Indonesia Conference Directory

Corresponding Author
Afrizal Afrizal

Institutions
Department of Chemistry Universitas Negeri Jakarta

Abstract
The blending process of cholesterol acrylate and ITO nanoparticle was performed using UV curing technique at various the concentration of ITO nanoparticles. In this research using variation concentration of ITO nanoparticles. Polymer Cho-ITO nanoparticles have succeeded in becoming a composite. Pattern of X Ray Diffraction of Cholesteryl acrylate-Indium Tin Oxide nanoparticle (Cho-ITO) at ITO 10% w/w showed peak for Cholesteryl acrylate in 2θ at 2,6782; 5,2275; dan 15,8050 with value of d spacing (001) was 32,96 Å. For ITO in 2θ at 30,6244o; 35,5105; 45,6814; 51,0400; dan 60,6473. therefore pattern of XRD of Cho-ITO at ITO 20% w/w showed peak for Cholesteryl acrylate in 2θ at 2,6372; 5,2022; dan 15,7867 dengan nilai d spacing bidang (001) sebesar 40,09 Å. For ITO in 2θ at 30,5685; 35,4428; 41,8550; 50,9846; 60,6252. increasing value of d spacing for (001), that d spacing for cholesteryl acrylate 32,60 Å when added was by ITO 10% w/w d spacing increase untuil 32,96 Å. When added ITO 20% w/w value of d spacing until 40,09 Å. This phenomenon explained that ITO nanopartikel filled space in crystalline at polymer of cholesteryl acrylate.

Keywords
XRD pattern of polymer Cholesteryl acrylate-ITO, ITO nanoparticle, Composite, Photopolymerization, UV light

Topic
Chemistry

Link: https://ifory.id/abstract/VGtkd7exvqHY

Corresponding Author
Agung Yuda Sulaksana

Institutions
Teknik Elektro, FPTK, Universitas Pendidikan Indonesia

Abstract
ABSTRACT Street Lighting (PJU) is lighting designed to support for safety and provide comfort for road users with energy-efficient lamp designs. This paper aims to describe the design results with DIAlux using LED lights, to obtain efficient results and according to SNI: 7391: 2008. The selection of efficient street lighting must take into account the following factors: price factors, loss of loss to conductors, and long life that supports smart lighting. The results showed that public street lighting that had been redesigned with the mesopic method gave results that met SNI: 7391: 2008 and were more efficient.

Keywords
Street lighting, DIALux, LED, efficiency energy

Topic
Electrical Engineering

Link: https://ifory.id/abstract/neucg8ARhEQD

Corresponding Author
Rizky Kurniasih

Institutions
a) Students of Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology
Jalan Raya ITS, Surabaya 60111, Indonesia
*always.qqs[at]gmail.com
b) Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology, Surabaya

Abstract
Construction Service Unit IV Surabaya is one of the work units of Ministry of Public Works and Housing. This work unit has a workshop and dormitory building as assets, both of which function to support its duties in carrying out construction training. However, the building utilization rate is relatively low, so the building is rarely used (idle) and has not been used to its optimal potential in supporting the function (underutilized). The purpose of this study was to analyze the strategies for workshops and dormitories building utilization to support construction training. The method used in determining the strategy is internal environmental analysis with Resource-Based View (RBV) and external environment analysis with PESTLE analysis. The strategy formulation includes input stage with EFE and IFE Matrix, matching stage with SWOT Matrix, IE Matrix and Grand Strategy Matrix, and decision stage with QSPM. This research has succeeded in getting a strategy that is in accordance with the conditions of the work unit, namely market development strategy, market penetration, and product improvement.

Keywords
Building Asset, Building Utilization, RBV, PESTLE Analysis, Strategy Formulation

Topic
Civil Engineering

Link: https://ifory.id/abstract/D7uEaM2PUmwQ

Corresponding Author
RIDHA HUSLA

Institutions
a) Department of Petroleum Engineering, Trisakti University, Jl. Kyai Tapa No. 1, Jakarta 11440, Indonesia
*ridhahusla94[at]gmail.com

Abstract
RM field is one of the fields located in Java Island. RM Field has great potential to be developed, In the RM field water injection has been done to increase the value of oil production. To find out the effect of heterogeneity on the RM field, dykstra parson was analyzed. The layers analyzed in the RM field were layers 22, 23 and 24. The results of the analysis for the Vdp value at layer 22 is 0.828, the Vdp value at layer 23 is 0.814, and the Vdp value in layer 24 is 0.812. With the dykstra parson analysis, it can be seen that RM field reservoirs tend to be heterogeneous, this is seen from the Vdp value which approaches the number 1, which is equal to 0.812 to 0.828 In addition, a mobility ratio analysis was carried out using rocktype 1 on the RM field and the M value on rocktype 1 was 0.3429. with a value of M <1 which means it can produce high sweeping efficiency and produce good oil recovery.

