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Sulfanilic acid catalyzed solvent-free synthesis of 1,5-benzodiazepine derivatives

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Chinese Chemical Letters 2007年第11期18卷 1305-1308页

作者： Jaiprakash N.Sangshetti Nagnnath D.Kokare Devanand B.Shinde Department of Chemical Technology.Dr.Babasaheb Ambedkar Marathwada University Aurangabad 431004.ms India Department of Chemical Technology Dr.Babasaheb Ambedkar Marathwada University Aurangabad 431004MSIndia New Drug DiscoveryWockhardt Research CentreAurangabad 431210MSIndia Department of Chemical Technology Dr.Babasaheb Ambedkar Marathwada University Aurangabad 431004MSIndia

Sulfanilic acid has been found to be an efficient catalyst for the synthesis of 1,5-benzodiazepines from o-phenylenediamine and ketones. This method is simple, effective and environmentally friendly and gives better y... 详细信息

关键词： 1,5-Benzodiazepines Sulfanilic acid catalyst Solvent free condition

ZnO-beta zeolite:As an effective and eco-friendly heterogeneous catalyst for the synthesis of benzothiazole derivatives

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Chinese Chemical Letters 2010年第4期21卷 421-425页

作者： Santosh S.Katkar Pravinkumar H.Mohite Lakshman S.Gadekar Kaluram N.Vidhate Machhindra K.Lande Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431004MSIndia Chemical Engineering and Process Development Division National Chemical LaboratoryPune 411008MSIndia

A cheap and recyclable ZnO-beta zeolite was used as catalyst for the synthesis of benzothiazole *** method provides several advantages such as environmental friendliness,short reaction times,high yields,simple work-up... 详细信息

关键词： ZnO-beta zeolite Benzothiazole Cyclocondensation Heterogeneous catalyst

[bmim]OH： An efficient catalyst for the synthesis of mono and bis spirooxindole derivatives in ethanol at room temperature

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Chinese Chemical Letters 2016年第5期27卷 714-720页

作者： Swapnil A. Padvi Yogesh A. Tayade Yogesh B. Wagh Dipak S. Dalai School of Chemical Sciences North Maharashtra University Jalgaon 425 001 MS India

A rapid and efficient, one pot synthesis of spirooxindole derivatives has been attempted by three- component reaction of isatin, malononitrile and carbonyl compound possessing a reactive c^-methylene group by using task specific ionic liquid, 1-butyl-3-methyl imidazolium hydroxide [bmim]OH as a catalyst. The important features of this methodology are straight forward route in short reaction time at room temperature and avoid any hazardous organic solvent, toxic catalyst, tedious purification step. Interestingly, this protocol is not only limited to mono-systems but also to the synthesis of newer bis- spirooxindole system. The separation of the product and reusability of the catalyst are easy with excellent yield. The [bmim]OH catalyst system could be reused up to five recycles without appreciable loss of activity.

关键词： Task specific ionic liquid [bmim]OH lsatin Spiro compounds Green synthesis

The Recursive Formulation of Particular Solutions for Some Elliptic PDEs with Polynomial Source Functions

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Communications in Computational Physics 2009年第5期5卷 942-958页

作者： J.Ding H.Y.Tian C.S.Chen Department of Mathematics University of Southern MississippiHattiesburgMS 39406USA

In this paper we develop an efficient meshless method for solving inhomogeneous elliptic partial differential *** first approximate the source function by Chebyshev *** then focus on how to find a polynomial particular solution when the source function is a *** the principle of the method of undetermined coefficients and a proper arrangement of the terms for the polynomial particular solution to be determined,the coefficients of the particular solution satisfy a triangular system of linear algebraic *** recursive formulas for the coefficients of the particular solutions are derived for different types of elliptic *** method is further incorporated into the method of fundamental solutions for solving inhomogeneous elliptic *** results show that our approach is efficient and accurate.

关键词： The method of fundamental solutions particular solution Helmholtz equation Chebyshev polynomial Laplace-Helmholtz equation convection-reaction equation

Recurrent lymphoma presenting as painless, chronic intussusception: A case report

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World Journal of Clinical Cases 2020年第2期8卷 306-312页

作者： Parker Giroux Anderson Collier Michael Nowicki Department of Pediatrics University of Mississippi Medical CenterJacksonMS 39216United States Division of Pediatric Hematology and Oncology University of Mississippi Medical CenterJacksonMS 39216United States Division of Pediatric Gastroenterology University of Mississippi Medical CenterJacksonMS 39216United States

BACKGROUND The clinical presentation of acute lymphoblastic lymphoma is highly *** prognosis is good, recurrence of disease can occur. Gastrointestinal relapse, including intussusception, is well-described but the absence of abdominal pain in this setting is *** SUMMARY We report a 13-year-old male with B-cell precursor acute lymphoblastic leukemia in remission presenting with anemia and weight loss. Examination was significant for absence of abdominal pain, but a stool sample was positive for occult blood. Pan-endoscopy was performed with colonoscopy revealing a mass filling the colonic lumen. Biopsy of the mass confirmed recurrence of recurrent Bcell lymphoma. Computed tomography scan revealed ileocolic intussusception resulting from the tumor. This case is unusual in that the patient had no abdominal pain despite the presence of *** While intestinal involvement with lymphoma has been well described in the literature, presentation as painless intussusception has not been reported. This case report highlights the wide spectrum of clinical manifestations of recurrent Bcell lymphoma involving the gastrointestinal tract, in particular the near absence of symptoms despite the finding of intussusception.

关键词： B-cell acute lymphoblastic leukemia Tumor relapse Intussusception Case report Anemia

Caspase-12 mediates carbon tetrachloride-induced hepatocyte apoptosis in mice

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World Journal of Gastroenterology 2014年第48期20卷 18189-18198页

作者： Hua Liu Zhe Wang Michael J Nowicki Division of Pediatric Gastroenterology University of Mississippi Medical Center Jackson MS 39216 United States Cancer Institute University of Mississippi Medical Center Jackson MS 39216 United States

AIM: To investigate the role of caspase-12 and its downstream targets in carbon tetrachloride (CCl4)-induced hepatocyte apoptosis.

关键词： Apoptosis Carbon tetrachloride Caspases Endoplasmic reticulum Hepatocyte Reactive oxygen species

Initial evaluations of a Gulf of Mexico/Caribbean ocean forecast system in the context of the Deepwater Horizon disaster

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Frontiers of Earth Science 2015年第4期9卷 605-636页

作者： Edward D. ZARON Patrick J. FITZPATRICK Scott L. CROSS John M. HARDING Frank L. BUB Jerry D. WIGGERT Dong S. KO Yee LAU Katharine WOODARD Christopher N. K. MOOERS Department of Civil and Environmental Engineering Portland State University Portland OR 97207 USA Geosystems Research Institute Mississippi State University MSU Science & Technology Center Stennis Space Center MS 39529 USA NOAA National Coastal Data Development Center Stennis Space Center MS 29412 USA Northern Gulf Institute Mississippi State University MSU Science & Technology Center Stennis Space Center MS 39529 USA unaffiliated retired from the Naval Oceanographic Office Stennis Space Center MS 39522 USA Department of Marine Science University of Southern Mississippi Stennis Space Center MS 39529 USA Oceanography Division Naval Research Laboratory Stennis Space Center MS 39529 USA

In response to the Deepwater Horizon （DwH） oil spill event in 2010, the Naval Oceanographic Office deployed a nowcast-forecast system covering the Gulf of Mexico and adjacent Caribbean Sea that was designated Americas Seas, or AmsEAS, which is documented in this manuscript. The DwH disaster provided a challenge to the application of available ocean-forecast capabilities, and also generated a historically large observational dataset. AmsEAS was evaluated by four complementary efforts, each with somewhat different aims and approaches： a university research consortium within an Integrated Ocean Observing System （IOOS） testbed; a petroleum industry consortium, the Gulf of Mexico 3-D Operational Ocean Forecast System Pilot Prediction Project （GOMEX-PPP）; a British Petroleum （BP） funded project at the Northern Gulf Institute in response to the oil spill; and the Navy itself. Validation metrics are presented in these different projects for water temperature and salinity profiles, sea surface wind, sea surface temperature, sea surface height, and volume transport, for different forecast time scales. The validation found certain geographic and time biases/errors, and small but systematic improvements relative to earlier regional and global modeling efforts. On the basis of these positive AmsEAS validation studies, an oil spill transport simulation was conducted using archived AmsEAS nowcasts to examine transport into the estuaries east of the Mississippi River. This effort captured the influences of Hurricane Alex and a non-tropical cyclone off the Louisiana coast, both of which pushed oil into the western Mississippi Sound, illustrating the importance of the atmospheric influence on oil spills such as DwH.

