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Jurnal Penelitian Teh dan Kina
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Jurnal Penelitian Teh dan Kina is an national journal providing rapid publication of peer-reviewed articles concerned with tea and cinchona commodities based on the aspects, agronomy, plant breeding, soil science, crop protection, postharvest technology and social economy. Papers dealing with result of original research on the above aspects are welcomed with no page charge.
Articles
85
Articles
Inhibition activity of α-glucosidase by infusion and ethanol extract of white tea and stevia combination

Trinoviani, Elvi, Kholisoh, Ai, Ar-Rifa, Nisa Fitriani, Rustamsyah, Ardi

Jurnal Penelitian Teh dan Kina Vol 19, No 2 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Ethanol extract of white tea and its stevia liquor was observed for α-glukosidase inhibition. The research was divided into some steps;  white tea and stevia combination hedonic sensory test, phytochemical identification, and α-glucosidase inhibition activity. The result of hedonic sensory test incline towards formula 2 which consist 75% of white tea and 25% stevia. Further, this formulation was extracted by ethanol for α-glucosidase inhibition activity test. Formulation 2 liquor tested for enzyme inhibition activity showed IC50 value was 36,96 µg/ml, better than ethanol extract and acarbose. Phytochemical identification presented that both preparations contained alkaloids, flavonoids, saponins, tannins, triterpenes/steroid, and quinones.

Antidiabetic mellitus activity of low grade black tea in alloxan induced male albino mice

Deswati, Dytha Andri, Maryam, Zahra Nur

Jurnal Penelitian Teh dan Kina Vol 19, No 2 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Tea (Camellia sinensis [L]) has a very potential character of quality and biological activities. Potential activity of black tea such as antidiabetic been proven by several studies. Grade of black tea was classified based on colour, shape, size and density of particles.  This study aims to evaluate the most optimal antidiabetic activity of low grade black teas;BT II, DUST III, BBL and BTL in alloxan induced male albino mice. The results showed that liquor of black tea grade DUST III has blood glucose lowering activity with the most optimal percentage reduction 49.07% with a significant difference in the positive control group (p <0.05).

The effect of drought period on attack intensity of Empoasca sp and blister blight in Gambung tea plantation

Rezamela, Erdiansyah, Fauziah, Fani, Dalimoenthe, Salwa Lubnan

Jurnal Penelitian Teh dan Kina Vol 19, No 2 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

El-Nino had a significant impact on micro climate change including in rainfall, temperature and air humidity in Gambung Tea Plantation. In the dry season 2015, Gambung experienced four dry months that affect attack intensity of Empoasca and disease intensity of Blister Blight. This study aimed to determine the relationship between micro climate parameters and attack intensity of Empoasca and disease intensity of Blister Bright. Micro climate observation data were taken from Davis Automatic Weather Station (AWS) including rainfall intensity (mm), relative humidity (%) and maxium air temperature (0C). Attack intensity of Empoasca sp and Blister Bligh were observed by counting the number of healthy P+3 shoots as well as infected shoot from 200-500 gram of wet shoot sample randomly taken from container net at the plucking time. The results showed that the intensity of Empoasca decreased from 16.49% to 12.90% in the dry months from July to October 2015. The disease intensity of Blister Blight only occurred in July. There was a polynomial relationship among rainfall, temperature and humidity to the attack intensity of Empoasca with R2 values of 0.71, 0.77, 0.87, respectively the decrease of attack intensity occurred at ranfall intensity >140 mm, temperature >28°C and humidity >80%. Meanwhile linear relationship occurred among rainfall, temperature and humidity to the disease intensity of Blister Blight with R2 values of 0,98; 0,64; and 0,77, respectively the increasing of rainfall and humidity caused the increasing of disease intensity of Blister Blight. However disease intensity of Blister Blight decreased with increase in ambient temperature.

The study of transparent soap making from virgin coconut oil-based with the addition of white tea extract as an active ingredients

