Готові списки джерел за темами / Synthetic natural ga

Добірка наукової літератури з теми "Synthetic natural ga"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Synthetic natural ga"

1

Song, Hyunwook, Seungik Jeon, Yerim Shin, Woojae Han, Saea Kim, Chanbeom Kwak, Eunsung Lee, and Jinsook Kim. "Effects of Natural Versus Synthetic Consonant and Vowel Stimuli on Cortical Auditory-Evoked Potential." Journal of Audiology and Otology 26, no. 2 (April 10, 2022): 68–75. http://dx.doi.org/10.7874/jao.2021.00479.

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Background and Objectives: Natural and synthetic speech signals effectively stimulate cortical auditory evoked potential (CAEP). This study aimed to select the speech materials for CAEP and identify CAEP waveforms according to gender of speaker (GS) and gender of listener (GL).Subjects and Methods: Two experiments including a comparison of natural and synthetic stimuli and CAEP measurement were performed of 21 young announcers and 40 young adults. Plosive /g/ and /b/ and aspirated plosive /k/ and /p/ were combined to /a/. Six bisyllables–/ga/-/ka/, /ga/-/ba/, /ga/-/pa/, /ka/-/ba/, /ka/-/pa/, and /ba/-/pa/–were formulated as tentative forwarding and backwarding orders. In the natural and synthetic stimulation mode (SM) according to GS, /ka/ and /pa/ were selected through the first experiment used for CAEP measurement.Results: The correction rate differences were largest (74%) at /ka/-/ pa/ and /pa/-/ka/; thus, they were selected as stimulation materals for CAEP measurement. The SM showed shorter latency with P2 and N1-P2 with natural stimulation and N2 with synthetic stimulation. The P2 amplitude was larger with natural stimulation. The SD showed significantly larger amplitude for P2 and N1-P2 with /pa/. The GS showed shorter latency for P2, N2, and N1-P2 and larger amplitude for N2 with female speakers. The GL showed shorter latency for N2 and N1-P2 and larger amplitude for N2 with female listeners.Conclusions: Although several variables showed significance for N2, P2, and N1-P2, P1 and N1 did not show any significance for any variables. N2 and P2 of CAEP seemed affected by endogenous factors.
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Kloprogge, J. Theo, and Concepcion P. Ponce. "Spectroscopic Studies of Synthetic and Natural Saponites: A Review." Minerals 11, no. 2 (January 23, 2021): 112. http://dx.doi.org/10.3390/min11020112.

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Saponite is a trioctahedral 2:1 smectite with the ideal composition MxMg3AlxSi4−xO10(OH,F)2.nH2O (M = interlayer cation). Both the success of the saponite synthesis and the determination of its applications depends on robust knowledge of the structure and composition of saponite. Among the routine characterization techniques, spectroscopic methods are the most common. This review, thus, provides an overview of various spectroscopic methods to characterize natural and synthetic saponites with focus on the extensive work by one of the authors (JTK). The Infrared (IR) and Raman spectra of natural and synthetic saponites are discussed in detail including the assignment of the observed bands. The crystallization of saponite is discussed based on the changes in the IR and Raman spectra and a possible crystallization model is provided. Infrared emission spectroscopy has been used to study the thermal changes of saponite in situ including the dehydration and (partial) dehydroxylation up to 750 °C. 27Al and 29Si magic-angle-spinning nuclear magnetic resonance spectroscopy is discussed (as well as 11B and 71Ga for B- and Ga-Si substitution) with respect to, in particular, Al(IV)/Al(VI) and Si/Al(IV) ratios. X-ray photoelectron spectroscopy provides chemical information as well as some information related to the local environments of the different elements in the saponite structure as reflected by their binding energies.
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3

Mallick, Subhashis. "Some practical aspects of prestack waveform inversion using a genetic algorithm: An example from the east Texas Woodbine gas sand." GEOPHYSICS 64, no. 2 (March 1999): 326–36. http://dx.doi.org/10.1190/1.1444538.

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In this paper, a prestack inversion method using a genetic algorithm (GA) is presented, and issues relating to the implementation of prestack GA inversion in practice are discussed. GA is a Monte‐Carlo type inversion, using a natural analogy to the biological evolution process. When GA is cast into a Bayesian framework, a priori information of the model parameters and the physics of the forward problem are used to compute synthetic data. These synthetic data can then be matched with observations to obtain approximate estimates of the marginal a posteriori probability density (PPD) functions in the model space. Plots of these PPD functions allow an interpreter to choose models which best describe the specific geologic setting and lead to an accurate prediction of seismic lithology. Poststack inversion and prestack GA inversion were applied to a Woodbine gas sand data set from East Texas. A comparison of prestack inversion with poststack inversion demonstrates that prestack inversion shows detailed stratigraphic features of the subsurface which are not visible on the poststack inversion.
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4

Mayadewi, Ni Nyoman Ari, and Nyoman Gede Astawa. "QUALITY ENHANCEMENT OF TOMATOES (Lycopersicum esculentum Mill.) USING GIBBERELLIC ACID (GA) FROM VARIOUS PLANT MATERIALS." International Journal of Biosciences and Biotechnology 9, no. 1 (January 26, 2022): 60. http://dx.doi.org/10.24843/ijbb.2021.v09.i01.p07.

