scholarly journals Hot Water Treatment for Chilling Injury Reduction of Astringent ‘Rojo Brillante’ Persimmon at Different Maturity Stages

HortScience ◽  
2008 ◽  
Vol 43 (7) ◽  
pp. 2120-2123 ◽  
Author(s):  
Cristina Besada ◽  
Alejandra Salvador ◽  
Lucía Arnal ◽  
Jose María Martínez-Jávega
Keyword(s):  
Early Stage ◽  
Chilling Injury ◽  
Hot Water ◽  
Maturity Stage ◽  
Hot Water Treatment ◽  
Mature Fruit ◽  
Injury Reduction ◽  
Maturity Stages ◽  
Advanced Stages ◽  
Water Treatments

The effects of hot water treatments (HWTs) on chilling injury (CI) of ‘Rojo Brillante’ persimmon treated at different maturity stages and stored at 1 °C have been investigated. HWT temperatures ranging from 45 to 55 °C were applied for periods of time of between 2.5 and 40 min. Reduction of CI by HWT depended on the maturity stage. HWTs reduced softening when they were applied to fruit at an early stage of maturity, but caused skin cracking and skin browning in middle and advanced stages of maturity. Incidence and severity of these disorders increased as HWT temperatures and treatment times increased and in more mature fruit.

scholarly journals Breaking Dormancy in Red Raspberry with Hot Water Treatment and its Effects on Cold Hardiness

2006 ◽  
Vol 131 (2) ◽  
pp. 209-213 ◽  
Author(s):  
Pauliina Palonen ◽  
Leena Lindén
Keyword(s):  
Water Treatment ◽  
Cold Hardiness ◽  
Treatment Temperature ◽  
Rubus Idaeus ◽  
Hot Water ◽  
Bud Dormancy ◽  
Hot Water Treatment ◽  
Red Raspberry ◽  
Breaking Dormancy ◽  
Water Treatments

`Maurin Makea', `Muskoka', ` Ottawa', and `Preussen' red raspberry (Rubus idaeus L.) canes were collected from the field and subjected to different hot water treatments (20, 35, 40, 45, and 50 °C) to determine if endodormancy could be removed by a near lethal stress. Estimation of days for 50% budbreak (DD50) was found useful for describing the state of bud dormancy in the samples. Bud dormancy was broken in `Ottawa' by immersing the canes in 45 °C water for 2 hours, in `Maurin Makea' by treating the canes in 40 °C water, and in `Preussen' by both 40 and 45 °C treatments. The influence of this treatment on dormancy and cold hardiness at different times of the winter was further examined using `Ottawa' raspberry. The treatment removed bud dormancy most effectively in October, when the samples were in deepest dormancy. A slight effect was observed in November, but no effect in January. During ecodormancy in February the treatment delayed budbreak. Hot water treatment reduced cold hardiness of `Ottawa' canes by 8 to 15 °C, and that of buds by 9 to 13 °C during both endo- and ecodormancy. Based on the capacity of buds and canes to reacclimate, recovery from the stress treatment was possible at temperatures ≥4 °C. Loss of cold hardiness was caused by high treatment temperature itself and was not related to breaking of dormancy in samples. This finding suggests that dormancy and cold hardiness are physiologically unconnected in raspberry.

scholarly journals PRINCE WILLIAM SOUND INTERTIDAL BIOTA SEVEN YEARS LATER: HAS IT RECOVERED?

1997 ◽  
Vol 1997 (1) ◽  
pp. 679-686 ◽  
Author(s):  
Jonathan P. Houghton ◽  
Robert H. Gilmour ◽  
Dennis C. Lees ◽  
William B. Driskell ◽  
Sandra C. Lindstrom ◽  
...  
Keyword(s):  
High Pressure ◽  
Hot Water ◽  
Rocky Shores ◽  
Hot Water Treatment ◽  
Prince William Sound ◽  
Associated Fauna ◽  
Short Term ◽  
Species Abundances ◽  
Rocky Habitats ◽  
Water Treatments

ABSTRACT Eight years of quantitative biological and chemical data have been analyzed for trends in recovery of biota inhabiting beaches in Prince William Sound following the 1989 Exxon Valdez oil spill and subsequent shoreline treatments. Sampling has focused on biota at sheltered rocky and mixed-soft sites subjected to three degrees of disturbance (unoiled, oiled but not hot-water washed, and oiled/hot-water washed). Only epibiota on sheltered rocky habitats are covered in this paper. The majority of community dominants survived 1989 on oiled rocky shores that were not high-pressure, hot-water washed. These areas appeared to be nearly completely recovered by 1991, although subsequent monitoring has revealed oscillations in species abundances that exceed those on unoiled beaches. Hot-water treatments used in 1989 had severe short-term impacts on intertidal epibenthos. Some high-pressure, hot-water-treated rocky shores stripped of biota in 1989 showed very slow colonization through 1995; other areas that appeared to be nearly recovered in 1992 suffered severe declines in dominant taxa in 1995. The dominant age class of rockweed, which began life following hot-water treatment, matured in 1993 and died off in 1994 and 1995, resulting in declines of associated fauna. A new cycle of rockweed colonization has begun, and some recovery of rockweed and associated fauna was observed in 1996.

