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Fe3O4 nanoparticles impregnated eggshell as a novel catalyst for enhanced biodiesel production

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chinese Journal of chemical Engineering 2019年第11期27卷 2835-2843页

作者： ch.chingakham Asha David v.Sajith School of Nano Science and Technology National Institute of Technology CalicutIndia Malabar christian College CalicutIndia

Biodiesel is a green fuel which can replace diesel while addressing various issues such as scarcity of hydrocarbon fuels and environmental pollution to an extent. The high production cost of biodiesel and the recovery of the catalyst after the transesterification process are the major challenges to be addressed in biodiesel production. In the present work, a cheap and promising solid base oxide catalyst was synthesized from chicken eggshell by calcination at 900 ℃ forming catalyst eggshells(CES) and was impregnated with the nanomagnetic material(Fe3O4) to obtain Fe3O4 loaded catalytic eggshell(CES–Fe3O4). Fe3O4 nanomaterials were synthesized by co-precipitation method and were loaded in catalytic eggshell by sonication, for better recovery of the catalyst after transesterification process. CES–Fe3O4 material was characterized by Thermogravimetric analysis, X-ray diffraction, Fourier transform infrared spectroscopy, a vibrating-sample magnetometer, Brunauer-Emmett-Teller, Dynamic light scattering, and Scanning electron microscopy. Biodiesel was synthesized by transesterification of Pongamia pinnata raw oil with 1:12 oil to methanol molar ratio and 2 wt% catalyst loading for 2 h at a temperature of 65 ℃ and yields were compared. The reusability of the catalyst was studied by the transesterification of the raw oil and its catalytic activity was found to be retained up to 7 cycles with a yield of 98%.

关键词： Catalyst Biodiesel Nanoparticles Fe3O4 Impregnation Transesterification

Contrasting plant growth performance of invasive polyploid and native diploid Prosopis is mediated by the soil bacterial community

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Ecological Processes 2023年第1期12卷 193-203页

作者： Rishabh Kaushik Meesha Sharma ch.v.Ramana ch.Sasikala Maharaj K.Pandit Jealott’s Hill International Research Centre WarfieldBracknell RG426EYEnglandUK Department of Environmental Studies University of DelhiDelhi 110007India Department of Plant Sciences School of Life SciencesUniversity of HyderabadP.O.Central UniversityHyderabad 500046India Bacterial Discovery Laboratory Centre for EnvironmentInstitute of Science and TechnologyJ.N.T.University HyderabadKukatpallyHyderabad 500085India Jindal School of Environment&Sustainability OP Jindal Global UniversitySonipatHaryana 131001India

Background Soil microbial communities affect above-ground plant diversity and community composition by influencing plant growth *** studies have tested the effect of soil bacterial microbiome on growth performance of native and invasive plants,but the influence of specific bacterial isolates has not been ***,we investigated the effects of soil bacterial exclusion by soil sterilization and by inoculation of Streptomyces rhizobacterial isolates on the growth performance of native and invasive Prosopis *** Plant growth performance of invasive *** was significantly reduced when grown in sterilized soils,whereas native *** showed enhanced growth performance in the sterilized *** grown in the soil inoculated with the specific Streptomyces isolate from ***(PJ1),the growth performance of invasive *** was significantly enhanced while that of native *** seedlings was significantly ***,inoculation of *** and *** seedlings with Streptomyces isolate from the rhizosphere of native ***(PC1)had no significant effect on the growth performances either of *** or *** Our study reveals that invasive *** experiences positive feedback from the non-native soil bacterial community,while the native *** experiences negative feedback from its soil bacterial *** results provide fresh experimental evidence for the enemy release hypothesis,and further our understanding of the contrasting growth-promoting effects of differentially recruited microbial species belonging to the same genus(Streptomyces)in the rhizospheres of alien invasive and native plants.