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Tomato (Lycopersicum esculentum Mill.) is a fruit with many benefits. Plant growth regulators (PGRs) prove effective in improving the quality and production of tomatoes. Gibberellic Acid/GA is a PGR that stimulates the process of flowering, parthenocarpy, and carbohydrate mobilization during germination and influences other plant physiological aspects. However, because synthetic GA is costly, numerous natural ingredients have been proposed as its source, for example, bamboo shoots, vegetable ferns, corns, and shallots that can improve the quality of tomatoes. This study aimed to determine the role of natural GA from various plant extracts on the quality of tomatoes, providing recommendations for the best extract to improve the quality of tomatoes. It was conducted in the experimental garden at the Agronomy and Horticulture Laboratory, Physiology Laboratory of the Faculty of Agriculture, and Food Analysis Laboratory of the Faculty of Agricultural Technology, Udayana University. This research was compiled using a Randomized Group Design consisting of one factor, i.e., the type of natural extract with five settings and four repetitions. The tomato plant treatments were E0 = no extract sprayed, BE = sprayed with bamboo shoot extract, VE = vegetable fern extract, OE = onion extract, and CE = corn extract. The results showed that gibberellins from natural ingredients significantly affected fruit diameter, fruit thickness, and total sugar content of tomatoes. The best tomatoes were obtained by applying onion extract as a source of natural gibberellins.
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Maharani, Nia. "PEMODELAN INVERSI DATA MAGNETOTELLURIK 1-D MENGGUNAKAN METODA GENETIC ALGORITHM (GA) DENGAN POPULASI MICRO GENETIC ALGORITHM KASUS 3 LAYER DAN 5 LAYER." Jurnal Santiaji Pendidikan (JSP) 8, no. 2 (January 10, 2019): 167–80. http://dx.doi.org/10.36733/jsp.v8i2.175.

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This paper discusses non-linear inversion method with Genetic Algorithm (GA) which inspired by natural selection process (survival for the fittest) and genetic using 20 populations (micro genetic algorithm). The method is applied to 1-D magnetotelluric inverted data with model parameter is resistivity as a function of depth. This research only uses synthetic data obtained from synthetic model. The model is homogeneous earth model with 3 and 5 layers. Perturbation of model is performed until minimum misfit between theoritical and observation data achieved. The 3 layers and 5 layers inversion processes are applied to 3 layers and 5 layers earth model respectively, with satisfactory results in other words it can reproduce the synthetic model.
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Semyonov, M. E., L. P. Kalacheva, and E. Y. Shits. "Studying of features of processes of formation and mechano-chemical processing synthetic hydrates of natural ga." "Proceedings" of "OilGasScientificResearchProjects" Institute, SOCAR, no. 4 (December 30, 2014): 40–45. http://dx.doi.org/10.5510/ogp20140400220.

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Tyagi, Rekha, Surjeet Verma, Shikha Mishra, Mrigank Srivastava, Sarfaraz Alam, Feroz Khan, and Santosh Kumar Srivastava. "In Vitro and In Silico Studies of Glycyrrhetinic Acid Derivatives as Anti- Filarial Agents." Current Topics in Medicinal Chemistry 19, no. 14 (August 28, 2019): 1191–200. http://dx.doi.org/10.2174/1568026619666190618141450.

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Background: Lymphatic filariasis is one of the chronic diseases in many parts of the tropics and sub-tropics of the world despite the use of standard drugs diethylcarbamazine and ivermectin because they kill microfilaries and not the adult parasites. Therefore, new leads with activity on adult parasites are highly desirable. Objective: Anti-filarial lead optimization by semi-synthetic modification of glycyrrhetinic acid (GA). Methods: The GA was first converted into 3-O-acyl derivative, which was further converted into 12 amide derivatives. All these derivatives were assessed for their antifilarial potential by parasite motility assay. The binding affinity of active GA derivatives on trehalose-6-phosphate phosphatase (Bm-TPP) was assessed by molecular docking studies. Results: Among 15 GA derivatives, GAD-2, GAD-3, and GAD-4 were found more potent than the GA and standard drug DEC. These derivatives reduced the motility of Brugia malayi adult worms by up to 74% while the GA and DEC reduced only up to 49%. Further, GA and most of its derivatives exhibited two times more reduction in MTT assay when compared to the standard drug DEC. These derivatives also showed 100% reduction of microfilariae and good interactions with Bm-TPP protein. Conclusion: The present study suggests that 3-O-acyl and linear chain amide derivatives of glycyrrhetinic acid may be potent leads against B. malayi microfilariae and adult worms. These results might be helpful in developing QSAR model for optimizing a new class of antifilarial lead from a very common, inexpensive, and non toxic natural product.
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8

