scholarly journals Perbandingan Aktivitas Diuretik pada Berbagai Produk Seduhan Teh Hijau(Camellia sinensis L.)

2021 ◽  
Vol 6 ◽  
pp. 71
Author(s):  
Agustina Susilowati ◽  
Nur Karim Kusuma Ramadhan
Keyword(s):  
Green Tea ◽  
Camellia Sinensis ◽  
White Tea

Hipertensi merupakan masalah kesehatan yang berbahaya karena memiliki faktor resiko yang mengarah pada penyakit kardiovaskuler. Penggunaan diuretik berperan dalam terapi pengobatan seperti hipertensi, gagal jantung, serta edema. Diketahui bahwa teh hijau dapat berkhasiat sebagai diuretik. Penelitian ini bertujuan mengetahui perbandingan aktivitas diuretik pada berbagai produk teh hijau (Camellia sinensis L.). Pada uji aktivitas diuretik, 30 ekor mencit di bagi menjadi 6 kelompok yang terdiri dari kelompok I (CMC. Na 1%), Kelompok II (Furosemid), Kelompok III, IV, V dan VI merupakan kelompok perlakuan yang terdiri dari pemberian seduhan White Tea, Yellow Tea, Black Dragon Tea Dan Green Tea Premium dengan dosis 2g, 4g dan 6g yang diseduh dengan 200ml air suhu 70οC selama 5-15 menit. Pengukuran urin dilakukan setiap 1 jam selama 6 jam. Analisa data dilakukan dengan menggunakan spss versi 26 dengan taraf kepercayaan 95%. Seduhan white tea, yellow tea, dan  black dragon tea pada dosis 2g tidak memiliki efek diuretik (p>0,05) sedangkan green tea premium 2g memiliki aktivitas diuretik namun lebih rendah dibandingkan dengan furosemid. Pada dosis 4g, white tea, yellow tea dan green tea premium memiliki aktivitas sebagai diuretik (p<0,05) namun masih lebih rendah dibandingkan dengan furosemid. Pada dosis 6g, white tea, yellow tea, black dragon tea memiliki aktivitas sebagai diuretik (p<0,05) namun masih lebih rendah dibandingkan dengan furosemid, sedangkan green tea premium  dosis 6g memiliki aktivitas diuretik yang sebanding dengan furosemid (p>0,05). Dapat disimpulkan bahwa white tea, yellow tea, black dragon tea, dan green tea premium  dosis 6g memiliki aktivitas diuretik.

scholarly journals CONCENTRAÇÃO DE CAFEÍNA EM Camellia sinensis

2018 ◽  
Vol 10 (3) ◽  
pp. 09-15
Author(s):  
Daniele Nascimento Silva ◽  
Marielle Flaviane de Carvalho Pimentel ◽  
Daniel Ângelo Macena ◽  
Vinícius Marques Gomes
Keyword(s):  
Green Tea ◽  
Camellia Sinensis ◽  
Black Tea ◽  
Ultraviolet Region ◽  
Physiological Effects ◽  
Chemical Dependence ◽  
White Tea ◽  
Low Concentrations ◽  
The World

Considering that tea is the second most consumed drink in the world it is important not to have excess caffeine in its composition since it causes some physiological effects to humanhealth such as diuretic and chemical dependence. The present project had as objective to compare the results obtained from the determination of caffeine in teas from the Camellia sinensis species with those found in the literature. For that, three samplesof white tea, three of green tea and three of black tea of the same brand were used. The analyzes were performed in triplicates and caffeine determined by spectrophotometry in the ultraviolet region. Black tea had the highest caffeine content (0.106 mg / g), white tea 0.082 mg / g and green tea the lowest (0.067 mg / g). However, the three types of teas have low concentrations when compared to the literature that presented values between 14.3 and 40.0 mg / g of caffeine of tea.

scholarly journals Catechin Contents, Antioxidant and Antibacterial Activities of Different Types of Indonesian Tea (Camellia sinensis)

2021 ◽  
Vol 24 (2) ◽  
pp. 106
Author(s):  
Isa Nuryana ◽  
Shanti Ratnakomala ◽  
Fahrurrozi Fahrurrozi ◽  
Ario Betha Juanssilfero ◽  
Ade Andriani ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Green Tea ◽  
Camellia Sinensis ◽  
High Performance ◽  
Micrococcus Luteus ◽  
Antibacterial Properties ◽  
Black Tea ◽  
Antibacterial Activities ◽  
Bacterial Strains ◽  
White Tea

Tea is one of the most popular beverages in the world. Produced from Camellia sinensis leaves, tea has been studied to provide health benefits due to the content of important metabolites. This study aimed to investigate the catechin contents, antioxidant, and antibacterial activities of Indonesian tea varieties, namely green tea, black tea, and white tea. Tea infusion was prepared by extracting 1 g of each sample into 10 mL of distilled water and incubated at 80 °C for 60 min. The catechin and epigallocatechin gallate (EGCG) contents of tea extracts were determined using high-performance liquid chromatography (HPLC). Antioxidant activity was measured using the free radical method with 2,2-diphenyl-1-pycrylhidrazyl (DPPH), while antimicrobial activity was assesed using paper disc diffusion assay. The results indicated that green tea had the highest contents of catechin (646 ± 17.14 mg/L) and EGCG (997.8 ± 36.72 mg/L), and antioxidant activity with IC50 of  5.65 µg/mL. Furthermore, green tea and white tea extracts showed inhibitory activity against Gram-positive bacteria such as Micrococcus luteus, Bacillus subtilis, and Staphylococcus aureus whereas black tea had no activity against all bacterial strains tested. Generally, we concluded that white tea and green tea contributed to the higher content of catechins and exhibited strong antioxidant and antibacterial properties.

