Using of physical methods for increasing germination of seed of Salvia stepposa (Lamiaceae)

Author(s):  
M.Yu. Ishmuratova ◽  
◽  
D.V. Ageev ◽  
D.S. Baigarayev

The article presents the results of studying the effects of physical methods (magnetic field irradiation, bubbling), on the germination rate and energy of germination of Salvia stepposa seeds after storage for 1.5 years. The obtained results show that the seeds viability indices have increased reliably when irradiated with a single magnetic field for 3 days and bubbling for 24 hours. Bubbling is recognized as the best physical method of pre-treatment for Salvia stepposa seeds.

2011 ◽  
Vol 32 (6) ◽  
pp. 474-484 ◽  
Author(s):  
M.B. Shine ◽  
K.N. Guruprasad ◽  
Anjali Anand
Keyword(s):  

Author(s):  
Olfa Cheikh ◽  
Anis Elaoud ◽  
Hamza Ben Amor ◽  
Mahmoud Hozayn

Water scarcity and concentration of salts in soils are currently considered as threats to human life. The degradation of irrigation water quality is mainly due to overexploitation of natural resources, poor management and pollution. However, these factors limit the development of agriculture. Although the method of treating water by a magnetic field is a technique that has recently been introduced into different fields, including agriculture, it can be considered as a solution to reduce the salinity problems of irrigation water. On the other hand, magnetized water is the water exposed to magnetic rays which undergoes physical and chemical variations. The purpose of this study is to evaluate the effect of magnetic treatment the advantages of magnetically treated water on the rate of germination and the germinal faculty of cucumber seeds. In addition, experiments were performed with two magnetic devices: A1 = 0.5 Tesla; A2 = 0.29 Tesla. As a result, the application of a magnetic field influenced the parameters of the water, decreasing its pH. As well as, the increase in germination rate and the seed capacity of cucumber seeds before seedling. Statistical analysis showed that our experimental results are highly significant. Keywords: Static magnetic field, Germination, Cucumber seeds


2009 ◽  
Vol 5 ◽  
pp. 177-183 ◽  
Author(s):  
A. Susarrey-Arce ◽  
M. Herrera-Zaldívar ◽  
W. de la Cruz ◽  
Umapada Pal

Cathodoluminescence (CL) quenching was observed in ZnO nanostructures when doped with Yb by both chemical and physical methods. CL spectra of the samples revealed a defect emission at 2.25 eV in samples prepared by the chemical method, and an emission at 2.5 eV in samples prepared by the physical method. From the thermal treatment studies, it was found that oxygen vacancies are responsible for the 2.5 eV emission. Observed CL quenching in ZnO is explained through the participation of point defects in the energy transfer process from ZnO to Yb3+.


Author(s):  
Gayatri Gawande ◽  
◽  
Rucha Dandekar ◽  
Omparv Channa ◽  
Harshali Birari ◽  
...  

Membrane Bioreactors have proved to be a useful alternative to conventional activated sludge systems for wastewater treatment. Merits of membrane bioreactors include more compact design saving a significant amount of space and lower sludge production due to longer sludge retention time. This system unfortunately has a downside with it comes to excessive foaming. Membrane bioreactors often act as foam traps leading to overflowing, wastage of sludge and difficulty in process control. Pre-Treatment of wastewater has proven to significantly reduce foaming caused by surfactants. Generally, physical methods are considered more economical and operationally convenient compared to conventional techniques including chemical treatment and advanced techniques like biological treatment. Polyaluminium chloride as a coagulant is recommended as a chemical treatment due to economic and effectiveness considerations. It has been concluded that the remedies for foaming issue are case specific and should be determined by the causes of foaming. This paper aims at reviewing techniques to analyse the foaming phenomenon, causes of foaming and its remedies to manage or eliminate foam.


