P fluorescence

Ebook "Who's who in fluorescence 2005" is intended to reflect an author's progress in past years. The AIM number simply summates the impact number (from the ISI database) of Journals published in, in that year, multiplied by the frequency of those publications. From those who chose to participate, we can see most impressive AIM numbers, in some instances, greater than 80 for an individual year.

230p tachieuhoa 28-01-2024 5 2   Download

In this study, a novel spectrofluorometric assay based on p-cresol (4-methyl phenol) probe is developed for the measurement of HOBr scavenging activity. It is the first study involving the use of a p-cresol probe for the determination of the HOBr scavenging activity of biothiols. While the p-cresol probe (λex = 260 nm, λem = 305 nm) has fluorescence characteristics, its brominated derivatives emerging at the end of the oxidation reaction with HOBr do not show fluorescence.

10p tudichquannguyet 29-11-2021 7 0   Download

Chitosan passivated carbon nanodots (C-Dots CHIT) were synthesized from expired molasses via a simple and green thermal synthesis procedure. As-synthesized C-Dots were nitrogen-doped (NC-Dots CHIT) by posttreatment with liquid ammonia and used as nanoprobes for fluorometric detection of mercury ions (Hg(II) aq.). Fluorescence response of NC-Dots CHIT in the presence of mercury was evaluated and compared with that of the polyethylene glycol passivated C-Dots P EG . This sensing strategy using NC-Dots CHIT displayed a wide linear working range from 1.25 µg/mL to 43.

13p tudichquannguyet 29-11-2021 14 3   Download

Three new 2-component unsubstituted (4P), diiodo- (5P), and dibromo- (6P) distyryl-BODIPY-bridged cyclotriphosphazene dimers were designed and synthesized. The newly synthesized BODIPY-cyclotriphosphazene systems were characterized by 1 H, 13 C, and 31P NMR spectroscopy. The photophysical properties of the distryl-BODIPYs (4–6) and BODIPY-cyclotriphosphazene dyads (4P–6P) were studied by UV-Vis absorption and fluorescence emission spectroscopy.

13p tudichquannguyet 29-11-2021 11 1   Download

In rice seeds, the food reserves are mainly stored in the form of lipids, proteins and starch in the endosperm. The protein and starch stored during seed maturation and desiccation, will be broken into small fragments and degraded gradually during germination. Protein degradation process contributes their amino acids to the biosynthesis of new proteins while starch degrading provides energy for cell multiplication during germination (Yang et al., 2007).

5p trinhthamhodang1218 26-02-2021 7 1   Download

The aim of the study was to assess Pseudomonas sp. for their plant growth and antagonistic activity against most probable fungal pathogens associated with apple and pear plants viz., Dematophora sp., Fusarium sp., Pythium sp. and Sclerotium sp. These isolates were phenotypically and biochemically characterized from the rhizosphere of normal and replant sites of apple and pear from different locations of two districts of H.P i.e. Chamba and Mandi.

8p trinhthamhodang1216 19-11-2020 9 1   Download

In this investigation, the Total Reflection X-ray Fluorescence (TXRF) technique detected 24 elements: Al, P, S, Cl, K, Sr, Sc, Ti, Mn, Fe, Co, Cu, Zn, As, Br, Ba, La, Eu, Tb, Dy, Ta, Pb, Th, and U in Barbula indica moss collected at Baoloc (Vietnam) from November 2019 to March 2020. Factor analysis was used to explain contamination sources at the sampling sites.

12p viirene2711 03-10-2020 17 2   Download

In this study, we report for the first time that the phleomycin resistance gene can be employed as a selectable marker for genetic transformation of P. digitatum using A. tumefaciens. Our work shows that the transformation efficiency with the phleomycin resistance marker could achieve over 1000 transformants for 106 spores.

6p kethamoi7 15-08-2020 14 2   Download

In addition, the effects of explant age and lighting condition on shoot regeneration were also investigated. After 8 weeks of culture, the results showed that shoot regeneration rate (100%) and shoot multiplication coefficient (13.33) of the in vitro leaf-tTCL-4 were higher than those of other treatments and control. The shoot regeneration rate of P. edulis Sims. also varied with the change of explant age. The highest shoot regeneration rate (100%) was obtained from leaf explants of 1.5-month-old shoots after 8 weeks of culture.

