TEZĂ DE DOCTORAT/PhD THESIS 1 Investeşte în oameni! Proiect cofinanţat din Fondul Social European prin Programul Operaţional Sectorial Dezvoltarea Resurselor Umane 2007 – 2013 Axa prioritară: 1. „Educaţia şi formarea profesională în sprijinul creşterii economice şi dezvoltării societăţii bazate pe cunoaştere” Domeniul major de intervenţie: 1.5 „Programe doctorale și post-doctorale în sprijinul cercetării” Titlul proiectului: „Programe doctorale şi postdoctorale pentru promovarea excelenţei în cercetare, dezvoltare şi inovare în domeniile prioritare – agronomic şi medical veterinar, ale societăţii bazate pe cunoaştere” Beneficiar: UNIVERSITATEA DE ȘTIINȚE AGRICOLE ȘI MEDICINĂ VETERINARĂ CLUJ-NAPOCA ID Proiect: 132765 Cod contract: POSDRU/159/1.5/S/132765 UNIVERSITY OF AGRICULTURAL SCIENCES AND VETERINARY MEDICINE OF CLUJ-NAPOCA AGRICULTURAL SCIENCES PHD SCHOOL OF ENGINEERING RESEARCH ON THE INFLUENCE OF PAULOWNIA SPECIES GERMINATION PROCESS UNDERGOING THE PHYSICAL FIELDS AND TRANSFER OF CS ISOTOPE SUMMARY PhD student RADU (ȚENTER) ANCUȚA CRISTINA Scientific coordinator: PROF.UNIV. DR. HORIA RADU CRIVEANU CLUJ-NAPOCA 2015
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UNIVERSITY OF AGRICULTURAL SCIENCES AND VETERINARY ... · GENERAL DESCRIPTION OF PAULOWNIA SPECIES (SIEBOLD & ZUCC.) 2.1 GENERAL CHARACTERISTICS OF PAULOWNIA (SIEBOLD & ZUCC.) SPECIES
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TEZĂ DE DOCTORAT/PhD THESIS
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Investeşte în oameni!Proiect cofinanţat din Fondul Social European prin Programul Operaţional Sectorial Dezvoltarea Resurselor Umane 2007 – 2013Axa prioritară: 1. „Educaţia şi formarea profesională în sprijinul creşterii economice şi dezvoltării societăţii bazate pecunoaştere”Domeniul major de intervenţie: 1.5 „Programe doctorale și post-doctorale în sprijinul cercetării”Titlul proiectului: „Programe doctorale şi postdoctorale pentru promovarea excelenţei în cercetare, dezvoltare şi inovare îndomeniile prioritare – agronomic şi medical veterinar, ale societăţii bazate pe cunoaştere”Beneficiar: UNIVERSITATEA DE ȘTIINȚE AGRICOLE ȘI MEDICINĂ VETERINARĂ CLUJ-NAPOCAID Proiect: 132765Cod contract: POSDRU/159/1.5/S/132765
UNIVERSITY OF AGRICULTURAL SCIENCES AND VETERINARYMEDICINE OF CLUJ-NAPOCA
AGRICULTURAL SCIENCES PHD SCHOOL OF ENGINEERING
RESEARCH ON THE INFLUENCE OF PAULOWNIA SPECIESGERMINATION PROCESS UNDERGOING THE PHYSICAL
Currently, in Romania, for several years, have grown some major projects with
financial support from the European Community for Paulownia plantations. There are
companies with developmental and implementation programs for these crops. Two
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private cultures can be mentioned in Cluj County, in the village Mociu and in the village
Bogata.
2.7. THE USAGE AREAS AND ECONOMIC VALUE
Paulownia wood is very light and durable when it is processed, making it ideal for
various uses (HU 1961). In East Asia, Paulownia wood has been used for centuries as
temple material crafted furniture, musical instruments, toys and cabinets. It can be used
as material for doors, windows, partition walls, ceilings, beams because it doesn’t bend.
There are temples over 100 years in which the wooden beams are still in good condition.
Extracts from fruits, leaves and wood are used in adjuvant treatment for
bronchitis. Fruit extracts decrease the frequency of asthma attacks (Kyoung, 1994). An
aqueous extract of the fruit and leaves regenerates the hair and stimulates the scalp,
causing hair growth. The extracted oils are prepared in the form of solutions or tablets
(Duke, 1985). Fruits presents a hypotensive effect, and wood extractions are used to treat
certain bacterial infections (Wysokinska and Rozga, 1998).
