نتایج جستجو برای: finish drying

تعداد نتایج: 31201  

Journal: :علوم باغبانی ایران 0
لیلا تبریزی استادیار، دانشجوی سابق کارشناسی ارشد و استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج فرناز دژابون استادیار، دانشجوی سابق کارشناسی ارشد و استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج یونس مستوفی استادیار، دانشجوی سابق کارشناسی ارشد و استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج مهدی مریدی فریمانی استادیار پژوهشکدۀ گیاهان و مواد اولیۀ دارویی، دانشگاه شهید بهشتی، تهران، ایران

with considering importance of post harvest operation on quality criteria of pot marigold (calendula offıcinalis l.), the effect of flower nutrient source (organic inputs such as cattle manure (25 t ha-1), municipal waste compost (20 t ha-1), spent mushroom compost (15 t ha-1), vermicompost (15 t ha-1) and control) as well as different drying methods including microwave (300, 600 and 900 w), ov...

2018
Pengcheng Nie Tao Dong Yong He Shupei Xiao Fangfang Qu

Soil nitrogen is one of the crucial components for plant growth. An accurate diagnosis based on soil nitrogen information is the premise of scientific fertilization in precision agriculture. Soil nitrogen content acquisition based on near-infrared (NIR) spectroscopy shows the significant advantages of high accuracy, real-time analysis, and convenience. However, soil texture, soil moisture conte...

2013

This paper describes an experimental investigation of the drying behavior and conditions of rosehip in a convective cyclone-type dryer. Drying experiments were conducted at air inlet temperatures of 50, 60 and 70 o C and air velocities of 0.5, 1 and 1.5 ms. The parametric values obtained from the experiments were fitted to the Newton mathematical models. Consequently, the drying model developed...

2009
Xu Duan Min Zhang Arun S. Mujumdar Shaojin Wang

Freeze drying (FD) yields the best quality of dried sea cucumber but at the cost of long drying time and also the overall cost. Air drying (AD) gives an unacceptably poor quality product. To achieve faster drying along with a high quality product a microwave freeze drying (MFD) technique was developed to dry sea cucumbers. The relationship between corona discharge and microwave power at various...

2013
E. Salleh

Application of tray dryer is widely used in agricultural drying because of its simple design and capability to dry products at high volume. However, the greatest drawback of the tray dryer is uneven drying because of poor airflow distribution in the drying chamber. Implementing the proper design of a tray dryer system may eliminate or reduce non-uniformity of drying and increases dryer efficien...

2012
Dengyu Chen Kai Li Xifeng Zhu

In this study, the effect of drying temperature, from 50 °C to 90 °C, on the drying characteristics of powdered peanut shell was investigated, and an isothermal procedure was used to determine the moisture diffusivity and the activation energy. All the experiments were performed using a thermogravimetric analyzer (TGA) for rapidly achieving the isothermal condition and accurately recording the ...

Journal: :علوم باغبانی ایران 0
سعیده محتشمی دانشجوی سابق کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران مصباح بابالار استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران سیدمحمد ابراهیم زاده موسوی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمدحسین میرجلیلی استادیار گروه کشاورزی پژوهشکده گیاهان و مواد اولیه دارویی دانشگاه شهید بهشتی جمانه ادیب دانشجوی سابق کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران

drying, is one of the important postharvest processes of medicinal plants with an important role played in quality and quantity of the drugs. in this research, in order to study the effect of growing conditions and different drying methods on drying time, essential oil content, color characteristics and microbial load of dracocephalum moldavica, a factorial experiment in randomized complete blo...

2016
P. Hoffman M. Pěnička

This paper presents an attempt to optimize fluidized bed drying of wet and adhesive particles (with an initial diameter of about 580 mm) with the use of stirring, and discusses the influence of stirring on the total drying time. The goal was to demonstrate the positive effect of stirring a fluidized bed to the drying time, to find the optimal parameters (stirrer design, speed, and size). Experi...

Journal: :journal of agricultural science and technology 2010
m. tahmasebi t. tavakkoli hashjin m. h. khoshtaghaza a. m. nikbakht

drying characteristics of quercus were determined experimentally as a function of temperature, air velocity, and variety (quercus persica and quercus libani). in order to estimate and select a suitable drying curve, five different thin layer drying models were fitted to the experimental data. experiments were performed at the air temperatures of 50, 60 and 70°c. at each temperature level, two a...

2007
Zhimin Lu

On farm walnut drying is often a major bottle neck during the start of walnut harvest. The recommended maximum drying air temperature for English walnuts is 110 of. This limit is based on tests by university personnel during the introduction of heated air drying (Batchelor, 1924) which demonstrated that long term exposure to temperatures higher that 110°F caused walnuts to turn rancid. This pro...

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