Acceder

Bibliografías temáticas / Testis Effect of heat on / Artículos de revistas

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Testis Effect of heat on.

Artículos de revistas sobre el tema "Testis Effect of heat on"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 28 de enero de 2023

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores artículos de revistas para su investigación sobre el tema "Testis Effect of heat on".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore artículos de revistas sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Hamilton, Thais Rose dos Santos, Adriano Felipe Perez Siqueira, Letícia Signori de Castro, Camilla Mota Mendes, Juliana de Carvalho Delgado, Patrícia Monken de Assis, Leonardo Pereira Mesquita, et al. "Effect of Heat Stress on Sperm DNA: Protamine Assessment in Ram Spermatozoa and Testicle." Oxidative Medicine and Cellular Longevity 2018 (2018): 1–14. http://dx.doi.org/10.1155/2018/5413056.

Texto completo

Resumen

Sperm DNA fragmentation is considered one of the main causes of male infertility. The most accepted causes of sperm DNA damage are deleterious actions of reactive oxygen species (ROS), defects in protamination, and apoptosis. Ram sperm are highly prone to those damages due to the high susceptibility to ROS and to oxidative stress caused by heat stress. We aimed to evaluate the effects of heat stress on the chromatin of ejaculated and epididymal sperm and the activation of apoptotic pathways in different cell types in ram testis. We observed higher percentages of ejaculated sperm with increased

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Hu, Suqin, Dianlong Liu, Sijia Liu, Chunrui Li, and Jian Guo. "Lycium barbarum Polysaccharide Ameliorates Heat-Stress-Induced Impairment of Primary Sertoli Cells and the Blood-Testis Barrier in Rat via Androgen Receptor and Akt Phosphorylation." Evidence-Based Complementary and Alternative Medicine 2021 (May 3, 2021): 1–10. http://dx.doi.org/10.1155/2021/5574202.

Texto completo

Resumen

Male infertility induced by heat stress has been attracting more and more attention. Heat stress not only causes apoptosis of spermatocytes but also has adverse effects on Sertoli cells, further damaging spermatogenesis. Lycium barbarum polysaccharide (LBP) is the main bioactive component of Lycium barbarum, which has a protective effect on male reproduction, but its mechanism is still unclear. In this study, our results proved that LBP blocked the inhibitory effect on the proliferation activity of Sertoli cells after heat stress, reversed the dedifferentiation of Sertoli cells induced by heat

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Setchell, B. P., A. Locatelli, C. Perreau, C. Pisselet, I. Fontaine, C. Kuntz, J. Saumande, J. Fontaine, and M. T. Hochereau-de Reviers. "The form and function of the Leydig cells in hypophysectomized rams treated with pituitary extract when spermatogenesis is disrupted by heating the testes." Journal of Endocrinology 131, no. 1 (October 1991): 101–12. http://dx.doi.org/10.1677/joe.0.1310101.

Texto completo

Resumen

ABSTRACT The morphology and in-vivo function of the Leydig cells were studied in rams when spermatogenesis had been disrupted by a single exposure of the testes 20 days earlier to a temperature of about 42 °C for 45 min. To avoid complications due to changed negative feedback from the testes to the pituitary with consequent changes in the degree of gonadotrophic stimulation, ten of the animals (five heated and five unheated) were surgically hypophysectomized when the testes were heated and then treated twice daily with pituitary extract. Six intact rams (three heated and three unheated) were a

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Kheradmand, Arash, Omid Dezfoulian, and Mohammad Javad Tarrahi. "Ghrelin attenuates heat-induced degenerative effects in the rat testis." Regulatory Peptides 167, no. 1 (February 2011): 97–104. http://dx.doi.org/10.1016/j.regpep.2010.12.002.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Guo, Jian, Shi-Xin Tao, Min Chen, Yu-Qiang Shi, Zhu-Qiang Zhang, Yin-Chuan Li, Xue-Sen Zhang, Zhao-Yuan Hu, and Yi-Xun Liu. "Heat Treatment Induces Liver Receptor Homolog-1 Expression in Monkey and Rat Sertoli Cells." Endocrinology 148, no. 3 (March 1, 2007): 1255–65. http://dx.doi.org/10.1210/en.2006-1004.

Texto completo

Resumen

We demonstrated in this study that liver receptor homolog-1 (LRH-1) was expressed in the round spermatids in normal monkey testis, and no LRH-1 signal was observed in the Sertoli cells. After local warming (43 C) the monkey testis, however, LRH-1 expression was induced in the Sertoli cells in coincidence with activation of cytokeratin 18 (CK-18), a Sertoli cell dedifferentiated marker. Furthermore, we isolated rat primary Sertoli cells from testes at various stages of development and treated with 43 C water in vitro. The changes in LRH-1 as well as CK-18 expression were analyzed by confocal im

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Hou, Ying, Peipei Yuan, Yang Fu, Qi Zhang, Yaxin Wei, Liyuan Gao, Li Liu, Xiaolan Wang, Xiaoke Zheng, and Weisheng Feng. "Duzhong Butiansu Prescription Improves Heat Stress-Induced Spermatogenic Dysfunction by Regulating Sperm Formation and Heat Stress Pathway." Evidence-Based Complementary and Alternative Medicine 2020 (February 27, 2020): 1–11. http://dx.doi.org/10.1155/2020/6723204.

