Dose-Dependent Effects of the Action of Sulfur Nanoparticles on the Growth Response and Seed Production of Typical Steppe Phytocenoses

2017 ◽  
Vol 13 ◽  
pp. 156-161 ◽  
Author(s):  
Zinaida N. Ryabinina ◽  
Marija V. Ryabukhina ◽  
Maya V. Kolodina
Keyword(s):  
Seed Production ◽  
Biochemical Parameters ◽  
Growth Response ◽  
Growth Responses ◽  
Seed Productivity ◽  
Typical Steppe ◽  
Forms Of Life ◽  
Dose Dependent ◽  
Biological Group ◽  
Sulfur Nanoparticles

The article presents the results of a study of typical steppe phytocenoses presented one ecological and biological group - xeromesophyte but different systematic affiliation and forms of life, to the action of sulfur nanoparticles. Results of the study showed a relationship between the concentrations of sulfur nanoparticles and growth responses, biochemical parameters and seed productivity of investigated species

L-Lactic Acid’s Improvement of Swimming Endurance in Mice

2009 ◽  
Vol 19 (6) ◽  
pp. 673-684 ◽  
Author(s):  
Guihua Zhang ◽  
Nobuya Shirai ◽  
Hiramitsu Suzuki
Keyword(s):  
Lactic Acid ◽  
Biochemical Parameters ◽  
Liver Glycogen ◽  
Nonesterified Fatty Acid ◽  
Saline Injection ◽  
Muscle Lactate ◽  
Swimming Time ◽  
Biochemical Analyses ◽  
Swimming Endurance ◽  
Dose Dependent

The aim of this study was to investigate the effect of L-lactic acid on swimming endurance of mice. Mice (n = 50) were injected intraperitoneally with saline, then with L-lactic acid (either 25 mg/kg or 50 mg/kg body weight), then after 2 days with the same doses of glucose, and after another 2 days again with L-lactic acid at the same doses. Swimming times to exhaustion were determined at 30 min after each injection, in a tank filled with 25 cm of water maintained at 23 °C. After another week, mice were given either saline, L-lactic acid, or glucose (25 or 50 mg/kg) dissolved in saline and sacrificed after 30 min for biochemical analyses. The ratios of swimming times of L-lactic acid or glucose injections to saline injection were calculated as an index for endurance changes. Swimmingtime ratios for mice injected with L-lactic acid were significantly higher at either dose than for those injected with the corresponding doses of glucose (p < .05). The ratio of swimming time was greater in those given a dose of 50 mg/kg than in those given 25 mg/kg for mice in the L-lactic acid groups (p < .05) but not in the groups given glucose. There were no marked differences in biochemical parameters of plasma and muscle lactate, muscle and liver glycogen, or plasma glucose and nonesterified fatty acid between the L-lactic acid, glucose, and saline injection groups. These results suggest that L-lactic acid can enhance swimming endurance of mice and that this action is dose dependent.

Growth responses in red deer hinds from 16-24 months of age when fed two energy levels during their second winter

1998 ◽  
Vol 1998 ◽  
pp. 141-141
Author(s):  
M H Davies ◽  
D W Deakin
Keyword(s):  
Growth Response ◽  
Red Deer ◽  
Energy Levels ◽  
Growth Restriction ◽  
Growth Responses ◽  
Wide Range ◽  
Feeding Regimes ◽  
Cost Of Production ◽  
Red Meats

It is important that venison competes with other red meats in efficiency and cost of production. The growth responses of farmed red deer during the first 15-18 months of life have been well defined under a wide range of feeding and daylength regimes (Davies, 1995). However there is a need to examine less intensive systems of production which aim to maximise growth from grazed grass, following various growth-restriction feeding regimes during winter. The objective of this experiment was to quantify the growth response in 16-24 month old hinds fed two contrasting feeding regimes during their second winter, followed by a period at pasture.

