Eksakta : Berkala Ilmiah Bidang MIPA
Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) is an open access journal and peer-reviewed that publishes either original article or reviews. The journal is dedicated towards dissemination of knowledge related to the advancement in scientific research. The prestigious interdisciplinary editorial board reflects the diversity of subjects covered in this journal. Under the realm of science and technology, the coverage includes environmental science, pure and applied mathematics, agricultural research and engineering, biology, biotechnology, bioinformatics, Healthcare sciences (including clinical medicine, preventive medicine & public health), physics, biophysics, computer science, chemistry and bioengineering, to name a few. This Journal Is Published at 3 Month intervals on January-Marc, April-June, July-September and October-December
Articles
310 Documents
<![CDATA[Natural Feed Preference Fejervarya cancrivora L. and Fejervarya limnocharis L on the West Coast of Sumatra Island ]]>
<![CDATA[Reni susanti]]>;
<![CDATA[Ramadhan Sumarmin]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/228
<![CDATA[Anuran is an animal with a short body size, wide and stiff. The head and body are united and have no tail. Ecologically, Anuran plays an important role in the food chain as secondary consumers. It is known that all types of Anuran are carnivores with a diet such as arthropods and worms. This study aims to determine the natural food preferences of F. cancrivora and F. limnocharis on the West Coast of Sumatra Island. This research is a descriptive study which was conducted in 3 stages, namely the first stage of taking Anuran in the field, the second stage of washing the stomach and the third stage of identifying the type of feed. The results showed that the type of feed that was mostly found in the stomachs of the two frogs was the Hymenoptera order from the Insect class. The overlapping niche values of the two types of frogs in the village of Setara Nanggalo show a highly competitive tendency, the conclusion is that these two types of Anuran food have the same diet and are sympathetic populations.]]>
<![CDATA[Bioactivity of Torch Ginger Umbut Extract (Etlingera elatior) Against Heal Wounds of Mice (Mus musculus) ]]>
<![CDATA[Mhd Zalil Efendi]]>;
<![CDATA[Ramadhan Sumarmin]]>;
<![CDATA[M. Syukri Fadil]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/230
<![CDATA[Torch ginger has a wide range of good antimicrobial, antioxidant, anticancer, larvicidal and repellent activities. Active compounds in Torch ginger that affect pharmacological activities are phenols, polyphenols, flavonoids, and terpenoids. Based on these ingredients Torch ginger can be used to heal wounds. This study aims to observe the effect of Torch ginger Umbut extract on wound healing in mice. This study hopes to add information about the effect of Torch ginger umbut extract on the healing of cuts in mice so that it can be another alternative for wound healing and can be a reference for other researchers. This study used a completely randomized design with 5 treatments and 3 replications. Tests carried out on adult male mice. The results showed that the optimal wound healing in P2 is treatment with 10% Torch ginger umbut extract which requires a range of wound healing 7-8 days. Based on these results, Torch ginger umbut extract can heal wounds.]]>
<![CDATA[Optimization of the Optimum Condition of Mushroom Light Excitation (Neonothopanus sp) Bioluminescence ]]>
<![CDATA[Qurniawati, Mila]]>;
<![CDATA[Wulan, Ratna]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol22-iss1/232
<![CDATA[On the South Coast of West Sumatra was found a luminous mushroom, the Neonothopanus sp. The light-emitting characteristics of this mushroom are not yet known. For the use of this bioluminescence in various fields, information on the optimal light emission conditions of the mushroom is required. This study aims to determine the optimal conditions of light emission from mushrooms such as temperature and pH. In this study, the measurement of the light spectrum of mushrooms with variations in temperature and temperature was carried out. The measuring instrument used is a nano photometer. The results showed that the maximum intensity occurred at a wavelength of 505 nm in the green area. The maximum intensity occurs at a temperature of 15 oC and pH 8.]]>
<![CDATA[The Effect of Heavy Metal Pollutants on Bioluminescence Intensity of Luminous Mushrooms (Nenothopanus sp) ]]>
<![CDATA[Witriani Marvinatur Ihsan]]>;
<![CDATA[Ratnawulan Ratnawulan]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/235