Texto completo

Resumen

Background. Duzhong Butiansu (DZBTS) prescription contains many traditional Chinese medicines and has been shown to have a curative effect on male fertility. However, the efficacy and mechanism of DZBTS in the treatment of male infertility induced by heat stress have not been reported. The aim of the present study is to elucidate the effect and mechanism of DZBTS on spermatogenic function of a heat stress model in rats. Methods. Male Wistar rats (280–320 g) were given different doses of DZBTS (0.4853 g/kg/d or 0.9707 g/kg/d), Shengjing capsule (0.56 g/kg/d), or double distilled water for 15 da

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Mohajeri, D., and R. Kaffashi Elahi. "Effects of Nigella sativa on heat-induced testis damage in mouse." Bratislava Medical Journal 116, no. 04 (2015): 264–69. http://dx.doi.org/10.4149/bll_2015_051.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Rahman, A., MM Hossain, M. Khan, MT Kamal, and MA Hashem. "Effect of Heat Stress on Bucks Adaptability and Semen Characteristics." Journal of Environmental Science and Natural Resources 9, no. 1 (November 8, 2016): 151–56. http://dx.doi.org/10.3329/jesnr.v9i1.30309.

Texto completo

Resumen

The experiment was conducted to investigate the effect of heat stress on adaptability and semen quality of buck. Almost similar 10 Black Bengal bucks were selected for the study at Artificial Insemination Centre, Bangladesh Agricultural University, Bangladesh. Prerequisite biological data were collected from each animal before keeping them sun heat and after 1 hour sun exposure. Different semen characteristics of each animal were measured. Temperature humidity index (THI) was 19.95 in the morning which indicate all the animals were in absence of heat stress and THI was 25.54 in the noon which

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Yaeram, J., B. P. Setchell, and S. Maddocks. "Effect of heat stress on the fertility of male mice in vivo and in vitro." Reproduction, Fertility and Development 18, no. 6 (2006): 647. http://dx.doi.org/10.1071/rd05022.

Texto completo

Resumen

A study was conducted to determine whether following exposure of male mice to high temperatures, the ability of their spermatozoa to fertilise ova was reduced, especially during the period before the males became completely infertile. Male mice placed in a microclimate chamber at 36°C for two periods, each of 12 h on successive days, were less able to fertilise control females in vivo when mated and, even in those females that became pregnant, litter size was reduced. However, these effects were associated with falls in testis weight and numbers of spermatozoa in the testis and epididymis. To

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Koide, Y., T. Ono, C. Ishinami, and K. Yamashita. "Alterations in activities of calmodulin and heat-stable calmodulin-binding protein in rat testis." American Journal of Physiology-Cell Physiology 250, no. 2 (February 1, 1986): C299—C305. http://dx.doi.org/10.1152/ajpcell.1986.250.2.c299.

Texto completo

Resumen

Effects of postnatal development, surgical cryptorchidism, and hypophysectomy on the activity of calmodulin and of a 32,000-molecular weight (32) calmodulin-binding protein (Ono et al., J. Biol. Chem. 259: 9011-9016, 1984) were examined in rat testis. In adult rats, approximately 95% of their activities distributed in seminiferous tubule preparation, and most of them were in the 105,000-g supernatant. Both activities were low early in the development, but the calmodulin activity increased between 25 and 45 days of age, and the 32 K calmodulin-binding protein activity increased between 35 and 4

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Chen, Z., J. R. Zhang, Y. W. Zhou, C. Liang, and Y. Y. Jiang. "Effect of heat stress on the pituitary and testicular development of Wenchang chicks." Archives Animal Breeding 58, no. 2 (October 13, 2015): 373–78. http://dx.doi.org/10.5194/aab-58-373-2015.

Texto completo

Resumen

Abstract. To study the effects of heat stress (HS) on the growth and reproductive performance of chicks, 1-day-old male Wenchang chicks were randomly selected and divided into control (CK) and HS groups. The two groups of birds were fed according to a routine. The chicks in the HS group were placed under HS for 2 h day−1 (temperature, 40 ± 0.5°; humidity, 63.0–80.0 %) until the sixth week. At the end of each week, six chicks were randomly selected from each group and dissected for pituitary and testicular tissues, which were then weighed and sectioned onto slides to observe the histological ch

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Kumazawa, T., K. Mizumura, M. Minagawa, and Y. Tsujii. "Sensitizing effects of bradykinin on the heat responses of the visceral nociceptor." Journal of Neurophysiology 66, no. 6 (December 1, 1991): 1819–24. http://dx.doi.org/10.1152/jn.1991.66.6.1819.

