Spectrographic Research Articles

PHONETIC MEANS OF EXPRESSING NEGATION IN MODERN BULGARIAN

The object of the current study are the phonetic means that express negation in Contemporary Bulgarian and that are part of the formal inventory of the functional and semantic category of polarity (and more precisely – part of the periphery of the negative polarity). Our interest on this topic was promoted by the lack of detailed research. The main goal here is to present a description of these specific characteristics by paying more attention to the role of intonation and stress in the speech realization of the phrases of interest. To achieve this goal, we have employed a variety of technological resources for rhythmic and melodic analysis, with the help of which we have conducted experimental research on our targeted phrases and provided graphic representation of melody and intensity of pronunciation, as well as spectrographic analysis of speech. Our data shows that stress and intonation are indeed differentiating factors in the meaning of the phonetic explicators we observe. Stress and intonation make t

Recognition of psychoneurological state of children with autism spectrum disorder by features of speech: acoustic and perceptual features

The work is devoted to studying of recognition of psychoneurological state of children aged 5–14 with autism spectrum disorder (ASD), n = 35, and typically developing (TD) children, n = 45, by adults. A perceptual analysis was carried out, in which adult native speakers of the Russian language (auditors), n = 206, took part. Test sequences (audiotests) with words and phrases of ASD and TD children selected from spontaneous speech recordings were created for perceptual research. Auditors’ task was to determine psychoneurological state of children (typical/atypical development) based on auditory perception. A spectrographic analysis of phrases of children was carried out. Phrases of ASD children in comparison with TD children are characterized by lower speech rate, fewer words, great stressed and unstressed vowel duration, great values of pitch in phrase, word, stressed and unstressed vowel.

Green dielectric exploration: spectrographic analysis and technical feasibility of vegetable oils in EDM via PIV, TOPSIS, and MOORA evaluation methods

Achieving a sustainable dielectric medium for Electrical Discharge Machining (EDM) has now drawn the attention of researchers and industries alike. Increased awareness among the Government and NGOs paved the way for the manufacturing industries to move towards a green environment and sustainability in the production process. To search for sustainable dielectric, 5 different types of oils viz., Jatropha, coconut, groundnut, sunflower, and EDM 4 oil (conventional oil) are experimented in this paper and revealed its suitability of potential replacement for the conventional dielectric. The properties such as viscosity, density, flash point, electrical conductivity, and BDV (Break down Voltage) are tested as per the standards. Since the number of output response is more than, Multi Attribute Decision Making (MADM) algorithms namely PIV, TOPSIS, and MOORA are used for the ranking and optimization. Entropy weight method is adopted to endow criteria weight to each of the MADM techniques. Jatropha oil has been ascertained to be rank 1 followed by groundnut, coconut, sunflower, and EDM 4 oil. Subsequently, the Gas Chromatography & Mass Spectrometry (GC–MS) analysis has revealed the quantitative constituents present in Jatropha as well as remaining oils. Furthermore GC–MS analysis reports that the retention time of Jatropha (43.042 min) is relatively longer than other oils except coconut oil, to release Ricinoleic acids. Groundnut and EDM 4 oils took relatively less retention time to release the alkanes. Machining performance was also conducted with the obtained dielectric and compared with conventional type oil (EDM 4 oil).

Novel heterocyclic amide derivatives containing a diphenylmethyl moiety: systematic optimizations, synthesis, antifungal activity and action mechanism.

The development of fungicides with low cross resistance, high efficacy and low resistance plays a central role in protecting crops, reducing yield losses, improving quality and maintaining global food security. Based on this important role, after a systematic optimization strategy, novel heterocyclic amide derivatives bearing diphenylmethyl fragment were screened, synthesized and verified with the spectrographic and x-ray diffraction analysis. In this study, the aforementioned optimization obtained compound B19 that was measured for antifungal activity against Rhizoctonia solani (median effective concentration, EC50 = 1.11 μg mL-1). Meanwhile, the anti-R. solani protective effect (79.34%) of compound B19 was evaluated in vivo at 100 μg mL-1, which is comparable to that of the control agent fluxapyroxad (80.67%). Thence, morphological observations revealed that compound B19 induced mycelium disruption and shrinking, mitochondrial number reduction and apoptosis acceleration, consistent with the results of the mitochondrial membrane potential and cell membrane permeability. Further investigations found that the potential target enzyme of compound B19 was SDH, which exerted fluorescence quenching dynamic curves similar to that of the commercialized SDHI fluxapyroxad. Additionally, research by molecular docking and MD simulations demonstrated that compound B19 had a similar binding mode acting on the surrounding residues in the SDH active pocket to that offluxapyroxad. The above results demonstrated that heterocyclic amide derivatives containing a diphenylmethyl moiety are promising scaffolds for targeting SDH of fungi and provide valuable antifungal leads with the potential to develop new SDH inhibitors. © 2024 Society of Chemical Industry.

