Synthesis, characterisation and evaluation on the performance of ferrofluid for microplastic removal from synthetic and actual wastewater

Synthesis of ferrofluid without the addition of stabilizing agents or surfactants is an innovation of new method for microplastic removal. This study focuses on the ability of several types of oils as carriers and how they may improve the removal efficiency of the microplastic. The method is relatively low cost, simple and sustainable. The formation of ferrofluid involved the mixing of oil and iron oxide powder. The experimental work was commenced by adding 2 mm polyethylene terephthalate (PET) microplastics into synthetic ferrofluid. Then, the removal efficiency of microplastics was examined by varying the elements of ferrofluid based on three specific parameters, namely type of oil, volume of oil and dosage of iron oxide to obtain a standard formulation of the optimum results. Overall findings of the study indicated that the optimum formulation for ferrofluid preparation was at a ratio of 1:2.5 (volume of oil: dosage of magnetite) using lubricating oil which has successfully removed 99% of microplastic from water media. Subsequently, the physical and chemical properties of the prepared ferrofluid were also analysed using scanning electron microscope (SEM) and Fourier transform infrared (FTIR) spectroscopy. Performance evaluation of the prepared ferrofluid on actual wastewater (laundry wastewater) revealed that 64% of microplastics were removed after treatment

Flavonoids from the Roots of Amomum compactum Soland Ex Maton (Zingiberaceae)

Amomum compactum Soland Ex Maton is one of the Zingiberaceae family plants which is the endemic plants from West Java, Indonesia. This study was aimed to determine the chemical structure of flavonoid compounds from n-hexane extract of A.compactum Sol. Ex Maton roots. Dried powder of the roots was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Three flavonoids, 5-hydroxy-3,7,4`-trimethoxy kaempferol (1), 5-hydroxy-3,7,3',4'-tetra methoxy kaempferol (2) and 4'-hydroxy-3,5,7-trimethoxy kaempferol (3), have been isolated from the roots of A. compactum Sol. Ex Maton.  The chemical structures of compounds 1-3 were identified by spectroscopy data including infrared 1D-NMR, 2D-NMR and HRTOF-MS as well as by comparison with previously reported spectral data. Compounds 1-3 were isolated from this plant for the first time and showed free radical DPPH scavenging activity

Technolite Enterprise : Technolite / Nur Anis Adila Azmin ...[et al.]

TECHNOLITE ENTERPRISE provides any types of electronic components products to any individual, institution or company in addition of providing workshop. Our main objectives are to become the market leader in distribution of electronic components in Malaysia, and as source of reference for bumiputera entrepreneurs in the same field. There has been a need for high quality, durable electronic components in any company or institution for a long time, which prompted us to develop this business. The company plans to distinguish itself from other competing businesses by offering quality electronic components that can be in any sizes, brands, and types desired by the customers and in favorable price

Development of semi-automated guided vehicle for fertigation agriculture

The design of this project is to carry the pesticide spraying system for the fertigation purpose. The system is basically a semiautomated guided vehicle controlled by Arduino Uno and guided by railway meanwhile the man power is minimized by only turned on the switch and it will move accordingly as set

Conceptual Design of Natural Composite Grating Platform

There are several types of grating, such as platform, bridge decks and filters. In design process, there are several important terms that have to be prioritised; engineering design, strength to weight ratio, cost, maintainability, reparability etcetera. Advanced materials, such as composite materials offer great strength to weight ratio and high mechanical properties for grating fabrication. Furthermore the reparability and maintenance problems could be solved as it is anti corrosion and the long service life attribute of composite makes it a great design material for replacement of conventional steel or aluminium. Bio composites, such as bamboo and coir fiber yield advantage in terms of less cost and abundance availability compared to commercial unidirectional composite materials, such as glass fiber reinforced polymer (GFRP) and carbon fiber reinforced polymer (CFRP) which is considerably expensive yet possess higher mechanical properties. This papers presents a conceptual design of grating design utilizing bamboo composite as material. Pugh method has been chosen as design criteria selection matrix in finalizing the design of industrial grating for scaffolding (Pugh, 1991).

