Penicillium sp. LBKURCC34 has the ability to produce antibacterial activity by single and co-culture fermentation. To increase diversity of chemical compounds, in this study, Penicillium sp. LBKURCC34 was fermented by co-culture with the addition of Staphylococcus aureus on day 3rd for 14 days incubation. To obtain active fractions as antibacterial activity from the ethyl acetate extract ag…
Pyrazoline is a five-ring heterocyclic compound containing two nitrogen atoms close to each other and has various biological activities, one of which is antidiabetic. This study aims to synthesize pyrazoline and determine their activity as antidiabetic. Pyrazoline was synthesized from curcumin through a Claisen- Schmidt condensation reaction between 1-benzyl-4-piperidone and 4- chlorobenza…
Hyperpigmentation is a condition when melanin is produced in excess, causing dark patches to appear on the skin. Treatment of hyperpigmentation can be done through tyrosinase inhibition. Tyrosinase itself is a key enzyme in the process of melanin synthesis so that if this enzyme is inhibited, melanin production will be inhibited as well. One of the compounds that has activity as an inhibito…
The development of road infrastructure in Indonesia is very rapid to keep pace with the growth of vehicles. However, the structure of road pavements in Indonesia is not optimal and causes various problems due to overload and Indonesia's climate. For this reason, asphalt binders are needed that are hard, have high softening points, are elastic and have good adhesion to improve pavement performan…
The solid waste of pulp green liquor dregs comes from the recovery boiler which contains high sodium carbonate (Na₂CO3) and solid waste of pulp slaker grits is lime which does not react between green liquor (Na₂CO3) and calcium oxide, also known as lime (CaO), the main content is sand which containing hydroxide. The method used in this research is mixing. This research was conducted wit…
Zeolite is a hydrated porous alumina silicate mineral with a threedimensional framework structure that has many benefits. Zeolite can be synthesized with basic materials that contain a lot of silica and alumina, one of which is Maredan clay from Riau. Maredan clay has been synthesized into zeolite sodalite, but its crystallinity is still low < 50%. In this study, sodalite will be impregnat…
Tyrosinase is an enzyme that plays an important role in synthesis of melanin through a process called melagonesis. Excessive expression of melanin causes hyperpigmentation of human skin, including browning of fruits, thereby reducing its economic value. The aimsof this study are to screen for tyrosinase inhibitors by synthesizing halogen-substituted pyrazolo-pyridine derivatives. Furthermo…
Pyrazoline is a heterocyclic azo compound consisting of two nitrogen atoms and three carbon atoms. 2-pyrazoline compounds are the best known class for their various biological activities such as antiviral, antimicrobial, anticancer, anti-inflammatory and antioxidant. The aim of this study was to synthesize a substituted 2-pyrazoline compound at position 1,3,5 of the pyrazoline ring with a p…
The current textile waste treatment system uses physico-chemical method that requires further processing. For this reason, it is necessary to apply a bioremediation method using live cultures of T. asperellum LBKURCC1 because Trichoderma asperellum LBKURCC1 is a fungal strain isolated from the rhizosphere of cocoa in Riau, Indonesia, where mycelia from the fungus T. asperellum LBKURCC1 is …
ABSTRACT Peat water in Sumatra has a high concentration of Fe. One technology that can be applied to remove Fe concentration is aeration with a cascade aerator. Cascade aerator is an aeration system arranged like stairs that can add oxygen to the water, causing an oxidation reaction between oxygen and Fe which will then cause Fe(OH)3 deposition. This study aims to determine the ability of …
ABSTRACT Peat water is surface water that has a dark brown color caused by plant organic matter and high Fe metal so that it requires effective and efficient treatment so that it is suitable for use by the community. One alternative to reduce Fe metal and color in peat water is to use an adsorbent made from biocomposite Spent Bleaching Earth (SBE) and Spent Mushroom Substrate (SMS). The pu…
ABSTRACT The wastewater of tofu industry has a high content of organic materials, so it can cause environmental pollution. Based on the parameter test results of the wastewater of tofu industry studied, it is know that the content of COD (2644 mg/l) and BOD (698 mg/l) needs to be treatment before being discharged into the environment. An alternative to process the industrial wastewater is …
ABSTRACT Palm oil processing produces large amounts of liquid waste. Palm oil Mill Effluent (POME) contains high organic compounds such as COD, BOD and TSS values are so high that need processing necessary. a method that can be used is adsorption. In this study, the adsorbent used was Spent Mushroom Substrate (SMS)-Spent Bleaching Earth (SBE) biocomposite. SMS has potential as an adsorben…
peat water into clean water is using membrane technology. The membrane material is one of the most important factors that determine the performance of the membrane. This study uses a chitosan alginate composite membrane for peat water treatment located in Rimbo Panjang Village, Kampar. The chitosan used is derived from shrimp shell waste that has undergone a process of demineralization, de…
ABSTRACT Nata is a fermented food ingredient of Acetobacter xylinum bacteria which produces a gel sheet on the surface of the substrate in the form of cellulose. Acetobacter Xylinum can live in pineapple juice as a substrate and also in fruits that contain glucose and fiber. Pineapple is one of the leading commodities in the horticultural sub-sector with great potential in Indonesia. The p…
ABSTRACT Nata is a fermented food ingredient of Acetobacter xylinum bacteria which produces a gel sheet on the surface of the substrate in the form of cellulose. Acetobacter Xylinum can live in pineapple juice as a substrate and also in fruits that contain glucose and fiber. Pineapple is one of the leading commodities in the horticultural sub-sector with great potential in Indonesia. The p…
ABSTRACT The lead (Pb) is one heavy metal that is extremely harmful to human health and is a metal element that cannot be dissolved by natural processes. Adsorption is a technology for separating dissolved metal ions ini liquid waste which is easy to handle and very effective. One type of adsorben that has potential and is being developed is hydroxyapatite (Hap). The purpose of this study …
ABSTRACT Bleaching is an important process in pulp making in order to produce white pulp based on consumer criteria. D1 stage hold an important role in bleaching process as the final process to achieve desired brightness target. To achieve the target, there are some parameters need to be watched which are pH, temperature, and time in bleaching process. This observation had been held to stu…
ABSTRACT D0stage is important stage in bleasching process because first delignification happen in this stage, D0result will affect rest bleaching process also final pulp quality. In past several months there is increment on bleaching chemical consumprion in Fiberline#2, observation been held to study reason of bleaching chemical increment and the result we found there is some alteration on…
ABSTRACT Biomass Gasification converts biomass into gaseous fuels that can be used in conventional equipment such as boilers, engines and turbines or advanced equipment such as fuel cells for heat and electricity generation. Simulation of biomass gasification can be carried out with several approaches, one of which is a non-stoichiometric equilibrium model determined by minimizing Gibbs fr…