The influence of low-frequency laser emission on phyto- and zooplankton productivity properties

2020 ◽  
Vol 12 (2) ◽  
pp. 196-201
Author(s):  
Lidiia Khuda ◽  
Larysa Cheban ◽  
Oleksii Khudyi
Keyword(s):  
Population Density ◽  
Catalase Activity ◽  
Laser Emission ◽  
Low Frequency ◽  
Positive Influence ◽  
The Other ◽  
Control Group ◽  
Microalgae Biomass ◽  
Frequency Laser ◽  
Positive Effect

We studied the possibility of using low frequency laser emission to improve production properties of feed hydrobionts, in particular microalgae Desmodesmus armatus and Daphnia magna, which are highly applied in aquaculture. It was shown that low-frequency laser emission with the wavelength 650 nm has a positive influence on production properties of both phyto- and zooplankton. In 24 hours the biomass of irradiated D. armatus was 25% larger than non-irradiated one. Meanwhile, application λ 420 and 530 nm did not show credible accumulation of microalgae biomass. If it comes to daphnia, positive dynamic in population density enlarging was observed only since 5-7th day of cultivation, depending on emission exposition. Differences in low-frequency laser emission with λ 420 and 530 efficacy on D. magna production properties were observed while using different exposition. Thus, maximal culture density was observed when λ 420 nm for 90 s and λ 650 nm for 60 s were applied. Longer irradiation with red laser did not have positive effect. It was established that in daphnia tissues, which were influenced by λ 420 nm laser emission, TBA-active products were accumulating more. Meanwhile, for daphnias, which were irradiated with red laser, TBA amount was not different from the control group one. Catalase activity increased while applying λ 650 nm laser emission. On the other hand, λ 420 nm did not cause credible increasing of catalase activity in comparison with control group. Taking received results about photobiological effects of low-frequency laser emission on D. armatus and D. magna into consideration, both biomasses enlargement during co-cultivation can be obtained if wavelength 650 nm is used.

scholarly journals The Repercussion of Ai Chi on Aged People’s Balance

2014 ◽  
Vol 4 (3) ◽  
pp. 247-256
Author(s):  
Pablo Javier Olabe Sánchez ◽  
Andrés Martínez-Almagro Andreo
Keyword(s):  
Fall Prevention ◽  
Controlled Trial ◽  
Intervention Group ◽  
The Other ◽  
Control Group ◽  
Aged People ◽  
Randomized Controlled ◽  
Risk Of Fall ◽  
And Control ◽  
Positive Effect

To practice strength and balance activities are shown as useful tools to fall prevention by diverse metanalysis. On the other side, aquatic environment offers interesting properties for a therapeutic reeducation, being the Ai Chi one of its applications. Aim: To evaluate the repercussion of an Ai Chi programme on aged people’s balance. Method: A randomized controlled trial was developed comparing two groups formed by aged people with risk of fall according to the Timed Up & Go test. Intervention Group (IG) followed twelve Ai Chi sessions combined with their thermal programme; and Control Group (CG) just followed the thermal programme. Both groups spent two weeks in the Balneario of Archena (Murcia, Spain). Results: Both groups improve their balance; however, only the IG reached the non-risk of fall from the Timed Up & Go test. Conclusions: The combination of Ai Chi sessions and a thermal programme had a positive effect on aged people’s balance, showing a therapeutic and clinical relevance.

scholarly journals Effects of Low-Frequency Cranial Electrostimulation on the Rest-Activity Rhythm and Salivary Cortisol in Alzheimer's Disease

2003 ◽  
Vol 17 (2) ◽  
pp. 101-108 ◽  
Author(s):  
Erik Scherder ◽  
Dirk Knol ◽  
Eus van Someren ◽  
Jan-Berend Deijen ◽  
Rob Binnekade ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Activity Rhythm ◽  
Low Frequency ◽  
Control Group ◽  
Positive Effects ◽  
Alternative Research ◽  
Positive Effect ◽  
Experimental Group ◽  
Rest Activity

