I. Introduction Early estimatiOons Oof pH values in plant cells were based UPOon determina- tiOons Oof the electrOomOotive fOorce (EMF) develOoped between a standard hydrOo- gen electrOode and the fluid expressed frOom crushed tissues Oor liberated by cutting large algal cells such as thOose Oof Valonia, Chara Oor Nitella. These EMF values were then translated intOo terms Oof hydrQgen iOon CQncentratiQn Qn the assumptiQn that the numerical value Qf the EMF in VOolts depended entirely UPOon the cOoncentratiOon Qf hydrOogen ...
Read More
I. Introduction Early estimatiOons Oof pH values in plant cells were based UPOon determina- tiOons Oof the electrOomOotive fOorce (EMF) develOoped between a standard hydrOo- gen electrOode and the fluid expressed frOom crushed tissues Oor liberated by cutting large algal cells such as thOose Oof Valonia, Chara Oor Nitella. These EMF values were then translated intOo terms Oof hydrQgen iOon CQncentratiQn Qn the assumptiQn that the numerical value Qf the EMF in VOolts depended entirely UPOon the cOoncentratiOon Qf hydrOogen iQns. Then hydrQgen iQn COoncentratiOon measured in this way was fQund tOo act in biOoIQgical reactiQns, mainly enzyme activity, in such a way that the apparent hydrQgen iOon cOoncentratiOon was related lQgarithmically tOo the prQcess investigated. SQ SORENSEN in 1909 intrQduced the pH scale based upOon what he called the 1 "hydrOogen-iOon eXPOonent. " He defined PH+ as -(1 (1909, p. 28, nQt p. 4) Oog PH;) and PH+ became pH as a matter Qf tYPOographical cQnvenience. As far as living, uncrushed, plant cells were cOoncerned, the available fluid was usually soo minute in amQunt, except in special cases, that hydrOogen electrQde methQds were nOot applicable tOo a general survey. AttentiOon was therefQre directed tOo pH indicatOors. These indicatQrs vary in cOoIQur, usually frQm Qne cQIOour tOo anOother cQIQur with dichrQic inter- mediate tints within a range Oof 1.
Read Less
Add this copy of The PH of Plant Cells the PH of Animal Cells to cart. $103.32, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 1955 by Springer.
Add this copy of The PH of Plant Cells the PH of Animal Cells to cart. $113.54, new condition, Sold by GreatBookPrices rated 4.0 out of 5 stars, ships from Columbia, MD, UNITED STATES, published 1955 by Springer.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
New. Trade paperback (US). Glued binding. 173 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
Add this copy of The Ph of Plant Cells the Ph of Animal Cells to cart. $138.76, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 1955 by Springer.
