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The polymerization of 10-undecenoic acid (UDA) was carried out in the presence of montmorillonite K10 clay catalyst (5% of UDA) and deionized water (2.5% of UDA) at a temperature of 250 °C in an autoclave. The UDA polymerized product is a mixture of monomer acids (47−51%), dimer acids (30−32%), and higher polymeric acids (17−23%). The present study describes the isolation of less valuable monomer acids fraction (iso-undecenoic acid) through distillation from polymerization reaction product. This monomer acids fraction was found to be a mixture of iso-undecenoic acid (93−96%) and γ-undecalactone (4−7%) when analyzed by GC-MS. Monomer acids fraction was hydrogenated to also give hydrogenated monomer acids (iso undecanoic acids). Finally, the esterification of monomer and hydrogenated monomer acids fractions were done by the reaction with different polyols like neopentyl glycol (NPG), trimethylol propane (TMP), trimethylolhexane (TMH), and pentaerythritol (PE). Physicochemical and lubricant properties of all the synthesized polyol esters were evaluated including density, kinematic viscosity, pour point, flash point, thermal stability (TGA), oxidation stability (DSC), copper corrosion, weld load, and wear. All the synthesized polyol esters were found to be suitable as hydraulic fluids and automotive lubricants base stocks. Comparatively the iso-undecenoic acid based polyol esters were showed excellent pour point, viscosity-temperature properties, and good thermal stabilities, while the iso-undecanoic acid polyol esters showed good oxidation stability.

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INTRODUCTION Jejunocolic Fistula following a blunt trauma abdomen is a rare presentation. Lack of specific symptoms and signs make diagnosis difficult and challenging. We report a case of 31 years old man presented as spontaneous Jejunocolic Fistula following a blunt abdominal trauma. Proper radiological investigations and curative surgery must be the aim in managing this rare entity.

INTRODUCTION: Ectopic breast tissue is a rare entity. It may be present at any site along the embryonic mammary streak, from axilla to valve. Having normal breast tissue, it responds to hormonal influences and is at risk of breast disease, paralleling the anatomically correct breast. Carcinoma of ectopic breast tissue much rare. Due to its rarity and low index of suspicion, it often diagnosed at later stage compared to breast cancer. We report about 45 yrs. old premenopausal lady came with complaints of a swelling below right inframammary region for 3 months. Tissue diagnosis suggested metastatic deposit from occult adenocarcinoma. Immunohistochemistry clinched the diagnosis of invasive ductal carcinoma. Subsequently patient was subjected to right modified radical mastectomy with subsequent chemo-radiotherapy and endocrine therapy.