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    Torrefaction of Pelletized Oil Palm Empty Fruit Bunches

    Ahmad, Arshad, Johari, Anwar, Oladokun, Olagoke
    arXiv.org, May 10, 2015
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Torrefaction of Pelletized Oil Palm Empty Fruit Bunches
    Author: Ahmad, Arshad; Johari, Anwar; Oladokun, Olagoke
    Contributor: Oladokun, Olagoke (pacrepositoryorg)
    Subject: Calorific Value ; Solid Fuels ; Briquets ; Pyrolysis ; Drying
    Description: The torrefaction of oil palm Empty Fruit Bunch (EFB) briquettes was examined in this study. The results indicate that temperature significantly influenced the mass yield, energy yield and heating value of oil palm empty fruit bunch (OPEFB) briquettes during torrefaction. The solid uniform compact nature of EFB briquettes ensured a slow rate of pyrolysis or devolatization which enhanced torrefaction. The mass yield decreased from 79.70 % to 43.03 %, energy yield from 89.44 % to 64.27 % during torrefaction from 250 {\deg}C to 300 {\deg}C. The heating value (HHV) of OPEFB briquettes improved significantly from 17.57 MJ/kg to 26.24 MJ/kg after torrefaction at 300 {\deg}C for 1 hour. Fundamentally, the study has highlighted the effects of pelletization and torrefaction on solid fuel properties of oil palm EFB briquettes and its potential as a solid fuel for future thermal applications.
    Is part of: arXiv.org, May 10, 2015
    Identifier: 2331-8422 (E-ISSN)

    • Several versions

    4-Lump kinetic model for vacuum gas oil hydrocracker involving hydrogen consumption

    Sadighi, Sepehr, Ahmad, Arshad, Rashidzadeh, Mehdi
    Korean Journal of Chemical Engineering, 2010, Vol.27(4), pp.1099-1108 [Peer Reviewed Journal]

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    Primary amyloidoma of chest wall--a rare condition

    Kumar, Suresh, Kumar, Surender, Ahmad, Arshad, Kumar, Awanish
    BMJ case reports, 27 March 2012, Vol.2012 [Peer Reviewed Journal]
    MEDLINE/PubMed (U.S. National Library of Medicine)
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    Title: Primary amyloidoma of chest wall--a rare condition
    Author: Kumar, Suresh; Kumar, Surender; Ahmad, Arshad; Kumar, Awanish
    Subject: Thoracic Wall ; Amyloidosis -- Diagnosis
    Description: Organ specific amyloidosis has been shown to be confined to various organs like liver, lung, spleen, urinary bladder and gastro-intestinal tract, but amyloidoma or tumoural amyloidosis of chest wall with no evidence of systemic amyloidosis is an extremely rare presentation and only two cases have been reported till now. The authors report a case of chest wall amyloidoma with review of literature.
    Is part of: BMJ case reports, 27 March 2012, Vol.2012
    Identifier: 1757-790X (E-ISSN); 22605798 Version (PMID); 10.1136/bcr.01.2012.5552 (DOI)

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    Resistance to Change of Academics towards Accreditation

    Kadzrina Abdul Kadir, Darwina Ahmad Arshad, Johanim Johari
    Journal of Business and Social Review in Emerging Economies, 01 December 2016, Vol.2(2), pp.127-134 [Peer Reviewed Journal]
    Directory of Open Access Journals (DOAJ)
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    Title: Resistance to Change of Academics towards Accreditation
    Author: Kadzrina Abdul Kadir; Darwina Ahmad Arshad; Johanim Johari
    Description: When universities makes the decision to go for accreditation to improve performance standards, there has been an impact on academics who are involved in the process. The literature suggests that for accreditation such as business programs such as AACSB, both positive and negative impact could occur for academics. This paper gives an overview on three areas of literature that is pertinent to this topic: resistance to change, accreditation impact on the university, and accreditation impact on business academics with balanced scorecard to measure accreditation impact.
    Is part of: Journal of Business and Social Review in Emerging Economies, 01 December 2016, Vol.2(2), pp.127-134
    Identifier: 2519-089X (ISSN); 2519-0326 (E-ISSN); 10.26710/jbsee.v2i2.29 (DOI)

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    Evisceration of the small bowel through a perforated and prolapsed sigmoid colon: an unusual presentation of rectal prolapse

    Ahmad, Arshad, Kumar, Suresh, Sonkar, Abhinav Arun, Kumar, Sanjeev
    BMJ case reports, 15 April 2016, Vol.2016, pp.10.1136/bcr-2016-214811 [Peer Reviewed Journal]
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    Title: Evisceration of the small bowel through a perforated and prolapsed sigmoid colon: an unusual presentation of rectal prolapse
    Author: Ahmad, Arshad; Kumar, Suresh; Sonkar, Abhinav Arun; Kumar, Sanjeev
    Subject: Colon, Sigmoid ; Intestine, Small ; Intestinal Perforation -- Complications ; Rectal Prolapse -- Complications ; Sigmoid Diseases -- Complications
    Description: Spontaneous prolapse of the sigmoid colon and evisceration of the small bowel through a rupture in the rectosigmoid is a rare presentation. We report a case of a 60-year-old man presenting with massive small bowel evisceration through a perforation in a prolapsed sigmoid colon. The patient had a 2-year history of rectal prolapse. He was also incontinent for flatus and liquid stool. There was no other significant medical history. After reduction of the small intestine, a large perforation was seen in the prolapsed sigmoid colon. The sigmoid colon was identified by presence of appendices epiploicae and taeniae coli. After initial resuscitation, an emergency laparotomy was performed. The perforated sigmoid colon was resected and a Hartmann's colostomy was created. This resulted in complete recovery. Reversal of the Hartmann's colostomy was performed after 6 weeks.
    Is part of: BMJ case reports, 15 April 2016, Vol.2016, pp.10.1136/bcr-2016-214811
    Identifier: 1757-790X (E-ISSN); 27084900 Version (PMID); 10.1136/bcr-2016-214811 (DOI)

    • Several versions

    Comparative Analysis of Doppler Guided Hemorrhoidal Artery Ligation (DG-HAL) & Infrared Coagulation (IRC) in Management of Hemorrhoids

    Ahmad, Arshad, Kant, Rama, Gupta, Avneet
    Indian Journal of Surgery, 2013, Vol.75(4), pp.274-277 [Peer Reviewed Journal]

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    The 3M National Teaching Fellowship: Findings from a National Questionnaire on the Impact of the Program

    Ahmad, Arshad, Stockley, Denise, Smith, Ron, Hastings-Truelove, Amber
    Collected essays on learning and teaching, 2017, Vol.10, p.15 [Peer Reviewed Journal]
    ERIC (U.S. Dept. of Education)
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    Title: The 3M National Teaching Fellowship: Findings from a National Questionnaire on the Impact of the Program
    Author: Ahmad, Arshad; Stockley, Denise; Smith, Ron; Hastings-Truelove, Amber
    Subject: Questionnaires ; Fellowships ; Program Effectiveness ; Program Evaluation ; Administrator Attitudes ; Teacher Attitudes ; Student Attitudes ; National Surveys ; Selection Criteria ; Influences ; Institutional Characteristics ; Higher Education ; Teaching (Occupation) ; Foreign Countries ; Education
    Description: In 2016 the 3M National Teaching Fellowship reached a milestone in celebrating the 30th anniversary of the first fellowship in 1986. The fellowship is the premier award of the Society for Teaching and Learning in Higher Education and each year up to 10 fellows are announced. Thus far, there has not been a systematic review or evaluation of the fellowship program. This study is a starting point to engage the various stakeholders and gather their perspectives regarding the fellowship program. This paper highlights the findings of a national questionnaire that targeted 3M National Teaching Fellows, administrators, educational developers, faculty, and students. The findings provide a snapshot of the awareness of the fellowship, the impact of fellows on their institutions and beyond, and recommendations for the future of the program.
    Is part of: Collected essays on learning and teaching, 2017, Vol.10, p.15
    Identifier: 2368-4526 (ISSN); 2368-4526 (E-ISSN)

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    Thermogravimetric and Kinetic Analyses of Oil Palm Empty Fruit Bunch (OPEFB) Pellets Using the Distributed Activation Energy Model

