Influence Of Silver Nitrate Research Articles

Influence of silver nitrate in obtaining highly luminescent sodium-doped carbon dots for white light emitting diodes

Luminescent metal-doping carbon dots (CDs) possess excellent optical properties for light-converting phosphors of white light emitting diode (LED). However, the photoluminescence quantum yields (PL QYs) of CDs still suffer from the trapping defect at the surface of CDs which may generate the detrimental nonradiative recombination centers. Herein, we developed an N doping method to enhance blue light emission of Na+-doped CDs via a modified solid-state reaction, using silver nitrate as nitrogen source. The blue PL intensity form Na+-doped CDs is improved by the increasing molar ratio of silver nitrate precursor. The obtained Na+ and N co-doping CDs exhibited 5-fold enhancement of PL intensity with a PL QYs up to 24% as compared to their undoped counterpart. Based on the temporal evolution of PL and surface structure characteristics, it suggested that the improvement of PL QYs derived from the elimination of the trapping defects at the surface of Na+-doped CDs. This is realized by the introduction of nitrate groups and Ag+ ions, which can reduce the formation of hydroxyl radicals related nonradiative recombination centers. Furthermore, the Na+ and N co-doped CDs is applied with (Gd,Y)3(Ga,Al)5O12: Ce3+ yellow phosphor on a commercial UV-LED chip, achieving strong cold white emission. Our finding provides a new idea to enhance blue PL QYs of Na+-doped CDs for their further potential applications in optoelectronic devices.

Influence of silver nitrate and copper sulfate on somatic embryogenesis, shoot morphogenesis, multiplication, and associated physiological biochemical changes in Gladiolus hybridus L.

Influence of silver nitrate and copper sulfate on somatic embryogenesis, shoot morphogenesis, multiplication, and associated physiological biochemical changes in Gladiolus hybridus L.

Effect of silver nitrate on some mechanical properties of heat polymerizing acrylic resins

Aim: The aimed study was to evaluate the influence of silver nitrate on surfacehardness and tensile strength of acrylic resins.Materials and methods: A total of 60 specimens were made from heat polymerizingresins. Two mechanical tests were utilized (surface hardness and tensile strength)and 4 experimental groups according to the concentration of silver nitrate used.The specimens without the use of silver nitrate were considered as control. Fortensile strength, all specimens were subjected to force till fracture. For surfacehardness, the specimens were tested via a durometer hardness tester. Allspecimens data were analyzed via ANOVA and Tukey tests.Results: The addition of silver nitrate to acrylic resins reduced significantly thetensile strength. Statistically, highly significant differences were found among allgroups (P≤0.001). Also, the difference between control and experimental groupswas highly significant (P≤0.001). For surface hardness, the silver nitrate improvedthe surface hardness of acrylics. Highly significant differences were statisticallyobserved between control and 900 ppm group (P≤0.001); and among all groups(P≤0.001)with exception that no significant differences between control and150ppm; and between 150ppm and 900ppm groups(P>0.05).Conclusion: The addition of silver nitrate to acrylics reduced significantly the tensilestrength and improved slightly the surface hardness.

Influence of silver nitrate and glutamine on in vitro organogenesis of Lota Bhot (Capsicum chinense Jacq.), an indigenous pungent pepper variety of Assam

Influence of silver nitrate and glutamine on in vitro organogenesis of Lota Bhot (Capsicum chinense Jacq.), an indigenous pungent pepper variety of Assam

Morphological and Biomolecules Dynamics of Phytopathogenic Fungi Under Stress of Silver Nanoparticles

Antifungal impact of silver nanoparticles (AgNPs) was evaluated on the growth, morphological, and biomolecules dynamics of Fusarium culmorum and Alternaria alternata. It was revealed that the different concentrations of AgNPs caused inhibition of fungal growth and deformations of fungal structures especially at high concentrations 40 and 60 ppm of AgNPs. A. alternata conidiospores at 40 ppm of AgNPs was sharply deformed and their longitudinal sections disappeared. On the other hand, these fungi failed to produce conidiospores in the presence of 60 ppm of AgNPs but produced chlamydospores. The effect of AgNPs on amino and fatty acids of F. culmorum was investigated compared with the influence of silver nitrate (AgNO3). AgNPs at different applied concentrations stimulated the synthesis of the most detected amino acids including aspartic acid, threonine, serine, glutamic acid, glycine, alanine, valine, leucine, tyrosine, arginine, proline, and lysine. The concentration of detected amino acids increased with increasing AgNPs up to 60 ppm. Aspartic acid, serine, glycine, alanine, arginine, leucine, and proline concentrations were 11.52, 6.53, 21.51, 12.51, 27.34, 9.40, and 22.17 μg/ml compared with their concentrations 5.90, 0.34, 21.51, 12.51, 14.97, 6.86, and 9.91 μg/ml at 40 ppm of AgNPs and AgNO3, respectively. Numerous fatty acids were detected in low percentage in treated F. culmorum with AgNO3 or AgNPs compared with untreated (control). Only butyric was detected in high percentage (29.58 and 33.04% at 20 ppm of AgNPs and AgNO3, respectively) compared with their percentage 15.93% in control.