关键词： Soil bacteria Streptomyces Invasive Prosopis juliflora Prosopis cineraria Soil microbiota

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Spectroscopic and fluorescence properties of Sm^(3+)-doped zincfluorophosphate glasses

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Journal of Rare Earths 2014年第10期32卷 918-926页

作者： v.B.Sreedhar ch.Basavapoornima C.K.Jayasankar Department of Physics Sri Venkateswara University Department of Physics National Degree and P.G. College

Optical absorption and fluorescence spectra of Sm3＋-doped zincfluorophosphate glasses with molar composition of 44P2O5＋17K20＋9Al2O3＋（30-χ）ZnF2＋χSm2O3 （χ=0.01 mol.%, 0.05 mol.%, 0.1 mol.%, 0.5 mol.%, 1.0 mol.%, 2.0 and 3.0 mol.%） referred as PKAZFSm were prepared by melt quenching technique and were characterized through Raman, absorption, emission and decay curve analysis. From the absorption spectra, Judd-Ofelt intensity parameters were determined and were used to predict radiative properties such as transition probabilities （AR, radiative lifetimes （τR）, branching ratios （βR）, effective bandwidths （△λeff） and stimulated emission cross-section （σ（λp）） for the excited 4G5/2 luminescent level. The decay curve for the 4G5/2 level was single exponential for lower concentration and became non-exponential for higher concentrations. The non-exponential nature of the decay curves of the 4G5/2 level increased with increase in Sm3＋ ions concentration accompanied by decrease in lifetime due to energy transfer processes among the Sm3＋ ions. The non-exponential decay curves was well fitted to the generalized Inokuti-Hirayama model for S=6, indicating that the energy transfer among optically active ions was of dipole-dipole interaction. The cross-relaxation mechanism responsible for the quenching of lifetimes and the effect of variation of concentration on the spectroscopic properties were also discussed.

关键词： zincfluorophosphate glasses samarium Raman spectrum optical properties fluorescence properties rare earths

Genetic screening of liver cancer:State of the art

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World Journal of Hepatology 2024年第5期16卷 716-730页

作者： Milena Peruhova Sonya banova-chakarova Dimitrina Georgieva Miteva Tsvetelina velikova Department of Gastroenterology University Hospital"Heart and Brain"Burgas 8000Bulgaria Department of Genetics Faculty of BiologySofia University"St.Kliment OhridskiSofia 1164Bulgaria Medical Faculty Sofia University St.Kliment OhridskiSofia 1407Bulgaria

Liver cancer,primarily hepatocellular carcinoma,remains a global health challenge with rising incidence and limited therapeutic *** factors play a pivotal role in the development and progression of liver *** state-of-the-art paper provides a comprehensive review of the current landscape of genetic screening strategies for liver *** discuss the genetic underpinnings of liver cancer,emphasizing the critical role of risk-associated genetic variants,somatic mutations,and epigenetic *** also explore the intricate interplay between environmental factors and genetics,highlighting how genetic screening can aid in risk stratification and early detection via using liquid biopsy,and advancements in high-throughput sequencing *** synthesizing the latest research findings,we aim to provide a comprehensive overview of the state-of-the-art genetic screening methods for liver cancer,shedding light on their potential to revolutionize early detection,risk assessment,and targeted therapies in the fight against this devastating disease.

关键词： Hepatocellular carcinoma Liver cancer Genetic screening Risk-associated genetic variants Epigenetic alterations Genetic biomarkers Circulating tumor DNA Next-generation sequencing

Morpho-anatomical and physicochemical studies of Fumaria indica(Hausskn.)Pugsley

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Asian Pacific Journal of Tropical Biomedicine 2012年第10期2卷 830-834页

作者： Prakash chandra Gupta ch v Rao University Institute of Pharmacy Chhatrapati Shahu Ji Maharaj University National Botanical Research Institute

