scholarly journals INFLUENCE OF THE MAGNETIC FIELD ON THE GERMINATION PROCESS OF TOSCA BEAN SEEDS (PHASEOLUS VULGARIS L.)

2018 ◽  
Vol 77 ◽  
pp. 103-116
Author(s):  
Anna Broszkiewicz ◽  
Jerzy Detyna ◽  
Henryk Bujak
Keyword(s):  
Magnetic Field ◽  
Phaseolus Vulgaris ◽  
Germination Rate ◽  
Phaseolus Vulgaris L ◽  
Static Magnetic Fields ◽  
Germination Process ◽  
Force Time ◽  
The Magnetic Field ◽  
Seeds Germination ◽  
Magnetic Field Force

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.

Effect of a static magnetic field onEscherichia coliadhesion and orientation

2016 ◽  
Vol 62 (11) ◽  
pp. 944-952 ◽  
Author(s):  
Lotfi Mhamdi ◽  
Nejib Mhamdi ◽  
Naceur Mhamdi ◽  
Philippe Lejeune ◽  
Nicole Jaffrezic ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Bacterial Adhesion ◽  
Parallel Magnetic Field ◽  
Field Orientation ◽  
Static Magnetic Fields ◽  
Preliminary Study ◽  
The Difference ◽  
The Magnetic Field

This preliminary study focused on the effect of exposure to 0.5 T static magnetic fields on Escherichia coli adhesion and orientation. We investigated the difference in bacterial adhesion on the surface of glass and indium tin oxide-coated glass when exposed to a magnetic field either perpendicular or parallel to the adhesion surface (vectors of magnetic induction are perpendicular or parallel to the adhesion surface, respectively). Control cultures were simultaneously grown under identical conditions but without exposure to the magnetic field. We observed a decrease in cell adhesion after exposure to the magnetic field. Orientation of bacteria cells was affected after exposure to a parallel magnetic field. On the other hand, no effect on the orientation of bacteria cells was observed after exposure to a perpendicular magnetic field.

Static magnetic fields in vacuum

2018 ◽  
Author(s):  
J. Pierrus
Keyword(s):  
Magnetic Field ◽  
Problem Solving ◽  
Magnetic Fields ◽  
Vector Potential ◽  
Scalar Potential ◽  
Multipole Expansion ◽  
Magnetic Vector Potential ◽  
Magnetic Dipoles ◽  
Static Magnetic Fields ◽  
The Magnetic Field

Wherever possible, an attempt has been made to structure this chapter along similar lines to Chapter 2 (its electrostatic counterpart). Maxwell’s magnetostatic equations are derived from Ampere’s experimental law of force. These results, along with the Biot–Savart law, are then used to determine the magnetic field B arising from various stationary current distributions. The magnetic vector potential A emerges naturally during our discussion, and it features prominently in questions throughout the remainder of this book. Also mentioned is the magnetic scalar potential. Although of lesser theoretical significance than the vector potential, the magnetic scalar potential can sometimes be an effective problem-solving device. Some examples of this are provided. This chapter concludes by making a multipole expansion of A and introducing the magnetic multipole moments of a bounded distribution of stationary currents. Several applications involving magnetic dipoles and magnetic quadrupoles are given.

scholarly journals EFFECTS OF SEED PRIMING WITH SODIUM CHLORIDE ON SEEDLING PERFORMANCE OF COMMON BEAN (PHASEOLUS VULGARIS L.) UNDER GREEN HOUSE CONDITION

2016 ◽  
Vol 4 (6) ◽  
pp. 222-228
Author(s):  
Roba Tufa ◽  
Jima Nego
Keyword(s):  
Sodium Chloride ◽  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Germination Rate ◽  
Shoot Length ◽  
Distilled Water ◽  
Seedling Height ◽  
Phaseolus Vulgaris L ◽  
Vigor Index ◽  
Nacl Concentration

This study was conducted at Jimma University College of Agriculture and Veterinary Medicine (JUCAVM) under controlled environmental conditions of greenhouse to determine the effects of different concentration of sodium chloride (NaCl) on germination and seedling growth of Phaseolus vulgaris L. Five concentrations of sodium chloride (o mol(distilled water), 0.1M, 0.2M,0.3M and 0.4M) with one control treatment of un-primed seeds were laid out  in completely randomized design (CRD) with three replication. Data were collected on standard germination, Rate of germination, Seedling height, Shoot length, Root length and Vigor index. The result revealed that different NaCl concentrations statistically (p≤0.05) affected standard germination, Rate of germination, Seedling height, Shoot length and Vigor index I of common bean crop. The highest value of all these parameters were obtained from seed primed with 0.1M NaCl as well as when the seed primed with distilled water. However, the lowest values of these parameters were recorded on the seed primed with the highest concentration (0.4M) of NaCl and un-primed seed. More of the examined parameters were decreased with increasing of NaCl concentration. In conclusion, priming seed with 0.1M of NaCl concentration enhanced germination and seedling performance of common bean.