scholarly journals Seed production of lemon balm and the quality of its seeds in the middle of the Volga region

2019 ◽  
pp. 34-36
Author(s):  
Ilya Alexandrovich Khapugin
Keyword(s):  
Seed Production ◽  
Weather Conditions ◽  
Mineral Fertilizers ◽  
Small Scale ◽  
Melissa Officinalis ◽  
Seed Productivity ◽  
Lemon Balm ◽  
Maximum Productivity ◽  
Scale Experiment

The influence of mineral fertilizers on seed productivity and quality of obtained seeds of lemon balm (Melissa officinalis L.) was studied in the field small-scale experiment under conditions of unstable moistening of the Mordovia Republic. As a result, it was found that seed productivity varied depending on weather conditions and the types of fertilizers introduced. It was shown that the maximum productivity of Melissa officinalis plants was on the variant with the use of phosphorus-potassium fertilizers at a dose of P60K90 (71.2±78.5 g/m2 in 2017 and 48.8±4.3 g/m2 in 2018), while it exceeded the control variant by 74-91 %. The total germination of seeds of Melissa officinalis practically did not change over the years, and was in the range of 37-39 %. Separation of seeds according to the degree of aging allowed to increase germination 11.4-13.3 %.  

scholarly journals Toxicological assessment of the methanolic leaf extract of Bridelia ferrugelia

2018 ◽  
Vol 7 (5) ◽  
pp. 419-424
Author(s):  
Abiodun Olusoji Owoade ◽  
◽  
Adewale Adetutu ◽  
Augustine Ikhueoya Airaodion ◽  
Olufemi Ogundeji Ogundipe ◽  
...  
Keyword(s):  
Biochemical Parameters ◽  
Leaf Extract ◽  
Blood Lipids ◽  
Lipid Levels ◽  
Toxicological Evaluation ◽  
Toxicological Assessment ◽  
Acute Group ◽  
Male Wistar Rats ◽  
Dose Dependent Decrease ◽  
Dose Dependent

This study evaluated the acute and subacute toxicity effects of Bridelia ferrugelia leaf extract. Observation of the acute group showed that LD50 of the extract is greater than 2000 mg/kg. The subacute investigation was determined by administering 200 mg/kg, 400 mg/kg and 600 mg/kg of the methanolic leaf extract to male Wistar rats for 28 days with distilled water as a control. Haematological and biochemical parameters, as well as lipid levels of vital organs, were examined. Toxicological evaluation of the extract did not produce any significant change in haematological and biochemical parameters in rats. In addition, blood lipids levels were not significantly affected, while dyslipidaemia effect observed in some vital organs were found to be nonlipotoxic. Administration of Bridelia ferrugelia at a dose of 200, 400 and 600 mg/kg for 28 days resulted in reduction of cardiac cholesterol level by 37.16%, 39.36% and 17.64% respectively, reduction of pulmonary cholesterol by 22.17%, 28.08% and 6.24 % respectively and dose-dependent decrease in pulmonary triglyceride level by 16.17, 29.14 and 54.25% respectively. This study indicates that Bridelia ferrugelia extract administered at 200, 400 and 600 mg/kg did not show any toxic effect on the parameters investigated in rats. Thus, the extract can be considered safe when administered orally

Growth responses in red deer hinds from 16-24 months of age when fed two energy levels during their second winter

1998 ◽  
Vol 1998 ◽  
pp. 141-141
Author(s):  
M H Davies ◽  
D W Deakin
Keyword(s):  
Growth Response ◽  
Red Deer ◽  
Energy Levels ◽  
Growth Restriction ◽  
Growth Responses ◽  
Wide Range ◽  
Feeding Regimes ◽  
Cost Of Production ◽  
Red Meats

It is important that venison competes with other red meats in efficiency and cost of production. The growth responses of farmed red deer during the first 15-18 months of life have been well defined under a wide range of feeding and daylength regimes (Davies, 1995). However there is a need to examine less intensive systems of production which aim to maximise growth from grazed grass, following various growth-restriction feeding regimes during winter. The objective of this experiment was to quantify the growth response in 16-24 month old hinds fed two contrasting feeding regimes during their second winter, followed by a period at pasture.

