scholarly journals Simultaneous Quantitative and Qualitative Analysis of Flavonoids from Ultraviolet-B Radiation in Leaves and Roots ofScutellaria baicalensisGeorgi Using LC-UV-ESI-Q/TOF/MS

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Wen-Ting Tang ◽  
Min-Feng Fang ◽  
Xiao Liu ◽  
Ming Yue
Keyword(s):  
Qualitative Analysis ◽  
High Intensity ◽  
Herbal Medicines ◽  
Antibacterial Activities ◽  
Ultraviolet B ◽  
Control Group ◽  
Low Intensity ◽  
Leaves And Roots ◽  
Intensity Radiation ◽  
Tof Ms

Scutellaria baicalensisGeorgi is one of the most widely used traditional Chinese herbal medicines. It has been used for anti-inflammatory, anticancer, antibacterial activities, and so forth. Long-term enhanced ultraviolet-B (UV-B) radiation caused more effect on leaves than on roots of the plant. Liquid chromatography-ultraviolet detection coupled with electrospray ionization quadrupole time-of-flight mass spectrometry (LC-UV-ESI-Q/TOF/MS) method was applied for simultaneous quantitative and qualitative analysis of flavonoids in leaves and roots ofS. baicalensisby enhanced UV-B radiation. Both low-intensity radiation and high-intensity radiation were not significantly increaseing the contents of baicalin, wogonoside, and wogonin in roots. However different intensity of radiation has different effects on several flavonoids in leaves. Both low-intensity radiation and high-intensity radiation had no significant effect on contents of baicalin and tectoridin in leaves; the content of scutellarin was significantly decreased by low-intensity radiation; chrysin was detected in low-intensity radiation and high-intensity radiation, and chrysin content is the highest in low-intensity radiation, but chrysin was not detected in control group. Different changes of different flavonoids under enhanced UV-B radiation indicate that induction on flavonoids is selective by enhanced UV-B radiation.

Controlled 5-mo aerobic training improves heart rate but not heart rate variability or baroreflex sensitivity

2000 ◽  
Vol 89 (5) ◽  
pp. 1825-1829 ◽  
Author(s):  
Antti Loimaala ◽  
Heikki Huikuri ◽  
Pekka Oja ◽  
Matti Pasanen ◽  
Ilkka Vuori
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Exercise Training ◽  
High Intensity ◽  
Baroreflex Sensitivity ◽  
Aerobic Training ◽  
Control Group ◽  
Resting Heart Rate ◽  
Endurance Time ◽  
Low Intensity

Endurance-trained athletes have increased heart rate variability (HRV), but it is not known whether exercise training improves the HRV and baroreflex sensitivity (BRS) in sedentary persons. We compared the effects of low- and high-intensity endurance training on resting heart rate, HRV, and BRS. The maximal oxygen uptake and endurance time increased significantly in the high-intensity group compared with the control group. Heart rate did not change significantly in the low-intensity group but decreased significantly in the high-intensity group (−6 beats/min, 95% confidence interval; −10 to −1 beats/min, exercise vs. control). No significant changes occurred in either the time or frequency domain measures of HRV or BRS in either of the exercise groups. Exercise training was not able to modify the cardiac vagal outflow in sedentary, middle-aged persons.

scholarly journals UV-B Radiations and Secondary Metabolites

2020 ◽  
Vol 8 (1) ◽  
pp. 147 ◽  
Author(s):  
İlkay Yavaş ◽  
Aydın Ünay ◽  
Shafaqat Ali ◽  
Zohaib Abbas
Keyword(s):  
Phenolic Compounds ◽  
Secondary Metabolites ◽  
High Intensity ◽  
Ultraviolet B ◽  
Low Intensity ◽  
Reproductive Ability ◽  
Early Ripening ◽  
Low Levels ◽  
Damaging Effects

Ultraviolet-B (UV-B: 280 to 320 nm) radiations have appeared to be detrimental to plants, due to their damaging effects on proteins, lipids, membranes and DNA. UV-B radiations are a significant regulator of plants’ secondary metabolites. High intensity of ultraviolet radiations may interfere with growth and productivity of crops. But low levels of UV-B radiations give rise to changes in the plants’ secondary metabolites such as phenolic compounds, carotenoids and glucoseinolates. Therefore, low intensity of UV-B radiations may be used to generate plants, enriched with secondary metabolites, having improved reproductive ability, early ripening and tolerance against fungi, bacteria and herbivores.

