INTERNAL SELECTION AND HORMONAL BALANCE IN RAT POPULATION

1981 ◽  
pp. 263-267 ◽  
Author(s):  
K. Gärtner ◽  
K. Döhler ◽  
I. Rechenberg
Keyword(s):  
Hormonal Balance ◽  
Internal Selection

Kaolin impacts on hormonal balance, polyphenolic composition and oenological parameters in red grapevine berries during ripening

2021 ◽  
pp. 1-15
Author(s):  
Sara Bernardo ◽  
Lia-Tânia Dinis ◽  
Nelson Machado ◽  
Ana Barros ◽  
Marta Pitarch-Bielsa ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Growing Season ◽  
Growing Seasons ◽  
Polyphenolic Composition ◽  
Berry Ripening ◽  
Hormonal Balance ◽  
Summer Stress ◽  
Fruit Damage ◽  
Stress Signals

BACKGROUND: Kaolin particle-film application is a well-known strategy to avoid fruit damage. However, its putative role in balancing berry ripening under a changing climate remains poorly explored. OBJECTIVE: We assessed kaolin treatment effect on several ripening berry components, hormonal balance and oenological parameters of the field-grown Touriga-Franca (TF) and Touriga–Nacional (TN) grapevine varieties at veraison (EL35) and ripening (EL38) during two growing seasons (2017 and 2018). RESULTS: Under the adverse summer conditions (two heatwave events) of 2017, kaolin application increased 211.2 %and 51.4 %the salicylic acid (SA) and abscisic acid (ABA) levels in TF berries at EL38, while no significant differences were observed in TN. Conversely, TF, and TN kaolin treated berries showed lower SA and ABA accumulation in 2018, respectively. Tartaric acid content increased about 17.2 %, and 24.2 %in TF and TN treated berries at stage EL35 in the 2017 growing season. Though kaolin treatment had no consistent effect on anthocyanins accumulation, flavonoids, ortho-diphenols and tannins increased in kaolin treated grapevines in 2017. CONCLUSIONS: This study highlights the key role of climate in triggering ripening related processes and fruit quality potential. Nevertheless, kaolin treated grapevines displayed an improved response to oxidative stress signals by increasing secondary metabolites accumulation in warm vintages. Kaolin application promoted different varietal responses, with a possible ripening delaying effect in TF, reinforcing its efficiency in alleviating severe summer stress impacts.

scholarly journals Thin Films in Partial Wetting: Internal Selection of Contact-Line Dynamics

2015 ◽  
Vol 115 (3) ◽  
Author(s):  
Amir Alizadeh Pahlavan ◽  
Luis Cueto-Felgueroso ◽  
Gareth H. McKinley ◽  
Ruben Juanes
Keyword(s):  
Thin Films ◽  
Contact Line ◽  
Partial Wetting ◽  
Internal Selection ◽  
Selection Of ◽  
Contact Line Dynamics

scholarly journals Modern view on the problem of optimization of therapy in pregnant women with functional cervical insufficiency

2018 ◽  
Vol 22 (1) ◽  
pp. 173-177
Author(s):  
V. F. Oleshko
Keyword(s):  
Blood Serum ◽  
Pregnant Women ◽  
Main Group ◽  
Control Group ◽  
Cervical Insufficiency ◽  
Progesterone Concentration ◽  
Therapeutic Dosage ◽  
Hormonal Balance ◽  
Magnesium Orotate ◽  
Micronized Progesterone

A functional cervical insufficiency plays an important role in the etiology of miscarriage and premature birth. The aim of research was to estimate the hormonal balance indexes during the course of pregnancy in pregnant women with functional cervical insufficiency and to correct the revealed violations in order to prevent obstetric complications. 101 pregnant women with confirmed diagnosis of a functional cervical insufficiency in term of gestation 22–32 weeks of pregnancy (the main group) and 34 pregnant women and women in labor with physiological condition of the cervix (the control group) were examined. The content of estradiol, progesterone, cortisol and prolactin was examined in the blood serum. On the second stage of examination 63 pregnant women obtained general basic therapy (I main group) and 38 pregnant women (II main group) received a developed treatment complex which included progesterone support by the micronized progesterone 200–400 mg twice a day up to 34–35 weeks of pregnancy, magnesium support by the magnesium orotate dehydrate in the therapeutic dosage and arginine glutamate in the therapeutic dosage. The correction of cervical insufficiency was performed with the help of a cervical pessary (according to indications). The examination of hormonal balance revealed an accurate decease of progesterone concentration on the background of high concentration of estradiol and increased levels of stress-associated hormones. Propitious influence of the developed therapy is proved by increase of progesterone concentration in the blood serum, normalization in stress-associated hormones balance according to gestational age. All this provideded the decrease of specific weight of threatened preterm labors, placental dysfunction, vaginitis, bacterial vaginosis and delay the labors up to 38–39 weeks of gestation in 97,4% of pregnant women (82,5% in the I main group). Prescription of micronized progesterone, magnesium orotate dehydrate, arginine glutamate to pregnant women with a cervical insufficiency is reasonable and effective one comparing with general and traditional therapy.

scholarly journals Contamination of food with cadmium and dioxins – influence on the human body

2019 ◽  
Vol 65 (3) ◽  
Author(s):  
Aleksandra Słojewska ◽  
Izabela Gutowska
Keyword(s):  
General Population ◽  
Health Effects ◽  
Human Body ◽  
Bone Mineralization ◽  
The Body ◽  
Food Sources ◽  
Hormonal Balance ◽  
Small Doses ◽  
Contaminated Food

