scholarly journals Rosa sp and Hibiscus sabdariffa L Extract in Ethanol Fraction as Acid Base Indicator: Application of Green Chemistry in Education

2019 ◽  
Author(s):  
Nur Tsalits Fahman Mughni
Keyword(s):  
Green Chemistry ◽  
Raw Material ◽  
Hazardous Wastes ◽  
Hibiscus Sabdariffa ◽  
Acid Base ◽  
Renewable Materials ◽  
Chemistry Learning ◽  
Chemical Products ◽  
Method Of Extraction ◽  
Ethanol Fraction

Green Chemistry principal was introduced in an academic environment in the 1980s as guidelines for sustainable development focused on chemistry. Efforts to realize these expectations can be applied through education by developing learning process based on environmental. This study aims to apply the concept of Green Chemistry in education, especially chemistry learning by producing natural acid-base indicators from the extract of roses (Rosa sp) and Rosella (Hibiscus sabdariffa L). These indicators are produced by the method of extraction using 96% ethanol solvent in an acidic atmosphere at pH 3-4. The results of maceration then extracted in three different solvents (ethanol, n-hexane, and chloroform). The extract was tested in solution with pH 1-12 and used as an indicator to identify the solutions and titration in acid-base topic. It concluded that the roses and Rosella can be used as an alternative raw material for acid base indicator. The use of roses and Rosella indicates an attempt to have applied the principles of green chemistry, including the prevention of the formation of hazardous wastes, the design of safe chemical products, the use of renewable materials, the design of materials that are easily degraded, and the use of safe solvents.

scholarly journals Rosa sp and Hibiscus sabdariffa L extract in ethanol fraction as acid base indicator: Application of green chemistry in education

2019 ◽  
Vol 1402 ◽  
pp. 055041
Author(s):  
M Paristiowati ◽  
M Moersilah ◽  
M M Stephanie ◽  
Z Zulmanelis ◽  
R Idroes ◽  
...  
Keyword(s):  
Green Chemistry ◽  
Hibiscus Sabdariffa ◽  
Acid Base ◽  
Ethanol Fraction

Development of Ketchup from Sudanese Red karkade (Hibiscus sabdariffa L.) byproduct

Food Biology ◽  
1970 ◽  
pp. 19-23
Author(s):  
Nawal Abdel-Gayoum Abdel-Rahman
Keyword(s):  
Sensory Quality ◽  
Chemical Properties ◽  
Storage Period ◽  
Gum Arabic ◽  
Raw Material ◽  
Soluble Solids ◽  
Hibiscus Sabdariffa ◽  
Overall Acceptability ◽  
Physico Chemical ◽  
Tomato Ketchup

The aim of this study is to use of karkede (Hibiscus sabdariffa L.) byproduct as raw material to make ketchup instead of tomato. Ketchup is making of various pulps, but the best type made from tomatoes. Roselle having adequate amounts of macro and micro elements, and it is rich in source of anthocyanine. The ketchup made from pulped of waste of soaked karkede, and homogenized with starch, salt, sugar, ginger (Zingiber officinale), kusbara (Coriandrum sativum) and gum Arabic. Then processed and filled in glass bottles and stored at two different temperatures, ambient and refrigeration. The total solids, total soluble solids, pH, ash, total titratable acidity and vitamin C of ketchup were determined. As well as, total sugars, reducing sugars, colour density, and sodium chloride percentage were evaluated. The sensory quality of developed product was determined immediately and after processing, which included colour, taste, odour, consistency and overall acceptability. The suitability during storage included microbial growth, physico-chemical properties and sensory quality. The karkede ketchup was found free of contaminants throughout storage period at both storage temperatures. Physico-chemical properties were found to be significantly differences at p?0.05 level during storage. There were no differences between karkade ketchup and market tomato ketchup concerning odour, taste, odour, consistency and overall acceptability. These results are encouraging for use of roselle cycle as a raw material to make acceptable karkade ketchup.

scholarly journals Cotton stalk-derived hydrothermal carbon for methylene blue dye removal: investigation of the raw material plant tissues

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Libo Zhang ◽  
Junyan Tan ◽  
Gangying Xing ◽  
Xintong Dou ◽  
Xuqiang Guo
Keyword(s):  
Methylene Blue ◽  
Functional Materials ◽  
Raw Material ◽  
Plant Tissues ◽  
Chemical Compositions ◽  
Waste Biomass ◽  
Cotton Stalk ◽  
Acid Base ◽  
X Ray ◽  
Bet Analysis

AbstractConversion of the abundant agricultural residual cotton stalk (CS) into useful chemicals or functional materials could alleviate the fossil fuels caused energy shortages and environmental crises. Although some advances have been achieved, less attention has been paid to the plant tissues effect. In this study, the plant tissue of CS was changed by part degradation of some components (hemicelluloses and lignin, for example) with the aid of acid/base (or both). The pretreated CS was transformed into hydrochar by hydrothermal carbonization (HTC) method. Morphological and chemical compositions of CS hydrochar were analyzed by various techniques, including elemental analysis, Fourier transform infrared (FTIR), BET analysis, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Methylene blue (MB) removal of prepared CS hydrochar was used to evaluate CS hydrochar pollutions adsorption capacity. Results reveal acid/base (or both) pretreatment is beneficial for CS raw material to prepare high-quality CS hydrochar. The effects of some parameters, such as initial MB concentration, temperature, pH value and recyclability on the adsorption of MB onto both acid and base-pretreated CS hydrochar (CS-H2SO4 + NaOH-HTC) were studied. The present work exhibits the importance of agricultural waste biomass material plant tissues on its derived materials, which will have a positive effect on the direct utilization of waste biomass.

