The Potential of Clitoria ternatea L. Extracts as an Alternative Indicator in Acid-Base Titration

Experiments are an important part of the chemistry curriculum. An indicator in the form of a synthesis indicator is commonly used in acid-base materials experiments. The usage of synthetic indicators can result in waste that is both environmentally harmful and costly. The butterfly pea flower is one of the plants that contains anthocyanins, which have the potential to be used as an alternative indication of natural acids and bases. The study aims to determine the acid and base material curriculum and competency indicators, as well as the potential of butterfly pea flower extract as a substitute for synthesis indicators and the practicality of butterfly pea flower extract as a chemical experimental design in SMA/MA. This study employs a descriptive qualitative research method that includes literature review, observation, experimentation, and interviewing. The results showed that the relationship between acid-base materials and experiments was the determination of natural materials as acid-base indicators, the pH of the solution, the identification of acid-base properties, and acid-base titration. The butterfly pea flower indicator was produced from maceration extraction using 96% ethanol as the solvent. The butterfly pea flower indicator gives pink color at pH 1-2, reddish purple at pH 3, light purple at pH 4-5, turquoise at pH 6, bluish green at pH 7, light blue at pH 8-9, green at pH 10, yellowish green at pH 11, greenish yellow at pH 12-13, and yellow at pH 14. The titration step showed that butterfly pea flower indicators could replace synthetic indicators, namely phenolphthalein and methyl orange. Based on the analysis, the butterfly pea flower indicator can be used as an alternative indicator in acid base titration and an alternative experimental design in schools.

Comparison of Color Change to pH Range and Acid-Base Titration Indicator Precision Test of Multiple Ethanol Extracts

Natural indicators using anthocyanin compounds can be an alternative to synthetic indicators on acid-base titration because anthocyanin is an organic compound that is unstable with changes in pH. The extraction was carried out with ethanol because the compounds of anthocyanin were polar. This study was to ensure an ethanol extract of some plants could be used as an acid-base indicator that had a pH range of color change and the value of the equality parameter was not significantly different from the phenolphthalein indicator. The research method is to collect research journals on making natural indicators from ethanol extracts of various plants compared to phenolphthalein indicators so that secondary data from these journals can be processed statistically. Research results and conclusions: Based on the results of statistical data processing using the t-test there was no difference in the average pH of the phenolphthalein indicator with the average pH of ethanol extracts of adam air leaves (Rheo discolor), white frangipani flowers and Clitoria teratea L., with a significance value > 0.05 and the equality test (precision) had the requirements of good equality. HIGHLIGHTS Natural indicators are needed as a substitute for synthetic indicators in determining acid-base titrations; one of them is anthocyanin dye Research journals on making natural indicators from ethanol extracts of various plants compared to phenolphthalein indicators so that secondary data from these journals can be processed statistically There was no significant difference between the average pH of the phenolphthalein indicator and the average pH of the ethanol extract of Adam's Eve Leaves, ethanol extracts of white Cambodia flowers and ethanol extracts of Telang flowers in producing color changes GRAPHICAL ABSTRACT

A DEA MCDM Approach Applied to ESS8 Dataset for Measuring Immigration and Refugees Citizens’ Openness

The current refugees’ crisis is undermining the main government coalitions of many countries in the European Union (EU), and tolerant attitudes and open admission policies toward immigrants seem to be part of the recent past history. The dilemma is gaining a lot of media attention as the public and political debate on migration is now playing an important role in all the European elections. Thus, the aim of this paper twofold. First, an analytical tool is developed to measure two synthetic indicators: (1) the citizens’ openness towards immigration for 23 countries—18 EU Countries, plus Iceland, Israel, Norway, Switzerland, and Russia—included in the 2016 European Social Survey; and (2) the citizens’ openness towards immigrants and refugees for 22 countries (same set without Hungary). And second, the effects of political orientation of citizens over the last synthetic indicator (immigrants and refugees) are studied. The approach of Data Envelopment Analysis (DEA) will be adopted here, with the purpose of identifying which countries are more, or less, open to the phenomenon of immigration and refugees. The results show that the Nordic countries and leftist are those which show more openness to immigration and refugees.