Objective. In previous studies, cranial electrostimulation (CES) had positive effects on sleep in depressed patients and in patients with vascular dementia. The present study examined the effects of low-frequency CES on the rest-activity rhythm and cortisol levels of patients with probable Alzheimer's disease (AD). Method. It was hypothesised that a decreased level of cortisol would parallel a positive effect of low-frequency CES on nocturnal restlessness. Sixteen AD patients were randomly assigned to an experimental group (n = 8) or a control group (n = 8). The experimental group was treated with CES, whereas the control group received sham stimulation, for 30 minutes a day, during 6 weeks. The rest-activity rhythm was assessed by actigraphy. Cortisol was measured repeatedly in the saliva throughout the day by means of salivette tubes. Results. Low-frequency CES did not improve the rest-activity rhythm in AD patients. Moreover, both groups showed an increase instead of a decrease in the level of cortisol. Conclusions: These preliminary results suggest that low-frequency CES has no positive effect on the rest-activity rhythm in AD patients. An alternative research design with high-frequency CES in AD is discussed.

scholarly journals PENGARUH MOTIVASI KERJA DAN KEMAMPUAN MENGAJAR GURUTERHADAP PRESTASI BELAJAR SISWA PADA GUGUS IISEKOLAH DASAR KECAMATAN KEBAYAKAN KABUPATEN ACEH TENGAH

2014 ◽  
Vol 14 (2) ◽  
Author(s):  
Fatmasari Fatmasari
Keyword(s):  
Student Achievement ◽  
Primary School ◽  
Significant Influence ◽  
Significant Relationship ◽  
Work Motivation ◽  
Positive Influence ◽  
The Other ◽  
Teaching Ability ◽  
Teachers And Students ◽  
Positive Effect

Motivation is one of the superior tools in order subordinate willing to work hard and smart in accord with the goal. If there is one achieve his or her motivation, then he or she tend to be continuously motivated. On the other hand, if there is one often fail to reach his or her motivation, then he or she keep preserving and keep make effort and pray till his or her motivation be reached or becomes hopeless. This study is aimed at knowing if there is a significant relationship between work motivation and teacher teaching ability toward the students’ achievement in Gugus II Primary School, Kebayakan Sub-district, Aceh Tengah. This study uses a quantitative approach with descriptive methods. The populations of the study were all the teachers and students at Gugus II Primary School Kebayakan sub-district, Aceh Tengah. The samples of the study were 31 teachers and 31 students. The results of this study indicate that the first hypothesis that there is a positive effect on work motivation with student achievement (rx1y = 0.670), second, there is a positive effect of the teachers teaching ability on the student achievement (rx2y = 0.691), there are three positive influence on work motivation and teachers teaching ability upon the achievement (rx1x2 = 0.856). The simultaneous analysis indicates that work motivation and the teachers teaching ability could affect the students’ achievement. Out of motivation variable hypothesis on the teacher high teaching ability has a significant influence on students’ achievement in Gugus II Primary School, Kebayakan sub-district, Aceh Tengah

scholarly journals The Effect of Crowdfunding Methods and Processes on Entrepreneurship Freedom of Innovation and Value of Creation: A Study in Business Incubators in Jordan

2018 ◽  
Vol 6 (4) ◽  
Author(s):  
Hanadi Salameh ◽  
Enad Quandah ◽  
Dr. Hanadi
Keyword(s):  
Research Methods ◽  
Quantitative Research ◽  
Positive Impact ◽  
Positive Influence ◽  
The Other ◽  
Business Incubators ◽  
Quantitative Research Methods ◽  
Other Hand ◽  
Positive Effect