scholarly journals Incidência de pinta preta e características físico-químicas de goiabas submetidas a tratamentos pós-colheita

2016 ◽  
Vol 7 (3) ◽  
pp. 383
Author(s):  
Ivan Herman Fischer ◽  
Maria Cecília de Arruda Palharini ◽  
Ana Paula dos Santos ◽  
Antônio Fernandes Nogueira Júnior ◽  
Marise Cagnin Martins Parisi
Keyword(s):  
Skin Color ◽  
Color Change ◽  
Black Spot ◽  
Cassava Starch ◽  
Hot Water ◽  
Postharvest Diseases ◽  
Guava Fruit ◽  
Maturity Stages ◽  
Physical And Chemical Quality ◽  
Water Treatments

The guava fruit is very as high perishable due to its intense metabolism and the occurrence of postharvest diseases. Due to the lack conservation technologies for this fruit, this study aimed to evaluate the effect of alternative products [potassium phosphite, calcium chloride, cassava starch edible coat, 1-methylcyclopropene (1-MCP), ethanol followed by dichloro s. triazinatriona sodium (ethanol+chlorine)] and hot water treatments, singly or in combination, in black spot control and the physic-chemical characteristics of ‘Pedro Sato’ guavas. The treatments were evaluated in naturally infected guavas at three maturity stages and stored at 22-25ºC and 80-85% RH for 8 days. The treatment association of ethanol+chlorine and cassava starch reduced the incidence of black spot in three maturity stages of guavas, allowing the increase of fruit’s shelf life, with a delay of two to four days in the onset of black spot symptoms. The maintenance of the physical and chemical quality characteristics of guavas with association of treatments were evidenced by the delay in skin color change, and a smaller decrease in firmness. Correlation occurred between the black spot incidence and the skin color parameter, ie, fruits harvested at later maturity stages presented higher incidence of the disease. The greater efficiency of ethanol+chlorine/starch association in the control of black spot was directly related to the ripening delay in fruits, evidenced by the skin color and firmness attributes.

scholarly journals 618 Effect of Preplant Hot-water and Fungicide Treatments on Tuber Development of Caladiums

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 503F-504
Author(s):  
Gary J. Wilfret
Keyword(s):  
Water Treatment ◽  
Hot Water ◽  
Additive Effect ◽  
Hot Water Treatment ◽  
Tuber Weight ◽  
Tuber Development ◽  
Thiophanate Methyl ◽  
Production Index ◽  
Production Indices ◽  
Water Treatments

Intact tubers of Caladium cv. Florida Elise were soaked for 30 min in water at 24 or 50 °C in l998 and manually cut into cubes with 2-cm sides. Propagules were planted on 15-cm centers in raised sand beds covered with white plastic. Tubers were harvested in 6 months, air-dried, cleaned, weighed, and graded. Yield of No. 2 tubers (>1.9 <3.8 cm diam) was increased 31%, total tuber weight was 13% greater, and the production index was 13% larger due to hot-water treatment. No differences were determined for other tuber sizes. Tubers harvested from both treatments were soaked for 30 min in 1999 in water at 24 or 50 °C or in water at 24 or 50 °C that contained the fungicide Systec 85WDG [thiophanate methyl(dimethyl{(1,2-phenylene)-bis(iminocarbonothioyl)}bis{carbamate}] at 33.6 g/20 L. Tubers were cut and planted as in l998 and harvested in 2000. Tuber yields and production indices were greater in all hot-water treatments, but were not increased by fungicides alone. Yields from tubers that were not hot-water treated in l998 but were soaked in hot water in l999 were similar to those tubers that were hot-water-treated in both years. Fungicides did not have an additive effect when hot-water was used.