Keywords
Heterogeneity, Dykstra Parsons, Mobility Ratio, Water Injection

Topic
Industry Engineering

Link: https://ifory.id/abstract/hNvWb3MQ7gfR

Corresponding Author
Maria Paristiowati

Institutions
a) Department of Chemistry Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jakarta 13220, Indonesia
* maria.paristiowati[at]unj.ac.id

Abstract
This study aims to analyze the profile of technological pedagogical and content knowledge (TPACK) chemistry teachers at one of the schools in Jakarta. The criteria for the teachers analyzed are professional teachers who have been certified and have more than 20 years of teaching experience. The method used in this study is a qualitative descriptive research method. The data sources were collected through the TPACK questionnaire referring to the Schmid instrument (2009), lesson plan analysis, observation of the learning process, and interviews. The results show that chemistry teachers can apply learning methods that vary each meeting according to the characteristics of acid-base material. The teacher also utilizes technology information & communication (ICT) based learning media to simplify and clarify material delivery. It can be concluded that teachers have pedagogical content knowledge (PCK) and technological content knowledge (TCK). The use of ICT media such as interactive power points, videos and mobile phones to support selected learning methods, shows that teachers are also competent in technological pedagogical knowledge (TPK). The results of the study concluded that the teacher had integrated all TPACK components into acid-base learning.

Keywords
Technological pedagogical and content knowledge; chemistry teacher profiles;

Topic
Chemistry

Link: https://ifory.id/abstract/GY7bMhunUzq3

Corresponding Author
TARYUDI .

Institutions
Faculty of Engineering, Universitas Negeri Jakarta
Jakarta, Indonesia
Email: (*)taryudi[at]unj.ac.id

Abstract
Sign language is one of the most effective ways to communicate with deaf people. However, not everyone is able to use sign language. Therefore in this study, a sign language display system was created using a hand robot that was moved through an Android-based application on a smartphone to overcome this problem. The design and development of the system begin from the manufacture of hardware consisting of one hand robot with 11 servo motors as the actuators, the Arduino Mega 2560 microcontroller as the main controller and a Bluetooth module for wireless communication between hand robot and smartphone. Then software development is carried out on the hand robot controller and android based application on a smartphone. Furthermore, system testing is carried out by validating the results of the letters and numbers shown by hand robot with gestures in the Indonesian Language Signaling System Dictionary (SIBI). The results show that the hand robot has been able to display letters and numbers according to the instructions given by an Android-based application on a smartphone with an 80% accuracy rate.

Keywords
Robot hand, Indonesian sign language, Arduino, Android

Topic
Electronics Engineering

Link: https://ifory.id/abstract/rLNTn87E3K9Q

Corresponding Author
Rini Agustina

Institutions
a) Science and Technology Faculty, Universitas Kanjuruhan Malang
b) Information Technology, State Polytechnic of Malang
c) Faculty of Engineering, State University of Malang

Abstract
Mathematics is a very important branch of science mastered early to be able to create future technology. The fact is that currently mathematics is less favoured by students for reasons that are difficult and boring because they lack understanding of the concept and how to calculate it. According to an international study that reported the results of the ability of Indonesian students from PISA (program for international student assessment) in 2015 Indonesia was ranked 63rd out of 69 countries. Based on observations in several junior high schools in Malang City, data on learning outcomes of students who did not understand mathematical material were obtained, from 120 students there were only 45% (54 students) getting more than the minimum standard of mastery learning (KKM)> 75, due to lack of interest and student motivation to learn mathematics. A game is one solution that is considered appropriate for students who experience learning difficulties because psychologically children prefer learning in the form of games. The method used in this study was the Multimedia Development Life Cycle (MDLC), while the educational game design was developed using the Unity application. Games that have been made have succeeded in attracting students interest in learning and can increase the value of student learning outcomes from 120 students who have succeeded in exceeding the KKM standard of 85% or equal to 102 students, this shows an increase of 40% from previous student data.

Keywords
Android, Educational Games, MDLC, Mathematics, learning media, Unity

Topic
Computer Science

Link: https://ifory.id/abstract/VJckDPXLWCpR

Corresponding Author
Dedi Rohendi

Institutions
Universitas Pendidikan Indonesia

Abstract
The concept of mathematical applications in engineering is one material that is difficult for students to understand, because besides having to understand the technical concepts discussed, they must also be able to associate with mathematical concepts. One aspect that needs more understanding of this concept is how to visualize the technical concepts, so that mathematical rules can be modeled. Therefore, the purpose of this research is to develop multimedia animation in the concept of mathematical applications in the field of engineering. The method used in this study is to analyze the development needs of multimedia, both software, hard, material application techniques that use mathematics, then design, development, and testing. The results of the study show that multimedia animation in the application concept of mathematical techniques is able to explain abstract concepts from mathematical concepts in engineering. The test results show that this multimedia is deemed feasible to use.

Keywords
application concepts, mathematical engineering, multimedia animation, visualization, mathematical rules.