<![CDATA[In the South Coastal Forest area, West Sumatra, a luminous mushroom with the species Neonothopanus Sp. This research was conducted with the aim of seeing the effect of heavy metals on the bioluminescence reaction of luminous mushrooms. Starting from the effect of heavy metal concentrations on the intensity and inhibition coefficient of luminous mushroom biolumination. From the measurement results, the maximum intensity value of luminous mushrooms is 499.6 au occurring at a wavelength of 505 nm. At a wavelength of 505 nm, visible light is produced in green. The results obtained are in accordance with observations, because the light emitted by the glowing mushroom is green. If the concentration of heavy metals is greater, the intensity of the bioluminescent fungus (Neonothopanus sp) will decrease. The type of heavy metal affects the intensity of the fungus biolumination. The greatest decrease in intensity occurred in copper (Cu) and iron (Fe), zinc (Zn) and lead (Pb). If the heavy metal concentration is greater, the inhibition coefficient will be smaller. The greatest inhibition coefficient due to the presence of heavy metals occurs in copper (Cu) then iron (Fe), zinc (Zn) and the smallest is lead (Pb).]]>
<![CDATA[Physiological Aspects Identification of the Aloe Vera Grown at Sukoharjo and Wonogiri District, Central Java ]]>
<![CDATA[Eskundari, Ratna Dewi]]>;
<![CDATA[Rokhimah Hanik, Nur]]>;
<![CDATA[Harsono, Sri]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 2 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol22-iss2/238
<![CDATA[The aloe vera is known as an ornamental plant that can survive almost all elevations and has a myriad of benefits for humans. This plant can plant at various altitudes, including in the districts of Sukoharjo and Wonogiri. This study aimed to identify the physiological and morphological aspects of aloe vera (Aloe vera) planted in Sukoharjo and Wonogiri districts. Parameters measured were ambient temperature, leaf length, number of stomata, and transpiration rate. Stomata number parameters were calculated using the leaf extension count method under a microscope, while for transpiration rate analysis, cobalt chloride paper was used. The results of this study showed no significant differences in the parameters of average temperature, leaf length, number of stomata, and transpiration rate. The results of this study can be used as a suggestion, especially for Sukoharjo district policy makers, that the aloe vera plant has the potential to become one of the leading agricultural commodities.]]>
<![CDATA[The Extraction of Essential Oil from Piper Cubeba by Using Solvent Free Microwave Extraction Method ]]>
<![CDATA[Norma Eralita]]>;
<![CDATA[Siti Khuzaimah]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/239
<![CDATA[This research aims to study the production of essential oil from Piper Cubeba using the solvent-free microwave extraction (SFME) method. Before extraction, the raw materials are prepared in the form of grains and powders to vary the size of the raw materials. Time variation was carried out at microwave power 180 Watt Analyses were then performed on the resulting essential oil using both physical and chemical tests of density and solubility with 96% alcohol. Analyses of chemical compounds within the essential oil were then performed using the Gas Chromatograph Mass Spectrometry (GC-MS). It was found that the production of essential oil from Piper Cubeba using the SFME method was affected by microwave power, grain size, and treatment duration. Results from physical and chemical analyses revealed that the resulting cubeb oil has 0.86 g/mL density, which means that essential oil produced using the SFME method is lighter compared than those produced using MAHD methods. Results from GC-MS analyses showed eight components detected from the production of essential oil from Piper cubeba using the SFMEmethod; Copaene (39.28%), Cubebene (23.83%), Isoledene (11.66%), Naphthalene (6.65%), Phellandrene (5.81%), Asarone (5.71%), Cadidene (4.90%), and Caryophyllene (2.16%) which contents belong to the sesquiterpene group]]>
<![CDATA[Study of Local Duck Rations from Colocasia Esculenta Flour on Egg Production and Cholesterol Content ]]>
<![CDATA[Zasmeli Suhaemi]]>;
<![CDATA[Sari Gando Hayati]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/240
<![CDATA[Colocasia esculenta is the plants feed ingredients shown to reduce the cholesterol content of livestock products, such as in ducks. This study aims to examine the use of Colocasia esculenta Scho. plant in local duck rations on egg production, and the content of cholesterol and triglycerides. As a treatment in this study were the level of use of Colocasia esculenta meal (CM), 0%, 5%, 10%, 15% and 20%, with 4 replications, which designed with a completely randomized design. As many as 80 ducks in the laying period were used, ranging in age from 19 to 30 weeks. The data obtained showed that an increasing level of CM up to 10% resulted in increased egg production, egg weight and decreased feed convertion ratio. Conversely, the blood and yolk total cholesterol and triglyceride content actually decreased until the level CM was 20%. It was concluded that the use of CM up to a level of 10% could improve the performance of egg production, and the use of up to a level of 20% decreased the cholesterol and triglyceride content of blood and egg yolk. This is an important role about those subject for required healthy food for human nutrition]]>