Objective:To study morpho-anatomical characters and physicochemical analysis of Fumaria indica(***)(Hausskn.)Pugsley,(Fumariaceae),an important medicinal plant used extensively for treating a variety of ailments in various system of indigenous ***:Evaluation of the different parts of the plant was carried out to determine the morphoanatomical,physicochemical,phytochemical and HPTLC fingerprinting profile of *** and other WHO recommended methods were performed for ***:Morphoanatomical studies showed compound and pinnatifid leaf,4 to 6 cm in length,linear and oblong in shape and anomocytic arrangement of stomata,thin walled parenchymatous cells,scattered,sclerenchymatous,capped vascular bundles and radiating medullary *** studies showed foreign matter 0.2%,loss on drying 6.8%,total ash 16.77%,alcohol and water soluble extractives 8.92%and 20.26%,respectively,sugar 17.75%,starch 22.97%and tannins 2.37%.Phytochemical evaluation revealed the presence of carbohydrate,alkaloids,flavonoids,saponins,tannins and *** layer chromatography was carried out with different solvents and the best solvent system was chloroform and methanol in 80:20 ratio and revealed 12 spots with different R_f value under Uv light 366λ.Conclusions:The results of the study can serve as a valuable source of information and provide suitable standards for identification of this plant material for future investigations and applications.

关键词： Morpho-anatomy Transverse sections HPTLC Stomata Xylem Physicochemical

Hepatoprotective potential of ethanolic extract of Ziziphus oenoplia(L.)Mill roots against antitubercular drugs induced hepatotoxicity in experimental models

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Asian Pacific Journal of Tropical Medicine 2012年第4期5卷 283-288页

作者： ch v Rao AKS Rawat Anil P Singh Arpita Singh Neeraj verma Pharmacognosy and Ethnopharmacology Division National Botanical Research Institute(Council of Scientific and Industrial Research)Rana Pratap MargP.O.Box No.436Lucknow 226001Uttar PradeshIndia Department of Pharmacology Goel Institute of Pharmacy & SciencesFaizabad Road(Near Indira Canal) Lucknow 227105Uttar PradeshIndia

Objective:To evaluate the hepatoprotective potential of ethanolic(50%) extract of Ziziphus oenoplia(L.) Mill(***) root against isoniazid(INH) and rifampicin(RIF) induced liver damage in animal ***:Five groups of six rats each were selected for the *** extract at a dose of 150 and 300 mg/kg as well as silymarin(100 mg/kg) were administered orally once daily for 21 d in INH + RIF treated *** serum levels of glutamic oxaloacetic transaminase(SGOT),glutamate pyruvate transaminase(SGPT),alkaline phosphatase (SALP),and bilirubin were estimated along with activities of superoxide dismutase,catalase, glutathione S-transferase,glutathione peroxidase,and hepatic melondialdehyde formation. Histopathological analysis was carried out to assess injury to the ***:The considerably elevated serum enzymatic activities of glutamic oxaloacetic transaminase,glutamate pyruvate transaminase,alkaline phosphatase and bilirubin due to INH + RIF treatment were restored towards norma) in a dose dependent manner after the treatment with ethanolic extract of *** ***,the decreased activities of superoxide dismutase,catalase, glutathione S-transferase and glutathione peroxidase were also restored towards normal dose *** addition,ethanolic extract also significantly prevented the elevation of hepatic melondialdehyde formation in the liver of INH + RIF intoxicated rats in a dose dependent manner. The biochemical observations were supplemented with histopathological examination of rat liver ***:The results of this study slrongly indicate that ethanolic extract of *** has a potent hepatoprotective action against INH + RIF induced hepatic damage in rats.

关键词： Ziziphus oenoplia(Rhamnaceae) Rifampicin Isoniazid Hepatotoxicity

Laser-Heated Diamond-Anvil Cell (LHDAC) in Materials Science Research

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Journal of Materials Science & Technology 2003年第6期19卷 518-525页

作者： N.v.chandra Shekar P.ch.Sahu K.Govinda Rajan Materials Science Division Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 Tamil Nadu IndiaMaterials Science Division Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 Tamil Nadu IndiaMaterials Science Division Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 Tamil Nadu India

Laser-heated diamond-anvil cell (LHDAC) is emerging as the most suitable, economical and versatile tool for the measurement of a large spectrum of physical properties of materials under extreme pressure and temperature conditions. In this review, the recent developments in the instrumentation, pressure and temperature measurement techniques, results of experimental investigations from the literature were discussed. Also, the future scope of the technique in various avenues of science was explored.

关键词： Laser heating Diamond-anvil cell High pressure-high temperature Materials synthesis,Melting phenomena Phase equilibria

Pharmacognostic studies of the leaves and stem of Careya arborea Roxb.

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Asian Pacific Journal of Tropical Biomedicine 2012年第5期2卷 404-408页

作者： Prakash chandra Gupta Nisha Sharma ch v Rao University Institute of Pharmacy Chhtrapati Shahu Ji Maharaj University Pharmacognosy and Ethnopharmacology Division National Botanical Research Institute

Objective:To study detailed pharmacognostic profile of leaves and stem of Careya arborea(C. arborea) Roxb.(Lecthyidaceae),an important medicinal plant in the Indian system of medicine. Methods:Leaf and stem samples of *** were studied by macroscopical,microscopical, physicochemical,phytochemical,fluorescence analysis of powder of the plant and other methods for standardization recommended by ***:Maeroscopieally,the leaves are simple, broadly obovate in shape,acuminate apex with crenate,dentate margin,petioles(0.1-1.8 cm) long. Microscopically,the leaf showed the presence of median large size vascular bundle covered with fibrous bundle sheath,arrangement of xylem in cup shape and presence of cortical vascular bundle, patches of sclerenchyma,phloem fibers in groups and brown pigment containing cells in stem are some of the diagnostic features noted from anatomical *** microscopy of leaf revealed the presence of parenchyma cells,xylem with pitted vessels and epidermis with anisocylic *** investigations also included leaf surface data;quantitative leaf microscopy and fluorescence analysis. Physiochemical parameters such as loss on drying,swelling index,extractive values and ash values were also determined and results showed that total ash of the stem bark was about two times higher than leaf and water soluble extractive value of leaf and stem bark was two limes higher than alcohol soluble extractive *** phytochemical screening showed the presence of triterpenoids, saponins,tannins and ***:The results of the study can serve as a valuable source of information and provide suitable standards for identification of this plant material in future investigations and applications.

关键词： Careya arborea Microscopy Macroscopy Pharmacognosy Stomata Xylem Phloem Physicochemical

A review on ethnobotany,phytochemistry and pharmacology of Fumaria indica(Fumitory)

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Asian Pacific Journal of Tropical Biomedicine 2012年第8期2卷 665-669页

作者： Prakash chandra Gupta Nisha Sharma ch v Rao University Institute of Pharmacy Chhatrapati Shahu Ji Maharaj University National Botanical Research Institute

Fumaria indica(Hausskn.) Pugsley(Fumariaceae),known as "Fumitory",is an annual herb found as a common weed all over the plains of India and *** whole plant is widely used in traditional and folkloric systems of *** traditional systems of medicine,the plant is reputed for its anthelmintic,diuretic,diaphoretic,laxative,cholagoguc,stomachic and sedative activities and is used to purify blood and in liver obstruction in ethnopharmacology. The whole plant is ascribed to possess medicinal virtues in Ayurvedic and Unani systems of medicine and is also used in preparation of important Ayurvedic medicinal preparations and polyhedral liver *** review reveals that phytochemical constituents of wide range have been separated from the plants and it possesses important pharmacological activities like smooth muscle relaxant,spasmogenic and spasmolytic,analgesic,anti-inflammatory, neuropharmacological and antibacterial *** separation of hepatoprotective and antifungal constituents from this plant was also reported *** review highlights the traditional,ethnobotanical,phytochemical,pharmacological information available on Fumaria indica,which might be helpful for scientists and researchers to find out new chemical entities responsible for its claimed traditional uses.

关键词： Fumaria indica Phytochemistry Protopine Hepatoprotective