Biochemical parameters regulating forward motility initiation in vitro in goat immature epididymal spermatozoa

1998 ◽  
Vol 10 (4) ◽  
pp. 299 ◽  
Author(s):  
Bijay S. Jaiswal ◽  
Gopal C. Majumder
Keyword(s):  
Cyclic Amp ◽  
Sperm Motility ◽  
Biochemical Parameters ◽  
Vital Role ◽  
Dependent Manner ◽  
Alkaline Ph ◽  
Heat Stable ◽  
Heat Stable Protein ◽  
Dose Dependent

An investigation was carried out to analyse the biochemical parameters influencing forward motility (FM) initiation in vitro in the goat caput-epididymal immature spermatozoa. Forward motility was induced in approximately 55% of caput-sperm upon incubation in an alkaline (pH 8.0) modified Ringer’s solution containing theophylline (30 mM) (an inhibitor of cyclic AMP phosphodiesterase), dialysed epi-didymal plasma (EP) and bicarbonate. Both EP and bicarbonate induced sperm motility in a dose-dependent manner, and at saturating doses EP (0.6 mg protein mL–1) and bicarbonate (25 mM) induced FM in approx-imately 38% and 44% of the cells, respectively. The motility-promoting efficacy of EP was attributed to a heat-stable protein termed ‘forward motility protein’ (FMP). Bicarbonate served as an initiator as well as a stabilizer of FM and its action was not dependent on FMP. FMP can induce FM in the caput-sperm, but it is not essential for sperm motility initiation. Alteration of the medium pH from 6.60 to 8.00 caused a marked increase in the EP or bicarbonate-dependent sperm FM initiation, as well as intrasperm pH. At the physio-logical pH, bicarbonate served as a much more potent motility activator than FMP, although both the motility promoters showed maximal efficacy at alkaline pH (~7.8). EP as well as bicarbonate elevated the intrasperm cyclic AMP level. Unlike EP, bicarbonate is capable of increasing intrasperm pH. The intrasperm pH increased from 6.54 0.02 to 6.77 0.03 during sperm transit from caput to cauda. The data are con-sistent with the view that FMP activates sperm forward motility by enhancing the intrasperm cyclic AMP level and that extracellular bicarbonate and pH play a vital role in the initiation of sperm FM during the epi-didymal transit.

scholarly journals Brassinosteroids Induce Strong, Dose-Dependent Inhibition of Etiolated Pea Seedling Growth Correlated with Ethylene Production

Biomolecules ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 849
Author(s):  
Jiroutová ◽  
Mikulík ◽  
Novák ◽  
Strnad ◽  
Oklestkova
Keyword(s):  
Ethylene Production ◽  
Biological Activities ◽  
Growth Responses ◽  
Pea Seedlings ◽  
Highly Sensitive ◽  
Dependent Inhibition ◽  
Ca 50 ◽  
Dose Dependent Inhibition ◽  
Optimized Conditions ◽  
Dose Dependent

We have recently discovered that brassinosteroids (BRs) can inhibit the growth of etiolated pea seedlings dose-dependently in a similar manner to the ‘triple response’ induced by ethylene. We demonstrate here that the growth inhibition of etiolated pea shoots strongly correlates with increases in ethylene production, which also responds dose-dependently to applied BRs. We assessed the biological activities of two natural BRs on pea seedlings, which are excellent material as they grow rapidly, and respond both linearly and uni-phasically to applied BRs. We then compared the BRs’ inhibitory effects on growth, and induction of ethylene and ACC (1-aminocyclopropane-1-carboxylic acid) production, to those of representatives of other phytohormone classes (cytokinins, auxins, and gibberellins). Auxin induced ca. 50-fold weaker responses in etiolated pea seedlings than brassinolide, and the other phytohormones induced much weaker (or opposite) responses. Following the optimization of conditions for determining ethylene production after BR treatment, we found a positive correlation between BR bioactivity and ethylene production. Finally, we optimized conditions for pea growth responses and developed a new, highly sensitive, and convenient bioassay for BR activity.

