نتایج جستجو برای: yield reduction

تعداد نتایج: 674328  

Journal: :Cell reports physical science 2022

Anilines are major commodity chemicals used extensively in the production of pharmaceuticals, dyes, and polymers. However, typical methods for synthesizing anilines suffer from poor environmental sustainability. Here, we report an electrocatalytic route that works aqueous solution at room temperature pressure, where electrons protons required to reduce nitrobenzene precursors obtained water. Ex...

Journal: :Lasers in manufacturing and materials processing 2022

Abstract Nanostructured surfaces exhibit remarkable chemical, physical and microbiological properties have therefore various technical industrial applications. The ultrashort laser pulse irradiation (wavelength λ = 355 nm, duration Δt p 12 ps, repetition rate f 100 kHz) of copper samples with appropriate parameters results in the formation a micro- nanostructured surfaces. influence these hiera...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this research we have studied the effect of some transition-metals (cu, ag and au) substitutions on two-electron reduction potential of flavins by application of dft method. all geometries have been optimized at blyp level of theory and “6-31+g** + lanl2dz” mixed basis set. the frequency job at the same method and basis sets has been performed to obtain gibbs free energy of compounds. it h...

2009
Rojalin Tripathy A. K. Singh

Temperature and CO2 are two important parameters related to climate change, which affect crop yield. In this study, an attempt has been made to assess the impact of these two factors on the productivity of the four major cereal food crops (wheat, rice, maize and pearl millet) taking New Delhi as study area. This study also aims at identifying the most sensitive growth phase of these crops to th...

2007
I. Katsounaros G. Kyriacou

The influences of the potential, the concentration and the nature of the supporting electrolyte on the rate of the reduction of nitrate on tin were tudied by both voltammetry and constant potential electrolytic experiments. Both the rate of the reduction of nitrate and the yield of nitrogen increase as the negative potential increases from−1.8 to−2.8 V versus Ag/AgCl, hile the yield of nitrite ...

Journal: :journal of agricultural science and technology 2015
m. saeidi m. abdoli

terminal drought stress during grain filling period has recently become more common in the semiarid mediterranean regions, where wheat (triticum aestivum) is grown as an important winter cereal crop. the objective of this experiment was to study the effect of terminal drought stress on grain yield, gas exchange variables, and some physiological traits of nine bread wheat cultivars. an experimen...

Journal: :desert 2008
m. ghodsi m. r. jalal kamali d. mazaheri m. chaichi

abstract this research was conducted in toroq experimental field station, mashhad, iran, for two successive cropping seasons (2000-2002), using split plot experimental design based on complete randomized blocks with three replications. moisture stress treatments (at seven levels) were assigned to main plots, including: d1 ( full irrigation), d2 (no irrigation from one-leaf to double ridge) stag...

Journal: :journal of physical & theoretical chemistry 2007
mohammad bagher pasha zanousi mohammad saber tehrani ardeshir kermani jilla khalighie

5-aminosalicylic acid (5-asa) is currently prepared by electrochemical reduction of 5-nitrosalicylic acid (5-nsa) in acidic media. in this work, electrolytic reduction of 5-nsa in alkaline media is presented. reactionconditions and parameters such as anode and cathode electrodes, electrolyte type, reaction time, temperature,current, and the ph for isolation of product are investigated. the yiel...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید