TÉCNICAS DE GEOPROCESSAMENTO NA CARACTERIZAÇÃO DE APPS NUMA MICROBACIA, EM FUNÇÃO DA LEGISLAÇÃO AMBIENTAL

2017 ◽  
Vol 32 (2) ◽  
pp. 184
Author(s):  
Sergio Campos ◽  
Gabriel Rondina Pupo da Silveira ◽  
Yara Manfrin Garcia ◽  
Mariana De Campos ◽  
Marcelo Campos
Keyword(s):  
Land Use ◽  
Supervised Classification ◽  
Satellite Image ◽  
Geographical Information ◽  
Environmental Legislation ◽  
Environmental Preservation ◽  
Recovery Planning ◽  
Short Time

Esse trabalho objetivou a utilização de técnicas de geoprocessamento na discriminação de classes de uso e ocupação do solo em áreas de APP, permitindo a constatação de futuras intervenções antrópicas que auxiliarão em fiscalizações ambientais. A microbacia com 183,19ha, situa-se entre as coordenadas geográficas 22o 44’ 41” a 22o  45’ 41” de latitude S e 48o 24’ 13” a 48o 25’ 01” de longitude WGr.  A base cartográfica utilizadas foi a carta topográfica de Botucatu para o georreferenciamento da imagem de satélite de 2008. O SIG-IDRISI Selva foi utilizado na classificação supervisionada e a determinação dos mapas temáticos. O uso da terra mostrou que a pastagem ocupa a maior parte da área (85,61%), mostrando com isso a predominância da pecuária regional. A imagem de satélite e a utilização do SIG mostraram-se importantes ferramentas, fornecendo resultados confiáveis num pequeno intervalo de tempo. Os dados obtidos auxiliarão nos futuros planejamentos de recuperação da microbacia, possibilitando verificar que a área não vem sendo ambientalmente preservada, pois a mesma apresenta somente 14,38% de vegetação e água, sendo que o mínimo exigido pela legislação do Código Florestal Brasileiro vigente é de 20%.PALAVRAS-CHAVE: Legislação ambiental, sistema de informação geográfica, preservação ambiental. GEOPROCESSING TECHNIQUES IN THE CHARACTERIZATION OF APPS IN MICROBABY, IN THE FUNCTION OF ENVIRONMENTAL LEGISLATIONABSTRACT: This work aimed at the use of geoprocessing techniques in the discrimination of classes of land use and occupation in areas of PPA, allowing the confirmation of future anthropogenic interventions that will aid in environmental inspections. The microbasin with 183.19 ha lies between the geographic coordinates 22o 44' 41"at 22o 45' 41" latitude S and 48o 24' 13"at 48o 25' 01" WGr longitude. The cartographic base used was the Botucatu topographic chart for the georeferencing of the satellite image of 2008. The SIG-IDRISI Selva was used in the supervised classification and the determination of thematic maps. Land use showed that pasture occupies most of the area (85.61%), thus showing the predominance of regional livestock. Satellite imagery and the use of GIS have proved to be important tools, providing reliable results in a short time. The data obtained will aid in the future recovery planning of the microbasin, making it possible to verify that the area is not environmentally preserved, since it presents only 14.38% of vegetation and water, and the minimum required by the Brazilian Forestry Code is of 20%.KEYWORDS: Environmental legislation, geographical information system, environmental preservation. 

scholarly journals GEOMÁTICA APLICADA NA ANÁLISE DO CONFLITO DE USO DO SOLO EM ÁREAS DE PRESERVAÇÃO PERMANENTE

2019 ◽  
Vol 34 (4) ◽  
pp. 544-551
Author(s):  
Gabriel Rondina Pupo da Silveira ◽  
Sérgio Campos ◽  
Aline Kuramoto Gonçalves ◽  
Fernanda Leite Ribeiro ◽  
Yara Manfrin Garcia
Keyword(s):  
Land Use ◽  
Information System ◽  
Geographic Information System ◽  
Satellite Image ◽  
Drainage Network ◽  
Environmental Legislation ◽  
Environmental Preservation ◽  
Thematic Map ◽  
E Mail ◽  
Area Planning