2018 ◽  
Vol 77 ◽  
pp. 103-116
Author(s):  
Anna Broszkiewicz ◽  
Jerzy Detyna ◽  
Henryk Bujak

The experiment was aimed at determining, whether exposure to static magnetic fields of intensities (1T,  2.5T, and 5T) stimulates the growth of Tosca bean seeds (Phaseolus vulgaris L.). Each treatment group in the  experiment underwent exposure to the magnetic field for a specific period of time, that is: 900s, 1800s, or  3600s. The measurements of root volumes were taken every 24 hours. The first measurement was taken after  96 hours since the beginning of germination. The collected data was analyzed using statistical methods.  The experiment allowed to determine that the magnetic field had a significant influence on the lowering of  bean seeds germination rate. The extent of this influence was dependent on the combination of factors: magnetic  field force- time of exposure.


2021 ◽  
Vol 17 (43) ◽  
pp. 89
Author(s):  
Yélemou Barthelemy ◽  
Tyano Abdoulaye ◽  
Koala Jonas ◽  
Zongo Rebecca Rebecca

The problem of the effectiveness of the established pre-treatments of seeds of local tree species is posed more and more often, with acuity. It appears necessary that studies are led to explore new methods of pre-treatment, or to update the old instructions applied, for a better success and at lower cost, of the production of seedlings. The present study concerned five species: Acacia nilotica, Adansonia digitata, Parkia biglobosa, Piliostigma reticulatum and Tamarindus indica. The methodology involved subjecting the seeds to three different pretreatments: (i) seeds treated with sulfuric acid (T0), (ii) seeds soaked in hot water for 24 hours (T1), (iii) seeds soaked in hot water for 48 hours (T2). For Acacia nilotica seeds, the different pretreatments did not result in statistically different germination rates. The germination rates are 77%, 65% and 62% (respectively for soaking in hot water for 48 hours, sulfuric acid and soaking in hot water for 24 hours). The different pretreatments also do not result in different germination rates for Tamarindus indica. Indeed, the germination rates after 30 days for this species are good but statistically identical (85% for the pretreatment with sulfuric acid and hot water for 24 hours). For Adansonia digitata, Parkia biglobosa and Piliostigma reticulatum, the sulfuric acid pretreatment gave the best germination rate (49%, 54% and 41% respectively). The results of this study may have practical consequences in terms of management of the different species studied. They show that immersing in boiling water and left for 24 hours and 48 hours yields fairly satisfactory germination rates for Acacia nilotica and Tamarindus indica seeds. These inexpensive techniques, accessible to all, can be considered as means to easily produce seedlings of these species.


Author(s):  
A Abdulrahman ◽  
M Atiku ◽  
A.S Ambursa ◽  
I Umar ◽  
M Muhammed ◽  
...  

This study was carried out at Kebbi State University of Science and Technology, Aliero, Kebbi State, to determine the effect of seed priming methods on the germination of Detarium microcarpum. The study was carried out in the Forestry Laboratory of the Faculty of Agriculture. The effectiveness of nine (9) different seed priming methods was assessed, control inclusive. Treatment 1 (TRT1) seeds were soaked in tap water for 48 hours, Treatment 2 (TRT2) seeds were mechanically scarified opposite to microphyle, treatment 3, 4, and 5 (TRT3, TRT4, TRT5) seeds were immersed in H2SO4 for 5, 10 and 15 minutes respectively, treatment 6, 7 and 8 (TRT6, TRT7 and TRT8) seeds were soaked in hot water (100oC) for 5, 10 and 15 minutes respectively and untreated seeds (CNTRL). Completely Randomized Design with three (3) replications was used. The data obtained were analyzed using one-way Analysis of Variance (ANOVA).The result revealed that seeds of D. microcarpum subjected to TRT2, TRT4, TRT5 and TRT8 recorded with highest Final Germination Percentage (FGP 100%) and was found to differ significantly (P<0.05) with other treatment and CNTRL recorded the lowest FGP (60%).Thus, TRT2 was significantly (P<0.05) enhanced the seed and germination rate of D. microcarpum with the highest FGP (100%), lowest MGT (6.67), highest GRI (15.05), highest GE (12.01), lower FDG (5.67) with maximum GI value (900). Based on the result, pre-treatment of T. indica seeds with H2SO4 is recommended for effective germination.