scholarly journals ANTI-DIABETIC EFFECT OF A NOVEL NANO POLYMER OF THYMOL IN STREPTOZOTOCIN-INDUCED DIABETIC WISTAR RATS

2019 ◽  
pp. 81-89
Author(s):  
ELAHE KARIMI ◽  
SHAHRYAR ABBASI ◽  
ALI AIDY ◽  
HORI GHANEIALVAR ◽  
SHAHRAM MOHAMMADPOUR ◽  
...  
Keyword(s):  
Animal Model ◽  
Biochemical Parameters ◽  
Wistar Rats ◽  
Liver Enzymes ◽  
Serum Glucose ◽  
Diabetic Rats ◽  
Dependent Manner ◽  
Elisa Kit ◽  
Blood Biochemical ◽  
Dose Dependent

Objective: The aim of this study was to evaluate the effect of thymol and thymol nano polymer on the blood biochemical parameters and anti-diabetic activity in Streptozotocin (STZ)-induced diabetic rats. Methods: The synthesized nano polymer (NP) was characterized by using different spectroscopy methods, such as IR, HNMR and CNMR. Loading and releasing of thymol were investigated by HPLC. Eleven groups of the Streptozotocin-induced diabetic and normal rats (overall 110 males) were tested through various biochemical factors such as: serum glucose, insulin, liver function-related enzymes including ALT, AST, ALP and bilirubin by ELISA kit methods. Results: It has shown that thymol nano polymer is desirable for transferring drug. The amount of thymol loaded on NP estimated at 43±2.5 %. Then, 65% of the loaded drug was released. LD50 for thymol and thymol nano polymer were 435 and 583 mg/kg, respectively. thymol nano polymer at doses of 30, 60 and 90 mg/kg, in a dose-dependent manner, reduced blood glucose, increased insulin levels, and controlled liver enzymes ALT, AST, ALP and bilirubin in the STZ-induced diabetic rats. Conclusion: The use of thymol nano polymer appears to be a new aspect concerning to protect diabetes-induced damage in the animal model.

scholarly journals Are Commonly Measured Functional Traits Involved in Tropical Tree Responses to Climate?

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Fabien Wagner ◽  
Vivien Rossi ◽  
Christopher Baraloto ◽  
Damien Bonal ◽  
Clément Stahl ◽  
...  
Keyword(s):  
Functional Traits ◽  
Tree Growth ◽  
Water Availability ◽  
Growth Response ◽  
Climate Models ◽  
Growth Strategy ◽  
Limiting Factor ◽  
Maximum Height ◽  
Growth Strategies ◽  
Growth Responses

Climate models predict significant rainfall reduction in Amazonia, reducing water availability for trees. We present how functional traits modulate the tree growth response to climate. We used data from 3 years of bimestrial growth measurements for 204 trees of 53 species in the forest of Paracou, French Guiana. We integrated climate variables from an eddy covariance tower and functional trait values describing life history, leaf, and stem economics. Our results indicated that the measured functional traits are to some extent linked to the response of trees to climate but they are poor predictors of the tree climate-induced growth variation. Tree growth was affected by water availability for most of the species with different species growth strategies in drought conditions. These strategies were linked to some functional traits, especially maximum height and wood density. These results suggest that (i) trees seem adapted to the dry season at Paracou but they show different growth responses to drought, (ii) drought response is linked to growth strategy and is partly explained by functional traits, and (iii) the limited part of the variation of tree growth explained by functional traits may be a strong limiting factor for the prediction of tree growth response to climate.

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