86 research outputs found
METODE PEMBAYARAN TAMU DI FRONT OFFICE DEPARTMENT HOTEL ARIA CENTRA SURABAYA
No full textThe goal to be achieved from the preparation of this final project is to find
out the payment methods available at the Aria Centra Surabaya hotel. The author
made observations at the Front Office Department Hotel Aria Centra Surabaya.
The author concludes that the payment methods that can be used by Hotel Aria
Centra Surabaya are cash payments, debit card and credit card payments, travel
agent vouchers, complimentary vouchers, and guarantee letters
Risk management analysis for construction of Kutai Kartanegara bridge-East Kalimantan-Indonesia
No full textFitoremediasi Zn Dari Limbah Cair Pabrik Pengolahan Karet Dengan Pemanfaatan Pistia Stratiotes L.
No full textRubber processing factory is one of big industries in Riau and potentially produce heavy metal such as Zn. The continuous factory activity will produce high level of Zn in liquid waste and cause the contamination of aquatic environment. One of the alternative efforts to overcome this effect is using phytoremediation. P. stratiotes that is known as a plant that may accumulate metals (Pb, Cd, Cr and Zn) at high concentration. This research aimed to test the ability of the growth of P. stratiotes and the ability of P. stratiotes in reducing the content of Zn in liquid waste of rubber processing factory. The research used Complete Random Design. P. stratiotes was grown for 20 days in liquid waste of rubber processing factory with the concentrations were 5, 10, 15, 20, 25% and without the liquid waste as a control (0%). Each concentration had 3 replications. Parameters observed were fresh weight gain and relative growth rate of P. stratiotes. Data was analyzed using ANOVA and LSD at the level of 5%. The results showed that the fresh weight P. stratiotes increased up to 33.65 g in the concentration of 25%. The highest relative growth was found in 5thday for all concentrations and control
Facile synthesis of hydroxyapatite particles from cockle shells (Anadaragranosa) by hydrothermal method
No full textHydroxyapatite particles, Ca10(PO4)6(OH)2, (HAp), have been successfully synthesized by hydrothermal method using cockle shells (Anadaragranosa) waste as the starting material. The cockle shells were calcined, hydrated (slaking) and undergone carbonation to form precipitated calcium carbonate (PCC). The PCC was added with (NH4)2HPO4 to form HAp by varying the temperatures and reaction times under basic condition (pH 10-11). The X-ray Diffraction (XRD) patterns revealed that the excellent product of HAp with hexagonal crystal structure can obtained via facile hydrothermal procedure (140 ° C for 16 h). Fourier transform infrared spectroscopy (FTIR) spectra analyses showed the presence of OH, HPO4 2-, and PO4 3- absorption bands, indicating the formation of HAp. The dried HAp particles powder was extremely pure with a specific surface area of 17.8 m2/g
Sintesis Natrium Silikat Menggunakan Silika dari Pasir Pantai Bengkalis
No full textSodium silicate (Na2SiO3) is a chemical industrial material that is widely used as a metal cleaner, adhesive, and as a filler in the detergent, soap and toothpaste industries. Sodium silicate can be synthesized from silica dioxide (SiO2), which can be obtained through an extraction process from materials containing silica such as sand, glass bottle waste or rice husks. In this research, the synthesis of Na2SiO3 was carried out using silica extracted from Bengkalis beach sand using the acid leaching method, with a 3M HCl solution. The results of X-ray fluorescence (XRF) analysis of Bengkalis Beach sand showed that the silica content reached 89.1%. This research aims to determine the effect of the molar ratio of the NaOH reactant to the extracted SiO2 (2:1, 3:1 and 4:1) on the Na2SiO3 produced. The synthesis of Na2SiO3 was carried out using the hydrothermal method at atmospheric pressure, by reacting a 4M NaOH solution with 10 g of silica from Bengkalis sand, by heating at 110oC for an hour and stirring at 600 rpm. A molar ratio of 2:1 is the best ratio which produces 9.427g of Na2SiO3. From analysis using Fourier Transform Infrared (FTIR) spectroscopy, the spectrum patterns obtained are suitable for compounds containing silanol (≡Si-OH) and siloxane (≡Si-O-Si≡) groups. The X-ray diffraction (XRD) pattern of the synthesized compound is in accordance with standard sodium silicate. The Na2SiO3 obtained has a crystal diameter of 44.8 nm with an agglomerate-shaped morpology
The effectiveness of habitat modification schemes for enhancing beneficial insects: Assessing the importance of trap cropping management approach
No full textSintesis Hidroksiapatit dari Precipitated Calcium Carbonate (PCC) Kulit Telur Ayam melalui Proses Hidrotermal
No full textHydroxyapatite Ca10(PO4)6(OH)2 is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas and the principal inorganic constituent of bones and teeth. Hydroxyapatite (HAp) materials used as bone implants, adsorbents and catalysts. In this research synthesis of hydroxyapatite can be made by using material which is rich of CaCO3 like PCC chicken's egg shell with a composition of 99,45% CaCO3. PCC chicken's egg shell which has calcium source was synthesized to HAp by hydrothermal process with varied of ratio Ca/P (1,57;1,67;1,77) and reaction temperature (140oC, 160oC, 180oC). HAp synthesized result has been analyzed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis, synthesis of HAp with hydrothermal method through precipitated calcium carbonat (PCC) showed the formation of hydroxyapatite in the presence of peaks PO43- dan OH-. The highest peak is obtained at reaction temperature 140oC with ratio Ca/P 1,57 and reaction temperature 160oC with ratio Ca/P 1,67. XRD diffraction results in hydroxyapatite get the highest purity obtained at temperature of 160oC at ratio 1,67 with a hexagonal crystal structures. The results of SEM-EDX analysis, show that the morphological form of agglomerates or clumping . The molar ratio of Ca/ P of hydroxyapatite which is made from chicken's egg shell through the PCC is 1,69
Overview of Indonesian Islamic Education: A Social, Historical and Political Perspective
No full textThe aim of this study is to examine how the historical genealogy of Islamic educational tradition, particularly the tradition of teaching and learning, has contributed to the development of Islamic education in Indonesia. By drawing together in an analytic way a historically based description of the social and political circumstances surrounding Indonesian Islamic education, the study discusses some significant issues concerning the religious base, knowledge base, structural form, and the pedagogical approach of Indonesian Islamic education, all of which are important to the development of a modern form of Islamic education.
The argument of the thesis is that the existing values of the Islamic tradition in education, particularly evident in Madrasah schools, provide a valuable basis for further developing and reconstructing an effective Islamic education system in Indonesia. However, there is also a strong need to construct an Islamic education curriculum in Indonesia that can meet the challenge posed by the circumstances generally understood as 'modernity'. The quality of teaching and learning in the Madrasah are very much influenced by the quality of the wider Islamic education programme. Any change in the curriculum of Islamic education will thus have significant effects on the quality of the Madrasah schools in Indonesia. This thesis will thus conclude by suggesting some implications for further development of Islamic education that arise from the study.
This is a qualitative study using an historical genealogical approach to discover, understand and analyze the challenges currently facing Islamic education In Indonesia. The techniques for collecting data involved, primarily, a critical reading of historical and contemporary policy documents. Primary and secondary sources were also collected, studied and subjected to a critical reading in the production of this account of Indonesian Islamic education
Analysis of heavy metal content of Pb in ballast water tank of commercial vessels in port of Tanjung Emas Semarang, Central Java province
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