Omoruyi, Jeffrey I., George E. Eriyamremu, Israel E. Ebhohimen, Oke A. Emuedo, and Edwina O. Uzunuigbe. "The Effect of Aqueous Extract of Gum Arabic on Hepato-renal Function During Ethanol Withdrawal Induced Stress in Wistar Rats." Avicenna Journal of Medical Biochemistry 10, no. 2 (December 4, 2022): 135–41. http://dx.doi.org/10.34172/ajmb.2022.2363.

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Background: Alcohol withdrawal syndrome (AWS) is a life-threatening condition affecting alcoholics who ceased or decreased their alcohol consumption. The synthetic drugs used to manage these consequences are not without undesirable effects; hence, the need for a natural and affordable approach is raised. Objectives: This study aimed at investigating the effect of aqueous extract of gum arabic (GA) on hepato-renal functions during ethanol withdrawal syndrome in Wistar rats. Methods: In phase I, dose-response for GA and alcohol for the study were determined. In phase II, the effect of GA on biomarkers during AWS was studied. A total of 60 male Wistar rats were used for the study. Blood and tissue samples were obtained at the end of stipulated periods of oral administration for biochemical and histological analysis, and biochemical parameters were analyzed by spectrophotometry. Results: In the dose-response study, there were no significant differences (P≥0.05) in serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities as well as in total bilirubin (TBIL), malondialdehyde (MDA), sodium ion (Na+), potassium ion (K+), and creatinine concentrations in groups treated with 200 mg/kg body weight (bw) and 400 mg/kg bw GA aqueous extract compared to the control group. However, significant alterations were observed in groups treated with 600 and 800 mg/kg bw GA extract. Furthermore, rats that received 5.5 mL/kg bw alcohol showed marked changes in biochemical parameters compared to the group that received 4.5 mL/kg bw and the control group. The results obtained in Phase II exhibited the hepato-renal protective effect of GA during ethanol withdrawal. Statistical analysis of the obtained results indicated a better response from the study groups that were pre-treated or co-administered with GA compared to the group that was post-treated. Conclusion: The result of this study suggests that GA aqueous extract offered better protection prophylactically than curatively.
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9

Walden, Brian E., Allen A. Montgomery, Robert A. Prosek, and David B. Hawkins. "Visual Biasing of Normal and Impaired Auditory Speech Perception." Journal of Speech, Language, and Hearing Research 33, no. 1 (March 1990): 163–73. http://dx.doi.org/10.1044/jshr.3301.163.

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Intersensory biasing occurs when cues in one sensory modality influence the perception of discrepant cues in another modality. Visual biasing of auditory stop consonant perception was examined in two related experiments in an attempt to clarify the role of hearing impairment on susceptibility to visual biasing of auditory speech perception. Fourteen computer-generated acoustic approximations of consonant-vowel syllables forming a /ba-da-ga/ continuum were presented for labeling as one of the three exemplars, via audition alone and in synchrony with natural visual articulations of /ba/ and of /ga/. Labeling functions were generated for each test condition showing the percentage of /ba/, /da/, and /ga/ responses to each of the 14 synthetic syllables. The subjects of the first experiment were 15 normal-hearing and 15 hearing-impaired observers. The hearing-impaired subjects demonstrated a greater susceptibility to biasing from visual cues than did the normal-hearing subjects. In the second experiment, the auditory stimuli were presented in a low-level background noise to 15 normal-hearing observers. A comparison of their labeling responses with those from the first experiment suggested that hearing-impaired persons may develop a propensity to rely on visual cues as a result of long-term hearing impairment. The results are discussed in terms of theories of intersensory bias.
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10

Ayvaz, Melek Col. "Antioxidant activity of Trachystemon orientalis (L.) G. Don (Borage) grown and eaten as food in Ordu, Turkey." Herba Polonica 61, no. 4 (December 1, 2015): 40–51. http://dx.doi.org/10.1515/hepo-2015-0030.