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/pWTqkuCd9BAa

Corresponding Author
Andre Dwijanto Witjaksono

Institutions
a) Faculty of Economics, Universitas Negeri Surabaya,
Surabaya 60231, Indonesia, *andredwijanto[at]unesa.ac.id
b) Faculty of Engineering, Universitas Negeri Surabaya,
Surabaya 60231, Indonesia

Abstract
Green Supply Chain Management (GSCM) is an operational initiation to overcome environmental problems that many organizations experience, including Small and Medium Enterprises (SMEs). This study aims to determine the effect of the industrial environment on GSCM implementation and its impact on organizational performance in food and beverage SMEs in the East Java province, Indonesia. The survey and interviews were conducted with 76 Food and Beverage Association members. The variables studied included the industrial environment, GSCM, and organizational performance, and decentralization in moderating GSCM towards Organizational Performance. Data was analyzed using Partial Least Square (PLS). The results show that the Industrial environment has a significant effect on Organizational Performance, but does not have a significant effect on GSCM. GSCM does not have significant effect on Organizational Performance. However, decentralization was not able to moderate the influence of the Industrial Environment on Organizational Performance. The nature of the centralized authority on SMEs needs further testing given that such rapid environmental changes certainly require a rapid response in anticipating the speed of market changes. Also, how should the influence of a decentralized organizational structure on SMEs in various countries or in the country with foreign ownership, need to be investigated further.

Keywords
GSCM, Industrial environment, Decentralization, Organizational performance, Food and beverage SMEs

Topic
Management Science

Link: https://ifory.id/abstract/DCf2jvhpR6JP

Corresponding Author
Neneng Siti Silfi Ambarwati

Institutions
1Department of Cosmetology, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, East Jakarta, 13220, Indonesia
2Department of Phytochemistry, Faculty of Pharmacy, Universitas Indonesia, UI Depok Campus, Depok, 16424, Indonesia
3 Department of Pharmacognosy, Faculty of Pharmacy, Universitas Pancasila, Jl. Srengseng Sawah, Jagakarsa, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta, 12640, Indonesia.

Abstract
Background. Elastase is a proteinase enzyme that can reduce elastin by dividing specific peptide bonds. Therefore, the inhibition of elastase activity in the dermis layer can be used to maintain skin elasticity. Materials that can inhibit elastase activity can be a cosmetic ingredient in dealing with skin aging. Increased desire to maintain healthy skin without chemicals, encourages the use of materials from natural sources such as plants from Indonesia, a country that has a high biodiversity, including Garcinia latissima from the Clusiaceae family. Purpose. The purpose of this study is to know G. latissima has the activity as an inhibitor of elastase enzyme or not. Methods. Plant extraction was carried out using maceration successively methods. The inhibition activity of elastase enzyme was carried out by measuring the kinetic enzyme N-succ (Ala) 3-Nitroanilide conversion to p-nitroaniline (substrate) spectrophotometry at 405 nm and using porcine pancreatic elastase (PPE) as an enzyme. Results. The results showed that the G. latissima methanol and ethyl acetate extract were active as elastase enzyme inhibitors. Conslusion. G. latissima extract can maintain skin elasticity.

Keywords
Garcinia latissima Miq., elastase enzyme, maceration succesively

Topic
Chemistry

Link: https://ifory.id/abstract/EFjyC3ZWMvVx

Corresponding Author
Pande Ayu Naya Kasih Permatananda

Institutions
(a). Faculty of Medicine, Nursing, and Public Health, Universitas Gadjah Mada, Yogyakarta, Indonesia
*nayakasih[at]gmail.com
(b). Faculty of Medicine and Health Science, Universitas Warmadewa, Denpasar, Indonesia
(c). Faculty of Medicine, Universitas Tadaulako, Palu, Indonesia

Abstract
Inflammation is a local reaction from living tissue or cells to a stimulation or injury. This anti-inflammatory test aims to determine the effect of anti-inflammatory treatment on changes in edema volume in rat-s feet after induced by carrageenan. Anti-inflammatory that is used in this research is celecoxib. Celecoxib is a non-steroidal anti-inflammatory agent that works by inhibiting selective cyclooxigenase enzymes. In this pharmacological screening test, 2 wistar strains of white rats were tested, which were weighed before anti-inflammatory administration. The rats were divided into 2 groups, namely the negative and positive control group. As for the negative control, the treatment was given 0.9% NaCl as much as 4 mL per oral, while for positive control was given celecoxib 100 mg / 55.5 ml. the volume of edema in the rat-s feet was measured using pletismometer. We found that there was no significant difference in the volume of edema between the group given 0.9% NaCl and the group given celecoxib. Therefore, we conclude that celecoxib as an anti-inflammatory agent is not able to inhibit edema in rat-s feet.

