Analysis of predator-prey acarine models in trophic level is discussed in this final project. The system of differential equation of the predator-prey acarine model is used in each population. The model consists of three observed equilibrium points. The stability of the system around the equilibrium point is determined by the linearization method in order to obtain the characteristic equati…
ABSTRACT Liquid Natural Rubber (LNR) is a product of natural rubber latex depolymerization process whose molecular weight specifications are influenced by several factors. There are CoCl2 catalyst content and depolymerization reaction time. This study aims to synthesize Liquid Natural Rubber (LNR) and study about variations of CoCl2 catalyst levels and reaction time effect to the molecular wei…
Mapping the potential of underground water resources using geoelectric configuration method of Schlumberger in Rumbai Pesisir Subdistrict Pekanbaru City has been conducted. This study aims to map the potential of underground water resources based on the interpretation of measurement data using geoelectric resistivity method with Schlumberger electrode configuration. Measurements were made using…
Inflation is one of the monetary phenomena that can cause an economic crisis that affects the economy of a country as continuestly. Inflation is a situation in which there is a sharp price increasing continuely over a period of time. This study aims to analyze the effect of the Growth of money supply, BI Rate and the exchange rate toward the inflation in Indonesia. The type of data used in…
This study aims to analyze the influence of the money supply (M2), rupiah exchange rate against the US dollar, and BI rate on inflation in Indonesia in 1998 - 2018. The method used in this research is descriptive and quantitative methods. The analytical model used is multiple linear regression analysis with the Error Correction Model (ECM) technique (with software EViews 10), where the end re…
Chalcone conjugate is a conjugate from two bioactive molecules to find a new molecule as a solution from resistance problem to drug. Chalcone conjugate has various biological activities, such as antibacterial, antimicrobial, biofilm, antiviral, antimycobacterial, antioxidant, anticancer, and antitumor. Chalcone conjugate (E)-3-(4-((E)-((4-hydroxyphenyl)imino)methyl)phenyl)-1-(4-methoxyphenyl)pr…
This study aims to determine the effect of interest rates, money supply, and exchange rate against rupiah inflation in Indonesia in 2002-2017 This study analyzed the Indonesian data for the period 2002-2017, with the objective to qualify accurate coefficient estimates in order to produce accurate interpretations and conclusions. Data analysis used in this research is descriptive analysis and m…
This study aimed to analize the effect investment credit interest rate, Gross domestic product (GDP), and inflation to Domestic investmen in Indonesia. This study used quarterly time series data during the period 2007 to 2016. The menthod of analysis used in this research in quantitative descriptive, menthod partial and simultaneous analysis (Multiple linear regression analysis with the help o…
This research aims to determine how much influence inflation, interest rate on credit investment, and rupiah exchange rate on domestic direct investment (DDI) in Indonesia. This research uses independent variables of inflation, interest rate on credit investment, and rupiah exchange rate, and dependent variable is domestic direct investment (DDI) in Indonesia. The data used in this research is…
Chalcone is a compound that has two aromatic rings in its structure and connected by 3 carbon atoms which is an unsaturated α, β carbonyl system. Chalcone conjugated is the conjugation of two bioactive molecules as one of the strategies to obtain new bioactive compounds. Conjugated chalcone is known to have biological activities such as antiviral, anticancer and antioxidant properties. Chalco…
ABSTRACT The family is the smallest unit of a society. Nowadays, many families who do not have children are ignored by certain things that make the family can not have children or choose not to have children. Indeed, children in the family play a very important role in determining the continuity of a family relationship, where from several assumptions that children can minimize the occurrence …
Pyrazoline is five ring heterocyclic compounds with two adjacent nitrogen atoms which is known to have diverse biological activities such as antibacterial, antimalarial, antituberkular, anticancer and antioxidant. This study aims to synthesize derivatives of pyrazoline compounds to add variety and increase their bioactivity. Pyrazoline analogue (E)-7-(4-methoxybenzyliden)-3-(4-methoxyphenyl)-2-…
Sidempuan salak rind was one of the abundant amounts of waste in the South Tapanuli Regency. Sidempuan salak rinds contain many celluloses so that they can be used optimally as activated charcoal. PT. X is a gold mining company in Batang Toru District, South Tapanuli Regency, North Sumatra Province. Activated charcoal from the Sidempuan salak rinds is expected to be able to reduce the concentra…
Sapta Pesona is a condition that must be realized in every tourism product so that it can attract tourists to visit an area. One of the attractions that tourists visit is low so that it requires the application of Sapta Pesona in the Sakai tribe traditional house, Kesumbo Ampai Village, Bathin Solapan District, Bengkalis Regency. Therefore this study aims to determine the application of Sapta P…
Promotion is a way of communicating that is usually done in an organization whose purpose is to attract potential customers to buy products and services that are sold or offered. This study aims to determine the implementation of the promotion of Guruh Gemurai Waterfall Attraction by the Tourism and Culture Office of Kuantan Singingi Regency and analyze what are the inhibiting and supporting fa…
Hotel is a commercial business that open for public which offers service and has three public facilities which are accommodation, food and beverage service departement is one of the most important part in hotel operational because in many occasions at hotel usually there will be a time to serve food and beverage in between time. Often times while serving food and beverage the waitress who were …
ABSTRACT The utilization of ozone is commonly applied in various fields, for instance, it is used as a disinfectant for water treatment, disinfecting, sterilizing medical devices and preserving foodstuffs. Ozone is a nearly colorless gas with a characteristic odor that can be detected by humans up to 0.01 ppm. It can be produced by the dielectric barrier discharge method, which is generally us…
ABSTRACT The voltage dip is a disturbance that often occurs in electrical power systems that reduce power quality. In general the voltage dip appear from the use of electrical equipment and electrical machines that consume a lot of power, and will be effect the performance of electronic and sensitive equipments caused by voltage dip. Voltage dip measurement in a 20kV distribution transformer o…
The city of Batam is a city with a geographical location that is directly neighboring to Malaysia and Singapore, thus encouraging the Riau Islands provincial government to provide various facilities and infrastructure such as hospitality. A large number of hotels make hotel management compete with each other in providing good services to their customers. In this case the Travelodge Hotel takes …
ABSTRACT Ozone is used in various area including medicine, drinking water treatment and waste treatment. Ozone can be produced using dielectric barrier discharge which is supplied by high voltage. High voltage occurs in the dielectric barrier discharge air gap as a result of the failure of air in maintaining its insulator properties. Power supply used in this study is a parallel resonant push-…