scholarly journals ANALISA PENGERING IKAN AIR TAWAR DENGAN MENGGUNAKAN SISTEM HYBRID KOLEKTOR SURYA TIPE RAK DENGAN SOLAR CELL

INFO-TEKNIK ◽  
2018 ◽  
Vol 19 (2) ◽  
pp. 211
Author(s):  
Jainal Arifin ◽  
Muhammad Marsudi
Keyword(s):  
Solar Cell ◽  
Water Content ◽  
Solar Power ◽  
Biochemical Change ◽  
Drying Rate ◽  
The Sun ◽  
Local Resident ◽  
Testing Sample ◽  
Wet Weight ◽  
Large Distribution

In South Kalimantan precisely in regency of Hulu Sungai Selatan Amuntai, itis one of the dry fish manufacturing of regency in South Kalimantan. The process ofdrying fish is still doing by traditionally where the fish are drying by utilizing theenergy of the sun directy. The main problem that arise in unfavorable of dryingprocess is a decrease in quality such as a large distribution of water content, thedamage that caused by fungus or biochemical change that unwanted. If thedistribution of heat and air is uneven or uniform, the drying rate of the material willalso be uneven.The method of research was conducted by several stage, first prepare the testequipment, namely fish dryer that has been designed in such a way based on theresult of calculation and then put in the test location and the collector is directed tothe sun and for testing sample by using freshwater fish, sepat fish and haruan fishobtained from the result of local resident, as a measure of temperature in the dryingchamber is using a thermometer to know the temperature in the fish dryer.Based on the data of analysis and discussion, can be taken the conclusionabout fish dryer that is the distribution of the drying rate in the each rack havevariation according to the temperature of the each rack. The result of drying the sepatfish for 7 hours by using solar power dryer were able to reduce the weight of sepatfish from 500 g to 200 g and the wet weight of haruan fish from 500 g to 200 g. Thetotal efficiency of solar power dryer is 79.768%

scholarly journals Effects of different drying rates on the physiological quality of Coffea canephora Pierre seeds

2005 ◽  
Vol 17 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Sttela Dellyzete Veiga Franco da Rosa ◽  
Delacyr da Silva Brandão Júnior ◽  
Édila Vilela de Resende Von Pinho ◽  
André Delly Veiga ◽  
Luiz Hildebrando de Castro e Silva
Keyword(s):  
Water Content ◽  
Storage Temperature ◽  
Removal Rate ◽  
Coffea Canephora ◽  
Development Stage ◽  
Seed Vigor ◽  
Drying Rate ◽  
Physiological Quality ◽  
Drying Rates

Desiccation tolerance in seeds depends on the species, development stage and drying conditions, especially the water removal rate. Coffea seeds are considered of intermediate performance, because they tolerate relative dehydration compared to orthodox seeds and are sensitive to low temperatures. The objective of this study was to verify the effect of different drying rates on the viability and storability of Coffea canephora seeds. A complete randomized experimental design was used, in a factorial 3 x 5 x 2 design, with three drying rates (fast, intermediate and slow), five final mean water contents after drying (51, 42, 33, 22 and 15 %) and two storage temperatures (10 and 20°C). The germination and seed vigor assessments, using radicle protrusion, cotyledon leaf opening, seedling emergence and emergence speed index, were performed shortly after drying and after two and four months storage. It was observed that with reduction in the water content there was reduction in the germination values and seed vigor, for all the drying rates. The greatest reductions in physiological quality occurred when the seeds were dried quickly and the best results were obtained at the intermediate drying rate. There was an effect of drying rate and storage temperature on the physiological quality of the seeds, and lower germination and vigor values were observed in seeds with lower water content stored at 20°C. C. canephora seeds were tolerant to desiccation down to 15 % water content and can be stored for four months at 10°C. A temperature of 20ºC can be used to store C. canephora seeds, as long as the water content is not reduced to values below 22 % water content.

