publicaciones seleccionadas artículo académico JOURNAL OF RAMAN SPECTROSCOPY. JOURNAL OF RAMAN SPECTROSCOPY. 51(4):649-659. 2020 CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS. CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS. 195. 2019 APPLIED CATALYSIS B-ENVIRONMENTAL. APPLIED CATALYSIS B-ENVIRONMENTAL. 206:252-262. 2017 APPLIED SPECTROSCOPY. APPLIED SPECTROSCOPY. 71(10):2263-2277. 2017 BIOENERGY RESEARCH. BIOENERGY RESEARCH. 10(3):714-727. 2017 CHEMICAL AND MICROSTRUCTURAL CHANGES IN EUCALYPTUS GLOBULUS FIBERS SUBJECTED TO FOUR DIFFERENT PRETREATMENTS AND THEIR INFLUENCE ON THE ENZYMATIC HYDROLYSIS. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 62(2):3442-3446. 2017 MICROCHEMICAL JOURNAL. MICROCHEMICAL JOURNAL. 134:164-172. 2017 CHARACTERIZATION OF TEMPORAL BIODEGRADATION OF RADIATA PINE BY GLOEOPHYLLUM TRABEUM THROUGH PRINCIPAL COMPONENT ANALYSIS-BASED TWO-DIMENSIONAL CORRELATION FTIR SPECTROSCOPY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 61(2):2878-2883. 2016 FIBER MODIFICATION BY ORGANOSOLV CATALYZED WITH H2SO4 IMPROVES THE SSF OF PINUS RADIATA. INDUSTRIAL CROPS AND PRODUCTS. 86:79-86. 2016 INORGANICA CHIMICA ACTA. INORGANICA CHIMICA ACTA. 453:1-7. 2016 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 61(3):3152-3156. 2016 ANALYTICA CHIMICA ACTA. ANALYTICA CHIMICA ACTA. 866:10-20. 2015 BIOTECHNOLOGY AND BIOENGINEERING. BIOTECHNOLOGY AND BIOENGINEERING. 112:1783-1791. 2015 ENHANCED ETHANOL PRODUCTION BY SIMULTANEOUS SACCHARIFICATION AND FERMENTATION OF PRETREATED OLIVE STONES. RENEWABLE ENERGY. 74:839-847. 2015 FOURIER TRANSFORMED NEAR INFRARED (FT-NIR) SPECTROSCOPY FOR THE ESTIMATION OF PARAMETERS IN PRETREATED LIGNOCELLULOSIC MATERIALS FOR BIOETHANOL PRODUCTION. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 90(7):1281-1289. 2015 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 60:2954-2960. 2015 REACTIVITY OF CATECHOLAMINE-DRIVEN FENTON REACTION AND ITS RELATIONSHIP WITH IRON (III) SPECIATION. REDOX REPORT. 20(2):89-96. 2015 BETA-GLUCOSIDASE IMMOBILISATION ON SYNTHETIC SUPERPARAMAGNETIC MAGNETITE NANOPARTICLES AND THEIR APPLICATION IN SACCHARIFICATION OF WHEAT STRAW AND EUCALYPTUS GLOBULUS PULPS. JOURNAL OF EXPERIMENTAL NANOSCIENCE. 9(2):177-185. 2014 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 59(1):2347-2352. 2014 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 59(3):2632-2635. 2014 FUEL ETHANOL PRODUCTION FROM EUCALYPTUS GLOBULUS WOOD BY AUTOCATALIZED ORGANOSOLV PRETREATMENT ETHANOL-WATER AND SSF. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 88(1):39-48. 2013 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 52(16):5713-5720. 2013 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 52(16):5713-5720. 2013 ACTA SCIENTIARUM-TECHNOLOGY. ACTA SCIENTIARUM-TECHNOLOGY. 34(3):277-281. 