Jurnal ILMU DASAR
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Effect of Drought Stress on Morphology and Chlorophyll Content of Sorghum (Sorghum bicolor L. Moench)
Full text linkSorghum is a type of cereal plant that easily adapts to stressful environmental conditions. Sorghum has many benefits as it can be used as food, feed, and energy sources, making it a promising crop for development on dry land in Indonesia. Drought impacts plants during their growth process, causing physiological and biological changes. This study aims to determine the effect of drought stress on the morphology and chlorophyll content of sorghum plants. Preliminary research was conducted by planting three varieties of sorghum (Numbu, Super 1, and Super 2). Subsequent planting involved selecting the variety most resistant to drought based on data analysis of several parameters. The basic design used in this experiment was a completely randomized design (CRD) with one factor: the level of drought stress, which had four levels -no drought stress as a day 0 (control) and drought stress for 3, 6 and 9 days by withholding water. The results showed a decrease in the total chlorophyll content of the leaves over time. Drought stress for 6 and 9 days without watering resulted in water content dropping below 25%, indicating severe drought stress and disrupting plant growth. Severe drought stress was characterized by low soil and leaf water content, yellowing and curling of the leaves
Application of Optimal Control on Mathematical Model of Drug Distribution with Education and Criminal Law Aspect
Full text linkDrugs are substances that, when used, can impact the body, particularly the central nervous system/brain. Prolonged drug use can lead to various disorders affecting physical, psychological, and social functioning. Generally, drug use cases occur among teenagers due to a lack of education and low literacy levels about the dangers of drug. In this study, control efforts by modeling the problem of drug use will be studied. In this study, modeling the problem of drug users with control efforts will be studied. There were additional controls for preventing drug abuse through school education, contact prevention through security and healthy living campaigns, and the procedures to report all drug abuse activities. The Pontryagin Minimum Principle is used to shows that the optimal controls influence the level of drug user distribution
Navigation System of Electric Car with Faster R-CNN for Pediatric Patient Transportation
Full text linkThe use of electric cars as a means of transportation for pediatric patients has the main purpose of having a positive effect on the psychology of pediatric patients before surgery. Therefore, it is expected to accelerate the healing process. An electric car navigation system that can recognize the environment is needed. This article aims to develop a camera-based semi-autonomous navigation system using the faster R-CNN method to detect markers as electric car direction. This method optimizes the range of interest (RoI) layer to produce optimal features. Faster R-CNN is faster in generating accurate region proposals compared to R-CNN and Fast R-CNN. Various Faster R-CNN models were tested in image data processing for marker detection as the electric car steering system. Test results on FPS variations show that the best results were obtained when using the Faster R-CNN MobileNet V3 Large 320 FPN model with a value of 11.3f ps for the forward marker, 18.9 fps for the stop marker, 22.6 fps for the left turn marker and 11.1 fps for the right turn marker. With this model, the results obtained are quite good in testing the performance of the car navigation system. The results obtained in the success of the test are 70% for the forward marker test, 100% for the stop marker test, 90% for the left turn marker and 100% for the right turn marker
Design Smart Installation Household Electricity Using Solar Panels 600 Watts on Grid Capacity
Full text linkEnergy security plays an important role, especially in the modern and digital era which continues to increase in use. The availability of renewable energy sources is very abundant in tropical countries of Indonesia, especially solar energy sources that can be used to meet electricity needs on a household scale without worrying about limitations and pollution. This study aims to design electrical installations using solar panels with an autonomous drive system following Arduino uno-based sunlight with a capacity of 600 watts on-grid to reduce the cost burden of PLN and reduce air pollution. The addition of Arduino uno autonomous devices plays a role in increasing the efficiency of solar radiation received thereby increasing the output power of the installation. The result of this study is the design of a power plant installation with a solar cell with a capacity of 600 watts with 13 50-watt monocrystalline PV solar modules with supporting components, such as a 1000-watt inverter, and an efficiency device in the form of an Arduino uno-based autonomous drive system. This research produces data on the benefits obtained by using this tool amounting to Rp. 12.500 / month for 20 years of efficiency in using solar panels
The Bioinsecticide of The Essential Oil of Citronella (Cymbopogon citratus) Against Black Ants (Crematogaster sp)
Full text linkThe essential oil of Cymbopogon citratus has the potential as a natural bioinsecticide in safe pest control. This research aimed to determine the chemical content and activity of the essential oil of C. citratus from Punggur village, Kubu Raya district, in killing black ants. This research was conducted in two stages: (i) Distillation of citronella oil and its characterization by IR and GC-MS, and (ii) bioinsecticide test of the oil on black ants (Crematogaster sp). The distillation results gave a yield of 0.43%, which contained 47 compounds with 7 main compounds namely beta.-Myrcene (9.98%), iso-geranial (7.25%), linalool (2.04%), geranyl acetate (2 .39%), geranic acid(1.07%), citral (Z)-(14.97%), and citral (E)-(4.71%). Characterization with IR showed that there were absorption wavelengths of 3500 cm-1 (C-OH), 3086 cm-1 (C-H alkenes), 2920 cm-1 (C H alkanes), 2856 cm-1 and 2748 cm-1 (C-H aldehyde), 1716 cm-1 and 1674 cm-1 (C=O). The anti-ant activity test using various concentrations gave an LCM100 value of 1% and an LC50 of 0.016%. From the results of the study, it can be concluded that the essential oil of citronella leaves is a bioinsecticide against Crematogaster sp
