218 resultados para CA2 STORES
Resumo:
,,CO2O3,CO2O3(Ginkgo biloba L.),,,CO270010-6,(P<0.05),,Ca2+/Mg2+-ATPase,;O38010-9,,,Ca2+/Mg2+-ATPase,;CO2O3(70010-6+8010-9),,(P<0.01),Ca2+-ATPase,Mg2+-ATPaseCO2O3,O3CO2
Resumo:
Fe()-As(),,,pHpH4,pH4,;pH4;Ca2+
Resumo:
Cu2+,pHCu2+Cu2+,;pH6Cu2+20 mg/L0.25 mm,,,Na+Ca2+Cu2+,0.1mol/L HCl96.1%Cu2+Thomas,10.94mg/gCu2+,
Resumo:
,pH,pH:(1),0.29 g/kg,101.56 g/kg,(EC)0.53 mS/cm,(EC>0.50 mS/cm);(2),6,pH6.55.5,pH(5.52),;(3)NO3-SO42-Cl-Ca2+Mg2+K+Na+,HCO3-,NO3-SO42-pH,Ca2+Na+pH
Resumo:
, , 1 , , 1 646.4 799.7g m- 2 , 2 2 84 .4 536.9g m- 2 . , , . , ( 0 1 0 cm) . , 1 , NH4 +Na+K+Ca2 +Mg2 + , NO3-Cl-SO4 2 -HPO4 2 - , Cl- HPO4 2 - ( P<0 .0 5) . 2 HPO4 2 - 1 1 /65. - 2 HPO4 2 - . , .
Resumo:
,15,8:(CK)(M)(N)+(N+M)(NP)+(NP+M)(NPK)+(NPK+M),(0~20cm):(Ca2-PCa8-PAl-PFe-P),;,NP+M,O-PCa10-P,(M);,NP+M,,(Ca2-PCa8-PAl-PFe-P),
Resumo:
(O3),O3:(O3,45 nmol/mol),O3(80±8)nmol/mol,,;Hill,18.36%~45.95%11.35%~20.84%;,7.50%~26.59%;ATP,Ca2+-ATPMg2+-ATPO3,O3
Resumo:
():,,,;(Ca10-PAl-PO-P),Ca8-P,Ca2-P,,>>>;,,Ca2-P,,O-P>Fe-P>Ca10-P>Al-P>Ca8-P>Ca2-P
Resumo:
,:,,>>>,,Ca2-P,Ca8-P,Ca10-P,Fe-P,Al-PO-P,Ca2-PCa8-P>>>>;Ca10-PFe-PAl-PO-P>>>>>,,,Ca2-PCa8-P;Ca10-PFe-PAl-PO-P,,,,,:>>>>
Resumo:
The establishment and optimization of in vitro primmorph formation from a Chinese sponge, Stylotella agminata (Ridley), collected from the South China Sea, were investigated. Our aims were to identify the key factors affecting primmorph formation in this species and to optimize the technique for developing an in vitro primmorph culture system. The size of dissociated cells from S. agminata is relatively small, in the range between 5 and 10 mum. Round-shaped primmorphs of less than 100 gm were formed 3 days after transferring the dissociated cells into seawater containing Ca2+ and Mg2+. The effect of various cell dissociation conditions, inoculum. cell density, concentration of antibiotics, pH, and temperature was further investigated upon the formation of primmorphs. The time required for primmorph formation, primmorph size distribution, and the proliferating capability were microscopically documented. Healthy sponge S. agminata, inoculum. cell density and culture temperature play a critical role for the successful formation of primmorphs and that the microbial contamination will have to be controlled. (C) 2002 Elsevier Science B.V. All rights reserved.
Resumo:
,2.5 g-1,,,Na+,Ca2+Mg2+;,60 cm,Ca2+Mg2+,Na+Ca2+Mg2+,Na+,,HCO3-;,,Cl-SO42-,C1-SO42-HCO3-,HCO3-pH0~20 cm,20 cmSARESP1.5 g-1,,
Resumo:
A plasticized Cr3+ ion sensor by incorporating 2,3,8,9-tetraphenyl-1,4,7,10-tetraazacyclododeca-1,3,7,9-tetraene (TTCT) ionophore exhibits a good potentiometric response for Cr3+ over a wide concentration range (1.010-6-1.010-1 M) with a slope of 19.5 mV per decade. The sensor response is stable for at least three months. Good selectivity for Cr3+ in comparison with alkali, alkaline earth, transition and heavy metal ions, and minimal interference are caused by Li+, Na+, K+, Co2+, Hg2+, Ca2+, Pb2+ and Zn2+ ions, which are known to interfere with other chromium membrane sensors. The TTCT-based electrode shows a fast response time (15 s), and can be used in aqueous solutions of pH 3 - 5.5. The proposed sensor was used for the potentiometric titration of Cr3+ with EDTA and for a direct potentiometric determination of Cr3+ content in environmental samples.
Resumo:
Thiosemicarbazone derivatives have been used as ion carriers for the preparation of PVC-matrix based mercury(II)-selective membrane sensors. The electrodes give near-Nernstian responses in the linear concentration range of 1.010-1-5.010-6 M with detection limits of the order of 10-6 M. The stable potentiometric signals are obtained within a short time period of 20-25s. The effect of different plasticizers has been studied and dioctylsebacate (DOS) found to give a better response in comparison to other plasticizers. Selectivity coefficient values (log KPotHg,M) have been evaluated using fixed interference method. Better selectivity for mercury(II) ions is observed over many of the monovalent (Na+, K+ and NH4+) and divalent ions (Mg2+, Ca2+, Zn2+, Pb2+, Ni2+, Co2+, etc.). The sensors have also been used as indicator electrodes in potentiometric titration of mercury(II) ions with EDTA and its determination in synthetic water samples.
