Study on Physical and Mechanical Properties of Rubber Latex Composites with SiO2 Addition

he Study on Physical and Mechanical Properties of Rubber Latex Composites with SiO2 addition have two main objectives which are to study and establish the physical and mechanical properties of the rubber wood lignin composites and evaluate the oil resistance effect of RWL composites with SiO2 addition. Silica sand that used in this project is collected from around Tronoh and has the particles size of less than 43μm. There is a derivation of process of new lignin from Malaysian Rubber tree but there is still no establishment on their relevant properties. This project will investigate the good property of rubber wood lignin and silica sand by produce a newly improved rubber and establish on relevant physical and mechanical properties of the rubber wood lignin composites with silica sand addition. This study will cover the understanding of composites advantages. The preparation of silica sand to produce 43μm size is by using ball milling. This silica will through the mixing process with sulphur as cure agent and zinc oxide as activator and lignin as additive in rubber. After mixing, the rubber composites will be stored in the bottle for maturation for two days, and casting. The rubber film will be rinse off with water and hanging for one day. The last process is drying in oven at 100oC for 30 min and stamping into the dumbbell and circular shape for further testing. The result obtains is elastic modulus increasing from 0.043MPa for Batch 1 to 0.095MPa for Batch 2 and 0.142MPa for Batch 3. The same pattern can be observed for Batch 4 which has a value of 0.085MPa and 0.100 for Batch 5. The FESEM study shown us that in Batch 2 and Batch 4 there have silica agglomerates caused by the non-uniform distribution of silica in rubber compound which leads to brittlement of the material. Based on swelling testing results, Batch 1 (control) was less resistance to oil, 125% due to unsaturated polymer which is degrades in oil. Oil resistance was far worse when the percentage of silica content was 6%, 141.7% for Batch 2 and 120.4% for Batch 4 as compared to 111.6% for Batch 3 and 92.1% for Batch 5 which has 12% of silica contents which were improved. Therefore, the good physical property in oil resistance was established in Batch 3 and Batch 5 will give huge contribution in industrial and automotive industry

The effect of silane treatment on nanosized carica papaya seed modified pullulan as biocoagulant in wastewater treatment

Currently, conventional wastewater treatment process used chemical coagulant such as Aluminium sulphate. However, the residual aluminium in treated wastewater causes toxicity and serious health issues such as Alzheimer’ disease. Thus, in this study the potential of nanosized Carica Papaya (CP) seeds treated by silane coupling agent incorporated to pullulan on wastewater treatment was investigated. The biocoagulant produce prepared at a different composition of CP range from 1% to 9% was used to treat sewage wastewater. The biocoagulant was characterized by particle size analyser, FTIR and FESEM. The treated wastewater was analyzed by jar test in term of turbidity, pH, dissolved oxygen and Total Suspended Solid with biocoagulant dosage at 0.6 g/L. The size of nanosized biocoagulant was obtained at 608.9 nm. Silane treatment provides well dispersion of nanosized Carica Papaya seed powder in the pullulan matrix phase. FTIR analysis shows the presence of O-H, C=O and Si-O-CH3 bond. The highest turbidity reduction observed at the composition of nanosized CP5/P and silane treated nanosized CP5/P up to 93.89% and 93.98% respectively. However, no significant changes observed on turbidity reduction with increasing CP seeds content for both biocoagulant. Further, at these compositions, the TSS reduced up to 20% and 60% respectively. The DO value of wastewater decreased from the initial value and the increased the pH from 6.58 to 6.69 lead to the neutral condition. Therefore, the effectiveness of both untreated and silane treated biocoagulant were further confirmed upon textile wastewater with turbidity reduction achieved up to 7.84% and 14.54 % respectively. Overall, silane treatment enhanced the effectiveness of nanosized CP modified pullulan as biocoagulant

Serdang cendol menang tempat kedua VEST 2017

BANGI – Serdang Cendol dari Universiti Putra Malaysia (UPM) yang diketuai usahawan siswa Muhammad Faris Jaafar memenangi tempat kedua Pertandingan Varsity Entrepreneurship Skills & Talents (VEST) 2017

Preparation and characterization of photocatalyst for the conversion of co2 to methanol