Potential influence of silver nitrate on callus cultures and indirect organogenesis of Solanum viarum Dunal- an important anticancer plant

Potential influence of silver nitrate on callus cultures and indirect organogenesis of Solanum viarum Dunal- an important anticancer plant

Influence of Silver Nitrate on Leaflet based Direct Regeneration inArachis hypogaeaL.

Peanut (Arachis hypogaea L.) family Leguminosae is one of the world’s most important oilseed crops. The effect of silver nitrate (AgNO3) on in vitro direct regeneration efficiency of leaflet explants was studied in two cvs ICG 7827 and 13942 of A. hypogaea. This study was conducted to explore the effect of silver nitrate (AgNO3) alone and also in combination with growth regulators, on multiple shoot formation and plantlet establishment from leaflet explants in peanut. The leaflet explants were cultured on shoot induction medium (SIM) containing MS salts with B5 vitamins fortified with AgNO3/BAP/KIN/TDZ alone, AgNO3 in combination with BAP/KIN/TDZ, and AgNO3+BAP+NAA/IAA. When AgNO3 added in combination with BAP+NAA/IAA, enhanced shoot buds induction was found in comparison to other combinations of PGRs used. Maximum average number of shoots (15.04±0.16) per regenerating explant was recorded with 86% of response at 2.0 mg/L AgNO3+10 mg/L BAP+1.0 mg/L NAA in cv ICG 7827 followed by 13.73±0.12 shoots/explant with 83% of response at 2.0 mg/L AgNO3+10 mg/L BAP +0.5 mg/L IAA in cv ICG13942. AgNO3 showed a positive and marked effect on direct enhanced level of multiple shoot induction from leaflet explants. The micro-shoots developed from leaflet explants were elongated on shoot elongation medium (SEM) fortified with 0.5 mg/L BAP. For in vitro rooting the elongated micro-shoots were transferred on to root induction medium (RIM) fortified with NAA/IBA/NAA+IBA and IBA+NAA. Maximum average number of roots (16.28±0.15) per shoot was observed with 90% of response at 1.0 mg/L NAA. The in vitro rooted plantlets were transferred into field. The survival percentage was found to be 90%.

Influence of Silver Nitrate onIn vitroPerformance of Microplants of Potato Cultivar ‘Kufri Himalini’

Kufri Himalini has benn recognized as a better cultivar of potato for cultivation in the north western and eastern hill regions. Quality and quantity seed production of potato has always been challenging task and tissue culture is one of the solutions to the problem. In vitro response of various genotypes differs and needs standardization for efficient multiplication. In the present study influence of silver nitrate was observed on shoot multiplication and quality of microplants. Highest shoot multiplication (14.07±0.50) and number of leaves per shoot (13.40±0.59) was observed at a concentration of 6 mgl−1 of silver nitrate added in MS medium in combination with GA3 (0.25 mgl−1) and CaP (2 mgl−1)

Synthesis and Characterization of Gold Nanoparticles with Plasmon Absorbance Wavelength Tunable from Visible to Near Infrared Region

Gold nanorods with localized surface plasmon resonance (LSPR) can be chemically synthesized. We systematically investigated the effects of reaction parameters and centrifugation on the fine tuning of the rod dimension in scale-up production (80–100 mL). Nanorods of absorption bands from 600–1050 nm were fabricated with precise control of the aspect ratio (AR) from 1.5 to 8.9. Although all chemicals are important in directing the nanostructure, silver ion concentration and seed/Au3+ ratio were the most effective variations to adjust the absorption wavelength. With a single surfactant under the influence of silver nitrate, short nanorods up to AR of 5 were synthesized with corresponding maximum absorption wavelength at 902 nm. To achieve higher aspect ratio with absorption band beyond 1,000 nm, two-surfactant growth solution was sought to further elongate the rod length. Centrifugation speed and times were found to exert significant influences on the final rod dimension, which is important during the purification process. In a relatively large quantity nanorod synthesis, even distribution and sufficient mixing of chemical ingredients play an essential role in determining the yield, uniformity, and stability of the final nanorod formation.

