Готові списки джерел за темами / Sheep Reproduction

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  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій
  6. Звіти організацій

Добірка наукової літератури з теми "Sheep Reproduction"

Автор: Grafiati
Опубліковано: 4 червня 2021
Оновлено: 31 січня 2023

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Статті в журналах з теми "Sheep Reproduction"

1

Joshi, Purushotam. "NUTRITION AND REPRODUCTION IN SHEEP." FOOD & AGRIBUSINESS MANAGEMENT 3, no. 2 (2022): 48–52. http://dx.doi.org/10.26480/fabm.02.2022.48.52.

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Анотація:
High nutrition, but not overfeeding, has a positive effect on ewe reproductive capability in terms of the number of estrous cycles, length of the breeding season, greater ovulation rate, and improved lambing %. Copper deficiency hurts lambing percentage and lamb health. Manganese is required for the ovarian activity to be maintained. Protein is necessary for sheep for optimum sperm capacitation, conception rate, pregnancy, and reduced abortions. Protein insufficiency causes lower feed intake, poorer feed utilization, lower growth rate, lower milk output, and lower wool production. A possible r
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2

Haresign, W. "Reproduction in Sheep." Livestock Production Science 14, no. 4 (June 1986): 386–87. http://dx.doi.org/10.1016/0301-6226(86)90018-7.

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3

Dzakuma, J. M., and D. L. Harris. "Computer Modeling of Sheep Reproduction: II. Accelerated Reproduction in Sheep." Journal of Animal Science 67, no. 9 (September 1, 1989): 2212–21. http://dx.doi.org/10.2527/jas1989.6792212x.

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4

Brien, Forbes. "Foreword to ‘Sheep Reproduction’." Animal Production Science 54, no. 6 (2014): iv. http://dx.doi.org/10.1071/anv54n6_fo.

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5

Haresign, W. "Controlling reproduction in sheep." BSAP Occasional Publication 14 (January 1990): 23–37. http://dx.doi.org/10.1017/s0263967x00002020.

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AbstractIntravaginal progestagen pessaries + pregnant mare's serum gonadotrophin (PMSG) for controlling the oestrous cycle and for inducing out-of-season breeding have been commercially available for many years. However, extremely good mating management is required if acceptable results are to be achieved. More recently the role of the pineal hormone, melatonin, in the regulation of seasonal breeding has been recognized, and this has led to the development of slow-release formulations for use under farm conditions. Early indications are that such preparations can advance the breeding season by
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6

DEAC, Alexandru Marius, Adriana Sebastiana MUSCĂ, Marius Gavril AIPĂTIOAIE, Viorica COŞIER, and Marius ZĂHAN. "Methods of Improving Reproductive Parameters in Sheep and The Major Genes Associated with Prolificacy: A Review." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies 1, no. 79 (May 11, 2022): 7. http://dx.doi.org/10.15835/10.15835/buasvmcn-asb:2021.0020.

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Farm profitability is heavily influenced by reproductive capacity. Fertility, prolificacy, and fecundity are all indicators of reproductive efficiency. In sheep with high economic value, prolificacy is a key reproduction parameter (Notter, 2008). Because most sheep breeds are monotocous, similar to Mouflon wild sheep (Garel et al., 2005), improving fecundity is a serious concern (Tang et al., 2019). This review aims to study genes and the genetic means of improving sheep reproduction parameters. Numerous mutations in the transforming growth factor (TGF) superfamily have been reported to influe
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7

Rosa, H. J. D., and M. J. Bryant. "Seasonality of reproduction in sheep." Small Ruminant Research 48, no. 3 (June 2003): 155–71. http://dx.doi.org/10.1016/s0921-4488(03)00038-5.

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8

Matoušek, J. "Genetics of reproduction in sheep." Animal Reproduction Science 11 (January 1986): 235–36. http://dx.doi.org/10.1016/0378-4320(86)90125-9.

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9

HE, MINGFENG, QIU-HUI PAN, and SHUANG WANG. "FINAL STATE OF ECOSYSTEM CONTAINING GRASS, SHEEP AND WOLVES WITH AGING." International Journal of Modern Physics C 16, no. 01 (January 2005): 177–90. http://dx.doi.org/10.1142/s0129183105007017.