Azadirone-Type Limonoids from the Fruit of Chisocheton lasiocarpus and Their Cytotoxic Activity Against MCF-7 Breast Cancer Lines

Limonoid is derivatives of triterpenoid compound that have a wide variety of structures due to various ring-opening, rearrangements, and high-degree of oxidation. Limonoid is known as compounds that have wide-range of biological activities, including anticancer activity. This research was aimed to determine the chemical structure and cytotoxic activity of limonoid in the n-hexane extract of Chisocheton lasiocarpus fruit. Dried powder of C. lasiocarpus fruit was extracted using methanol followed by fractionated using n-hexane, ethyl acetate, and n-butanol. Five azadirone-type limonoids, 6α-(acetoxy)-14β,15β-epoxyazadirone (1), dysobinin (2), 7α-acetylneotricilenone (3), 6α-O-acetyl-7-deacetylnimocinol (4), and 7α-hyroxyneotricilenone (5), were isolated from the n-hexane extract of Chisocheton lasiocarpus fruit. The chemical structure of all compounds was identified by spectroscopic analysis, including 1D, 2D-NMR, IR, UV and HR-TOF MS as well as by comparison with previous reported spectra data. Compounds 1-5 were investigated from this plant for first time. The cytotoxic activity of the isolated compounds against MCF-7 breast cancer line were examined and the results showed that 7α-hyroxyneotricilenone (5) showed the moderate activity with IC50 values of 53 μ

Persepsi guru terhadap pengaplikasian kemahiran berfikir aras tinggi (KBAT) dalam Reka Bentuk dan Teknologi (RBT) sekolah rendah

Reka Bentuk dan Teknologi (RBT) merupakan mata pelajaran baharu yang diperkenal dalam Kurikulum Standard Sekolah Rendah (KSSR) bertujuan untuk mengukuhkan kemahiran berfikir murid untuk menyediakan modal insan yang dapat bersaing pada peringkat global. Kurikulum RBT yang direka bentuk mampu menjadikan murid untuk menghasilkan produk yang kreatif dan berasaskan teknologi sekali gus menjadikan mata pelajaran ini wadah dalam mengaplikasikan kemahiran berfikir aras tinggi (KBAT). Pembentukan budaya KBAT bagi mata pelajaran RBT ini disandarkan sepenuhnya kepada pengetahuan isi kandungan dan kemahiran pedagogi guru serta kaedah pengaplikasian KBAT yang efektif semasa proses pengajaran dan pembelajaran dijalankan. Justeru, kajian rintis ini dilakukan untuk mengenal pasti tahap pengetahuan dan kemahiran pedagogi guru dalam mengaplikasikan KBAT kepada murid melalui mata pelajaran RBT. Seramai 36 orang guru di Daerah Kinta Utara, Perak yang mengajar mata pelajaran RBT terlibat dalam kajian ini. Hasil daripada kajian menunjukkan tahap pengetahuan isi kandungan guru RBT berada pada tahap sederhana (M = 2.558, SP = 0.379). Kemahiran pedagogi guru RBT pula berada pada tahap sederhana mahir (M = 2.625, SP =0.450), manakala penguasaan elemen kemahiran berfikir beraras tinggi dalam pengajaran dan pembelajaran RBT berada pada tahap sederhana (M = 2.754, SP = 0.444). Secara keseluruhannya kajian ini memberikan input bahawa para guru perlu memantapkan pengetahuan isi kandungan dan kemahiran pedagogi dalam kurikulum RBT bagi menerapkan KBAT semasa proses pengajaran dan pembelajaran dalam bilik darjah. Malahan, dapatan juga boleh dijadikan landasan bagi mencari model pengajaran dan pembelajaran yang terbaik bagi mengamalkan budaya KBAT dalam kalangan murid dalam bilik darjah