scholarly journals Effects of knife-incising and longitudinal kerfing pretreatments on high-temperature drying of red pine and pitch pine timbers

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8184-8196
Author(s):  
Chang Jin Lee ◽  
Chang-Deuk Eom
Keyword(s):  
High Temperature ◽  
Cross Sections ◽  
Red Pine ◽  
Drying Time ◽  
The Third ◽  
Commercial Use ◽  
As Species ◽  
Pitch Pine ◽  
Species Type ◽  
High Temperature Drying

Effects of knife-incising and longitudinal kerfing pretreatments were analyzed relative to the high-temperature drying of red pine and pitch pine timbers with cross-sections less than 15 cm. Specimens were prepared as round and square timbers with thicknesses of 9, 12, and 15 cm. They were divided into four groups: control, longitudinal kerf, knife-incised, and a combination of knife-incised and longitudinal kerf. Some results from this study, such as commercial availability and application methods of drying schedules, have immense commercial importance. The incising and kerfing treatment can be used not only to improve drying quality but also as a tool for deriving an optimal drying schedule. The kerfing treatment noticeably reduced the surface checks in square timber. However, the incising treatment caused a phenomenon in which the incisions connect to each other and develop into surface checks. The wood characteristics, such as species, type, thickness, and initial MC, had more influence on determining the drying defects than the pretreatments. For the commercial use of the drying schedule used in this study, it can be useful to determine the appropriate drying time in the third step according to the species, thickness, and shape.

scholarly journals Modifikasi Oven Biasa Menjadi Oven Vakuml

2020 ◽  
Vol 12 (2) ◽  
pp. 95-106
Author(s):  
Subandi Subandi
Keyword(s):  
High Temperature ◽  
Boiling Point ◽  
Atmospheric Conditions ◽  
Vacuum Oven ◽  
Drying Time ◽  
Food Ingredients ◽  
Suction Pump ◽  
Speed Up ◽  
Working Principle ◽  
High Temperature Drying

The limited quantity and types of facilities for practicum, independent business projects and research, both lecturer and student research, is a problem that often arises and requires solutions to overcome it, one way to overcome the problem of limitations in types of practicum facilities is to modify existing equipment so that it can be done. used for other functions in accordance with the demands of the development of student and lecturer research studies. Modification of an ordinary oven into a vacuum oven is a set of drying ovens that are coupled with a suction pump and equipped with a vacuum gauge to measure the level of vacuum. A vacuum oven is a drying device with a low temperature, with the working principle in a vacuum that the boiling point of moisture is lower than the boiling point in atmospheric conditions so as to speed up the drying time and reduce the amount of damaged nutrients in the dried material due to drying. This drying method is suitable for materials that have high temperature sensitivity or are volatile due to their short drying time, one of which is food ingredients. At high temperature drying, the vitamin content in food is easily degraded and damaged. The modified vacuum oven can be used to dry materials from the types of leaves, fruit and tubers that were thinned using a temperature of 60°C, a vacuum level of -0.5 atm for 2 hours.

High temperature drying characteristics of crushed rice for animal feed

2014 ◽  
Vol 7 (3) ◽  
pp. 133-138 ◽  
Author(s):  
Fumina Tanaka ◽  
Kotaro Yamashita ◽  
Ai Tanaka ◽  
Fumihiko Tanaka ◽  
Daisuke Hamanaka ◽  
...  
Keyword(s):  
High Temperature ◽  
Animal Feed ◽  
Drying Characteristics ◽  
High Temperature Drying

CHANGES IN MOISTURE, TEMPERATURE, AND QUALITY OF CORN SEED DURING HIGH-TEMPERATURE DRYING

1989 ◽  
Vol 69 (3) ◽  
pp. 749-761 ◽  
Author(s):  
ULRICH HERTER ◽  
JOSEPH S. BURRIS
Keyword(s):  
Seed Quality ◽  
Inbred Lines ◽  
Drying Time ◽  
Temperature Changes ◽  
Corn Seed ◽  
Seed Corn ◽  
Seed Moisture ◽  
The Relationship ◽  
High Temperature Drying

Mechanical drying has frequently caused injury in corn seed. Changes in seed moisture, temperature, and quality were determined for inbred lines A632, B73 and Mo17 to define the relationship between these variables. Ears harvested at ca. 48 and 38% seed moisture could be dried at 50 °C for 4–15 h and 18–24 h, respectively, before germination started to decline linearly with prolonged 50 °C drying. Drying time at 50 °C, seed moisture, or embryo moisture after 50 °C drying could be used equally well for prediction of seed quality. Seedling dry weights often declined even when seed was dried for only a few hours at 50 °C. Temperature measurements within seeds indicated that evaporation cooled the seed no more than 5 °C. Drying susceptibility of seed parents varied greatly between years.Key words: Moisture, temperature changes, seed corn, drying

Host choice, settling and folding leaf behaviors of the larval rice leaf folder under heat stress

2016 ◽  
Vol 106 (6) ◽  
pp. 809-817 ◽  
Author(s):  
M.A. Bodlah ◽  
A.-X. Zhu ◽  
X.-D. Liu
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Host Choice ◽  
Cnaphalocrocis Medinalis ◽  
Behavioral Traits ◽  
The Third ◽  
Rice Leaf ◽  
Rice Leaf Folder ◽  
Extreme High Temperature ◽  
Third Instar Larvae

AbstractExtreme high-temperature events are the key factor to determine population dynamics of the rice leaf folder,Cnaphalocrocis medinalis(Guenée), in summer. Although we know that adult of this insect can migrate to avoid heat stress, the behavioral response of larva to high temperature is still unclear. Therefore, impacts of high temperature on behavioral traits ofC. medinalisincluding host choice, settling and folding leaf were observed. The results revealed that these behavioral traits were clearly influenced by high temperature. The larvae preferred maize leaves rather than rice and wheat at normal temperature of 27°C, but larvae experienced a higher temperature of 37 or 40°C for 4 h preferred rice leaves rather than maize and wheat. Capacity of young larvae to find host leaves or settle on the upper surface of leaves significantly reduced when they were treated by high temperature. High temperature of 40°C reduced the leaf-folding capacity of the third instar larvae, but no effects were observed on the fourth and fifth instar larvae. Short-term heat acclimation could not improve the capacity of the third instar larvae to make leaf fold under 40°C.

scholarly journals High temperature infrared absorption cross sections of methane near 3.4 µm in Ar and CO2 mixtures

2018 ◽  
Vol 206 ◽  
pp. 36-45 ◽  
Author(s):  
Batikan Koroglu ◽  
Sneha Neupane ◽  
Owen Pryor ◽  
Robert E. Peale ◽  
Subith S. Vasu
Keyword(s):  
High Temperature ◽  
Cross Sections ◽  
Infrared Absorption ◽  
Absorption Cross
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