Design of constant temperature cooling device for melanoma screening by dynamic thermography

2021 ◽  
Vol 125 ◽  
pp. 66-79
Author(s):  
T. Gomboc ◽  
J. Iljaž ◽  
L.C. Wrobel ◽  
M. Hriberšek ◽  
J. Marn
Keyword(s):  
Constant Temperature ◽  
Cooling Device ◽  
Melanoma Screening ◽  
Dynamic Thermography

scholarly journals Evaluation of Perfusion and Thermal Parameters of Skin Tissue Using Cold Provocation and Thermographic Measurements

2016 ◽  
Vol 23 (3) ◽  
pp. 373-381 ◽  
Author(s):  
Maria Strąkowska ◽  
Robert Strąkowski ◽  
Michał Strzelecki ◽  
Gilbert de Mey ◽  
Bogusław Więcek
Keyword(s):  
Thermal Parameters ◽  
Skin Tissue ◽  
Transfer Model ◽  
Cooling Device ◽  
Novel Approach ◽  
Peltier Module ◽  
Measurement Results ◽  
Cold Provocation ◽  
Dynamic Thermography ◽  
Perfusion Coefficient

AbstractMeasurement of the perfusion coefficient and thermal parameters of skin tissue using dynamic thermography is presented in this paper. A novel approach based on cold provocation and thermal modelling of skin tissue is presented. The measurement was performed on a person’s forearm using a special cooling device equipped with the Peltier module. The proposed method first cools the skin, and then measures the changes of its temperature matching the measurement results with a heat transfer model to estimate the skin perfusion and other thermal parameters. In order to assess correctness of the proposed approach, the uncertainty analysis was performed.

Improvement in the Fock test for determining the reactivity of dissolving pulp

TAPPI Journal ◽  
2013 ◽  
Vol 12 (11) ◽  
pp. 21-26 ◽  
Author(s):  
CHAO TIAN ◽  
LINQIANG ZHENG ◽  
QINGXIAN MIAO ◽  
CHRIS NASH ◽  
CHUNYU CAO ◽  
...  
Keyword(s):  
Moisture Content ◽  
Sodium Hydroxide ◽  
Constant Temperature ◽  
Carbon Disulfide ◽  
Testing Procedure ◽  
Dissolving Pulp ◽  
Water Bath ◽  
Testing Conditions ◽  
Pulp Sample ◽  
Fock Reactivity

The Fock test is widely used for assessing the reactivity of dissolving pulp. The objective of this study was to modify the method to improve the repeatability of the test. Various parameters that affect the repeatability of the Fock test were investigated. The results showed that Fock reactivity is dependent on testing conditions affecting the xanthation between cellulose and carbon disulfide, such as the moisture content of the pulp sample, sodium hydroxide (NaOH) concentration, xanthation temperature, carbon disulfide dosage, and xanthation time. The repeatability of the test was significantly improved using the following modified testing procedure: air dried sample in the constant temperature/humidity room, xanthation temperature of 66°F (19°C) in a water bath, xanthation time of 3 h, NaOH concentration of 9% (w/w), and 1.3 mL carbon disulfide.

ACTION OF ENZYME DIGESTED PITUITARY GLANDS OF THE SKIPPER-FROG ON THE OVULATION OF THE SAME

1960 ◽  
Vol XXXIII (II) ◽  
pp. 255-260 ◽  
Author(s):  
L. S. Ramaswami ◽  
A. B. Lakshman
Keyword(s):  
Pituitary Gland ◽  
Constant Temperature ◽  
Constant Temperature Bath ◽  
Predominant Role ◽  
Lower Vertebrates ◽  
Pituitary Glands ◽  
Stimulating Factor

ABSTRACT By using enzymes, the gonadotrophic factors in the skipper-frog pituitary glands have been selectively inactivated or destroyed. By incubating a known number of pituitary gland homogenate with ptyalin in a constant temperature bath for 5–6 h the follicle-stimulating factor is inactivated; with trypsin or pepsin, the luteinizing factor is inactivated. Bioassay on gravid skipper-frogs indicate that the ptyalin digested homogenate brings about profuse spawning while the trypsin or pepsin digested homogenates do not. When a combination of ptyalin digested and trypsin digested homogenates is injected into fresh gravid skipper-frogs, poor spawning is brought about. These experiments show that the luteinizing factor alone brings about more profuse spawning than when it is combined with the follicle-stimulating factor. It is likely, therefore, that in the lower vertebrates the luteinizing factor of the pituitary gland plays a more predominant role. The exact proportions in which the different dosages for the control and test animals are administered are also tabulated.