scholarly journals A Single Bout of High-Intensity Cardiovascular Exercise Does Not Enhance Motor Performance and Learning of a Visuomotor Force Modulation Task, but Triggers Ipsilateral Task-Related EEG Activity

2021 ◽  
Vol 18 (23) ◽  
pp. 12512
Author(s):  
Nils Henrik Pixa ◽  
Lena Hübner ◽  
Dieter F. Kutz ◽  
Claudia Voelcker-Rehage
Keyword(s):  
Motor Learning ◽  
Sensorimotor Cortex ◽  
High Intensity ◽  
Motor Performance ◽  
Control Group ◽  
Cardiovascular Exercise ◽  
Force Matching ◽  
Low Intensity ◽  
Motor Practice ◽  
Long Run

Acute cardiovascular exercise (aCE) seems to be a promising strategy to improve motor performance and learning. However, results are heterogeneous, and the related neurophysiological mechanisms are not well understood. Oscillatory brain activitiy, such as task-related power (TRPow) in the alpha and beta frequencies, are known neural signatures of motor activity. Here, we tested the effects of aCE on motor performance and learning, along with corresponding modulations in EEG TRPow over the sensorimotor cortex. Forty-five right-handed participants (aged 18–34 years) practiced a visuomotor force-matching (FM) task after either high-intensity (HEG), low-intensity (LEG), or no exercise (control group, CG). Motor performance was assessed immediately, 15 min, 30 min, and 24 h after aCE/control. EEG was measured during the FM task. Results of frequentist and Bayesian statistics revealed that high- and low-intensity aCE had no effect at the behavioral level, adding to the previous mixed results. Interestingly, EEG analyses showed an effect of aCE on the ipsilateral sensorimotor cortex, with a stronger decrease in β-TRPow 15 min after exercise in both groups compared to the CG. Overall, aCE applied before motor practice increased ipsilateral sensorimotor activity, while motor learning was not affected; it remains to be seen whether aCE might affect motor learning in the long run.

scholarly journals The application of high intensity and low intensity magnetotherapy in rehabilitation of patients with COVID-19 - a randomized controlled pilot study.

2020 ◽  
pp. 322-328
Author(s):  
Eiena Silantyeva
Keyword(s):  
Electromagnetic Field ◽  
High Intensity ◽  
Severe Pneumonia ◽  
Clinical Effectiveness ◽  
Rehabilitation Medicine ◽  
Outpatient Rehabilitation ◽  
Control Group ◽  
Low Intensity ◽  
Therapeutic Exercises ◽  
Rehabilitation Measures

Background: rehabilitation of patients after severe pneumonia associated with the new coronavirus infection requires the searching for effective tools to restore impaired functions, including methods of hardware physiotherapy. Aims: to evaluate the effectiveness of the application of high-intensity electromagnetic field (HIEF) in rehabilitation of patients after pneumonia associated with COVID-19. Materials and methods: 40 patients were examined and treated at the outpatient stage of rehabilitation after severe pneumonia associated with COVID-19. All patients received a set of rehabilitation measures, including daily sessions of therapeutic exercises (No. 15) and magnetotherapy procedures (No. 15). Patients were randomly separated into 2 groups - 20 patients in the treatment group (TG) who received HIEF therapy (BTL-6000 Super Inductive System) and 20 patients in the control group (CG) who received low-intensity magnetotherapy (BTL-4000 Premium device). Results: during the course of therapy, there were no patients who dropped out of the study, and no undesirable side effects and complications were identified. The high clinical effectiveness of the complex of rehabilitation measures has been proven, more pronounced in the group of patients receiving HIEF therapy. The results were confirmed by reliable dynamics of clinical indicators according to the valid questionnaire and positive changes in spirometry data. Conclusions: application of high-intensity electromagnetic field (HIEF) is advisable in complex outpatient rehabilitation of patients after severe pneumonia associated with COVID-19 . Keywords: COVID-19, pneumonia, magnetotherapy, high-intensity electromagnetic field, physical and rehabilitation medicine.

