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Search Results: 1 - 10 of 225079 matches for " Mehta R "
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Variabilidade genética entre isolados de Colletotrichum gossypii do algodoeiro
Mehta, Yeshwant R.;Mehta, Angela;
Summa Phytopathologica , 2010, DOI: 10.1590/S0100-54052010000100007
Abstract: cotton is attacked by colletotrichum gossypii (cg) and c. gossypii var. cephalosporioides (cgc). both the pathogens are transmitted by seed and their morphological distinction is extremely difficult and inconsistent. in the present study, attempts were made to verify the genetic variability among 53 isolates of cg and cgc using rapd-pcr, eric- and rep-pcr, as well as pcr-rflp of the its rdna region. based on pathogenicity tests, 21 isolates were classified as cg and 32 as cgc. rapd analysis was performed using eight primers and the results revealed two major groups. the first group contained 94% of the isolates originated from seeds and the second contained 95% of the isolates originated from leaves. similar results were obtained by eric- and rep-pcr, where the first group contained 93% of the isolates originated from seeds and the second contained 78% of the isolates originated from leaves. when the amplified product of the its rdna region was digested with eight restriction enzymes, similar banding patterns were observed for all isolates. results of rapd, eric- and rep-pcr demonstrated the existence of genetic variability among the seed and leaf isolates and these two groups could be clearly distinguished. further studies need to be performed using other molecular techniques in order to obtain markers that can distinguish cg and cgc isolates in infected seeds.
Amoebiasis cutis in HIV positive patient
Bumb R,Mehta R
Indian Journal of Dermatology, Venereology and Leprology , 2006,
Abstract: Protozoan infections of the skin, particularly cutaneous amoebiasis, are rare in HIV-positive patients. We report a case of amoebiasis cutis in an HIV-positive truck driver with a history of frequent unprotected sexual exposures. He presented with multiple painful ulcers and sinuses with purulent discharge, necrotic slough and scarring in the perianal and gluteal region for the last 2 years. He was positive for HIV-1 and -2. Cutaneous biopsy revealed numerous Entamoeba histolytica in the trophozoite form, in addition to an inflammatory infiltrate and necrotic debris. He responded well to oral metronidazole and chloroquine. Amoebiasis cutis should be considered in the differential diagnosis of perianal ulcers, particularly in HIV-positive patients.
Crusted Scabies in a Patient of Systemic Sclerosis
Bumb R,Mehta R
Indian Journal of Dermatology, Venereology and Leprology , 2000,
Abstract: A case of Norwegian (crusted) scabies is reported in a patient suffering from systemic sclerosis.
Congenital naevoid psoriasis
Bumb R,Mehta R
Indian Journal of Dermatology, Venereology and Leprology , 2000,
Abstract: A 1 1/2sub - year-old child who had typical linear psoriatic plaques since birth is being reported.
Oral rifampicin in cases of cutaneous leishmaniasis with multiple lesions (A pilot study)
Bumb R,Mehta R
Indian Journal of Dermatology, Venereology and Leprology , 2002,
Abstract: The multiple lesions of cutaneous leishmaniasis (CL) require an effective oral agent. We are reporting a pilot study of oral rifampicin 600 mg. bid or 20 mg/kg. body weight in cases of CL with multiple lesions. Our study shows 83.3% parasitological and clinical cure with insignificant side effects after 4 weeks of therapy. No relapse upto 6 months of completion of study was seen.
P-sets and (i)-P-sets for real function space
H. S. Mehta,R. D. Mehta
International Journal of Mathematical Analysis , 2012,
Genetic diversity among isolates of stemphylium solani from cotton
Fitopatologia Brasileira , 2001, DOI: 10.1590/S0100-41582001000400002
Abstract: the fungus stemphylium solani causes leaf blight of tomato (lycopersicon esculentum) in brazil. in recent years, severe epidemics of a new leaf blight of cotton (gossipium hyrsutum) caused by s. solani occurred in three major cotton-growing brazilian states (pr, mt and go). molecular analysis was performed to assess the genetic diversity among the s. solani isolates from cotton, and to verify their relationship with representative s. solani isolates from tomato. random amplified polymorphic dna (rapd) markers and internal transcribed spacers of ribosomal dna (rdna) were used to compare 33 monosporic isolates of s. solani (28 from cotton and five from tomato). an isolate of alternaria macrospora from cotton was also used for comparison. rapd analysis showed the presence of polymorphism between the genera and the species. the a. macrospora and the s. solani isolates from cotton and tomato were distinct from each other, and fell into separate groups. variation by geographic region was observed for the tomato isolates but not for the cotton isolates. amplifications of the its region using the primer pair its4/its5 resulted in a single pcr product of approximately 600 bp for all the isolates. similarly, when amplified fragments were digested with eight restriction enzymes, identical banding patterns were observed for all the isolates. hence, rdna analysis revealed no inter-generic or intra-specific variation. the genetic difference observed between the cotton and the tomato isolates provides evidence that s. solani attacking cotton in brazil belongs to a distinct genotype.
Molecular and pathogenic variability of Drechslera isolates from oats
Fitopatologia Brasileira , 2001, DOI: 10.1590/S0100-41582001000300002
Abstract: severe epidemics of leaf blotch and black leaf spot of oat (avena sativa) caused by drechslera avenae and drechslera sp., respectively, are frequently observed in the state of paraná, brazil. although some morphological differences between the isolates causing two different symptoms were noticed, the genetic relationship between them was not clear. twenty-four isolates of d. avenae and drechslera sp, collected between 1996-98, were assessed for the genetic variability by molecular and pathogenic analyses. the amplification products using primer pair its4/its5 showed a fragment length of approximately 600 bp for all the isolates except for one black spot isolate, where the fragment length was approximately 550 bp. restriction enzymes hinf i and taq i, that cut in the its region, produced similar restriction patterns for all the isolates, whereas four others produced variable restriction patterns. rapd analysis also showed distinctive patterns for some isolates. no clear difference between the black spot and the leaf blotch isolates was observed either by the molecular or by the pathogenicity analysis. nonetheless, the rdna analysis suggests that drechslera probably comprises at least three distinct taxa. the results indicate that the difference observed between the isolates originating from two types of symptoms is due to intra-specific variants of d. avenae.
Fullerenes: An introduction and overview of their biological properties
Thakral Seema,Mehta R
Indian Journal of Pharmaceutical Sciences , 2006,
Abstract: Ever since their experimental discovery in 1985, fullerenes have attracted considerable attention in different fields of sciences. Investigations of chemical, physical and biological properties of fullerenes have yielded promising information. Their unique carbon cage structure coupled with immense scope for derivatization makes fullerenes a potential therapeutic agent. Henceforth various potential therapeutic applications of fullerenes have been reviewed in the present paper. These include antiHIV- protease activity, photodynamic DNA cleavage, free radical scavenger, antimicrobial action and use of fullerenes as diagnostic agents.
Mania associated with multiple paraphilias
Mendhekar D,Mehta R
Indian Journal of Medical Sciences , 2006,
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