نتایج جستجو برای: infrared spectrophotometer source

تعداد نتایج: 522348  

Journal: :Monthly Notices of the Royal Astronomical Society 2004

Journal: :Engineering Science and Technology, an International Journal 2023

In this study, the electronic design of a low-cost and portable spectrophotometer device capable analyzing in visible-near infrared region was established. The C#.NET-based user-friendly control software development machine learning algorithms for data classification as well comparison results were presented. When implementation studies are reviewed literature, two groups subjects become promin...

Journal: :journal of the iranian chemical research 0
yan jun du college of chemistry and environmental science, hebei university, baoding 071002, p.r.. china jing li yan college of chemistry and environmental science, hebei university, baoding 071002, p.r.. china mei ni college of chemistry and environmental science, hebei university, baoding 071002, p.r.. china bao an du college of chemistry and environmental science, hebei university, baoding 071002, p.r.. china

due to the binding of the –coo- group with the mercury (ii), gold nanoparticlesfunctionalized with glutathione can self-assemble to form a supermolecular network in the hac-naac buffer solution. the aggregation of functionalized gold nanoparticles and mercury (ii)caused the shift of maximum absorption peak of the uv-vis spectrum from 520 nm to 609 nm.based on this principle, a simple spectropho...

Journal: :Nuclear Instruments and Methods in Physics Research 1982

Journal: :Journal of physics 2023

Abstract The complex of cobalt(II) with iso-nicotinamide (intmd) was synthesized at a 1:1 mole ratio metal to ligand. formula obtained is [Co(intmd) 2 (H O) ]Cl .nH O (n = 0 or 1). Co(II)-intmd characterized by UV-Vis Spectrophotometer, Atomic Absorption Spectrophotometry (AAS), Differential Thermal Analyzer (DTA), Conductivity meter, Fourier-transform Infrared Spectroscopy (FTIR), Magnetic Sus...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی شاهرود 1390

در چند سال اخیر نیاز به استفاده از منابع انرژی تجدیدپذیر نظیر انرژی خورشیدی، پیل های سوختی و انرژی بادی افزایش یافته است. از این میان پیل های سوختی به دلیل عدم آلودگی، بازدهی بالا و مستقل بودن از شرایط آب و هوایی، منابع انرژی بسیار مفیدی هستند. روش مرسوم برای کنترل این پیل ها استفاده از یک مبدلdc/dc می باشد.در کاربردهای سه فاز مانند درایو موتورهای ac، یک اینورتر هم باید در مسیر مبدل dc/dc قرار ...

Journal: :Environmental pollution 2014
Reuben N Okparanma Frederic Coulon Abdul M Mouazen

In this study, we demonstrate that partial least-squares regression analysis with full cross-validation of spectral reflectance data estimates the amount of polycyclic aromatic hydrocarbons in petroleum-contaminated tropical rainforest soils. We applied the approach to 137 field-moist intact soil samples collected from three oil spill sites in Ogoniland in the Niger Delta province (5.317°N, 6.4...

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