关键词： Gulf of Mexico Deepwater Horizon ocean forecasting skill assessment

Pyrolytic synthesis of graphene-encapsulated zero-valent iron nanoparticles supported on biochar for heavy metal removal

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Biochar 2022年第1期4卷 25-41页

作者： Tharindu N.Karunaratne RMOshani Nayanathara Chanaka M.Navarathna Prashan M.Rodrigo Rooban V.K.G.Thirumalai Charles U.Pittman Jr Yunsang Kim Todd Mlsna Jilei Zhang Xuefeng Zhang Department of Sustainable Bioproducts Mississippi State UniversityMis-sissippi StateMS 39762USA. Department of Chemistry Mississippi State UniversityMississippi StateMS 39762USA. Institute for Imaging&Analytical Technologies Mississippi State UniversityMississippi StateMS 39762USA

Biochar(BC)-supported graphene-encapsulated zero-valent iron nanoparticle composites(BC-G@Fe0)are promising engineering nanocomposites that can be used to scavenge heavy metal from ***,the produc-tion of BC-G@Fe0 through carbothermal reduction using biomass as a carbon source remains challenging because of biomass pyrolysis ***,we examined two carbothermal reduction routes for preparing BC-G@Fe0 using bamboo as the carbon *** first route impregnated Fe ions(Fe^(2+)/^(3+))into unpyrolyzed bamboo parti-cles initially,followed by carbonization at 600-1000℃.This process produced BC-G@Fe0 dominated by iron carbide(Fe_(3)C),which led to low heavy metal removal efficiency(i.e.,Cu^(2+)capacity ofms of BC-G@Fe0 through biomass carbother-mal reduction,which could guide the application-oriented design of multifunctional iron-BC composites for water remediation.

关键词： Bamboo Biochar Carbothermal reduction Fe3C Metallic iron Heavy metal

Enhanced degradation of organic contaminants using catalytic activity of carbonaceous structures:A strategy for the reuse of exhausted sorbents

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Journal of Environmental Sciences 2021年第1期33卷 267-273页

作者： Kalyani Mer Baharak Sajjadi Nosa.O.Egiebor Wei-Yin Chen Daniell.L.Mattern Wendong Tao Environmental Resources Engineering Department SUNY College of Ervironmental Science and ForestrySyracuseNY 13210USA Department of Chemical Engineering School of EngineeringUniversity of MississippiMS 38677-1848USA Department of Chemistry and Biochemistry University of MississippiMS 38677USA

Generation of hydroxyl radicals(·OH)is the basis of advanced oxidation process(AOP).This study investigates the catalytic activity of microporous carbonaceous structure for in-situ generation of·OH ***(BC)was selected as a representative of carbon materials with a graphitic *** work aims at assessing the impact of BC structure on the activation of H2O_(2),the reinforcement of the persistent free radicals(PFRs)in BC using heavy metal complexes,and the subsequent ***,three different biochars(raw,chemically-and physiochemically-activated BCs)were used for adsorption of two metal ions(nickel and lead)and the degradation of phenol(100 mg/L)through *** results demonstrated four outcomes:(1)The structure of carbon material,the identity and the quantity of the metal complexes in the structure play the key roles in the AOP process.(2)the quantity of PFRs on BC significantly increased(by 200%)with structural activation and metal loading.(3)Though the Pb-loaded BC contained a larger quantity of PFRs,Ni-loaded BC exhibited a higher catalytic activity.(4)The degradation efficiency values for phenol by modified biochar in the presence of H2O_(2) was 80.3%,while the removal efficiency was found to be 17%and 22%in the two control tests,with H2O_(2)(no BC)and with BC(no H2O_(2)),***,the work proposes a new approach for dual applications of carbonaceous structures;adsorption of metal ions and treatment of organic contaminants through in-situ chemical oxidation(ISCO).

关键词： Biochar Graphitic carbons Persistent free radicals(pfrs) Advanced oxidation process(aop) Hydrogen peroxide Phenol