DABCO-catalyzed esterification of -pivaloyl-activated amides.

A previously elusive organocatalytic protocol for the esterification of amides is disclosed. DABCO (10 mol%) is identified as an effective catalyst for the esterification of -pivaloyl amides. Although -pivaloyl amides are nearly planar (amide bond twist () = 4.

Amidic resonance not a barrier for transamidation of -pivaloyl activated amides: catalyst, base and additive free conditions.

Transamidation of twistless (twist angle () = 4.54°) and resonance stabilized -pivaloyl activated amides is demonstrated in the absence of a catalyst, base and additive. Furthermore, C-N (1.

Mosquitocidal effect of monoterpene ester and its acetyl derivative from Blumea mollis (D. Don) Merr against Culex quinquefasciatus (Diptera: Culicidae) and their insilico studies.

The present study was conducted to assess the mosquitocidal efficiency of compound isolated from Blumea mollis (D. Don) Merr against Culex quinquefasciatus. Eggs and larvae of Cx.

Privacy Protection of Patient Medical Images using Digital Watermarking Technique for E-healthcare System.

Background: Privacy protection has been a critical issue in the delivery of medical images for telemedicine, e-health care and other remote medical systems.

Objectives: The aim of this proposed work is to implement a secure, reversible, digital watermarking technique for the transmission of medical data remotely in health care systems.

Methods: In this research work, we employed a novel optimized digital watermarking scheme using discrete wavelet transform and singular value decomposition using cuckoo search algorithm based on Lévy flight for embedding watermark into the grayscale medical images of the patient.

Effect of tiliamosine, a bis, benzylisoquinoline alkaloid isolated from Tiliacora acuminata (Lam.) Hook. f. & Thom on the immature stages of filarial mosquito Culex quinquefasciatus say (Diptera: Culicidae).

The present study was aimed to check the mosquitocidal activity of tiliamosine isolated from Tiliacora acuminata (Lam.) Hook. f.

Bilateral spontaneous salivary otorrhoea: Case report and a review of the literature.

Spontaneous salivary otorrhoea is an extremely rare clinical entity. Most of the times, salivary otorrhoea results from various forms of trauma. It has also been attributed to the patent foramen of Huschke, and fissures of Santorini.