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<![CDATA[PERBEDAAN DAYA HAMBAT MADN KONSENTRASI 100% TERHADAP PERTUMBUHAN BAKTERI PORPHYROMONAS GINGIVALIS DAN AGGREGATIBACTER ACTINOMYCETEMCOMITANS ]]>
<![CDATA[Indah Wulandari]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Kosno Supriyanto]]>
<![CDATA[ Andalas Dental Journal Vol 6 No 1 (2018): Andalas Dental Journal ]]>
Publisher : <![CDATA[Faculty of Dentistry Universitas Andalas ]]>
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DOI: 10.25077/adj.v6i1.85
<![CDATA[Periodontal disease is the second common oral health disease after dental caries. Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans are the main species of bacteria that cause periodontitis. Improper use of antibiotics can cause bacterial resistence to antibiotics. Essential oil from Pogostemon cablin, Benth leaf is an essential oil from herb contains eugenol and terpenoid compounds which can be used as an alternative antimicrobial agent. The purpose of this research was to know the difference of inhibitory effect of Pogostemon cablin, Benth leaf essential oil to Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans.The method of this research was experimental laboratories with posttest only control group design. This Research was done using disc diffusion method on the Mueller Hinton Agar. The inhibition zone around the disc was measured by sliding caliper. The results were analyzed with non parametric test Mann Whitney.The results showed that Pogostemon cablin, Benth leaf essential oil had the inhibition zone. The inhibition zone againts Porphyromonas gingivalis was 13,47 mm and 41,15 mm on Aggregatibacter actinomycetemcomitans. The statistical test showed that Pogostemon cablin, Benth leaf essential oil can inhibit both bacterial growth with the bigger inhibition was on Aggregatibacter actinomycetemcomitans bacteria growth.]]>
<![CDATA[PERBEDAAN JENIS SENYUM ANTARA LAKI-LAKI DAN PEREMPUAN BERDASARKAN BENTUK LENGKUNG SENYUM PADA SISWA SMK NEGERI 6 PADANG ]]>
<![CDATA[Redha Fauzana]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Eni Rahmi]]>
<![CDATA[ Andalas Dental Journal Vol 6 No 2 (2018): Andalas Dental Journal ]]>
Publisher : <![CDATA[Faculty of Dentistry Universitas Andalas ]]>
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DOI: 10.25077/adj.v6i2.126
<![CDATA[Smile is one of the facial expression that are essential in expressing friendliness, agreement, and appreciation. Most patients that come to dentist to have treatment for an attractive smile. One of the component to make an attractive smile is smile arch. Smile arch have been the interest of the orthodontist in recent years. Smile arch is the relationship between a hypothetical curve drawn along the edges of the maxillary anterior teeth and the inner contour of the lower lip in smile. This study was to differ male and female’s smile type base on smile arch. This study was to evaluate of smile type based on smile arch with gender. A total of 31 females and 31 males were selected among criteria inclusion. Photographs taken with digital camera showing the subjects with a posed smile were used for this study and Adobe photoshop used to determine the smile arch. Student Mann Whitney test were used for statistical analysis. The resulting data showed that significantly difference (p<0,05) between smile arch and gender. The most common female’s smile are parallel smile (64.5) and male’s smile are straight smile (51.6%). In this study concluded that the curvature of the incisal edge anterior maxilla appears to be more pronounced or parallel for woman than for a men.]]>
<![CDATA[Hubungan Status Gizi dengan Persistensi Gigi Sulung pada Anak Usia 13 –15 Tahun di Smpn 5 Padang ]]>
<![CDATA[Nurul Trinanda Rizal]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Murniwati Murniwati]]>
<![CDATA[ Andalas Dental Journal Vol 5 No 1 (2017): Andalas Dental Journal ]]>
Publisher : <![CDATA[Faculty of Dentistry Universitas Andalas ]]>
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DOI: 10.25077/andalas dent. j..v5i1.152
