Related Physiological Indexes Research Articles

Research on the Influence of Anti-fatigue Effect and Movement Ability of Blueberry Polysaccharides on Aged Mice.

This topic introduces functions, extraction and purification of polysaccharides and focuses on the effect of blue polysaccharides (BPs) on sport capacity, anti-fatigue effect and related physiological indexes in aged mice induced by D-galactose was investigated. Water extract-alcohol precipitation method was used in the experiment to extract polysaccharides from blueberry, after preliminary purification, research on polysaccharide of its vitro antioxidant activity and bacteriostasis is taken, to provide a reference for the production and application of blueberry polysaccharides. Mice were randomly divided into normal control group, aged model group, low-dose BP group, middle-dose BP group, and high-dose BP group. After the administration of BPs for 20 consecutive days, the exhaustive swimming time and fatigue indexes were determined. The results showed that BPs could extend the exhaustive swimming time, decrease the content of BUN, BLA and MDA, and obviously increase the reservation of HG, MG, SOD and LDH. To conclude, BPs has good anti-fatigue effect. This study may provide theoretical evidence for the development of anti-fatigue drugs from BPs.

Allelopathic effects of extracts from fibrous roots of Coptis chinensis on two leguminous species

An experiment was carried out to study the allelopathic effects of Coptis chinensis fibrous root extracts (CRE) on the germination and seedling growth of Vicia faba and Pisum sativum in order to alleviate the allelopathic effects and increase land productivity. The seeds of both garden pea (P. sativum) and broad been (V. faba) were germinated in CRE solution of various concentrations, the germination rate, seedling growth and related physiological indexes were measured. The result indicated that there were no significant effects of CRE in low concentrations on seed germination, including both the rate and index, and seed vitality and membrane permeability. With the increment of CRE concentrations, however, the high seed membrane permeability and germination inhibition were observed. For example, the germination rates were reduced by 23.4% (P. sativum) and 9.5% (V. faba), respectively, in CRE solution with 800 mg . L-1. Simultaneously, soluble sugars and the free amino acids in the seeds were lower than those in the control (without CRE) after soaking seeds in CRE solutions. In addition, the seedling growth and nitrate reductase activity were stimulated by CRE at low concentrations in contrast to high concentrations which behaved otherwise and inhibited the nutrient utilization in endosperm. Therefore, the large amount of allelochemicals released from the roots and remains of C. chinensis in soils could inhibit the seed germination and seedling growth of legumes, which may lead to decrease even fail crop yields after growing this medical plant.

The response of maize seedlings to cadmium stress under hydroponic conditions

The effects of cadmium (Cd) supply level in nutrient solution (0, 12.5, 25, 50, 100, 200, 400, and 800 μM) on growth, Cd accumulation ability, and the related physiological indices of maize (Zea mays L.) seedlings were studied under hydroponic conditions. The results showed that the increments in the shoot height and biomass were stimulated at relatively low external Cd supply levels (<100 μM), while they were inhibited at Cd supply levels over 200 μM. Cd accumulation ability of the maize seedlings also showed the similar stimulation/inhibition pattern as shoot growth, and the Cd contents in the shoots and roots reached the peaks (389.5 and 505.5 mg/kg dry wt, respectively) at 50 μM Cd. The contents of chlorophyll a, chlorophyll b, and carotenoids in the maize leaf blades decreased with increasing external Cd supply level. At the highest Cd supply level (800 μM), the contents of chlorophyll a, chlorophyll b, and carotenoids in the leaf blade were only 38.9, 46.0, and 29.7% of the control plants, respectively. Moreover, chlorophyll b was more sensitive to the Cd stress than chlorophyll a. The increased proline content in the leaf blade of maize seedlings resulted from external Cd stress indicates that maize can adapt to the adversity menace via changing the content of proline.