In recent decades around the world important projects have been initialized for the
production of biomass Paulownia wood, we can mention "Silva Tree" (2010) Energy
Fund "Investing in a biomass project in Panama reforestation".
CHAPTER III
GENERAL DESCRIPTION OF PHYSICAL FIELDS AND RADIOACTIVE
ELEMENTS
3.1 ELECTRIC FIELD, ELECTRICITY
Issac Newton, known as the one who put the fundamentals of mechanics, deepens
studies of electricity and magnetism. The basics of electricity being made and developed
by Charles Augustin de Coulomb, Michael Faraday and James Maxwell, give a new
interpretation of the concepts of classical physics, developing the ideas of physical fields.
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The existence of the electric field is highlighted by simple experiments, it can be
perceived by human senses. It is evidenced by the interaction of electrical charges. All
demonstrations of physicists emphasize acceleration of electric charges in space, that
creates electric field (Purcell, 1982).
3.2 MAGNETIC FIELD, MAGNETISM
Geomagnetism history includes famous people and their works which required
long years of intense study. William Gilbert, reasoned that the Earth itself is magnetic.
Crucial connection between electricity and magnetism was discovered and then explored
the greatest physicists of the XIX century, including Hans Ørsted, André Marie Ampere,
Faraday and James Clerk Maxwell Michael.
Hans Christian Oersted’s studies related to electricity, published in 1820, show
that the needle is deflected by electric current. This magnetic field is due to electrical
charges or electricity (Berkeley, 1981).
Ampere published its own model of magnetism in 1825, in which the magnetism
is due to current flow loops instead of dipoles of magnetic loading, different from
Poisson model. (Feyman 1969, Halliday and Resnik, 1975).
3.3 ELECTROMAGNETIC FIELD
The electromagnetic field can be seen as a combination of electric field and
magnetic field. If the electric field is produced by stationary tasks, and the magnetic field
by the movement of charged particles, namely electricity, than, the electromagnetic field
is created by the two fields. As mathematical description of Maxwell equations is played
during revolutionary electrodynamics. (Cook, 2002).
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(http://www.dannex.se/theory/1.html )
Fig.3.3.1 Electromagnetic field
3.4 SUBTLE FIELD, BIO-PHYTO-MODULATORS A.D.
Bio-Phyto-modulators, Ancu Dincă type, are devices for charging and energizing
and neutralizing harmful radiation, invented recently.
Bio-Phyto-modulators as operating principle are based on two types of effects,
which produce holographic radiation emitted by plants, the stimulus and the inhibition
effect.
Bio-Phyto-modulators DEA and DIEE are composed of crystals from 40 herbs,
crystals whose activation may shown in the presence of an electromagnetic field with
negative features (earth radiation or human biofield).
Fig.3.4.1 Bio-Phyto-modulators Ancu Dincă DEA and DIEE type
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3.5 GAMMA RADIATION AND RADIOACTIVE DISINTEGRATION
The beginnings of nuclear physics are quite recent, we can approximate at the
beginning of our century. About the discovery of radioactivity (the term comes from the
chemical element radium)one can say to have been accidentaly discovered in 1896. The
history of radioactive discovery is regarded as one of the most important discoveries of
our century, with scientific implications. Radiation led to the discovery of the atomic
nucleus by Rutherford and Bohr's model thus emerged, which imposed quantification on
atomic level. The nucleus generated a huge area of research and the study of the nucleus
properties led to the discovery of nuclear fission, of fusion and nuclear energy (Cosma
1996).
CHAPTER IV
THE AIM AND OBJECTIVES
One of the daily problems in the entire world right now is climate change, energy,
water supply, the counterbalance of the deprived areas, the inequalities caused by major
differences in development, and not least, the population's demands on nutrition and
some necessary living conditions.
The purpose of this work is the research in biophysics regarding the influences of
subtle, magnetic, electric and electromagnetic field, as well as those of radioactive
elements of the type Co and Cs on the plant material Paulownia species. The work aims a
careful observation of each individual field influence on the germination process, as well
as the the optimal choice of the experimental parameters, field strenght and doses and
exposure time.