<![CDATA[Over-retained primary tooth is a condition of deciduous tooth that is retained beyond time of exfoliation, which should completely exfoliate at the end of the age of 12 years. This condition can cause delay in eruption of permanent tooth and thus lead to malocclusion and other orthodontic problems. One of the several reasons this condition happen is malnutrition. The purpose of this research is to determine the correlation between nutritional status and over-retained primary tooth among children aged 13 to 15 years at Junior High School 5 of Padang City. This research was an analytic observational study. The respondents were 95 students of Junior High School 5 of Padang. Respondents chosen with a Proportionate Stratified Random Sampling. This study determine that there are about 21,1% underweight respondents and 78,9% normal-overweight respondents. There are 45 retained primary teeth from 24 respondents. About 25,3% respondents had over-retained primary tooth with the highest prevalence occurred in maxilla with the mostly retained teeth was left canine (20%). From the Chi-Square test obtained p value = 1 is greater than the value that is meaningful probability (>0,05) which means there is no a significant correlation between nutritional status and over-retained primary tooth among children aged 13 to 15 years. The conclusion is there is no a significant value correlation between nutritional status and over-retained primary tooth among children aged 13 to 15 years.]]>
<![CDATA[Tempe Kedelai (Rhizopus oligosporus) sebagai Alternatif Anti Inflamasi ]]>
<![CDATA[Athiyya Husna]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Bambang Ristiono]]>
<![CDATA[ Andalas Dental Journal Vol 9 No 2 (2021): Andalas Dental Journal ]]>
Publisher : <![CDATA[Faculty of Dentistry Universitas Andalas ]]>
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DOI: 10.25077/adj.v9i2.183
<![CDATA[Background: Inflammation is a protective mechanism of the immune system due to tissue damage caused by infectious and non infectious agents. The most widely used synthetic drugs in treating the inflammation is NSAIDs (Non Steroidal Anti Inflammatory Drugs) but long-term use of NSAIDs can cause undesirable side effects. Tempeh (R. oligosporus) is one of the processed soy products that is made through the fermentation process by Rhizopus sp. Tempeh has many benefits for health, one of which is anti-inflammatory. According to some research results, tempeh is recognized as having an anti-inflammatory role. The mechanism of tempeh as an anti-inflammatory, namely by maintain a balance between reactive oxygen species (ROS) and antioxidants in the body, increasing the production of anti-inflammatory cytokines (IL-10), suppressing the activation of NF-kB. This process can suppress the expression of iNOS and COX-2 and inhibit several inflammatory mediators, such as TNF-α, IL-1β and NO. Objective: The purpose of this study was to investigate anti-inflammatory activity of soybean tempeh (R.oligosporus) and find out the potential of active compounds in soybean tempeh that play role as anti-inflammatory. Method: The study was conducted by collecting and examining of various literatures on potential of soybean tempeh (R.oligosporus) in suppressing inflammatory response. Conclusion: The active compounds found in soybean tempeh (R. oligosporus) is able to suppress the inflammatory response.]]>
<![CDATA[REVIEW: TEKNOLOGI PREPARASI PATI NANOPARTIKEL DAN APLIKASINYA DALAM PENGEMBANGAN KOMPOSIT BIOPLASTIK ]]>
<![CDATA[Maryam Maryam]]>;
<![CDATA[Anwar Kasim]]>;
<![CDATA[Novelina Novelina]]>;
<![CDATA[Emriadi Emriadi]]>
<![CDATA[ JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 15, No 2 (2018): VOL 15 NO 2 DESEMBER 2018 ]]>
Publisher : <![CDATA[Politeknik ATI Padang ]]>
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<![CDATA[The use of starch in the industry is very wide, both in the field of food and non-food. Therefore, to expand its application, starch needs to be modified in the form of starch nanoparticles. Nanoparticle technology will improve starch characteristics as a result; it has low suspension viscosity at relatively high concentrations, and has high binding strength due to a large active surface area. In general, there are three ways of making nanoparticle starch, namely acid or enzymatic hydrolysis, regeneration (precipitation) and mechanical treatment. The purpose of this study was to conduct a journal review relating to the preparation method of starch nanoparticles and their application in the development of bioplastic composites. The development of bioplastics is currently constrained by the results of bioplastic characteristics; both the physical and mechanical properties produced are still low. Nanoparticle technology developed to improve the characteristics with the addition of nano-sized material (nanoparticles) into bioplastic formulas that produce nanocomposites. The problem faced in the development of nanoparticle starch is that the preparation method used is not ready for commercial production. The resulting yield is still low and the process steps are too long. One way to overcome this is to adapt the nanoparticle starch preparation method that is more efficient for the production scale.]]>
