scholarly journals Sustainable Education with Local-Wisdom Based Natural Reagent for Green Chemical Analysis with a Smart Device: Experiences in Thailand

2021 ◽  
Vol 13 (20) ◽  
pp. 11147
Author(s):  
Kanokwan Kiwfo ◽  
Chonnipa Yeerum ◽  
Piyanat Issarangkura Na Ayutthaya ◽  
Kullapon Kesonkan ◽  
Siripat Suteerapataranon ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Chemistry Education ◽  
Assay Method ◽  
Smart Device ◽  
Chemical Waste ◽  
Sustainable Education ◽  
Responsible Consumption ◽  
Leaf Powder ◽  
Guava Leaves ◽  
Guava Leaf

To minimize chemical waste and protect the environment, our team has used green analysis with natural reagents. In this work, we designed a natural-reagent assay kit for iron determination and implemented it in chemistry education in Thailand. The iron assay method was adapted from Thai local wisdom of testing water quality using guava leaves. The guava leaf powder served as a natural reagent in the assay. The kit included equipment, standard and buffer solutions and a manual. A smart device with a built-in camera was used as a detector. Educators in six universities in Thailand implemented the kit in laboratories with modifications depending on their learning outcomes. The kit implementation was evaluated using a survey with questions in four aspects: usability, learning achievement, green chemistry and portability. The high average scores for all questions (> 4.00 of 5.00 points), with the average overall score of 4.53 ± 0.60, indicated satisfaction regarding in all aspects. Using a locally available bio-resource as a natural reagent for green analysis in chemistry education supported sustainable education in Thailand, in terms of quality education (SDG 4) and reduced inequalities (SDG 10) and environmental sustainability (SDG 6—Clean water and sanitation, 12—Responsible consumption and production and 14—Life be-low water).

scholarly journals A Study on Bioadsorption of Synthetic Dye Using Guava (Psidium guajava) Leaves

2020 ◽  
Vol 5 (9) ◽  
pp. 215-218
Author(s):  
Manasee Vichare ◽  
Prashant Masali
Keyword(s):  
Psidium Guajava ◽  
Water Bodies ◽  
Brilliant Blue ◽  
Tropical Region ◽  
Coomassie Brilliant Blue ◽  
Leaf Powder ◽  
Blue Solution ◽  
Guava Leaves ◽  
Guava Leaf ◽  
Coomassie Brilliant

Guava (Psidium guajava, white Indian) is common fruit bearing plant found throughout the Indian peninsula. It is said to be native to Mexico and Southern America and now can be found in many of the Asian countries. It is grown in tropical and sub-tropical region around the world. Guava leaves have shown many properties like antibacterial, bioadsorbent, etc. The bioadsorbent property can be exploited to remove coloured residues from water bodies. Problems like water pollution have arisen due to rapid industrialization and urbanization. Various harmful dyes like Coomassie brilliant blue, used in both textile industries and laboratories, are expelled into water bodies. To reduce the effects of such dye on ecology the research was carried out using guava leaves as bioadsorbent. That being the case the Coomassie brilliant blue solution at different pH was treated with guava leaf powder and the decrease in absorbance was noted at 625 nm. The Guava leaves were obtained from Mumbai suburban. The leaves were dried and powdered for further testing as bioadsorbent. All the chemicals have been used were of analytical grade. The study showed high absorption rate in acidic medium as the colour changed from dark blue to light blue. The optimum pH for bio-adsorption was found to be 3. As the amount of guava leaf powder increased, the rate of adsorption also increased. Guava leaf powder is effective as a bioadsorption as rate of adsorption increases with increase in guava leaf powder. With further optimization it can become potential source of adsorbent.

