78 research outputs found
Integrative effects of biostimulants and salinity on vegetables: Contribution of bioumik and Lithovit®-urea50 to improve salt-tolerance of tomato
Received: June 1st, 2021 ; Accepted: July 5th, 2021 ; Published: November 3rd, 2022 ; Correspondence: [email protected] separate and combined effect of lithovit-urea50 and bioumik was tested on
salt-stressed tomato crops. Salinity was induced using three different NaCl solutions (2, 4 and
8 dS m-1
). Under the salinity effect, all aspects of plant growth were inhibited. Total chlorophyll
and carotenoids reduced from mg g-1 FW and 1.1 mg g-1 FW at 2 dS m-1 to reach 1.01 mg g-1 FW
and 0.66 mg g-1 FW at 8 dS m-1 in control plants. Plants treated by the combination of both
products had the highest chlorophyll and carotenoids content with 2.24 mg g-1 FW and
1.34 mg g-1 FW, 1.88 mg g-1 FW and 1.05 mg g-1 FW, and 1.39 mg g-1 FW and 0.86 mg g-1 FW
respectively at 2, 4 and 8 dS m-1
. Treating plants by this combination maximized flower number,
fruit weight, yield and fruit diameter at 2 dS m-1 (17 flowers, 47.93 g, 431.1 g plant-1 and 3.23 cm
respectively) and 4 dS m-1 (15flowers, 36.45 g, 291.85 g plant-1 and 2.8 cm respectively). The
separate application of bioumik minimized cell electrolyte leakage at 2 dS m-1 (8.82%) compared
to control (11.43%). Additionally, plants treated by lithovit-urea and bioumik had the highest
relative water content with 107.3%, 96.5% and 91.2% respectively at 2, 4 and 8 dS m-1
. N, Ca
and Mg in roots were significantly the highest at 2 dS m-1 (4.5%, 2.6% and 0.5% respectively),
at 4 dS m-1 (3.74%, 2.49% and 0.48% respectively) and at 8 dS m-1 (3.21%, 2.61% and 0.32%
respectively). K content in roots was maximized following the separate application of bioumik
with 3.21% at 2 dS m-1 and 2.55% at 8 dS m-1
. Conclusively, lithovit-urea and bioumik helped
plants in tolerating salt-stress with an optimal effect obtained after their combination
The imperative of arachidonic acid in human reproduction.
We are presenting new evidence on essential fatty acids (EFA) in prenatal human development. We have demonstrated, for the first time, the detailed process of active selection of some fatty acids by the placenta (biomagnification) and rejection of others (bioreduction) and how this strategy is of supreme importance for understanding of the biology of human reproduction. The biomagnification process by the placenta is dominated by arachidonic acid (ArA) and its allies: di-homo-gamma-linolenic acid (DGLA), adrenic acid and ω6 docosapentaenoic acid. Stearic acid is similarly bio-magnified which is likely to provide for the sn-1 position in membrane synthesis. In contrast there is a bioreduction of oleic, linoleic and all ω3 precursors for docosahexaenoic acid (DHA), including eicosapentaenoic acid (EPA). Although DHA is biomagnified, the amplification from mother to fetus is small compared to ArA. We report on the dominant compartmentalisation of ArA from mother to fetal plasma, cell membranes of red cells, mono-nuclear cells, endothelium and the placenta. We conclude that ArA and its allies, play a paramount role in the development of the products of conception. It is plausible that inadequate provision of ArA may be relevant to the neuro-vascular complications of prematurity and neurodevelopmental disorders associated with premature birth. We present evidence of ArA's universal role from an identical arachidonic acid-based strategy observed in contrasting cultures. The dominance of ArA in the prenatal and in post-natal nutritional provision by human milk makes a compelling case for re-evaluation of its role, especially in reproductive biology
Relativistic graphene ratchet on semidisk Galton board
Using extensive Monte Carlo simulations we study numerically and analytically
a photogalvanic effect, or ratchet, of directed electron transport induced by a
microwave radiation on a semidisk Galton board of antidots in graphene. A
comparison between usual two-dimensional electron gas (2DEG) and electrons in
graphene shows that ratchet currents are comparable at very low temperatures.
However, a large mean free path in graphene should allow to have a strong
ratchet transport at room temperatures. Also in graphene the ratchet transport
emerges even for unpolarized radiation. These properties open promising
possibilities for room temperature graphene based sensitive photogalvanic
detectors of microwave and terahertz radiation.Comment: 4 pages, 4 figures. Research done at Quantware
http://www.quantware.ups-tlse.fr/. More detailed analysis is give
Quantum Metrology Triangle Experiments: A Status Review
Quantum Metrology Triangle experiments combine three quantum electrical
effects (the Josephson effect, the quantum Hall effect and the single-electron
transport effect) used in metrology. These experiments allow important
fundamental consistency tests on the validity of commonly assumed relations
between fundamental constants of nature and the quantum electrical effects.
This paper reviews the history, results and the present status and perspectives
of Quantum Metrology Triangle experiments. It also reflects on the possible
implications of results for the knowledge on fundamental constants and the
quantum electrical effects.Comment: 36 pages, 8 figure
Cardiac electrophysiologic interactions of bepridil, a new calcium antagonist, with enflurane, halothane, and isoflurane
Bepridil is an investigational calcium antagonist that also has fast sodium channel blocking and antidysrhythmic properties. In the present study, the potential interactions of bepridil with volatile anesthetics on cardiac electrophysiologic parameters were evaluated ] in open-chest dogs. Twenty-four dogs anesthetized with enflurane (n = 6), halothane (n = 6), isoflurane (n = 6), or chloralose (n = 6) received 2.5 mg/kg of bepridil intravenously (IV). Twenty-five additional dogs anesthetized with enflurane (n = 7), halothane (n = 6), isoflurane (n = 6), or chloralose (n = 6), received bepridil, 5.0 mg/kg, IV. Dogs anesthetized with cloralose served as controls. Cardiac electrophysiologic parameters were measured after the dogs were anesthetized and were repeated 5, 15, 30, 45, and 60 minutes after bepridil infusion. Plasma bepridil concentrations were also determined at the above time points. Synergy between bepridil and enflurane was demonstrated in the following cardiac electrophysiologic parameters: depression of sinus node function as evidenced by severe depression of sinus node automaticity and conduction; depression of atrioventricular function as evidenced by prolongation of the atrial--His bundle interval and the Wenckebach R-R interval; and, prolongation of the atrial effective refractory period. No synergy was demonstrated between bepridil and halothane or isoflurane when compared to bepridil's effects during chloralose anesthesia. It is concluded that significant synergistic cardiac electrophysiologic effects exist between bepridil and enflurane in dogs. It is recommended that caution be used when anesthetizing patients receiving bepridil with enflurane until human data on the use of this combination of pharmacologic agents is available.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/27283/1/0000299.pd
Assessment of Environmental and Economic Impacts of Municipal Solid Wastes Management System: A Case Study
In pursuance of the Saudi vision 2030, the Al-Hasa municipality has been allocating a total of US 29 per capita per year, which makes the project cost-effective. Thus, the research recommends continuing the MSW management project
Comparison of the effects of different surfactants on electrical parameters in Carbon Nanotube thin films
International audienc
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