Due to the reliance of the world on fossil fuel as major source of energy, the CO2 emission to the environment is inevitable which is responsible for global warming. Photocatalytic reduction of CO2 to fuel, such as methanol, methane etc. is a promising way to address the CO2 emission and energy crisis. The methanol produces from the photocataytic conversion can be used as source of fuel. CdS is a classical photocatalyst shows high activity under ultraviolet (UV) light irradiation. UV light covers only 4% of the solar light spectrum, hence visible light active photocatalyst for CO2 conversion is important. In the present work, Bi2S3/CdS was synthesized as an effective visible light responsive photocatalyst for CO2 reduction. The Bi2S3/CdS photocatalyst was prepared by the hydrothermal reaction between the precursors. The prepared powder was calcined at 250 in the muffle furnace. The catalyst was characterized by X-ray diffraction (XRD) and Fourier Transform Infrared spectroscopy (FTIR). The product has been analysed by using gas chromatograph flame ionization detector (GC-FID). The photocatalytic activity in methanol production as a function of time has been investigated. The maximum yield of methanol was obtained after 6 hours of reaction. The effect of CdS concentration in Bi2S3/CdS photocatalyst was investigated and the yields of methanol were increased with increasing of CdS concentration. The maximum yield of methanol was obtained with Bi2S3/CdS with 45 % of CdS. The present works shown the potentially of Bi2S3/CdS for CO2 reduction under visible light

Koordinasi Tim Pora Dalam Pengawasan Tenaga Kerja Asing Legal Tenaga Pendidik Di Kota Medan

The PORA team is a team consisting of several agencies that have duties and functions related to the presence and activities of foreigners. The coordination between the PORA Team and the Manpower Office is to strengthen the supervision of foreign workers from administration to field supervision, but internally, the PORA Team still has problems. This study aims to identify and describe the coordination of the PORA Team in the supervision of legal TKA educators in Medan City. The research method used is descriptive qualitative method. The results of the study indicate that coordination in the supervision of foreign workers requires an approach between members and inter-institutional meetings. In the agency's business indicators, the coordination of the PORA Team caused internal problems due to a lack of understanding of the main tasks and functions of the members. In the unit of action indicator, the existence of sectoral egos such as the Manpower Office acts by itself in the supervision of foreign workers. On the indicators of shared goals, the agencies that are members of the PORA Team designate Immigration as their leading sector. However, there are findings in the field, that there is an agency under the auspices of the Medan City Government which forms a Foreigner Monitoring Team

STRATEGIES USED IN THE TRANSLATION OF THE WIZARD AND THE HOPPING POT BY J.K. ROWLING

The world of literature is always evolving from time to time, and for the sake of these works to be evenly shared throughout the globe, the role of translator is needed. In order to observe how a literary work is translated, this research discusses a bedtime story entitled The Wizard and the Hopping Pot written by J.K. Rowling and its translation by Nina Andiana and Listiana Srisanti, Sang Penyihir dan Kuali Melompat. The purposes of this research are to find out what strategies are used in the translation, as well as to evaluate the translation’s accuracy, clarity, and naturalness to the readers. The method used is descriptive qualitative which means the data are analyzed and discussed in the form of sentences. The result shows that there are forty-seven data found which include nine different translation strategies namely transposition, unit shifts, cohesion change, scheme change, distribution change (expansion and reduction), hyponymy, explicitness change (implicit to explicit and explicit to implicit), information change, and coherence change. By conducting this research, the researcher implies to provide more translation strategies and evaluations so that the researcher and also the readers in general can use it whenever they find difficulties in doing any translation

Understanding of gharar in sale among ACIS students UiTM Puncak Alam / Nur Sabrina Ismail

In Islam, gharar is one of the prohibited elements in the sale. Many scholars have explained this in more detail. Gharar is divided into two types which are gharar fahish (excessive gharar) and gharar yasir (minor gharar). Although there are various opinions on gharar, it can be concluded that as Muslims we should avoid getting involved in the sale of gharar fahish. This study discusses the level of student understanding of gharar in sales. Synonymous students are often involved with online purchases, so this study was conducted to see their level of understanding. The objective of this study was to examine the level of understanding of sales performance among ACIS students UiTM Puncak Alam. Next, to analyze the method of avoiding the gharar element in the sale and to identify the importance of knowing the gharar element in the sale. The method used for this study is a quantitative method which is through a distributed questionnaire. This study also used library research. This study found that ACIS students UiTM Puncak Alam have a good grasp of the gharar element in the sale. Suggestions for improvement for future studies are to expand the respondents and to increase the objective of the study. Efforts to increase student understanding of the gharar element in the sale can be made by various parties such as the government, teachers, and students themselves

INTERNET SLANG CONTAINING CODE-MIXING OF ENGLISH AND INDONESIAN USED BY MILLENNIALS ON TWITTER (Slang Internet Mengandung Campur-Kode Bahasa Inggris dan Indonesia yang Digunakan oleh Milenial di Twitter)