Identifying Acoustic Variability Patterns in Spoken English of Fricative Consonants Among Pakistani Native Punjabi Speakers

This study examines the phonological variance in English pronunciation among elementary students who regularly speak Punjabi. It focuses on the distinctions between the pronunciation of consonant fricatives and Received Pronunciation (RP). Using a quantitative approach, 50 elementary students proficient in Punjabi were selected from public sector schools using judgmental and purposive sampling techniques. Data were collected through audio recordings of fricatives /f/, /v/, /θ/, /ð/, /s/, /z/, /ʃ/, /ʒ/, and /h/ in various word positions. Analysis using PRAAT software assessed intensity and pitch. Results revealed significant variations in fricative intensity and pitch compared to RP. /f/ had greater intensity, /v/ was subdued, and dental fricatives /θ/ and /ð/ showed reduced intensity. /s/ and /z/ varied extensively, /ʃ/ and /ʒ/ were pronounced with lower intensity and pitch, and /h/ had diminished intensity. Recommendations for educators include focusing on intensity and pitch exercises, using PRAAT for feedback, and emphasizing accurate speech organ placement. This study underscores the need for tailored pronunciation guidance for Punjabi-speaking students. Future research should explore additional phonetic features and employ spectrographic analysis.

Identifying Pronunciation Errors of the Phoneme Qaf in Al-Qur’an Reading by Non-Native Speakers: A Spectrographic Analysis

The accuracy of pronouncing Hijazi letters is crucial for reading the Qur'an effectively. Incorrect pronunciation not only disrupts the flow of reading but can also change the meaning of words and verses, thus deviating from the intended message. This study aims to identify and analyze the mispronunciation of the [q] phoneme by non-Arabic speakers using spectrography analysis. Spectrography analysis helps visualize the frequency, duration, and intensity of the sound produced when participants pronounce the [q] phoneme. The research utilized Praat Voice Analysis software version 6.3.17 to process voice recordings and identify differences in the pronunciation of the [q] phoneme. The research employed a comparative descriptive qualitative approach with a content analysis design. Data collection involved various techniques, including recording, listening, and transcription. Voice recordings of two 12-year-old participants and an Arabic native speaker were collected to compare the pronunciation of Surah Al-Falaq verses 1-3. The results indicated that common errors in this study included sound changes and the omission of the characteristic [q] phoneme. For instance, students often replaced the [q] phoneme with [k] due to the similarity in the articulation location of these two phonemes. Additionally, participants tended to read too quickly, not allowing sufficient time for accurate pronunciation. The study also revealed a significant difference in the articulation of Hijazi letters between male and female speaker. female speaker demonstrated more consistent pronunciation patterns, while male speaker may require further intervention to address articulation and phonological errors.

Comparison of TEVA vs. PRAAT in the Acoustic Characterization of the Tracheoesophageal Voice in Laryngectomized Patients.

Background: Previous studies have assessed the capability of PRAAT for acoustic voice analysis in total laryngectomized (TL) patients, although this software was designed for acoustic analysis of laryngeal voice. Recently, we have witnessed the development of specialized acoustic analysis software, Tracheoesophageal Voice Analysis (TEVA). This study aims to compare the analysis with both programs in TL patients. Methods: Observational analytical study of 34 TL patients where a quantitative acoustic analysis was performed for stable phonation with vowels [a] and [i] as well as spectrographic characterization using the TEVA and PRAAT software. Results: The Voice Handicap Index (VHI-10) showed a mean score of 11.29 ± 11.16 points, categorized as a moderate handicap. TEVA analysis found lower values in the fundamental frequency vs. PRAAT (p < 0.05). A significant increase in shimmer values was observed with TEVA (>20%). No significant differences were found between spectrographic analysis with TEVA and PRAAT. Conclusions: Tracheoesophageal speech is an alaryngeal voice, characterized by a higher degree of irregularity and noise compared to laryngeal speech. Consequently, it necessitates a more tailored approach using objective assessment tools adapted to these distinct features, like TEVA, that are designed specifically for TL patients. This study provides statistical evidence supporting its reliability and suitability for the evaluation and tracking of tracheoesophageal speakers.