Inhibitory Effects of 1-MCP and DPA on Superficial Scald of Dangshansuli Pear

Abstract Dangshansuli pear is one of crisp pears and has a non-climacteric respiratory pattern. Dangshansuli pear fruits were treated with 1 000 or 2 000 uL L- 1 diphenylamine (DPA) for 1 min, or with 0.5 uL L- 1 1-methylcyclopropene (1-MCP) for 12 h before cold storage at (2±0.5)°C for up to 210 d. Incidences of superficial scald and related physiological indexes were investigated during storage. The results showed that superficial scald occurred in control fruit with a rate of over 90% after 210 d at cold storage plus 10 d at room temperature. Treatments with 1 000 and 2 000 uL L- 1 DPA and 0.5 uL L- 11-MCP inhibited the accumulation of a-farnesene, conjugated trienes, total phenolic contents, and malondialdehyde (MDA) during storage. The treatments also decreased leakage of cell membrane and the activity of polyphenol oxidase (PPO) in the peel. These results indicate that 1-MCP and DPA treatments inhibit and postpone the occurrence of superficial scald of Dangshansuli pears remarkably in cold storage and post-storage shelf life, respectively, while the mechanisms were different. The results above may provide a theoretical evidence for the agriculture production.

Effect of music and mood relaxation training for anxiety reduction in patients with breast tumor before operation

Objective To evaluate the effect of music and mood relaxation training for the anxiety in patients with breast tumor before operation. Methods With case-contrast method, 108 patients with breast tumor (52 patients with intervention, 56 with routine treatment) week assessed continuously. All cases were investigated on their common information, physiological indexes and psychological scales, including State-Trait Anxiety Inventory (STAI-Form Y), Social Support Rating Scale (SSRS) and Eysenck Personality Questionaire (EPQ). Results There were significant statistical difference in systolic pressure and pulse rate between two groups on one day (t =3.114, P ＜0.01) and 30-60 minutes (t =3.03, P=0.01) before the operation. There was remarkable difference for anxiety between two groups and among different interventions periods by Repeated Measures ANOVA analysis (Periods: F=18.61, P ＜0.01; Groups: F =7.001, P ＜0.05). Results of Stepwise regression analysis: The influencing factors on anxiety in patients with breast tumor before operation were trait anxiety, breast-feeding history, family history of breast tumor, age, economy and EPQ-N. Conclusion Relaxation music and mood relaxation training can reduce the level of anxiety and related physiological indexes on patients with breast tumor before operation. The influencing factors on anxiety in patients with breast tumor before operation are multi level factors, such as trait anxiety, breast-feeding history and so on. Key words: Breast tumor; , patients anxiety music and mood relaxation training

The role of calcium in regulating photosynthesis and related physiological indexes of cucumber seedlings under low light intensity and suboptimal temperature stress

The response of photosynthesis, antioxidant enzyme activity, and proline content to low light intensity and suboptimal temperature in Cucumis sativa L. seedlings pretreated with either distilled water, 10 mM CaCl 2, 1 mM LaCl 3, 3 mM ethyleneglycol-bis-(2-aminoethyl) tetraacetic acid (EGTA) or 0.05 mM chlorpromazine (CPZ) were investigated. The results showed that 10 mM CaCl 2 led to an increase in photosynthetic rate (Pn), carboxylation efficiency (CE), ribulose 1,5-biphosphate carboxylase (RuBPCase) activity, chlorophyll content, peroxidase (POD) and catalase (CAT) activity, and proline content of cucumber seedlings under low light intensity and suboptimal temperature, in comparison with the distilled water-pretreated seedlings. However, LaCl 3, EGTA and CPZ were in contrast to CaCl 2. These results suggest that CaCl 2 has beneficial effect on photosynthetic adaptation to low light and suboptimal temperature stress in cucumber seedlings. This might be related to the observed increase in RuBPCase activity, alleviation of lipid peroxidation and enhancement of osmoregulation, with these effects being inhibited by LaCl 3, EGTA and CPZ.

Tension reduction and the effects of prolonged alcohol consumption.

SummaryIt has been argued that the phenomenon of alcoholics experiencing mood deterioration during a heavy drinking bout discredits the Tension Reduction Hypothesis of alcohol consumption [6]. An experiment is described which sought to illustrate two ways in which this phenomenon and the hypothesis are compatible. Nine male alcoholics consumed 6gm of alcohol per kg bodyweight in 16 equal doses over two days. Ratings of mood and related physiological indices were used. In the long‐term the physiological measures were elevated on the second drinking day and yet individual doses of alcohol lowered these throughout. Severely alcohol dependent subjects showed corresponding effects for subjective ratings ie long‐term mood deterioration with short‐term improvement. All subjects expected continuing to drink to be reinforcing relative to stopping. Thus alcohol may retain tension‐reducing properties, and alcoholics may expect these, even if affective state was worsened overall during a drinking bout.