The redox titration of Fe (II) ions with K2Cr2O7 using a potentiometry method the effect of EDTA and SCN- ligands

Complexometric titration is often used for determining the metal content, either through direct titration or back titration. This study aimed to investigate redox titration between Mohr salt solutions and potassium dichromate in an acidic atmosphere in the pH range 2. The results showed that the reaction proceeded effectively at pH 2, with Mohr's salt solution acting as titrant. Furthermore, experiments were conducted to compare the effectiveness of EDTA ligands and SCN- ligands in improving the sharpness of the Fe2+/ Cr2O72- redox titration curve at pH 2. Results show that EDTA ligands are more effective than SCN- ligands in improving the sharpness of the titration curve. However, it should be noted that the addition of EDTA ligands can shift the equivalent point volume earlier, so adjustments need to be made in redox titration analysis. Research has also shown that adding excess moles of EDTA to total Fe (II) ions can decrease redox potential in Fe2+/ Cr2O72- systems. These results provide additional insight into the use of EDTA ligands in redox titration analysis and their relevance to redox potential changes in the systems studied

Gastroprotective activity of Banana peel (Musa paradisiaca var. sapientum) methanol extract purified on aspirin-induced gastric ulceration in Rats

Banana (Musa paradiasiaca var. sapientum) is the world's most popular fruit-bearing crop, with rising consumption and waste. This study aimed to measure the metabolite compound and evaluate the gastroprotective properties of a banana peel-purified methanol extract. Animals test used in this study were divided into six groups: Group One received NaCMC 0.5%, Group Two received sucralfate, Group Three received aspirin 1000 mg/kg body weight, and groups four, five, and six received PBP at doses of 200 mg/kg body weight, 400 mg/kg body weight, and 600 mg/kg body weight, respectively, for seven days. Except for group 1, all groups were induced with aspirin at 1000 mg/kg body weight on the eighth day. The result of this study exhibited banana peel containing total phenolic, flavonoid, and tannin compounds with concentrations of 33.45 mg GAE/g, 19.92 mg QE/g, and 0.16 %, respectively. The results showed that pure extract of Musa paradiasiaca var. sapientum fruit peel can reduce the incidence of gastric ulcers by decreasing the ulcer index (p<0.05).. The results suggested that Musa paradisiaca var. sapientum peel has a gastroprotective effect against aspirin-induced gastric ulceration

Interprofessional education applied in first-year and third-year health students: cross-sectional study

Health professions work together to provide the best service in health care facilities by collaborating with patients, families, worker and the community. Interprofessional education (IPE) were practice of collaboration between two or more students from different health profession programs. The purpose of study was to compare IPE results from first and third year batches. The two batches included 345 first-year students and 460 third-year students, from three different health disciplines, including medicine, pharmacy, and public health. These students met for four weeks to increase interprofessional collaboration, improve communication skills, foster respect and increase knowledge of the various roles each discipline, especially case management, conflict management and team work. Before IPE program, the students were given pre-questionnaire to assess their prior understanding of IPE. Each group of first-year students presented the outcomes of their discussions in the fourth week, while the third-year students created a poster about the subject and presented it in the second week. The students complete the program and post-questionnaire after their presentation. The International Collaborative Competencies Attainment Survey served the development the IPE questionnaire (ICCAS). The result of pre-IPE domains’ score revealed substantial disparities in the team work domain, with third-year students score was lower than the first students, whereas first-year students had the highest score in the most of IPE categories, unless collaboration and conflict management (p>0.05). The post-IPE domains’ score showed significant differences in all of the domains. Most of the IPE domains had higher score in first year students, excluding communication and team work

In silico study of Sambiloto (Andrographis paniculata) compounds from GC-MS and LC-MS/MS as alpha-glucosidase and DPP-4 enzyme inhibitor

Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia, impaired insulin secretion, and insulin action. To overcome this disease, some people treat it with natural ingredients. Sambiloto (Andrographis paniculata) is reported to have a wide range of pharmacological activities, one of which is anti-diabetic. Sambiloto showed activity in lowering blood glucose which has the potential as an antidiabetic. Computational methods, such as molecular docking, can increase the effectiveness and reduce the cost of searching for new active compounds. The purpose of this study was to determine the component compounds contained in the ethanol extract of Sambiloto and obtain the potential compounds to inhibit the alpha-glucosidase and DPP-4 enzymes as anti-diabetics with molecular docking method. Sambiloto leaves were macerated for 3 x 24 hours using ethanol 96% as a solvent and concentrated with an evaporator. Sambiloto extract was analyzed using LC-MS, and GC-MS. In-silico analysis includes geometry optimization and molecular docking methods. Preparation of the test ligands was carried out by the ChemBioDraw Ultra and ChemBio3D applications, then optimization by Gaussian 09 application. The crystal structures of the target proteins used were those with PDB ID 5NN8 for alpha-glucosidase and 2QOE for DPP-4. Molecular docking was performed using Autodock 4.2.3 application. From analysis with LC- MS/MS and GC-MS methods, 18 compounds were identified. Molecular docking was performed on the identified compounds. The results of molecular docking showed that the compound S17 (11-(P- Bromoanilino)-5H-Dibenzo [B,E] [1,4] Diazepine), S1 (andrographolide) and S2 (andrographanin) have the potential to inhibit the activity of alpha-glucosidase enzyme; on the other hand S17 (11-(P-Bromoanilino)-5H-Dibenzo [B,E][1,4]Diazepine) and S5 (andrographolactone) have the potential to inhibit the activity of DPP-4 enzyme. These compounds have the potential to inhibit alpha- glucosidase and DPP-4 enzymes which act as antidiabetics

Study of kinetic and adsorption isotherm of ibuprofen on mcm-41 synthesized with rice husk

Rice husk is one of the abundant wastes, especially in agricultural countries. Rice husk waste has asilica content of 95.80%, where the silica content can be utilized to make an adsorbent. One of theadsorbents that can be made is Mobil Composition of Matter 41 (MCM-41), a material with ahexagonal structure with a surface area to adsorb ibuprofen. Based on the results of the research thathas been done, MCM-41 synthesized with rice husk has the same characterization results as MCM-41synthesized with commercial materials tetraethyl orthosilicate (TEOS). Fourier Transform InfraredSpectroscopy (FTIR) characterization results show the absorption peak is at wave number 1068.58 cm1 which shows asymmetric Si-O-Si stretching vibrations and at 799.60 cm-1region is symmetric Si-OSi stretching vibrations. X-ray diffraction (XRD) characterization results show an hexagonal crystalform at 20 = 20o-30o. Scanning Electron Microscope (SEM) characterization results show particle of2,664 um. Based on the results of the research that has been done MCM-41 synthesized from rice huskcan adsorb ibuprofen with Langmuir isotherm approach and Pseudo Second Order kinetics, and themaximum adsorbing capacity is 34.48 mg/

Combination of polyherbal Phyllanthus reticulatus with Zingiber officinale and Cymbopogon citratus to optimize the antioxidant capacity

Currently, the public is interested in polyherbal-based foods and beverages as a source of natural antioxidants. The aim of the study is to evaluate the antioxidant properties and the phenolic and flavonoid compounds of formulations containing Z. officinale, C. citratus, and P. reticulatus (ZCP). Each sample was extracted using the maceration process in an ethanol solvent at room temperature for three 72-hour periods. There were fourteenth formulation of Z. officinale rhizome, C. citratus leaves, and P. reticulatus fruit which used Design of Expert (DoE). The DPPH method was used to determine the power of antioxidants. The flavonoid content of the extract was measured using the colorimetric method and AlCl3 reagent, while phenolics content using Folin-Ciocalteu. The formulations ZCP 1:0:0, 0:0:1, and 1:1:1 showed the antioxidant capacity in a strong categorization, with an IC50 value less than 50 µg/ml, while ZCP 0:1:0 was in a weak categorization (IC50 > 250 µg/ml). Another ZCP formulation was in a medium category. The ZCP 1:1:1 formulation was suggested as the best one for this investigation, which contains three plant samples. This formulation is interesting for further toxicity studies and in vivo testing so that it can be applied as an antioxidant-rich supplement product

The Optimation of Fermentation Time, Antibacterial Activity and Profiling Secondary Metabolite of Symbiont Fungi from Sponge Gelliodes fibulata

Symbiont fungi are organisms that live in sponges tissue. Sponges are known to contain many metabolites which have the potential to be used as raw materials for medicine. Sponge Gelliodes fibulata is belongs to category demospongiae. The purpose of this study was to determine the optimal time to obtain the best secondary metabolite profile results in the sponge symbiont fungus Gelliodes fibulata. This research is included in experimental research. Beginning with the fungi culture of the sponge Gelliodes fibulata. Followed by a fermentation process with variations in time 2, 4, 6, 8, 10, 12, and 14 days to get the secondary metabolites produced. A liquid extraction process is carried out to obtain secondary metabolites produced during fermentation. The final stage is to carry out qualitative analysis with TLC and antibacterial testing with the well-diffusion method. The results obtained show that the long fermentation time influences the secondary metabolites obtained, and the metabolites possessed influence their antibacterial activity. The profile of secondary metabolites from TLC showed that the 10th day of fermentation had the most complex secondary metabolites and the highest yield 0.086%. The results of antibacterial activity showed that the 10th day of fermentation had the largest inhibition zone with 7.75 ± 0.44 mm compared to the other days of fermentation