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This paper describes a cellular automata model containing movable wolves, sheep and reproducible grass. Each wolf or sheep is characterized by Penna bitstrings. In addition, we introduce the energy rule and the predator–prey mechanism for wolf and sheep. With considering age-structured, genetic strings, minimum reproduction age, cycle of the reproduction, number of offspring, we get three possible states of a predator–prey system: the coexisting one with predators and prey, the absorbing one with prey only, and the empty one where no animal survived. In this paper, we mainly discuss the effect
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10

Qiu, Xiaoyan, Xiong Xiao, Nan Li, Wenhui Ling, Mingyu Wang, and Yuemin Li. "Association of steroid 17-alpha-hydroxylase/17,20 lyase (CYP17) single nucleotide polymorphism (SNP) 628 and dopamine receptor D2 (DRD2) SNP939 genotypes with sheep reproductive performance." Reproduction, Fertility and Development 31, no. 4 (2019): 743. http://dx.doi.org/10.1071/rd18069.

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In a previous study we investigated the association between two single nucleotide polymorphism (SNP) genotypes, namely steroid 17-alpha-hydroxylase/17,20 lyase (CYP17) SNP628 and dopamine receptor D2 (DRD2) SNP939, with two temperaments (calm and nervous) in Australian Merino sheep and concluded that the DRD2 SNP939 T/T genotype combined with the CYP17 SNP628 G/G genotype is associated with a calm temperament and could be used as a potential marker for calm sheep, whereas the DRD2 SNP939C allele combined with the CYP17 SNP628 A/A genotype is associated with a nervous temperament and could be u
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Дисертації з теми "Sheep Reproduction"

1

Nassiri, Mohammad Taghi Beigi. "Aspects of prolificacy in Cambridge sheep." Thesis, Bangor University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321435.

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2

Ibraheem, Majid. "The manipulation of seasonality of reproduction in sheep." Thesis, University of Aberdeen, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332379.

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Анотація:
The phenomenon of seasonability of reproduction restricts the ewe to only one lambing around the same time every year, which in turn prevents an even supply of lamb meat to the market. The long term objective of the current study was to develop two systems of early and summer lambing using alternative techniques for the manipulation of sheep production in an attempt to produce high quality lamb throughout the year. In recent years, major advances in our knowledge of seasonality of reproduction have been the recognition of the integral role of the pineal gland and its indoleamine melatonin in t
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3

Archer, Zoe Anne. "Neuroendocrine control of appetite and reproduction in sheep." Thesis, University of Aberdeen, 2001. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602029.

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Анотація:
Reproductive neuroendocrine activity and appetite are modulated at the hypothalamus by both nutritional status and photoperiod in the seasonal animal. The objectives of this work were (1) to measure circulating hormones and/or metabolites that relay information about peripheral nutritional status to the hypothalamus, (2) to identify which hypothalamic neuropeptides and receptors that are responsive to photoperiodic and nutritional feedback and (3) to establish which changes in peripheral signals and/or hypothalamic neuropeptides are associated with alterations in the activity of the reproducti
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4

Singh, Inderjeet. "Embryonic survival in adrenal hyperactivity in sheep." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386839.

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5

Ferasyi, Teuku Reza. "Mathematical model of the reproductive endocrine system in male sheep." University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0080.

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[Truncated abstract] The activity of the reproductive endocrine axis is the result of interactions among many organs and tissues, particularly the hypothalamus, pituitary gland and gonad. However, it depends on more than the communication between anatomical structures because it is also affected by genotype, internal factors (e.g., metabolic inputs) and external factors (e.g., photoperiod, socio-sexual cues, stress, nutrition). This multifactorial complexity makes it difficult to use animal experimentation to investigate the pathways and mechanisms involved. Therefore, in this study, I have tu
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6

Holmberg, Bradford J. "Influence of the vagus nerve and urocortin on the nutrition-reproduction axis of the ovine /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3074407.

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7

Tempest, Louisa-Jayne. "Parasites and the costs of reproduction in Soay sheep." Thesis, University of Stirling, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720356.

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8

Hawken, Penelope Alison Rhian. "The role of socio-sexual cues in sheep reproduction." Thesis, University of Newcastle Upon Tyne, 2006. http://hdl.handle.net/10443/1660.