Introduction: Food is a carrier of many pollutants nowadays. For cadmium and dioxins, it is the main source of these compounds in the general population. Hence, the aim of this work was to collect data on the health effects associated with exposure to cadmium and dioxins which get into the human body through food.Materials and methods: A literature review was conducted by searching the scientific Medline database (PubMed) and Google Scholar.Results: Health effects associated with a long-term exposure to low doses of cadmium and dioxins may be nonspecific and are rarely attributed to food sources. These may cause disorders affecting hormonal balance, kidney function, lipid metabolism, fertility, cognitive function, bone mineralization, and susceptibility to diseases and allergies. These compounds may also lead to cancer development.Conclusions: The general population faces the problem of longterm exposure to small doses of these substances due to their accumulation in the body, even if their amounts do not exceed the relevant standards. The health effects of this type of exposure may be significantly delayed and are not likely to be attributed to the consumption of contaminated food. Consumers wishing to reduce the amounts of these compounds delivered to the body should limit the consumption of grilled and smoked products, and should also opt for organic food.

scholarly journals Menstrual cycle - hormonal balance and Ayurveda

2020 ◽  
Vol 8 (01) ◽  
Author(s):  
Nilima Pinjari
Keyword(s):  
Menstrual Cycle ◽  
Healthy Woman ◽  
Hormonal Balance ◽  
Normal Menstrual Cycle ◽  
Balance State

In the women , Hormones are pivotal part for keeping mind, body and spirit balanced. A healthy woman is a woman whose hormones are in balance state .Throughout the whole month female faces various symptoms , varies with increasing and decreasing hormones . Ayurveda describe Rutuchakra and various Paricharya which should be followed throughout month. Following these Paricharya one can help for normal formation and elimination of Artava.I.e. normal menstrual cycle.

scholarly journals Optimising grapevine summer stress responses and hormonal balance by applying kaolin in two Portuguese Demarcated Regions

OENO One ◽  
2021 ◽  
Vol 55 (1) ◽  
pp. 207-222
Author(s):  
Sara Bernardo ◽  
Lia-Tânia Dinis ◽  
Ana Luzio ◽  
Nelson Machado ◽  
Alexandre Gonçalves ◽  
...  
Keyword(s):  
Stress Responses ◽  
Environmental Conditions ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Carbon Assimilation ◽  
Mitigation Strategies ◽  
Growing Seasons ◽  
Hormonal Balance ◽  
Summer Stress ◽  
Grapevine Leaves

In Mediterranean-like climate areas, field-grown grapevines are typically exposed to severe environmental conditions during the summer season, which can negatively impact the sustainability of viticulture. Despite the short-term mitigation strategies available nowadays to cope with climate change, little is known regarding their effectiveness in different demarcated winegrowing regions with differing climate features. Hence, we applied a kaolin suspension (5 %) to Touriga-Franca (TF) and Touriga-Nacional (TN) grapevine varieties located in two Portuguese demarcated regions (Alentejo and Douro) with different mesoclimates to study its effect on the physiological performance, hormonal balance and ABA-related grapevine leaf gene expression during the 2017 and 2018 growing seasons. Data show that 2017 was warmer than 2018 due to the occurrence of two heatwaves in both locations, highlighting the protective effect of kaolin application under severe environmental conditions. In the first study year, at midday, kaolin enhanced water use efficiency (23 % in Douro and 13 % in Alentejo), carbon assimilation rates (PN; 72 % in Douro and 25 % in Alentejo), and the soluble sugar content of grapevine leaves, while decreasing the accumulation of plant growth regulators (ABA, IAA, and SA) during the ripening stage. The results show an up-regulation of ABA biosynthesis-related genes (VvNCED) in TF treated vines from the Douro vineyard mainly in 2017, suggesting an increased stress response under severe summer conditions. Additionally, kaolin triggered the expression of ABA-responsive genes (VvHVA22a and VvSnRK2.6) mainly in TF, indicating different varietal responses to kaolin application under fluctuating periods of summer stress.

scholarly journals Complex constraints on allometry revealed by artificial selection on the wing of Drosophila melanogaster

2015 ◽  
Vol 112 (43) ◽  
pp. 13284-13289 ◽  
Author(s):  
Geir H. Bolstad ◽  
Jason A. Cassara ◽  
Eladio Márquez ◽  
Thomas F. Hansen ◽  
Kim van der Linde ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Artificial Selection ◽  
Allometric Scaling ◽  
Power Laws ◽  
Selection Response ◽  
Wing Shape ◽  
Fundamental Aspect ◽  
Direct Selection ◽  
Evolutionary Potential ◽  
Internal Selection

Precise exponential scaling with size is a fundamental aspect of phenotypic variation. These allometric power laws are often invariant across taxa and have long been hypothesized to reflect developmental constraints. Here we test this hypothesis by investigating the evolutionary potential of an allometric scaling relationship in drosophilid wing shape that is nearly invariant across 111 species separated by at least 50 million years of evolution. In only 26 generations of artificial selection in a population of Drosophila melanogaster, we were able to drive the allometric slope to the outer range of those found among the 111 sampled species. This response was rapidly lost when selection was suspended. Only a small proportion of this reversal could be explained by breakup of linkage disequilibrium, and direct selection on wing shape is also unlikely to explain the reversal, because the more divergent wing shapes produced by selection on the allometric intercept did not revert. We hypothesize that the reversal was instead caused by internal selection arising from pleiotropic links to unknown traits. Our results also suggest that the observed selection response in the allometric slope was due to a component expressed late in larval development and that variation in earlier development did not respond to selection. Together, these results are consistent with a role for pleiotropic constraints in explaining the remarkable evolutionary stability of allometric scaling.

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