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All Journal Jurnal Pendidikan IPA Indonesia Jurnal Zeolit Indonesia Journal of Case Reports in Dental Medicine
R. Amelia, R.
Universitas Negeri Malang, Indonesia
Dentistry Education Health Professions

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INCREASING THE Si/Al RATIO OF NATURAL ZEOLITE MORDENITE AS BASIC MATERIAL OF CATALYST Handhoyo, Roocyta; Prijatama, Herry; Sofiyah, Siti; Nurlela, Iis; Yusianita, Nita; Amelia, R.; Komala, Ratna
Jurnal Zeolit Indonesia Vol 4, No 1 (2005)
Publisher : Jurnal Zeolit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (81.575 KB)

Abstract

One of the application of zeolite as a multi-function mineral is the use as catalyst. Investigation to utilize Indonesian natural zeolite as a catalyst will increase the added value and gives a chance to reduce the dependency of imported catalyst. One of the main property, which allow zeolite to be used as a catalyst, is a high silica-alumina ratio, where Si/Al >10. As a preminalry stage to form a catalyst zeolite, research has been carried out to increase the Si/Al ratio of natural mordenite from Cikalong, Tasikmalaya. The method applied is dealumination process, which is followed by calcinations and ion exchange. This process is expected to modify the Na-zeolite from natural mordenit to be a NH4-zeolite which can be transformed to a catalyst zeolite. Dealumination process is carried out using HNO3, with variable concentration and time at temperature of 85°C. Thereafter, zeolite is calcined at 700°C and is followed ion exchange process using NH4NO3. The current stage of research has been succeeded to increase the Si/Al ratio of natural mordenite from Si/Al @ 5 to Si/Al > 10. The process condition applied is dealumination with 8N HNO3 for 24 hours at 85°°C and is followed by calcinations at 700°C for 2 hours. Ion exchange is proceeded with 5% NH4NO3 for 2 hours and is followed by another calcinations at 400°C for 2 hours.
THE INFLUENCE OF V DIAGRAM PROCEDURAL SCAFFOLDING IN GROUP INVESTIGATION TOWARDS STUDENTS WITH HIGH AND LOW PRIOR KNOWLEDGE Amelia, R.; H., Supriyono Koes; Muhardjito, Muhardjito
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5799

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The learning achievement of high school students of Malang city in physics was still low, thus the appropriate learning strategies was necessaryto optimize the physics learning achievement. V diagram procedural scaffoldingin Group Investigation was designed with the aim to optimize student learning achievement. The purpose of this study was to examine differences in learning achievement of groups of students who learn through Scaffolding Procedural strategies in Group Investigation and groups of students who are studying with Group Investigation, to examine differences in student achievement between thosewith high and low prior knowledge levels, and to examine the interaction between learning strategies (procedural scaffolding in GI and GI) and initial knowledge of students towardlearning achievement. The method used in this study wasquasi-experimental.The design used in this study was Two Factorial Design consisted of two experimental classes and two control classes each. The results indicated that learning achievement group of students who learn through proceduralscaffolding in Group Investigation was higher than the group of students who are studying with Group Investigation. The learning achievements of students with high prior knowledge surpassed those with low prior knowledge. Last, there was an interaction between the learning strategies and prior knowledge of students toward learning achievement.
THE INFLUENCE OF V DIAGRAM PROCEDURAL SCAFFOLDING IN GROUP INVESTIGATION TOWARDS STUDENTS WITH HIGH AND LOW PRIOR KNOWLEDGE Amelia, R.; Handayanto, S. K.; Muhardjito, M.
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5799

Abstract

The learning achievement of high school students of Malang city in physics was still low, thus the appropriate learning strategies was necessaryto optimize the physics learning achievement. V diagram procedural scaffoldingin Group Investigation was designed with the aim to optimize student learning achievement. The purpose of this study was to examine differences in learning achievement of groups of students who learn through Scaffolding Procedural strategies in Group Investigation and groups of students who are studying with Group Investigation, to examine differences in student achievement between thosewith high and low prior knowledge levels, and to examine the interaction between learning strategies (procedural scaffolding in GI and GI) and initial knowledge of students towardlearning achievement. The method used in this study wasquasi-experimental.The design used in this study was Two Factorial Design consisted of two experimental classes and two control classes each. The results indicated that learning achievement group of students who learn through proceduralscaffolding in Group Investigation was higher than the group of students who are studying with Group Investigation. The learning achievements of students with high prior knowledge surpassed those with low prior knowledge. Last, there was an interaction between the learning strategies and prior knowledge of students toward learning achievement.
Surgical Approach for Recurrent Plunging Ranula in a Young Girl – A Case Report Gazali, Muhammad; Fauzi, Abul; Amelia, R.
Journal of Case Reports in Dental Medicine Vol 3, No 1 (2021)
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jcrdm.v3i1.146

Abstract

Introduction:  Two variants have been described in the literature: a simple oral ranula and the deep diving or plunging ranula. Plunging ranulas arise when a simple ranula extends beyond the floor of the mouth into the neck. A plunging or diving ranula is a rare mucous fluid collection in the submandibular or parapharyngeal space resulting from damage or rupture of one or more ducts of the sublingual gland. An accurate diagnosis and an appropriate treatment plan are fundamental for a successful treatment of ranulas. Regardless of the surgical technique, conservative maneuvers associated with careful clinical monitoring were indispensable for the longevity and success of treatment. Objective: Excision of sublingual and submandibular gland be an option for this case with extraoral approach. Case: A 10-year-old girl presented with a chief complaint of a large swelling of the right submandibular, which had recurred after marsupialization. The clinical diagnosis was plunging ranula. Histopathological examination revealed heterotropia salivary gland with reactive follicular hyperplasia. Result: Histopathology examination reported as heterotopia salivary gland and reactive follicular hyperplasia can be parallel with pathophysiology of this case. The obstruction of salivary gland this patient association with anatomy anomalies or ectopic of the salivary gland. Evaluation post surgery shows no dysfunction of lingual and facial nerve. The treatment was successful with no recurrence was reported.Conclusion: This paper highlights a case report of recurrent plunging ranula was treated with extraoral approach be the method of choice for the success of treatment. 
Co-Authors Abul Fauzi, Abul Handayanto, S. K. Herry Prijatama, Herry Ida Ayu Putu Sri Widnyani Iis Nurlela, Iis Muhammad Gazali Muhardjito Muhardjito Nita Yusianita, Nita Ratna Komala, Ratna Roocyta Handhoyo, Roocyta Supriyono Koes Handayanto