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Kasipandi Muniyandi,Gayathri Jagadeesan,Blassan P. George,Ashwini Lydia Manoharan,Gayathri Nataraj,Heidi Abrahamse,Parimelazhagan Thangaraj 한국식품과학회 2022 Food Science and Biotechnology Vol.31 No.13
A rich source of nutrients, figs have a number of clinically validated benefits. This study aimed to evaluate the in vitro simulated gastrointestinal digestion, and the antidiabetic and anticancer activity of Ficus microcarpa (FMP) and F. racemosa (FRP) fruits polysaccharides. The pre-digested FMP revealed higher sugar content (721 ± 14.81 mg glucose equivalents/g sample) than FRP. After in vitro digestion, isolated fruit polysaccharides showed effective uptake with over 80% sugar loss. Free radicals and enzymatic inhibition after gastric digestion have been significantly modified, demonstrating the effective absorption of FMP and FRP through the intestine. Conversely, after the continuous digestion, the nutritional content of the isolated polysaccharides was gradually decreased compared to the pre-digested sample. At 30 µg/mL concentration of FMP and FRP was inhibited by 50% of breast cancer cells. The present study reveals the potential uptake of FMP and FRP as nutritional supplements in the future.
( Saravanan Kasipandi ),조재민,배종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Aromatics, particularly p-xylene (pX), has been considered as an important building block for terephthalic acid synthesis that can be used as monomer for polyester and polyethylene terephthalate. In the present study, the SBA-15 supports calcined at the temperature range of 500-900 °C (denoted as SBA-15(500-900)) were modified with zirconium phosphate (ZrP) and they were used for the production of pX from 2,5-dimethylfuran (DMF) with gaseous ethylene through cycloaddition reaction. The ZrP grafted on SBA-15(500) (ZrP-SBA-15(500)) displayed a maximum 89% DMF conversion with 95% pX selectivity, which was significantly higher than the ZrP on the SBA-15(900). The high catalytic performance for pX production on the ZrP-SBA-15(500) is attributed to the formation of different surface active ZrP species from in-situ reaction of both Zr and P precursors on the different silanol groups on the SBA-15(500) with an enhanced acid sites as well.
( Saravanan Kasipandi ),배종욱 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
The biorefinery is an important approach for the current needs of energy and chemical building block syntheses. 5-hydroxymethylfurfural (HMF) is considered an important renewable building block for the production of levulinic acid and furan derivatives due to its potential availability from carbohydrates such as glucose and sucrose. In the present study, mesoporous zirconium phosphate catalysts (ZP) have been used for the synthesis of HMF from carbohydrates in aqueous media. ZP prepared hydrothermally using P123 as structure-directing agent, calcined at 500-800℃. HRTEM image reveals the presence of worm like highly monodispersed pores. BET surface area and total acid sites of ZP catalyst decreased with increasing calcination temperatures, and calcination temperatures have strong influences on the catalytic activity of ZP. The ZP catalyst, calcined at 600℃, showed ~86% conversion of glucose with maximum HMF yield (~52%) at 155℃ within 6 h seems to be beneficial for HMF synthesis.
Cho, Jae Min,Kasipandi, Saravanan,Park, Yong Min,Bae, Jong Wook Elsevier 2019 Fuel Vol.239 No.-
<P><B>Abstract</B></P> <P>The positive effects of zirconium phosphate (ZrP)-modified highly ordered mesoporous KIT-6 support for an insignificant aggregation of the supported cobalt nanoparticles (CoZrP/KIT-6) were investigated by CO hydrogenation to hydrocarbons such as Fischer-Tropsch synthesis (FTS) reaction. The roles of the newly formed ZrP phases on the KIT-6 were mainly explained in terms of metal dispersion with its modulated metal-support interaction as well as suppressed coke formations. The mesoporous KIT-6 surfaces modified with partial ZrP nanoparticles at an optimum molar ratio of P/Zr = 0.2 significantly enhanced the catalytic stability with a higher C<SUB>5+</SUB> selectivity through the preferential formations of the spatial confined cobalt nanoparticles in the matrices of the well-dispersed ZrP nanoparticles on the mesoporous KIT-6 surfaces. The superior catalytic activity and stability were mainly attributed to the inhibited aggregations of the intimately interacted cobalt nanoparticles in the ZrP matrices due to a preferential presence of the highly dispersed and thermally stable hydrophobic ZrP phases. This was also responsible for the less formation of coke precursors such as cobalt carbides or heavy wax hydrocarbons. However, the different types of coke precursors on the used CoZrP/KIT-6 largely altered the catalytic stability and activity with the simultaneous aggregations of cobalt nanoparticles by forming the abundant heavy hydrocarbons on the unstable CoZrP(2)/KIT-6 prepared at a higher P/Zr ratio of 2 as well as by forming the inactive coke-derived cobalt carbides on the unmodified CoZrP(0)/KIT-6 and Co/KIT-6 under the reductive FTS reaction condition.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Positive effects of zirconium phosphate (ZrP)-modified KIT-6 were investigated by CO hydrogenation to hydrocarbons. </LI> <LI> Enhanced stability was originated from spatial confined cobalt nanoparticles in the thermally stable ZrP matrices. </LI> <LI> Highly dispersed and thermally stable hydrophobic ZrP phases are responsible for a less coke formation. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>