Utilization of Tofu Liquid Waste with Ceramic-Based Microbial Fuel Cell (MFC) Technology
Full text linkThe application of ceramic-based Microbial Fuel Cells (MFCs) for the treatment of tofu liquid waste presents a promising and environmentally sustainable approach. The purpose of this study was to determine the effect of adding variations in substrate concentration and to determine the effect of variations in the surface area of the electrode (anode and cathode), resulting in a maximum power density value for a period of 13 days of measurement. The initial step is measuring the voltage and current with the substrate concentration without a dilution process, then the concentration variations are carried out by dilution 10 times, 8 times, 5 times, 4 times, and 2 times on ceramics with a diameter of 8 cm. The second step is measuring the voltage and current by varying the surface area of the electrodes (cathode and anode). The results of the measurements obtained that the maximum power density value obtained was 188.23 mW/m2 without a dilution process, namely with a concentration of 3640 ppm for the third day. Meanwhile, the results of the measurement of the variation of the electrode surface area obtained a maximum power density value of 205.88 mW/m2 on the electrode surface area of 3.57 m2 for the third day. The more surface area of the electrode given at the time of measurement, the more bacteria contact the electrode, causing the resulting power density value to be even greater
In Silico Analysis of Active Compounds from Allium tuberosum as Drug Candidate for Inhibitor DENV-3 Envelope Protein
Full text linkDengue fever has become a global health issue, the development of dengue vaccine has not yet been established. Medicinal plants are an ideal alternative for DENV infection drugs. The purpose of this study was to determine in silico the potential of active compounds from Allium tuberosum as envelope protein inhibitors of DENV-3. The method of this research is to do docking analysis of compounds with DENV-3 envelope protein and analysis of amino acid residues using MVD, pharmacokinetic analysis using SwissADME, toxicity analysis using ProTox-II. The best docking value for the potential activity to inhibit the receptor DENV-3 is the thymidine compound (RS: -81.1245 kcal/mol). The highest activity of thymidine is the most promising as a drug candidate, as evidenced by the toxicity analysis which is predicted to have non-carcinogenic, non-mutagenic, inactive properties against hepatotoxicity, cytotoxicity and immunotoxicity parameters, as well as pharmacokinetic analysis that fulfills 6 parameters of lipopolicity, molecular weight, polarity. , insolubility, insaturation, and flexibility which indicate the drug candidate of thymidine is safe for its bioavailability. The conclusion from the results of this study is that one compound has the ability as an antiviral, binding score with DENV-3 is good, and is safe in terms of pharmacokinetics and toxicity, namely thymidine compound
Filtered and Unfiltered Cigarette Effect on White Rats Male Reproduction (Rattus norvegicus L.)
Full text linkCigarette smoke can cause various health problems, one of which is a decrease in fertility in males. The purpose of this study was to determine the effect of smoke exposure between with and without filter hand-rolled kretek cigarettes (SKT) and white cigarettes on white rats male reproduction: sperm quality in the form of sperm motility and viability, also the structure of seminiferous tubules. This study used 5 treatment groups (KP), namely controls not given exposure to cigarette smoke (KP0), exposure to unfiltered kretek cigarette smoke (KP1), exposure to filtered kretek cigarettes (KP2), exposure to unfiltered white cigarette smoke (KP3) and exposure to secondhand smoke. filtered white cigarettes (KP4) with treatment placement arrangement in a Completely Randomized Design (CRD) and if there is a significant difference, a Duncan Multiple Range Test (DMRT) is carried out. The results obtained on sperm quality, namely sperm motility and viability, decreased. Good quality at KP0 then the quality decreases successively starting from KP1, KP2, KP3 and KP4. The results on histpathological observations of the seminiferous tubules, there were no pathological changes found in all treatments. In contrast to the histopathology of seminiferous tubules, the number of spermatogenic cells showed a significant difference between treatments with the least average spermatogenic count and a decrease in the number of cells from spermatogonia cells to spermatid cells, namely in the treatment group exposure to filtered white cigarette smoke (KP4). Overall, the exposure that caused the most severe impact on all measured parameters was in the treatment group of filtered white cigarette smoke (KP4)
Antibacterial Activity of Plumeria alba L. Leaf Ethanol Extract Against Propionibacterium acnes
Full text linkThe Plumeria alba L. leaves are empirical as an alternative to treatment as an antibacterial to Propionibacterium acnes, Staphylococcus aureus and Salmonella typhi, as aromatherapy for the repellant and the denture cleanser of the growth of the Candida albicans in the synthetic nylon base. It has been known to contain alkaloids, flavonoids, saponin, tannin, and fenol that have activity as antibacterial. The study aims to determine the antibacterial activity and to identify the best concentration of 70% ethanol extract of P. alba L. leaf to P. acnes. The method used in extraction is a maceration with 70% ethanol solvent which is concentrated using a rotary evaporator. Extract of ethanol 70% of P. alba L. leaves was used to determine antibacterial activity by determining the Minimum Inhibitory Concentration (MIC) using solid dilution and the width of inhibition area by diffusion method of paper discs at concentrations of 30%, 40%, and 50%. Phytochemical tests were carried out of alkaloid, flavonoid, saponin, tannin and fenol qualitatively. The result showed that ethanol 70% extract of P. alba L. leaf had antibacterial activity against P. acnes with MIC at 25% concentration. The best antibacterial activity from ethanol extract 70% of P. alba L. leaves at a concentration of 50% with inhibitory, namely 9.4 mm. The P. alba L. leaves phytochemical test contains alkaloids, flavonoids, saponins, tannins, and fenol. The conclusion ethanol extract 70% of P. alba L. leaves have the antibacterial activity against P. acnes