Texto completo

Resumen

1. Whether bradykinin (BK), which is known as an endogenous pain-producing substance, induces augmentation of the discharges of polymodal receptors evoked by heat stimulation was investigated in in vitro canine testis-superior spermatic nerve preparations. 2. The heat response was significantly augmented by pretreatments with BK at concentrations greater than 0.094 nM, whereas BK induced significant increases in the mean discharge rates at concentrations above 9.4 nM. Both effects increased in a concentration-dependent manner. The augmenting effect of BK on the heat response diminished within

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Al-Bagdadi, F., R. Stout, S. Farouqi, P. Crawford, M. Kearny, J. O’Donnell, and S. Husein. "Apoptosis In Experimental Unilateral Abdominal Cryptorchid Testis In Rat." Microscopy and Microanalysis 5, S2 (August 1999): 1182–83. http://dx.doi.org/10.1017/s1431927600019231.

Texto completo

Resumen

It has been reported that cryptorchidism caused disruption of spermatogenesis that become extensive with time (1). The process of spermatogenesis undergoes spontaneous degeneration in rats, the spermatids degenerate, the primary spermatocytes have been reported to degenerate more commonly (2). Apoptosis has been considered the route for removing sensitive germ cells after short-term experimental cryptorchidism (3). The abdominal heat stress causes cell loss by apoptotic pathway (4). The cellular damage of the experimentally induced cryptorchid adult rat is regulated by local testicular factors

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Forte, L. R., W. J. Krause, and R. H. Freeman. "Escherichia coli enterotoxin receptors: localization in opossum kidney, intestine, and testis." American Journal of Physiology-Renal Physiology 257, no. 5 (November 1, 1989): F874—F881. http://dx.doi.org/10.1152/ajprenal.1989.257.5.f874.

Texto completo

Resumen

The distribution of receptors for Escherichia coli enterotoxin were examined in opossum kidney, intestine, and testis. E. coli enterotoxin stimulated guanosine 3',5'-cyclic monophosphate (cGMP) production in renal cortex, testis, and small intestinal mucosa but had only a small effect in the colon. Atrial natriuretic factor enhanced the cGMP content of renal cortex and small intestine but had no effect on testis or colon. The enterotoxin receptors were observed to be localized in proximal tubules, to epithelial cells of crypts and villi of small intestine, to crypts of colon, and in seminifero

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Jahanbani G, Ashkan, and Tom A. Jelmert. "Effect of Heat Loss on Pressure Falloff Tests." International Journal of Engineering Trends and Technology 39, no. 1 (September 25, 2016): 28–36. http://dx.doi.org/10.14445/22315381/ijett-v39p205.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Nicholson, H. D., H. M. Greenfield, and J. Frayne. "The effect of germ cell complement on the presence of oxytocin in the interstitial and seminiferous tubule fluid of the rat testis." Journal of Endocrinology 143, no. 3 (December 1994): 471–78. http://dx.doi.org/10.1677/joe.0.1430471.

Texto completo

Resumen

Abstract In the rat testis oxytocin has been localized to the Leydig cells, and these cells have been shown to produce oxytocin in vitro. The present study was performed to determine whether oxytocin is present in the interstitial fluid (IF) and seminiferous tubule fluid (TF) of the rat and whether concentrations of the peptide vary within the two compartments following germ cell destruction. In order to destroy germ cells adult male rats were anaesthetized and their scrotal regions placed in a water bath at 43 °C for 20 min. Control animals were subjected to anaesthesia alone. Groups of 6 ani

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Holets, Lesya, Sudhakar Jakkaraj, Ramappa Chakrasali, Gunda I. Georg, and Joseph S. Tash. "Effect of Gamendazole on Expression of Heat Shock Proteins HSP70 and HSP90 in Rat Testis and Primary Sertoli Cells." Biology of Reproduction 81, Suppl_1 (July 1, 2009): 129. http://dx.doi.org/10.1093/biolreprod/81.s1.129.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

James, L. A., and W. J. Mills. "Effect of Heat-Treatment Upon the Fatigue-Crack Growth Behavior of Alloy 718 Weldments—Part I: Macroscopic Behavior." Journal of Engineering Materials and Technology 107, no. 1 (January 1, 1985): 34–40. http://dx.doi.org/10.1115/1.3225768.

Texto completo

Resumen

Gas-tungsten-arc weldments in Alloy 718 were studied in fatigue-crack growth tests conducted at five temperatures over the range 24–649°C. In general, crack growth rates increased with increasing temperature, and weldments given the “conventional” post-weld heat-treatment generally exhibited crack growth rates that were higher than for weldments given the “modified” (INEL) heat-treatment. Limited testing in the as-welded condition revealed crack growth rates significantly lower than observed for the heat-treated cases, and this was attributed to residual stresses. Three different heats of fill

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Liao, Zebin, Zhe Liu, Zhenyu Gong, Xuguang Hu, Yuanyuan Chen, Kun Cao, Hong Zhang, et al. "Heat-killed Salmonella Typhimurium protects mice against carbon ion radiation." Journal of International Medical Research 48, no. 10 (October 2020): 030006052092425. http://dx.doi.org/10.1177/0300060520924256.