Penelitian ini membahas kreasi slang internet yang mengandung campur-kode bahasa Inggris dan bahasa Indonesia yang dilakukan oleh pengguna milenial Twitter. Tujuan dari penelitian ini adalah untuk mengeksplorasi kreasi slang internet yang menerapkan campur-kode bahasa Indonesia dan bahasa Inggris, serta alasan yang memotivasi penggunanya untuk melakukan itu. Metode yang digunakan dalam penelitian ini adalah metode kualitatif yang berarti data yang terkumpul dianalisis dengan penjelasan menggunakan kata-kata. Hasil penelitian menunjukkan terdapat sepuluh kreasi campur-kode yang ditemukan pada tingkatan morfem, tujuh pada tingkatan frasa, dan enam lainnya dalam bentuk singkatan. Penelitian ini juga menemukan bahwa pengguna milenial membuat kreasi slang internet hanya untuk bersenang-senang dan agar percakapan antar sesama pengguna tidak terlalu canggung, kaku, dan formal.This research discusses the creation of internet slang which contains the code-mixing of English and Indonesian made by Twitter millennial users. The purposes of this research are to explore those creations of internet slang that implement the Indonesian-English code-mixing, as well as the reasons that motivate the users to do so. The method used in this research is a qualitative method which means the collected data are analyzed with explanation in words. The result of the research shows there are ten creations of code-mixing found on morpheme level, seven on phrase level, and six other in the form of abbreviation. This research also finds that millennial users create internet slang merely for fun and to make the conversations between fellow users less awkward, stiff, and formal

Impact of skill mismatch on employee job satisfaction. A study on HRM downstream corporate office Petronas / Nur Sabrina Suhaimi

The purpose of this study is to identify to what extend the type of skill mismatch impact on employee job satisfaction. The dependent variable is Job Satisfaction and independent variable are Over Skilled and Under Skilled which is among the type of skill mismatch. This research is being conducted in HRM Downstream Corporate Office, PETRONAS. In completing this research, about 48 questionnaires have been distributed to the respondents. The respondents is pick randomly among the staff in HRM Downstream Corporate Office, PETRONAS. In order to get the result, the researcher has used SPSS program to analyze data from the information gathered. From the findings, the researcher indicates that there is a relationship between the type of skill mismatch and employee job satisfaction

Rankl expression as a prognostic marker in stage III giant cell tumour of the bone

Introduction: Giant cell tumour of bone is an aggressive benign bone tumor composed of unstable spindle shaped neoplastic mononuclear stromal cells and reactive components osteoclast like giant cells. GCT in Asian population including Malaysia, presented with more aggressive tumour and higher rate of lung metastasis. Although numerous attempts have been made to predict the behavior of GCT, there are no definite biological or histological parameters to determine the prognosis or aggressiveness of this lesion. Objectives: The aim of this study is to determine the presence of RANKL activity in aggressive type (stage III) GCT and its effectiveness as a prognostic marker in predicting risk of local recurrence and lung metastasis in GCT of bone. Material and method: We evaluated 39 cases of stage III GCT of bone for RANKL expression using immunohistochemical staining. There were 21 males and 18 females patients and the mean age was 36.2 (ranged between 11 to 66 years old). Majority of the patients were Malays (85%) followed by Chinese (15%). 46.2% of the tumour occurred at a knee region followed by distal radius (17.9%). 35 out of 39 (90%) patients were treated with wide resection, 3 by intralesional resection and 1 cases of metacarpal GCT with extensive soft tissue involvement were treated by rays amputation. 10% of cases had local recurrence and 20% presented with or eventually developed lung metastasis. 5% of the cases presented with local recurrence and lung metastasis. Expression of RANKL was evaluated by immuno-histochemical staining techniques using the rabbit polyclonal antibody RANKL representing full-length RANKL human origin from Santa Cruz Biotechnology. The scoring was done by counting the positively stained cell in the background of 1000 mononuclear stromal cells. Data was analyzed using PASW version 18.0. Result: RANKL expressions were evaluated by percentage of expression (75%), staining intensity (1 to 3) and final score of the two value (1-2= weak, 3-4= moderate, 5-6= strong). 82% of the sample expressed RANKL >75% from whole stromal cell population. Base on staining intensity, 48% scored 2, and only 23% had maximum intensity (3). 66.6% demonstrate strong RANKL expression. The mean value for RANKL according to percentage of staining, staining intensity and final score was 2.79 (SD 0.47), 1.95 (SD 0.72) and 4.77 (SD 0.99) respectively. The mean percentagestaining between no recurrence and with recurrence group was significantly different (p=0.009). Conclusion: RANKL expression is generally high in stage III GCT and is a reliable prognostic markers in predicting the risk of local recurrence but not in lung metastasis