<![CDATA[Algorithm of Time and Frequency Remote Calibration System of SNSU-BSN ]]>
<![CDATA[A. Mohamad Boynawan]]>;
<![CDATA[Ratnaningsih Ratnaningsih]]>;
<![CDATA[Windi Kurnia P]]>;
<![CDATA[Yulita Ika P]]>;
<![CDATA[Asep Hapiddin]]>;
<![CDATA[Muhammad Azzumar]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/241
<![CDATA[National Measurement Standards-National Standardization Agency of Indonesia (SNSU-BSN) as the National Metrology Institute of Indonesia has provided time and frequency calibration services for customers. Time and frequency equipment should be calibrated to traceable to the SI units. The calibration process can be carried out in a calibration laboratory. However, some measuring devices cannot be sent to the calibration laboratory. One of the devices that cannot be sent to the calibration laboratory is Cesium atomic clock. It must be calibrated to get the time difference with the local coordinated universal time (UTC), namely UTC(IDN). Therefore, to calibrate the Cesium atomic clock, a remote calibration method is needed. The remote system is also intended to conduct the calibration more effectively and efficiently. This method requires two Global Positioning System (GPS) receiver devices placed on the client-side and a calibration laboratory. For this reason, an algorithm for remote calibration has been developed. The algorithm has been tested to calibrate Cesium-3 of SNSU-BSN against UTC(IDN). The time difference between Cesium-3 and UTC(IDN) was 5.8 microseconds by using the algorithm. Based on the algorithm that has been built, it was concluded that the algorithm can be used to perform remote calibration for the related customer.]]>
<![CDATA[Comparison of Nutritional Content of Spinach (Amaranthus gangeticus L.) Cultivated Hydroponically and Non-Hydroponically ]]>
<![CDATA[Fevria, Resti]]>;
<![CDATA[Alicia Farma, Siska]]>;
<![CDATA[Vauzia]]>;
<![CDATA[Edwin, Edwin]]>;
<![CDATA[Purnamasari, Devi]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol22-iss1/243
<![CDATA[The objectives of this study to determine the comparison of the nutritional content of spinach cultivated hydroponically and non-hydroponically, especially the content of Vitamin C. This research was conducted at the Wire House Biology Laboratory of Padang State University in May - July 2020. This research is a descriptive study. The analysis was carried out Spinach Nutrition. Hydroponic spinach samples were obtained from the Hydroponic Community of West Sumatra in Alai Padang, while the non-hydroponic samples were purchased at Pasar Raya Padang, the analysis of vitamin C content was carried out by the Spectrophotometric Method. From the research that has been done, it is found that the average content of hydroponic spinach vitamin C is 1.45 ppm and non-hydroponic 1.60 ppm. The conclusion of the research is that the content of Vitamin C in hydroponic cultivated spinach is lower than that of spinach cultivated non-hydroponically.]]>
<![CDATA[Development of COVID-19 Case in District and City of Jambi Province with Exponential Smoothing Methode ]]>
<![CDATA[Sherli Yurinanda]]>;
<![CDATA[Cut Multahadah]]>;
<![CDATA[Reni Aryani]]>
<![CDATA[ EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 21 No. 2 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) ]]>
Publisher : <![CDATA[Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia ]]>
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DOI: 10.24036/eksakta/vol21-iss2/244
<![CDATA[Jambi Province is one of the province in western Indonesia, which was affected by COVID-19 in March and until mid-September the number confirmed positive reached 345 people. Until now COVID-19 has become a pandemic.Based on this data, it is necessary to predict the number of COVID-19 in Jambi Province, including every district in Jambi city. Double exponential smoothing: The Holt two-parameter method determines the value of the trend with a tang parameter different from the parameter used in the original series. The principle of forecasting using multiple exponential smoothing: The Holt two-parameter method uses two smoothing constants with values between 0 and 1. Based on the results of forecasting using the double exponential smoothing by Holt method, it can be seen that the number of confirmed cases of Covid-19 in each region in Jambi Province continues to increase. This case is estimated to increase to 352 people in mid-October.]]>