EXPRESS: Landmark Publications in Analytical Atomic Spectrometry: Fundamentals and Instrumentation Development.

The almost-two-centuries history of spectrochemical analysis has generated a body of literature so vast that it has become nearly intractable for experts, much less for those wishing to enter the field. Authoritative, focused reviews help to address this problem but become so granular that the overall directions of the field are lost. This broader perspective can be provided partially by general overviews but then the thinking, experimental details, theoretical underpinnings and instrumental innovations of the original work must be sacrificed. In the present compilation, this dilemma is overcome by assembling the most impactful publications in the area of analytical atomic spectrometry. Each entry was proposed by at least one current expert in the field and supported by a narrative that justifies its inclusion. The entries were then assembled into a coherent sequence and returned to contributors for a round-robin review.

Sustainable potassium-doped graphene oxide from oak fruit agricultural waste for a synergistically improved nanofluid-surfactant slug for enhancing oil recovery

This study presents an eco-friendly solvothermal method for synthesizing potassium-doped graphene oxide (K-GO) from agricultural waste, specifically oak fruit. Various spectrographic analyses, including XRD, FTIR, Raman, and UV–Vis, confirmed the successful synthesis of graphene oxide. The synthesized K-GO was combined with different surfactants to create nanofluids to enhance oil recovery. Anionic sodium dodecyl sulfate (SDS) demonstrated the best performance among the surfactants tested. When 250 ppm of K-GO was added to a 2500 ppm SDS solution, the surface tension was reduced by over 10 %. The study of zeta potential experiments validated that the K-GO-SDS nanofluid is compatible with sandstone reservoirs. Furthermore, the interfacial tension between the K-GO-SDS nanofluid and crude oil decreased by approximately 40 %. Batch adsorption studies showed that the combination of SDS and K-GO significantly reduced surfactant loss to reservoir surfaces by up to 32 %. Additionally, incorporating K-GO resulted in a notable improvement in wettability alteration, with contact angle measurements showing an improvement of over 20°. The sustainable synthesis of potassium-doped graphene oxide (K-GO) facilitates synergistic interactions with sodium dodecyl sulfate (SDS), thereby optimizing the formulation of nanofluids for enhanced oil recovery applications. This combination demonstrates superior efficacy in accessing trapped oil compared to using surfactants alone, highlighting the significant potential of K-GO-SDS nanofluids in advancing oil recovery techniques.

Phonation Patterns in Spanish Vowels: Spectral and Spectrographic Analysis

This article provides a detailed examination of voice quality in word-final vowels in Spanish. The experimental task involved the pronunciation of words in two prosodic contexts by native Spanish speakers from diverse dialects. A total of 400 vowels (10 participants × 10 words × 2 contexts × 2 repetitions) were analyzed acoustically in Praat. Waveforms and spectrograms were inspected visually for voice, creak, breathy voice, and devoicing cues. In addition, the relative amplitude difference between the first two harmonics (H1–H2) was obtained via FFT spectra. The findings reveal that while creaky voice is pervasive, breathy voice is also common, and devoicing occurs in 11% of tokens. We identify multiple phonation types (up to three) within the same vowel, of which modal voice followed by breathy voice was the most common combination. While creaky voice was more frequent overall for males, modal voice tended to be more common in females. In addition, creaky voice was significantly more common at the end of higher prosodic constituents. The analysis of spectral tilt shows that H1–H2 clearly distinguishes breathy voice from modal voice in both males and females, while H1–H2 values consistently discriminate creaky and modal voice in male participants only.