Efektivitas pencucian luka menggunakan daun jambu biji terhadap tingkat malodor klien luka kaki diabetik

2019 ◽  
Vol 8 (2) ◽  
pp. 152
Author(s):  
Adi Antoni ◽  
Yanna Wari Harahap
Keyword(s):  
Diabetic Foot ◽  
Rating Scale ◽  
Foot Ulcer ◽  
Diabetic Foot Ulcer ◽  
Numeric Rating Scale ◽  
P Value ◽  
Consecutive Sampling ◽  
Guava Leaves ◽  
Guava Leaf ◽  
Numeric Rating

Abstrak   Latar belakang: Diabetes mellitus (DM) merupakan penyakit kronik dan menjadi masalah global. Salah satu komplikasi yang ditimbulkan dari DM adalah luka kaki diabetic. Langkah awal dalam perawatan luka kaki diabetic adalah mencuci luka. Tujuan penelitian ini adalah mengetahui keefektifan dari rebusan daun jambu biji sebagai cairan pencuci luka terhadap tingkat malodor pada luka kaki diabetic. Metode: Desain penelitian yang digunakan adalah quasy experiment dengan rancangan one group pretests-posttest only. Teknik sampling yang digunakan adalah consecutive sampling dengan jumlah sampel 16 orang. Kriteria sampel yang digunakan adalah klien luka kaki diabetic, tingkat malodor 1-10 dengan NRS. Alat ukur yang digunakan adalah Numeric Rating Scale (NRS). Analisa data yang digunakan dalam penelitian ini menggunakan uji paired t test. Hasil: tingkat malodor sebelum intervensi pencucuan luka menggunakan rebusan daun jambu biji rata-rata sebesar 4.40 dan sesudah intervensi sebesart 2.44 dengan p value < 0.001. Selisih tingkat malodor antara sebelum dan sesudah intervensi sebesar 1.96. Hasil penelitian ini menunjukkan bahwa daun jambu dapat digunakan sebagai cairan pencuci luka dalam mengatasi tingkat malodor pada luka kaki diabetik. Kesimpulan : daun jambu biji dapat digunakan sebagai cairan pencuci luka pada luka kaki diabetic. Perawat diharapkan dapat memanfaatkan daun jambu biji sebagai salah satu alternatif dalam pencucian luka kronik khususnya luka kaki diabetik.   Kata kunci: Daun Jambu Biji, Tingkat Malodor, Luka Kaki Diabetik   Abstract   Background: Diabetes mellitus (DM) is a chronic disease and a global problem. One of the complications that arise from DM is diabetic foot ulcer. The first step in treating diabetic foot ulcer is washing the wound. The purpose of this study was to determine the effectiveness of guava leaf decoction as a washing fluid for malodor levels in diabetic foot ulcer. Method: The research design used was quasy experiment with one group pretests-posttest only design. The sampling technique used was consecutive sampling with a sample of 16 people. Sample criteria used were diabetic foot ulcer clients, malodor level 1-10 with NRS. The measuring instrument used is the Numeric Rating Scale (NRS). Analysis of the data used in this study used paired t test. Results: the level of malodor before intervening in wound washing using guava leaf decoctions on average was 4.40 and after the intervention was 2.44 with p value <0.001. The difference in the level of malodor between before and after the intervention was 1.96. The results of this study indicate that guava leaves can be used as a washing fluid in dealing with malodor levels in diabetic foot ulcer. Conclusion: Guava leaves can be used as a washing fluid for diabetic foot wounds. Nurses are expected to be able to use guava leaves as an alternative in washing chronic wounds, especially diabetic foot injuries.   Key words: Guava Leaf, Malodor Level, Diabetic foot ulcer.