Texto completo

Resumen

Objective Patients receiving carbon-ion radiation therapy and astronauts exploring outer space are inevitably exposed to heavy ion radiation. The aim of this study was to develop radioprotectors to minimize the injuries induced by carbon ion radiation. Methods Heat-killed Salmonella Typhimurium (HKST) was administered to mice by gavage prior to irradiation with a 12C6+ heavy ion accelerator. Hematoxylin and eosin staining and immunofluorescence TdT-mediated dUTP Nick-End Labeling staining were used to assess the radioprotective effect of HKST on organ damage and levels of apoptosis, respective

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Breitenbach, Anthony T., Amanda W. Carter, Ryan T. Paitz, and Rachel M. Bowden. "Using naturalistic incubation temperatures to demonstrate how variation in the timing and continuity of heat wave exposure influences phenotype." Proceedings of the Royal Society B: Biological Sciences 287, no. 1932 (August 5, 2020): 20200992. http://dx.doi.org/10.1098/rspb.2020.0992.

Texto completo

Resumen

Most organisms are exposed to bouts of warm temperatures during development, yet we know little about how variation in the timing and continuity of heat exposure influences biological processes. If heat waves increase in frequency and duration as predicted, it is necessary to understand how these bouts could affect thermally sensitive species, including reptiles with temperature-dependent sex determination (TSD). In a multi-year study using fluctuating temperatures, we exposed Trachemys scripta embryos to cooler, male-producing temperatures interspersed with warmer, female-producing temperatur

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Nasir, Gulboy A. "Effect of magnetized water on morphologically abnormal sperms and histopathological status of testis in mice." Journal of Biotechnology Research Center 6, no. 2 (June 17, 2012): 28–35. http://dx.doi.org/10.24126/jobrc.2012.6.2.217.

Texto completo

Resumen

ifty white Swiss male mice (6-7) weeks of age were randomly divided into two groups, and each group included 25 mice. Group 1 (treatment group) were get magnetic water, group 2 (control group) were get tap water. After whole experimental period (16 weeks), Animals sacrificed and sperms were collected from epididimyes, then histopathology for testis tissue was done and morphologically abnormal sperm of head sperm percentage were calculated. Results revealed that abnormalities of head sperm percentage in treatment group 0.99% were reduced compared with control group 1.03%, but the differences we

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Aydilek, N., O. Varisli, M. S. Kaya, A. Kocyigit, and A. Taskin. "272 EFFECT OF DIETARY RESTRICTION ON SPERM CHARACTERISTICS AND OXIDATIVE STATUS ON TESTICULAR TISSUE IN YOUNG RATS EXPOSED TO LONG-TERM HEAT STRESS." Reproduction, Fertility and Development 27, no. 1 (2015): 225. http://dx.doi.org/10.1071/rdv27n1ab272.

Texto completo

Resumen

The objective was to evaluate effects of dietary restriction on oxidative status and sperm parameters in rats exposed to long-term heat stress. Forty healthy Sprague-Dawley rats (2.5 months old) were equally allocated into 4 groups (with respect to diet and temperature): room temperature (22°C)-ad libitum; room temperature-dietary restriction (40%); high temperature (38°C)-ad libitum; and high temperature-dietary restriction. At the end of the 9th week, some oxidants (lipid hydroperoxide, total oxidant status, oxidative stress index) and some antioxidants (total antioxidant status, sulfhydryl

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Pei, Yangli, Yingjie Wu, and Yinghe Qin. "Effects of chronic heat stress on the expressions of heat shock proteins 60, 70, 90, A2, and HSC70 in the rabbit testis." Cell Stress and Chaperones 17, no. 1 (August 10, 2011): 81–87. http://dx.doi.org/10.1007/s12192-011-0287-1.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Tabassum, Rahila, Karim Gabol ., Masarrat Yousuf ., and M. Z. Khan . "Induced Effect of Pesticides on Pigeon (Liver, Kidney, Testis, Heart uscles and Fat)." Journal of Biological Sciences 3, no. 5 (April 15, 2003): 496–501. http://dx.doi.org/10.3923/jbs.2003.496.501.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Anoh, K. U. "Effect of baobab fruit pulp meal on testosterone concentration and gonadal and epididymal morphometry of rabbit bucks in a hot environment." Nigerian Journal of Animal Production 44, no. 3 (January 2, 2021): 98–103. http://dx.doi.org/10.51791/njap.v44i3.613.

Texto completo

Resumen

The aim of the study was to evaluate the effect of baobab fruit pulp meal on testosterone concentration and gonadal and epididymal morphometry of rabbit bucks during hot season in Nigeria. A total of 25 bucks of 10-12 months old were used. There were five (5) rabbits per group grouped as follows; T1 (control) and T2-T5 (Diets with graded levels of BFPM at 2.5%,3.5%, 4.5% and 5.5% inclusion levels, respectively). The experiment lasted for nine weeks. All management practices were duly observed. Three bucks were selected from each treatment group and slaughtered. The two testes of each of the ra