GEOMÁTICA APLICADA NA ANÁLISE DO CONFLITO DE USO DO SOLO EM ÁREAS DE PRESERVAÇÃO PERMANENTE   GABRIEL RONDINA PUPO DA SILVEIRA 1, SÉRGIO CAMPOS 1, ALINE KURAMOTO GONÇALVES 1, FERNANDA LEITE RIBEIRO2, YARA MANFRIN GARCIA1   1Departamento Engenharia Rural, FCA/UNESP/Botucatu, Fazenda Experimental Lageado, Av. Universitária, nº 3780 - Altos do Paraíso, Botucatu - SP, 18610-03, e-mails: [email protected], [email protected], [email protected], [email protected].  2 Departamento de Geociências, U niversidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid - Pr 445 Km 380 Cx. Postal 10.011 - Campus Universitário, PR, 86057-970, e-mail: [email protected].   RESUMO: O trabalho visou obter o uso do solo da bacia do rio Araquazinho – São Manuel (SP) utilizando imagem de satélite e técnicas geomáticas na determinação das Áreas de Preservação Permanentes (APPs) e conflitos existentes na área. As bases cartográficas foram cartas planialtimétricas em formato digital georreferenciadas. O SIG-IDRISI Selva foi utilizado para realizar o georreferenciamento da imagem, geração dos buffers de APPs e o overlay para obtenção dos conflitos de uso além da confecção do mapa temático final. No software CartaLinx realizou-se a delimitação da área de estudo e delimitação dos elementos (limite, rede de drenagem e das áreas de uso e cobertura). O uso do solo da bacia mostrou que o uso da cana-de-açúcar foi a classe que ocupou 86,82 % (5815,63 ha) da área. As áreas de conflito mostraram que a maior parte das APPs, equivalente a 109,70 ha, estão sendo usadas para outros fins. As Áreas de Preservação Permanente e seus conflitos mostraram que uma boa parte da área da bacia em estudo precisa de cuidados com relação a legislação ambiental. Desta forma, o mapa temático permitiu o mapeamento da área gerando dados que auxiliarão nos futuros planejamentos de recuperação da área.   Palavras-chaves: Sistema de Informação Geográfica, Geoprocessamento, Preservação Ambiental   GEOMATICS APPLIED IN CONFLICT ANALYSIS OF LAND USE IN PERMANENT PRESERVATION AREAS   ABSTRACT: This study aim obtaining the land use of Araquazinho River watershed, São Manuel, SP, using satellite image and geomatic techniques to determine the Permanent Preservation Areas (PPAs) and area conflicts. The cartographic bases were digital georeferenced planialtimetrics cards. The SIG-IDRISI Selva was used to image georeferencing, generation of PPAs buffers, in the overlay to obtain the conflicts use and to generate the final thematic map. In CartaLinx was done the delimitation of study area and elements (limit, drainage network and areas of use and coverage). Soil use showed that sugarcane use was the class that occupied 86.82% (5815.63 ha) area. The conflict areas showed that most of the PPA, equivalent of 109.70 ha, is being used for other purposes. Permanent Preservation Areas and their conflicts have shown that a big part of watershed needs to be taken care in relation to environmental legislation. So, the thematic map can allow mapping the area generating data that can assist in future recovery area planning.   Keywords: Geographic Information System, Geoprocessing, Environmental preservation.

The versatility of the Bristow absorption tester – a review

2018 ◽  
Vol 33 (2) ◽  
pp. 279-296 ◽  
Author(s):  
Sami-Seppo Ovaska ◽  
Kaj Backfolk
Keyword(s):  
Special Focus ◽  
Print Quality ◽  
Substrate Roughness ◽  
Time Intervals ◽  
Absorption Properties ◽  
Liquid Absorption ◽  
Short Time ◽  
Printing Processes

Abstract This paper reviews the use of the Bristow Absorption Tester (known also as the Bristow wheel) in the characterization of fiber-based substrates. The Bristow wheel is a laboratory-scale instrument that has been designed for studying substrate wettability and dynamic liquid absorption properties in short time intervals, which are important in many converting and printing processes of paper and paperboard. The tester also gives information about substrate roughness. The Bristow wheel has shown great usefulness in predicting print quality especially in inkjet applications, in which a good correlation between print quality (letter area) and ink penetration rate has been found by several researchers. The apparatus is particularly useful in dynamic wetting studies, but it has also been successfully used in numerous other research purposes such as the determination of the degree of sizing, evaluation of material glueability, and various coatability studies. Modifications of both the testing principle and the tester structure have also been reported. These include e. g. equipping the apparatus with a corona unit that makes it possible to mimic a printing process on a relevant time-scale. This review summarizes the reported applications of Bristow wheel with a special focus on tester performance and versatility.

