High humidity air-impingement blanching (HHAIB) improves drying characteristics and quality of ground-cover chrysanthemum heads

2020 ◽  
Vol 16 (12) ◽  
Author(s):  
Jian-Wu Dai ◽  
Jie Wang ◽  
Sheng-Lin Yang ◽  
Meng-Da Wen ◽  
Peng-Fei Yin ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Ground Cover ◽  
Control Group ◽  
Total Flavonoids ◽  
High Humidity ◽  
Drying Time ◽  
Drying Kinetic ◽  
Air Impingement ◽  
Total Flavonoids Content

AbstractEffects of high humidity air-impingement blanching (HHAIB) temperature, relative humidity over a range of application time and drying temperature on air-impingement drying kinetics, colour attributes, browning index, blanching weight loss and total flavonoids content of chrysanthemum heads were studied. HHAIB could shorten the drying time of chrysanthemum heads significantly (p < 0.05) by up to 52% compared to the control group without blanching. Meanwhile blanching humidity has a greater influence on drying kinetic than other blanching parameters. Deff values of samples declined first and rose later with the growth of blanching humidity, while increased continuously with the growth of blanching temperature. The highest growth of total flavonoids content can be up to 21.6% under the HHAIB blanching conditions (110 °C of blanching temperature, 45% of relative humidity, 150 s of blanching time) in comparison with the control group. Lightness of all blanched samples was lower than the control group, and redness and total colour difference under different blanching conditions showed significant differences compared to the control group, while no obvious variation was observed in terms of yellowness values.

scholarly journals DRYING STUDY OF EUCALYTPTUS STAIGERIANA LEAVES BY MONITORING THE HUMIDITY OF THE DRYER DISCHARGE

2005 ◽  
Vol 4 (1) ◽  
Author(s):  
N. P. Braga ◽  
A. Starquit ◽  
M. A. Cremasco ◽  
J. O. Brito
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Light Phase ◽  
Drying Time ◽  
Humidity Transducer ◽  
Drying Kinetic ◽  
Heavy Phase ◽  
Simultaneous Heat ◽  
Analytical Scale ◽  
Air Humidification

The drying phenomenon can be treated as simultaneous heat and mass transfer in both the light and heavy phases. In the present case, the phenomenon’s evolution is normally observed through the heating of and moisture removal from the heavy phase. On the other hand, while the material is heating, the light phase is cooling and humidifying. The goal of the present work is to present discharge air humidification curves as a function of the drying time for Eucalyptus staigeriana leaves drying experiments. For the air humidification measurements, a dry bulb thermocouple and relative humidity transducer were installed at both the dryer inlet and outlet. The dryer was linked to a data acquisition system, which recorded the dry bulb temperature and the relative humidity with time. These data were later used to calculate the air moisture content at the dryer inlet and outlet. The data obtained by this methodology are compared with the ones from drying kinetic (moisture content removing of the heavy phase along time), acquired by the evolution of wet material weight through the use of an analytical scale.

Effect of high-humidity hot air impingement blanching (HHAIB) on drying and quality of red pepper (Capsicum annuum L.)

2017 ◽  
Vol 220 ◽  
pp. 145-152 ◽  
Author(s):  
Jun Wang ◽  
Xiao-Ming Fang ◽  
A.S. Mujumdar ◽  
Jing-Ya Qian ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Capsicum Annuum ◽  
Red Pepper ◽  
High Humidity ◽  
Capsicum Annuum L ◽  
Hot Air ◽  
Air Impingement

Effect of high-humidity hot air impingement blanching (HHAIB) and drying parameters on drying characteristics and quality of broccoli florets