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Andersson, K., S. Kivivuori, and A. S. Korhonen. "Effect of the heat-transfer coefficient in ring-compression tests." Journal of Materials Processing Technology 62, no. 1-3 (November 1996): 10–13. http://dx.doi.org/10.1016/0924-0136(95)02141-8.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Mobaraki, Fahimeh, Masoumeh Seghatoleslam, Alireza Fazel, and Alireza Ebrahimzadeh-Bideskan. "Effects of MDMA (ecstasy) on apoptosis and heat shock protein (HSP70) expression in adult rat testis." Toxicology Mechanisms and Methods 28, no. 3 (November 5, 2017): 219–29. http://dx.doi.org/10.1080/15376516.2017.1388461.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Sahyoun, C., S. W. Kingman, and N. A. Rowson. "The Effect of Heat Treatment on Chalcopyrite." Physical Separation in Science and Engineering 12, no. 1 (January 1, 2003): 23–30. http://dx.doi.org/10.1080/1478647031000101296.

Texto completo

Resumen

The influence of conventional heat treatment and microwave radiation on chalcopyrite was investigated. There was a significant increase in the proportion of material recovered to magnetic fraction and magnetic susceptibility with conventional heating time. XRD analysis detected phase changes in conventional heat-treated chalcopyrite, which increases the magnetic susceptibility of the ore and enables its effective magnetic separation, which is impossible to achieve in its original state.With microwave treatment, the magnetic susceptibility increases and the proportion of material recovered to m

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Zheng, Mulian, Yanjuan Tian, and Litao He. "Analysis on Environmental Thermal Effect of Functionally Graded Nanocomposite Heat Reflective Coatings for Asphalt Pavement." Coatings 9, no. 3 (March 7, 2019): 178. http://dx.doi.org/10.3390/coatings9030178.

Texto completo

Resumen

The heat-reflective coating for asphalt pavement is a functional layer applied on pavement surfaces to reduce heat storage in the pavement via reflecting sunlight, thus inhibiting pavement temperature rise. The objective of this study was to analyze the environmental thermal effect of the self-developed reflective coating, namely, functionally graded nanocomposite reflective coatings, for asphalt pavement. The thermal effects of heat-reflective coatings were compared and analyzed based on field tests. A heating model of the atmosphere layer near the road surface was established. Moreover, the

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Obiukwu, Osita, Henry Udeani, and Progress Ubani. "The Effect of Heat Treatment on the Mechanical Properties of SAE 1035 Steel." International Journal of Engineering and Technologies 8 (August 2016): 32–43. http://dx.doi.org/10.18052/www.scipress.com/ijet.8.32.

Texto completo

Resumen

The effect of various heat treatment operations (annealing, normalizing, tempering) on mechanical properties of 0.35% carbon steel was investigated. The change in the value of endurance limit of the material as a result of the various heat-treatment operations were studied thoroughly. It was found that the specimens tempered at low temperature (200°C) exhibited the best fatigue strength. Microscope was used to characterize the structural properties resulting from different heat treatment processes. The results from the tensile tests impact tests and hardness tests showed that the mechanical pr

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Obiukwu, Osita, Henry Udeani, and Progress Ubani. "The Effect of Heat Treatment on the Mechanical Properties of SAE 1035 Steel." International Journal of Engineering and Technologies 8 (August 9, 2016): 32–43. http://dx.doi.org/10.56431/p-t11557.

Texto completo

Resumen

The effect of various heat treatment operations (annealing, normalizing, tempering) on mechanical properties of 0.35% carbon steel was investigated. The change in the value of endurance limit of the material as a result of the various heat-treatment operations were studied thoroughly. It was found that the specimens tempered at low temperature (200°C) exhibited the best fatigue strength. Microscope was used to characterize the structural properties resulting from different heat treatment processes. The results from the tensile tests impact tests and hardness tests showed that the mechanical pr

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Cheung, Stephen S., and Tom M. McLellan. "Heat acclimation, aerobic fitness, and hydration effects on tolerance during uncompensable heat stress." Journal of Applied Physiology 84, no. 5 (May 1, 1998): 1731–39. http://dx.doi.org/10.1152/jappl.1998.84.5.1731.

Texto completo

Resumen

—The purpose of the present study was to determine the separate and combined effects of aerobic fitness, short-term heat acclimation, and hypohydration on tolerance during light exercise while wearing nuclear, biological, and chemical protective clothing in the heat (40°C, 30% relative humidity). Men who were moderately fit [(MF); <50 ml ⋅ kg−1 ⋅ min−1maximal O2 consumption; n = 7] and highly fit [(HF); >55 ml ⋅ kg−1 ⋅ min−1maximal O2 consumption; n = 8] were tested while they were euhydrated or hypohydrated by ∼2.5% of body mass through exercise and fluid restriction the day preceding t

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Forn, Antonio, Maite T. Baile, Enric Martín, Javier Goñi, and I. Sarriés. "Heat Treatments Effect on A357 Components Produced by SSM." Solid State Phenomena 116-117 (October 2006): 181–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.181.