Dehydration of seabird prey during transport to the colony: effects on wet weight energy densities

1987 ◽  
Vol 65 (11) ◽  
pp. 2822-2824 ◽  
Author(s):  
W. A. Montevecchi ◽  
J. F. Piatt
Keyword(s):  
Water Content ◽  
Dry Weight ◽  
Data Sets ◽  
Fresh Weight ◽  
Present Evidence ◽  
Wet Weight ◽  
Cautious Interpretation ◽  
Existing Data

We present evidence to indicate that dehydration of prey transported by seabirds from capture sites at sea to chicks at colonies inflates estimates of wet weight energy densities. These findings and a comparison of wet and dry weight energy densities reported in the literature emphasize the importance of (i) accurate measurement of the fresh weight and water content of prey, (ii) use of dry weight energy densities in comparisons among species, seasons, and regions, and (iii) cautious interpretation and extrapolation of existing data sets.

Effects of exposure on water relations and photosynthesis of western hemlock in habitat forms

1976 ◽  
Vol 6 (1) ◽  
pp. 40-48 ◽  
Author(s):  
R. A. Keller ◽  
E. B. Tregunna
Keyword(s):  
Light Intensity ◽  
Water Content ◽  
Water Vapour ◽  
Western Hemlock ◽  
Diffusion Resistance ◽  
The Sun ◽  
Evaporative Demand ◽  
Photosynthetic Rates ◽  
Water Vapour Diffusion ◽  
Vapour Diffusion

Measurements of relative turgidity, transpiration rates, and photosynthetic rates on sun-grown and shade-grown western hemlock (Tsugaheterophylla (Raf.) Sarg.) were used to indicate effects of varying degrees of exposure.The sun-adapted form had low photosynthetic rates but maintained its water content under conditions of high evaporative demand. The shade-adapted form desiccated under exposed conditions, and in contrast with the sun-adapted form, its water vapour diffusion resistance decreased with increasing light intensity.

Effects of differential drying rates on viability retention of recalcitrant seeds of Ekebergia capensis

1998 ◽  
Vol 8 (4) ◽  
pp. 463-471 ◽  
Author(s):  
N. W. Pammenter ◽  
Valerie Greggains ◽  
J. I. Kioko ◽  
J. Wesley-Smith ◽  
Patricia Berjak ◽  
...  
Keyword(s):  
Water Content ◽  
Exponential Function ◽  
Time Course ◽  
Drying Rate ◽  
Recalcitrant Seeds ◽  
Tissue Water ◽  
Initial Water ◽  
Viability Loss ◽  
Drying Rates ◽  
Water Contents

AbstractThe drying rate of whole seeds of Ekebergia capensis (Meliaceae) was shown to influence the response to desiccation, with rapidly dried seeds surviving to lower water contents. Short-term rapid drying (to water contents higher than those leading to viability loss) actually increased the rate of germination. The form of the time course of decline of axis water content varied with drying rate; slow drying could be described by an exponential function, whereas with rapid drying initial water loss was faster than predicted by an exponential function. These observations suggest that slow drying brought about homogeneous dehydration and that the rapid drying was uneven across the tissue. This raised the possibility that the different responses to dehydration were a function of different distributions of water in the axis tissue under the two drying regimes. However, ultrastructural observations indicated that different deleterious processes may be occurring under the different drying treatments. It was tentatively concluded that a major cause of viability loss in slowly dried material was likely to be a consequence of aqueous-based processes leading to considerable membrane degradation. Uneven distribution of tissue water could not be rejected as a contributory cause of the survival of rapidly dried seeds to low bulk water contents. The differential response to dehydration at different drying rates implies that it is not possible to determine a ‘critical water content’ for viability loss by recalcitrant seeds.

scholarly journals Standardisasi Parameter Spesifik dan Non Spesifik Ekstrak Etanol Buah Asam Gelugur (GarciniaAatroviridis Griff.)