Liveability Versus Sustainability in Spanish Cities: First Evidences Using Synthetic Indicators

The aim of liveable, sustainable cities has become one of the major challenges for urban planning. However, achieving both goals at the same time is no easy task, particularly when liveability and sustainability may be defined by certain elements that tend to be in conflict. The main goal of this work is to analyse the relationship between liveability and environmental sustainability within the context of Spanish urban spaces. To this end, we propose two synthetic indicators: one for liveability and the other for urban environmental sustainability. Each of these indicators is constructed using a technique based on goal programming. A bivariate analysis is carried out using these indicators, which allows us to compare the extent to which Spanish cities are liveable and sustainable. This analysis should be useful for urban planners when taking and implementing policy decisions. By comparing cities with similar profiles using a benchmarking system, it becomes possible to judge the margin for improvement in one attribute without detriment to the other. This benchmarking system also allows us to reveal the specific dimensions of liveability or sustainability for which there is the greatest opportunity for improvement.

PENENTUAN SIFAT LARUTAN ASAM, BASA, DAN GARAM DENGAN INDIKATOR EKSTRAK DAUN TANAMAN HIAS

Learning Natural Sciences (IPA) is not only taught by means of lectures or memorization, but by experimental or demonstration methods, so that it is more active for students. In the experiment of acid-base solutions in science class VII SMP/MTs, natural indicators were used as a test solution to replace synthetic indicators. In addition to making students active, it also minimizes practicum costs. This experiment used leaf extracts of ornamental plants such as miana, butterfly and red purslane which were made together with students and teachers. After comparing the test results between synthetic indicators (litmus paper and phenolphthalein) with homemade natural indicators, it can be concluded that the extract can be used as an alternative to the solution test. Because there are different changes when dropped into an acid and alkaline solution. When tested the pH of the solution using the extract indicator, there was a change in the pH range in an acid solution of 3.2 and a base solution of 10.8. By observing the color change, it can be concluded that ornamental plant extracts can be used as an alternative to acid-base indicators to replace synthetic indicators. For miana the color changes from orange (acidic) – brownish yellow – light green (alkaline), red purslane from pink (acidic) – dark red to dark brown (alkaline) and butterfly from red (acid) – purple - to green (base). ABSTRAKPembelajaran Ilmu Pengetahuan Alam (IPA) tidak hanya diajarkan dengan cara ceramah atau menghafal saja melainkan dengan metode eksperimen atau demonstrasi, sehingga lebih mengaktifkan siswa. Pada percobaan larutan asam-basa dalam IPA kelas VII SMP/MTs digunakan indikator alamiah sebagai uji larutan menggantikan indikator sintetis. Selain membuat siswa aktif juga meminimalisir biaya praktiku=m. Percobaan ini digunakan ekstrak daun tanaman hias seperti miana, kupu-kupu dan krokot merah yang dibuat bersama-sama siswa dengan guru. Setelah membandingkan hasil uji antara indikator sintetis (kertas lakmus dan fenolftalein) dengan indikator alamiah buatan sendiri dapat disimpulkan bahwa ekstrak tersebut dapat digunakan sebagai alternatif untuk uji larutan. Karena terdapat perubahan yang berbeda saat diteteskan ke dalam larutan asam dan basa. Saat diuji pH larutan dengan menggunakan indikator ekstrak tersebut terdapat perubahan rentang pH dalam larutan asam 3,2 dan larutan basa 10,8. Dengan mengamati perubahan warna dapat diambil kesimpulan bahwa ekstrak tanaman hias dapat digunakan sebagai alternatif indikator asam basa menggantikan indikator sintetis. Untuk miana perubahan warna dari oranye (asam) – kuning kecoklatan – hijau muda (basa), krokot merah dari merah muda (asam) – merah tua menjadi coklat tua (basa) dan kupu-kupu dari merah (asam) – ungu - menjadi hijau (basa).

The Effects of Natural and Economic Factors on the Financial Performance of Forest Management Units: The Example of Forest Districts of the State Forests National Forest Holding from Eastern Poland

Given the changing market conditions and uncertainty arising from climate change, forest management tends to focus on the financial functioning of forest holdings. The objective of this work is to study the financial performance of forest districts using ratio analysis, synthetic financial indicators, as well as the relationship between synthetic indicators and forest district categories defined in terms of forest site type, site fertility, compatibility stand species composition, species composition, harvesting system, harvesting intensity, fragmentation of forest complexes and management difficulty level. The study material consists of financial documentation from 82 forest districts of the State Forests National Forest Holding (SFNFH) in eastern Poland from the years 2015–2019 and 2005–2009 (for comparison purposes). Synthetic indicators were calculated using two sets of financial ratios as well as two variants of accounting data. In the study period, forest districts were found to differ in terms of their financial performance, which was affected by the natural and economic factors. The synthetic indicators were significantly higher (p > 0.05) for forest districts operating on low-fertility lowland sites, those managing stands with dominant pine, and those implementing a clearcutting regeneration system. The findings concerning the effects of selected natural and economic factors on the financial condition of forest districts may be used for financial planning and management by SFNFH, in particular in decision-making processes to optimize forest management. The applied methods may stand as a basis for the construction of a sectoral evaluation tool.