scholarly journals DETERMINAÇÃO DA CAPACIDADE DE USO DAS TERRAS DO MUNICÍPIO DE SÃO MANUEL - SP

Irriga ◽  
2003 ◽  
Vol 8 (2) ◽  
pp. 142-149
Author(s):  
Osmar Delmanto Júnior ◽  
Sergio Campos ◽  
Lincoln Gehring Cardoso ◽  
Zacarias Xavier de Barros
Keyword(s):  
Land Use ◽  
Information System ◽  
Geographical Information System ◽  
Geographical Information Systems ◽  
Geographical Information ◽  
Digital Storage ◽  
Territorial Organization ◽  
E Mail ◽  
Excellent Tool

DETERMINAÇÃO DA CAPACIDADE DE USO DAS TERRAS DO MUNICÍPIO DE SÃO MANUEL - SP   Osmar Delmanto JuniorSérgio CamposLincoln Gehring CardosoZacarias Xavier  de BarrosDepartamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu, SP. CP 237, CEP 18603-970. E-mail: [email protected]  1 RESUMO  Esse trabalho objetivou a elaboração da carta de capacidade de uso das terras do Município de São Manuel - SP, visando o planejamento adequado da ocupação do solo, utilizado-se de Sistema de Informação Geográfica (SIG).  A bacia situa-se entre as coordenadas geográficas  22º 28’ 20” e 22º 53’ 10” de latitudes S e os meridianos 48º 21’ 52” e 48º 48’ 00” de longitudes W Gr., apresentando uma área de 60.988ha.   O mapa de capacidade de uso da terra do município foi elaborado a partir dos mapas de classes de declive e de solo, tomando-se por base as características de cada um e utilizando-se da tabela de julgamento de classes de capacidade de uso.  As áreas da classe e subclasses de capacidade de uso das terras determinadas pelo SIG –IDRISI foram:  IIe,s (22,64%); IIIe (8,62%); IIIe,s (15,83%); IIIs (29,97%); IVe (10,82%); VIe (3,95%) e VIIe (0,96%).  Os resultados permitiram inferir que as subclasses mais significativas foram a IIIs e IIe,s.  As classes de declive de 0 a 20% ocorrem em mais de ¾ do Município, sendo as áreas planas, as mais representativas, pois ocorrem em quase 1/3 da área total.  O SIG mostrou-se uma excelente ferramenta para determinação da capacidade de uso da terra, demonstrando que a utilização do geoprocessamento facilita e agiliza o cruzamento dos dados digitais, permitindo seu armazenamento, que poderão ser utilizados para outras análises em futuros planejamentos geoambientais.  UNITERMOS: Sistema de Informações Geográficas, unidades de solo, classes  de declive, capacidade de uso da terra   DELMANTO JUNIOR, O.; CAMPOS S.; CARDOSO, L.G.; BARROS, Z.X. LAND USE CAPABILITY DETERMINATION OF SÃO MANUEL MUNICIPALITY-SP   2 ABSTRACT  The present work purposed a land use capability chart development from São Manuel Municipality-SP using a Geographical Information System - Idrisi aiming to contribute for a better territorial organization and soil occupation planning. The basin is located in the 22º 28’ 20” geographical co-ordinates at 22º 53’ 10” S latitude, 48º 21’ 52” and 48º 48’ 00” meridian of W Gr. longitude, presenting an area of 9180,12ha.  The chart of the basin land use capability was elaborated from the soil and sloping class charts based on each one characteristics and using the class table of use capability. The class and subclass areas determined through the Geographical Information System IDRISI presented the following values: IIe,s (22,64%), IIIe (8,62%), IIIe,s (15,83%), IIIs (29,97%), IVe (10,82%), VIe (3,95%) and VIIe (0,96%).  The results allowed to infer that the most significant sub classes were IIIs and IIe,s. The 0 to 20% sloping classes have occurred in more than ¾ of the district. Plane areas were the most significant since they occur in nearly 1/3 of the whole area. The Geographical Information System IDRISI has been an excellent tool to determine land use capability, specially related with geo-processing use. The later also facilitates the input, analysis and display of spatial environmental information as well as data digital storage which could be used for other analyses in further geo-environmental design.  KEYWORDS: Geoprocessing, land-use capability, Geographical Information Systems.

