نتایج جستجو برای: cn ratio
تعداد نتایج: 512031 فیلتر نتایج به سال:
The NRCS-CN (Natural Resources Conservation Service curve number) method, developed by the USDA (U.S. Department of Agriculture) is among most widely used for estimation surface runoff from watersheds. Ever since its introduction in 1950s, although it has been to a great extent engineers and hydrologists, applicability original procedure determine main parameter, number (CN), various regions wi...
Comparative study of adaptive techniques for denoising CN Tower lightning current derivative signals
a r t i c l e i n f o a b s t r a c t The lightning current derivative data recorded at the CN Tower during the past 18 years contain different kinds of noise and needs to be denoised for accurately determining the lightning current waveform parameters. It is usually a challenging task to denoise transient signals having large bandwidth without altering their waveshapes or shrinking their ampli...
Spectra with a high signal-to-noise ratio of 79 stars which are just below the main sequence turnoff of M71 are presented. They yield indices for the strength of the G band of CH and the ultraviolet CN band at 3885 Å. These indices are each to first order bimodal and they are anti-correlated. There are approximately equal numbers of CN weak/CH strong and CN strong/CH weak main sequence stars in...
One of the most frequent ways to widen adsorption range carbon nitride (CN) is add a well-known photosensitizer into its basic structure. So far, such attachments have been accomplished by using weak van der Waals forces. However, strong covalent bonding attach with CN yet be determined. Here, for first time, we covalently bonded porphyrin (5,10,15,20-tetrakis(4-(2,4-diamino-1,3,5-triazinyl) ph...
IMPORTANCE Assessing the ability of Alzheimer disease neuroimaging markers to predict short-term cognitive decline among clinically normal (CN) individuals is critical for upcoming secondary prevention trials using cognitive outcomes. OBJECTIVE To determine whether neuroimaging markers of β-amyloid (Aβ) and neurodegeneration (ND) are independently or synergistically associated with longitudin...
Mn and Fe BPMEN complexes showed excellent reactivity in catalytic oxidation with an excess of co-reagent (CH3COOH). In the straight line a cleaner system, volatile acetic acid was replaced by SiO2 (nano)particles two different sizes to which pending carboxylic functions were added (SiO2@COOH). The SiO2@COOH beads obtained functionalization nitrile (SiO2@CN) followed CN hydrolysis. All silica c...
We describe spectrophotometric determination of methemoglobin (Met-Hb) in blood by absorbance differences at two wavelengths (characteristic of the instrument used) in the 500-600 nm region. Blood is diluted 100- to 200-fold with a solution containing KCN and carbon monoxide to convert hemoglobin to carboxyhemoglobin and Met-Hb to cyanomethemoglobin (CN-Met-Hb). Carboxyhemoglobin has the same a...
Tetraethylammonium (2,2′-bipyridine)tetracyanidocobaltate(III) sesquihydrate acetonitrile solvate
The title complex, (C(8)H(20)N)[Co(CN)(4)(C(10)H(8)N(2))]·CH(3)CN·1.5H(2)O, consists of tetra-ethyl ammonium cations, mononuclear [Co(III)bpy(CN)(4)](-) anions and uncoordinated water and acetonitrile mol-ecules. The Co(III) atom is six-coordinated by two 2,2'-bipyridine (bpy) N atoms and four cyanide C atoms in a distorted octa-hedral geometry. The acute bite angle of the chelating bpy [82.28 ...
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