165 research outputs found
Synthesis and physicochemical analysis of Polystyrene-Anchored Pd(II) metal complex / Siti Kamilah Che Soh, Siti Aminah Jusoh and Mustaffa Shamsuddin
No full textA polystyrene (PS)-anchored Pd(II) metal complex was synthesized on cross-linked polymer by heating a mixture of chlorometylated polystyrene with phenyldithiocarbazate and carbon disulfide in the presence of potassium hydroxide (KOH) in dimethylformamide (DMF). The reaction mixture was heated at 80 °C to form the corresponding phenyldithiocarbazate-functionalized polymer. Then, it was treated with bis(benzonitrile)palladium(II) chloride. The
properties of dark colored polymer, impregnated with the metal complex was then characterized by various spectroscopic technique such as Fourier Transform Infrared (FTIR), Scanning Electron Microscopy/Energy Dispersive X-ray (SEM/EDX), CHNS elemental analysis, BET surface area, X-ray Diffraction (XRD), Thermogravimetric (TGA) and Inductively Coupled Plasma-Optical Emission (ICP-OES) spectroscopy
New characterizations of Von Neumann regular rings and a conjecture of Shamsuddin
No full textA theorem of Utumi states that if R is a right self-injective ring such that every maximal ideal has nonzero annihilator, then R modulo the Jacobson radical J is a finite product of simple rings and is a Von Neuman regular ring. We prove two theorems and a conjecture of Shamsuddin that characterize when R itself is a von Neumann ring, using a splitting theorem of the author on when the maximal regular ideal of a ring splits off
New characterizations of Von Neumann regular rings and a conjecture of Shamsuddin
No full textA theorem of Utumi states that if R is a right self-injective ring such that every maximal ideal has nonzero annihilator, then R modulo the Jacobson radical J is a finite product of simple rings and is a Von Neuman regular ring. We prove two theorems and a conjecture of Shamsuddin that characterize when R itself is a von Neumann ring, using a splitting theorem of the author on when the maximal regular ideal of a ring splits off
Biosynthesis of gold nanoparticles using psidium guajava leaf extract
No full textNanomaterials are attracting a lot of attention nowadays as they show different chemical and physical properties that are dependent on their size and shape. Different techniques have been used for synthesis metal nanoparticles but the use of plants for synthesis of nanoparticles could be advantageous over other environmentally methods as this eliminates the cost and the non toxicity is main feature. Here a simple biosynthesis approach was applied and gold nanoparticles were synthesized by using psidium guajava leaf extract as reducing and capping agent. Two different parameters were studied which are the metal ion concentration and volume of plant broth. The synthesis of gold nanoparticles was also monitored as function of reaction time. The formation of gold nanoparticles was monitored by UV-Vis spectrophotometer and the size of particles was confirmed by X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) techniques. TEM analysis showed that the AuNPs were mostly spherical in shape with an average size of 15 nm. Fourier Transform Infrared (FTIR) spectroscopy that the active biomolecules present in the Psidium guajava leaf extract act as capping and stabilizing agent for the AuNPs
N,N' - bis - salicylidene - 2, 2 - dimethylpropane -1, 3 - diamine palladium (II) ethanol solvate
No full textMUP Training / Mohd Zahlan Mustaffa ... [et al.]
No full textMUP's Training is a centre for student to enhance their talent and motivations. This company main business is offering motivation courses for students. They are stated in Alor Setar , Kedah. They started their first operation in January 200
The Effectiveness of Virtual R&D Teams in SMEs: Experiences of Malaysian SMEs
No full textThe number of small and medium enterprises (SMEs), especially those involved with research and development (R&D) programs and employed virtual teams to create the greatest competitive advantage from limited labor are increasing. Global and localized virtual R&D teams are believed to have a high potential for SMEs growth. Due to the fast growing complexity of the new product, coupled with new emerging opportunities of virtual teams, a collaborative approach is believed to be the future trend. This research explores the effectiveness of virtuality in SMEs virtual R&D teams. An online questionnaire emailed to Malaysian manufacturing SMEs and 74 usable questionnaires were received, representing a 20.8 percent return rate. To avoid the bias that may result from pre-suggested answer, a series of open-ended questions asked from expertise. This study based on analyzing an open-ended question; extract four main themes among expertise recommendations on the effectiveness of virtual teams for SMEs growth and performance. These are suitable for SMEs new product design manager to realize the key advantage and importance of virtual R&D teams in the process of NPD, which lead to increase the effectiveness of the new product's procedure.Virtual teams, New product development, Survey finding, Small and medium Enterprises.