Tannins as a sustainable raw material for green chemistry: A review

2018 ◽  
Vol 126 ◽  
pp. 316-332 ◽  
Author(s):  
Younes Shirmohammadli ◽  
Davood Efhamisisi ◽  
Antonio Pizzi
Keyword(s):  
Green Chemistry ◽  
Raw Material

scholarly journals Intensification of the extraction process of phenolic compounds from Acorus calamus leaves

2021 ◽  
pp. 4-10
Author(s):  
Oleksiy Andryushayev ◽  
Olena Ruban ◽  
Yuliia Maslii ◽  
Inna Rusak
Keyword(s):  
Phenolic Compounds ◽  
Raw Materials ◽  
Extraction Process ◽  
Raw Material ◽  
Acorus Calamus ◽  
Optimal Conditions ◽  
Ultrasonic Action ◽  
Different Temperatures ◽  
Method Of Extraction ◽  
Temperature Time

The aim. To determine the intensified method of extraction of phenolic compounds from Acorus calamus leaves and optimal conditions for the process. Materials and methods. In order to develop the optimal intensified method of extraction samples were prepared in different conditions of raw materials-extractant ratio, temperature, time and multiplicity. As a raw materials spectrophotometrically pre-standardized Acorus calamus leaves were used. The extraction was carried out in a hermetically sealed ultrasonic extraction reactor PEX 1 (REUS, Contes, France). As the criteria of extraction efficiency were indicators of dry residue and total amount of flavonoids determined using methods described in State Pharmacopoeia of Ukraine. The amount of flavonoids was determined spectrophotometrically on a certified device Specord 200 (Analytik Jena, Germany). Results. According to our research results it was found that ultrasonic action and addition of surfactant significantly improves the efficiency of the extraction process. The optimal conditions for the process were determined. Experimentally proved that the rational raw material-extractant ratio is 1:15. Comparative study of the extraction process with different temperatures showed that the highest amount of extractives is achieved at temperature 70 °C and 45 min of duration. The optimal extraction multiplicity is 3. Conclusions. As a result of the study, the intensified extraction method for Acorus calamus leaves – re-maceration with ultrasound – was established. The conducted researches allowed to develop the method of extraction, expedient in the conditions of the modern pharmaceutical industry.

scholarly journals Green Chemistry Based Interactive Multimedia on Acid-Base Concept

2019 ◽  
Vol 1364 ◽  
pp. 012006
Author(s):  
M. Yustiqvar ◽  
G Gunawan ◽  
S Hadisaputra
Keyword(s):  
Green Chemistry ◽  
Interactive Multimedia ◽  
Acid Base ◽  
Base Concept

scholarly journals Preparation and Validated Analysis of Anthocyanin Concentrate from the Calyces of Hibiscus sabdariffa

2017 ◽  
Vol 12 (1) ◽  
pp. 1934578X1701200 ◽  
Author(s):  
Lubomir Opletal ◽  
Lucie Chocholousova-Havlikova ◽  
Tomas Siatka ◽  
Lucie Cahliková ◽  
Miroslav Locarek ◽  
...  
Keyword(s):  
Analytical Method ◽  
Anthocyanin Content ◽  
Hibiscus Sabdariffa ◽  
Chromatographic Purification ◽  
Purification Step ◽  
Extraction And Purification ◽  
Medicinal Properties ◽  
The Individual ◽  
Method Of Extraction ◽  
Column Chromatographic

Extracts of Hibiscus sabdariffa calyces have been shown to have various medicinal properties, some of which have been reported to be due to anthocyanins present in the calyces. To study whether these claims are valid, it is necessary to produce an extract with a high anthocyanin content and to have available a method to identify and quantify the individual compounds in the product. A method of extraction and purification has been developed based on a polyamide column chromatographic purification step. Using this method, anthocyanin concentrates were produced containing from 57 to 64% of delphinidin-3-sambubioside plus cyanidin-3-sambubioside. A rapid, efficient and validated HPLC analytical method was developed and used for the analysis of the anthocyanin concentrate.

scholarly journals Suitability of Roselle-Hibiscus sabdariffa L. as Raw Material for Soft Drink Production

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Serifat Olatundun Salami ◽  
Anthony Jide Afolayan
Keyword(s):  
Public Health ◽  
Blood Pressure ◽  
Soft Drink ◽  
Soft Drinks ◽  
Raw Material ◽  
Pharmacological Properties ◽  
Hibiscus Sabdariffa ◽  
Extreme Temperatures ◽  
Public Health Importance ◽  
Spoilage Microorganisms

Consumption of conventional soft drinks has been linked with several diseases in man. This has called for the consumption of natural soft drinks such as roselle drink. Roselle-Hibiscus sabdariffa L. is the major raw material for the production of beverage called cranberry (Florida), bissap (Egypt), zobo (Nigeria), and roselle drink generally. The nutritional and phytochemical properties found in roselle make the plant useful in the preparation of some drugs and food. It has been reported that consumption of roselle drink helps to cure diseases such as high blood pressure and diabetes. The pharmacological properties of the plant are traceable to activities of flavonoid and anthocyanin which are the major antioxidants in roselle. Good aroma and colour of the drink are among the characteristics displayed by the plant. However, consumers are sometimes exposed to risks when the drink is consumed after 24 hours of preparation due to the proliferation of spoilage microorganisms in the drink. Most of these microbes thrive even at extreme temperatures. Unfortunately, some of these microorganisms are of public health importance causing diseases such as meningitis and dysentery. Researchers have revealed that roselle calyx is the major source of contamination in the drink. This paper reviews the suitability of the plant for soft drink production. It further highlights the nutrition, pharmacology, and limitations of the plant for soft drink production.

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