2019 ◽  
Vol 37 (10) ◽  
pp. 1251-1264 ◽  
Author(s):  
Zi-Liang Liu ◽  
Jun-Wen Bai ◽  
Wen-Xia Yang ◽  
Jun Wang ◽  
Li-Zhen Deng ◽  
...  
Keyword(s):  
High Humidity ◽  
Drying Characteristics ◽  
Hot Air ◽  
Air Impingement

scholarly journals Painting for Aircraft

Proceedings ◽  
2020 ◽  
Vol 39 (1) ◽  
pp. 21
Author(s):  
Prapan ◽  
Sukantarat ◽  
Maneephrom
Keyword(s):  
Relative Humidity ◽  
Technical Specification ◽  
Effect Factors ◽  
Drying Time ◽  
Preparation Methods ◽  
Solvent Quality ◽  
Quality Study ◽  
Applied Coating ◽  
Painting Study

Objective This research is aimed to reduce time for the aircraft painting processes and decrease the budget for the painting activities which will not affect to the life limit of the painting and will not affect to the aerodynamic of the aircraft. method The research will be conducted by setting up the experiments to study the aircraft surface painting preparation methods, in order to find the better method of aircraft painting study the technical specification of the aircraft coating in associate with the viscosity of painting, air temperature for painting, relative humidity, drying time, lifetime period, hardness and difference, interval of time between painting and mixing solvent quality study the tools that use for painting such as air spray, airless spray, roller and brush study for error checking methods for understanding the painting defects result Reduce the errors that might occur during the aircraft painting processes which will lead to the budget decreasing and time reducing for aircraft painting conclusion To obtain the good quality of painting, it is very important to realize the specification of applied coating, working processes and painting equipment that associate with the maintenance manual of each aircraft, the effect factors that take into account of the painting and the technique of painting that is used.

Moisture Transport Mechanism and Drying Kinetic of Fresh Harvested Red Onion Bulbs under Dehumidified Air

2017 ◽  
Vol 13 (9) ◽  
Author(s):  
Nurul Asiah ◽  
Mohamad Djaeni ◽  
Ching Lik Hii
Keyword(s):  
Relative Humidity ◽  
Storage Time ◽  
Moisture Diffusion ◽  
Moisture Diffusivity ◽  
Transfer Model ◽  
Unsteady State ◽  
Mass Transfer Model ◽  
Drying Time ◽  
Onion Bulbs ◽  
Drying Kinetic

AbstractDrying plays an important role in post-harvest handling of onion for prolonging storage time. This research focuses on the drying studies of red onion bulbs using dehumidified air. The works were carried out by observing the microscopic structure of red onion bulbs layer and followed by developing mass transfer model for moisture diffusion during drying. Moisture diffusivity was estimated from drying experiments conducted at various temperatures (40, 50 and 60 °C) using the unsteady state solutions of Fick’s second law model. The diffusivity values were used to predict the drying kinetics as well as effective drying time for different air relative humidity. Results showed that combination of low relative humidity and low drying temperature significantly improved drying rate and reduced drying time.

scholarly journals Production and Quality of Physalis ixocarpa Brot. Fruit under Colored Shade Netting

HortScience ◽  
2018 ◽  
Vol 53 (6) ◽  
pp. 823-828
Author(s):  
Isidro Morales ◽  
Gabino Alberto Martínez-Gutiérrez ◽  
Cirenio Escamirosa-Tinoco ◽  
Cinthia Nájera ◽  
Tatiana Pagan Loeiro da Cunha-Chiamolera ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Stem Diameter ◽  
Soluble Solids ◽  
Control Group ◽  
Total Soluble Solids ◽  
Light Spectra ◽  
Growth Production ◽  
Weight Number ◽  
Number Of Branches

The use of colored shade nets is a method to protect plants from direct solar radiation and optimize the light spectra they transmit. The purpose of this work was to evaluate the photosynthetically active radiation (PAR), the photosynthetically active integrated radiation (IPAR), temperature, relative humidity, growth, production, and fruit quality of Physalis ixocarpa variety Tecozautla, cultivated under nets generating 60% shade in the colors beige, blue, green, red, and black and under a treatment without netting (control group). Different variables were observed: climatic variables, such as radiation, temperature, and relative humidity; growth variables, such as plant height and stem diameter; production variables, such as number, weight, and caliber of the fruit; and quality variables of the fruit, such as pH and total soluble solids. The highest PAR, IPAR, and temperature and lowest relative humidity were obtained in the absence of netting. The white net resulted in the highest PAR and IPAR but no difference in temperature or relative humidity. In addition, an increase in the height, stem diameter, number of branches, and weight, number, and size of the fruit was observed. The white net resulted in the highest yield: 88% higher than in the control group. The pH of the fruit was significantly higher under the white netting, and no differences among the treatments in terms of the content of total soluble solids were found.