<![CDATA[EKSTRAK DAUN KECAPI SEBAGAI INHIBITOR KOROSI BAJA DALAM MEDIUM ASAM KLORIDA ]]>
<![CDATA[Sari Wahyuni]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Suryati Suryati]]>
<![CDATA[ JURNAL KATALISATOR Vol. 7 No. 1 (2022): Jurnal Katalisator Volume 7 Nomor 1, April 2022 ]]>
Publisher : <![CDATA[LLDIKTI X Sumbar, Riau, Jambi, Kepri ]]>
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DOI: 10.22216/katalisator.v7i1.921
<![CDATA[Kecapi (Sandoricum koetjape, (Burm.f.) Merr) leaf extract contains secondary metabolites such as alkaloids, flavonoids, phenolics and triterpenoids which may be an environmentally friendly corrosion inhibitor. The method used in extraction of kecapi leaves in 1 N hydrochloric acid as a steel corrosion inhibitor was carried out by weight loss, FTIR (Fourier Transform Infrared) and SEM (Scanning Electron Microscopy) methods. The data from the weight loss method revealed that the rate was inversely proportional to the concentration of the inhibitor and directly proportional to the temperature, while the value of the efficiency inhibition was directly proportional to the temperature and concentration of the inhibitor. The maximum efficiency inhibition value obtained was 86.61% at an extract concentration of 6 g/L and an immersion temperature of 60oC. The adsorption of kecapi leaf extract followed the Langmuir adsorption isotherm.]]>
<![CDATA[Thermodynamic Properties and Characterizations of Chitosan Nano-Particles Corrosion Inhibition on The Surface of Mild Steelin Peat Water Media ]]>
<![CDATA[Maria Erna]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Admin Alif]]>;
<![CDATA[Syukri Arief]]>
<![CDATA[ ALCHEMY Jurnal Penelitian Kimia Vol 12, No 1 (2016): March ]]>
Publisher : <![CDATA[UNIVERSITAS SEBELAS MARET (UNS) ]]>
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DOI: 10.20961/alchemy.12.1.936.27-35
<![CDATA[The thermodynamic properties and characterizations of corrosion inhibition of chitosan nano-particles on the surface of mild steel in peat water media had been studied using weight loss method at temperatures of 30 - 50 oC. Steel surfaces were characterized by FT-IR spectra and SEM-EDS morphology photos. The research found that the value of DGo approaching -40 kJmol-1. The negative value of Gibbs free energy shows that the adsorption of inhibitor molecules on the surface of mild steel was achemisorption and it occurred spontaneously. Meanwhile, the values of DHo is also negative confirming that the adsoprtion of inhibitor molecules is an exothermic process. The value of DSo obtained is positive, it indicates hat the inhibitor molecules were adsorbed spontaneously on the mild steel surface. The analysis on mild steel surfaces hows that the nano-particle chitosan was adsorbed on the steel surface to form the complex compounds.]]>
<![CDATA[Bark Characteristics of Acacia auriculiformis A. Cunn. ex Benth. and Acacia mangium Willd. From Industrial Plantation Forest ]]>
<![CDATA[Sri Mutiar]]>;
<![CDATA[Anwar Kasim]]>;
<![CDATA[Emriadi]]>;
<![CDATA[Alfi Asben]]>
<![CDATA[ Jurnal Penelitian Kehutanan Wallacea Vol. 9 No. 1 (2020) ]]>
Publisher : <![CDATA[Foresty Faculty of Hasanuddin University ]]>
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DOI: 10.18330/jwallacea.2020.vol9iss1pp43-49
