scholarly journals Fertility rate of short-term progestagen pretreated ewes in relation to breed: A field study

2018 ◽  
Vol 68 (1) ◽  
pp. 35
Author(s):  
S. PAPADOPOULOS ◽  
C. DELIGIANNIS ◽  
E. K. THEODOSIADOU ◽  
D. KANTAS ◽  
TH. LAINAS ◽  
...  
Keyword(s):  
Field Study ◽  
Artificial Insemination ◽  
Transition Period ◽  
Fertility Rate ◽  
Short Term ◽  
Serum Progesterone ◽  
Blood Samples ◽  
The Common ◽  
Natural Mating

The effect of short-term instead of long-term progestagen treatment on fertility of Karagouniko and Chios ewes, after natural mating or artificial insemination, was investigated. Two experiments were performed during the transition period from anοestrous to the breeding season. In the 1st experiment (natural mating, NM), Karagouniko and Chios ewes were randomly allocated into 3 groups, that were KLM (long-term progestagen treatment; n=35), KSM (short-term progestagen treatment; n=34), KSP (short-term progestagen treatment; prostaglandin; n=35) and CLM (n=40), CSM (n=35), CSP (n=38), respectively. In the 2nd experiment (intracervical artificial insemination, AI) Karagouniko and Chios ewes were randomly allocated into 3 groups, that were KLA (long-term progestagen treatment; AI at 54h; n=50), KSA1 (short-term progestagen treatment; AI at 54h; n=20), KSA2 (short-term progestagen treatment; AI at 48h; n=28) and CLA (n=40), CSA1 (n=16), CSA2 (n=20), respectively. At sponges’ removal (d0) all ewes received 400 IU eCG. Ten rams served NM, while for AI fresh diluted semen was used. Pregnancy diagnosis was performed, 45-50 days later. Ιn the 1st experiment, blood samples were collected, daily for 5 days, starting on d0, for serum progesterone assessment. Conception rate in Karagouniko ewes after NM was higher (P<0.05) in KSM (35.29%) compared to KLM (17.14%) group, but did not differ with KSP (28.57%) group, while after AI it was higher (P<0.05) in KLA (42.00%) or KSA1 (40.00%) compared to KSA2 (14.29%) group. In Chios ewes no significant differences were observed between groups either after NM [CLM (45.00%), CSM (36.84%), CSP (34.29%)] or after AI [CSA1 (50.00%), CSA2 (50.00%), CLA (45.00%)]. No significant differences were observed after NM or after AI in the litter size in both breeds. These results indicate that short-term progestagen treatment for oestrus synchronization could be applied in indigenous Greek sheep breeds, resulting in equal (Chios) or improved fertility (Karagouniko) than the common long-term one. Also, the fertility rate in ewes subjected to short-term progestagen treatment depends on the time of AI in relation to breed.

COMPARISON OF ARTIFICIAL INSEMINATION AND NATURAL MATING ON REPRODUCTIVE PERFORMANCE OF FIVE STRAINS OF SHEEP DURING THE ANESTROUS SEASON IN AN INTENSIVE SYSTEM

1979 ◽  
Vol 59 (4) ◽  
pp. 675-683 ◽  
Author(s):  
A. J. HACKETT ◽  
H. A. ROBERTSON ◽  
E. K. INSKEEP ◽  
J. N. B. SHRESTHA ◽  
M. S. WOLYNETZ
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Hormone Treatment ◽  
Corpora Lutea ◽  
Blood Samples ◽  
Natural Mating ◽  
Main Effects ◽  
Mating Method ◽  
Intensive System

Synchronized estrus and ovulation were induced during the anestrous season (April–May 1974) in 373 ewes of three synthetic (one sire and two dam) strains and two unselected (Suffolk and Finnish Landrace) purebred strains by treatment with 30 mg fluorogestone acetate (FGA) impregnated in polyurethane intravaginal sponges for 12 days. Following sponge removal each ewe received 500 IU pregnant mares’ serum gonadotrophin (PMSG) IM. Of these, 167 were bred by artificial insemination (AI) at 48 and 60 h post sponge removal with 0.2 ml raw unextended semen collected by electroejaculation (EE). Five days after AI, ewes were exposed to a follow up ram for 16 days for subsequent mating if a second estrus occurred. The remaining 206 were exposed to rams for a period of 22 days for natural mating. Blood samples were collected from 69 ewes, 9, 19 and 27 days post sponge removal and analyzed for progesterone to ascertain if corpora lutea were formed and whether the ewes recycled. The age of ram by mating method interaction significantly affected both fertility and fecundity mainly because some of the younger rams lacked libido and experience for natural mating. There were no significant differences in prolificacy due to any of the main effects tested. Among the 69 ewes examined for progesterone levels, 93% had formed corpora lutea after hormone treatment and 16% recycled. Only 16 of the 255 ewes that did not conceive to the synchronized estrus lambed to the subsequent estrus.