Preparation and aggregation-induced emission of new 1,3,5-triazine-2,4,6-tricarboxamide with liquid crystal properties
No full textThe combination of aggregation-induced emission (AIE) and liquid crystal properties generates solid-state efficient luminescent liquid crystal materials.Here in, we reported the synthesis of 1,3,5-triazine-2,4,6-tricarboxamide and utilized it as a supramolecular organic motif for the AIE-active liquid crystal material.The compound exhibits high-intensity emission maxima at 417 and 468 nm in the solid state with excitation at 254 nm, whereas it shows weak emission in the solution phase. Also, this compound behaves as liquid crystalline material and shows columnar hexagonal mesophase with endothermic peaks at 73.4oC, 185.6oC, and exothermic peaks were observed at 181.9oC and 66.1oC with focal conic fan shape texture.The thermal data showed that the compound is stable up to 200oC
Les nationalistes indonésiens vus par un romancier malais : Shamsuddin Saleh
No full text— Henri Chambert-Loir (EFEO, Bandung) menumpahkan per- hatiannya pada seorang tokoh sastra, yang hidup antara Perang Dunia pertama dan kedua dan tidak begitu dikenal, Syamsuddin Saleh, seorang penulis roman yang berasal dari Sumatra, se- karang hidup di Malaysia Barat. Banyak buku telah ditulisnya semuanya dalam tulisan Arab ; hanya beberapa saja yang masih ada dan sukar didapat sekarang. Karya-karyanya se- kaligus merupakan roman sosial dan detektif. Sukar ditentukan sekarang apakah penulis betul-betul berhaluan "kiri", karena kadang-kadang memihak dan kadang-kadang memukul golo- ngan tersebut.— Henri Chambert-Loir (EFEO, Bandung,) discusses a little- known figure from the literature written between the two wars, the novelist Syamsuddin Saleh, who was born in Sumatra and at present lives in retirement in West Malaysia. His numerous works — of which only a few rare copies survive — were all published in Arabic characters ; they were at the same time both social novels and detective stories, and it is difficult now to say whether the author was in fact on the side of the "reds" whom he introduces in his works, sometimes to regard them approvingly, sometimes to condemn them.— Henri Chambert-Loir (EFEO, Bandung) s'intéresse à une figure peu connue de la littérature d'entre les deux guerres, celle du romancier Syamsuddin Saleh, qui natif de Sumatra, vit à présent retiré en Malaysia occidentale. Ses oeuvres nombreuses — mais dont seuls quelques rares exemplaires subsistent à present — ont été exclusivement éditées en caractères arabes ; elles tiennent à la fois du roman social et du roman policier et il est aujourd'hui difficile de dire si leur auteur était réellement du côté des "rouges" qu'il met en scène, pour tantôt les approuver, tantôt les condamner.Chambert-Loir Henri. Les nationalistes indonésiens vus par un romancier malais : Shamsuddin Saleh. In: Archipel, volume 12, 1976. pp. 147-174
Photocatalytic hydrogen production under visible light over Cd0.1SnxZn0.9-2xS solid solution photocatalysts
No full textA series of Cd0.1SnxZn0.9-2xS solid solution was successfully synthesized by hydrothermal method and employed as photocatalyst for photocatalytic hydrogen evolution under visible light irradiation. The structures, optical properties and morphologies of the solid solutions were studied by X-ray diffraction, diffuse reflectance UV–visible spectroscopy and field emission scanning electron microscopy. From the characterizations, it was confirmed that Sn can form solid solution with Cd0.1Zn0.9S and the high crystallinity can be maintained as well. Among all samples, the highest photocatalytic activity was observed on Cd0.1Sn0.01Zn0.88S photocatalyst, with average rate of hydrogen production 3.52 mmol/h, which was ca. 1.5 times higher than the Cd0.1Zn0.9S photocatalyst. In addition to the high activity, the Cd0.1Sn0.01Zn0.88S also showed high stability at long irradiation time. The role of Sn in preventing electron-hole recombination and photocorrosion was proposed
- …
