Wyniki wyszukiwania - Biblioteka Nauki

1

The effect of increased chloride [Cl-] content in nutrient solution on yield and quality of strawberry [Fragaria ananassa Duch.] fruits

100%

Esna-Ashari M. , Gholami M.

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nr 1

37-44

EN

Chloride and sodium are the main ions contributing to soil salinity in many regions but chloride is an essential element necessary for plant growth and development. It also controls the growth of some pathogens in plants. In this experiment, the effect of the chloride ion in nutrient solution on yield and fruit quality of two strawberry cultivars: 'Selva' and 'Camarosa' grown in hydroponic culture, was studied. Three kinds of nutrient solutions were used: 1) Hoagland-Arnon solution as control; 2) Hoagland-Arnon in which potassium nitrate was replaced with potassium chloride and ammonium nitrate was added as a nitrogen source and 3) the previous medium supplemented with 1.5 mmol l-1 magnesium chloride. Plant growth, total fruit yield, fruit firmness and leaf chlorophyll content were higher in plants grown in the second solution than the others, but there was no significant difference between the three solutions in terms of single fruit weight, soluble solids content and fruit dry weight. However, using 1.5 mmol l-1 magnesium chloride in a nutrient solution also increased the height of plants as well as total fruit production. The results showed that adding the chloride ion to the nutrient solution had no negative effects on fruit quality and leaf chlorophyll content.

PL

Chlorek i sód są głównymi jonami mającymi wpływ na zasolenie gleby w wielu regionach, ale to chlorek jest niezbędnym elementem potrzebnym do wzrostu i rozwoju roślin. Chlorek jest również odpowiedzialny za kontrolowanie wzrostu niektórych patogenów ro ślin. Do świadczenie miało na celu określenie wpływu jonu chlorkowego zawartego w po żywce na plon oraz jakość truskawek dwóch odmian: 'Selva' i 'Camarosa' hodowanych w kulturze hydroponicznej. Zastosowano trzy rodzaje pożywek: 1) pożywkę Hoagland-Arnon jako kontrolę, 2) pożywkę Hoagland- Arnon, w której azotan potasu zastał zastąpiony chlorkiem potasu a azotan amonu dodany jako źródło azotu, oraz 3) drugą pożywkę uzupełnioną chlorkiem magnezu w dawce 1,5 mmoll-1. Wzrost roślin, całkowity plon, jędrność owoców i zawartość chlorofilu w liściach byty najwyższe wśród roślin hodowanych na drugiej pożywce. Nie zaobserwowano jednak znacznych różnic między pożywkami pod względem masy pojedynczych owoców, zawartości ekstraktu oraz suchej masy owoców. Zastosowanie 1,5 mmol l-1 chlorku magnezu w pożywce zwiększyło natomiast wysoko ść roślin oraz całkowity plon owoców. Wyniki wykazał, że jon chlorkowy dodany do pożywki nie wpływa negatywnie na jakość owoców oraz zawartość chlorofilu w liściach.

2

Comments on: “Meta-analysis of association between Arg326Gln (rs1503185) and Gln276Pro (rs1566734) polymorphisms of PTPRJ gene and cancer risk”

100%

Gholami M. , Amoli M. M.

Journal of Applied Genetics

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2019

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tom 60

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nr 3-4

3

Measurements of freezing tolerance and their relationship with some biochemical and physiological parameters in seven olive cultivars

80%

Saadati S. , Baninasab B. , Mobli M. , Gholami M.

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nr 04

EN

The freezing tolerance of seven olive cultivars, including Amphisis, Conservallia, Koroneiki, Manzanilla, Gorgan, Shengeh, and Rashid, was compared, and its correlation with some biochemical and physiological factors was investigated. From each cultivar, leaf and stem samples were collected and sorted into two groups: the first was exposed to various freezing temperatures to indicate its freezing tolerance in terms of lethal temperature (LT₅₀) values by several approaches (electrolyte leakage, maximum quantum yield of PSII photochemistry, and tetrazolium staining test); the second was prepared for some biochemical and physiological parameter analyses. Of all cultivars, Amphisis and Shengeh showed the highest freezing tolerance, the maximum soluble carbohydrate and proline content, DPPH (1, 1-diphenyl–2-picrylhydrazyl) scavenging capacity, the minimum malondialdehyde (MDA), and relative water content (RWC). Conservallia, Gorgan, and Manzanilla cultivars could moderately tolerate freezing temperatures, whereas Rashid and Koroneiki cultivars turned out to be freezing-susceptible. In olive bark and leaf, LT₅₀ showed a negative correlation with soluble carbohydrate, proline content, and DPPH scavenging capacity and a positive correlation with MDA and RWC. Three indicators, i.e., LT₅₀, osmoregulant content, and DPPH scavenging capacity, can contribute to screening the freezing-tolerant olive cultivars.

