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Mineralogical alteration of thermally treated siderite in air: Mossbauer spectroscopy results

Chinese Science Bulletin 1999年第18期44卷 1712-1717页

作者： Pan, YX Zhu, RX Ping, JY Chinese Acad Sci Inst Geophys Beijing 100101 Peoples R China Beijing Univ Sci & Technol Dept Phys Mat Beijing 100083 Peoples R China

Mineralogical alternation of thermally treated siderite in air atmosphere has been systematically analyzed by Mossbauer effects. It was preliminarily estimated from the area of sub-spectra that 4% , 39% and 62% of magnetite were formed at 410℃, 490℃ and 510℃ respectively. After being incrementally heated at 530℃ the spectra consist of two sextets of Fe3O4. Sextet of γ-Fe2O3 with hyperfine field of 50T was observed at 550℃. Spectra at 580℃

关键词： siderite mineralogical phase transition thermally treated in air.

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Socio-cultural factors influencing insecticide treated bed net utilization in a malaria endemic city in north-central Nigeria

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Asian Pacific Journal of Tropical Medicine 2010年第5期3卷 402-406页

作者： Jombo GTA Mbaawuaga EM Gyuse AN Enenebeaku MNO Okwori EE Peters EJ Akpan S Odey F Etukumana EA Akosu JT Department of Medical Microbiology and Parasitology College of Health SciencesBenue State UniversityPMB 102119 MakurdiNigeria Department of Biological Sciences Faculty of ScienceBenue State UniversityPMB 102119 MakurdiNigeria Department of Family Medicine College of Medical SciencesUniversity of CalabarPMB 1115 CalabarNigeria Department of Medical Microbiology College of Medical SciencesUniversity of Jos Department of Internal Medicine College of Medical SciencesUniversity of Calabar PMB 1115 CalabarNigeria Department of Medical Microbiology and Parasitology College of Medical SciencesUniversity of CalabarPMB 1115 CalabarNigeria Department of Paediatrics College of Medical SciencesUniversity of CalabarPMB 1115 CalabarNigeria Department of Family Medicine University of Uyo Teaching Hospital Department of Community Medicine College of Medical SciencesUniversity of Jos

Objective:To ascertain the socio-cultural factors influencing the rate of utilization of insecticide treated bed nets(ITNs) in a malaria endemic city of Makurdi,north central Nigeria. Methods:The study was cross-sectional in nature using systematic sampling method to identify *** quantitative and qualitative data was generated from adult women using structured and semi structured questionnaires,and focused group discussions(FGDs) to obtain information on rate and patterns of utilization of *** such as age,educational level, marital status,awareness or otherwise of the existence of malaria,and factors influencing rate of ownership and utilization of ITNs were *** were used to obtain qualitative information on rate of utilization of ITNs not captured in the *** obtained was analysed using Epi Info 6 statistical ***:Among the respondents interviewed,97.0% (2 013/2 075) were aware of existence of malaria and 87.0% of these(1 751/2 013) would associate it with *** rate of ownership of any bed net,ITNs and untreated bed nets(UTNs) was 25.1% ,17.0% and 8.3% ,*** of ITNs among children was 30.0% (112/373) and UTNs 12.9% (48/373).Positive contributors to ITNs utilization were literacy,enhanced economy, experience of marriage,and being gainfully employed(P<0.05);while negative contributors were ignorance,poverty and some cultural beliefs and ***:A more synchronized advocacy should be carried out on the potential benefits of ITNs utilization and *** ITNs should be made available to the people of the community at minimal or no cost.

关键词： Insecticide treated bed nets Utilization Households Malaria endemic city

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Effect of restoration technique on resistance to fracture of endodontically treated anterior teeth with flared root canals

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The Journal of Biomedical Research 2019年第2期33卷 131-138页

作者： Sary S Borzangy Samah M Saker Walid A Al-Zordk Department of Substitutive Dental Sciences College of Dentistry Taibah University Department of Fixed Prosthodontics Faculty of Dentistry Mansoura University

This study was designed to compare the impact of post and core systems on resistance to fracture of endodontically treated anterior teeth with flared root canals and to assess their fracture pattern. Sixty central incisors were cut horizontally 2 mm coronal to the cementoenamel junction(CEJ). After root canal therapy, teeth were assigned into 6 groups(n = 10 each) based on a post system and used as follows: Group C, non-flared root received size #1 glass fiber posts(Control); Group AP, flared root restored with anatomical post; Group RC, flared root restored with size #1 fiber post and cemented with thick layer of resin cement; Group CR, flared root restored with size #1 and reinforced with composite resin; Group CM, cast post-core; Group CP, CAD/CAM polymer-infiltrated ceramic post and *** post cementation, core build-up and crown insertion, the specimens were thermo-cycled up to 10,000 cycles(5 C/55 C; 30 seconds dwell time, 6 seconds transition time) and then statically loaded at 1 mm/minute crosshead speed using a universal testing machine. One-way ANOVA and Tukey HSD post hoc test(α= 0.05) were used for data analysis. Group C recorded significantly higher resistance to fracture values [(826.9±39.1) N] followed by group CP [(793.8±55.6) N] while group RC yielded the lowest fracture resistance values [(586.7±51.4) N]. The resistance to fracture of wide root canals can be enhanced by using one-piece CAM/CAM post and core as an alternative to the use of either glass fiber post, relined with composite resin increasing the thickness of luting cement or the use of cast post and core system. However, this was an in vitro investigation and further in vivo studies are necessary.

关键词： anatomical post customized post endodontically treated teeth flared root canal

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Evaluation of alcoholic alkaline treated rice starch as a binder

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Asian Journal of Pharmaceutical Sciences 2016年第1期11卷 203-204页

作者： Padungkwan Chitropas Yanisa Boonwatcharapan Saengrawee Sutthiparinyanont Faculty of Pharmaceutical Sciences Khon Kaen UniversityKhon Kaen 40002Thailand School of Pharmaceutical Sciences University of PhayaoPhayao 56000Thailand

The tablet is one of widely used dosage forms for oral route of administration because of convenience of use and short onset of *** is a substance used to bond powder together during the production of a *** compounds have been reported for use as binders including starch,cellulose,povidone and their derivatives[1].Starch from rice grain which is safe and abundant by-product of Thailand agriculture must be heated to prepare binding *** treated with alcoholic-alkaline method increased solubility,viscosity and swelling capacity in water at room temperature[2,3].

关键词： Rice starch Alcoholic alkaline treated Binder

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