This research investigates the effect of crowdfunding on entrepreneurship. The population of the study includes Jordanian entrepreneurs, (200) questionnaires were distributed among 200 Jordanian entrepreneurs; the (200) questionnaires were all collected. The researcher used the quantitative research methods in the form of simple liner regression and multi regression. The study confirms that there is a positive impact of crowdfunding on entrepreneurship in general as well as entrepreneurs’ freedom of innovation and value of creation. In addition, it was realized that out of the four investigated crowdfunding methods:  reward, pre-purchasing, donation, equity and lending, the pre-purchasing method has the most positive influence on entrepreneurship freedom of innovation and value of creation. On the other hand, reward, equity, and lending did not contribute any significant effect on entrepreneurship’s value of creation and freedom of innovation compared to the latter two. Furthermore, both crowdfunding processes of all-or- nothing and keep-it-all have significant effect on entrepreneurship with the latter process having a more significant effect than the former.  This study confirmed the positive effect of crowdfunding methods and processes on Jordanian entrepreneurship in term of value of creation and freedom of innovation.

scholarly journals The effect of Ferbanat L nano-fertilizer on the growing of Petunia x grandiflora ’Musica Blue’

2014 ◽  
Vol 20 (3-4) ◽  
Author(s):  
Sz. Kisvarga ◽  
R. Kerezsi ◽  
I. Kohut ◽  
A. Tillyné Mándy
Keyword(s):  
Chlorophyll Content ◽  
Shoot Length ◽  
The Other ◽  
Culture Period ◽  
Control Group ◽  
Flower Buds ◽  
Treatment Groups ◽  
Remarkable Increase ◽  
Size Number ◽  
Positive Effect

During our experiment, the effect of Ferbanat L concentrations were examined by Petunia x grandiflora ‘Musica Blue’ production. The leaf and shoot length, number of flower buds, diameter of flowers, and the date of appearing the first buds were measured. The solution of Ferbanat L in 0.1 % concentration was the most effective on shoot length (21.7 cm). Remarkable increase was observed by the other treatment groups as well comparing to the control group (5.6 cm), the plants treated with solution of Ferbanat L 0.2% (16.5 cm) and 0.3% (14.4 cm) had significant effect as well. The nano-fertilizer had not positive effect on the other examined parameters as leaf and flower size, number of flower buds or chlorophyll content. The culture period shortened five days.

scholarly journals Stereological and Histopathological Effects of Trigonella foenum-graecum Seeds on Rabbits Ovary

2020 ◽  
Vol 44 ((E0)) ◽  
pp. 28-32
Author(s):  
Tamara N. Dawood
Keyword(s):  
The Other ◽  
Control Group ◽  
Female Gonad ◽  
Trigonella Foenum Graecum ◽  
Histological Sections ◽  
Vascular Congestion ◽  
Hematoxylin And Eosin ◽  
Hematoxylin And Eosin Stain ◽  
Positive Effect ◽  
Histopathological Effects

This study aimed to investigate the impacts of the Trigonella foenum-graecum (T. foenum-graecum) seeds on the female gonad. A total of twenty local rabbits were used in this study; were divided into four groups (5 each): first group (G1) was considered as the control group. The second group (G2), third group (G3) and fourth group (G4) were fed daily1.5%, 3%, and 4.5% of T. foenum-graecum seeds respectively for 60 days (twice daily). At the end of the experiment, the animals were euthanized by diethyl ether (C2H52O). Then the abdomen was incised, and the samples of ovaries were collected and fixed by 10% neutral buffered formalin. The histological assessment was done with a paraffin embedding technique and the histological sections were stained with Hematoxylin and Eosin stain. The result showed that the numbers of primary and secondary follicles were significantly P< 0.05 decreased in G3and G4 compared with the control (G1) and G2. The numbers of Graafian follicles were significantly P<0.05 decreased G4 compared with other groups. The diameters of the primary, secondary, and Graafian follicles were significantly lower than the other groups. The thickness of the granulosa cell layer in G3and G4 were significantly lower than the other groups. The histological figures declared that the ovary of G2 was similar to that in G1. The histological sections of G3 and G4 were revealed marked cortical and medullary vascular congestion and focal hemorrhage; there were also marked follicular degeneration and cystic necrosis. The study concluded that the low concentration of T. foenum-graecum (fenugreek) seeds do not have any positive effect in terms of ovarian stimulation

scholarly journals Evaluating effects of electromagnetic fields on the total number and percentage of white blood cells in mice