scholarly journals Research on Identification of Multiple Cropping Index of Farmland and Regional Optimization Scheme in China Based on NDVI Data

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 861
Author(s):  
Tingting Li ◽  
Yanfei Wang ◽  
Changquan Liu ◽  
Shuangshuang Tu
Keyword(s):  
Land Use ◽  
Growth Zone ◽  
Land Use Intensity ◽  
Multiple Cropping ◽  
Optimization Scheme ◽  
Potential Growth ◽  
Development Zone ◽  
Filtering Method

The multiple cropping index of farmland is a significant characterization of land use intensity. Based on the NDVI data, this paper calculated the multiple cropping index of farmland in China using the S-G filtering method, and proposed an optimized regionalization scheme for the farmland use. The findings reveal that from 2000 to 2018, the multiple cropping index of farmland in China underwent the fluctuation of rising first, then falling and rising continuously, which was closely associated with the agricultural support policies enforced in China. Counties whose multiple cropping indexes decreased from 2009 to 2018 were mainly located in areas primarily producing grain, which exerted a greater influence on food security. The gap between the multiple cropping index and potential multiple cropping index of farmland is increasingly widening from north to south in China. Accordingly, four types of grain producing zones were delineated: key development zone, potential growth zone, appropriate development zone, and restricted development zone. Some suggestions, such as rotation, fallow, determination of yield by water and offsetting the quantity balance of farmland by increasing the multiple cropping index, are put forward based on different zones.

scholarly journals Analysis of Spatiotemporal Land Use and Land Cover Changes using Remote Sensing and GIS: A Review

2018 ◽  
Vol 7 (4.34) ◽  
pp. 159
Author(s):  
Kabir Abdulkadir Gidado ◽  
Mohd Khairul Amri Kamarudin ◽  
Nik Ahmad Firdausaq ◽  
Aliyu Muhammad Nalado ◽  
Ahmad Shakir Mohd Saudi ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Land Cover ◽  
Supervised Classification ◽  
Agricultural Land ◽  
Accuracy Assessment ◽  
Geographical Information ◽  
Lulc Changes ◽  
Detection Analysis ◽  
Socio Economic Factors

The land-use and land-cover (LULC) pattern of an area is an outcome of natural and socio-economic factors and their use spatially by man; this LULC varies from the forest, water body, agricultural land and so on. Remote Sensing (RS) and Geographical Information System (GIS) studies have predominantly focused on providing the technical knowledge of, where, and the type of LULC change that has occurred and its impacts on man and the environment. Knowledge about LULC changes is essential for understanding the relationships and interfaces between humans and the natural environment. The purpose of this article is to review the previous studies of the spatiotemporal LULC changes. However, thirty (30) articles were reviewed from 2011 to 2017. However, these articles studied the LULC, classification, changes and change detection analysis, using different methods and software of RS and G.I.S. The finding shows that these articles have overall accuracy assessment ranges from 75% to 95% validations. Also, supervised classification in Maximum Likelihood Algorithm method was mostly employed for the LULC classification. Moreover, these reviewed articles confirmed that LULC changes are imminent as a result of both natural and human factors which lead to increase and decrease of one LULC cover to another. Therefore proper monitoring of LULC changes when applied help the relevant government bodies, agencies and environmental managers utilise the environment to the fullest.  

scholarly journals GEOPROCESSAMENTO APLICADO NO DIAGNÓSTICO DOS CONFLITOS DE USO E OCUPAÇÃO DO SOLO EM ÁREAS DE PRESERVAÇÃO PERMANENTE NO RIBEIRÃO DAS AGULHAS – BOTUCATU (SP)

2017 ◽  
Vol 2 (6) ◽  
pp. 163
Author(s):  
Sérgio Campos et al.
Keyword(s):  
Land Use ◽  
Satellite Image ◽  
Well Being ◽  
Riparian Forests ◽  
Human Populations ◽  
Environmental Legislation ◽  
Water Turbidity ◽  
Environmental Function ◽  
Del Rio ◽  
Turbidity Increase

