البريد الإلكترونى

  
   
استفسار


  
            

Delta Journal of Science Volume 12 (1988) Issue no. 1


CONTENTS


MATHEMATICS

The effect of anharmonic terms on the resonance of an oscillating system

Gad, Nabila A.; Abd El-Hady, Mona K.; El-Sheikh, Soheir S.

 

1

On a singular differential operator of the second order

A. A. Darwish, M.S. Selem, E.E. Abd El-Aal

 

19

Two semiclassifying theorems for metabelian groups

H. M. Hawidi, V. V. Sergeichuk

 

31

Isochronal surfaces for certaifr control system

M. Z. Ragab

 

44

Distribution of velocities in an oscillating gas bubble

N.M.H. Abdel Aziz-eHEMISTRY

 

60

Chemistry

H - NMR study of 3-mono - 3,4 - & 3,6 - substituted naphtho - (2,1 -b)- pyran -2- one derivatives

A. A. El-Khouly ; A.H. Bedair ; F.M. Aly and A.M. El-Agrody

69

H_ study of some substituted oxonaphtho - 1,3 - oxazocine derivatives

A. A. EI-Khouly j F.M. Aly j A.H. Bedair and A.M. EI-Agrody<

81

Some chemical aspects of 3-amino-l,2,4-triazole

M. El-Borai, A.A. El-Barbary, M. Fahmy and H.H. El-Naggar

93

Some reactions of 4-amino(hydrazino)-3-mercapto-5-aryl-1,2,4-triazole

A.A. El-Barbary, H.H. El-Naggar

102

Geology

Natural gamma ray spectral logging data as environment indicators

Nader H. El-Gendy

 

112

Foot by foot evolution in some chalky limestone Formations

Nader H. El-Gendy

 

136

Qualitative well log interpretation of some early cretaceous formations in sidi abdel rahman area

Nadar H. El-Gendy and Azz El-Din Saleh

 

161

Botany

Role of nicotinamide and salicylaldehyde on some growth parameters in wheat

Y. A. H. Mohamed, A. Sharaf El-Din and E. Foda

191

Influence of 2,4-D*-and CCC*-treatment on the pigment contents and photosynthetic activity of Hordeum vulgare and Sorghum bicolor

Hohamed El-Anwar H. Osman, El-Sayed A.M. Hamada, Awatef A. Mohsen and Hameda A. El-Sayed

 

242

Formation of auxins, gibberellins and vitamins by rhizosphere fungi and their effect on the growth of barley

Mostafa A. El-Sayed, Abd El-Raheem R. El-Shanshoury and Hanaa S. Fahmy

 

261

Levels of nucleic acids and some related enzymes in seedling of Beta vulgaris as influenced by some plant growth regulators

Y.A.H. Mohamed, B.A. Abdel-Ghaffar and M.A.H. El-Beheiry

 

276

Qualitative study on seed proteins of Thymelaea hirsuta L. populations

R. H. Sammour and A. Sharaf El-Din

 

290

Effectiveness of some insecticides against laboratory and field strains of the egyptian cotton leafworm Spodoptera littoralis (boisd.) during 1985 season of cotton cultivation

S.A. Abdallah and I.M. El-Nabarawy

 

313

ZOOLOGY

Some ecological observations on crustacean amphipods associated with marine fouling in Suez canal (Egypt)

M. H. Mona, F.M. Abou-Senna, F.A. Shoukr, and S. Ramadan

 

332

Effect of some insecticides on biomphalaria alexandrina the intermediate host of schistosoma mansoni in Egypt I. Toxicity and biological studies

El-Sheikh,H.; Hamid, M.E.; Mohamed, A.M. and Mongy, S.

 

356

Further contribution on the pancreas of the cichld fish, tilapia nilotica

Fouad A. Abou-Zaid and Siham B.Salem

380