A Review of property manager's competency in managing green building / Syamim Jaafar and Nor Aini Hj. Salleh

The insufficient property manager competency in handling operation and maintenance work often overshadows the benefits from green building development. The uniqueness of green building design makesit different with traditional building and need expertise to handle it. Thus, this study intends to determine the competencies required by property manager in managing green buildings. The reviews from previous research were conducted and study indicatesfour main competency elements, which are knowledge,skill, ability and other characteristics for property managers to manage green buildings. This research gives a significant impact for property managers in providing an effective and efficient green building managemen

Effect of a different mobile phase on LC–ESI–MS/MS performance for the identification and quantitation of polar and nonpolar heterocyclic amines in cooked chicken

An accurate and sensitive liquid chromatography-electrospray ionisation/multi stage mass spectrometry (LC–ESI–MS/MS) method has been developed for the characterization and quantitation of nine heterocyclic amine (HCA) compounds. We were identified 2-Amino-3-methyl-3H-imidazo[4,5-F]quinoline (IQ), 2-Amino-3-methyl-3H-imidazo[4,5-f]quinoxaline (IQx), 2-Amino-3,4-dimethyl-3H-imidazo[4,5-f]quinoline (MeIQ), 2-Amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), 2-Amino-3,7,8-trimethyl-3H-imidazo[4,5-f]quinoxaline (7,8-DiMeIQx), 2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine as polar molecules, and they were eluted accordingly at the beginning of the analysis. However, Norharman, Harman and AαC were identified as a non-polar molecules and were eluted last. The excellent selectivity and sensitivity achieved by the selected reaction monitoring mode permitted satisfactory quantitation and confirmation of the injected HCA compounds with limit of detection and quantitation ranges from 0.17 to 1.44 pg and 0.53 to 4.57 pg, respectively. The recoveries ranged from 74 to 108%, with an interday and intraday precision of 1.6–1.9% and 0.1–0.9%, respectively. The method was successfully applied to identify and quantify the studied HCAs in fried and grilled chicken

Steam System Load Shedding Operational Analysis Using Dynamics Simulation of a Fertilizer Plant

Steam system operation of a fertilizer plant can be complex due to high number of equipment, unavailable redundancy of steam suppliers and inter-dependency behaviour between steam users. The plant is subjected to partial or total shutdown whenever one boiler trips as both existing boilers are operating close to design capacity. Installation of an additional boiler will provide additional capacity margin in the event of one boiler trips. iCON(Symmetry) was used as the dynamic process simulation tool to establish proper management for load shedding activity with three boilers in operation. Model was developed for the integrated steam header, fuel gas and boiler feed water network. A detailed representation of the actual plant was achieved by incorporating plant hydraulics based on actual piping configurations, high fidelity equipment modelling, process control configurations, trip sequencing and operator manual interventions. This approach gives high accuracy in replicating the plant’s transient behaviour for load shedding case studies. The case studies prove the three boiler arrangement is able to sustain the plant’s continuous operation. An operational strategy was developed to minimize the impact of equipment trips. It is recommended to expand the model to include the process side to represent the actual plant behaviour with higher accuracy

Photocatalytic degradation of phenol by LaFeO3 nanocrystalline synthesized by gel combustion method via citric acid route

Focusing on the photocatalytic degradation of phenol under visible light, the synthesized lanthanum orthoferrites (LaFeO3) by gel combustion method using citric acid as sacrificial agent were investigated. With the highest reaction temperature of 200 degrees C, the physicochemical properties of synthesized samples were characterized by X-Ray diffraction (XRD) analysis, Brunauer-Emmet-Teller (BET), and Energy Dispersive X-Ray spectroscopy (EDS). On the other hand, UV-Vis spectroscopy analysis was carried out to determine the phenol photodegradation activities and mechanism. The results suggested the well-defined LaFeO3 nanocrystals with specific area of 28 m(2) g(-1) were successfully synthesized. Besides that, variations in operating parameters such as pH, catalyst dosage and initial concentration of phenol in synthetic wastewater were also examined. In conclusion, LaFeO3 nanocrystalline exhibited an exceptional photocatalytic activity for phenol degradation, thus providing a perfect alternative for pharmaceutical wastewater treatment