Keywords
anti-inflammatory, rats, celecoxib

Topic
Pharmacology

Link: https://ifory.id/abstract/8cXQtkfA2wvM

Corresponding Author
Ana Widiana

Institutions
(a) Faculty of Tarbiyah and Teaching Programme. UIN Sunan Gunung Djati Bandung.
Jl. AH. Nasution No. 105. Bandung. West Java. Indonesia
(b) Faculty of Science and Technology. UIN Sunan Gunung Djati Bandung.
Jl. AH. Nasution No. 105. Bandung. West Java. Indonesia
*anawidiana[at]uinsgd.ac.id

Abstract
Cajuput plants (Melaleuca cajuputi Powell) and its waste are one of the plants that can produce essential oils. Cajuput plant essential oil has the largest compound component, 1.8 cineol which has the ability as an antibacterial to kill pathogenic bacteria. The purpose of this study was to determine the antibacterial activity of cajuput leaf waste extract against pathogenic bacteria and find out the category of inhibition zones formed from extracts of cajuput leaf waste. This study used a completely randomized design method. Cajuput leaf waste used has a shelf life of 0 months, 2 months and 4 months old. The pathogenic bacteria used consisted of 17 isolates, each treatment was repeated twice. The results showed that cajuput leaf extract had antibacterial activity known by the formation of inhibitory zones. The inhibitory zone in the extract of the 0-month leaf waste was greater than in the leaves extract of leaves of 2 months and 4 months. The diameter of the inhibition zone is at most 13 mm and at least 1 mm. With these results, it can be concluded that the antibacterial activity of eucalyptuscajuput leaf waste belongs to the category of weak to strong.

Keywords
Cajuput leaf waste, antibacterial, pathogenic, inhibition zone

Topic
Biology

Link: https://ifory.id/abstract/Gkrg2MheVYN3

Corresponding Author
Anak Agung Gede Indraningrat

Institutions
a. Faculty of Medicine and Health Science, University of Warmadewa,Jln Terompong 24,Denpasar-Bali, Indonesia 80235.
* anak.indraningrat[at]gmail.com

b. General Hospital Sanjiwani, Gianyar-Bali, Indonesia

Abstract
Antibiotic resistance is currently an emerging global threat that is triggered by misused and overused of antibiotics, which led to higher mortality and morbidity rate. Information of antibiotic resistance iscrucial to determine the ideal treatment for patients. Since these data is rather scarce in Bali, we performed antibiotic susceptibility profile of different clinical bacterial isolates in the General Hospital Sanjiwani Gianyar Bali based on retrospective data in 2018. The data included type of tested antibiotics, name of clinical bacterial isolates, sex of patient and antibiotic resistance profile. Among 65 clinical bacterial isolates, high diversity of bacterial pathogen was found and grouped into 22 species, which Escherichia coli, Klebsiela pneumoniae and Staphylococcus aureus were the three predominant isolates identified. Exposure against 28 different antibiotics showed majority of bacterial isolates were resistant against baxtrim, aztreonam, ciprofloxacin, but susceptibility towards meropenem, amikacin and cefoperazone-sulbactam were observed. Routine surveillance to determine antibiotic resistance profile are of important and recommended to generate a local antibiogram as guideline to overcome pathogenic infections.

Keywords
Antibiotic resistance, susceptibility, clinical bacteria

Topic
Biology

Link: https://ifory.id/abstract/uRXfDJFP8KkH

Corresponding Author
Doni Anshar Nuari

Institutions
a)Departement of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut, Indonesia
* doni[at]uniga.ac.id
b) School of Pharmacy, Institut Teknologi Bandung, Bandung 40132, Indonesia

Abstract
Hyperlipidemia is a heterogeneous disorder that is usually characterized by increased levels of total cholesterol, low-density lipoprotein (LDL), very low-density lipoprotein (VLDL), triglycerides, and decreased levels of high-density lipoprotein (HDL) associated with an increased risk of coronary heart disease. Eleutherine palmifolia Merr. was used to treat hyperlipidemia so that this study was conducted to determine the antihyperlipidemic activity of ethanol extract of Eleutherine palmifolia Merr. Tests were carried out by exogenous and endogenous induction of Wistar strain white rats using high-fat foods and propylthiouracil. The parameters seen were total cholesterol, triglycerides, HDL-cholesterol and LDL-cholesterol. The results of research are at a dose of 100 mg/kgBW gave the best effect by reducing total cholesterol, LDL-cholesterol and triglyceride levels significantly different from positive controls (p <0.05). So that from the ethanol extract of Eleutherine palmifolia Merr. Has an antihyperlipidemic effect.

Keywords
Antihyperlipidemia, Cholesterol, Eleutherine palmifolia Merr, Triglycerides

Topic
Pharmacology

Link: https://ifory.id/abstract/hryfCBGET2AQ

Corresponding Author
Deden Winda Suwandi

Institutions
a) Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut, Indonesia
*deden[at]uniga.ac.id
b) Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Sumedang, Indonesia

Abstract
Azadirachta indica, A., Juss is a medicinal plant that is used traditionally for some disease, especially its leaves are used to treat a rheumatic diseases and lower blood uric acid levels. This study has been carried out to examine antihyperuricemia activity of ethanol extract, water fraction, ethyl acetat fraction and n-hexane fraction of the A. Indica leaves in male mice of Swiss-Webster strain. Extract and fraction doses used were 125, 250, and 500 mg/kg bw. The tests were conducted on mice suffering from hyperuricemia induced by potassium oxonat intraperitoneally and chicken liver juice orally. Measurement of blood uric acid levels were performed every hour for 4 hours after being given test preparations. The results showed that the ethanol extract and the fractions lowered blood uric acid levels. The n-hexane fractions at the three doses showed the highest activity. Then, the most active fraction, n-hexane fraction, was tested for its inhibitory activity on xanthine oxidase enzyme to determine its mechanism of action. The results showed that the n-hexane fraction inhibited uric acid biosynthesis by inhibiting the activity of xanthine oxidase enzyme with the IC50 value of 132 microgram/mL.

