scholarly journals Studies to Establish the Rational Way to Pluck the Tea Plant in Cold Locality. : 1 On some causes of the decline in yield and manufacturing quality of tea leaf brought about by plucking by shears.

1961 ◽  
Vol 29 (4) ◽  
pp. 425-427 ◽  
Author(s):  
Yasumoto FUCHINOUE ◽  
Hiroko FUCHINOUE ◽  
Tetsuzo MARUYAMA
Keyword(s):  
Tea Plant ◽  
Manufacturing Quality ◽  
Tea Leaf

scholarly journals Research on the Manufacturing Quality of Co-Cured Hat-Stiffened Composite Structure

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2747
Author(s):  
Xiangwen Ju ◽  
Jun Xiao ◽  
Dongli Wang ◽  
Cong Zhao ◽  
Xianfeng Wang
Keyword(s):  
Composite Structures ◽  
Sound Pressure ◽  
Integration Method ◽  
Complex Geometry ◽  
Sound Field ◽  
Thickness Measurement ◽  
Curing Process ◽  
The Finite Element Method ◽  
Manufacturing Quality

The stringer-stiffened structure is widely used due to its excellent mechanical properties. Improving the manufacturing quality of stringer-stiffened structure which have complex geometry is important to ensure the bearing capacity of aviation components. Herein, composite hat-stiffened composite structures were manufactured by different filling forms and bladders with various properties, the deformation of silicone rubber bladder in co-curing process was studied by using the finite element method. The thickness measurement at different positions of the hat-stiffened structure was performed to determine the best filling form and bladder property. Moreover, in view of the detection difficulties in R-zone of stringer, numerical simulation was performed to get the sound pressure and impulse response of at the R-zone of stringer by Rayleigh integration method, and an effective equipment which could stably detect the manufacturing quality of R-zone was designed to verify the correctness of sound field simulation and realize the detection of stringer. With the optimum filling form and bladder properties, hat-stiffened composites can be manufactured integrally with improved surface quality and geometric accuracy, based on co-curing process.

scholarly journals CONTENT OF AMINO ACID COMPOSITION AND CHANGE OF TENANE IN TEA LEAF IN THE AZERBAIJAN REPUBLIC

2018 ◽  
pp. 75-82 ◽  
Author(s):  
Мухендис (Mukhendis) Мамедгусейин оглы (Mamedgusejin ogly) Джахангиров (Cahangirov) ◽  
Микаил (Mikail) Акпер оглы (Аkper ogly) Магеррамов (Маharrаmov)
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Main Part ◽  
Black Tea ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Leaf Processing ◽  
High Level ◽  
Tea Leaf

It was shown that the scent and taste of tea are determined by the level of protein and amino acid. Certainly, protoingens that make up most part of proteins are noted among amino acids. All of them are considered L-shaped. Green tea mostly consists of proteins. Even the high level protein doesn’t adversely impact the quality of tea yet that of black tea might be negatively influenced by that. Also, its taste will also be worsened by that.As a result of analysis 16 amino acids and 8 unsubstituted substance was found. The main part of amino acid is taken by teanin. It take 41.3% of Azerbaijan-1, 38.8% of Kolxida types respectively. In all stages of tea leaf processing the decrease of teanin and increase of glutamin is witnessed. Also, the loss of teanin happens during the purification (by 34%) and the fading stages.As a result of the work carried out, it has been found that the size of the tea leaf particle, the temperature and the extraction time influence the extraction of the theanine. The optimum are: the size of the tea leaf particle is 200–450 mkm, the extraction temperature is 80–85 °C, and the extraction time is 20–25 minutes.

scholarly journals A study of tea leaves drying using dehumidification process and regeneration of liquid desiccant in a closed-cycle dehumidification-humidification

2018 ◽  
Vol 159 ◽  
pp. 02025 ◽  
Author(s):  
Eflita Yohana ◽  
Mohammad Endy Yulianto ◽  
Shofwan Bahar ◽  
Azza Alifa Muhammad ◽  
Novi Laura Indrayani
Keyword(s):  
Absolute Humidity ◽  
Tea Plant ◽  
Regeneration Process ◽  
Drying Process ◽  
Liquid Desiccant ◽  
Tea Leaves ◽  
Saturation Point ◽  
Air Stream ◽  
Tea Plants ◽  
Tea Leaf