A Micromachined Microjet Array Impingement Cooling Device for High Power Electronics

2004 ◽  
Author(s):  
Simon S. Ang ◽  
Paneer Selvam ◽  
Ajay Malshe ◽  
Fred Barlow
Keyword(s):  
Power Electronics ◽  
High Power ◽  
Cooling Device ◽  
Impingement Cooling

Hair Loss Prevention by a Scalp Cooling Device in Early Breast Cancer Patients: The Poliambulanza Preliminary Experience

2019 ◽  
Vol 14 (1) ◽  
pp. 66-71 ◽  
Author(s):  
Tiziana Prochilo ◽  
Alessandra Huscher ◽  
Federica Andreis ◽  
Mara Mirandola ◽  
Elisabetta Zaina ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Patients ◽  
Hair Loss ◽  
Depression Scale ◽  
Hair Follicles ◽  
Common Side Effect ◽  
Scalp Cooling ◽  
Breast Cancer Patients ◽  
Cooling Device ◽  
End Of Treatment

Background: The most effective agents in the treatment of breast cancer have a common side effect, the hair loss. Some studies reported a reduction of hair loss with the use of the scalp cooling device. Indeed, it decreases the drug accumulation in the hair follicles. We report our preliminary experience with a scalp cooling device in reducing chemotherapy-induced alopecia and related distress in breast cancer patients undergoing adjuvant chemotherapy. </P><P> Methods: Hair loss grading and treatment tolerability were evaluated during chemotherapy every 21 days and 3 weeks after the last cycle of chemotherapy via Dean’s scale by patients and operators and a comfort analogic scale by patients. We administered the Hospital Anxiety and Depression Scale questionnaire at the baseline and at the end of treatment to assess the distress related to chemotherapy- induced alopecia. Results: Among the 46 patients identified, 27 accepted the device. The eligible chemotherapy regimens included docetaxel+cyclophosphamide (TC), doxorubicin+cyclophosphamide (AC) and paclitaxel (P) weekly+trastuzumab (T). 24 pts (89%) completed the treatment; 3 pts (11%) treated with AC prematurely interrupted use of the scalp-cooling device due to inefficacy. After the last cycle of chemotherapy, the number of patient who perceived a HL < grade 2 was 16 (59%). The hair retention reported by operators has been higher (78%). 81.5% of patients well tolerated the treatment. Conclusion: In our study, the scalp-cooling device reduced chemotherapy-induced alopecia in taxane- based chemotherapy. Furthermore, it suggests a discordance in hair loss perception between patients and operators.

Control of the adiabatic flow reactor by feeding the catalyst solution

1979 ◽  
Vol 44 (8) ◽  
pp. 2352-2365
Author(s):  
Josef Horák ◽  
Zina Sojková ◽  
František Jiráček
Keyword(s):  
Steady State ◽  
Constant Temperature ◽  
Reaction Temperature ◽  
Control Algorithm ◽  
Flow Reactor ◽  
Operating Temperature ◽  
Temperature Deviation ◽  
Adiabatic Flow ◽  
Dosing Frequency ◽  
Laboratory Reactor

Control algorithm of the operating temperature is described in the reactor, which is operated at constant temperature and composition of the inlet mixture. The temperature is controlled by dosing a constant volume of the catalyst solution. The dosing frequency is determined according to the reaction temperature (deviation of the temperature from the desired value and the sign of the derivative of temperature). The control algorithm has been verified experimentally for the laboratory reactor in unstable steady state.

Temperature and concentration dependence of equivalent conductivity in Ca(NO3)2-CaI2-H2O system

1980 ◽  
Vol 45 (6) ◽  
pp. 1639-1645 ◽  
Author(s):  
Jindřich Novák ◽  
Ivo Sláma
Keyword(s):  
Linear Function ◽  
Concentration Dependence ◽  
Mole Fraction ◽  
Constant Temperature ◽  
Salt Concentration ◽  
Free Water ◽  
Water Molecules ◽  
Equivalent Conductivity ◽  
Calcium Salts ◽  
Fraction I

The dependence of the equivalent conductivity on the temperature and composition of the Ca(NO3)2-CaI2-H2O system was studied. The ionic fraction [I-]/([I-] + [NO-3]) was changed from 0.1 to 0.5, the mole fraction of calcium salts (assumed in anhydrous form in the presence of free water molecules) was 0.075-0.200. The equivalent conductivity was found to be a linear function of the ionic fraction at constant temperature and salt concentration.

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