<![CDATA[Increasing the value of bark can be known through the characteristics of the bark such as physical properties, the grade of fiber quality and the chemical composition of the bark. The purpose of this study is to find out the characteristics of the bark of the acacia plant species (i.e. Acacia auriculiformis and Acacia mangium) of Industrial Plantation Forest. The characteristics of the bark observed includes physical properties, quality grade of fiber and chemical composition. The results of this study showed that the bark density, thickness and water content of A. auriculiformis were 1.18g/cm3, 1.55 mm and 35.27% respectively, while, the bark density, thickness and water content of A. mangium were 0.95 g/cm3, 1.23 mm and 48.21% respectively. The fiber qualities of both plants are classified as grade III. The extractive substance levels of A. auriculiformis and A. mangium were 23.06% and 20.63%, respectively. Based on the analysis with GCMS it can be seen that the main compounds dissolve-hexane from species A. auriculiformis were 2-phenyl phenol 33.6% and palmitic acid 13.5%. In the species A. mangium the main compounds soluble n-hexane were palmitic acid 28.97% and oleic acid 21.43%. The results of the analysis showed that these two bark species could potentially to be adhesives materials, tanning agent, particle boards, and inhibitors at the rate of corrosion of steel.]]>
<![CDATA[Pengaruh Variasi Prekursor Terhadap Morfologi dan Aktivitas Antibakteri Nanopartikel Tembaga Menggunakan Reduktor Ekstrak Daun Gambir ]]>
<![CDATA[Netri Elisma]]>;
<![CDATA[Emriadi Emriadi]]>;
<![CDATA[Ahmad Darmawi]]>
<![CDATA[ REACTOR: Journal of Research on Chemistry and Engineering Vol 4, No 2 (2023): Published in December 2023 ]]>
Publisher : <![CDATA[Politeknik ATI Padang ]]>
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DOI: 10.52759/reactor.v4i2.109
<![CDATA[Research on synthesis copper nanoparticles has been carried out by the bioreduction method with a green synthesis approach using extracts of gambir leaves (Uncaria gambir Roxb). Gambir leaf extract contains polyphenol compounds uses as a natural reducing agent to reduce copper cation from variations of prekursor (CuSO45.H2O, Cu(NO3)2.3H2O and CuCl2.2H2O). The formation of copper nanoparticles (CuNP) colloid is visually shown by color change from light brown to dark brown. Absorption peak in UV-Vis spectrophotometer analysis at 405 -427 nm which is a specific wavelength of copper nanoparticles base on phenomenon of Surface Plasmon Resonance (SPR). The X-Ray Diffraction (XRD) analysis showed formation of CuNP with a face centered cubic (fcc) crystal structure. The result of Transmission Electron Microscope show the synthesized CuNP was spherical with particle size diameter 15nm for CuSO4 prekursor, 25 nm for Cu(NO3) prekursor and 28 nm for CuCl2 prekursor. The size of nanoparticles influenced of type prekursor anions. The antibacterial activity of the synthesized nanoparticles was also tested using pathogenic bacteria Escherichia coli and Staphylococcus aureus. The results showed that copper nanoparticles were promising antibacterial agents. Antibacterial activity test on copper nanoparticles were found to have higher antibacterial activity against Gram positive bacteria S. aureus than Gram negatif E. coli.]]>
<![CDATA[Synergetic Effect of Potassium Iodide and Miana (Coleus scutellaroides (L.) Benth.) Leaves Extract on Mild Steel in HCl Medium ]]>
<![CDATA[Sanaq Elfira Putri]]>;
<![CDATA[Vira Anggita Gusniardi]]>;
<![CDATA[Suryati Suryati]]>;
<![CDATA[Emriadi Emriadi]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 6 (2023): December 2023 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v11i6.9810
<![CDATA[Due to its low carbon content, mild steel is prone to corrosion. Therefore, corrosion inhibitors are needed to decrease the corrosive rate of mild steel. This research aims to investigate the influence of adding potassium iodide to miana leaves extract (Coleus scutellaroides (L.) Benth.) (MLE) on the corrosion rate of mild steel, identify the type of adsorption, synergistic effects and characterize the surface of mild steel both before and after the addition of potassium iodide. The weight loss method is employed to test the corrosion rate, and the type of adsorption is identified through thermodynamic calculations. Surface characterization is evaluated using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). As potassium iodide is added, the weight loss findings show an increase in inhibitory efficiency. When potassium iodide concentration was 0.4 g/L and temperature was 30°C, the maximum inhibitory efficiency was attained, which was 92.784%. Characterization analysis indicates the interaction between potassium iodide and MLE with the surface of mild steel. This research has not been explored yet and is expected to provide information on the use of potassium iodide and MLE as environmentally friendly corrosion inhibitors.]]>