The objectives are:
The exposure of Paulownia seeds to the action of the electric field action at
different field strengths,
The optimal graduation of exposure time in the electric field for the purpose of
analysis through germination indicators,
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The exposure of Paulownia seeds of low intensity magnetic field action,
The optimal graduation exposure time magnetic field analysis purposes by
indicators of germination,
The exposure of Paulownia seeds of green laser action to trace the evolution
process of germination and the establishment of indicators,
The irradiation of Paulownia seeds with low doses of gamma radiation, between
1Gy and 5Gy,
The irradiation of Paulownia seeds with high doses of gamma radiation, between 6
6Gy and 12Gy,
The exposure of Paulownia seeds to the subtle field through bio-phyto
modulators, tupe AD and type DEA and DIEE
Highlighting the changes occured by exposing the seeds to the physical and
radiation fields using FTIR spectrometry
The exposure of plant material – Paulownia cuttings – by planting in radioactive
infested soil with 137Cs isotope.
The pursuit of these objectives will be made through research methods chosen in
accordance with the literature and analyzing the germination process and germination
indicators: EG, IG, VG, TMG, and PFG, as well as statistical interpretation of the
results; comparing the influences of physical fields on germination by analyzing the
most relevant results, by optimizing field intensity and time exposure factors; the
spectrometric analysis of changes at the molecular level of Paulownia seeds
undergoing the physical fields, determining the transfer factor of radioisotope Cs
inside the Paulownia leaves.
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CHAPTER V
RESEARCH METHODS
5.1 METHOD FOR DETERMINATION OF GERMINATION
Germination is all morphological and physiological processes of transforming an
embryo into seed, from sleep to active growth state (Peterfi, 1972).
The whole process of germination was determined by five indicators, considered
the most representative and were calculated to evaluate their efficiency in data
interpretation (Anjum, and Bajwa, 2005).
The five selected indicators are:
Germination energy (EG)
Germination index (IG) (Marcu et al., 2013).
Germination speed (VG) (Ciapuso et al., 1997)( Marcu, 2013)
The medium germination time (TMG) (Sadeghi, 2011)
Germination capacity or final germination procent (PFG) is (Anjum and Bajwa,
2005).
These features are important not only in physiology and phytotechny, but also for
environmentalists because it is possible to predict the success of a species based on the
capacity of their seed harvesting by sprouting spontaneously in the natural (Ranal et al.,
2006) .
5.2 PLANT MATERIAL USED
Species Paulownia (Siebold & Zucc.) Was named in honor of Anna Paulowna,
daughter of Tsar Paul I of Russia. It is also called "princess tree" or "Empress Tree" for
the same reason.
Its leaves (Fig.5.2.1) are very large, with dimensions of about 15-25 cm, especially
young trees up to 50 cm, with long stalks of 10- 20 cm, edge evening (Booner, 2008).
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Fig.5.2.1 Paulownia leaves
After the first 8 or 10 years of life the tree starts to produce seeds and becomes very
prolific.
Fig.5.2.2 Dry fruit with seeds of Paulownia (Anna Laurent-picture Collected at Arnold
Arboretum, Boston)
Dried fruit can be picked and opened by hand before they scatter the seed. Theseeds are flat, thin, with wings, are about 1.5 to 3 mm long, and can be easily spread bywind when capsules fall from the tree. A fruit may contain about 1400-2800 seeds.
Being light and winged may be scattered at great distances, kilometer long(Baskin, 2001).
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Fig.5.2.3 Paulownia Seed
5.3 EXPOSURE OF PLANT MATERIAL TO THE ACTION OF ELECTRIC FIELD
Experimental research necessary for plant material exposure, in this case the seeds
of Paulownia, were carried out in two stages, first in the Babes-Bolyai University, Cluj-
Napoca, Faculty of Physics Laboratories of Electricity and Magnetism, the second stage
in the University of Agriculture and Veterinary Medicine, Cluj-Napoca, Faculty of
Horticulture in the biophysics lab.
Research has focused on the influence of the electric field. Therefore, the seeds
used were from the same sources and the same batch.
The first stage consisted of sorting viable seeds in batches of 100 pieces each.
Then it started to create the necessary electric field.
In order to obtain a homogeneous electric field, it was used a capacitor whose
plates have a diameter of 26 cm, and the distance was set to d = 0.073 m, as the electric
field is uniform in the space between the plates.
The voltage applied was gradually U1 = 20 V, = 18 V U2, U3 and U4 = 9 V = 5.5
V in order to obtain the required parameters of the experiment, namely, electric field
intensities of values: E1 = 274V / m, E2 = 250V / m, E3 = 125V / m, E4 = 75V / m.
Following studies, and the results previously obtained (Radu and colab., 2015) the
minutes, 60 minutes. Seed units of 100 pieces each, were exposed to different electric
field strengths, coupled with exposure time in the electric field. The chosen variant was
non-exposure, as the control variant, standard for comparison of variants of samples
exposed.