Keywords
A. indica leaves, Antihyperuricemia, Potassium oxonat, Xanthine oxidase

Topic
Pharmacology

Link: https://ifory.id/abstract/hLxW2BprPJZe

Corresponding Author
Dalia Sukmawati

Institutions
1) Biology Department, 9th Floor Hasyim Ashari Building, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jakarta, Indonesia.

2) Universitas Negeri Jakarta Culture Collection (UNJCC), 9th Floor Hasyim Ashari Building, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jakarta, Indonesia.

3) Universitas Muhammadiyah Prof. DR. HAMKA, Klender.

Abstract
Aspergillus sp. mold is found in various habitats, especially on the ground. Land waste disposal is a good medium for the growth of microorganisms due to the condition of the land that is rich in organic matter. This study is expected to provide information about the potential of Aspergillus sp. mold mainly from soil which can produce antimicrobial compounds. This study aims to determine whether the metabolic metabolites of Aspergillus sp. obtained have activities as antimicrobials against Staphylococcus aureus, Salmonella thyphosa and Candida albicans. The fermentation was carried out with a static fermentation method which was incubated for 5 days and the antimicrobial activity test was carried out by the diffusion method to use cylinders with 3 replications. The results of macroscopic and microscopic isolation and identification obtained five isolates from genera of Aspergillus sp. which were coded N1, N2, N3, N4 and N5. The metabolites were obtained from the fermentation of each fungus isolate Aspergillus sp. The test results of the metabolite activity of fungus Aspergillus sp. had antibacterial activity, against Staphylococcus aureus, Salmonella thyphosa and Candida albicans.

Keywords
Antimicrobial, Aspergillus sp., Static Fermentation.

Topic
Biology

Link: https://ifory.id/abstract/wHxyugzpNvEM

Corresponding Author
Atun Qowiyyah

Institutions
Department of Pharmacy,Faculty of Mathematic and Natural Science, UniversitasGarut

Abstract
Syzygium samarangense (Blume) Merr. & Perry was the lipase inhibitor that capable of inhibiting lipid absorption, so it assumes have a potency to be antiobesity agent. The aim of this study was to investigated the antiobesity effect of ethanol extract and various fractions of jambu air samarang leaves. The ethanol extracts were prepared by maceration method while fractination process was carried out using liquid-liquid extraction method. This study was conducted on Wistar female rats induced by high carbohydrate food for 45 days and MSG (Monosodium Glutamate) subcutaneous injection 2 g/kg body weight for 5 consecutive days followed by 14 days treatment. Induction with high carbohydrate food was continue during the treatment. Results showed that MSG and high carbohydrate food could induce obesity. The ethanol extract at a dose of 50 mg/kg bw; n-hexane and ethyl acetate fraction have antiobesity effect by inhibit body weight gain significantly different to positive control group (p <0.05). The biggest activity was shown by the n-hexane fraction. The ethanol extract; n-hexane and ethyl acetate fraction of jambu air samarang leaves did not have laxative and anorexic effect, also could not decrease fat deposition in liver organ and abdominal fat tissue

Keywords
Jambu air samarang, obesity, ethanol extract, n-hexane fraction

Topic
Pharmacology

Link: https://ifory.id/abstract/Ey9TGKAuaFq6

Corresponding Author
Farid Perdana

Institutions
1. Program Studi Farmasi, Fakultas Matematika dan Ilmu Pengetahuan Alam Univesitas Garut Jl. Jati No. 42 B Tarogong Garut, Jawa Barat
*farid[at]uniga.ac.id

Abstract
Kupa plant is one of the endemic plants of Indonesia which is included in the tribe of guava (Myrtaceae). This study aims to determine the antioxidant activity of ethanol extract of kupa leaves (Syzygium polycephalum (Miq.) Merr & L. M. Perry), and to determine the class of metabolites available in simplicia and ethanol extract of kupa leaves. Extraction of kupa leaf simplicia was carried out by maceration method using ethanol 96%. The antioxidant activity test was carried out qualitatively and quantitatively. The qualitative antioxidant test was carried out by Thin Layer Chromatography using the developer chloroform: methanol: acidic format (8:2:1) and using a sitroborate and DPPH 0.2% spotting appearance. Quantitative testing of antioxidant ethanol extract of Kupa leaves was carried out using the DPPH method with vitamin C as a comparison. The TLC test results obtained a greenish color on the sitroborat and yellow on the DPPH with an rf value of 0.381. In the antioxidant test the kupa leaf ethanol extract obtained an IC50 value of 10,327 ppm which is a very strong antioxidant. And secondary metabolites found in simplicia and ethanol extract of kupa leaves are flavonoids, saponins, steroids / triterpenoids, quinones and phenols.