As áreas de preservação permanente (APP) têm função ambiental de preservar os recursos naturais, a biodiversidade, o fluxo gênico da fauna e flora, o solo e a segurança do bem-estar das populações humanas. Enquanto que a degradação das matas ciliares contribui para o assoreamento, elevação da turbidez da água e para a erosão das margens dos cursos d'água, transportando substâncias poluidoras, como defensivos e fertilizantes agrícolas. O trabalho visou determinar o uso inadequado das áreas de preservação permanente da microbacia do Ribeirão das Agulhas – Botucatu (SP), tendo como base cartográfica, a carta planialtimétrica de Botucatu e a imagem de satélite de 2011. A metodologia consistiu no uso do SIG-IDRISI Selva para realização do georreferenciamento da imagem, geração dos buffer de APPs e o overlay na obtenção dos conflitos de uso e ocupação em APPs. O grande uso da microbacia correspondeu às pastagens com 675,34ha. As APPs (166,10ha) estão sendo usadas inadequadamente por 93,33ha com pastagens. O diagnóstico dessas áreas da microbacia indica a necessidade de uma intervenção vinculada ao plano de proteção ambiental para a recuperação das áreas degradadas e consequentemente permitir uma regeneração da cobertura natural das APPs que estão sendo utilizadas sem respeitar a legislação ambiental brasileira. As ferramentas de geotecnologias foram imprescindíveis para obter o diagnóstico do uso e ocupação do solo em APPs da área.Palavras-chave: Sistema de Informação Geográfica; Uso e Ocupação do Solo; Preservação Ambiental.GEOPROCESSING APPLIED IN THE DIAGNOSIS OF CONFUSED GODS AND SOIL OCCUPATION IN AREAS OF PERMANENT PRESERVATION IN THE STREAM OF THE AGULHAS - BOTUCATU (SP)ABSTRACTThe permanent preservation areas (PPA) have environmental function of preserving natural resources, biodiversity, gene flow of fauna and flora, the soil and the safety of the well-being of human populations. While the degradation of riparian forests contributes to silting, water turbidity increase and the erosion of the banks of waterways, carrying pollutants, such as pesticides and agricultural fertilizers. The objective of this work was to determine the inadequate use of the permanent preservation areas of Stream of the Agulhas - Botucatu (SP) microbasin, based on cartography, Botucatu planialtimetric chart and satellite image of 2011. The methodology consisted of the use of SIG-IDRISI Jungle to perform image georeferencing, generation of PPA buffer and overlay in obtaining conflicts of use and occupation in PPA. The great use of the microbasin corresponded to pastures with 675.34ha. PPA (166, 10 ha) are being used inadequately for 93.33ha with pasture. The diagnosis of these areas of the microbasin indicates the need for an intervention linked to the environmental protection plan for the recovery of the degraded areas and consequently to allow a regeneration of the natural coverage of the PPA that are being used without respecting the Brazilian environmental legislation. The geotechnology tools are essential to obtain the diagnosis of land use and occupation in PPA in the area.Keywords: GIS; Land Use; Environmental Preservation.SIG APLICADOS EN EL DIAGNÓSTICO DE CONFLICTOS DE USO Y OCUPACIÓN DEL SUELO EN ÁREAS DE PRESERVACIÓN PERMANENTE EN EL RÍO DE LAS AGULHAS – BOTUCATU (SP)RESUMENLas Áreas de Preservación Permanente (APP) tienen una función ambiental para preservar los recursos naturales, la biodiversidad, el flujo genético de fauna y flora, el suelo y la seguridad del bienestar de las poblaciones humanas. La degradación de los bosques ribereños contribuye a la sedimentación e incremento en la turbidez del agua, a la erosión de las orillas de los cursos de agua y al transporte de sustancias contaminantes, como pesticidas y fertilizantes agrícolas. El trabajo tuvo como objetivo determinar el uso incorrecto de las áreas de preservación permanente de la cuenca del río das Agulhas – Botucatu (SP), basada en la carta planialtimétrica de Botucatu y la imagen de satélite de 2011. La metodología consistió en el uso de GIS-IDRISI Selva para la georreferenciación, la generación de los amortiguamientos de las APPs y la superposición de los conflictos de uso y ocupación. El gran uso de la cuenca se correspondió con pastizales, 675,34ha. Las APPs (166,10ha) se utilizan inadecuadamente, con 93, 33ha de pastizales. El diagnóstico indica la necesidad de un plan de protección vinculado al medio ambiente, y destinado a la recuperación de áreas degradadas, que permita la regeneración de la cubierta natural de las APPs, que se utilizan sin cumplir con la legislación ambiental brasileña. Las geotecnologías fueron herramientas indispensables para el diagnóstico del uso y ocupación del suelo en el área analizada.Palabras clave: SIG; Uso y Ocupación del Suelo; Preservación del Medio Ambiente.