2012 ALKALINE SULFITE/ANTHRAQUINONE PRETREATMENT FOLLOWED BY DISK REFINING OF PINUS RADIATA AND PINUS CARIBAEA WOOD CHIPS FOR BIOCHEMICAL ETHANOL PRODUCTION. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 87(5):651-657. 2012 APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. 168:2028-2042. 2012 B-GLUCOSIDASE IMMOBILISATION ON SYNTHETIC SUPERPARAMAGNETIC MAGNETITE NANOPARTICLES AND THEIR APPLICATION IN SACCHARIFICATION OF WHEAT STRAW AND EUCALYPTUS GLOBULUS PULPS. JOURNAL OF EXPERIMENTAL NANOSCIENCE. 2012:1-7. 2012 BIODEGRADATION OF EUCALYPTUS GLOBULUS AND E. NITENS BY THE WHITE-ROT FUNGUS CERIPORIOPSIS SUBVERMISPORA DND LIGNIN CHARACTERIZATION BY THIOACIDOLYSIS AND CUO OXIDATION. WOOD RESEARCH. 57(1):91-100. 2012 EFFECT OF ORGANOSOLV PROCESS ON STRUCTURAL CHARACTERISTICS AND ENZYMATIC DIGESTIBILITY IN PINUS RADIATA WOOD. MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS. B2(2):112-125. 2012 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 58(2):827-831. 2012 A MINIREVIEW OF CELLULOSE NANOCRYSTALS AND ITS POTENTIAL INTEGRATION AS CO-PRODUCT IN BIOETHANOL PRODUCTION. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 53(2):672-677. 2011 BIOETHANOL PRODUCTION FROM TENSION AND OPPOSITE WOOD OF EUCALYPTUS GLOBULUS USING ORGANOSOLV PRETREATMENT AND SIMULTANEOUS SACCHARIFICATION AND FERMENTATION. JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY. 38(11):1861-1866. 2011 DILUTED ACID PRETREATMENT OF PINUS RADIATA FOR BIOETHANOL PRODUCTION USING INMOBILIZED SACCHAROMYCES CEREVISIAE IR2-9 IN A SIMULTANEOUS SACCHARIFICATION AND FERMENTATION PROCESS. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 56(4):901-906. 2011 ENZYME AND MICROBIAL TECHNOLOGY. ENZYME AND MICROBIAL TECHNOLOGY. 49:472-477. 2011 NEW INSIGHTS IN THE DIHYDROXYBENZENES-DRIVEN FENTON REACTION: ELECTROCHEMICAL STUDY OF INTERACTION BETWEEN DIHYDROXYBENZENES AND FE(III). WATER SCIENCE AND TECHNOLOGY. 64:2103-2108. 2011 BIOORGANOSOLV PRETREATMENT OF P. RADIATA BY A BROWN ROT FUNGUS (GLOEPHYLLUM TRABEUM) AND ETHANOLYSIS. ENZYME AND MICROBIAL TECHNOLOGY. 47:11-16. 2010 CLASSIFICATION OF GENOTYPES OF EUCALYPTUS GLOBULUS UNDER COLD CONDITIONS USING THEIR FREE AMINO CONTENT ON LEAVES AND REGULARIZED DISCRIMINANT ANALYSIS (RDA). JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 55(1):11-18. 2010 DETERMINATION OF DIFFERENCES IN ANATOMICAL AND CHEMICAL CHARACTERISTICS OF TENSION AND OPPOSITE WOOD OF 8-YEAR OLD EUCALYPTUS GLOBULUS. MADERAS-CIENCIA Y TECNOLOGIA. 12(3):241-251. 2010 DETERMINATION OF OPTIMAL PRE-TREATMENT CONDITIONS FOR ETHANOL PRODUCTION FROM OLIVE-PRUNING DEBRIS BY SIMULTANEOUS SACCHARIFICATION AND FERMENTATION. FUEL. 89:2891-2896. 2010 EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY GLOEOPHYLLUM TRABEUM. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 55(4):283-286. 2010 ENZYME AND MICROBIAL TECHNOLOGY. ENZYME AND MICROBIAL TECHNOLOGY. 