Tea plants in Indonesia are derived from Carmelia sinensis var. assamica which contain catechin in quite high amount compared with other countries tea plant. Green tea is made by inactivating the oxidase / phenolase enzyme that presents in the fresh tea leaf buds from tea garden, by using hot steam to prevent the oxidation of the catechins. Drying process to reduce the moisture of tea, one of the method is by utilizing the dry air from dehumidification process. Liquid desiccant made from 50% concentration of CaCl2, the temperature is lowered to 10 °C and sprayed into the air stream which contains water vapor by using a 0.2 mm spraying nozzle so that mass transfer and latent heat occur in the dehumidifier. The result of air dehumidification process used for drying tea leaves. The air is able to dry the tea leaves from the weight of 58 grams to 47 grams. Then the liquid desiccant dehumidification process will be streamed into the humidifier, where the liquid desiccant regeneration process will have change into the initial concentration. The result of air humidification process has an average absolute humidity rise of 0.07 g/kg. The liquid desiccant regeneration process that happened continuously reaching the saturation point at 280 minutes. It can be concluded that the process of dehumidification-humidification is a fairly effective method for drying the tea leaves.

Forecasting Manufacturing Quality and Optimizing Product Robustness Using Process Capability Data

Manufacturing ◽  
2003 ◽  
Author(s):  
Daniel Kern ◽  
Xiaoping Du ◽  
Agus Sudjianto
Keyword(s):  
Probabilistic Approach ◽  
Process Capability ◽  
Simulation Models ◽  
Design Parameters ◽  
Set Design ◽  
Manufacturing Quality ◽  
Design Engineers ◽  
Parameter Values ◽  
Manufacturing Variation

A company’s success is highly dependent on its ability to manufacture quality products. Designing products that can be manufactured to meet customer needs with an acceptable level of variation is challenging because design engineers are often unfamiliar with the company’s manufacturing capability or are unable to effectively use the capability data to improve a design. The authors present an approach to forecast the manufacturing quality of a product and optimize its robustness while it is being designed. The system comprises a database that stores process capability data and simulation models to simulate process capability data when actual, appropriate data are nonexistent. These data and tools are used with a new probabilistic approach through the inverse reliability strategy to optimize the robustness of a design by locating values of design parameters that enhance the performance of the design and are insensitive to manufacturing variation. Design engineers can use this approach to set design parameter values that will improve the functionality of the product while ensuring it can be produced with high capability. This approach is demonstrated with a design example of an engine valvetrain.

Potassium in tea (Camellia sinensis (L) O. Kuntze) cultivation from soil to cup quality - A review

2018 ◽  
Vol 38 (01) ◽  
Author(s):  
Anil Kumar Singh ◽  
Sunil Kumar Pathak
Keyword(s):  
Camellia Sinensis ◽  
Starch Synthesis ◽  
Water Relation ◽  
Vital Role ◽  
Tea Plant ◽  
Climatic Conditions ◽  
Enzyme Activation ◽  
Foliar Nutrition ◽  
Native Strains

Tea (Camellia sinensis (L) O. Kuntze) plants require comparatively higher quantity of potassium for production and quality of produce. After nitrogen, potassium is the second major nutrient for tea plant. Potassium plays vital role in enzyme activation, water relation, photosynthesis protein and starch synthesis. It offers abiotic as well as biotic stress toleration in tea plants and also improves biochemical parameters and organoleptic quality of tea. However, owing to the climatic conditions and soil mineralogical compositions, tea soils are predominantly poor in their potash content. Thus, the need based adequate supply of potash through inorganic or organic sources as soil application or foliar nutrition in tea growing soils of India is essential to realize the optimum economic yield with desired quality. Furthermore, the possibilities of development of potassium solubilizing biofertilizer with identification of native strains of microbes and development of potassium efficient tea genotype need to be explored. Such attempts minimize the cost of cultivation, sustain soil fertility and prevent environmental pollution.

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