Spectrochemical Analysis of Stainless Steel Using 355 nm and 1064 nm Nd:YAG Laser-induced Breakdown Spectroscopy

Spectrochemical Analysis of Stainless Steel Using 355 nm and 1064 nm Nd:YAG Laser-induced Breakdown Spectroscopy

Studying components of oral statements of children with dysarthria: a review of Russian and foreign research

The article presents a review of Russian and foreign research devoted to the analysis of various components of oral speech of children with dysarthria. A systematic review of publications from 2000 to 2023 on the problem of diagnosing dysarthria in children using subjective and instrumental methods including a total of 215 studies identified the following analysis criteria: type of article; analyzed components of oral speech (breathing, articulation, phonation, prosody); research methods. The analysis showed that the predominant amount of research devoted to the study of oral speech of children with dysarthria is based on psychological and pedagogical observation, digitalized methods are used less often. Objective speech characteristics of children with dysarthria obtained using instrumental assessment methods are highlighted: kinematic analysis, acoustic spectrographic analysis of speech, electromyography, electromagnetic articulography, electropalatography, etc. Familiarization of speech therapists with modern instrumental methods of examination will expand the understanding of the possibilities of obtaining objective data in the study of speech in children with dysarthria. This will allow us to identify new areas of research involving instrumental methods for the development of modern diagnostic and therapy methodologies to overcome dysarthria in childre

Modulating Excited State Properties and Ligand Ejection Kinetics in Ruthenium Polypyridyl Complexes Designed to Mimic Photochemotherapeutics.

Ruthenium(II) polypyridyl complexes have gained significant interest as photochemotherapeutics (PCTs) due to their synthetic viability, strong light absorption, well understood excited state properties, and high phototoxicity indexes. Herein, we report the synthesis, characterization, electrochemical, spectrochemical, and preliminary cytotoxicity analyses of three series of ruthenium(II) polypyridyl complexes designed to mimic PCTs. The three series have the general structure of [Ru(bpy)2(N-N)]2+ (Series 1), [Ru(bpy)(dmb)(N-N)]2+ (Series 2), and [Ru(dmb)2(N-N)]2+ (Series 3, where N-N is a bidentate polypyridyl ligand, bpy = 2,2'-bipyridine, and dmb = 6,6'-dimethyl-2,2'-bipyridine). In the three series, the N-N ligand was systematically modified to incorporate increased conjugation and/or electronegative heteroatoms to increase dπ-π* backbonding, red-shifting the lowest energy metal-to-ligand charge transfer (MLCT) absorptions from λmax = 454 to λmax = 580 nm, nearing the therapeutic window for PCTs (600-1100 nm). In addition, steric bulk was systematically introduced through the series, distorting the Ru(II) octahedra, making the dissociative 3dd* state thermally accessible at room and body temperatures. This resulted in a 4 orders of magnitude increase in photoinduced ligand ejection kinetics, and demonstrates the ability to modulate both the MLCT* and dd* manifolds in the complexes, which is critical in PCT drug design. Preliminary cell viability assays suggest that the increased steric bulk to lower the 3dd* states may interfere with the cytotoxicity mechanism, limiting photoinitiated toxicity of the complexes. This work demonstrates the importance of understanding both the MLCT* and dd* manifolds and how they impact the ability of a complex to act as a PCT agent.

Analysis of failure characteristics of screen plates of ring hammer crusher used in coal handling applications

The screen plate, a critical component within a ring hammer crusher (also known as a ring granulator or rolling ring crusher), plays a vital role in the secondary crushing of coal. Functioning both as a platform for coal crushing and as a sieve to achieve the desired coal size, it is essential to understand and examine its failure characteristics to enhance its mechanical and wear resistance properties in coal handling applications. This study thoroughly explored the failure modes, mechanisms, and underlying causes of screen plate failures. Microscopic techniques such as optical microscopy (OM), scanning electron microscopy (SEM), Vickers microhardness test and spectrochemical analysis were utilised to identify the failure mechanism. Failure modes identified from the macroscopic analysis were discharged hole widening, hole wall break-off, plate edge crack, plate fracture, one-sided edge slimming, and general surface wear of the screen plate. The fractographic and wear track analysis identified the principal failure mechanisms of three-body abrasive wear, two-body sliding abrasion wear, shear-induced fatigue fracture and brittle shear fracture. The root causes of the failures are the rotor’s direct impact, defects in the parent material, the presence of hard materials in the coal and the use of unsuitable steel grade in the screen plate manufacturing. The service life of the screen plate can be improved through proper material selection, uniform crusher feeding, surface modification of the surface of the “as purchase” screen plate with appropriate wear-resistant materials, and adherence to good maintenance practices.

Changes in oral functions and speech when using custom-fitted mouthguards: An uncontrolled before-and-after study.