scholarly journals EVALUATION OF ANTIOXIDANT AND ANTIFUNGAL PROPERTIES OF PALU SHALLOT (Allium ascalonicum L VAR. Aggregatum)

2021 ◽  
Vol 9 (Spl-2-ICOPMES_2020) ◽  
pp. S215-S221
Author(s):  
Muhammad Sulaiman Zubair ◽  
◽  
Agustinus Widodo ◽  
Mira Fatmasari ◽  
Febriana De’e ◽  
...  
Keyword(s):  
High Performance ◽  
Total Phenolics ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Ethanolic Extract ◽  
Total Flavonoids ◽  
Total Flavonoids Content ◽  
Quercetin Concentration

Shallot is one of the typical plants at Palu, Central Sulawesi, Indonesia, famous by local people as fried Shallot. It is used as a cooking spice and traditional medicine for treating various diseases. This study was carried out to assess the phytochemical constituent including total phenolics, total flavonoids, and quercetin content of the Palu shallot (Allium ascalonicum L var. aggregatum), and to determine the antifungal and antioxidant properties of this plant ethanolic extract. Total phenolics/ flavonoids and quercetin concentration were determined by spectrophotometry UV-Vis and Reverse Phase - High-Performance Liquid Chromatography (RP-HPLC) methods. Antifungal activity and antioxidant capacity of the ethanolic extract was assayed by using diffusion agar and 2,2-diphenyl-1-picrylhydrazyl (DPPH) methods. Results of the study revealed that the total flavonoids content of the ethanolic extract was 0.3634 ± 0.018 mg QE/100 mg while total phenolics content was 0.4834 ± 0.003 mg GAE/100 mg. Meanwhile, the quercetin content was 65.46±0.0002 mg/kg. Further, ethanolic extract of Palu shallot also showed the radical scavenging activity with IC50 of 0.1398 mg/mL and growth inhibition on Candida albicans with inhibitory zone diameter range from 7.57 to 16.51 mm. This study confirms the high quality of Palu shallot as it has high total flavonoids, represented by the high quercetin concentration, and it is proposed to be a source for an antioxidant and antifungal medicinal herb.

scholarly journals DRYING STUDY OF EUCALYTPTUS STAIGERIANA LEAVES BY MONITORING THE HUMIDITY OF THE DRYER DISCHARGE

2005 ◽  
Vol 4 (1) ◽  
pp. 13
Author(s):  
N. P. Braga ◽  
A. Starquit ◽  
M. A. Cremasco ◽  
J. O. Brito
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Light Phase ◽  
Drying Time ◽  
Humidity Transducer ◽  
Drying Kinetic ◽  
Heavy Phase ◽  
Simultaneous Heat ◽  
Analytical Scale ◽  
Air Humidification

The drying phenomenon can be treated as simultaneous heat and mass transfer in both the light and heavy phases. In the present case, the phenomenon’s evolution is normally observed through the heating of and moisture removal from the heavy phase. On the other hand, while the material is heating, the light phase is cooling and humidifying. The goal of the present work is to present discharge air humidification curves as a function of the drying time for Eucalyptus staigeriana leaves drying experiments. For the air humidification measurements, a dry bulb thermocouple and relative humidity transducer were installed at both the dryer inlet and outlet. The dryer was linked to a data acquisition system, which recorded the dry bulb temperature and the relative humidity with time. These data were later used to calculate the air moisture content at the dryer inlet and outlet. The data obtained by this methodology are compared with the ones from drying kinetic (moisture content removing of the heavy phase along time), acquired by the evolution of wet material weight through the use of an analytical scale.

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