scholarly journals The Effect of A PRID®Delta-Based Estrus Synchronization Protocol On Pregnancy Rates In Cows With No Estrus Symptoms

2022 ◽  
Author(s):  
Murat Can Demir ◽  
Cihan Kaçar ◽  
Umut Çağın Arı ◽  
Semra Kaya ◽  
Oğuz Merhan ◽  
...  
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Prostaglandin F2α ◽  
Pregnancy Rates ◽  
Dominant Follicle ◽  
Serum Progesterone ◽  
Blood Samples ◽  
Follicle Diameter ◽  
Follicle Size ◽  
Equine Chorionic Gonadotropin

Abstract The present study aimed to determine the effects of progesterone-based gonadotropin-releasing hormone (GnRH), prostaglandin F2α (PGF2α), and equine chorionic gonadotropin (eCG) injections on progesterone profiles and pregnancy rates in cows with no estrus symptoms within 60 days after parturition. A total of 80 cows were included in the study. All animals had the progesterone-releasing device PRID®Delta placed intravaginally for nine days with an injection of GnRH. On the eighth day, PGF2α was injected, and PRID®Delta was removed from the vagina on day nine. Artificial insemination was carried out 60 hours after PRID®Delta removal. In half of the animals (n = 40), 600 IU of eCG was injected when PRID®Delta was removed on the ninth day before artificial insemination 60 hours later. Blood samples were taken from the tail vein on days 0 and 8 to determine progesterone levels. The pregnancy rate in the group that received eCG was 37.5%, while it was 27.5% in those that did not (P = 0.4). While the dominant follicle diameter was 15.5 mm in cows injected with eCG during timed artificial insemination, the follicle diameter was 12.4 mm in cows with no eCG injection (P <0.001). There were no differences in serum progesterone values in blood samples taken until the time of artificial insemination. However, progesterone values in the blood taken during artificial insemination were 0.94 ng/ml in the eCG- group and 0.72 ng/ml in the eCG+ group (P <0.05). As a result, it was determined that eCG injections, in addition to progesterone-based GnRH and PGF2α applications, increased the pregnancy rates in cows without symptoms of estrus. The dominant follicle diameter was larger in cows treated with eCG during artificial insemination; however, follicle size did not increase the pregnancy rate.

Money as a Store of Value

2020 ◽  
Vol 52 (5) ◽  
pp. 925-946
Author(s):  
Guy Numa
Keyword(s):  
Economic System ◽  
Substantial Evidence ◽  
Short Term ◽  
Demand For Money ◽  
Lack Of Information ◽  
Good Investment ◽  
Investment Opportunities ◽  
Precautionary Motive ◽  
The Common

The common narrative about Jean-Baptiste Say’s treatment of money holdings is that he denied the possibility of hoarding. I show that this interpretation of Say’s thinking is erroneous. Drawing upon the various editions of Traité and Cours and other lesser-known texts, I provide substantial evidence to refute the widespread but mistaken view that, for Say, money was only a medium of exchange. In reality, not only did Say analyze long-term and short-term hoarding, but more generally, Say did envisage that money could serve as a store of value. In particular, three motives could lead individuals to keep idle balances in times of uncertainty: a precautionary motive, the lack of good investment opportunities, and the lack of information. For Say, the demand for money for precautionary motive rose during depressions, indicating that hoarding was a symptom rather than a cause of disturbance. Hoarding was an integral part of Say’s economic system that did not invalidate his law of outlets.

scholarly journals Challenges to the strategic art at the beginning of XXI century – the twelve fundamental problems that strategists cannot cope with

2019 ◽  
Vol 193 (3) ◽  
pp. 459-472
Author(s):  
Mariusz Fryc
Keyword(s):  
Developing Strategy ◽  
Political Leaders ◽  
Short Term ◽  
Cultural Aspects ◽  
Hard Power ◽  
Probability Of Success ◽  
Strategic Goals ◽  
Level Of Knowledge ◽  
The Common