After conducting experimental scheme, the seed lots were placed between
capacitor fittings according to Fig.5.3.1 below.
Fig.5.3.1 Exposing Paulownia seeds to the electric field
5.4 EXPOSURE OF PLANT MATERIAL TO THE ACTION OF MAGNETIC FIELD
Experimental research needed were performed at the University of Agriculture andVeterinary Medicine, Cluj-Napoca, Faculty of Horticulture, in Biophysics Laboratoryand at the Babes-Bolyai University, in Cluj Napoca, Faculty of Physics, Electricity andMagnetism laboratories.
Taking into account the technical characteristics of the machine used during theexperiments, through the intensity of the electrical power of I1 = 0.25, we haveestablished a value of magnetic field strength of 1.8 Gs, I2 = 0.34 for 2.2 Gs, I3 = 0,4Afor 2.8 Gs, and I4 = 0,6A for 4.8 Gs, folowing study literature. The compass was set tomake alignment with the earth's magnetic field lines (Fig.5.4.1)
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Fig.5.4.1 Helmholtz coils and magnetic compass
Paulownia seeds were exposed to the magnetic field. Two different types ofexposure were carried out. The first variant has consisted of exposing the batches ofPaulownia seeds to a magnetic field of B = 2.2 Gs (Gauss) and four exposure time:10minutes, 20 minutes, 40 minutes and 60 minutes. The variant with 0 minutes exposuretime was considered the control variant.
The batches of 100 Paulownia seeds each were placed in a special place asoutlined in Fig.5.4.2 below.
Fig.5.4.2 Exposing Paulownia seeds to the magnetic field
After exposing the Paulownia seeds to magnetic field, the batches were
germinated, including the control batch, in special Linhardt dishes, in four repetitions.
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(Booner, 2008). It was created optimal humidity and temperature from -23 ℃ to 26 ℃.
(Fig.5.4.3)
5.5 LASER BEAM EXPOSURE OF PLANT MATERIAL
Germination indicators, when the plant material is exposed to the laser beam, were
determined following the specific procedures, in two steps. The first stage, held at the
National Institute of Research and Development of Isotopic and Molecular Technologies
Cluj-Napoca, in the Department of Molecular and Biomolecular Physics. The second
stage in the University of Agriculture and Veterinary Medicine, Cluj-Napoca, Faculty of
Horticulture in biophysics lab. It was aimed the stimulation batches of 100 species of
Paulownia seeds, by two similar methods, but the difference was the power and
wavelength of the laser beam, because the wavelengths in the visible spectrum are
different.
Fig.5.5.2 Exposing Paulownia seeds to green laser beam
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5.6 GAMMA RADIATION EXPOSURE OF PLANT MATERIAL
The experimental stage of plant material irradiation of the Paulownia seeds, took
place in the Babes-Bolyai University, Cluj-Napoca, Faculty of Physics, in the laboratory
in the Department of Physics and Nuclear Isotopes. It was used a gamma camera
Chamber 900, using as source isotope (_ ^ 60) Co. This unit was brought to the
laboratory in 1962,from the Bhabha Atomic Research Centre, India. (Fig.5.6.1)
At the time I started irradiating plant material, the dose rate for January was: 2013
D = 3,46Gy / h. From this value we started to calculate the exposure time required for
radiation doses suggested, as well as the flow variation related to time.
We considered low doses between 2 Gy 3 Gy, 4 Gy and 5 Gy and high doses
between 6 Gy, 10 Gy, 11 Gy and 12 Gy.
5.7 APLICATION OF BIO-PHYTO-MODULATORS A.D.
Applying bio-phyto modulators of type Ancu-Dinca and DIEE DEA was
performed after the randomly selection of 100 batches each, of seeds Paulownia, to four
repetitions each, as well as the control batch. On each envelope, with 100 seeds each,
was sealed bio-phyto-modulator DEA and similar to DIEE and separately were spaced
envelopes with control batches, allowing them to stand for 3days, germinated under
conditions of optimum light, temperature, and humidity.
Fig.5.7.1 Envelope with 100 Paulownia seeds to which was applied bio-phyto modulator
DIEE, DEA, and the envelope with control seeds
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5.8 SAMPLE PREPARATION FOR FTIR ANALYSIS (FOURIER TRANSFORM
INFRARED)
Paulownia seeds, which were initially exposed to physical fields (electric,
magnetic, electromagnetic, gamma irradiation, subtle) were milled to give a powder as
fine as possible (fig.5.8.1) and subsequently weighed.