9p nguyenxuankha_bevandan 14-08-2020 16 2   Download

Objective of the research was to validate the potential of Syzygium aromaticum and Kaempheria galanga against biofilm formation and plasmid borne drug resistance exhibited by Pseudomonas spp. Antimicrobial property of S.aromaticum and K.galanga on P.aeruginosa culture was assessed using the agar well diffusion method. Crystal violet assay was employed to determine the percentage inhibition of P.aeruginosa biofilm by the extracts following generation of biofilm on multiwell plates.

7p nguaconbaynhay6 23-06-2020 31 0   Download

In our present investigation, synthesis of nontoxic, eco friendly and cost effective silver nanoparticles, Phyllanthus acidus (P. acidus) was used as starting material. The influence of phyto-constituents present in aqueous extracts of Phyllanthus acidus was found to be effective in reduction of silver nitrate to free silver nanoparticles (PA-AgNPs).

9p vijiraiya2711 27-05-2020 8 1   Download

Vermi-compost being potential organic manure is gradually getting popularity among farmers and also farmers are gradually becoming well aware about the beneficial role of earthworm. Again while the focus is on reducing the use of chemicals in crop cultivation use of bio-agents has also got immense importance. Accordingly research work focusing on enrichment of vermi-compost with different beneficial bio-agents and its different aspects are the primary need.

9p trinhthamhodang1213 29-05-2020 7 0   Download

A field experiment was conducted at KVK, Kalburgi, on black soils. The zero tillage practices were followed since 3 years in five main plots and different reduced nutrient levels were imposed as subplots, by following split plot design. Every year same crop pigeonpea genotype TS-3R was grown. The prophylactic measures were undertaken against pests and diseases. Biological observations were analysed at 50 per cent flowering.

10p caygaocaolon4 04-04-2020 15 1   Download

The effect of soil solarization for a month in integration with seed biopriming with Trichoderma harzianum and Pseudomonas fluorescens and seed treatment with fungicides was studied in two flower crop nurseries of calendula and aster, raised in succession. Nursery beds were solarized for 30 days using polyethylene sheet of three colours viz. transparent white, black and red; and three thicknesses (50G, 200G and 400G). The damping-off incidence in first crop (Calendula) was minimum (28.

14p cothumenhmong1 08-12-2019 11 0   Download

New hexa-coordinated binuclear Ru(II) thiosemicarbazone complexes of the type {[(B)(EPh3)(CO)ClRu]2L} (where, E = P or As; B = PPh3 or AsPh3 or pyridine; L = mononucleating NS donor of N-substituted thiosemicarbazones) have been synthesized and characterized by elemental analysis, FT-IR, UV–vis and 31P{1 H} NMR cyclic voltammetric studies. The DNA-binding studies of Ru(II) complexes with calf thymus DNA (CT-DNA) were investigated by UV–vis, viscosity measurements, gel-electrophoresis and fluorescence spectroscopy.

11p kethamoi1 17-11-2019 16 3   Download

The present study aimed to determine the effects of gradual drought stress on Prunus mongolica seedlings. The growth and chlorophyll fluorescence of the seedlings were investigated under drought and control conditions. The short-term (21 day) decline in soil water content from 30.46% to 15.55% did not significantly influence the growth of P. mongolica seedlings but increased the height, sal diameter, crown, leaf number, stem mass, leaf mass, and root mass of the seedlings.

8p vikimsa 22-02-2019 24 0   Download

Fluorescence induction has been studied for a long time, but there are still questions concerning what the O–J–I–P kinetic steps represent. Most stud-ies agree that the O–J rise is related to photosystem II primary acceptor (QA) reduction, but several contradictory theories exist for the J–I and I–P rises.

8p inspiron33 23-03-2013 34 2   Download

The present study aimed to investigate the role played by the leaflets of the plasma membrane in the uptake of drugs into cells and in their extrusion by P-glycoprotein and multidrug resistance-associated protein 1. Drug accumulation was monitored by fluorescence resonance energy transfer from trimethylammonium-diphenyl-hexatriene (TMA-DPH) located at the outer leaflet to a rhodamine analog.

11p mobifone23 18-01-2013 38 3   Download

Hiện nay, các tác nhân gây bệnh đang trãi rộng trên nhiều loại cây trồng, trong khi đó các biện pháp phòng trừ hóa học ngày càng gây ô nhiễm môi trƣờng. Do đó việc sử dụng biện pháp sinh học nhằm bảo vệ thực vật là yêu cầu ngày càng cấp thiết. Trong bản thân đất và trên cây trồng, vi khuẩn, virus, nấm chúng đã tồn tại sẵn và có tính đối kháng, có khả năng ức chế lẫn nhau

27p zues04 20-06-2011 159 36   Download