MAGNETISM AND PLANT GROWTH: III. EFFECT ON GERMINATION AND EARLY GROWTH OF CORN AND BEANS

1965 ◽  
Vol 45 (6) ◽  
pp. 549-555 ◽  
Author(s):  
U. J. Pittman
Keyword(s):  
Magnetic Field ◽  
Zea Mays ◽  
Phaseolus Vulgaris ◽  
Plant Growth ◽  
Seedling Growth ◽  
Growth Response ◽  
Zea Mays L ◽  
Early Growth ◽  
Phaseolus Vulgaris L

Speed of germination and seedling growth of corn Zea mays L. and beans Phaseolus vulgaris L. were affected by pregermination exposure of the dry seed to an introduced magnetic field. Seed orientation and duration of pregermination exposure as well as temperature and seed orientation during germination affected total visible seedling growth. An endogenous, non-circadian growth response is indicated.

scholarly journals Effects of the electron spin on the nonlinear generation of quasi-static magnetic fields in a plasma

2010 ◽  
Vol 76 (6) ◽  
pp. 865-873 ◽  
Author(s):  
M. STEFAN ◽  
G. BRODIN ◽  
F. HAAS ◽  
M. MARKLUND
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electron Spin ◽  
High Frequency ◽  
Significant Contribution ◽  
Magnetic Field Generation ◽  
Temperature Plasma ◽  
Static Magnetic Fields ◽  
Nonlinear Generation ◽  
The Magnetic Field

AbstractThrough an extended kinetic model, we study the nonlinear generation of quasi-static magnetic fields by high-frequency fields in a plasma, taking into account the effects of the electron spin. It is found that although the largest part of the nonlinear current in a moderate density, moderate temperature plasma is due to the classical terms, the spin may still give a significant contribution to the magnetic field generation mechanism. Applications of our results are discussed.

Transmittal properties of a superconductor-ferromagnetic metamaterial subjected to magnetic fields generated by the permanent magnets

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542049
Author(s):  
H. Liu ◽  
X. T. Li ◽  
P. B. Zhou ◽  
H. Zhang ◽  
C. Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Permanent Magnets ◽  
Transformation Optics ◽  
Optimal Structure ◽  
Magnetic Shielding ◽  
Static Magnetic Fields ◽  
Coaxial Cylinders ◽  
Geometrical Distribution ◽  
The Magnetic Field

Superconductor-ferromagnetic (FN) metamaterial with effective magnetic shielding and transmittal properties that allow the cloaking and transferring of static magnetic fields has been introduced. Most metamaterials consist of different arrangements of superconducting and ferromagnetic materials whose performance and feasibility mainly depend on the involved materials, their geometrical distribution and the permeability of each. In this paper, combining the method of transformation optics with the design of metamaterials, we experimentally demonstrated a superconductor-FM metamaterial system, composed of two coaxial cylinders of different lengths, to investigate the influence of the length and the properties of superconducting material on the magnetic transferring properties of the magnetic field produced by the permanent magnets. By comparing the transmittal magnetic field of different cases, the optimal structure has been ultimately achieved in terms of calculating the transmitted magnetic field ratios. The insights attained by the present study are aimed to provide useful implications for the design of wireless energy transmission and increasing the efficiency of magnetic transmittal devices.

scholarly journals Скачкообразные процессы магнитного разупорядочения, стимулированные магнитным полем в системах со структурной неустойчивостью

2020 ◽  
Vol 62 (5) ◽  
pp. 710
Author(s):  
В.И. Вальков ◽  
А.В. Головчан ◽  
В.В. Коледов ◽  
Б.М. Тодрис ◽  
В.И. Митюк
Keyword(s):  
Magnetic Field ◽  
Phase Transitions ◽  
Static Magnetic Fields ◽  
First Order ◽  
Temperature Dependences ◽  
Second Order Transition ◽  
First Order Phase ◽  
Experimental Pressure ◽  
The Magnetic Field ◽  
Theoretical Results