2021 ◽  
Vol 5 (3) ◽  
pp. 01-07
Author(s):  
Sara Safaeian Laein ◽  
Bahareh Hormozi ◽  
Ali Neamati ◽  
Ghorban Safaeian Layen ◽  
Masoud Homayouni-Tabrizi
Keyword(s):  
Vitamin C ◽  
Electromagnetic Fields ◽  
Blood Cells ◽  
Electromagnetic Waves ◽  
White Blood Cells ◽  
Low Frequency ◽  
Antioxidant Property ◽  
The Other ◽  
Control Group ◽  
Antioxidant Effects

To evaluate the effects of electromagnetic waves on the total number and percentage of white blood cells and also antioxidant effects of vitamin C on the effects radiation, 24 male mice (Balb/c) were used: control under the influence of low frequency electromagnetic waves and under the influence of waves with vitamin C. Total number of white blood cells in under the influence waves group significantly increased compared to control group, and also under the influence waves group with vitamin C because its antioxidant property is able to prevent the increasing impact of electromagnetic waves. The percentage of white blood cells in the under influence waves group did not significantly change compared to the control group and also, the under influence waves group with vitamin C had no significant change compared to the other group. The percentage of neutrophils in samples of the under influence waves group had significant decrease compared to control group but in the under influence waves group with vitamin C compared to the other group, this vitamin C could prevent a significant reduction in percentage of neutrophils. Our findings indicated that low electromagnetic fields have caused significant changes in the total number of white blood cells and percentage of neutrophils in mice. In the group that received vitamin C injection, significant changes were observed in the total number of white blood cells and percentage of neutrophils relative to the group under the influence of low electromagnetic waves, which indicates that vitamin C could restore the mean total number of white blood cells and percentage of neutrophils to normal value.

scholarly journals MASIH TEPATKAH ROA SEBAGAI PENGUKURAN KINERJA KEUANGAN INDUSTRI ASURANSI DI INDONESIA?

2018 ◽  
Vol 11 (1) ◽  
pp. 81
Author(s):  
Oyo Sukarya ◽  
Farah Margaretha
Keyword(s):  
Financial Performance ◽  
External Factor ◽  
Positive Influence ◽  
The Other ◽  
Insurance Companies ◽  
Insurance Company ◽  
Significant Positive Effect ◽  
Negative Effect ◽  
Positive Effect ◽  
Significant Positive Influence

<p><em>The problem of this research was</em><em> the determinants of financial performance in insurance company in indonesia, both of internal and external factor. There are some factor</em><em>s</em><em> that influence positively and the other side  influence</em><em>s n</em><em>egatively on the financial performance.</em><em> </em><em>The objectives of this research was</em><em> </em><em>to examine the factors that affect the financial performance of insurance companies in Indonesia, which </em><em>was </em><em>viewed from profitability</em><em>. The methodology of this research was</em><strong><em> </em></strong><em>multiple regression. The object of research is 64 insurance companies listed in Otoritas Jasa Keuangan (OJK) period 2011-2015.</em><em> Finding and contribution in this research</em><strong><em> </em></strong><em>showed that leverage, equity, and management competence index proved to have a significant positive influence, </em><em>on </em><em>size, ownership and age</em><em>, and they were</em><em> proved to have a significant negative effect on retention ratio had a non-significant positive effect, and Underwriting Risk negatively influenced insignificantly into financial performace (ROA).</em><em> I</em><em>mplication in this research was</em><strong><em> </em></strong><em>that companies need to monitor the fluctuation of leverage and Equity, that positively influence</em><em> the financial performance</em><em>, </em><em>w</em><em>here leverage  depend</em><em>s</em><em> on ratio of debt to equity. In addition assets and ownership negatively affect</em><em> financial performance</em><em>, in order to monitor </em><em>the i</em><em>increase in line with the profit increase.</em><em></em></p>

scholarly journals Dynamics of proinflammatory cytokine serum levels in patients with acute inflammatory diseases of pelvic organs in the early stages of conservative treatment