Keywords
Antioxidants, kupa leaves, ethanol extract, DPPH.

Topic
Biology

Link: https://ifory.id/abstract/BKJyqPnMC7DE

Corresponding Author
Faizah Min Fadhlillah

Institutions
Garut University

Abstract
Antioxidants are compounds that are able to eliminate, cleanse, and resist radical effects. Antioxidants can stabilize free radicals by complementing the lack of electrons possessed by free radicals. Several studies have shown that citrus leaves of other spesies have been shown to have antioxidant activity. This study aims to determine the antioxidant activity of ethanol extract, n-hexane fraction, ethyl acetate fraction and water fraction of garut orange leaves (Citrus reticulata Blanco) using DPPH (2,2-Diphenyl-1-Picrylhydrazyl) method. Garut orange leaves were extracted with ethanol 96% by macerator apparatus. Concentrated extracts were fractionated by liquid liquid extraction method with n-hexane, ethyl acetate and water solvent. Furthermore, the ethanolic extract, n-hexane fraction, ethyl acetate fraction and water fraction of garut orange leaves were tested for antioxidant activity using the DPPH (2,2-Diphenyl-1-Picrylhydrazyl) method. The antioxidant activity test results showed that ethanolic extract of garut orange leaves had better antioxidant activity, followed by n-hexane fraction, ethyl acetate fraction and water fraction.

Keywords
garut orange leaves, antioxidant activity, DPPH

Topic
Biology

Link: https://ifory.id/abstract/Qew3VhRzpE8d

Corresponding Author
Aika Latifah Alawiyah

Institutions
a). Program Studi Kimia, Fakultas MIPA, Universitas Garut
Jl. Jati 42B, Tarogong Garut, Indonesia 55141
*aikalatifah[at]uniga.co.id
b). Program Studi Farmasi, Fakultas MIPA, Universitas Garut
Jl. Jati 42B, Tarogong Garut, Indonesia 55141
c). Program Studi Kimia, Fakultas MIPA, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudi No. 229, Bandung, Indonesia 40153

Abstract
Secondary metabolites of Syzygium aromaticum (L.) leaves essensial oil have been identified as antioxidants. This study aimed to determine the volatile compounds of Syzygium aromaticum (L.) leaves essential oil and antioxidant activity. Fresh Syzygium aromaticum (L.) leaves were extracted by steam distillation. Identification of volatile compounds was done by Gas Chromatography Mass Spectroscopy (GC-MS). DPPH assay was used to evaluated an antioxidant activity of samples. Volatile compounds of Syzygium aromaticum (L.) leaves essential oil resulted 15 compounds. The resulted of DPPH assay showed very strong antioxidant.

Keywords
Antioxidants, Clove, Essential oil,

Topic
Chemistry

Link: https://ifory.id/abstract/rZeaT7UEP8t9

Corresponding Author
Ria Mariani

Institutions
Department of Pharmacy, Garut University, Jati 42B, Garut 44151, Indonesia

Abstract
Ipomoea aquatica is Convulvulaceae plant that is widely consumed in Southeast Asia as a vegetable. The plant contain various bioactive constituents, e.g. phenols and flavonoids. Water spinach and land spinach are two varieties of Ipomoea aquatica in Indoneaia. Both plants have been analyzed for their radical scavenging activity using DPPH (2,2-diphenyl-1-picrylhidrazil). Total phenol was measured using Folin Ciocalteau and total flavonoid was measured using AlCl3. Water spinach has higher antioxidant activity than land spinach and there were correlation between antioxidant activity and total phenol/flavonoid content.

Keywords
Antioxidant, Ipomoea aquatica, phenol, flavonoid

Topic
Pharmacology

Link: https://ifory.id/abstract/VTn672jYmAdf

Corresponding Author
Isfi Zahara

Institutions
Department of Biology, Faculty of Mathematics and Natural Sciences
Universitas Negeri Jakarta, Indonesia

Abstract
Simpor (Dillenia sp.) is a plant of the Dilleniaceae family. Simpor (Dillenia sp.) has bioactive compound which is flavonoids that act as antioxidant. The purpose of this study was to measure the antioxidant capacity of the 96% etahnolic simpor leaf extract. CRD (Complete Randomized Design) was applied with 3x5 factors. Extraction of leaf samples done by maceration methode using ethanol 96% with variations in maceration time 24 and 48 hours and series consentration of (10%, 15%, and 20%). The antioxidant capacity assay of simpor leaf series concentration (10, 50, 100, 150, dan 200) ppm using the immersion method of the DPPH (1,1-Diphenyl-2picryl Hidrazil) measure absorption at a wavelength ot 517 nm and compared with the powder of ascorbic acid. The result showed that the ethanol extract has flavonoid qualitatively and quantitatively. Furthermore it also has radical scavenging ability against DPPH (1,1-Diphenyl-2picryl Hidrazil).

Keywords
antioxidant capacity, DPPH, leaves simpor, (Dillenia sp.)