HYDROGEOMORPHOLOGICAL MODELING OF KHOR OMAR OMDURMAN - SUDAN BY USING GIS

2020 ◽  
pp. 20-36
Author(s):  
Omar Abd Almajd Sayd AHMMAD ◽  
Alimam omar ALİMAM AİL ◽  
Hussein Salem Hussein SALEM ◽  
Muzamil Elrais Ahmed ALI
Keyword(s):  
Meteorological Data ◽  
Satellite Image ◽  
Curve Number ◽  
Digital Data ◽  
Geographical Information ◽  
Hydrologic Modelling ◽  
Model Soil ◽  
Digital Elevation ◽  
Elevation Model

e study addressed the hydro geomorphological modeling of koher Omar Oum Dorman Area by analyzing many digital data, including satellite Image, and Digital Elevation Model, soil and meteorological data, by using ARC.GIS -WMS - Hydrologic Engineering Center – Hydrologic Modelling System, (HEC-HMS). in order to analyzing geomorphological characteristics and hydro geomorphological, estimation of the amount of runoff and determination of affected areas through Hydro morphometric measurements, determination of soil varieties and land cover to extract Curve number (CN) the study found that the annual surface runoff volume is 21830.5M3 – 33938.1M3 areas affected by runoff are located to the east and south-east of the basin of koher Omar, and the study Reflced Meany recommendetoin, the most important of which is the utilization of water in development processes and the application of Geographical information system in hydro geomorphological studies. Key words: : GIS – RS - Rain off - WMS.

scholarly journals HEMI-SYNTHESIS AND UV-VISIBLE SPECTROPHOTOMETRIC CHARACTERIZATION OF 2,4-DINITROPHENYLHYDRAZONES DERIVED FROM CITRAL AND CITRONELLAL ESSENTIAL OILS OF TWO AROMATIC PLANTS ACCLIMATIZED IN CONGO-BRAZZAVILLE

2021 ◽  
Vol 9 (03) ◽  
pp. 581-593
Author(s):  
Ndzeli Likibi Belline ◽  
◽  
Loubaki Milandou Laurent ◽  
Nsikabaka Samuel ◽  
Ouamba Jean-Maurille ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Essential Oils ◽  
Eucalyptus Citriodora ◽  
Easy Method ◽  
Uv Visible ◽  
Congo Brazzaville ◽  
High Level ◽  
Short Time

The orange-yellow and colorless essential oils with respective yields of 1.54% and 3.59% were extracted from the dry leaves of Cymbopogoncitratus (DC.) Stapf and Eucalyptus citriodora Hook. collected south of Brazzaville. Analysis by gas chromatography (GC) and by gas chromatography coupled with mass spectrometry (GC/MS) allowed the identification of fifteen (15) and eight (8) constituents representing (96.25%) and (98.46%) of total essential oils respectively. Cymbopogoncitratus oil consists mainly of geranial (51.99%) and neral (32.94%), two geometric isomers constituting citral which occupies a rate of 84.93%. While citronellal with a high level of (80.72%) and citronellol (10.48%) are the major compounds of the essential oil of Eucalyptus citriodora. Geranial (citral a) and citronellal 2,4-dinitrophenylhydrazones were hemi-synthesized by a simple, easy method, respectively from essential oils of Cymbopogoncitratus and Eucalyptus citriodora with respective conversion rate (yields) of 20%. and 37%, in a short time (three to five minutes). Analysis of geranial and citronellal 2,4-dinitrophenylhydrazones by UV-visible spectrophotometry showed maximum absorption wavelengths of 390 nm and 370 nm respectively. The UV-visible spectrophotometric method employed for the determination of these hydrazones is convenient, fast and simple. The hemi-synthesized hydrazones could be useful in the pharmaceutical industry, in perfumery, cosmetic and in biomedicine.

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