scholarly journals The acute effect of different intensity aerobic and resistance training exercise on the body image in adult women

2021 ◽  
pp. 22-31
Author(s):  
Carpio-Rivera E ◽  
Moncada-Jiménez J ◽  
Salazar-Roja W ◽  
Araya-Vargas G
Keyword(s):  
Resistance Training ◽  
Exercise Intensity ◽  
High Intensity ◽  
Acute Effect ◽  
The Body ◽  
Control Group ◽  
Adult Women ◽  
Low Intensity ◽  
Resistance Training Exercise ◽  
Group 2

The purpose of the study was to evaluate the acute effect of different intensity aerobic (AE) and resistance training (RT) exercises on BI in adult women. Participants were 62 adult women (19.47 ± 2.53 yr., range 18 a 33 yr.), who were randomly assigned to three sessions of either: 1) Control group, 2) Low-intensity AE, 3) High-intensity AE, 4) Low-intensity RT, or 5) High-intensity RT. Before and immediately following each experimental intervention, BI, body weight, and arm and leg circumferences were measured. Three familiarization sessions were performed every 7 days before the AE and RT experimental interventions. Also, 5-RM tests were performed one week before the RT experimental interventions. Data were analyzed using mixed 3-way ANOVA, mixed 4-way ANOVA, and post-hoc analysis. An acute effect of RT on BI was observed, regardless of the exercise intensity, women felt more muscular immediately following the RT session. Regardless of the exercise intensity, 30-min of acute RT exercise changed BI perception, contrary to 30 min AE.

scholarly journals Comparison Of The Efficacy Of Two Laser Types In Healing Of Full-Thickness Wound: An Experimental Study

2020 ◽  
Vol 9 (4) ◽  
Author(s):  
Hesham Galal Mahran
Keyword(s):  
Wound Healing ◽  
High Intensity ◽  
Male Rats ◽  
Control Group ◽  
Full Thickness ◽  
Scanning Method ◽  
Low Intensity ◽  
Laser Group ◽  
Group B ◽  
Full Thickness Wound

The aim of the study ― To investigate the effectiveness of pulsed laser with high intensity and laser with low intensity on a full-thickness wound in rats and to compare the effects of both laser types. Material and Methods ― Forty-five adult male rats were utilized in the present study. After anesthesia, wound of five cm2 was produced on dorsal aspect in each rat; then, the rats were randomly classified into three groups as follows: high power pulsating laser group (A) which received Nd: YAG laser with 1064 nm wavelength, low power laser group (B) which received GaAlAs laser with 830 nm wavelength, and control group (C) which received no treatment. Laser lights in groups (A) and (B) were introduced at an intensity of five joules per cm2 with a total energy of 25 joules for each wound area through the use of a scanning method and at a rate of 3 sessions per week for three weeks. Results ― At the end of treatment, better wound healing in form of more wound contraction and higher healing rate was elicited in both laser groups in comparison to wound healing in the control group, and there were no significantly different effects between both laser types. Conclusion ― At the intensity of five joules/cm2, both low-intensity and pulsating high-intensity lasers speed up the healing of the wound in rats, and there are no significant differences between their effects.

scholarly journals THE EFFECT OF DIFFERENT LIGHT CURED UNIT INTENSITIES ON THE DEPTH OF POLYMERIZATION OF BULK FILL SCULPTABLE COMPOSITE RESIN RESTORATIONS

Jurnal Medali ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Alphania Esty Luthfaida ◽  
Arlina Nurhapsari ◽  
Helmi Fathurrahman
Keyword(s):  
High Intensity ◽  
Composite Resin ◽  
Physical And Mechanical Properties ◽  
Control Group ◽  
Control Group Design ◽  
Group Design ◽  
Low Intensity ◽  
Soft Start ◽  
Post Test ◽  
Composite Resin Restorations

