talat welad kan byedreso kimya le kam shahr bas. bas homa bedao yethaddo 3alem mashhoor 3alamy!
Li Weichi, Huang Runling, we Xiao Yan homa men Zhongshan Huaqiao Middle School fi Guangdong. homa lesa la2o korneb ahmar momken yekon no3 gedid men el acid-base indicator. homa 3ayzino yakhod makan el litmus paper.
"ehna et3alemna nefakar we nes2al as2ela 3an el hayah belnafsena," Li 2al, "ehna benshta8al kwayes ma3 ba3d."
El 3alem el britany Robert Boyle ektashaf este3mal el litmus paper men 300 sana. delwa2ty byesta3melo fi el tagarob fi kol el 3alam.
Bas lama el welad 3amalo tagarob fi el fasl el sheta elly fat, homa shafo en el litmus paper makansh beyethawal le azra2 2awi ma3 el base matter. sa3b ennak tshoof natiga wadha.
Hal hayeb2a fi indicator ahsan men el litmus paper? El talat welad 2araro yegarabo yelakooh!
Ezay? Raho yegama3o aktar men 40 nabat men el hada2e2 wel gardens wel soo2. ba3den tahano el wara2 wel ward wel soo2 3ashan yegibo el pigments menhom.
El welad khalato el pigments ma3 el acid wel base. 2a3ado shohoor beyetfarago be ehtimam 3ashan yeshofo anhi wara2 hayewari ahsan ta8yeer fi el loon. 2araro eno kan el litmus paper!
"Di awel rehla 3elmiya lena," Huang 2al, "bas khaletni 3ayez agarab aktar."
meen elly el talat welad kano 3ayzin yethadooh?
El modarres beta3 el kimya beta3hom. El nazer beta3hom. Robert Boyle Thomas Edison