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SummaryIntroductıon: Instead of synthetic antioxidants, using of natural products with antioxidant activity is demanded.Objectıve: The aim of this study is to evaluate the antioxidant activity and total phenolic and flavonoid contents of theTrachystemon orientalis(borage) obtained from Ordu.Methods: The water and ethanol extracts of the borage plant were investigated by using severalin vitroantioxidant activity tests such as total antioxidant capacity, O2•−,•OH, DPPH and ABTS radicals scavenging activities, hydrogen peroxide scavenging activity, FRAP, Fe2+chelating and reducing power assays in order to make effective comparisons.Results: Water extract of theT. orientalishad the more phenolic (90 mg GA/g extract) and flavonoid (56.88 mg CT/g extract) contents than ethanol extract. Furthermore, both of the extracts showed strong antioxidant and radical scavenging activities determined by differentin vitromodels. The highest total antioxidant capacity as ascorbic acid equivalents of 244.50 mg/g extract was also calculated for water extract. Generally, a relationship between total phenolic content and antioxidant activity was established. It is also an important finding for an edible food source that the phenolic and flavonoid content and antioxidative activities for water extract was higher than the ethanol extract.Conclusıon:T. orientaliscould be used as a food ingredient instead of synthetic antioxidants and all results will contribute to the recent increase in investigations on using natural products in many areas such as food, pharmacy, alternative medicine and natural therapy.
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Частини книг з теми "Synthetic natural ga"

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Murphy, Benjamin S., Paul A. Bedrosian, and Anna Kelbert. "Geoelectric constraints on the Precambrian assembly and architecture of southern Laurentia." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(13).

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ABSTRACT Using images from an updated and expanded three-dimensional electrical conductivity synthesis model for the contiguous United States (CONUS), we highlight the key continent-scale geoelectric structures that are associated with the Precambrian assembly of southern Laurentia. Conductivity anomalies are associated with the Trans-Hudson orogen, the Penokean suture, the ca. 1.8–1.7 Ga Cheyenne belt and Spirit Lake tectonic zone, and the Grenville suture zone; the geophysical characteristics of these structures indicate that the associated accretionary events involved the closure of ancient ocean basins along discrete, large-scale structures. In contrast, we observe no large-scale conductivity anomalies through the portion of southern Laurentia that is generally viewed as composed of late Paleoproterozoic–early Mesoproterozoic accretionary crust. The lack of through-going conductors places constraints on the structure, petrology, and geodynamic history of crustal growth in southern Laurentia during that time period. Overall, our model highlights the enigmatic nature of the concealed Precambrian basement of much of southern Laurentia, as it in some places supports and in other places challenges prevailing models of Laurentian assembly. The revised CONUS electrical conductivity model thus provides important constraints for testing new models of Precambrian tectonism in this region.
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Тези доповідей конференцій з теми "Synthetic natural ga"

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Schwikkard, S., J. Hiles, E. Opara, H. Whitmore, T. Corson, and D. Mulholland. "Natural and Synthetic Homoisoflavonoids and Related Compounds for the Treatment of Macular Degeneration." In GA – 70th Annual Meeting 2022. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1759133.

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Andrijauskaite, Kristina, and Michael J. Wargovich. "Abstract 3020: Natural & synthetic glucocorticoids induce therapy resistance in breast cancer in vitro." In Proceedings: AACR Annual Meeting 2019; March 29-April 3, 2019; Atlanta, GA. American Association for Cancer Research, 2019. http://dx.doi.org/10.1158/1538-7445.am2019-3020.

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Andrijauskaite, Kristina, and Michael J. Wargovich. "Abstract 3020: Natural & synthetic glucocorticoids induce therapy resistance in breast cancer in vitro." In Proceedings: AACR Annual Meeting 2019; March 29-April 3, 2019; Atlanta, GA. American Association for Cancer Research, 2019. http://dx.doi.org/10.1158/1538-7445.sabcs18-3020.

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Üner, G., P. Ballar-Kırmızıbayrak, and E. Bedir. "A new semi-synthetic sapogenol derivative inducing regulated necrosis." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3399943.

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Yakuboğulları, N., D. Sağ, A. Çağır, and E. Bedir. "Semi-synthetic studies on astragaloside VII and immunomodulatory activities of the derivatives." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3400088.

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Nachtergael, Amandine, Déborah Lanterbecq, Martin Spanoghe, Alexandra Belayew, and Pierre Duez. "Effects of natural compounds on the accuracy of 8-oxo-7,8-dihydro-2'-deoxyguanosine translesion synthesis." In GA – 69th Annual Meeting 2021, Virtual conference. Georg Thieme Verlag, 2021. http://dx.doi.org/10.1055/s-0041-1736761.

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