Om Prakash

Sep 24, 2024 | onlinelibrary.wiley.com | Om Prakash

1 INTRODUCTION The arithmetic theory of quadratic forms has a long and colorful prehistory ranging from mathematicians in ancient Babylon, Egypt, Greece, and India, to Fermat, Lagrange, and Gauss. In the 20th century, Ramanujan, Dickson, and Willerding initiated classifications of universal quadratic forms, that is, positive definite forms that represent all positive integers, such as the sum of four squares x 2 + y 2 + z 2 + w 2 $x^2+y^2+z^2+w^2$ .

May 6, 2024 | academic.oup.com | Om Prakash |Banaras Hindu |Anurag Kumar

The visceral leishmaniasis (VL) elimination initiative has adopted multiple public health strategies with the goal of reducing VL cases to <1 per 10 000 population at the subdistrict level in the Indian subcontinent [1]. Substantial progress has been achieved since 2005, with an approximately 90% reduction in VL incidence reported between 2015 and 2022 and no VL-related deaths reported in India since 2015 [2].

May 6, 2024 | academic.oup.com | Om Prakash |Banaras Hindu |Anurag Kumar

In an area endemic with Indian visceral leishmaniasis (VL), we performed direct xenodiagnosis to evaluate the transmission of Leishmania donovani from patients with VL–human immunodeficiency virus (HIV) coinfection to the vector sandflies, Phlebotomus argentipes. Fourteen patients with confirmed VL-HIV coinfection, with a median parasitemia of 42 205 parasite genome/mL of blood, were exposed to 732 laboratory-reared pathogen-free female P argentipes sandflies on their lower arms and legs.

Mar 25, 2024 | pubs.rsc.org | Aparna Kushwaha |Devyani Srivastava |Om Prakash |Suresh W. Gosavi

1,1'-bis-(diphenylphosphino)ferrocene appended d8- and d10-configuration based thiosquarates: The molecular and electronic configurational insights into their sensitization and co-sensitization properties for dye sensitized solar cells Three new d8- and d10-configuration based 1,1'-bis(diphenylphosphino)ferrocene (dppf) appended thiosquarates complexes with general composition [M(mtsq)2dppf] (M = Ni2+ (NiL2); Zn2+ (ZnL2) and Cd2+ (CdL2)) (mtsq = 3-ethoxycyclobutenedione-4-thiolate) have been...