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Анотація:
Exposure of previously isolated anoestrous ewes to a ram induces an almost instantaneous rise in luteinising hormone (LH) pulse frequency. This physiological response, a phenomenon coined 'the ram effect' is commonly sufficient to override the seasonal suppression of the hypothalamic-pituitary axis and induce a synchronous first ovulation. The objective of the first series of experiments in this thesis was to develop a nonpharmacological method of oestrus synchronisation, using socio-sexual cues, for natural mating of mule ewes during the breeding season. Initially two experiments were conduct
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9

Bancroft, David. "Genetic variation and fitness in Soay sheep." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338112.

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Fray, Martin Dennerley. "Gonadotrophin release in post parturient cattle and sheep." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314751.

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Книги з теми "Sheep Reproduction"

1

Gordon, Ian R. Controlled reproduction in sheep and goats. Wallingford, Oxon, UK: CAB International, 1997.

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2

Clariget, Raquel Perez. Studies on seasonal variation in testicular function in Corriedale rams with special emphasis on nutritional effects. Uppsala: Sveriges Lantbruksuniversitet, 1998.

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3

Kelly, John P. Factors affecting superovulation in cattle and sheep. Dublin: University College Dublin, 1995.

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4

Knights, Marlon. Reproductive management in the ewe flock by induction or synchronization of estrus. Morgantown, WV: West Virginia University, Davis College of Agricultural, Forestry and Consumer Sciences, WV Agriculture and Forestry Experiment Station, 2004.

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5

Lawson, Laura. Managing your ewe and her newborn lambs. Culpeper, Va: LDF Publications, 1993.

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6

O'Neill, Daniel J. Studies related to the cryopreservation of ram spermatozoa. Dublin: University College Dublin, 1998.

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7

Carlsson, Ulla. Pestivirus infections in pregnant sheep and cattle: Studies on epidemiology, reproduction, and prospects for control. Uppsala: Sveriges Lantbruksuniversitet, 1994.

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8

Byrne, William. An evaluation of nutritional strategies and sire breed for mid-season lamb production. Dublin: University College Dublin, 1999.

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9

Roldán, Jorge Cassinello. El arrui sahariano: Un caprino ancestral en Almería. [Almería]: Instituto de Estudios Almerienses, Diputación de Almería, 1998.

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10

Byrne, Garret P. Effects of freezing rate of ram semen on subsequent fertility in vivo and in vitro. Dublin: University College Dublin, 1998.

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Частини книг з теми "Sheep Reproduction"

1

Jainudeen, M. R., H. Wahid, and E. S. E. Hafez. "Sheep and Goats." In Reproduction in Farm Animals, 172–81. Baltimore, Maryland, USA: Lippincott Williams & Wilkins, 2016. http://dx.doi.org/10.1002/9781119265306.ch12.

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2

Kumar, Davendra, Kalyan De, Veerasamy Sejian, and S. M. K. Naqvi. "Impact of Climate Change on Sheep Reproduction." In Sheep Production Adapting to Climate Change, 71–93. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4714-5_3.

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3

Loi, Pasqualino, and Grazyna Ptak. "Gene Expression/Phenotypic Abnormalities in Placental Tissues of Sheep Clones: Insurmountable Block in Cloning Progress?" In Epigenetics and Human Reproduction, 85–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14773-9_4.

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4

Dufourny, Laurence, and Isabelle Franceschini. "Plasticity of Neuroendocrine Mechanisms Regulating Seasonal Reproduction in Sheep." In Neuroendocrine Clocks and Calendars, 103–18. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-55643-3_5.

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5

Robertson, Susan, and Michael Friend. "Strategies to Ameliorate Heat Stress Effects on Sheep Reproduction." In Climate Change and Livestock Production: Recent Advances and Future Perspectives, 175–83. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-9836-1_15.

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6

Dattena, M., I. Mayorga, L. Mara, M. Gallus, G. Meloni, A. Cabiddu, and S. Salaris. "An example of reproduction management in organic sheep farming." In Animal farming and environmental interactions in the Mediterranean region, 223–27. Wageningen: Wageningen Academic Publishers, 2012. http://dx.doi.org/10.3920/978-90-8686-741-7_27.

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Sheldrick, E. L., and A. P. F. Flint. "Secretion of Oxytocin by the Corpus Luteum and its Role in Luteolysis in the Sheep." In Endocrinology and Physiology of Reproduction, 211–19. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4899-1971-7_17.

