Antioxidant Activity of Uli Banana Peel Extract (Musa x Paradisiaca L. AAB)

Banana plants are native to Indonesia wich are easy to find and have various benefits ranging from roots, stems, fruits until peel. Uli banana (Musa x Paradisiaca L. AAB) is one kind of processed banana that is easy to find. The study aimed to determine the antioxidant activity of banana peel extract of uli (Musa x Paradisiaca L. AAB) wich was carried out by maceration using n-hexane and ethanol solvents then fractionated with ethyl acetate and distilled water. Phytochemical screening showed that the uli banana peel extract contained flavonoids and tannins. Antioxidant activity was measured by using UV-Vis Spectrophotometry with the DPPH (2-2, diphenyl-1-picrylhydrazyl) method and IC50 (Inhibitory Concentration) test parameters. The results showed that the antioxidant activity of IC50 was 114.86 µg/ml which was classified as moderate antioxidant intensity.

The Illness Experience of Veterans With Dementia: Perceived Measures Related to Depressive Symptoms

Recent work has examined how individuals with dementia (IWDs) experience their illness, although few studies have looked at IWDs who report heightened depressive symptoms, a key well-being outcome. Stressing the ability of IWDs to self-report and guided by the Stress Process Model for Individuals with Dementia, this study examined the relationships between depressive symptoms and various aspects of the illness experience including objective cognition, perceived memory difficulty, perceived functional difficulty, and dyadic relationship strain. The sample includes IWDs with mild to severe dementia who are veterans (N=69). Significant positive correlations emerged between depressive symptoms and several measures of the illness experience: perceived cognition (r=.48, p<.001), perceived function (r =.43, p<.001), and dyadic relationship strain (r=.32, p=.01). In contrast, objective cognition, measured by a modified version of the Blessed Orientation Memory Concentration test, was not significant (r =-.06, p=.63). A multiple regression found the total variance explained by all independent variables was 32% (R2=.32, F(4,68)=7.58, p<.001), with perceived memory difficulty (B=.26, p<.01) and dyadic relationship strain (B=.25, p=.04) accounting for unique and significant variance in depressive symptoms. A mediation analysis indicated perceived memory difficulty fully mediated the relationship between perceived functional difficulty and depressive symptoms. Findings highlight the importance of IWDs perceptions of their illness experience for psychosocial well-being outcomes, such as depressive symptoms. Findings add to the literature by showing the importance of IWDs perceptions of their illness and their impact on well-being outcomes. Results also demonstrate the utility and feasibility of including self-reported data from IWDs in research studies.

Relationship of Speed, Reaction and Concentration to the Achievement of Precision Landing of Gliding Athletes DKI Jakarta

The purpose of this study is to determine the relationship between reaction speed, concentration, and precision landing performance of DKI Jakarta gliding athletes. This study uses the quantitative method by survey technique method. Samples are 13 athletes of DKI Jakarta gliding. In order to get the data, the athlete was tested with reaction speed test, concentration test, and precision landing test. The technique of analyzing the data is correlation technique. The result of this study shown that the correlation between reaction speed, concentration, and precision landing performance is 40.3%, where the reaction speed has 38.3% correlation (strong correlation) to precision landing and concentration has 2.8% correlation to precision landing (weak correlation). So the conclusion is reaction speed has a strong correlation to precision landing while concentration has weak correlation to precision landing.

Fitoakumulasi Logam Berat Pb dan Cr pada Rhizophora mucronata di Sekitar Kawasan Bekas Tambang Bauksit, Pulau Bintan