The main aim of this research is to attract security and defense practi-tioners as well as theorists attention to the common as well as frequent-ly spotted fundamental problems concerning developing and imple-menting strategies of using force to solve security matters in conflicts. The research identified that ineffective strategies are often hampered by the twelve fundamental errors that strategists cannot cope with. Belong to them: 1) inadequate level of knowledge among military and political leaders concerning the strategic art and strategy itself; 2) hardship in defining the end state of the operation as well as creating unachievable strategic goals; 3) formulating a strategy on flawed as-sumptions; 4) inability to find the balance among the key components of each strategy like: goals, ways and means; 5) difficulties in achieving a political and military dialogue; 6) overestimating the effectiveness and usefulness of “hard” power as well deprecating utility of non-military power; 7) underestimating the influence of social and cultural aspects on the desired end state of the operation; 8) developing strategy upon inadequate theoretical and practical models; 9) using the comprehen-sive approach of developing strategy in an uninspired and mechanical way to achieve a competitive advantage over opponent; 10) measuring the success of the operation through the prism of short-term and tacti-cal effects instead of long-term and systemic one; 11) viewing an “exit strategy” as a predetermined date of withdrawal military forces from operation; 12) disregarding usage of the “just” strategies in accordance with international rules of law. Eliminating those errors form the con-temporary practice will make all implemented strategies far for effec-tive in its nature as well as significantly strengthen the probability of success in complex security situation where the force is intended to be applied.

scholarly journals SmartCharge Digital Streetscape: Integrating mobile phones more urbanistically through streetscape interventions

2021 ◽  
Author(s):  
◽  
Jessica Scheurich
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Urban Setting ◽  
Common Belief ◽  
Short Term ◽  
Mobile Phone Technology ◽  
Surrounding Environment ◽  
The Common ◽  
Everyday Routine

<p>Mobile phone technology is rapidly changing our world, how we interact with one another, and our built environment. This thesis investigates how we can integrate mobile phone technology more urbanistically.  There is a tendency for designs of this kind to be a short-term artistic gesture that do not interact with their surrounding environment in either a long term or meaningful way. This thesis argues that the ability of a design to outwardly impact its environment should be considered; rather than sustaining the common belief that design installations only act as a momentary or disposable implementation. It will examine how design can reinvigorate a space and be absorbed into a city’s everyday routine, in a way that it allows it to become permanent and valuable to the streetscape and the community.  This thesis focuses on our dependency on mobile phones by exploring how these devices can overlap with the urban environment through a streetscape intervention. Choosing to test the design of a recharge station across different sites will allow the investigation of the design’s ability to be adapted into different city environments. These stations will be developed with the intention of creating social hotspots that could have a positive outward effect which impacts their urban setting and surroundings. Ultimately these installations will allow us to become digitally and physically connected with society and our city.</p>

scholarly journals SmartCharge Digital Streetscape: Integrating mobile phones more urbanistically through streetscape interventions

2021 ◽  
Author(s):  
◽  
Jessica Scheurich
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Urban Setting ◽  
Common Belief ◽  
Short Term ◽  
Mobile Phone Technology ◽  
Surrounding Environment ◽  
The Common ◽  
Everyday Routine

<p>Mobile phone technology is rapidly changing our world, how we interact with one another, and our built environment. This thesis investigates how we can integrate mobile phone technology more urbanistically.  There is a tendency for designs of this kind to be a short-term artistic gesture that do not interact with their surrounding environment in either a long term or meaningful way. This thesis argues that the ability of a design to outwardly impact its environment should be considered; rather than sustaining the common belief that design installations only act as a momentary or disposable implementation. It will examine how design can reinvigorate a space and be absorbed into a city’s everyday routine, in a way that it allows it to become permanent and valuable to the streetscape and the community.  This thesis focuses on our dependency on mobile phones by exploring how these devices can overlap with the urban environment through a streetscape intervention. Choosing to test the design of a recharge station across different sites will allow the investigation of the design’s ability to be adapted into different city environments. These stations will be developed with the intention of creating social hotspots that could have a positive outward effect which impacts their urban setting and surroundings. Ultimately these installations will allow us to become digitally and physically connected with society and our city.</p>

Why Conflicts In The Former Soviet Union Are So Difficult To Negotiate And Mediate

1996 ◽  
Vol 1 (3) ◽  
pp. 409-421 ◽  
Author(s):  
Marina M. Lebedeva
Keyword(s):  
Soviet Union ◽  
Former Soviet Union ◽  
Transition Period ◽  
Short Term ◽  
Current Transition