Topic
Biology

Link: https://ifory.id/abstract/J6xKBPmrWg4w

Corresponding Author
Asmiyenti Djaliasrin Djalil

Institutions
Faculty of Pharmacy, Universitas Muhammadiyah Purwokerto
Jl. Raya Dukuhwaluh, PO. Box 202 Purwokerto 53182, Indonesia *asmiyentidjaliasrindjalil[at]ump.ac.id

Abstract
Exposure the ultraviolet (UV) radiation results in a photo-oxidative reaction that reduces the antioxidant defense system and increases the formation of reactive oxygen species (ROS) on the skin. Antioxidant creams protect the skin from adverse effects of UV which cause the initial signs of aging. Several creams containing 0.02 (F1); 0.2 (F2); and 2% of virgin olive oil (VOO) or virgin coconut oil (VCO) were prepared. Antioxidant activities of VOO, VCO, and their creams were evaluated by DPPH radical scavenging assay. The results showed that the oils and formulations have antioxidant activities. The IC50 value of VOO, F1, F2, and F3 of VOO were 31.7±0.1; 176.3±5.9; 111.9±4.7; 90.4±5.5 µg/mL, respectively. Furthermore, The IC50 value of VCO, F1, F2, and F3 of VCO were 44.7±2.0; 62.56±1.8; 53.56±1.7; 47.14±1.7 µg/mL, respectively. The formulation of antioxidant cream containing VOO meets the requirement of stability and physical properties. Meanwhile, the formulation of antioxidant cream containing VCO meets the requirement of stability and some physical properties, except for pH value.

Keywords
Antioxidant cream; Virgin olive oil; Virgin coconut oil

Topic
Chemistry

Link: https://ifory.id/abstract/MfdKtePCYpNg

Corresponding Author
Dewa Ayu Putri Sri Masyeni

Institutions
Sanjiwani Hospital/Faculty of Medicine and Health Sciences, University of Warmadewa

Abstract
Abstract Background: Substitution of long-term ART exposed to HIV/AIDS patients are common due to the ART adverse event. The study aim is to describe the reason of ART substitution among HIV/AIDS patient at Sanjiwani Hospital Bali. Methods: A retrospective study has conducted to the medical records of HIV/AIDS patients at Sanjiwani hospital Bali, during 2006-1018. Clinical data retrieved from the medical records and presented as descriptive data. Results: Over a twelve-year period, 1112 HIV/AIDS patients evaluated in the study. The ART regimen were Zidovudine-based ART, Tenofovir-based ART and Stavudine-based, for 12.2%, 87.3%, 0.5%, respectively. There were 2.2 % switching of ART during the study periode. The most reason was anemia (48%), followed by reducing of kidney function (28%), allergic reaction (16%), and 4% of nausea and suspected clinically failure to ART. Conclusion: We highlight that anemia is the main reason of ART substitution among HIV/AIDS patients

Keywords
ART; substitution; HIV/AIDS

Topic
Biology

Link: https://ifory.id/abstract/qh27jCe3TwWU

Corresponding Author
bayu hardiyono

Institutions
Universitas Bina Darma

Abstract
This research is a descriptive study which aims to determine the level of anxiety and confidence in south sumatra rock climbing athletes before the competition and during a the competition. The sample of this research amounting to 30 regional elite athletes. This research method is survey with a questionnaire as an instrument for data retrieval. The data analysis used descriptive analysis techniques with percentages. The results of the research that indicate, on intrinsic and extrinsic factors, for the results of anxiety analysis intrinsic factors in the low category of 21.94%, this means anxiety rock climbing athletes before facing matches are influenced by intrinsic factors. while for the results of the analysis of anxiety extrinsic factors in the high category 78.06%, this means that the anxiety of rock climbing athletes before facing the match is strongly influenced by extrinsic factors. While the results for the results of the analysis of confidence

Keywords
anxiety, confidence,rock climbing

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/bQP6evfuKLXR

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement, Faculty Of Earth Technology And Energy, Trisakti University, Jakarta

Abstract
Oil and gas industry is an industry with a high cost and high risk, artificial intelligence will help the work of humans to minimize the risk of accidents, reduce processing time and improve corporate profits. So the work becomes more efficient.The aims of the study give information that the artificial intelligence help the work to evaluate the initial gas in place on reservoir. Reservoir RGN has long produced, then it needs to be evaluated to find out how many initial gas in place is left in the reservoir. Additional research is needed to know the type of reservoir and drive mechanism.The method used is the research on reservoir RGN, the data used are based on real data in field.This research uses artificial intelligence MBAL and PVTP software, with the study of literature.Based on the research results obtained, this type of reservoir RGN is dry gas reservoir, with the drive mechanism is depletion drive. Initial gas reservoir RGN is 50,661.3 MMscf, with estimate ultimate recovery is 47,966.13 MMscf, recovery factor was 94.68% and the remaining reserve reservoir RGN in July 2018 is 10,850.386 MMscf or 10,85 Bscf.Artificial intelligence helps work, provides diverse outputs and the results obtained are more accurate and detailed