Uji Aktivitas Antikolesterol Ekstrak Etanol Daun Jambu Air(Syzygium aqueum (Burm.f.)Alston) SecaraIn Vitro

2021 ◽  
Vol 1 ◽  
pp. 839-849
Author(s):  
Miranda Noviani ◽  
S Slamet ◽  
W Wirasti ◽  
Urmatul Waznah
Keyword(s):  
Ethanol Extract ◽  
Activity Analysis ◽  
Test Solution ◽  
Percent Reduction ◽  
Flavonoid Compounds ◽  
Cholesterol Levels ◽  
Body Tissues ◽  
Guava Leaves ◽  
Guava Leaf

AbstractCholesterol is a natural substance that has physical properties similar to fat but has the formula steroids. Cholesterol belongs to the non-hydrolyzed lipid group and is the main sterol in body tissues. When cholesterol levels increase, it can cause blockages in blood vessels. Several studies have explained that one of the compounds that can reduce cholesterol is flavonoid compounds, one of the plants containing flavonoid compounds is guava leaf (Syzygium aqueum (Burm.f.) Alston). The purpose of this study was to determine the activity and percent reduction in cholesterol levels and the EC50 value of the ethanol extract of guava leaves (Syzygium aqueum (Burm.f.) Alston) in vitro using UV-Vis spectrophotometry with a wavelength of 665 nm. Anticholesterol activity analysis was carried out using Lieberman-Burchard reagent with a test solution series of 150; 300; 450; 600; and 750 ppm. The results showed that the greater the concentration, the lower the absorbance produced and the higher the percent reduction in cholesterol levels. At a concentration of 750 ppm cholesterol decreased by 58.74%. And the obtained EC50 value of 462 ppm, which means at that concentration the ethanol extract of guava leaves (Syzygium aqueum (Burm.f.) Alston) can reduce 50% of the initial cholesterol.Keywords:Cholesterol, Guava leaf, In Vitro, Spectrophotometry UV-Vis, Syzygium aqueum (Burm.f.)Alston. AbstrakKolesterol merupakan suatu zat alami yang memiliki sifat fisik hampir sama dengan lemak tetapi memiliki rumus steroida. Kolesterol adalah sterol utama yang ada pada jaringan tubuh dan termasuk dalam golongan lipid yang tidak terhidrolisis. Apabila kadar kolesterol mengalami kenaikan, dapat menyebabkan penyumbatan pada pembuluh darah. Dari beberapa penelitian dijelaskan bahwa salah satu senyawa yang dapat menurunkan kolesterol adalah flavonoid, salah satu tanaman yang mengandung senyawa flavonoid adalah daun jambu air (Syzygium aqueum (Burm.f.)Alston). Tujuan dari penelitian ini adalah untuk mengetahui aktivitas dan persen penurunan kadar kolesterol serta nilai EC50 dari ekstrak etanol daun jambu air (Syzygium aqueum (Burm.f.)Alston) secara in vitro menggunakan spektrofotometri UV-Vis dengan panjang gelombang 665 nm. Analisis aktivitas antikolesterol dilakukan dengan menggunakan pereaksi Lieberman-Burchard dengan seri larutan sampeli 150; 300; 450; 600; dan 750 ppm. Hasil penelitian menunjukkan semakin besar konsentrasi, absorbansi yang dihasilkan adalah semakin rendah dan persen penurunan kadar kolesterolnya semakin tinggi. Pada konsentrasi 750 ppm terjadi penurunan kolesterol sebesar 58,74%. Dan diperoleh nilai EC50 sebesar 462 ppm yang artinya pada konsentrasi tersebut ekstrak etanol daun jambu air (Syzygium aqueum (Burm.f.)Alston) dapat menurunkan 50% dari kolesterol awal.Kata kunci: Daun jambu air;Kolesterol;In Vitro;Spektrofotometri UV-Vis;Syzygium aqueum (Burm.f.)Alston

Optimization, equilibrium, kinetic and thermodynamic studies on adsorptive remediation of phenol onto natural guava leaf powder

2019 ◽  
Vol 27 (17) ◽  
pp. 20576-20597 ◽  
Author(s):  
Muthamilselvi Ponnuchamy ◽  
Ashish Kapoor ◽  
Balamurugan Pakkirisamy ◽  
Prabhakar Sivaraman ◽  
Karthikeyan Ramasamy
Keyword(s):  
Thermodynamic Studies ◽  
Leaf Powder ◽  
Guava Leaf ◽  
Kinetic And Thermodynamic Studies

scholarly journals High Carbohydrate High Fat Diet Induced Hepatic Steatosis and Dyslipidemia Were Ameliorated by Psidium guajava Leaf Powder Supplementation in Rats