scholarly journals Comparative Analysis of the Polyphenols, Caffeine, and Antioxidant Activities of Green Tea, White Tea, and Flowers from Azorean Camellia sinensis Varieties Affected by Different Harvested and Processing Conditions

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 183
Author(s):  
Lisete Paiva ◽  
Clara Rego ◽  
Elisabete Lima ◽  
Massimo Marcone ◽  
José Baptista
Keyword(s):  
Green Tea ◽  
Camellia Sinensis ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Butylated Hydroxytoluene ◽  
Processing Conditions ◽  
Time Pattern ◽  
Antioxidant Power ◽  
White Tea ◽  
Dried Extract

This study evaluates the polyphenol profiles as well as caffeine (dry weight basis), and antioxidant activities of green tea (GTs), white tea (WTs), and flowers (Fl) samples from Azorean Camellia sinensis varieties affected by different harvested and processing conditions. Epicatechins derivatives, determined by RP-HPLC/PDAD, presented higher values in GTs with respect to WTs, decreasing as follows: epigallocatechin-3-gallate > epicatechin-3-gallate ≫ epicatechin ≫ epigallocatechin, and higher values in summer and early autumn than in spring. This was also accompanied by an in consistent withering time pattern. Esterified catechins were higher in all samples (100.8–312.3 mg/g) with respect to non-esterified catechins (15.1–37.7 mg/g). Caffeine (6.2–27.7 mg/g) decreased as follows: WTs > GTs ≫ Fl, and inconsistent seasonal and withering patterns were observed among the WTs. Total phenolics (125.9–295.4 mg gallic acid equivalents/g dried extract) and total flavonoids (35.2–69.7 mg rutin equivalents/g dried extract), determined by Folin–Ciocalteu and colorimetric methodologies, were higher in GTs than in WTs and Fl. Concerning the antioxidant patterns, the free radical scavenging activity (FRSA) and ferric reducing antioxidant power (FRAP) presented EC50 values ranges from 3.6 to 17.3 µg/mL and 4.8 to 16.5 µg/mL, respectively, and ferrous ion-chelating (FIC) activity ranged from 47.1 to 82.8%, highlighting that FRSA was better than butylated hydroxytoluene (BHT). Tea leaves exhibited, in general, higher activities with respect to tea Fl, and the WT sample plucked in summer and withered for 23 h showed the highest FRAP and FIC activity. In conclusion, this study shows the characteristic variation of GTs, WTs, and Fl of two tea varieties and may support crop quality improvement and promote the valorization of tea Fl.

Effect of Green Tea (Camellia Sinensis) On Liver Enzymes of the Rats Receiving CiclosporinA

2013 ◽  
Vol 2 (7) ◽  
Author(s):  
M. Negahdary ◽  
R. Chelongar ◽  
S. Papi ◽  
A. Noori ◽  
R. Rahimzadeh ◽  
...  
Keyword(s):  
Green Tea ◽  
Camellia Sinensis ◽  
Liver Enzymes

Versatile Health Benefits of Catechin from Green Tea (Camellia sinensis)

2019 ◽  
Vol 15 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Satheesh Babu Natarajan ◽  
Suriyakala Perumal Chandran ◽  
Sahar Husain Khan ◽  
Packiyaraj Natarajan ◽  
Karthiyaraj Rengarajan
Keyword(s):  
Green Tea ◽  
Camellia Sinensis ◽  
Health Benefits ◽  
Epigallocatechin Gallate ◽  
Extraction Methods ◽  
Major Constituent ◽  
Epicatechin Gallate ◽  
Wide Range ◽  
Green Tea Catechin ◽  
Anti Inflammatory

Background: Tea (Camellia sinensis, Theaceae) is the second most consumed beverage in the world. Green tea is the least processed and thus contain rich antioxidant level, and believed to have most of the health benefits. </p><p> Methods: We commenced to search bibliographic collection of peer reviewed research articles and review articles to meet the objective of this study. </p><p> Results: From this study, we found that the tea beverage contains catechins are believed to have a wide range of health benefits which includes neuroprotective, anti-inflammatory, antiulcer, antiviral, antibacterial, and anti-parasitic effects. The four major catechin compounds of green tea are epigallocatechin (EGC), epicatechin (EC), epigallocatechin gallate (EGCG), and epicatechin gallate (ECG), of which EGCG is the major constituent and representing 50-80% of the total catechin content. And also contain xanthine derivatives such as caffeine, theophylline, and theobromine, and the glutamide derivative theanine. It also contains many nutritional components, such as vitamin E, vitamin C, fluoride, and potassium. We sum up the various green tea phytoconstituents, extraction methods, and its medicinal applications. </p><p> Conclusion: In this review article, we have summarized the pharmacological importance of green tea catechin which includes antioxidant potential, anti-inflammatory, antimicrobial, anticancer, antidiabetic and cosmetic application.

Different applications forms of green tea ( Camellia sinensis (L.) Kuntze) for the treatment of periodontitis: a systematic review and meta‐analysis

2021 ◽  
Author(s):  
Jéssica G. A. Melo ◽  
Jossaria P. Sousa ◽  
Ramon T. Firmino ◽  
Carolina C. Matins ◽  
Ana Flávia Granville‐Garcia ◽  
...  
Keyword(s):  
Systematic Review ◽  
Green Tea ◽  
Camellia Sinensis ◽  
Meta Analysis
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