User profiles for P. Rigas

Petros Pavlos Rigas

Project Victor Co., Ltd., Loxley Public Company Limited, Assumption University, APIU …
Verified email at projectvictor.com
Cited by 45

Soil enzyme activities as biological indicators of soil health

I Alkorta, A Aizpurua, P Riga, I Albizu… - Reviews on …, 2003 - degruyter.com
… Nannipieri P, Kandeler Ε, Ruggiero P. Enzyme activities and microbiological and
biochemical processes in soil. In: Burns RG, Dick RP, eds, Enzymes in the Environment. …

Thalamocortical Up states: differential effects of intrinsic and extrinsic cortical inputs on persistent activity

P Rigas, MA Castro-Alamancos - Journal of Neuroscience, 2007 - Soc Neuroscience
During behavioral quiescence, the neocortex generates spontaneous slow oscillations that
consist of Up and Down states. Up states are short epochs of persistent activity that resemble …

Post-column labeling techniques in amino acid analysis by liquid chromatography

PG Rigas - Analytical and bioanalytical chemistry, 2013 - Springer
Amino acid analysis (AAA) has always presented an analytical challenge in terms of sample
preparation, separation, and detection. Because of the vast number of amino acids, various …

Comparison of hydroponic and aeroponic cultivation systems for the production of potato minitubers

E Ritter, B Angulo, P Riga, C Herran, J Relloso… - Potato Research, 2001 - Springer
Two different cultivation systems, aeroponics and hydroponics in greenhouse beds, were
compared for the production of potato minitubers. Plants in the aeroponic system showed …

liquid chromatography—post-column derivatization for amino acid analysis: strategies, instrumentation, and applications

PG Rigas - Instrumentation Science & Technology, 2012 - Taylor & Francis
… (Reproduced from RIGAS LABS SA with permission.) (color figure available online.). …
Rigas , GP NBD-Cl as a new post-column reagent for HPLC analysis of primary and secondary …

Development and validation of a rapid HPLC method for the determination of five banned fat-soluble colorants in spices using a narrow-bore monolithic column

CK Zacharis, FS Kika, PD Tzanavaras, P Rigas… - Talanta, 2011 - Elsevier
This work reports a fast and simple liquid chromatographic method for the simultaneous
determination of five banned fat-soluble synthetic colorants, namely Sudan I–IV and Para-Red, …

Melatonin content of pepper and tomato fruits: effects of cultivar and solar radiation

P Riga, S Medina, LA García-Flores, Á Gil-Izquierdo - Food chemistry, 2014 - Elsevier
We evaluated the effect of cultivar and solar radiation on the melatonin content of Capsicum
annuum (pepper) and Solanum lycopersicum (tomato) fruits. The melatonin content of red …

Determination of boron in water and pharmaceuticals by sequential-injection analysis and fluorimetric detection

…, DG Themelis, H Bikou, PD Tzanavaras, PG Rigas - Analytica chimica …, 2004 - Elsevier
This work reports the application of a sequential-injection analysis (SIA) method for the
determination of boron. The method relies on the enhancement of the fluorescence (λ ex =313nm…

Resonance (∼ 10 Hz) of excitatory networks in motor cortex: effects of voltage‐dependent ion channel blockers

MA Castro‐Alamancos, P Rigas… - The Journal of …, 2007 - Wiley Online Library
The motor cortex generates synchronous network oscillations at frequencies between 7 and
14 Hz during disinhibition or low [Mg 2+ ] o buffers, but the underlying mechanisms are …

Impact of persistent cortical activity (up states) on intracortical and thalamocortical synaptic inputs

P Rigas, MA Castro-Alamancos - Journal of …, 2009 - journals.physiology.org
… states was significantly lower than during down states (P < 0.01; 12 of 13 cells). In the
remaining cell, there was no significant difference between the two states (P > 0.2; 1 of 13 cells). …