Mouthguards are crucial for protecting athletes against orofacial injuries, yet concerns persist regarding their potential impact on oral functions. This study aimed to investigate the effects of sports mouthguards on oral functions and speech over time. Thirty national rugby players received custom-fitted mouthguards. Questionnaire responses and speech recordings were collected before mouthguard use and at various intervals after using mouthguards: immediately, 1 week, 2 month, and 6 months. Spectrographic analysis was performed to measure voice onset time (VOT) for /p, b, t, d/ phonemes. Questionnaire responses were assessed with Friedman's test, while VOT changes were examined using one-way repeated measure analysis of variance. Compliance with mouthguard use improved during training and competitions, with consistent wear reported during matches. Over time, speaking difficulties and lisping decreased significantly (p < .001). The perception of nausea improved (p < .001), stabilizing after 1 month (p = .414). Sensations of bulkiness declined (p < .001). Mouth dryness reduced steadily, with no occurrences reported by all players by the end of the study. None of the participants reported bad breath, ulcers, or redness in the mouth. VOT changed immediately after wearing mouthguards (p < .001), gradually regressing toward the baseline, although not completely reaching it. Players held a favorable view of mouthguard use, with comfort and support for mandatory use increasing over time. Custom-fitted mouthguards do not lead to significant long-term disruptions in oral functions. Athletes generally adapt to mouthguard use, reporting improved comfort and greater support for their use.

Conspicuous, green flowers are an honest signal of nectar rewards in a bird-pollinated tree (Fuchsia excorticata, Onagraceae)

Bird-pollinated flowers typically appear ‘red’. Fuchsia excorticata (Onagraceae), a gynodioecious tree species endemic to New Zealand, is a notable exception. It produces ‘green’, cauliflorous flowers at early stages in flower ontogeny, when pistils are receptive. Flowers later turn ‘red’ as they lose their receptivity. We conducted field observations and spectrographic analyses to test whether: (1) receptive, green-phase flowers are actually more conspicuous to avian pollinators against their natural backgrounds than unreceptive, red-phase flowers, (2) green-phase flowers produce more nectar, and (3) relationships between flower conspicuousness and nectar production are similar in females and hermaphrodites. Results showed that the reflectance properties of green-phase flowers sharply contrast ‘orange’ tree bark, their natural visual background, rendering them more conspicuous to the avian eye than red-phase flowers. Green-phase flowers also produced more nectar than red-phase flowers as an honest signal of rewards. Similar results were observed in both female and hermaphrodite plants. Overall results provide an unusual example of reversed flower-background colour contrasts, with ‘reddish’ hues being incorporated into the visual backgrounds of floral displays rather than being associated with the flowers themselves. They also illustrate that flower conspicuousness can serve as an honest signal of nectar rewards to pollinators.

Evidence of response process validity of a spectrographic voice analysis protocol

RESUMO Objetivo desenvolver a etapa de validade baseada nos processos de resposta do Protocolo de Análise Espectrográfica da Voz (PAEV). Métodos foram recrutados dez fonoaudiólogos e dez alunos de graduação em Fonoaudiologia, que aplicaram o PAEV em dez espectrogramas, realizaram o julgamento dos itens do PAEV e participaram de uma entrevista cognitiva. A partir das respostas, o PAEV foi reanalisado para reformulação ou para exclusão de itens. Utilizou-se o teste Qui-Quadrado e os valores de acurácia para análise das respostas dos questionários, assim como análise qualitativa dos dados da entrevista cognitiva. Resultados os participantes obtiveram acurácia maior que 70% na maioria dos itens do PAE. Apenas sete itens alcançaram acurácia menor ou igual a 70%. Houve diferença entre as respostas de presença versus ausência de dificuldade na identificação dos itens no espectrograma. A maioria dos participantes não teve dificuldade na identificação dos itens do PAEV. Na entrevista cognitiva, apenas seis itens não obtiveram correta identificação da intenção, conforme verificado na análise qualitativa. Além disso, os participantes sugeriram exclusão de cinco itens. Conclusão após a etapa de validação baseada nos processos de resposta, o PAEV foi reformulado. Sete itens foram excluídos e dois itens foram reformulados. Dessa forma, a versão final do PAEV após essa etapa foi reduzida de 25 para 18 itens, distribuídos nos cinco domínios.

