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Journal articles on the topic 'Polarity profile'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Horčin, V., and I. Findová. "The use of polarity profiles of texture in the sensory evaluation of apples." Czech Journal of Food Sciences 18, No. 4 (2000): 143–47. http://dx.doi.org/10.17221/8333-cjfs.

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Research in the quality of horticultural products commonly applies sensory analysis which under minimized subjectivity approaches or coincides with other analytical methods with respect to its accuracy. Sensory analysis comprises many methods and tests. This article considers the test of textural polarity profile. Polarity profilograms are constructed for 29 varieties and new breeds of apple. The descriptors used characterize the textural quality of fresh and stored apples. The main advantage of polarity profiles is that they enable to determine not only differences between samples and varieti

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Dzikovski, Boris G., Vsevolod A. Livshits, and Derek Marsh. "Oxygen Permeation Profile in Lipid Membranes: Comparison with Transmembrane Polarity Profile." Biophysical Journal 85, no. 2 (2003): 1005–12. http://dx.doi.org/10.1016/s0006-3495(03)74539-1.

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3

BURSILL, L. A., PENG JU LIN, and DAVID J. SMITH. "SURFACE POLARITY OF ALUMINA." Modern Physics Letters B 01, no. 03 (1987): 115–18. http://dx.doi.org/10.1142/s0217984987000168.

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Atomic-resolution electron microscopic surface profile images of sapphire are reported for the first time. Comparison of experimental images with computer simulations, leads to the realization that aluminium and oxygen atom surface terminations may be distinguished, for both neutral and charged surfaces. Hence surface polarity, as well as details of surface step structure and mobility may be determined. Positive surface polarity is preferred.

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Gandi, Vinod Kumar, Rishi Verma, Manoj Warrier, and Archana Sharma. "Effect of Electrode Profile and Polarity on Performance of Pressurized Sparkgap Switch." Plasma 5, no. 1 (2022): 130–45. http://dx.doi.org/10.3390/plasma5010010.

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Sparkgap are most widely used closing switches in various high-voltage pulsed power systems and its reliable operation at desired voltage level is very essential. Conventionally by adjusting the filling gas pressure inside sparkgap switch, breakdown voltage level is altered but switching characteristics such as stability in hold-off voltage at various pressures, breakdown delay, plasma channel formation, and erosion rate are mainly dictated by adopted electrode profile and its dimensions, inter-electrode gap length and polarity. In this paper, experimental results obtained on breakdown charact

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Klebanov, Beata Beigman, Nitin Madnani, and Jill Burstein. "Using Pivot-Based Paraphrasing and Sentiment Profiles to Improve a Subjectivity Lexicon for Essay Data." Transactions of the Association for Computational Linguistics 1 (December 2013): 99–110. http://dx.doi.org/10.1162/tacl_a_00213.

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We demonstrate a method of improving a seed sentiment lexicon developed on essay data by using a pivot-based paraphrasing system for lexical expansion coupled with sentiment profile enrichment using crowdsourcing. Profile enrichment alone yields up to 15% improvement in the accuracy of the seed lexicon on 3-way sentence-level sentiment polarity classification of essay data. Using lexical expansion in addition to sentiment profiles provides a further 7% improvement in performance. Additional experiments show that the proposed method is also effective with other subjectivity lexicons and in a di

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Martín-Nieto, Marta, Damián Castaño, Sergio Horta Muñoz, and David Ruiz. "Simplification of Electrode Profiles for Piezoelectric Modal Sensors by Controlling Gap-Phase Length." Mathematics 12, no. 10 (2024): 1525. http://dx.doi.org/10.3390/math12101525.

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This paper presents a method to optimize and simplify the electrode profile of a piezoelectric modal sensor. At the same time that the electrode profile is optimized to maximize the charge, a null-polarity phase is introduced. This gap-phase is modeled using the normalized norm of the spatial gradient of the polarity profile along with a two-step filtering and projection technique. High-order vibration modes generate a complex polarization profile that makes the manufacturing process difficult. The novelty of the proposed method is the addition of a constraint on the length of the interface in

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Makita, Mitsugu, and Hajime Kawakami. "A Study of Line Asymmetry in Unipolar Sunspots." Publications of the Astronomical Society of Japan 38, no. 2 (1986): 257–65. https://doi.org/10.1093/pasj/38.2.257.

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Abstract The asymmetry of the line profile of Fe i 6301.5 Å in the spectrum of unipolar sunspots was analyzed. Most bisectors of the line profile could be approximated by straight lines and interpreted in terms of the variation of the line-of-sight velocity. The analysis of these bisectors, under the assumption of cylindrical symmetry, gives a sunspot velocity structure consistent with that deduced from the Evershed outflow and inflow. The azimuthal flow will increase downward to satisfy the vorticity-polarity rule proposed by the Meudon observers. Among the line profiles not approximated by t

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8

Kumar, Dinesh, Rajesh Thipparaboina, Bojja Sreedhar, and Nalini R. Shastri. "The role of surface chemistry in crystal morphology and its associated properties." CrystEngComm 17, no. 35 (2015): 6646–50. http://dx.doi.org/10.1039/c5ce01182e.

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9

Martin, Vincent, Sandip Jadhav, Peter H. G. Egelund, et al. "Harnessing polarity and viscosity to identify green binary solvent mixtures as viable alternatives to DMF in solid-phase peptide synthesis." Green Chemistry 23, no. 9 (2021): 3295–311. http://dx.doi.org/10.1039/d1gc00603g.

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10

Murty, G. R. K., Y. Satyanarayana, and T. Pradeep Kumar. "Magnetic Profile Across Gulf of Mannar." Journal Geological Society of India 44, no. 4 (1994): 443–49. http://dx.doi.org/10.17491/jgsi/1994/440410.

