Pyrazolin is a dihydropyrazole derivative which is an azole group compound with a 5-heterocyclic structure containing 2 nitrogen. Pyrazoline is known to have several bioactivities and antidiabetic is an activity that is provided by pyrazoline. Pyrazoline (E)-7-(3-bromobenzyliden) -3- (3-bromophenyl) -3,3a,4,5,6,7- hexahydro-2H-pyrazolo [4,3-c]pyridine-2- Carbotioamides are synthesized from …
Composite is a material that is formed from two or more combination materials with the result that it is resulted a composite material. Hydroxyapatite is one that can be composited with chitosan as adsorbent dyes methylene blue and methyl orange. The purpose of this study was to synthesize hydroxyapatite from lokan shells (Geloina coaxans) using the microwave method with NaH2PO4 and Ca(OH)…
Pyrazoline and pyrazole are heterocyclic compounds containing two nitrogen atoms which have various bioactivities such as antidiabetic, anticancer, antibacterial, and tyrosinase inhibitors. Pyrazoline compounds and pyrazole derivatives of 2-methoxyphenyl and 3- hydroxybenzaldehyde were synthesized in three steps. The firststage is the formation of chalcone compounds using a microwave devic…
Mahogany (Swietenia macrophyla K.) is a type of multipurpose plant that can be used as a road shade tree. One part of the mahogany plant that has the potential to become waste somewhere is the skin of the fruit. Mahogany rind waste can be used as activated charcoal material based on its high cellulose content as a carbon source. The method used is carbonization at a temperature of 400oC for…
Hyperpigmentation is a skin pigment intrusion caused by an overproduction of melanin and unequal distribution of melanin, induce the darkening of the skin and emerge the black spots in certain areas of the skin. One of the way to prevent hyperpigmentation is to inhibit the production of melanin by inhibiting the tyrosinase activity. Tyrosinase activity inhibition is conducted by using an i…
Indonesian Government regulation No.5 in 2006, consumption of fossil fuel will be reduced from 52% (2015) to 20% (2025). The Government expects alternative energy can replace the fossil fuel. Galvanic cell is one of the alternative energy sources that can be developed to reduce dependence on fuel. Gavani cell can convert a chemical reaction into an electrical energy. In this research, power gen…
Crisis Fuel, which swept the world as a result of the high demand for oil and depleting oil reserves, this is the case also in Indonesia. Portable Power Plant Unit is one alternative that is very useful to generate energy for the people of Indonesia. The purpose of this research was to generate electrical energy using variations of the amount of AZ91 Magnesium plate on the performance of portab…
Durian (Durio zibethinus Murr) is one of plantation crops which has long been known by the public and used generally fruit only. Many people consume durian so produce waste in the form of durian seed and durian skin. This research aims to utilize waste durian seeds into starch and analyzed nutritional and organoleptic. In this study, the first process is drying durian seeds to dry. Further stri…
Soap is made with a cleaning chemical reaction between sodium or potassium bases with fatty acids from vegetable oils or animal fats. The main component of soap-making consist of a chain fatty acid C12 – C18 and sodium salts. Transparent soap is soap that has the highest level of transparency, emits light the spreads in the form of small particles, so that objects which are outside the soap w…
Stove gasification technology is the use of biomass as a fuel to convert it into a combustible gas which is subsequently converted into heat energy. Gasification is a technology-intensive conversion process materials into combustible gas. This study aimed to compare the rate of traditional fuel burning stove with stove gasification and analysis of the economic costs in the small industry. The r…
Corrosion is a metal reduction due to a chemical reaction of a metal with its environment. One way to reduce the rate of corrosion is by the addition of the inhibitor. The mangosteen rind contains tannins that can be used as an inhibitor. This research aims to know the value of the rate of metal corrosion inhibitor skin extracts using mangosteen. Sokletasi is used to extract tannin from the bar…
The high level of organic contaminants and total solid contained in Palm Oil Mill Effluent (POME) were reflected in its high values of COD, TSS and TDS, requiring a proper treatment prior to discharge into an environment. The adsorption-degradation processes were used to treat POME using bentonite as the adsorbent and MnO2/bentonite composite as the heterogenous Fenton catalyst. According …
This research is motivated by the condition of several SMA/MA in Kampar Regency so far the learning process is still using teaching materials in the form of printed books that must be used by students and most teachers have not made their own teaching materials to be used in the learning process. In teaching materials, the representation of phenomena used is only macroscopic and symbolic. Meanw…
Heterogeneous CaO catalysts as a role in biodiesel synthesis were developed continuously. The attempt to develop heterogeneous CaO catalysts was synthesizing heterogeneous CaO catalysts sourced from blood shells (CKD). The study aimed to synthesize heterogeneous CaO catalysts from KOH-activated CKD through the gel sol method. Catalyst synthesis also used ethylene glycol (C2H6O2) which serv…
Manganese oxide cryptomelane-type Octahedral Molecular Sieve (OMS) was synthesized by the reaction between KMnO4 and C6H8O7 (citric acid) with a mole ratio of 5:1 using precipitation method. The effect of citric acid flow rates (1, 2, and 3 mL/minutes) on the synthesis of MnO2 was studied and correlated with its catalytic activities. The as-synthesized manganese oxides were then characteri…
ABSTRACT The increase in ownership of motorized vehicles has resulted in increased transportation activities. The tendency to increase the number of motorized vehicles operating will increase the traffic load, one example of which is the increase in noise intensity. This study aims to measure noise intensity and map noise at peak hours due to transportation activities that occur at the Tab…
ABSTRACT Indonesia is a country rich in resources that have the potential to produce raw materials for fufural production, one of which is empty fruit bunches with a pentosan content of 25.90%. The number of empty bunches of waste throughout Indonesia in 2004 had reached 18.2 million tons. . The main design tool is an evaporator (EV-101) which functions to concentrate furfural up to 98% pu…
ABSTRACT Benzene, toluene and xylene (BTX) are petrochemical products made from naphtha through a catalytic formation process. Benzene and toluene are some of the products that are widely used in chemical raw materials. One of them is toluene, Toluene is used as a solvent and intermediate in the manufacture of chemicals, high octane components and gasoline, while the need for p-xylene is …
ABSTRACT Papaya leaves (Carica papaya L) have long been used by Indonesians for food and medicine. Papaya leaves have been reported to have several benefits, namely anti-tumor, dengue fever, and have antioxidant properties. The antioxidants in papaya leaves can be obtained from the flavonoids compounds contained in the leaves. This study aims to determine the levels of flavonoids extracted…
E-LKPD based on guided inquiry is a student activity guide to facilitate students in implementing learning activities in electronic form that can be seen on laptops, notebooks and smartphones that contain the syntax of guided inquiry. E-LKPD based on guided inquiry was created using the liveworksheets platform which is a free virtual platform that can convert LKPD into E-LKPD with automatic…