The obtained powders were weighed and placed in a mold and compressed by
hydraulic press to remove air with the help of the device SPECAC, 10,000 Kg force for
30 seconds. The required pellets were formed and a potassium bromide pellet was also
formed, because it was required to measure the baseline background. Potassium bromide
KBr does not have absorption in the IR range between 4000 -650 .. After obtaining
the pellets, the determination of spectra FT-IR spectrometer was made, with a Jasco FT-
IR-4100.
5.9 THE EXPERIMENTAL PROTOCOL FOR HIGHLIGHTING CESIUM ISOTOPESIN PAULOWNIA PLANT MATERIAL
In the laboratory of Biophysics at the Faculty of Horticulture, University of
Agriculture and Veterinary Medicine, Cluj-Napoca, there were carried out experiments to
assess the transfer of Cesium isotope ( ) from a quantity of contaminated soil ,in the
plant material, namely in the Paulownia leaves (Constantinescu et al., 1988, Clements et
al., 2002).
The Paulownia plants were isolated in laboratory conditions, and were provided
with optimal conditions of temperature T = 20 to 25 ℃, light and humidity. After a period
of 3 months, Paulownia leaves were sectioned and were taken 6 samples from six
different plants. The leaves were weighed, then dried in an oven at 105 ℃ for 8 hours to
remove water. Subsequently they were weighed, and were brought to the table of 100 g /
sample.
The gamma spectrometric measurements were performed In the Faculty of
Environmental Sciences and Engineering, Gamma and Apha Spectrometry lab, the
Babes-Bolyai University, Cluj-Napoca.
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Fig.5.9.1 Analysis of samples with The HPGe detectors used within the Laboratory ofEnvironmental Radioactivity
CHAPTER VI
ANALYSIS OF RESULTS OBTAINED UNDER THE INFLUENCE OF
PHYSICAL FIELDS AND RADIOACTIVE ELEMENTS OF PAULOWNIA
SPECIES (SIEBOLD &ZUCC.)
6.1 ANALYSIS OF RESULTS OBTAINED UNDER THE INFLUENCE OF
ELECTRIC FIELD OF SEED GERMINATION PROCESS OF PAULOWNIA
SPECIES (SIEBOLD & ZUCC.)
6.1.1 Analysis of results obtained under the influence of an electric field intensity and six
time exposure, of the germination process of Paulownia species (Siebold & Zucc.)
In this case, the evolution in the process of germination of Paulownia seeds under
the influence of the electric field, was followed, using a single intensity of electrical field,
namely E = 274V / m, six different types of samples and the standard control sample for
comparing results.
From day 3 of measurements, one can observe that the batch with 20 minutes, 30
minutes and at 40 minutes exposure time has a faster progress than the other batches, as
outlined in Fig.6.1.1.1 below.
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Fig.6.1.1.1 The evolution of germination process of Paulownia seeds under influence of
electric field, one intensity, six time exposure.
Following this chart on the progress made during the 14-day germination records,
there is a rising trend above the evolution line of the control batch, of the six samples
used. Only in the early days there is overlap, but is insignificant.
6.2 ANALYSIS OF RESULTS OBTAINED UNDER THE INFLUENCE OF
MAGNETIC FIELD OF GERMINATION PROCESS OF PAULOWNIA SPECIES
SEEDS (SIEBOLD & ZUCC.)
6.2.1 Analysis of results obtained under the influence of a magnetic field intensity and
four time exposure of germination process of Paulownia species seeds (Thunb.) Stend.
Germination energy, calculated on the fifth day gives us important information
about the viability of seeds, the percentage of seedlings that have emerged. In Fig.
6.2.1.2, the germination energy of the 10 minutes batch, doesn’t increase procentage
compared to the control batch.
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Instead, when doubling the exposure time to 20 minutes, there is an increase of
14% compared to the control batch and again, when doubling the exposure time to 40
minutes, a percentage jump of 29%, which indicates us a stimulation of the seeds under
the influence of 2.2 Gs magnetic field action.
Instead, when doubling the time to 60 minutes, the process enters inhibition, but
still higher by 12% compared to control.
Fig. 6.2.1.2 Germination energy of Paulownia species seeds under the influence of
magnetic field, one intensity, four time exposure
6.3 ANALYSIS OF RESULTS OBTAINED UNDER THE INFLUENCE OF
ELECTROMAGNETIC RADIATION LASER BEAM OF GERMINATION
PROCESS OF PAULOWNIA SPECIES SEEDS (SIEBOLD & ZUCC.)