Background : The latest development of dental material restoration is a bulk fill sculptable composite resin. This material can be applied to a 4 mm cavity at once irradiation. The success of polymerization can be affected by improper irradiation. Both the physical and mechanical properties of the material also can be decreased by improper irradiation. This study aimed to determine the effect of different light-cured unit intensities on the depth of polymerization of bulk fills sculptable composite resin restorations.Method : This research method was an experimental analytic type of post-test only control group design laboratory, consisting of 24 bulk fill sculptable composite resin with a diameter of 4mm x 6mm thickness divided into 6 groups:A1(3M ESPE-low intensity),A2(3M ESPE-high intensity),A3(3M ESPE-soft start intensity),B1(Ivoclar vivacity-low intensity),B2(Ivoclar vivadent-high intensity) and B3(Ivoclar vivadent-soft start intensity). Result : The results showed a significant effect of the low, high, and soft start intensity light-cured units in the bulk fill sculptable composite resin groups by Kruskal-Wallis test 0.00 (p <0.05).Conclusion : The best polymerization depth of bulk fill sculptable composite resin was 3M ESPE and it was affected by the high and low-intensity light-cured units

scholarly journals Efecto agudo de descansos físicamente activos en variables cognitivas y creatividad en Educación Secundaria (Acute effect of physically active rests on cognitive variables and creativity in Secondary Education)

Retos ◽  
2020 ◽  
pp. 635-642
Author(s):  
Alberto Ruiz-Ariza ◽  
Sebastián López-Serrano ◽  
Albeto Mezcua-Hidalgo ◽  
Emilio J. Martínez-López ◽  
Khader Abu-Helaiel
Keyword(s):  
High Intensity ◽  
Acute Effect ◽  
Control Group ◽  
Cognitive Variables ◽  
Low Intensity ◽  
Different Types ◽  
Mathematical Calculation ◽  
Active Breaks ◽  
Experimental Group ◽  
School Youth

 El objetivo del presente estudio fue conocer el efecto agudo de dos tipos diferentes de descansos activos (baja y alta intensidad), llevados a cabo entre dos clases, sobre varias variables cognitivas como la memoria, atención-concentración, cálculo matemático, razonamiento lingüístico y creatividad en jóvenes de Educación Secundaria. Participaron 136 adolescentes de 12.92 ± 0.43 años. Se emplearon 3 grupos de estudio: 1) Grupo de control (GC) que permaneció sentado dentro de la clase; 2) Grupo experimental 1 (GE1) que realizó 1 descanso activo de 4 minutos a baja intensidad; y 3) Grupo experimental 2 (GE2) que llevó a cabo ejercicios de alta intensidad. Para analizar los efectos de los diferentes tipos de descansos se empleó ANCOVA de medidas repetidas 3 Grupo (GC, GE1, GE2) x 2 Tiempo (pre, post). Se empleó como covariables la edad, sexo y estudios de la madre. Los resultados mostraron que los descansos activos mejoraron la memoria posterior de los participantes (p<0.001). Los descansos activos de baja intensidad presentaron un efecto de mejora similar en la atención y concentración (21 y 25%, p<0.001). Se observaron mejoras en el cálculo matemático tras ambos tipos de descansos activos, sin embargo, las diferencias no han llegado a ser significativas. Los adolescentes no mostraron mejoras en la capacidad lingüística ni en la creatividad. Se sugiere la inclusión de descansos activos, preferiblemente a baja intensidad, para obtener beneficios a corto plazo en la atención, concentración y cálculo matemático en jóvenes de educación secundaria.   Abstract. The objective of this study was to know the acute effect of two different types of active breaks (low and high intensity), carried out between two classes, on several cognitive variables such as memory, attention-concentration, mathematical calculation, linguistic reasoning and creativity in high school youth. 136 adolescents of 12.92 ± 0.43 years participated. Three study groups were used: 1) Control group (CG) that remained seated within the class; 2) Experimental group 1 (EG1) that made 1 active break of 4 minutes at low intensity; and 3) Experimental group 2 (EG2) that carried out high intensity exercises. To analyze the effects of the different types of breaks, ANCOVA was used with repeated measures 3 Group (CG, EG1, EG2) x 2 Time (pre, post). Age, sex and studies of the mother were used as covariates. The results showed that active rest improved the participants' later memory (p <0.001). The low intensity active breaks had a similar improvement effect in attention and concentration (21 and 25%, p <0.001). Improvements in the mathematical calculation were observed after both types of active breaks, however, the differences have not become significant. The adolescents showed no improvement in linguistic ability or creativity. It is suggested the inclusion of active breaks, preferably at low intensity, to obtain short-term benefits in the attention, concentration and mathematical calculation in secondary school youth.