Mechanism of resistance in Australian sugarcane parent clones to smut and the effect of hot water treatment

2013 ◽  
Vol 64 (9) ◽  
pp. 892 ◽  
Author(s):  
Shamsul A. Bhuiyan ◽  
Barry J. Croft ◽  
Emily C. Deomano ◽  
Rebecca S. James ◽  
Joanne K. Stringer
Keyword(s):  
Water Treatment ◽  
Resistance Mechanism ◽  
Resistance Mechanisms ◽  
Internal Resistance ◽  
Hot Water ◽  
Hot Water Treatment ◽  
External Resistance ◽  
Sugarcane Plant ◽  
Mechanism Of Resistance ◽  
Water Treatments

Resistance of sugarcane plants to smut is believed to be manifested by two mechanisms, (i) external resistance, governed by structural barrier of bud scale and/or chemical secretion from the bud, and (ii) internal resistance, regulated by interaction of plants and fungus within the plant tissue. Hot water treatments are routinely used to treat seed cane to eliminate a range of diseases including smut. It is believed that hot water treatment predisposes sugarcane plant to smut. This study was conducted to determine the resistance mechanisms of some important Australian parent clones, and their response to hot water treatment in relation to smut infection. Twenty-one clones, used regularly in the Australian sugarcane breeding program, were evaluated. Results showed that ~47% of clones had external and 33% had internal resistance mechanisms, indicating that parent clones selected for this study possessed diverse mechanism of resistance. There is a possibility some or all clones with internal resistance mechanisms could also possess external resistance mechanism. Except one highly susceptible clone (Q205) in one trial, none of the clones subject to hot water treatment became more susceptible to smut. Although some clones showed increased resistance after hot water treatment. These findings will benefit breeders in selecting parent materials in their crossing programs to develop smut-resistant cultivars.

Effect of fruit maturity on the response of 'Kensington' mango fruit to heat treatment

2001 ◽  
Vol 41 (6) ◽  
pp. 793 ◽  
Author(s):  
K. K. Jacobi ◽  
E. A. MacRae ◽  
S. E. Hetherington
Keyword(s):  
Water Treatment ◽  
Titratable Acidity ◽  
Hot Water ◽  
Soluble Solids ◽  
Hot Water Treatment ◽  
Immature Fruit ◽  
Conditioning Treatment ◽  
Fruit Maturity ◽  
Conditioning Temperature ◽  
Water Treatments

The effects of conditioning and hot water treatments on immature and mature ‘Kensington’ mangoes were examined. A hot water treatment of 47°C fruit core temperature held for 15 min increased weight loss (50%), fruit softness (15%), disrupted starch hydrolysis and interacted with maturity to reduce the skin yellowness (40–51%) of early harvested fruit. Immature fruit were more susceptible to hot water treatment-induced skin scalding, starch layer and starch spot injuries and disease. Conditioning fruit at 40°C for up to 16 h before hot water treatment accelerated fruit ripening, as reflected in higher total soluble solids and lower titratable acidity levels. As fruit maturity increased, the tolerance to hot water treatment-induced skin scalding and the retention of starch layers and starch spots increased and susceptibility to lenticel spotting decreased. A conditioning treatment of either 22° or 40°C before hot water treatment could prevent the appearance of cavities at all maturity levels. The 40°C conditioning temperature was found to be more effective in increasing fruit heat tolerance than the 22°C treatment; the longer the time of conditioning at 40°C, the more effective the treatment (16 v. 4 h). For maximum fruit quality, particularly for export markets, it is recommended that mature fruit are selected and conditioned before hot water treatment to reduce the risk of heat damage.

Titania Nanocrystals-Dispersed Coatings from SiO2-TiO2 Gel Films through Hydrolysis and Dissolution

2006 ◽  
Vol 317-318 ◽  
pp. 565-568 ◽  
Author(s):  
Atsunori Matsuda ◽  
T. Kogure ◽  
Hiroyuki Muto ◽  
Mototsugu Sakai ◽  
Kiyoharu Tadanaga ◽  
...  
Keyword(s):  
Sol Gel ◽  
Nucleation And Growth ◽  
Hot Water ◽  
Crystal Habit ◽  
Hot Water Treatment ◽  
Photocatalytic Activities ◽  
New Applications ◽  
Water Treatments ◽  
Hydrolysis Of ◽  
Component Migration

Anatase nanocrystals were formed on sol-gel derived SiO2-TiO2 coatings with water vapor or hot water treatments. The anatase nanocrystals were precipitated through hydrolysis of Si-O-Ti bonds, dissolution of SiO2 component, migration of hydrolyzed titania species, and nucleation and growth. The process temperatures can be lowered below 60oC, which should open new applications. It was found that the crystal habit of titania was changes from roundish anatase to sheet-like titania by applying vibration during the hot water treatment. The nanosheets were identified as hydrated titania, TiO2 . mH2O, with layerd structure. The coatings of hydrated titania showed high photocatalytic activities and excellent antifogging properties due to their unique morphology.

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