6.3.1 Analysis of results obtained under the influence of electromagnetic radiation green
laser beam of the germination process of Paulownia species seeds ((Siebold & Zucc.)
Germination index reaches its maximum value when exposing 5 minutes in the
second day, the first two days giving most units of germinated seeds (Fig. 6.3.1.3).
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Germination index has a similar linearity for the five samples tested under the action of
laser radiation.
Fig. 6.3.1.3 Germination index of Paulownia species seeds under influence of green laser
beam, six time exposure, in fourtheen days
The best germination index is the one with 110.73 seed units / no. of days,
exposure time, 5 minutes, followed by a gradual decline correlated with degrees of five
minutes, as follows: 102.8 seed units seeds / no. of days at 10 minutes, 85.00 seed units /
no. of days at 15 minutes, 80.67 seed units / no. of days at 20 minutes, 67.22 seed units /
no. of days at 25 minutes, 62.98 units seeds / no. of days at 30 minutes, these values
being superior to the control version of of 47.37 seed units / no. of days.
6.3.2 Analysis of results obtained under the influence of electromagnetic radiation red
laser beam of the germination process from Paulownia species seeds (Siebold & Zucc.)
Statistical analysis of results of germination energy and germination capacity, in
the case of red laser radiation action over the seeds of Paulownia species, are shown in
the following Tables 6.3.2.1, through analysis of influencing exposure time factors.
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The germination energy of Paulownia species was statistically assigned with very
significant positive differences from the average control on the red laser radiation
exposure, to all six time exposure, gradually every five minutes. The time factor has
influenced very significantly.
/Table6.3.2.1The influence of time exposure of Paulownia species seeds undergoing red laser
radiation on the germination energyNo. Variant Average
Germination EnergyMeanings
% Differencefrom control
1 Martor/control 20.00 0.00 Mt2 5 min. 44.00 24.00 ***3 10 min. 55.00 35.00 ***4 15 min. 52.00 32.00 ***5 20 min. 48.00 28.00 ***6 25 min. 31.00 11.00 ***7 30 min. 28.00 8.00 ***
DL(p 5%) 2.37DL(p 1%) 3.26DL(0.1%) 4.43
Table 6.3.2.2Comparisson between exposure time of Paulownia species seeds under red laser
radiation on germination energyClassification Variant Germination energy (%) Meaning
1 Martor/control 20.00 A2 30 min. 28.00 B3 25 min. 31.00 C4 5 min. 44.00 D5 20 min. 48.00 E6 15 min. 52.00 F7 10 min. 55.00 G
Average error Sx=0.80 (%)DS theoretical value : 2.37-2.69
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6.4 ANALYSIS OF RESULTS OBTAINED UNDER THE INFLUENCE OF GAMMA
RADIATION OF GERMINATION PROCESS OF PAULOWNIA SPECIES SEEDS
(SIEBOLD & ZUCC.)
6.4.1 Analysis of results obtained under the influence of low doses gamma radiation of
the germination process of Paulownia species seeds (Siebold & Zucc.)
The speed of germination analyzed presents an upward trend, with a peak in the
third day for 2 Gy,3 Gy and 4 Gy irradiation. The 5Gy lot speed germination rate is
superimposed with the control, on the top ascent. A period of descent until the end
follows, in its graphical form in Fig. 6.4.1.5 below.
Fig. 6.4.1.5 Viteza de germinare VG a seminţelor de Paulownia sub influenţa radiațiilorgamma de doze joase, în cele paisprezece zile
Fig. 6.4.1.5 The germination speed-GS of Paulownia species seeds under influence oflow doses gamma radiation,in fourtheen days
Germination speed rate, if low-dose irradiation, has the lowest value when sample
is irradiated with 5Gy, namely 8.57 no. of seeds / no. of days, with a unit lower than the
control value of 9.74 no. of seeds / no. of days. During the germination speed rate
analysis, the highest value obtained was with 2 Gy irradiated sample. The values obtained
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for 3 Gy and 4Gy irradiation are intermediary, upward over the control and under the
highest value of 2 Gy sample.
A significant difference was obtained for the samples with germination capacity of
5Gy 4Gy irradiation. Instead, it notes statistically significant differences at 3GY and very
significant at 2Gy.
Table6.4.1.3The influence of the low doses radioactivity field of Paulownia species seeds on
germination capacityNo. Variant Average Germination