Widyasanti, Asri, Hasna, Anditya Husnul

Jurnal Penelitian Teh dan Kina Vol 19, No 2 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Transparent soap was made using high quality materials that beneficial for skin health and beauty. The main ingredient of the transparent soap was virgin coconut oil (VCO), with the addition of white tea extract which was able to increase the benefits of transparent soap. This study aimed to create formulation of the transparent soap, to find the addition of the white tea extracts to produce transparent soap and to study the characteristics of the transparent soap after the addition of white tea extracts. The treatments in this study were the addition of white tea extracts A = 0% (w / w), B = 0.5% (w / w, C = 1.0% (w / w and D = 1.5% (w / w). Observations on the transparent soap were including chemical properties, physical properties of soap, antibacterial and organoleptic test. The results of the analysis showed that all transparent soap formulas met the requirements of solid soap SNI 06-3532-1994, except for the total fatty acid. The formula of transparent soap with treatment B (addition of white tea extract 0.5% w / v) was the best product with organoleptic test results reached 43.34%. The analysis results of those soap were 11.47% of water content and evaporating substances, 37.97% of total fatty acid, 0.519% of free fatty acid, 2.24% of unsaponified fraction, pH value of 9, hardness 0.0077 mm/g/sec, the foam stability of 76.88% and the activity of antibacterial inhibition diameter of 10.7 mm, respectively. This technology could be applied in the production of transparent soap with the addition of white tea extract and to be developed into some industrial scale.

The effect of climate change on rainfall pattern and deficit of water in tea plantation

Dalimoenthe, Salwa Lubnan, Apriana, Y, June, T

Jurnal Penelitian Teh dan Kina Vol 19, No 2 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Climate change has been influencing rainfall pattern so that it would be necessary to see the impact of that changed on tea plantation. The experimental area coverage lowland (600 m asl), midland (800-1000m asl) and highland (>1.000 m asl) tea plantation and each altituted represented by three tea estate in West Java. The rainfall data collected since 2005 up to 2014 from each estate and water deficit has been count through the method develop by Wijaya (1996). The results showed that the rainfall pattern has been changed by La-Nina and El-Nino during 2005-2014 in tea estate either in lowland, midland or highland in the last decade. The climate change caused  rainfall decreasing and increasing on dry month (the rainfall < 100 mm). Eventhough on 2009 there is an significantly increasing of the rainfall but after 2009 until 2014, the rainfall tend to decrease. After El-Nino on late 2009 and early 2010, lowland tea estate on Subang Regency facing water deficit until 5 months with R (defisit water index) far below 1 even there is no El Nino. The tea plantation at midland area (Cianjur Regency) facing 5 months water deficit per year, but the R index close to 1. While in highland tea plantation (Bandung Regency), the water deficit only happend on certain month on certain year although there is a month with zero rainfall. Water deficit could be happend because of runoff on soil surface stimulate by low ability of soil to keep the water.

Antibacteririal avtivities of Bacillus cereus and Shigella dysenteriae of white tea extract in several variation of solvents

Widyasanti, Asri, Priantiwi, Andita Mega, Rohdiana, Dadan

Jurnal Penelitian Teh dan Kina Vol 19, No 1 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Tea is used in the food, cosmetic, and herbal drug industries. White tea is a kind of tea containing a relatively high polyphenol content compared to other kind of tea, and thus has the potential of being used as a natural antibacterial. The objective of this research was to study the antibacterial activity of of  white tea extract in several variation of  13 % (w/v) concentration of solvents to the activity of gram-positive bacteria (Bacillus cereus) and Gram-negative bacteria (Shigella dysenteriae). Laboratorium experimental method was used in this descriptive study. The antibacterial activity study was comprised of estimating inhibition area and total of bacterial growth. The results revealed that white tea extract inhibited bacterial growth, indicating that white tea extract from the n-hexane, ethyl acetate and 96% ethanol solvents could be developed as an antibacterial material. The diameter of the inhibition area to Bacillus cereus bacteria for n - hexane , ethyl acetate, and  ethanol 13 % (w/ v)  solvents were 0.6 mm, 10.5 mm and 1.75 mm, respectively; while for Shigella dysenteriae bacteria were 0,5 mm, 9,86 mm  and 10,6 mm, respectively. The total growth of Bacillus cereus bacteria for n-hexane, ethyl acetate, and ethanol 13 % (w/v) solvent were 1.3 x 107, 6.0 x 106, and  1.1 x 104 CFU / ml , and of Shigella dysenteriae bacteria were  1.0 x 107,  6.5 x 106 and 4.6 x 106 CFU / ml, respectively.

Sustainability Implication of the Lestari Tea Certification Program Implementation on the Tea Small Holder at Campaka Subdistrict Cianjur

Hutagalung, Tulus Bangun

Jurnal Penelitian Teh dan Kina Vol 19, No 1 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

In order to increase the income of tea smallholder and maintain the sustainability of tea, Dewan Teh Indonesia collaborated with Business Watch Indonesia in establishing a local certification scheme that is called as Lestari Tea Certification Program. This certification program has been conducted at some areas since 2011 until 2013 and one of the areas was Campaka sub-district, Cianjur. This research aimed at analysing the sus­tainability impact of the certification program by questionnaire and interview data collection. Analysing sustainability is conducted by using Mann-Whitney test by comparing the per­ception of the tea farmers who participated and those who didn’t participate on the certification program. Independent sample t test is also used to test the differentiation of the mean the income and transportation vehicle and com­munication asset between member of Tea Lestari Certification Program and those who are not. Moreover, logistic regression is used to know which variable more influence the probability for the tea farmers to join the certification program. The output of Mann-Whitney test shows that there is significant difference on the aspect of environment, economy, and social between tea farmers that participated and those who didn’t participate on the certification program. Logistic reg­ression output shows that education level, size of plantation land, and location of village influence the probability of the tea farmers whether to join or not join the Lestari Tea Cerfication Program.