scholarly journals The Effects of High-Intensity Aerobic Exercise on Cognitive Performance After Stroke: A Pilot Randomised Controlled Trial

2019 ◽  
Vol 11 ◽  
pp. 117957351984349 ◽  
Author(s):  
Hanne Pallesen ◽  
Maria Bjerk ◽  
Asger Roer Pedersen ◽  
Jørgen Feldbæk Nielsen ◽  
Lars Evald
Keyword(s):  
Aerobic Exercise ◽  
Acute Stroke ◽  
High Intensity ◽  
Cognitive Impairments ◽  
Controlled Trial ◽  
Control Group ◽  
Stroke Survivors ◽  
Trail Making Test ◽  
Low Intensity ◽  
Trail Making

Background: Aerobic exercise is an effective treatment to improve aerobic capacity following stroke and might also improve cognitive impairments in sub-acute stroke survivors. The aim of the study was to assess the effect of high-intensity aerobic exercise on cognitive impairments in sub-acute stroke survivors. Methods: A pilot, randomised controlled trial on the effects of aerobic exercise on cognitive impairments of stroke patients in the sub-acute (1-3 months) phase was conducted. Thirty patients with moderate cognitive impairments (maximum score of 5 on at least two items on the cognitive subscales of the Functional Independence Measure [FIM]) were included in the study and randomly assigned to either the intervention group – performing high-intensity aerobic exercise (above 70% of maximum heart rate), or the control group – performing low-intensity aerobic exercise (below 60%). Patients in both groups exercised for 50 min twice a week for 4 weeks. Primary neuropsychological outcome: Trail Making Test B. Results: Thirty stroke patients completed the interventions. The results showed that the high-intensity group, compared with the low-intensity group, achieved significant improvements on Trail Making Test B, which assesses processing speed and divided attention ( P = .04 after training and P = .01 at follow-up). However, the significant improvements on Trail Making Test B might relate to a ceiling effect in the control group. Conclusions: This study does not provide evidence to support that aerobic exercise can improve cognition in stroke survivors, even though significant improvement was revealed on the primary outcome in sub-acute stroke survivors following high-intensity aerobic exercise compared with low-intensity general exercise.

Effects of Aerobic Exercise on the Functional Capacity and Cardiovascular Efficiency of Elderly Post-CABG Patients

1997 ◽  
Vol 5 (2) ◽  
pp. 87-97 ◽  
Author(s):  
Darryn S. Willoughby ◽  
Mark Roozen ◽  
Randall Barnes
Keyword(s):  
Blood Pressure ◽  
Aerobic Exercise ◽  
Functional Capacity ◽  
High Intensity ◽  
Bypass Graft ◽  
Rate Pressure Product ◽  
Control Group ◽  
Low Intensity ◽  
Arterial Blood ◽  
Cabg Patients

This study attempted to determine the effects of 12-week low- and high-intensity aerobic exercise programs on functional capacity and cardiovascular efficiency of elderly post-coronary artery bypass graft (CABG) patients. Time (Timemax). estimated maximum VO2 (VO2max), heart rate (HRmax), systolic blood pressure(SBPmax), estimated mean arterial blood pressure (MABPmax), and rate × pressure product (RPPmax) were assessed during graded exercise tests before and after 12 weeks of low-intensity (65% HRmax) and high-intensity (85% HRmax) exercise. Subjects (n = 92) were placed in either a low-intensity (LIEX), high-intensity (HIEX), or nonexercising control group (CON). LIEX and HIEX showed increases from pre- to postprogram for Timemax and VO2max. LIEX and HIEX showed decreases for SBPmax, MABPmax, and RPPmax. HIEX and LIEX produced greater improvements than CON for these four variables, while HIEX was superior to LIEX. It was concluded that 12 weeks of low- and high-intensity aerobic exercise can increase functional capacity and cardiovascular efficiency in elderly post-CABG patients; however, high-intensity exercise may produce greater improvements than low-intensity exercise.

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