Endometrial Thermal Balloon Ablation Using a High Temperature, Pulsed System: A Mathematical Model

2003 ◽  
Vol 125 (6) ◽  
pp. 841-851 ◽  
Author(s):  
Daniel M. Reinders ◽  
Susan A. Baldwin ◽  
Joel L. Bert
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Treatment Time ◽  
Uterine Cavity ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Low Temperature Treatment ◽  
Balloon Ablation ◽  
Pulsed Treatment ◽  
Thermal Balloon

A new endometrial thermal balloon ablation treatment for menorrhagia is modeled mathematically to predict its efficacy and safety. A device preheats a fluid to 173°C within a reservoir external to the uterus, and then pulses this fluid without further heating between the reservoir and the balloon for 2.1 min of treatment time. The model predicted this treatment to result in consistent immediate tissue death (coagulation) depths of 3.4±0.1 mm for uterine cavities of 7 to 26 mL, and that eventual necrosis (tissue death that would occur 1–5 days post burn) may occur to depths of 6.5±0.2 mm. Whereas, burn depths varied with uterine cavity volume when a low temperature treatment (constant 75°C for 15 min) was modeled (2.3–2.9 mm and 6.8–8.2 mm, for immediate tissue death and eventual necrosis respectively). Similarly, the high temperature, pulsed treatment was less sensitive to blood perfusion rate than the low temperature treatment. Predicted eventual necrosis depth was 1.5 mm less for the high temperature, pulsed treatment than that predicted for a low temperature treatment (constant 87°C for 7 min) for the same immediate tissue death depth (3.5 mm), indicating that the new high temperature treatment may result in less damage to non targeted tissues.

scholarly journals LEVELS OF HORMONES TRIIODOTHYRONINE AND PLASMA BLOOD GLUCOSE BROILER STARTER DUE TO HEAT STRESS AND PRELIMINARY DIFFERENCE FEEDING TIME

2018 ◽  
Vol 6 (1) ◽  
pp. 421-427
Author(s):  
Liborio Ximenes ◽  
Pratiwi Trisunuwati ◽  
Muharlien
Keyword(s):  
Heat Stress ◽  
Blood Glucose ◽  
High Temperature ◽  
Low Temperature ◽  
Block Design ◽  
Temperature Treatment ◽  
Initial Time ◽  
Feeding Time ◽  
Glucose Levels ◽  
Low Temperature Treatment

The study was conducted to know blood glucose and triiodothyronine levels of broiler starter due to heat stress and different initial-time feeding. The material used in this study was 64 male DOC broilers of Lohmann strain with the average initial weight of 47.98 ± 2.24 g. The experiment was designed based on randomized block design with a 2x2 factorial and four replications. The treatment combinations as follow: S1W1 = low temperature, feeding 12 hours post-hatching; S1W2 = low temperature, feeding 24 hours post-hatching; S2W1 = high temperature, feeding 12 hours post-hatching; S2W2 = high temperature, feeding 24 hours post-hatching. The Data were Analyzed by using ANOVA. If there was a significant effect (P <0.05) or very significant effect (P <0.01) in Followed by Duncan's test. The result Showed that heat stress treatment significantly affected (P <0.05) to the triiodothyronine level, while initial feeding treatment had no significant effect. Also, blood glucose levels had no significant effect due to the treatments. It concluded that heat stress negatively affected by the blood glucose and triiodothyronine levels of broiler starter. The initial-time feeding has no effect on the blood glucose and triiodothyronine levels. Interactions between treatment and different temperature-time initial feeding have no effect. Nevertheless, the low temperature treatment and initial feeding of 12 hours post-hatching shows the best results with blood glucose 246.25 ± 9.91 mg / dl and triiodothyronine of 2.05 ± 0.14 ng / ml.

scholarly journals Dynamics of starch synthesis enzymes and their relationship with chalkiness of early indica rice under different postanthesis temperature regimes

2019 ◽  
Vol 44 (2) ◽  
pp. 223-238
Author(s):  
Mohammed Humayun Kabir ◽  
Qing Liu ◽  
Shitou Xia ◽  
Ruozhong Wang ◽  
Langtao Xiao
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Indica Rice ◽  
Starch Synthesis ◽  
Grain Filling ◽  
Temperature Treatment ◽  
Low Temperature Treatment ◽  
Temperature Regimes ◽  
Grain Filling Rate ◽  
Head Rice