Optimization and characterization of green tea polyphenol extract from various solvents

Shabri, Shabri, Rohdiana, Dadan

Jurnal Penelitian Teh dan Kina Vol 19, No 1 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Tea has a high content of polyphenols with potent antioxidant activity and beneficial for health. Availability of polyphenols extract is still very limited. The aim of this study to optimation and characterization of green tea polyphenol extract base on some solvents. Parameters analyzed were polyphenol content and yield of some extraction process conditions. This result showed that extraction by the ratio of tea and solvent was 1 : 15 b/v, extracted by acetone 70% solution in temperature 600C for 15 minutes obtain polyphenol content of 53,30% b/b and total yield of 40,17% b/b.

Portfolio business to self-financing of research institution (Case study: Research Institute for Tea and Cinchona)

Bestari, Srihadiyati Ayu, Firdaus, M, Suprihatini, Rohayati, Andati, Trias

Jurnal Penelitian Teh dan Kina Vol 19, No 1 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

Case of business portfolio for self financing of  Indonesia Research Institute for Tea and Cinchona is very interesting to study. In general, the research institute of tea in tea producing countries in the world receive finan­cing from the funds cess or levy or Government Budget. In PPTK, is a very rare case because the status of PPTK is a corporate. The unit of research and development as a cost center to produce innovations to increase the compe­titiveness of national commodity tea as well as Cinchona, should be financed from the portfolio business unit. Therefore, portfolio business strategies are needed in order to play optimally the role of  PPTK accordance with its mandate. The method used to determine the position of corporate is SWOT analysis especially  method to the value of  IFE and EFE. Furthermore, to determine the position and strategize potfolio business units use Boston Consulting Group (BCG) matrix. The results showed that the value of its IFE and EFE (-0.14; 0.11) is in quadrant II that  position of stability/ratio­nalization, which led to the Selective Main­tenance Strategy. BCG matrix of the mapping results, the majority of the business portfolio in PPTK be in the Quetion Mark. One business unit shoul be divested is Stevia estate due to its position of the Dog business group. Meanwhile, the business unit of  Cash Cow group are unit of garden and black tea factory and tea experiment garden of Simalungun. In order to better self financing of PPTK, several business units in the group of Question Mark with specific strategies should be push to move into the star groups, namely (1) unit of superior plant material production of tea and cinchona; (2) unit of garden and green tea factory; (3) laboratory services and expertise; and (4) unit of production of white tea and tea packaging.

Potency of tea plant indigenous microbe on plant growth and to against blister blight disease (Exobasidium vexans Massee)

Fauziah, Fani, Setiawati, Mieke Rochimi, Susilowati, Dwi Ningsih, Pranoto, Eko, Rachmiati, Yati

Jurnal Penelitian Teh dan Kina Vol 19, No 1 (2016)
Publisher : Research Institute for Tea and Cinchona

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Abstract

The chemical control method of blister blight (Exobasidium vexans Massee) on tea could inflict various negative impacts. In order to obtain an environmentally sound control method of blister blight disease, a nursery trial has been conducted to know the effectiveness of bacterial combinations. The trial was carried out at Gambung experimental garden, with seven treatments and four replications. The indigenous microbial codes are Azoto II-1, Endo-5 and Endo-76. The treatments tested comprised: control (without bacteria),  Azoto II-1 25% + Endo-5 75%; Azoto II-1 50% + Endo-5 50%; Azoto II-1 75% + Endo-5 25%;  Azoto II-1 25% + Endo-76 75%; Azoto II-1 50% + Endo-76 50%; and Azoto II-1 75% + Endo-76 25%. All of the treatments was applied as a soil drench, 50 ml/plant with bacterial concentration at 0,5%. The parameter observed was blister blight disease intensity, plant heights, stem diameter, leaves number, root length, and root volume. The results showed that the combination of Azoto II-1 75% + Endo-5 25% could suppress the intensity of blister blight disease with disease intensity 1.27%. The treatments also affected plant heights, stem diameter, leaves number, root length, and root volume, 15.32 cm; 3.38 cm; 8.05 cm; 18.25 cm and 2.37 cm, respectively.