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8

Russel, A. J. F. "The Application of Real-Time Ultrasonic Scanning in Commercial Sheep, Goats and Cattle Production Enterprises." In Diagnostic Ultrasound and Animal Reproduction, 73–87. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-017-1249-1_7.

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9

Viñoles-Gil, Carolina, Antonio Gonzalez-Bulnes, Graeme B. Martin, Francisco Sales Zlatar, and Sebastiano Sale. "Sheep and Goats." In Practical Atlas of Ruminant and Camelid Reproductive Ultrasonography, 181–210. Ames, Iowa, USA: John Wiley & Sons, 2016. http://dx.doi.org/10.1002/9781119265818.ch11.

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Dunlap, Kathrin A. "Sheep." In Encyclopedia of Reproduction, 656–66. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-809633-8.20523-2.

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Тези доповідей конференцій з теми "Sheep Reproduction"

1

Lobachova, I. V., and S. L. Drozd. "The influence of taking into account the ewes age to the sheep flocks reproduction indicators calculating." In Current problems of modern animal husbandry. �������� ������������ �������� ������ "������-����" - ������������ ����������-���������� ����� � ���������, 2021. http://dx.doi.org/10.33694/978-966-1550-33-8-2021-0-0-91-93.

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2

Lawson, Peter J., Bihe Hu, Brittany T. Fasy, Carola Wenk, and J. Quincy Brown. "Quantifying prostate cancer morphology in 3D using light sheet microscopy and persistent homology (Conference Presentation)." In Diseases in the Breast and Reproductive System IV, edited by Melissa C. Skala and Paul J. Campagnola. SPIE, 2018. http://dx.doi.org/10.1117/12.2290994.

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3

Devia, P., Carlos A. Alvarez M, N. Alejandro, L. Hurtado, and A. Jairo. "Reproduction of the music contained in a music sheet using MATLAB®." In 2015 20th Symposium on Signal Processing, Images and Computer Vision (STSIVA). IEEE, 2015. http://dx.doi.org/10.1109/stsiva.2015.7330404.

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4

Ali Tribaldos, Jicmat, and Chiradeep Sen. "Evolutionary Grasp Planning for Sheet Metal Parts With Multi-Type Grippers." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-71632.

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Abstract Grasping sheet metal objects for manufacturing operations requires custom-made robot-mounted end-effectors to grip the parts. Modern end-effectors use multi-type grasp where a combination of gripper types such as suction cups, magnets, and fingers may be used. This paper presents a genetic algorithm-based approach of grasp design automation. The algorithm first generates an option space of possible grasping locations by analyzing the geometry of the sheet metal part and then uses a genetic algorithm to optimize the grasp using up to five magnets and suction cups. The algorithm include
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5

Pukhova, Ekaterina, and Vladislav Vereshchagin. "Compensation of defects in printing process with histogram methods." In 10th International Symposium on Graphic Engineering and Design. University of Novi Sad, Faculty of technical sciences, Department of graphic engineering and design,, 2020. http://dx.doi.org/10.24867/grid-2020-p41.

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A method of image preparation for printing reproduction is suggested. This method allows to automatically compensate transformations that occur during reproduction, by analyzing a histogram of test chart image and based on it, creating a compensation pre-correction function. It also takes into consideration the visual perception of images. Pre-correction function is applied to images at the prepress stage after all other corrections. It is aimed to compensate defects, occurring at the printing stage, caused by the process of tone value increase and restriction of tonal range reproduction. It i
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Cassilly, Ryan T., Haley A. Bunting, Brian Jin, Christopher S. Ahmad, Louis U. Bigliani, William N. Levine, and Thomas R. Gardner. "Failure Properties of the Simian Inferior Glenohumeral Ligament." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53520.

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Several animal models of the shoulder are currently in use, including the rat, sheep and goat, as a means to model shoulder pathology[1]. Cynomolgus monkeys have served as nonhuman primate models in several studies including monkey models of menopause [2], reproductive support structures [3] and the knee joint[4]. Anatomical comparisons of simian and human shoulders have demonstrated that the simian shoulder is similar to that of the human in both musculature and bony structures[5]. A preliminary study concluded that there exists a high degree of similarity between the simian and human glenohu
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Tabata, Soichiro, Yasuhiro Sasao, and Kiyoshi Segawa. "Experimental and Numerical Investigations of the Effects of Real Shape Modeling and Non-Equilibrium Condensation Modeling on the Flow Pattern in Steam Turbine." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-01754.