46:262-267. 2010 EVALUATION OF A COMBINED BROWN ROT DECAY-CHEMICAL DELIGNIFICATION PROCESS AS A PRETREATMENT FOR BIOETHANOL PRODUCTION FROM PINUS RADIATA WOOD CHIPS. JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY. 37:893-900. 2010 INFLUENCE OF STIRRING VELOCITY ON THE SYNTHESIS OF MAGNETITE NANOPARTICLES (FE3O4) BY THE CO-PRECIPITATION METHOD. JOURNAL OF ALLOYS AND COMPOUNDS. 488:227-231. 2010 COMPARISON BETWEEN UV SPECTROPHOTOMETRY AND ANION EXCHANGE CHROMATOGRAPHY TECHNIQUES FOR QUANTIFICATION OF HEXENURONIC ACID (HEXA) IN UNBLEACHED KRAFT PULPS OF EUCALYPTUS GLOBULUS. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 54(3):238-243. 2009 ESTIMATING GLUCAN, XYLAN, AND METHYLGLUCURONIC ACIDS IN KRAFT PULPS OF EUCALYPTUS GLOBULUS USING FT-NIR SPECTROSCOPY AND MULTIVARIATE ANALYSIS. JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY. 29:150-163. 2009 FOLIAR DAMAGE ASSESSMENT AND SELECTION OF COLD RESISTANT GENOTYPES USING NEAR INFRARED SPECTRA OF EUCALYPTUS GLOBULUS LEAVES. JOURNAL OF NEAR INFRARED SPECTROSCOPY. 17:223-231. 2009 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 54(2):141-143. 2009 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 54(2):113-118. 2009 ALLELOCHEMICALS AND NATURAL DURABILITY IN CHILEAN CUPRESSACEAE HEARTWOODS. ALLELOPATHY JOURNAL. 21(1):119-132. 2008 APPITA JOURNAL. APPITA JOURNAL. 61(3):212-215. 2008 COPPER CATECHOL-DRIVEN FENTON REACTIONS AND THEIR POTENTIAL ROLE IN WOOD DEGRADATION. INTERNATIONAL BIODETERIORATION & BIODEGRADATION. 61(4):345-350. 2008 DETERMINATION OF ARYLGLYCEROL-BETA-ARYL ETHER LINKAGES IN ENZYMATIC MILD ACIDOLYSIS LIGNINS (EMAL): COMPARISON OF DFRC/31P NMR WITH THIOACIDOLYSIS. JOURNAL OF NATURAL PRODUCTS. 71:836-841. 2008 ENZYME AND MICROBIAL TECHNOLOGY. ENZYME AND MICROBIAL TECHNOLOGY. 43:214-219. 2008 ENZYME AND MICROBIAL TECHNOLOGY. ENZYME AND MICROBIAL TECHNOLOGY. 43:120-123. 2008 ESTIMATION OF HEXENURONIC ACIDS AND KAPPA NUMBER IN KRAFT PULPS OF EUCALYPTUS GLOBULUS BY FOURIER TRANSFORM NEAR INFRARED SPECTROSCOPY AND MULTIVARIATE ANALYSIS. JOURNAL OF NEAR INFRARED SPECTROSCOPY. 16(2):121-128. 2008 EVALUATION OF THE WHITE-ROT FUNGI GANODERMA AUSTRALE AND CERIPORIOPSIS SUBVERMISPORA IN BIOTECHNOLOGICAL APPLICATIONS. JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY. 35(11):1323-1330. 2008 EVIDENCE FOR HOLE PARTICIPATION DURING THE PHOTOCATALYTIC OXIDATION OF THE ANTIBIOTIC FLUMEQUINE. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. 193:139-145. 2008 FIREBOARD MANUFACTURED WITHOUT RESIN USING THE FENTON REACTION. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 53(4):1722-1725. 2008 FUNGAL DIVERSITY. FUNGAL DIVERSITY. 33:77-86. 2008 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 47:8542-8549. 2008 JOURNAL OF CHEMOMETRICS. JOURNAL OF CHEMOMETRICS. 22:268-280. 