2019 ◽  
Vol 11 (02) ◽  
pp. 16-26
Author(s):  
Galih Samodra
Keyword(s):  
Body Weight ◽  
Traditional Medicine ◽  
Water Content ◽  
Antioxidant Properties ◽  
Ethanol Extract ◽  
Ash Content ◽  
Drying Rate ◽  
Reduce Body Weight ◽  
Specific Parameter

Acid gelugur fruit (Garcinia atroviridis) is one of the Garcinia families that has long been used as traditional medicine. Gelugur acid has been widely used as a cooking spice by Malay people, but it also has the ability to reduce cholesterol. Besides that, it has antioxidant properties and can reduce body weight and cholesterol. The purpose of this study was to establish specific parameter standards and non-specific parameters from the ethanol extract of acid gelugur fruit. The extract was obtained by maceration method using 70% ethanol with a rendament of 37.15%. Specific parameters include observations of organoleptic extracts of tamarind fruit showed, dark brown, distinctive smelling, and sour. Contains several sekendur metabolites such as flavonoids and saponins. The level of the compound that is soluble in water is 3.6%, while the content of the compound dissolved in ethanol is 3.9%. Total ash content of 2.99%. Non-specific parameters include acid insoluble ash content of 1.03%. The drying rate of geluguric acid simplicia was 7.20%. Water content of sour fruit gelugur extract was 13%.  

scholarly journals EFFECT OF TEMPERATURE, HUMIDITY AND IRRADIANCE ON SOLAR POWER GENERATION

2021 ◽  
Vol 26 (4) ◽  
pp. 113-119
Author(s):  
FRANK ONAIFO ◽  
AKPOFURE ALEXANDER OKANDEJI ◽  
OLAMIDE AJETUNMOBI ◽  
DAVID BALOGUN
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Solar Cell ◽  
Solar Radiation ◽  
Solar Irradiance ◽  
Solar Power ◽  
Corrosion Process ◽  
Effect Of Temperature ◽  
Photovoltaic Solar Cell ◽  
Solar Power Generation

This paper studies the effect of temperature, humidity and irradiance on the power generated by a photovoltaic solar cell. This was achieved using pyranometer for determining the solar radiation, wet and dry thermometer for measuring humidity, and digital multimeter for voltage and current measurement. The result of the study show that power generation increases with increase of solar irradiance. Additionally, changes of humidity level and temperature do not significantly affect solar power generation. Furthermore, it was also observed that high temperatures and higher humidity levels accelerate the corrosion process on the solar cells which reduces the efficiency of the cells.

scholarly journals VENTURY TYPE MICRO-BUBBLE GENERATOR (MBG) DESIGN USING 50 WP SOLAR POWER PANEL

Barometer ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 368-375
Author(s):  
Aab Arohman ◽  
Kardiman Kardiman ◽  
Oleh Oleh
Keyword(s):  
Solar Cell ◽  
Solar Power ◽  
Micro Bubble

Peningkatan kualitas pertumbuhan ikan untuk sekarang ini bisa direncakan oleh peternak ikan dengan cara membuat suatu alat yaitu Micro Bublbe yang berfungsi untuk membuat permukaan air bergelombang sehingga ikan bisa bergerak lebih cepat yang mengakibatkan pertumbuhan ikan lebih baik. Micro bubbles dapat mengisolasi pengaruh lingkungan yang buruk terhadap pemeliharaan ikan dengan sistem yang baik. Tujuan dari penelitian ini yaitu melakukan pembaharuan alat micro bubble generator (MBG) dengan mengaplikasikan panel surya pada perancangan. Alat yang dirancang menggunakan solar cell sebagai alat untuk menghasilkan daya listrik yang disimpan kedalam baterai. Kapasitas bateri yang digunakan sebesar 60 watt dengan menggunakan solar cell 50 wp. Daya pada solar cell didapat dari hasil perhitungan dan pengujian menghasilkan efisiensi sebesar 5,89 %.

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