Texto completo

Resumen

The present work studies the effect the solution heat treatment, during artificial ageing and re-aging, has on the mechanical properties of an A357 aluminium alloy component formed by New Rheocasting. The effect that the evolution of silicon, during the solution treatment at various times, has on the mechanical properties was also examined. The mechanical properties were evaluated performing tensile tests, fractographical analysis and hardness tests. The microstructural characterization was made using optical and electronic microscopy.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Yu, Kai, Yao Wang, Yanxin Li, Jakov Baleta, Jin Wang, and Bengt Sundén. "Effect of phase change materials on heat dissipation of a multiple heat source system." Open Physics 17, no. 1 (December 31, 2019): 797–807. http://dx.doi.org/10.1515/phys-2019-0083.

Texto completo

Resumen

AbstractThis paper experimentally investigates heat dissipation of a heat pipe with phase change materials (PCMs) cooling in a multiple heat source system. Two heat sources are fixed at one end of the heat pipe. Considering that a heat sink cannot dissipate all the heat generated by two heat sources, various PCMs are used due to a large latent heat. Different materials in a container are wrapped outside of the middle heat pipe to take away the heat from the evaporation section. The experimental tests obtain temperature data of heat source, evaporation section, and energy storage characteristic

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Filipczak, Piotr Teodor, Wojciech Piglowski, Magdalena Glowala-Kosinska, Zdzislaw Krawczyk, and Dorota Scieglinska. "HSPA2 overexpression protects V79 fibroblasts against bortezomib-induced apoptosis." Biochemistry and Cell Biology 90, no. 2 (April 2012): 224–31. http://dx.doi.org/10.1139/o11-083.

Texto completo

Resumen

Human HSPA2 is a member of the HSPA (HSP70) family of heat-shock proteins, encoded by the gene originally described as testis-specific. Recently, it has been reported that HSPA2 can be also expressed in human somatic tissues in a cell-type specific manner. The aim of the present study was to find out whether HSPA2 can increase the resistance of somatic cells to the toxic effect of heat shock, proteasome inhibitors, and several anticancer cytostatics. We used a Chinese hamster fibroblast V79 cell line because these cells do not express the HSPA2 and cytoprotective HSPA1 proteins under normal cu

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

KOSTUGANOV, Arman B. "RESEARCH OF HEAT DISPOSAL EFFICIENCY IN RECUPERATIVE HEAT EXCHANGERS OF AUTONOMOUS VENTILATION UNITS." Urban construction and architecture 10, no. 1 (March 15, 2020): 36–46. http://dx.doi.org/10.17673/vestnik.2020.01.6.

Texto completo

Resumen

Full-scale tests of recuperative heat exchangers of autonomous ventilation units of a new design were carried out in order to determine the efficiency of heat recovery in them. As a result of the tests, it was found that the efficiency of heat recovery in such recuperative heat exchangers varies from 40 to 70 %, depending on the initial parameters of the supply and exhaust air. It was also found that in order to achieve the same heat recovery effect, it is advisable to use the construction of heat exchangers with corrugated mesh than the construction with corrugated plates because the first co

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Chaturapanich, G., S. Chaiyakul, V. Verawatnapakul, and C. Pholpramool. "Effects of Kaempferia parviflora extracts on reproductive parameters and spermatic blood flow in male rats." REPRODUCTION 136, no. 4 (October 2008): 515–22. http://dx.doi.org/10.1530/rep-08-0069.

Texto completo

Resumen

Krachaidum (KD, Kaempferia parviflora Wall. Ex. Baker), a native plant of Southeast Asia, is traditionally used to enhance male sexual function. However, only few scientific data in support of this anecdote have been reported. The present study investigated the effects of feeding three different extracts of KD (alcohol, hexane, and water extracts) for 3–5 weeks on the reproductive organs, the aphrodisiac activity, fertility, sperm motility, and blood flow to the testis of male rats. Sexual performances (mount latency, mount frequency, ejaculatory latency, post-ejaculatory latency) and sperm mo

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Gareh, Salim, and Zakaria Boumerzoug. "HEAT TREATMENT EFFECT ON THE CREEP OF INDUSTRIAL COPPER WIRE." Acta Metallurgica Slovaca 22, no. 3 (September 27, 2016): 181. http://dx.doi.org/10.12776/ams.v22i3.725.

Texto completo

Resumen

<p class="Default">Creep behavior of copper wire, produced by wiredrawing process in ENICAB Biskra, has been investigated by creep tests at 340°C under the stress 98,108 and 118 MPa. In this investigation, three samples have been tested: copper drawn wire non heat treated, and heat treated at 600°C and 700°C. Microstructure after the creep test was observed by optical microscopy to understand the rupture mechanism. We have found that the sample heat treated at 600 °C had a longer creep life. We have also deduced that the dislocation creep was the creep deformation mechanism of the drawn

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Abe, Fujio. "Behavior of Boron in 9Cr Heat Resistant Steel during Heat Treatment and Creep Deformation." Key Engineering Materials 345-346 (August 2007): 569–72. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.569.