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Abstract This study presents the results of measurements in a scaled model turbine test rig operated at Mitsubishi Hitachi Power Systems, Ltd. In this paper, the flow pattern obtained by traverse measurements is compared with the results of CFD. In order to investigate the flow field in the low pressure steam turbine, the tests are carried out using a test turbine (4 stages) of × 0.33 scale. The velocity and pressure fields are evaluated by traverse measurements. The corresponding CFD are performed by ANSYS CFX. Generally, shroud and stub are used in last stage rotating blades of industrial st
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Lutfiasari, Dessy, and Galuh Pradian Yanuaringsih. "The Effect of Soybean-Palm Date Milk Consumption on Hemoglobin Level among Adolescent." In The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.05.61.

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Background: Anemia is a problem that affects reproductive health among adolescent. High incidence of anemia among adolescents still needs an attention. One of which is the consumption of foods containing iron (Fe). The purpose of this study was to examine the effect of soybean-date palm (kurma) milk consumption on hemoglobin (Hb) levels among adolescent girls. Subjects and Method: A quasi experiment was conducted at the Al Ma’ruf Islamic Boarding School in Kediri, East Java, from March to July 2020. The samples obtained were 28 people who had Hb below 12 g% and were not menstruating. The sampl
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Звіти організацій з теми "Sheep Reproduction"

1

Bazer, Fuller W., Arieh Gertler, and Elisha Gootwine. Role of Placental Lactogen in Sheep. United States Department of Agriculture, January 2001. http://dx.doi.org/10.32747/2001.7574339.bard.

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Central problems in sheep and dairy cattle production are reproductive failure due to embryonic/fetal mortality and low birth weights, especially in prolific breeds, and reduced milk yields which adversely affect neonatal survival and economy of production. The sheep placenta expresses lactogenic (ovine placental lactogen, oPL) and somatogenic (ovine placental growth hormone, oGH) hormones. Our research has focused on the biological roles of oPL and oGH in function of the uterine endometrium during gestation and the mammary gland during pregnancy and lactation. Major conclusions were that: ( 1
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Spencer, Thomas E., Elisha Gootwine, Arieh Gertler, and Fuller W. Bazer. Placental lactogen enhances production efficiency in sheep. United States Department of Agriculture, December 2005. http://dx.doi.org/10.32747/2005.7586543.bard.

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The key objectives of this BARD project were to: (1) study long-term effects of immunization of prepubertal ewes against recombinant ovine placental lactogen (roPL) on subsequent birth weights of their lambs and their milk production; (2) optimize the anti-roPL immunization protocol using adjuvant preparations acceptable to producers and regulatory agencies; and (3) determine the physiological mechanism(s) whereby immunization against oPL increases fetal growth and development and mammogenesis. These objectives were based on key findings from a previous BARD project that: (a) immunization of e
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Brosh, Arieh, David Robertshaw, Yoav Aharoni, Zvi Holzer, Mario Gutman, and Amichai Arieli. Estimation of Energy Expenditure of Free Living and Growing Domesticated Ruminants by Heart Rate Measurement. United States Department of Agriculture, April 2002. http://dx.doi.org/10.32747/2002.7580685.bard.

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Research objectives were: 1) To study the effect of diet energy density, level of exercise, thermal conditions and reproductive state on cardiovascular function as it relates to oxygen (O2) mobilization. 2) To validate the use of heart rate (HR) to predict energy expenditure (EE) of ruminants, by measuring and calculating the energy balance components at different productive and reproductive states. 3) To validate the use of HR to identify changes in the metabolizable energy (ME) and ME intake (MEI) of grazing ruminants. Background: The development of an effective method for the measurement of
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Egypt: Encourage journalists to cover reproductive health. Population Council, 2000. http://dx.doi.org/10.31899/rh2000.1029.

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To raise public awareness of reproductive health (RH) issues, the Population Council’s Frontiers project and the Futures Group’s Policy project jointly organized four press briefings and provided background materials to key journalists from Arabic newspapers and magazines. From May 1999 to June 2000, project staff worked closely with 20 Egyptian journalists, including editors of women’s pages and senior editors. The press briefings covered youth, marriage patterns, contraceptive technology, and menopause. The press kit prepared for each briefing contained fact sheets, reference materials, a co
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