Bintan Island has a high potential for bauxite mining. Many ex-mining areas have not been reclaimed properly, resulting in erosion and accumulation of heavy metals Pb and Cr which are high in the sediment (red-mud) and deposited in the roots of mangrove forests on the coast of Bintan. Rhizophora mucronata is one of the species that dominates the Bintan mangrove forest. The purpose of this study was to determine the phytoaccumulation of Pb and Cr metals in R. mucronata in the former bauxite mining area ofBintan Island. This research was conducted by survey, digested and analysed using Atomic Absorption Spectrophotometer (AAS). The concentrationof Pb and Cr in the sediment, as well as the roots, stems and leaves of R. mucronata were used for the analysis of phytoaccumulation types. The results of the Pb concentration test were higher than Cr. Based on the sampling location, the concentration of Pb metal accumulation in the sediment is Tembeling <Sei Carang <Wacopek <Senggarang, while Cr metal is Tembeling <Wacopek <Sei Carang <Senggarang. The highest metals accumulation in R. mucronata was found in the roots (Pb = 3,3482 ppm, Cr = 0,7664 ppm), while the leaves (Pb = 1,1076 ppm, Cr = 0,0413 ppm) had the lowest concentration. Based on the type of accumulation, R. mucronata absorbs Pb metal with a rhizofiltration mechanism (TF <1), which means that the roots of R. mucronata effectively translocate Pb as a pollutant to its body from the soil. In addition, the bio-concentration factor (BCF) concentration of R. mucronata <1 indicates the role of R. mucronata as a plant that accumulates very little Pb (low accumulator/non-hyperaccumulator). This adaptation mechanism is important information in the rehabilitation of mangrove areas using R. mucronata, because it can still live and grow in an environment contaminated with Pb metal by absorbing a little Pb from the soil and translocating it effectively in its organs.

UJI IN VITRO AKTIVITAS ANTIBAKTERI EKSTRAK CANGKANG BIJI KARET DAN BIJI KARET TERHADAP Aeromonas hydrophila

Catfish is one of leading fishery commodity in Indonesia that nowadays is using intensive technology. One of the problems in cultivating catfish is the invasion of bacteria Aeromonas hyprophila which can cause Motile Aetomonas Septicemia disease. Information regarding the antibacterial activity of shell and rubber seed extract on Aeromonas hydrophila is not yet known. Therefore it is necessary to do a research about the antibacterial activities of the shell and rubber seed extract against the pathogenic bacteria, Aeromonas hydrophila. This research method was sample preparation, extraction, phytochemical test, preparation of bacterial suspension, antibacterial test with agar diffusion method, minimum inhibitory concentration test. The result shows that the rubber seed shell extract contains antibacterial compounds such as saponin, terpenoids and flavonoids. While the rubber seed extract contains terpenoid and flavonoid compounds. The shell and rubber seed extract at a concentration of 0.5-4 mg/mL showed very weak inhibition.

Measurement of attention based on physical activity levels of secondary school students

The goal of this study is to investigate whether or not the attention level of middle school students’ changes depends on their physical activity. Fourty middle-school students who have been taking education in Yalova province joined the study as a volunteer. Fifty percent of the participants are male and the others are female. The experimental and the control groups have been formed and each of these groups consisted of 10 male and 10 female students. International physical activity questionnaire short form and Burdon concentration test were used as the information gathering instruments. To compare the experimental groups with the control groups, a T-test was used for independent groups. To compare one to another participant in each group, also T-test was used for dependent groups. Using the international physical activity questionnaire short form, preliminary and final tests were applied to each participant. According to the results of the questionnaire, weekly MET values of each participant were calculated. At the beginning of the study, the Burdon concentration test applied to each participant. Our study has finished in eight weeks. The physical activity levels of the control group were kept constant and no information was given. Twenty pieces of Xiaomi-mi-band-3 smart bracelets were supplied to the experimental group and they were informed about the features of these devices. At the end of 8 weeks period, the international physical activity questionnaire short form and Burdon concentration test were applied to each participant again. According to the physical activity levels of the control group, no significant difference has been found between the results of the Burdon concentration test (p > 0.05). But according to the physical activity levels of the experimental group, a significant difference has been found between the results of the Burdon concentration test (p < 0.05). As a result, it has been observed that an increase in levels of physical activity provides an increase in concentration. In conclusion, it is seen that many students and young people have low levels of physical activity due to both lifestyle and virtual world dependence. Although there are many factors, the decrease in physical activity causes low levels of attention. The better the attention levels of our students and young people, the more successful they will be in their lives. Our study and most of the mentioned studies reveal that attention is a developable skill and a situational factor that is open to influence. Therefore, attention development in children who are directed to recreational activities should be emphasized, especially during periods of rapid physical growth. If we want our students and young people to be more successful, they should be encouraged and supported more about physical activity.