An experiment on an early indica rice cv. ‘Shenyou9576’ was conducted in the Key Laboratory of Phytohormones and Growth Development of Hunan Agricultural University, Changsha, Hunan, PR China in 2014 to investigate the influence of varying post-anthesis temperatures on chalkiness rate, head rice rate, and on major 6 starch synthesis enzymes i.e., SuSy (EC 1.9.3.1), ADPG-Ppas (EC 2.7.7.27), SSS (EC 2.4.1.21) and GBSS, (EC 2.4.1.21), SBE (EC 2.4.1.18) and SDBE (EC 3.2.1.70). The treatments comprised of three temperature regimes which are designated as the high (35/28oC- day/night), low (25/20oC- day/night) and natural condition (35/25oC-day/night) as the control. Under high temperature maximum chalkiness rate was 61.11% and minimum was 22.59% under low temperature treatment. The lowest head rice rate was 42.76% under high temperature treatment followed by 49.91% in the control, while the highest rate was 62.33% under low temperature treatment. Maximum grain filling rate (Gmax) was found highest (1.69 mg/day) in the high temperature and average grain filling rate (Gavg) was found highest (1.36 mg/day) under the control. The activity of SuSy, ADPG-Ppase, SSS and GBSS were decreased gradually from 14 to 35 days after flowering (DAF). Irrespective of the treatments, an increasing trend of ADPG-Ppase activity was observed from 7 to 14 DAF and then declined. Correlation between the chalkiness and the enzymes activity of SuSy, ADPG-Ppase and SSS were significantly negative at 21, 28 and 35 DAFs, i.e., higher activity of SuSy, ADPG-Ppase and SSS at the mid-late to the late caryopsis development stage mediated by low temperature treatment played an important role for the reduction of chalkiness. The correlation between GBSS activity and chalkiness was significantly negative and stronger at 14, 21 and 28 DAF indicating that GBSS played a cardinal role to reduce chalkiness in the mid to mid-late stage of rice grain development. Significantly negative correlation was found between starch branching enzyme (SBE) and chalkiness at 21, 28 and 35 DAF, i.e., the higher SBE activity under low temperature treatment at the later grain filling stage also had a positive role in reduction of chalkiness. Bangladesh J. Agril. Res. 44(2): 223-238, June 2019

Effects of short-term temperature fluctuations on leaf photosynthesis in corn (Zea mays)

1979 ◽  
Vol 57 (21) ◽  
pp. 2387-2393 ◽  
Author(s):  
M. R. Thiagarajah ◽  
L. A. Hunt ◽  
R. B. Hunter
Keyword(s):  
Zea Mays ◽  
Low Temperature ◽  
Temperature Stability ◽  
Temperature Fluctuations ◽  
Complete Recovery ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Genotypic Differences ◽  
Short Term ◽  
Low Temperature Treatment

The effects of short-term temperature fluctuations on net photosynthetic rates (Pn) are described for a single-cross corn (Zea mays L.) hybrid (Harrow 691). The hybrid was grown at 25 °C and subjected to 4 days at either 15 or35 °C, and then maintained at 25 °C. Genotypic differences in tolerance of Pn to low temperature were studied using 12 hybrids of different maturities grown at 25 °C and subjected to 4 days at 15 °C.Following low temperature treatment. Pn was initially reduced by about 15% for leaves 5. 9. and 13 of hybrid Harrow 691. but completely recovered after 1 day at 25 °C. Following high temperature treatment, leaves 5 and 9 showed similar reductions in Pn whereas leaf 13 was not affected. The photosynthetic activity of the heat-stressed leaf 9 recovered after 1 day, but that of leaf 5 showed no recovery for 14 days at 25 °C.Among 12 hybrids. Pn of the newly matured leaf 7 was reduced after the low temperature treatment, but the reduction was more drastic for two late hybrids than for three early hybrids. Most hybrids showed complete recovery of Pn after 1 day at 25 °C. but genotypic differences were evident. The results reported indicate that further evaluation of the amount of genetic variation in temperature stability in corn could be carried out usefully.

Influence of Temperature and Gibberellins on Growth and Development of Tuberose in Greenhouse

2013 ◽  
Vol 788 ◽  
pp. 329-333
Author(s):  
Jing Hui Yang ◽  
Hui Jie Xu ◽  
Jian Ke Li ◽  
Jun Xuan Huang ◽  
Yan Jun Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Cold Treatment ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Planting Dates ◽  
Flowering Duration ◽  
Low Temperature Treatment ◽  
Different Temperatures ◽  
Forcing Culture

In order to advance blooming from autumn to spring and to evaluate the vegetative and reproductive characteristics of tuberose, the forcing culture was carried out in greenhouse by treatments of temperature (ck, 4 °C, and 30 °C) and GA3 (0, 40, and 80 mg·L1)on corms before planting. The results showed that number of days to flower with corms treated at 4 or 30 °C was reduced and the corm sprouting was enhanced significantly in all planting dates. High temperature treatment made more corms sprouting than cold treatment except the Dec planting. Flowering percentage at 4 °C was enhanced in the Dec planting compared with CK (15 °C). Low temperature treatment significantly reduced length of spikes in Oct planting. The number of florets per spike was decreased significantly by the low or high temperature treatments in both Oct and Dec plantings. There was no difference in floret number under different temperatures except Oct plantings. GA3 had no significant effects on flowering duration when corms were planted at the same dates. GA3 had less influence on growth and flowering of Double compared with the temperature treatment. The quality of cutting flowers was decreased in greenhouse compared with local field production. Therefore, the forcing cultivation of tuberose may be performed with Double and no man-forced winter dormancy of corm treated at 4 °C for 30 days or 30 °C for 15 days before planting.

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