at still lower temperatures in the martensitic phase, MR is negative again. The positive MR cannot be explained by Lorentz contribution and is related to a magnetic transition. Evidence for this is obtained from ab initio density-functional theory, a decrease in magnetization and resistivity upturn at 120 K. Theory shows that a ferrimagnetic state with antiferromagnetic alignment between the local magnetic moments of the Mn atoms is the energetically favored ground state. In the martensitic phase, there are two competing factors that govern the MR behavior: a dominant negative trend up to the saturation field due to the decrease in electron scattering at twin and domain boundaries and a weaker positive trend due to the ferrimagnetic nature of the magnetic state. MR exhibits a hysteresis between heating and cooling that is related to the first-order nature of the martensitic phase transition. © 2008 The American Physical Society.Publication Pseudoxanthomatous mastocytosis(2008) Neeraj Srivastava; Satish Chand; Sanjay SinghA 50-year-old woman presented with itchy, multiple, flat, yellowish, waxy papules and plaques diffusely involving her face, trunk, and upper extremities for 5 years (Fig. 1). Itching was moderate to severe in intensity and was episodic, without any identifiable aggravating or relieving factors. On rubbing the lesions with a blunt object erythema was elicited. Her ophthalmological examination was normal. Her complete hemogram was normal along with other routine investigations. Patient's slit skin smear for acid-fast bacilli and rk39 dip-stick ELISA for post-kala-azar dermal leishmaniasis were negative. Ultrasound examination of her abdomen was normal and skeletal survey showed no evidence of bony changes. Histological examination showed diffuse dense infiltrate of numerous mast cells filling up the papillary dermis and most of upper- and mid-reticular dermis. Overlying epidermis showed moderate epidermal hyperplasia and hyperpigmentation. There was sparse scattering of neutrophils within the infiltrate. Extracellular mast cells granules were also seen (Fig. 2). Diagnosis of diffuse cutaneous mastocytosis of pseudoxanthomatous variety was made. The patient was prescribed treatment in the form of H1 and H2 blockers (fexofenadine and ranitidine) and trimethylpsoralen and ultraviolet A (PUVA) photochemotherapy. After 2 months of treatment, there has been marked improvement in the appearance and itching. © 2008 The International Society of Dermatology.Publication Scientific and linguistic precision in titles of papers published as original articles in Indian Journal of Dermatology, Venereology and Leprology(2008) Sanjay Singh; Swastika Suvirya; Rahul Chaudhary[No abstract available]Publication Studies on biodegradable polymeric nanoparticles of risperidone: In vitro and in vivo evaluation(2008) Madaswamy S. Muthu; Sanjay SinghAim: The aim of this work was to develop extended-release risperidone nanoparticles for parenteral delivery (intravenous) and to reduce the dose-dependent extrapyramidal side effects of risperidone. Methods: Polymeric nanoparticles containing risperidone made of poly (ε-caprolactone) were designed by the nanoprecipitation method using polymeric stabilizers (poloxamers). The in vivo efficacy of prepared formulations and the risperidone solution was studied by administering them intravenously to apomorphine-treated mice. Extrapyramidal side effects of the risperidone and its formulations were also studied. Results: The particle size of the prepared nanoparticles ranged between 99 and 304 nm. Approximately 78-85% drug-encapsulation efficiency was achieved when risperidone was loaded at 1.7-4.1% by weight of the polymer. During in vivo studies, prepared risperidone-containing formulations showed a significant prolonged antipsychotic effect than that of risperidone solution, also having less extrapyramidal side effects. Conclusion: The prolonged effect of risperidone was obtained from the nanoparticles of risperidone administered by the intravenous route and this may improve the treatment of psychotic disorders by dose reduction. © 2008 Future Medicine Ltd.Publication Superantigens: A brief review with special emphasis on dermatologic diseases(2008) Lakhan Singh Solanki; Neeraj Srivastava; Sanjay Singh[No abstract available]Publication Unknown: Erythematous indurated swelling on nose and upper lip(2008) Neeraj Srivastava; Nitin Mishra; Sanjay SinghA 40-year-old man presented with nodules and plaques of the nose and upper lip, progessive over 1 1/2 years. © 2008 Dermatology Online Journal.