Texto completo

Resumen

The effect of boron on microstructure evolution and creep deformation behavior has been investigated for a tempered martensitic 9Cr-3W-3Co-0.2V-0.05Nb steel at 650oC. Creep tests were carried out at 650oC for up to about 6 x 104 h. The addition of boron retards the onset of acceleration creep at low stress and long time conditions, which results in lower minimum creep rate and longer time to rupture. The addition of boron also retards the Ostwald ripening of M23C6 carbides near prior austenite grain boundaries (PAGBs) during creep. The retardation of the onset of acceleration creep results fro

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Zheng, Yi, Yao Hui Liu, Yu Lai Song, Jia’an Liu, Ling Nan Kong, and Yan Liang. "Effect of Welding Heat Input on Microstructure and Softening Behavior of 5CrMoV Steel." Key Engineering Materials 735 (May 2017): 42–48. http://dx.doi.org/10.4028/www.scientific.net/kem.735.42.

Texto completo

Resumen

Three different heat input combinations for the medium carbon alloy steels 5CrMoV are compared in terms of the heat affected zone of microstructures, hardness, and tensile properties. The microstructures in the heat affected zone are predominately ferrite and bainite, with grain size variation in different sub-zones and different heat input. Analyses of the micro-hardness profiles indicated that softening phenomenon occurs in the entire heat affected zone, and high heat input resulted in the greatest decrease in hardness. The results of the tensile tests reveal tensile properties of the heat a

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Naheed, Kishwar, Humaira Ali, Fareeha Mushtaq, Muhammad Saad Abdullah, Maria Yousaf, Noreen Anwar, and Talha Laique. "Effects of Microwave Oven Exposed Diet on Animal Weight and Testicular Tissue and Relative Role of Mentha Piperita." Pakistan Journal of Medical and Health Sciences 15, no. 9 (September 30, 2021): 2352–54. http://dx.doi.org/10.53350/pjmhs211592352.

Texto completo

Resumen

Background: Usage of electronic gadgets like microwave oven is increasing day by day that heats the food by exposing it to electromagnetic radiations which has many hazardous effects on human health including fertility. Aim: To find the effects of microwave oven exposed diet on weight and testis of mice along with protective effects of Mentha Piperita and Melatonin Study Design: Randomized control trial. Methodology: Adult male mice (n=32) were divided into four groups. Control group (G1) received standard pellets prepared for mice. Second group (G2) was given mice pellets exposed to microwave

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Paul, Catriona, Alison A. Murray, Norah Spears, and Philippa T. K. Saunders. "A single, mild, transient scrotal heat stress causes DNA damage, subfertility and impairs formation of blastocysts in mice." REPRODUCTION 136, no. 1 (July 2008): 73–84. http://dx.doi.org/10.1530/rep-08-0036.

Texto completo

Resumen

Infertility represents a major clinical problem and 50% of cases are attributable to the male partner. Testicular function is temperature dependent, and in both man and mouse the position of the testes in the scrotum ensures that they are kept at between 2 and 8 °C below core body temperature. We used a mouse model to investigate the impact of a single, transient, mild, scrotal heat stress (38, 40 or 42 °C for 30 min) on testicular function, sperm DNA integrity and embryo survival. We detected temperature-dependent changes in testicular architecture, number of apoptotic cells and a significant

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Boumerzoug, Zakaria, Zakaria Boumerzoug, and Vincent Ji. "Heat Treatments Effect on the Mechanical Properties of Industrial Drawn Copper Wires." Advanced Materials Research 811 (September 2013): 9–13. http://dx.doi.org/10.4028/www.scientific.net/amr.811.9.

Texto completo

Resumen

In this present investigation, the mechanical properties of industrial drawn copper wires have been studied by creep tests, tensile tests and hardness Vickers. The effect of prior heat treatments at 500°C for different time on the drawn wires behavior was the main goal of this investigation. We have found that these heat treatments influenced the creep behavior of drawn wires and recorded shape curves. The creep tests were applied under ambient atmosphere at 240 °C. The creep duration before rupture decreased with the prior heat treatment time. The creep tests results were confirmed by tensile

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Djurumana, Yohana, Reny I’tishom, and Bambang Purwanto. "Pemberian Ekstrak Rumput Kebar (Biophytum petersianum Klotzsh) Dapat Meningkatkan Berat Testis Mencit Model Diabetes Mellitus." Jurnal Penelitian Kesehatan "SUARA FORIKES" (Journal of Health Research "Forikes Voice") 11, no. 3 (May 18, 2020): 324. http://dx.doi.org/10.33846/sf11320.

