نتایج جستجو برای: vis spectrophotometry
تعداد نتایج: 31365 فیلتر نتایج به سال:
Lidocaine HCl injection is a sterile product that easily contaminated when opened. The temperature and humidity in the storage conditions also affect quality of drug viewed from UV-Vis spectrophotometric absorption value. aimed this study to find out how effect on profile 2% lydocaine by spectrophotometry. used 27 ampoules lidocaine was qualitatively analyzed using lasted for 14 days first stor...
The complex-formation equilibria of the system Ni(II)/β-alaninehydroxamic acid (β-AlaHA, LH) have been studied in solution by using potentiometry, calorimetry, ESI mass spectrometry and UV-Visible spectrophotometry. A series of mononuclear and polynuclear species have been identified at different pH and for different Ni(II)/ligand ratios. Among the polymetallic species, we have identified the 1...
Microbial resistance to antibiotics is one of the biggest public health threats of the modern world. Antibiotic resistance is an area of much clinical relevance and therefore research that has the potential to identify agents that may circumvent it or treat resistant infections is paramount. Solution behavior of various fluoroquinolone (FQ) complexes with copper(II) in the presence and absence ...
This paper reports the first analytical approach carried out on two working palettes by Portuguese modernist master Almada Negreiros, found in 1991 behind old wood cabinets at DN building Lisbon. is only known occasion left color experiments done before starting to paint nearby walls and as such, it a unique opportunity analyze materials painting techniques that were originally used. The setup ...
One of the ways to prevent generative diseases is by using natural antioxidant compounds. The flavonoid compounds in flower parts M. gigantea have a role antioxidants. Thus study aimed test activity and levels flowers. was carried out UV-vis spectrophotometry 2,2-diphenyl-1-picrylhydrazyl assay 10% aluminum chloride potassium acetate, both tests quercetin as comparison. results this obtained IC...
The rate of displacement of the aqua ligands by three neutral nucleophiles (Nu) of different steric demands, namely thiourea (tu), N,N'-dimethylthiourea (dmtu) and N,N,N',N'-tetramethylthiourea (tmtu) and an anionic nucleophile (I(-)) in complexes of the form [{Pt(H(2)O)}(2)(N,N,N',N'-tetrakis(2-pyridylmethyl)-N(CH(2))(n)N](CF(3)SO(3))(4), n = 2 (En); 3 (Prop); 4 (But); 6 (Hex); 8 (Oct) and 10 ...
A method for the simultaneous spectrophotometric determination of the divalent ions of iron, cobalt, nickel and copper based on the formation of their complexes with 1,5-bis(di-2-pyridylmethylene) thiocarbonohydrazide (DPTH) is proposed. The resolution of quaternary mixtures of these metallic ions was accomplished by several chemometric approaches. A comparative study of the results obtained fo...
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