Antioxidant, analgetic, and anti-inflammatory activity test of purple leaf ethanol extract (Graptophyllum pictum L. Griff) in vitro and in vivo

Purple leaves are one of the plants that are widely used as medicine. Purple leaves have 3 types of plant varieties, namely purple leaves, green leaves, and white mottled leaves.  Purple leaves have pharmacological activities that can be used as medicine, including antioxidants (improving the deterioration of cells in the body), anti-inflammatory (reducing or suppressing inflammation), antidiabetic (lowering blood glucose levels), analgesics (relieving pain), immunomodulators (increasing the work of the immune system in the body), antihemorrhoids (treating symptoms and complaints of hemorrhoids), and antibacterial (as an antiseptic). The purpose of this study was to determine the antioxidant activity of purple leaf ethanol extract (Graphtophyllum pictum (L.) Griff) in vitro using the DPPH method and to determine its effectiveness as an analgesic and anti-inflammatory against Wistar rats.The results showed that antioxidant activity showed an IC50 value of 72.31 ppm (strong antioxidant). Meanwhile, in the analgetic test, the highest percentage of analgesic effectiveness was found at a dose of 100 mg/kg BW (129.64%) and showed anti-inflammatory activity at a dose of 100 mg/kgBW with a percentage decrease in edem volume of 28.73% at the sixth hour

Antibiotic consumption and resistance: a 3-years ecological study for four critical groups of bacteria in a general regional hospital

Pseudomonas aeruginosa, Acinetobacter baumannii, Escherichia coli, and Klebsiella pneumoniae are the most critical groups of multi-drug resistant (MDR) bacteria that cause a threat in hospitals. This study identified the trend of antibiotic consumption, antibiotic resistance pattern, and the relationship between antibiotic consumption and antibiotic resistance in a critical group of bacteria in a general regional hospital. This ecological study was based on retrospective data from inpatient databases in a general regional hospital over three years (2017-2019). The trend for annual antibiotic consumption over 2017-2019 was defined as defined daily doses/100 bed-days. The relationship between total antibiotic consumption and the percentage of antibiotic resistance among four isolated critical bacteria was explored in time series analysis and linear regression. The most frequently used antibiotic was ampicillin (220.33 DDD/100 bed-days), ciprofloxacin (126.86 DDD/100 bed-days), and ampicillin-sulbactam (126.34 DDD/100 bed-days). There was a significant relationship between antibiotic consumption (ampicillin, ampicillin-sulbactam, ceftazidime, gentamicin, amikacin, and ciprofloxacin) in DDD/100 bed-days and antibiotic resistance in E. coli, K. pneumoniae, and P. aeruginosa (p<0.05) but not statically significant in A. baumannii (p=0.062). The annual usage fluctuated or remained stable, with no statistically significant trends change. The relationship between antibiotic consumption and antibiotic resistance was significant in three out of four critical groups of bacteria

Sunscreen effectivity and physical characterization of avocado oil in nanoemulsion using isopropyl myristate variations

Unsaturated fatty acids in avocado oil can help reduce erythema brought on by prolonged UV-B exposure. The effectivity of sunscreen absorption into the skin will be enhanced by the use of isopropyl myristate (IPM) in nanoemulsion. The purpose of this study was to determine the physical characteristics and sunscreen effectiveness of avocado oil nanoemulsion (AVN) modified with IPM. 1% (FI), 3% (FII), and 5% (FIII) IPM variation were used to make AVN with 5% oil. The AVN were tested for physical characteristics such as organoleptic, pH, viscosity, rheology, particle size and polydispersity index (PI). The products were also tested for sunscreen effectivity by in vitro and Minimum Erythemal Dose (MED) method. The data obtained were analyzed statistically. The results showed that the AVN was pale yellow and clear with transmittance percentage were 96%. The rheogram showed that the products were newtonian. The pH values range were from 6.62 to 6.66; viscosity 1.65-1.84 dPa.s; particle size < 17 nm, zeta potential was in range of -30,54±1,72 to -37,85±3,11 and PI < 0.5 for all formula. In vitro SPF values were 16.43 ± 4.50 (FI), 16.27 ± 4.20 (FII) and 17.88 ± 3.20 (FIII) (p >0.05), and categorized as ultra protection. MED value were 12.28 ± 1.34 (FI); 12.51 ± 1.68 (FII); and 13.22 ± 1.84 (FIII) (p< 0.05) and categorized as maximum protection. Isopropyl myristate increased the sunscreen product's MED value without changing its physical characteristics