    Nyakuma, Bemgba, Ahmad, Arshad, Johari, Anwar, Abdullah, Tuan
    Journal of Physical Science, 2016, Vol.27(3), pp.67-83 [Peer Reviewed Journal]
    © ProQuest LLC All rights reserved, Engineered Materials Abstracts, Solid State and Superconductivity Abstracts, METADEX, Materials Science Database, Advanced Technologies & Aerospace Database, Engineering Database, East & South Asia Database, Publicly Available Content Database, Advanced Technologies Database with Aerospace, Materials Research Database, Technology Research Database, ProQuest Engineering Collection, ProQuest Advanced Technologies & Aerospace Collection, ProQuest Materials Science Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest Central China, ProQuest One Academic, Advanced Technologies & Aerospace Index (ProQuest), Materials Science Index (ProQuest), Materials Science Collection (ProQuest), Engineering Collection (ProQuest)
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    Title: Thermogravimetric and Kinetic Analyses of Oil Palm Empty Fruit Bunch (OPEFB) Pellets Using the Distributed Activation Energy Model
    Author: Nyakuma, Bemgba; Ahmad, Arshad; Johari, Anwar; Abdullah, Tuan
    Subject: Pyrolysis ; Reaction Kinetics ; Fruits ; Activation Energy ; Thermal Degradation ; Palm ; Decomposition ; Pellets ; Miscellaneous Sciences (So) ; General and Nonclassified (MD) ; General and Nonclassified (Ep) ; General and Nonclassified (Ed) ; General and Nonclassified (EC) ; Thermogravimetry ; Oil Palm ; Empty Fruit Bunches ; Pellets ; Energy Model;
    Description: The thermal degradation behaviour and decomposition kinetics of oil palm empty fruit bunch (OPEFB) pellets were investigated using a thermogravimetric analyser and the distributed activation energy model (DAEM). The OPEFB pellets were heated from 30°C to 1000°C at three different heating rates (5, 10, 20°C min^sup -1^) under a nitrogen atmosphere. The thermogravimetric-derivative thermogravimetric (TG-DTG) curves revealed that the non-isothermal decomposition of OPEFB pellets occurred in the following three stages: drying (35°C-175°C), active pyrolysis (200°C-370°C) and passive pyrolysis (370°C-1000°C), which resulted in the loss of moisture, volatile matter and char, respectively. The distributed activation energy model was subsequently used to determine the apparent activation energies (E) and pre-exponential factors (A), which ranged from 37.89 kJ mol^sup -1^ to 234.05 kJ mol^sup -1^ and from 2.05 × 10^sup 2^ min^sup -1^ to 3.54 × 10^sup 18^ min^sup -1^, respectively, for conversions...
    Is part of: Journal of Physical Science, 2016, Vol.27(3), pp.67-83
    Identifier: 16753402 (ISSN); 21804230 (E-ISSN); 10.21315/jps2016.27.3.5 (DOI)

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    Kinetic behaviour of graft copolymerisation of nitrogenous heterocyclic monomer onto EB-irradiated ETFE films

    Sithambaranathan, Paveswari, Nasef, Mohamed, Ahmad, Arshad
    Journal of Radioanalytical and Nuclear Chemistry, 2015, Vol.304(3), pp.1225-1234 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Kinetic behaviour of graft copolymerisation of nitrogenous heterocyclic monomer onto EB-irradiated ETFE films
    Author: Sithambaranathan, Paveswari; Nasef, Mohamed; Ahmad, Arshad
    Subject: Kinetic investigation ; Radiation induced graft copolymerisation ; 4-Vinyl pyridine ; ETFE film
    Description: Kinetic behaviour of graft copolymerisation of a nitrogenous heterocyclic monomer, 4-vinylpyridine (4-VP), onto electron beam irradiated poly(ethylene-co-tetrafluoroethylene) (ETFE) films was investigated in correlation with reaction parameters (absorbed dose, monomer concentration and reaction temperature). This was established by determination of initial polymerisation rate ( r p0 ), characteristic radical recombination rate (γ) and delay time ( t 0 ). The orders of the dependence of the initial rate of grafting on the absorbed dose and monomer concentration were found to be 2.28 and 3.49, respectively. The effect of temperature was investigated in the range of 50–70 °C and the activation energy was determined. The incorporation of poly(4-VP) grafts and the accompanied chemical changes in the grafted ETFE films were monitored using Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, respectively. The results of the present study showed that a quantitative kinetic description for grafting of 4-VP onto ETFE can be established and the degree of grafting can be tuned by controlling the reaction parameters.
    Is part of: Journal of Radioanalytical and Nuclear Chemistry, 2015, Vol.304(3), pp.1225-1234
    Identifier: 0236-5731 (ISSN); 1588-2780 (E-ISSN); 10.1007/s10967-015-3927-6 (DOI)

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    Vapor-liquid equilibrium of ethanol/ethyl acetate mixture in ultrasonic intensified environment

    Mahdi, Taha, Ahmad, Arshad, Ripin, Adnan, Nasef, Mohamed
    Korean Journal of Chemical Engineering, 2014, Vol.31(5), pp.875-880 [Peer Reviewed Journal]