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personal data approved: 2013. IX. 10.
Personal data
Lajos Helyes
name Lajos Helyes
year of birth 1956
name of institution
Szent István University, Gödöllő
Doctoral Council of the University
doctoral school SzIE Plant Science Doctoral (PhD) School (Core member)
Council of the Doctoral School (chairman)
SzIE Doctoral School of Biology Sciences (Announcer of research topic)
doktori képzéssel kapcsolatos munkájának megoszlása SzIE Plant Science Doctoral (PhD) School 78%
SzIE Doctoral School of Biology Sciences 22%
accreditation statement submitted to: Szent István University, Gödöllő
Contact details
E-mail address helyes.lajosmkk.szie.hu
phone number +36 28 522-071
Academic title
scientific degree, title Ph.D.
year degree was obtained 1996
discipline to which degree belongs plant breeding and botany
institution granting the degree SZENT ISTVÁN EGYETEM (to be translated)
scientific degree, title DSc
year degree was obtained 2008
discipline to which degree belongs plant breeding and botany
institution granting the degree HAS
Places of employment
1983 - Szent István University, Gödöllő
university professor or researcher
Thesis topic supervisor
number of doctoral students supervised until now 9
number of students who fulfilled course requirements 5
students who obtained their degrees:
Ferenc Lantos PhD 2011  PSDS
(50%) Sára Brandt PhD 2007  DSBS
Zoltán Pék PhD 2004  PSDS
students with degree granting in process:
András Bőcs PhD (2012)  PSDS
Gyula Márton Schober PhD (2013)  PSDS
present PhD students:
Zsuzsa Nagy PhD (2016)  PSDS
Konrád János Deák PhD (2015)  PSDS
Zsuzsanna Ambrózy PhD (2015)  PSDS
Péter Szuvandzsiev PhD (2014)  PSDS
  Thesis topic proposals
Research
research area Effect of biotic and abiotic factors on nutritional values of vegetable crops (tomato, sweet pepper, onion, eggplant, carrot broccoli, etc.) particularly on antioxidants (lycopene,etc) content
research field in which current research is conducted plant breeding and botany
Publications
2013

Pék Z, Daood H, Gasztonyi Nagyné M, Neményi A, Helyes L: Effect of environmental conditions and water status on the bioactive compounds of broccoli., CENTRAL EUROPEAN JOURNAL OF BIOLOGY 8: (8) pp. 777-787.
type of document: Journal paper/Article
impact factor: 0.818*
number of independent citations: 1
language: English
2012

Helyes L, Lugasi A, Pék Z: Effect of irrigation on processing tomato yield and antioxidant components., TURKISH JOURNAL OF AGRICULTURE AND FORESTRY 36: (6) pp. 702-709. Paper doi:10.3906/tar-1107-9 IF: 0.703.
type of document: Journal paper/Article
impact factor: 0.731
number of independent citations: 1
language: English
Full text of document 
2011

Pék Z, Szuvandzsiev P, Neményi A, Helyes L, Lugasi A: The Effect of natural light on changes in antioxidant content and color parameters of vine-ripened omato (Solanum lycopersicum L.) fruits., HORTSCIENCE 46: (4) pp. 583-585.
type of document: Journal paper/Article
impact factor: 0.778
number of independent citations: 5
language: English
Full text of document 
2010

Pék Z, Helyes L, Lugasi A: Color changes and antioxidant content of vine and post-harvest ripened tomato fruits., HORTSCIENCE 45: (3) pp. 466-468.
type of document: Journal paper/Article
impact factor: 0.886
number of independent citations: 8
language: English
Full text of document 
2009

Helyes L, Lugasi A, Pogonyi Á, Pék Z: Effect of variety and grafting on lycopene content of tomato ( Lycopersicon lycopersicum L. Karsten) fruit, ACTA ALIMENTARIA 38: (1) pp. 27-34.
type of document: Journal paper/Article
impact factor: 0.505
number of independent citations: 10
language: English
Full text of document 
2006

Brandt S, Pék Z, Barna É, Lugasi A, Helyes L: Effect of maturity stage on content, color and quality of tomato (Lycopersicon lycopersicum (L.) Karsten) fruit., JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 86: (4) pp. 568-572.
type of document: Journal paper/Article
impact factor: 1.026
number of independent citations: 84
language: English
2006

Helyes L, Lugasi A: Formation of certain compounds having technological and nutritional importance in tomato fruits during maturation., ACTA ALIMENTARIA 35: (2) pp. 183-193.
type of document: Journal paper/Article
impact factor: 0.253
number of independent citations: 21
language: English
2006

Helyes L, Lugasi A, Pék Z: Tomato fruit quality and content depend on stage of maturity., HORTSCIENCE 41: (6) pp. 1400-1401.
type of document: Journal paper/Article
impact factor: 0.613
number of independent citations: 24
language: English
2004

Pék Z, Helyes L: The effect of daily temperature on truss flowering rate of tomato., JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 84: (13) pp. 1671-1674.
type of document: Journal paper/Article
impact factor: 0.871
number of independent citations: 12
language: English
2003

Brandt S, Lugasi A, Barna É, Hóvári J, Pék Z, Helyes L: Effects of the growing methods and conditions on the lycopene content of tomato fruits., ACTA ALIMENTARIA 32: (3) pp. 269-278.
type of document: Journal paper/Article
impact factor: 0.299
number of independent citations: 22
language: English
Cumulative impact factor of the 10 most significant publications:5.962 
Number of independent citations to these publications:188 
Scientometric data
list of publications and citations
number of scientific publications that meet accreditation criteria:
113
number of scientific publications:
182
monographs and professional books:
1
no. of monographs/books in which chapters/sections were contributed:
14 
cumulative impact factor:
13.462
number of independent citations to scientific publications:
448
further relevant information regarding accreditation (in Hungarian)
2004-ben sikeresen habilitáltam, 2008-tól az MTA doktora. Tudományos tevékenységem során összesen 233 közleményem jelent meg, amelyből 144 tudományos közlemény, ebből több mint 100 angol nyelvű. Összes hivatkozásaim száma:495, Összes IF: 13,462 Hirsch-index 11 (to be translated)

 
All rights reserved © 2007, Hungarian Doctoral Council. Doctoral Council registration number at commissioner for data protection: 02003/0001. Program version: 1.1255 ( 2013. XII. 17. )