Inclusive development of social entrepreneurship in nature management

Social entrepreneurship development in Ukraine is a priority guideline based on the creation and improvement of government policy on ecosystem orientation and inclusion, which provides public access to tourism and natural resources. The main component of inclusive development of social entrepreneurship emphasizes the basic principles of its existence, such as the ability to achieve one’s own goals, despite the economic effect of one’s activities. In the quantitative comparative analysis and need to reach economic indicators, the main factors are determined by the idea of inclusive development in nature management, as a field of activity in which not only the state but also multidisciplinary international organizations invest. The aim of the article is to identify opportunities for inclusive nature management development in social entrepreneurship in Ukraine by summarizing the existing practice of using indices and identifying indicators that will correspond to inclusive nature management parameters. Determining the position and directions of social entrepreneurship development in Ukraine was determined using an index approach, which, in contrast to others, allows one to identify indicators that characterize the sphere of development on economic and environmental influence of the country on the basis of inclusivity. The analysis of international rating assessments and Ukraine’s place in them requires a rethinking of existing approaches to the search for economically feasible ways to improve socio-economic and environmental indicators and their rating positions. The method of multi-indicator immersion is used in the article to identify the main indicators of economic, inclusive growth and social components, which are due to the experience in nature management and characterize the development of social entrepreneurship. The calculations of the Inclusive Development Index of Social Entrepreneurship in Ukraine as a consolidated index according to the geometric formula, which comprised synthetic indicators of the human capital index to outline the inclusive range of components, brand index and index of environmental indicators, proved that today the ecological state of environment and health of the population have a significant negative impact on economic growth and welfare of the population.

CIRCULAR ECONOMY AND INNOVATIVE ENTREPRENEURSHIP, PREREQUISITES FOR SOCIAL PROGRESS

Quality of life and social welfare are objectives of the social policy of any state. The study aims to identify the influence of factors such as the circular economy, digital innovation, sustainable entrepreneurship on social progress and completes the current approach identified in the literature by assessing the dependencies between the phenomena represented by them. The quantification of the influences of the enumerated factors on social progress was achieved by identifying some synthetic indicators, such as composite indices, which would surprise the complexity of the analyzed phenomena. To measure the progress of the transition to the circular economy – using multivariate analysis methods – a composite indicator has been proposed and determined that allows the ranking of EU states according to its orientation, as a premise of social progress, and can substantiate the adjustment national policies. The integration of the proposed indicator in the regression models used, with similar indices, is done to highlight the impact of the circular economy, innovation and sustainable entrepreneurship on social progress. Thus, the adaptation of digital technologies in current business models, the development of sustainable innovative entrepreneurship support the transition from the linear economy to a circular economy and offer new study opportunities.

Isolation of Natural Acid Base Indicator from the Flower Extract of Sarca Asoca, Abelmoschus Esulentus, Hibisucs Cannabinus And Hibiscus Rosa Sinensis

The objective of this work is to use more plant indicators than chemical based indicators. Saraca asoca is a species of family Fabaceae and Abelmoschus esculentus and Hibiscus cannabinus is a species of family Malvaceae [1]. Indicator are very special chemicals, they change colour of the solution with change in pH by adding acid or alkali. In the present work acid base titration has been performed by using natural indicators. The natural indicator is prepared from the most commonly occurring flower Hibiscus cannabinus, Abelmoschus esculentus Saraca asoca and Hibiscus Rosa sinensis. Aqueous and methanolic extract of flower were used as natural indicator. One acid one base were selected for acid base titration. Vinegar is used as acid and caustic soda is used as base. The results obtained by the natural indicator are almost similar to the result given by the synthetic indicators. Thus, natural indicator from flowers can be used for acid base titration [2]. Using aqueous extract of flower as indicator is more economical and with the same accuracy of result as that given by synthetic indicators.