2011 ◽  
Vol 27 (10) ◽  
pp. 949-955 ◽  
Author(s):  
Soumaya Ghodbane ◽  
Salem Amara ◽  
Josiane Arnaud ◽  
Catherine Garrel ◽  
Henri Faure ◽  
...  

In the present study, we evaluate the effect of the co-exposure to static magnetic field (SMF) and selenium (Se) on the antioxidant vitamins A and E levels and some other parameters of oxidative stress in rat. Sub-acute exposure of male adult rats to a uniform SMF (128 mT, 1 h/day during 5 consecutive days) increased plasma activity of glutathione peroxidase (+35%) but decreased α-tocopherol (−67%) and retinol levels (−41%). SMF exposure failed to alter the plasmatic thiobarbituric acid-reactive species (TBARs), total thiol groups and selenium concentrations. Sub-chronic administration of Se (Na2SeO3, 0.2 mg/L, for 30 consecutive days, per os) ameliorated the antioxidant capacities in SMF-treated rats. Our investigation demonstrated that sub-acute exposure to SMF induced oxidative stress, which may be prevented by a pretreatment with selenium.


1954 ◽  
Vol 100 (419) ◽  
pp. 360-374 ◽  
Author(s):  
Denis Hill

It is only proper that I should begin this paper with a disclaimer. I am not a psychotherapist, nor am I one who has devoted much of his time to the physical methods of treatment. My only qualification to carry this burden at all is that I believe I am somewhat in a neutral position and have not been fired alone by either set of enthusiasms—neither those which activate the physical treatment experts, nor those which sustain the psychopathologists. Necessarily therefore what I have to say will be from a personal viewpoint, although of course not a detached one and I will apologize once for this and not again. The subject of this talk is obviously an important one and must be the concern of psychiatrists of all persuasions. Those who are psychotherapists cannot ignore the fact that the main mental disorders which constitute the serious core of psychiatric disability in the community are treated first and foremost by physical methods, insulin coma, E.C.T. and surgery, while those who are non-analytical psychiatrists cannot ignore the fact that the less serious but enormously more prevalent conditions are treated in the main by psychological methods. The question might be asked, are there then two types of psychiatric disorder, the one only treatable by a physical method, the other by a psychological method ? But this is a superficial view; with the greater sophistication of physical methods more and more patients who formerly were treated by psychotherapy are now subjected to some physical treatment, and conversely—and this is particularly evident from the American literature—more and more patients, particularly schizophrenics, formerly treated by insulin or surgery are now being subjected to psychoanalysis. Each side is therefore invading the territory of the other, but there is no common language or ground for discussion between them. Now of course there are many different forms of physical treatment, just as there are many different types of psychotherapy. Let me take the physical treatments first. We can I think divide them roughly into two classes. There are those which by their universal use for a special type of mental state or special group of symptoms have come to be regarded, rightly or wrongly, as almost a radical treatment for such conditions. For this group no psychopathological preconception regarding the patient, his problems, his methods of adaptation and defence are necessary. All that is needed is a clear statement of his symptomatology, its duration and course to enable the physician to determine the type of treatment. In this group therefore we can place insulin comas, E.C.T., and cerebral surgery of the leucotomy type. It is only necessary to demonstrate schizophrenic thought disorder and primary delusions of recent onset to arrive at the view that insulin treatment is advisable; on the other hand depressive affect, depressive sleep disorder and loss of weight, continuing beyond the reasonable period following a stress situation or the absence of a stress situation particularly in the involutional period of life will lead many to recommend E.C.T. without more ado. For chronic obsessional tension, rumination or distressing psychotic ideas interfering with adaptation, leucotomy or some modified form of surgery come to mind.


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