River histories : A thematic review

Peer reviewe

A record of stone weevil (Aubeus himalayanus Voss) (Curculionidae: Coleoptera) on ber in hot arid region of Bikaner, Rajasthan

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Not AvailableEffect of zero energy cool chamber (ZECC) along with post-harvest treatments including CaCl 2 , mustard oil and K 2 SO 4 separately on shelf-life and fruit quality attributes of Indian gooseberry or aonla (Emblica offi cinalis Gaertn) during storage under semi-arid ecosystem of Gujarat was studied. Increase in physiological loss in weight (PLW), spoilage loss, total soluble solids, total sugar and reducing sugars, reduction in titratable acidity and ascorbic acid were observed during storage period in all the treatments. Fruits treated with 1.5% CaCl 2 and stored in ZECC recorded least PLW (16%), spoilage loss (16.5%), respiratory activity (83 mg CO 2 /kg/h) and exhibited 11 days of shelf-life, while untreated control had 6 days economic life. It was closely followed by 1% CaCl 2 + ZECC treatment. Fruits stored in ZECC recorded 9 days shelf-life. Highest respiration rate was in control (88.1 mg CO 2 /kg/h) on 13th day of storage. It may be concluded that 1.5% CaCl 2 and storage in ZECC treatment was found most effi cient to retain the fruit quality attributes till 13th day of storage under semi-arid environment of western India.Not Availabl

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Not AvailableEffect of zero energy cool chamber (ZECC) along with post-harvest treatments (including CaCl2, mustard oil and K2SO4 separately) on shelf-life and fruit quality attributes of ber (Zizyphus mauritiana Lamk.) cv ‘Gola’ during storage under semi-arid ecosystem of Gujarat was studied. Increase in physiological loss in weight (PLW), spoilage loss, total soluble solids, total sugars, reducing sugar and reduction in titratable acidity, and ascorbic acid during storage were observed in all treatments. Fruits treated with CaCl2 1.5% and stored in ZECC recorded least PLW (17.1%), spoilage loss (20%), respiratory activity (0.25 mg CO2/kg/h) and exhibited 7 days of shelf-life, followed by CaCl2 1% + ZECC, while untreated fruits had 3 days of economic shelf-life. Fruits stored in ZECC recorded 6 days shelf-life. Highest respiration rate was in control (0.45 mg CO2/kg/h) on 9th day of storage. Data on fruit quality attributes indicated that ZECC + CaCl2 1.5% or ZECC alone might be an ideal on-farm storage facility for maintaining the quality of ber fruits under semi-arid environment of Western India.Not Availabl

Gold(I)-Catalyzed Hydroxy Group Assisted C(sp2)-H Alkylation of Enaminones with Diazo Compounds to Access 3-Alkyl Chromones

A strategy for expedient synthesis of 3-substituted chromones from easily available o-hydroxyarylenaminones and diazo compounds has been developed. Carefully conducted experimental and computational studies led us to propose an uncommon mechanistic pathway involving the hydroxyl group assisted alkylation of enaminones with in situ generated gold carbenes. © 2018 American Chemical Societ