AbstractThe difficulty in using negotiation and mediation to resolve conflicts in the former Soviet Union (FSU) derives from factors coming both from the Soviet and pre-Soviet Russian periods and from the current transition. Traditional reliance on authority and government centralization led to both reliance on and distrust of central authorities, neither of which is conducive to negotiation. In the transition period, rigidity, change, long-term and short-term uncertainty, distrust, and absence of valid spokespeople all contribute to undermine negotiations. Yet, inevitably, more negotiation and mediation will be needed and eventually used.

scholarly journals The Danish comorbidity in liver transplant recipients study (DACOLT): a non-interventional prospective observational cohort study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Magda Teresa Thomsen ◽  
Julie Høgh ◽  
Andreas Dehlbæk Knudsen ◽  
Anne Marie Reimer Jensen ◽  
Marco Gelpi ◽  
...  
Keyword(s):  
Risk Factors ◽  
Liver Transplant ◽  
Transplant Recipients ◽  
Short Term ◽  
Term Survival ◽  
Blood Samples ◽  
Liver Transplant Recipients ◽  
Short Term Survival

Abstract Background Liver transplantation is the only curative treatment for patients with end-stage liver disease. Short-term survival has improved due to improved surgical techniques and greater efficacy of immunosuppressive drugs. However, long-term survival has not improved to the same extent as the short-term survival, and the 10-year survival after liver transplantation is 60%. In addition to liver- and transplant-related causes, comorbidities such as cardiovascular, pulmonary, renal, and metabolic diseases have emerged as leading causes of morbidity and mortality in liver transplant recipients. The objective of this study is to assess the burden of comorbidities and identify both liver- and transplant-related risk factors as well as traditional risk factors that contribute to the pathogenesis of comorbidity in liver transplant recipients. Methods/design The Danish Comorbidity in Liver Transplant Recipients (DACOLT) study is an observational, longitudinal study. We aim to include all adult liver transplant recipients in Denmark (n = approx. 600). Participants will be matched by sex and age to controls from the Copenhagen General Population Study (CGPS) and the Copenhagen City Heart Study (CCHS). Physical and biological measures including blood pressure, ankle–brachial index, spirometry, exhaled nitric oxide, electrocardiogram, transthoracic echocardiography, computed tomography (CT) angiography of the heart, unenhanced CT of chest and abdomen and blood samples will be collected using uniform protocols in participants in DACOLT, CGPS, and CCHS. Blood samples will be collected and stored in a research biobank. Follow-up examinations at regular intervals up to 10 years of follow-up are planned. Discussion There is no international consensus standard for optimal clinical care or monitoring of liver transplant recipients. This study will determine prevalence, incidence and risk factors for comorbidity in liver transplant recipients and may be used to provide evidence for guidelines on management, treatment and screening and thereby contribute to improvement of the long-term survival. Trial registration ClinicalTrials.gov: NCT04777032; date of registration: March 02, 2021.

scholarly journals The results of cryopreservation of bull sperm in vegetable fortifier using sorbent

2019 ◽  
pp. 81-84
Author(s):  
L. M. Pavlenko ◽  
B. T. Stegniy ◽  
T. B. Didyk ◽  
B. M. Pavlenko
Keyword(s):  
Silicon Dioxide ◽  
Artificial Insemination ◽  
Activated Charcoal ◽  
Cytoplasmic Membrane ◽  
Fertility Rate ◽  
High Dispersion ◽  
Gynecological Diseases ◽  
Bull Sperm

The paper presents results of the production and use of the phytofortificant of cytoplasmic sperm membranes based on legume hydrolysate with additional purification with sorbents for cryopreservation of bull sperm as an alternative to yolk diluents. The aim of the research was to achieve biosafety, that is, to avoid infectious gynecological diseases, agents of which can be transmitted by the yolk, to increase the fertility rate of females after artificial insemination and to create the conditions for the development of new long-term cryoprotective diluents. It has been established that legumes grain and their hydrolysates contain a toxic nickel element that adversely affects the cytoplasmic membrane of sperm. To reduce this influence, we conducted a study of the action of different sorbents. Activated charcoal standard, silicon dioxide and fine silica were used as sorbents. Sorbents were added in relation of 3% of the volume of medium. According to the results of the studies, the best results were in semen, diluted with medium using high-dispersion silicon dioxide

Sign in / Sign up

Export Citation Format

Share Document