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Md. Abdullah Al Mamun ◽  
Md. Faruk ◽  
Md. Mizanur Rahman ◽  
Kamrun Nahar ◽  
Fariha Kabir ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Enzyme ◽  
Glucose Intolerance ◽  
High Fat Diet ◽  
Psidium Guajava ◽  
High Fat ◽  
High Carbohydrate ◽  
Leaf Powder ◽  
Guava Leaf ◽  
Enzyme Functions

Psidium guajava leaf is reported to contain many bioactive polyphenols which play an important role in the prevention and treatment of various diseases. Our investigation aimed to study the effect of Psidium guajava leaf powder supplementation on obesity and liver status by using experimental rats. To study the effects of guava leaf supplementation in high fat diet induced obesity, rats were randomly divided into four experimental groups (n=7), control (group I), control + guava leaf (group II), HCHF (group III), and HCHF + guava leaf (group IV). At the end of the experimental period (56 days), glucose intolerance, liver enzymes activities, antioxidant enzymes activities, and lipid and cholesterol profiles were evaluated. Our results revealed that guava leaf powder supplementation showed a significant reduction in fat deposition in obese rats. Moreover, liver enzyme functions were increased in high fat diet fed rats compared to the control rats significantly which were further ameliorated by guava leaf powder supplementation in high fat diet fed rats. High fat diet feeding also decreased the antioxidant enzyme functions and increased the lipid peroxidation products compared to the control rats. Guava leaf powder supplementation in high fat diet fed rats reduced the oxidative stress markers and reestablished antioxidant enzyme system in experimental animals. Guava leaf powder supplementation in high fat diet fed rats also showed a relative decrease in inflammatory cells infiltration and collagen deposition in the liver compared to the high fat diet fed rats. The present study suggests that the supplementation of guava leaf powder prevents obesity, improves glucose intolerance, and decreases inflammation and oxidative stress in liver of high carbohydrate high fat diet fed rats.

scholarly journals Antibacterial activity of GUAVA, Psidium guajava Linnaeus, leaf extracts on diarrhea-causing enteric bacteria isolated from Seabob shrimp, Xiphopenaeus kroyeri (Heller)

2008 ◽  
Vol 50 (1) ◽  
pp. 11-15 ◽  
Author(s):  
Flávia A. Gonçalves ◽  
Manoel Andrade Neto ◽  
José N. S. Bezerra ◽  
Andrew Macrae ◽  
Oscarina Viana de Sousa ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Essential Oil ◽  
Antimicrobial Effect ◽  
Enteric Bacteria ◽  
Psidium Guajava ◽  
Salmonella Spp ◽  
Leaf Extracts ◽  
Xiphopenaeus Kroyeri ◽  
Guava Leaves ◽  
Guava Leaf

Guava leaf tea of Psidium guajava Linnaeus is commonly used as a medicine against gastroenteritis and child diarrhea by those who cannot afford or do not have access to antibiotics. This study screened the antimicrobial effect of essential oils and methanol, hexane, ethyl acetate extracts from guava leaves. The extracts were tested against diarrhea-causing bacteria: Staphylococcus aureus, Salmonella spp. and Escherichia coli. Strains that were screened included isolates from seabob shrimp, Xiphopenaeus kroyeri (Heller) and laboratory-type strains. Of the bacteria tested, Staphylococcus aureus strains were most inhibited by the extracts. The methanol extract showed greatest bacterial inhibition. No statistically significant differences were observed between the tested extract concentrations and their effect. The essential oil extract showed inhibitory activity against S. aureus and Salmonella spp. The strains isolated from the shrimp showed some resistance to commercially available antibiotics. These data support the use of guava leaf-made medicines in diarrhea cases where access to commercial antibiotics is restricted. In conclusion, guava leaf extracts and essential oil are very active against S. aureus, thus making up important potential sources of new antimicrobial compounds.