AgNO3 - a potential regulator of ethylene activity and plant growth modulator

The aim of this review is to critically analyze the role of silver nitrate (AgNO 3 ) in modulating plant growth and development. In recent years, basic studies on ethylene regulation opened new vistas for applied research in the area of micro-propagation, somatic embryogenesis, in vitro flowering, growth promotion, fruit ripening, and sex expression. Silver nitrate has proved to be a very potent inhibitor of ethylene action and is widely used in plant tissue culture. Few properties of silver nitrate such as easy availability, solubility in water, specificity and stability make it very useful for various applications in exploiting plant growth regulation and morphogenesis in vivo and in vitro . Silver ion mediated responses seem to be involved in polyamines, ethylene- and calcium- mediated pathways, and play a crucial role in regulating physiological process including morphogenesis. The molecular basis for regulation of morphogenesis under the influence of silver nitrate is completely lacking. This review compiles published reports of silver nitrate-mediated in vitro and in vivo studies and focuses on fundamental and applied aspects of plant growth modulation under the influence of silver nitrate.

Induction of in vitro flowering in Capsicum frutescens under the influence of silver nitrate and cobalt chloride and pollen transformation

The influence of silver nitrate (AgNO 3 ) and cobalt chloride (CoCl 2 ) on shoot multiplication and in vitro flowering in Capsicum frutescens Mill. was investigated. Exogenous administration of AgNO 3 and CoCl 2 at a concentration of 30 µM resulted in the maximum tissue response in terms of shoot length and number of shoots after 45 days culturing on MS medium. Both silver nitrate (40 µM) and cobalt chloride (30 µM) influenced in vitro flowering after 25 and 45 days respectively. This is the first report on in vitro flowering in C. frutescens. The study also demonstrated successful transformation of pollen obtained from the in vitro flowers. Since capsicum is highly recalcitrant to in vitro plant regeneration, the results of the study may be highly useful in transformation of capsicum using germ free in vitro flowers.

Induction of in vitro flowering in Capsicum frutescens under the influence of silver nitrate and cobalt chloride and pollen transformation

Induction of in vitro flowering in Capsicum frutescens under the influence of silver nitrate and cobalt chloride and pollen transformation

Influence of silver nitrate (ethylene inhibitor) on cucumber in vitro shoot regeneration

The effect of addition of silver nitrate (AgNO3) on organogenesis of proximal and distal cotyledon and hypocotyl explants of five cucumber (Cucumis sativus L.) cultivars was investigated. Distal cotyledon and hypocotyl were unresponsive while only poor shoot regeneration was observed in proximal cotyledon and hypocotyl explants of all cucumber cultivars. The addition of different concentrations of AgNO3 (10, 30 and 50 µM) to the medium, however, induced shoot regeneration in distal cotyledon except Suyo Long cultivar and effectively increased shoot regeneration response as well as the number of shoots per explant in proximal cotyledon and hypocotyl of all cucumber cultivars.

Plant regeneration from peduncle segments of oil seed Brassica species: Influence of silver nitrate and silver thiosulfate

Cultured peduncle segments of B. juncea, B. campestris, B. napus, B. nigra and B. carinata produced shoot buds on Murashige and Skoog medium supplemented with benzyladenine and 1-naphthalene acetic acid. Supplementation of the media with 30 µm silver nitrate or silver thiosulfate enhanced the frequency of shoot regeneration. The regenerated shoots could be rooted at a frequency of 95% and transferred to soil where 75% survived and set seed.

The Synergistic Effect of Natural Rubber on the Crystallization of Lithium Poly(Isoprene)S (Coral Rubber)

Abstract The influence of silver nitrate on the crystallization of poly(isoprene)s has been demonstrated as well as the synergistic effect of natural rubber on the crystallization of lithium catalyzed poly(isoprene). This synergism does not appear to be a “seeding” effect in the strictly definitive sense, since no seed crystals are actually added. In this case a better description of this effect might be cocrystallization where nucleation is promoted by the addition of a quantity of a highly regular similar species. Actually there is a good probability that the nucleating crystals themselves contain segments of the synthetic poly(isoprene). This conclusion is supported by the data shown in Figure 6 for a 50/50 mixture of natural rubber and a noncrystallizable Alfin polymer. The dilato meter curve for this mixture indicates that the 50 per cent non-crystallizable polymer has a slight retarding effect on the induction period for the crystallization of the natural rubber but the crystallization rate of the natural rubber in the 50/50 mixture is quite rapid up to the total volume change expected for natural rubber portion of the mixture. However, in the presence of 50 per cent of a crystallizable lithium poly(isoprene) (also shown in Figure 6), the crystallization rate of this mixture is much slower due to co crystallization. The proposed change from head-tail cis-1,4 addition to tail-head cis-4,1 addition whenever a 3,4 unit is introduced into the polymer chain seems to explain the experimental crystallinity data obtained in these studies. In addition, it raises some questions about the polymerization mechanisms involved and resulting from the orientation of a 3,4 unit being added to the growing end of a polydienyl chain.