A theoretical analysis of the features of structural and magnetostructural first-order phase transitions in magnetocaloric helimagnetic alloys of the Mn_{1-x}Cr_{x}NiGe system has been carried out. To describe the observed displacive structural transitions hex(P6_{3}/mmc)<->orth(P_{nma}), we used the local soft mode model in the approximation of a biased harmonic oscillator. In the absence of a magnetic field, the emergence of a helimagnetic order as a structurally induced second-order transition was described in the framework of the Heisenberg model, taking into account the dependence of the exchange integrals on the structural order parameters and elastic strains. In the presence of a magnetic field, it was found that the approximation of the characteristic temperatures for the helimagnetic HM(P_{nma}) and lability temperatures of the hexagonal paramagnetic PM(P6_{3}/mmc) states, due to the influence of the magnetic field, leads to the appearance of previously unexplored peripheral magnetostructural first-order phase transitions with insignificant magnetization jumps that increase with increasing magnetic induction.In this case, as the pressure increases to 4 kbar with constant induction of the magnetic field, the peripheral transitions transform into reversible first-order magnetostructural transitions, and at even higher pressures (10-14 kbar) into full-fledged first-order magnetostructural transitions with magnetization jumps comparable with maximum value of magnetization. Experimental pressure studies of the temperature dependences of magnetization in static magnetic fields with an induction of up to 1 T and a pressure of up to 14 kbar confirm the theoretical results.

scholarly journals Cladophora glomerata Extract and Static Magnetic Field Influences the Germination of Seeds and Multielemental Composition of Carrot

2020 ◽  
Vol 27 (4) ◽  
pp. 629-641
Author(s):  
Izabela Michalak ◽  
Annika Bartniczak ◽  
Sylwia Baśladyńska ◽  
Sylwia Lewandowska ◽  
Jerzy Detyna ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Cladophora Glomerata ◽  
New Methods ◽  
Algal Extract ◽  
Breaking Dormancy ◽  
Germination Ability ◽  
First Time ◽  
The Magnetic Field ◽  
Seeds Germination

Abstract As carrot seeds are notoriously slow to germinate and are often irregular in breaking dormancy, new methods of stimulation are still sought. This study examines for the first time the effect of an algal extract and static magnetic field (SMF) and their synergistic effect on carrot seeds germination. The algal extract, produced from freshwater macroalgae - Cladophora glomerata, was used directly to the paper substrate at a dose of 20, 40, 60, 80 and 100 %. The exposure of seeds to the magnetic field (500 mT and 1 T) was applied for 3, 6 and 12 min. The highest germination ability of carrot seedlings was observed for 20 and 80 % algal extract. The weakest germination was observed for the highest concentration of algal extract causing the highest amount of abnormal and dead seedlings. Parallel use of seeds stimulated with magnetic field and algal extract did not increase the number of germinated seeds significantly. Carrot’s seeds treated with algal extract showed increased content of elements - macro- Ca, K, Mg, S and microelements Cu, Fe, Mn and Zn. Future experiments are required to confirm the stimulation effect of algal extract (optimal concentration) and magnetic field (various induction values) on seeds germination.

scholarly journals Influence of the Static Magnetic Field and Algal Extract on the Germination of Soybean Seeds

2019 ◽  
Vol 17 (1) ◽  
pp. 516-525 ◽  
Author(s):  
Sylwia Lewandowska ◽  
Izabela Michalak ◽  
Katarzyna Niemczyk ◽  
Jerzy Detyna ◽  
Henryk Bujak ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Soybean Seeds ◽  
Cladophora Glomerata ◽  
Paper Substrate ◽  
Algal Extract ◽  
Germination Ability ◽  
First Time ◽  
The Magnetic Field ◽  
Seeds Germination

AbstractThis study examines the effect of a separate static magnetic field (SMF) and algal extract and their synergistic effect on soybean seeds germination. To our knowledge, this is the first time these kinds of factors were used for the biostimulation of soybean seeds germination. Soybean – Glycine max (L.) Merrill variety ‘Merlin’ was used in the present study. The exposure of seeds to the magnetic field was applied for 3, 6 and 12 min. The algal extract, produced from a freshwater green macroalga – Cladophora glomerata using an ultrasonic homogenizer, was used directly to the paper substrate at a dose of 10%. The highest germination ability of soybean seeds was observed in a group, where the magnetic field (12 min.) was used together with 10% of algal extract. However, it was very low – only 21%, which may have resulted from the seed dormancy. Future experiments on soybean seeds are required to confirm the stimulation effect of the magnetic field (various induction values) and algal extract on seeds germination.

Sign in / Sign up

Export Citation Format

Share Document