Keywords
original gas in place, artificial intelligence, PVTP, MBAL

Topic
Material Engineering

Link: https://ifory.id/abstract/TpaCUd7uEjFM

Corresponding Author
Selly Anastassia Amellia Kharis

Institutions
a) Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jalan Rawamangun Muka, Jakarta 13220, Indonesia
*sellyanas[at]yahoo.com

Abstract
Innovative learning in mathematics can be doing through an approach called ethnomathematics. Application of ethnomathematics is focus to relate the material being taught with student condition in real life and encourage student to make connections between their knowledge with their application in the daily life. This paper aim to describe the application of ethnomatematics in the learning of geometry at Junior High School level. This paper uses literature study and experiment. The shapes of ethnomathematics are various results from mathematical activites that people have and develop in their community, including the mathematical concept in cultural heritage in the form of temples and inscriptions, pottery and traditional equipment, batik motifs and borders, traditional games, a local unit, and some activities that already become a culture in society. Ethnomathematics can be applied for teaching mathematics in junior high school level because this enables students to relate learning mathematics in school with their activities in their daily life. Students can easily think about mathematics because they know the application and the benefit of learning mathematics, especially in geometry learning.

Keywords
Ethnomathematics; Geometry Learning; Batik

Topic
Mathematics

Link: https://ifory.id/abstract/Tw4qKDuf6rMb

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement , FTKE, Universitas Trisakti

Abstract
One type of light weight cement is foam cement which can be used in cementing operations in weak zones with the possibility of small fractures, and reducing the amount of light weight cement suspension levels. The foam cement suspension can be used to solve lost circulation due to natural vertical fractures or cavernous formations. The purpose of this study was to determine the potential of foam cement slurry to solve the loss circulation in geothermal wells Making slurry cement uses class G cement at 200 mesh and 100 mesh sizes with the composition of Cement. The cement is put into the waring blender containing water, stir it for 35 seconds, adding foam agent into cement slurry with variations in foam agent concentration of 0.03%, 0.06%, 0.09%, 0.12% and 0.15%. Observation of foam cement slurry above was carried out for 30 minutes to test the stability of bubbles in the mixture. The results this study showed different compressive strength values at variations of the concentration of foam agent. The strength value is strongly influenced by evaluation of permeability, porosity and bulk density of core foam cement. The test results of samples with 0.03% Sika-aer concentration have a compressive strength value of 3745,533 psia, while samples with Sika-aer concentration of 0.15% have compressive value of 1701.459 psia The value of compressive strength core foam cement samples can form a linear line relationship between variations in foam agent concentration.

Keywords
compressive strength, foam agent, lost circulation, sika aer, slurry cemen

Topic
Chemical Engineering

Link: https://ifory.id/abstract/Phc2VxZNryjF

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta

Abstract
Pattern X is one of the patterns in Field Z which is 60 km west of Prabumulih, South Sumatra, where the full scale waterflood is implemented. In general, the pattern used is an irregular inverted 5-spot where there are six production wells namely Z-091, Z-098, Z-110, Z-157, Z-195, and Z-233 and one injection well namely Z-227. Waterflood is a secondary recovery method by injecting water into the reservoir. Waterflood surveillance analysis was carried out to determine the conditions around the production and injection wells during waterflood. Surveillance analysis is used as a measure of the success in waterflood activities. One of methods that used is the Hall Plot method. It is obtained a slope which moves upward where displacement is moved normally or stable. However, over time there is an increase in the slope of the tilt where skin changes occur. In fact, the slope that occurs due to the installation of Multilayer Packer is used to adjust the desired injection rate. In the end, the injection results have no problems and runs stable. Based on the results of the Waterflood Surveillance Analysis Using the Hall Plot method, it can be concluded that the injection in the Z-227 injection well runs normally or stably

Keywords
Hall Plot, irregular inverted 5-spot, Surveillance, Waterflood

Topic
Material Engineering

Link: https://ifory.id/abstract/nQTx9AdUXDEb

Corresponding Author
Hilmi Aulawi

Institutions
Department of Industrial Engineering, Sekolah Tinggi Teknologi Garut, Jl. Mayor Syamsu No. 1, Garut, Indonesia
*hilmi_aulawi[at]sttgarut.ac.id

Abstract
This study aims to implement a decision-making approach in selecting electric generators in manufacturing companies. The first step is to compile a set of criteria that is matched with the companys preferences. The next step is to apply the Analytic Hierarchy Process (AHP) to determine the weight of the criteria using pairwise comparations. Furthermore, simple additive weighting (SAW) is used to select the best alternative using quantitative data. The study was conducted at a manufacturing company engaged in textile in Indonesia. The results showed that there were six criteria used to select electric generators, namely product prices, capacity, reliability, maintenance costs, ease of service and service life. The application of this approach has been able to help decision makers in the group decision-making process effectively and efficiently. Besides that, the results of this study have been able to utilize qualitative and quantitative data to produce the best solution in the selection of alternatives.

Keywords
multi-criteria decision-making (MCDM); AHP; SAW

Topic
Industry Engineering

Link: https://ifory.id/abstract/etb4gUdMpzBv