scholarly journals FORMULASI DAN UJI PELEPASAN KRIM EKSTRAK ETANOL DAUN JAMBU BIJI DENGAN POTENSI ANTIJERAWAT

Jurnal Kimia ◽  
2020 ◽  
pp. 119
Author(s):  
N. P. Y. A. Dewi ◽  
N. L. G. W. Pebriani ◽  
P. A. Duarsa ◽  
P. C. I. Warnaya ◽  
I. D. A. A. D. Candraningrat ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Chemical Properties ◽  
Ethanol Extract ◽  
Physical And Chemical Properties ◽  
Guava Leaves ◽  
Guava Leaf ◽  
Optimum Formula ◽  
Physical And Chemical ◽  
Active Substances ◽  
And Chemical Properties

Guava leaves contain quercetin which can inhibit the growth of Propionibacterium acne. Thus, guava leaves have the potential to be anti-acne. Based on the benefits of guava leaves, it is necessary to formulate the ethanol extract of guava leaves in cream preparation and its characterization as well as to know the rate of releasing active substances. Preparation and standardization of guava leaf simplicia was carried out. After that, maceration, standardization and phytochemical screening of guava leaf ethanol extract were done. Positive extracts containing flavonoids were formulated into cream preparation. The concentration of stearic acid as emulgator of 14% and 18% was optimized. The formula was tested for physical and chemical properties such as organoleptic, spreadability, adhesion, viscosity and pH. The optimum formula was characterized using Franz diffusion test to determine the release of the active substance. The results showed that concentration of stearic acid as emulgator influenced the physical and chemical properties of the cream. Based on the results of this study it could be concluded that the optimum formula was stearic acid concentration of 14% with the release active substances for 3 hours of 2,5882 mg. Keywords: Guava leaves, acne, cream, stearic acid, diffusion

Effects of Guava Leaf Powder on the Quality of Seasoned Pork

2013 ◽  
Vol 19 (4) ◽  
pp. 1-12
Author(s):  
박영미 ◽  
김영중 ◽  
Hye Hyun Yoon ◽  
한병렬
Keyword(s):  
Leaf Powder ◽  
Guava Leaf

scholarly journals Android-based Disease Identification on Crystal Guava's Leaf using Enterprise Unified Process Method

2020 ◽  
Vol 2 (1) ◽  
pp. 1-8
Author(s):  
Ari Kurniawan Sudiarto ◽  
Khoirida Aelani ◽  
Fresa Dwi Juniar
Keyword(s):  
Guava Fruit ◽  
Disease Identification ◽  
Long Time ◽  
Unified Process ◽  
Application Identification ◽  
Farmer Groups ◽  
Guava Leaves ◽  
Guava Leaf ◽  
Apply Informatics ◽  
Process Method

Subang Crystal Guava farmer groups have problems in the management and maintenance of plants that are still carried out by way of going down outside the Operating System Procedure (SOP) provided by the Subang Agriculture Service, especially in the management of disease prevention or plant pests and harvesting of Crystal Guava fruit . This makes the process of checking yields take a long time if it has to be adjusted to the SOP provisions. One alternative solution that aims to provide direction and treatment to farmers in managing guava crystals is to apply informatics technology in the form of an application model built for disease identification on Android-based guava leaves. This application uses the camera facilities on mobile phones to take photos of guava leaf samples. The research method used is a software development method (Enterprise Unified Process) whose stages include Construction, Transition, and Production. Java as a programming language, and Android Studio Tools as the editor. Application Identification of diseases on the guava leaves that were built after the trial can be used by the Crystal Guava Farmers in the Subang farmer group as a tool to determine the disease in the guava plants so that a method is obtained to treat the guava plants with a yield that is harvested expected to be optimal.

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