4

Water-retention additives effects on plant water status and some physiological parameters of two olive cultivars under reduced irrigation regimes

80%

Farzi R. , Gholami M. , Baninasab B.

Acta Physiologiae Plantarum

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2017

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tom 39

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nr 06

5

Application of the central composite design to optimization of petroleum hydrocarbons removal from oilfield water using advanced oxidation process

70%

Farzadkia M. , Ghorbanian M. , Biglari H. , Gholami M. , Mehrizi E. A.

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tom Vol. 44, no. 4

22--30

EN

In the last few years, RSM method has been used widely to analyze, optimize and evaluate the interaction of independent factors for chemical, biochemical, and environmental processes. This study examined and evaluated the applicability of this method to manage Oilfield Produced Water to prevent marine environment due to the presence of hard degradable compounds by ozonation process. In this study simulated oil-water sample and a homogenizer reactor was used. The main reactor used in this study was impeinger equipped with sintered glass filter through which the treated oil-water was entered to reactor in the form of discontinuous flow. After ozonation and at the end of the reaction time (60 min), the concentration of oil hydrocarbons was determined by a gas chromatography device equipped with a flame ionization detector. The performance of the central composite design (CCD) approach was evaluated by the F-Value, P-Value, R2, lack of fit test and Adequate Precision parameters to determine the influence of effective factors, including ozonation time, pH, ozone dose, and TPH concentration on the TPH removal efficiency. The mean TPH efficiency obtained from the design of the 30-step experiment resulting from surface-response method was 49.903%, with a standard deviation of 12.47. This study showed the high power of model adopted from the central composite design to predict the hydrocarbons removal from oilfield water using advanced oxidation process, and it was proved that this model can be used alone to determine the design space nature.

6

Evaluation of optical quality and properties of Ga₀.₆₄In₀.₃₆N₀.₀₀₆As₀.₉₉₄ lattice matched to GaAs by using photoluminescence spectroscopy

70%

Gholami M. , Esmaeili M. , Haratizadeh H. , Holtz P. O. , Hammar M.

Opto-Electronics Review

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2009

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tom Vol. 17, No. 3

260-264

EN

We have investigated optical properties of Ga₀.₆₄In₀.₃₆N₀.₀₀₆As₀.₉₉₄GaAs single quantum-well structures using photoluminescence technique. We have found that nitrogen creates potential fluctuations in the InGaNAs structures, so it is the cause of trap centres in these structures and leads to localized excitons recombination dynamics. The near-band edge PL at 2 K exhibited a blueshift with an increase in excitation intensity of a sample but there is not such a shift in the PL peak position energy of same sample at 150 K. It has been found that PL spectra have a large full width at half maximum (FWHM) value at 2 K. These results are discussed in terms of carrier localization. Additionally, our results suggest decreasing PL integrated intensity in this structure, possibly due to non-radiative recombination. It has been shown that thermal annealing reduces the local strain created by nitrogen. By annealing process, a blue shifted emission can be observed.

7

Experimental and theoretical investigations of optical properties of GaN/AlGaN MQW nanostructures : impact of built-in polarization fields

51%

Esmaeili M. , Gholami M. , Haratizadeh H. , Monemar B. , Holtz P. O. , Kamiyama S. , Amano H. , Akasaki I.

Opto-Electronics Review

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2009

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tom Vol. 17, No. 4

293-299

EN

We report the results from detailed optical spectroscopy from MOCVD grown GaN/AlGaN multiple quantum wells (MQWs), as opposed to most previous studies where MBE was employed by means of photoluminescence (PL) technique. In this paper we will present theoretical and experimental results demonstrating how polarization induced electric fields and bound interface charges in GaN/AlGaN MQWs affect the emission peak energy, PL line shape, as well as the emission line width. Theoretically estimated fields in this work are consistent with experimental data. Transition energy of the heavy hole and electron ground state Ee-hh in GaN/AlGaN MQWs were calculated and it is found that it stays in good agreement with the experimental data.

8

Actin gene-based molecular typing of Trichomonas vaginalis clinical isolates from the North of Iran

41%

Hezarjaribi H. Z. , Taghavi M. , Saravi K. H. , Faridnia R. , Kalani H. , Mardani A. , Jorjani O. , Hosseinikhah Z. , Esboei B. R. , Gholami M. , Fakhar M.

Acta Parasitologica

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2020

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tom 65

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nr 4