Texto completo

Resumen

Background: In addition to the influence of diabetes on male reproduction lowers testosterone levels of FSH and LH, the second number of hormones is reduced will interfere with the process of spermatogenesis. If the spermatogenesis process is interrupted then the number of germ cells decreases, this will cause a decrease in the weight of the testes. Objective: To analyze the effect of extract grass administration to the weight of the testicles diabetes Mellitus mice between the treatment group and the control. Methods: The research used DM male mice which is divided into 5 groups each consisti

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Holets, Lesya M., Anne Grissell, Sudhakar Jakkaray, Ramappa Chakrasali, Gunda Georg, Mary Zelinski, and Joseph S. Tash. "Effect of H2-Gamendazole on Rapid HSF1 Expression and Interaction with Heat Shock Proteins in Rat Testis In Vivo and Primary Sertoli Cells." Biology of Reproduction 83, Suppl_1 (November 1, 2010): 531. http://dx.doi.org/10.1093/biolreprod/83.s1.531.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

MAGALHÃES, APARECIDA SILVA, CHARLES HENRIQUE XAVIER MORAIS MAGALHÃES, LEONARDO BARBOSA GODEFROID, GERALDO LÚCIO DE FARIA, MILTON SERGIO FERNANDES DE LIMA, JULIANE CRUZ, and RODNEI BERTAZZOLI. "Effect of PWHT on Laser-Welded Duplex Stainless Steel." Welding Journal 99, no. 7 (July 1, 2020): 185s—202s. http://dx.doi.org/10.29391/2020.99.018.

Texto completo

Resumen

The welded joints of duplex stainless steels (DSSs) have been widely used in petrochemical, nuclear, pulp, and paper industries. Welds require a good, superficial finishing and a combination of mechanical and corrosion properties in these types of high-quality, demanding applications. Even though laser welding promotes narrow weld beads and a small heat-affected zone, when it is applied to DSSs, it can produce dangerous microstructural discontinuities. In this context, the effects of subsequent heat treatments on the microstructure, corrosion resistance, microhardness, and tensile proper-ties

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Xavier, Guadalupe Carvalho, Pierre Castro Soares, Valdemiro Amaro da Silva Junior, Sandra Maria de Torres, Ana Cristina Marinho Maymone, Rosana Nogueira de Morais, Cristiane Scavuzzi Moura, and Maria Madalena Pessoa Guerra. "Effect of Dietary Selenium and Vitamin E Supplementation on Testicular Morphology and Serum Testosterone Concentration in Goats Following Scrotal Insulation." Acta Scientiae Veterinariae 44, no. 1 (March 19, 2018): 8. http://dx.doi.org/10.22456/1679-9216.81171.

Texto completo

Resumen

Background: Heat directly applied to the testis has been providing information regarding the damage triggering mechanisms on spermatogenesis and possible treatments to prevent testicular changes. Testis submitted to heat-shock have inhibition of the local antioxidant defense mechanisms against lipid peroxidation and free radicals. Vitamin E and Selenium protect biological membranes against free radicals to prevent membrane lipid peroxidation. The current assay evaluated the effect of dietary supplementation with Selenium and Vitamin E on testicular parenchyma and testosterone levels of goats s

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Atalay, Ozgur, Senem Kursun Bahadir, and Fatma Kalaoglu. "An Analysis on the Moisture and Thermal Protective Performance of Firefighter Clothing Based on Different Layer Combinations and Effect of Washing on Heat Protection and Vapour Transfer Performance." Advances in Materials Science and Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/540394.

Texto completo

Resumen

Fabric assemblies for firefighting clothing have been tested for heat protection and comfort. The constituent materials and fabric structures have been specifically selected and tailored for firefighters’ clothing. In order to do this, four types of outer shell fabrics, four types of moisture barrier fabrics, and four types of heat barriers with different weights and material compositions were used to make a multilayered fabric assembly. Heat transfer (flame), heat transfer (radiant), and water vapour resistance tests were conducted according to the latest EN469 test standard which also recomm

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Fiorini, Celine, Xavier Decrouy, Norah Defamie, Dominique Segretain та Georges Pointis. "Opposite regulation of connexin33 and connexin43 by LPS and IL-1α in spermatogenesis". American Journal of Physiology-Cell Physiology 290, № 3 (березень 2006): C733—C740. http://dx.doi.org/10.1152/ajpcell.00106.2005.

Texto completo

Resumen

The gap junction proteins, connexins (Cxs), are present in the testis, and among them, Cx43 play an essential role in spermatogenesis. In the present study, we investigated the testicular expression and regulation of another Cx, Cx33, previously described as a negative regulator of gap junction communication. Cx33 mRNA was present in testis and undetectable in heart, liver, ovary, and uterus. In the mature testis, Cx33 was specifically immunolocalized in the basal compartment of the seminiferous tubules, whereas Cx43 was present in both seminiferous tubule and interstitial compartments. During

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

van, Zelst SJ, JL Zupp, DL Hayman, and BP Setchell. "X-Y chromosome dissociation in mice and rats exposed to increased testicular or environmental temperatures." Reproduction, Fertility and Development 7, no. 5 (1995): 1117. http://dx.doi.org/10.1071/rd9951117.

Texto completo

Resumen

Heating the testes, scrota and tails of mice and rats by immersion in a water bath at 42 degrees C for 20 min caused an increased percentage of X-Y univalents in meiotic preparations made after 6 and 12 days respectively. It was also confirmed that exposing mice of a cool-adapted strain to an environment at 33 degrees C for 5 days resulted in an increase in the percentage of X-Y and autosomal univalents in meiotic preparations made after a recovery period of 2 days. Mice of a strain adapted to living at 33 degrees C also showed a higher rate of X-Y dissociation than control cool-adapted mice,

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!