2019 ◽  
Vol 9 (3-4) ◽  
pp. 612-616
Author(s):  
N. A. Burova ◽  
P. A. Soltys ◽  
N. A. Zharkin ◽  
M. S. Selikhova ◽  
N. I. Sviridova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Proinflammatory Cytokines ◽  
Inflammatory Diseases ◽  
Low Frequency ◽  
Serum Levels ◽  
Reproductive Age ◽  
Control Group ◽  
Necrosis Factor Alpha ◽  
Pelvic Organs ◽  
Frequency Laser

Dynamics of serum proinflammatory cytokines such as interleukins (IL)-1, -2 and -6, tumor necrosis factor alpha (TNFα) was examined in patients of reproductive age suffering from acute inflammatory diseases of the pelvic organs. Our study was carried out with female patients at hospital admission prior to therapy applied with conventional methods of treatment and improved treatment by using vaginal low-frequency laser in a constant continuous magnetic field. The data obtained were compared with serum cytokine level from 20 healthy female volunteers of reproductive age consulted on better contraception methods. It was found that cytokine profile of in patients with acute inflammatory processes in pelvic organs was characterized by a high level of proinflammatory cytokines. It was shown that patients receiving conventional treatment contained decreased level of serum IL-1, IL-2, IL-6 and TNFα displaying slight dynamics, which did not reach it in control group. This may contribute to ongoing inflammatory process, despite the positive clinical dynamics. In turn, imbalance of immune responses leads to a persistently impaired fertility in women and need to perform subsequent comprehensive rehabilitation measures. Moreover, patients applied with intravaginal low-frequency laser radiation in a constant magnetic field were found to contain serum TNFα < 100 pg/ml observed in 59.7% of cases, IL-6 level was lower than 20 pg/ml (prevalent in control group) found in 54.2% of cases. Serum IL-2 level was decreased by 3.5-fold compared to baseline, whereas for IL-1β it was higher than 100 pg/ml in as few as 23.6% patients. Such temporal pattern of inflammatory markers with rapid significant decrease of serum proinflammatory cytokines in patients with preformed pathogenic factors can reduce probability of connective tissue formation and activate their own repair as well as regenerative events. The results obtained allow to wider use combined physical interventional factors for therapy of patients with acute inflammatory diseases of the pelvic organs.

scholarly journals The presence of pamidronate in bone cement affects serum biochemical markers in the rat

2014 ◽  
Vol 58 (2) ◽  
pp. 295-299
Author(s):  
Łukasz Matuszewski ◽  
Anna Matuszewska ◽  
Magdalena Jaszek ◽  
Dawid Stefaniuk ◽  
Krzysztof Grzywnowicz ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Muscle Regeneration ◽  
Biochemical Markers ◽  
Wistar Rats ◽  
Positive Influence ◽  
Control Group ◽  
Control Groups ◽  
Male Wistar Rats ◽  
Serum Biochemical ◽  
Positive Effect

Abstract The main aim of the study was to assess whether the presence of biphosphate pamidronate (PA) in the cement implanted into the tibial bones had any effect on the chosen biochemical markers in rat’s serum characterising homeostasis. Forty adult male Wistar rats were divided into two control groups and two experimental groups. Tibial bone of rats in the experimental groups was implanted with PA-enriched cement, whereas the bone in control-group’s rats was implanted with cement without PA. Serum activities of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and creatine kinase (CK) were determined three and six weeks after the surgery. Statistically significant differences in the activities of AST and CK of the rats after implantation with non-enriched cement when compared to rats given PA-enriched cement implantation, were found. Six weeks after treatment, AST levels decreased significantly in rats with PA-enriched cement, whereas rats in the control group (implanted with non-enriched cement) demonstrated a significant increase in AST activity in comparison to the same values determined after three weeks and values of PA-enriched cement rats determined after six weeks. The activities of CK were higher in rats with PA-enriched implants than in the control group three weeks after surgery, but six weeks after the treatment, rats implanted with enriched cement reached lower values than animals implanted with non-enriched cement. The use of PA in the cement had also some positive effect on the homeostasis of the rats after the surgery and a positive influence on the post operative muscle regeneration process.

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