Comparative Study of Degradation Features in Proton Exchange Membrane Water Electrolysis: Irregular Renewable Energy Vs Regular Steady-State/Dynamic Loads

Green hydrogen production is currently on the rise, and it is reshaping the future of the energy sector. Numerous hydrogen roadmaps and projects are scaling up this technology in various target sectors, which necessitates cost reduction for green hydrogen implementation. Proton exchange membrane water electrolysis coupled with the renewable energy source (PEMWE-ReS) is a promising technology that offers notable advantages to decrease the electricity cost by using wind generation and solar photovoltaic system. However, to meet the growth of green hydrogen technology, accurate lifetime assessment and subsequent development of durable materials should be considered. In this regard, this presentation will discuss a comparative analysis of stability test results based on various load-ranges. In particular, to consider the PEMWE-ReS coupling, a realistic solar profile was simulated and applied for PEMWE cell measurement. The results were then compared to previous steady-state and dynamic loads to gain insight into the differences in degradation patterns at field and laboratory scale. For this purpose, the degradation features were systematically analyzed with electrochemical, microscopic, and spectrochemical analyses to see the dynamic of overpotential changes, membrane chemical degradation, catalyst dissolution/migration/diffusion, and Ti porous transport layer passivation. Notably, a realistic solar profile that simulates PEMWE-ReS conditions is featured by the increased fluoride release rate due to cycling to low load, and Pt dissolution/diffusion to the anode. Given the degradation features of the realistic solar operation, it was determined that a combined pattern of specific steady-state and dynamic cycling loads can induce the degradation features of solar operation the most. The findings can provide useful insights for establishing accelerated stress test to diagnose system durability and for setting design guidance for durable materials.

Spectrochemical Analysis of Nutritional and Toxic Metals in Different Brands of Candies Using Advanced Diagnostic Approaches.

Candies are frequently consumed sweetened food products among children, and their consumption can expose them to potential toxins and contamination. The present study employed calibration-free-laser-induced breakdown spectroscopy (CF-LIBS) as a steadfast diagnostic technique to analyze the presence of nutritional and heavy metals in candies from various brands available in local markets in Haripur, Pakistan. A pulsed Nd-YAG laser was used to create a microplasma on the target surface. The emitted light was collected using a dedicated spectrometer to analyze and quantify the species present in the candies. The analysis revealed the presence of micronutrients, macronutrients, and trace toxic metals such as Ca, K, Mg, Fe, Na, Al, Pb, Cr, Mn, Zn, Cu, and Ni. The optimization of our LIBS system was achieved through a parametric dependence study. The confirmation of the assumption of local thermodynamic equilibrium was achieved by assessing McWhirter's criterion and considering the relaxation time and the diffusion length of atoms in plasma. The highest concentrations (measured in mg/kg) of Pb, Cr, and Mn were determined to be 15 mg/kg, 340 mg/kg, and 880 mg/kg, respectively. The levels of Pb and Cr were found to be well above the maximum accepted limit set by the WHO. Similarly, the concentration of Mn in S-4 and S-5 exceeded the permissible limits set by the WHO. However, Zn, Cu, and Ni were found within safe limits in all the collected samples. In addition, the abundance obtained through CF-LIBS was compared to the concentration of similar (duplicate) candies samples analyzed using a standard analytical technique like inductively coupled plasma-optical emission spectroscopy. Excellent harmony could be seen in both outcomes. Moreover, energy-dispersive X-ray spectroscopy (EDX) was also utilized to confirm the presence of detected toxins. The significance of our findings lies in creating awareness among the public about the health risks associated with consuming toxins through candies, thereby protecting numerous human lives.

Evaluation of dyeing properties of Eclipta Alba L. on protein yarn and their chemical analysis

Dyes are colored substances used to color fibers, leather, paper or foodstuffs etc. Due to the benign nature of dye extracted from natural sources, more importance is given on this area. Natural dyes also protect us from harmful UV rays of the sun and also provide superior quality sensory feelings in contrast to the carcinogenic effect of synthetic dyes. In this study, natural dyes present in the Eclipta alba L(Hassk) were extracted using conventional techniques under different operating conditions. Potential of the chemicals obtained from the extracts of Eclipta alba. L. was evaluated by coloring pure yarn of silk and wool. Various metal salts were used as mordants to set extracted dye on the fabrics and yarns. The result showed a variation of attractive and earthly green hue on silk and wool. The phyto chemical analysis of the extract reveals that three chemical compounds wedelolactone, apigenin and luteolin are mainly responsible for different shades of bluish green colour extract of the Eclipta alba plant. Spectrochemical analysis was done to identify the compounds present in the dye extract.