2008 JOURNAL OF HAZARDOUS MATERIALS. JOURNAL OF HAZARDOUS MATERIALS. 155:45-50. 2008 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 53(4):1709-1713. 2008 AN EVALUATION OF BRITISH COLUMBIAN BEETLE-KILLED HYBRID SPRUCE FOR BIOETHANOL PRODUCTION. APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. 136-140:267-280. 2007 APPLIED CATALYSIS B-ENVIRONMENTAL. APPLIED CATALYSIS B-ENVIRONMENTAL. 76:57-63. 2007 BIOETHANOL PRODUCTION FROM BIO-ORGANOSOLV PULPS OF PINUS RADIATA AND ACACIA DEALBATA. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 82(8):767-774. 2007 BIOREMEDIATION JOURNAL 2007 COUPLING OF PHOTOCATALYTIC AND BIOLOGICAL REACTORS TO REMOVE EDTA-FE FROM AQUEOUS SOLUTION. ENVIRONMENTAL TECHNOLOGY. 28:123-127. 2007 DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 52(1):1069-1072. 2007 ENHANCED HYDROXYL RADICAL PRODUCTION BY DIHYDROXYBENZENES-DRIVEN FENTON REACTIONS: IMPLICATIONS FOR WOOD BIODEGRADATION. JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY. 12(7):1055-1061. 2007 ENZYMES PRODUCED BY GANODERMA AUSTRALE GROWING ON WOOD AND IN SUBMERGED CULTURES. WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY. 23:429-434. 2007 USING A SECOND-ORDER POLYNOMIAL MODEL TO DETERMINE THE OPTIMUM DREGS/BARK RATIO FOR INDUSTRIAL-BIOSOLID COMPOSTING: THE INITIAL CONDITIONING STAGE. WASTE MANAGEMENT & RESEARCH. 25:319-326. 2007 USING SECOND-ORDER POLYNOMIAL MODEL TO DETERMINE THE OPTIMUM DREGS/BARK RATIO FOR INDUSTRIAL-BIOSOLID COMPOSTING: INITIAL CONDITIONING STAGE. WASTE MANAGEMENT & RESEARCH. 25(4):319-326. 2007 DEGRADATION AND INACTIVATION OF TETRACYCLINE BY TIO2 PHOTOCATALYSIS. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. 184:141-146. 2006 DEGRADATION OF TRIBROMOPHENOL BY WOOD-ROT FUNGI AND HAMILTON SYSTEM. ELECTRONIC JOURNAL OF BIOTECHNOLOGY. 9(3):253-257. 2006 EVALUATION OF FUNGAL ENDOPHYTES FOR LIGNOCELLULOLYTIC ENZYME PRODUCTION AND WOOD BIODEGRADATION. INTERNATIONAL BIODETERIORATION & BIODEGRADATION. 57:129-135. 2006 FEMS MICROBIOLOGY LETTERS. FEMS MICROBIOLOGY LETTERS. 260(1):112-118. 2006 INFLUENCE OF FOREST SOIL ON BIODEGRADATION OF DRIMYS WINTERI BY GANODERMA AUSTRALE. INTERNATIONAL BIODETERIORATION & BIODEGRADATION. 57:174-178. 2006 INTERNATIONAL BIODETERIORATION & BIODEGRADATION. INTERNATIONAL BIODETERIORATION & BIODEGRADATION. 57:63-68. 2006 JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 81:1282-1287. 2006 JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 81(2):196-200. 2006 JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. 81:608-613. 2006 JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. 181:188-194. 2006 O PAPEL 2006 BIORESOURCE TECHNOLOGY. BIORESOURCE TECHNOLOGY. 96:95-101. 2005 ESTIMATING DENSITY AND PULPING YIELD OF E. GLOBULUS WOOD: COMPARISON OF NEAR-INFRARED (NIR) AND MID-INFRARED (MIR). JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 50(3):447-450. 2005 APPLIED CATALYSIS B-ENVIRONMENTAL. APPLIED CATALYSIS B-ENVIRONMENTAL. 48:205-211. 2004 DEGRADATION OF RECALCITRANT COMPOUNDS BY CATECHOL-DRIVEN FENTON REACTION. WATER SCIENCE AND TECHNOLOGY. 49(4):81-84. 2004 EFFECT OF TREE AGE ON VARIATION OF PINUS RADIATA D. DON CHEMICAL COMPOSITION. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 49(3):251-256. 2004 ENVIRONMENTAL TECHNOLOGY. ENVIRONMENTAL TECHNOLOGY. 25:801-807. 2004 ENZYME AND MICROBIAL TECHNOLOGY. ENZYME AND MICROBIAL TECHNOLOGY. 34:228-234. 2004 JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY. JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY. 24(2):99-113. 2004 RELACIÓN ENTRE EDAD DEL ARBOL Y SU COMPOSICIÓN QUÍMICA EN PINUS RADIATA (D. DON) CRECIDO EN CHILE Y SU IMPORTANCIA PARA LA PRODUCCIÓN DE BIOETANOL. REVISTA FORESTAL MESOAMERICA KURU-RFMK. 1(1):1-8. 2004 A SCREENING METHOD FOR DETECTING IRON REDUCING WOOD-ROT FUNGI. BIOTECHNOLOGY LETTERS. 25:891-893. 2003 DEGRADATION OF FE(III)-ETHYLENEDIAMINETETRAACETIC ACID (EDTA) COMPLEX BY A CATECHOL-DRIVEN FENTON REACTION. FRESENIUS ENVIRONMENTAL BULLETIN. 12(11:1323-1327. 2003 ESTIMATING THE DENSITY AND PULPING YIELD OF E. GLOBULUS WOOD BY DRIFT-MIR SPECTROSCOPY AND PRINCIPAL COMPONENTS REGRESSION (PCR). JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 48(3):19-22. 2003 JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. JOURNAL OF THE CHILEAN CHEMICAL SOCIETY. 48:29-33. 2003 REMOVAL OF METAL IONS BY MODIFIED PINUS RADIATA BARK AND TANNINS FROM WATER SOLUTIONS. WATER RESEARCH. 37(20:4974-4980. 2003 BOLETÍN DE LA SOCIEDAD CHILENA DE QUÍMICA. BOLETÍN DE LA SOCIEDAD CHILENA DE QUÍMICA. 47:469-476. 2002 CATALYSIS TODAY. CATALYSIS TODAY. 76:235-246. 2002 FACTORIAL EXPERIMENTAL DESIGN OF ORANGE II PHOTOCATALYTIC DISCOLOURATION. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. 6065:1-7. 2002 APPLIED CATALYSIS B-ENVIRONMENTAL. APPLIED CATALYSIS B-ENVIRONMENTAL. 33:89-96. 2001 BOLETÍN DE LA SOCIEDAD CHILENA DE QUÍMICA. BOLETÍN DE LA SOCIEDAD CHILENA DE QUÍMICA. 46:41-49. 2001 BOLETÍN DE LA SOCIEDAD CHILENA DE QUÍMICA. BOLETÍN DE LA SOCIEDAD CHILENA DE QUÍMICA. 46:179-185. 2001 DIHYDROBENZENES: DRIVEN FENTON REACTIONS. WATER SCIENCE AND TECHNOLOGY. 44(5):251-256. 2001 INTERNATIONAL BIODETERIORATION & BIODEGRADATION. INTERNATIONAL BIODETERIORATION & BIODEGRADATION. 47:203-208. 2001 REACTIVE DYES DECOLOURATION BY TIO2 PHOTO-ASSISTD CATALYSIS. WATER SCIENCE AND TECHNOLOGY. 44(5):197-203. 2001 CHLOROPHENOL TOLERANT AND DEGRADATIVE BACTERIA ISOLATED FROM A RIVER RECEIVING PULP MILL DISCHARGES 2000 MEASUREMENT SCIENCE AND TECHNOLOGY. MEASUREMENT SCIENCE AND TECHNOLOGY. 11:504-508. 2000 SYNTHESIS OF E-9-DODECEN-1-YL ACETATE USING ORGANOMANGANESE REAGENTS. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES. 55b:583-586. 2000