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Abstract A study of the spectral analysis and two-dimensional modelling of magnetic data collected along the track of 200 km traversing the southern part of the Gulf of Mannar indicates the presence of an anomalous body within the basement. The total field magnetic anomaly along the track is well explained by variations in the topogrphy of the anomalous body of normal polarity and uniform magnetisation. The model shows a topographic relief of about 6 km. The presence of volcanic vents in this area suggests that the anomalous body could be more basic in nature having high susceptibilty values.

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11

Dillon, William G., and Terry W. Spencer. "Improved interface detection for vertical seismic profile inversion." GEOPHYSICS 53, no. 9 (1988): 1244–47. http://dx.doi.org/10.1190/1.1442566.

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Grivelet (1985) presented an interface detection scheme as part of his iterative modeling approach to vertical seismic profile (VSP) inversion. In his scheme and those like it (Dillon, 1985), the interfaces which produce major reflections must be identified for reasons of stability and uniqueness. In general, Grivelet’s detection algorithm works well, though it sometimes fails when two events of the same polarity and amplitude overlap. By extending his detection algorithm, we obtain more robust interface detection.

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Moshammer, Hanns, Dietmar Oettl, Michael Mandl, Michael Kropsch, and Lisbeth Weitensfelder. "Comparing Annoyance Potency Assessments for Odors from Different Livestock Animals." Atmosphere 10, no. 11 (2019): 659. http://dx.doi.org/10.3390/atmos10110659.

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(1) Background: When it comes to estimating the annoyance potency of odors, European countries relate to different guidelines. In a previous study we compared complaint rates for different agricultural odors, but due to different guidelines, the results we obtained are hard to generalize. (2) Methods: We compare our findings on complaint rates to Dutch and German findings on annoyance rates, using diverse regression models. We also discuss whether the use of the polarity profile for hedonic odor quality could improve annoyance potency assessment. This is demonstrated by comparing the graphical

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Nilamsari, Elvian Indah, L. Hartanto Nugroho, and Sukirno Sukirno. "Bioactive Compund Profile of Muntingia Calabura Leaf Extract with Different Polarity Solvent." Syntax Literate ; Jurnal Ilmiah Indonesia 8, no. 10 (2023): 6035–46. http://dx.doi.org/10.36418/syntax-literate.v8i10.13819.

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The pursuit of bioactive compounds from natural sources for potential pharmaceutical and therapeutic applications remains a prominent focus of scientific investigation. Among the myriad of botanical treasures, M. calabura, colloquially known as the Jamaican cherry or strawberry tree, stands as an intriguing candidate, owing to its extensive historical utilization in folk medicine across diverse cultures. This study aimed to comprehensively characterize the bioactive compound profile of M. calabura leaves by employing a spectrum of solvents with varying polarities for extraction. The choice of

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Lozitsky, V. "Measurements of spatially unresolved magnetic fields of mixed polarity using observations of the Zeeman effect in the solar faculae." Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 58 (2018): 23–28. http://dx.doi.org/10.17721/btsnua.2018.58.23-28.

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It is shown that it is quite possible to measure spatially unresolved magnetic fields of mixed polarity by the Zeeman effect if their intensity exceeds 150-200 G. This means that one can interconnect the ranges of the registration of these fields based on the Hanle and Zeeman effects. This thesis is illustrated by the results of calculations of the half-width of the Stokes profile I for the FeI 5247.1 and 5250.2 lines. Parameter I is sensitive to the presence of magnetic fields, regardless of whether they have the same magnetic polarity within the input aperture of the instrument, or the oppos

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Nielson, Kaitlyn J., Edgar G. Fischer, Jacklyn Jacklyn Nemunaitis, Sangeetha Prabhakaran, and Nadja K. Falk. "Breast tall cell carcinoma with reversed polarity with an unusual molecular profile." Case Reports in Clinical Pathology 7, no. 1 (2020): 46. http://dx.doi.org/10.5430/crcp.v7n1p46.

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Breast tall cell carcinoma with reversed polarity (TCCRP) is rare and previously referred to as solid papillary carcinoma with reverse polarity. This low grade tumor commonly exhibits IDH2 p.Arg172 mutation, however is not completely understood at the molecular level. We present a case of TCCRP in a 55 year old woman with a 0.7 cm left breast mass. A core biopsy was performed with immunohistochemistry. Lumpectomy and sentinel lymph node biopsy were completed two months later. MammaPrint$^{\textregistered}$ and BluePrint$^{\textregistered}$ gene expression profilers were performed on an excisio

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16

Arakawa, Tomiyuki, Ryoichi Matsumoto, and Akio Kita. "Effect of Nitrogen Profile on Tunnel Oxynitride Degradation with Charge Injection Polarity." Japanese Journal of Applied Physics 35, Part 1, No. 2B (1996): 1491–95. http://dx.doi.org/10.1143/jjap.35.1491.

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17

Sanderson, Steven. "North-South Polarity in Inter-American Environmental Affairs." Journal of Interamerican Studies and World Affairs 36, no. 3 (1994): 25–48. http://dx.doi.org/10.2307/166525.

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Since the conclusion of the Earth Summit - or, more formally, the UN Conference on Environment and Development (UNCED) - in 1992, the world's political leaders have had to deal with an ambitious environmental agenda whose mission is nothing short of saving the biosphere, a spectacular quest that carries an equally impressive price tag. The acceleration of a global environmental agenda over the first part of the 1990s, combined with the accumulated commitments of earlier years - of which the Convention on International Trade in Endangered Species of Flora and Fauna (CITES), the Ivory Ban, and t

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Brown, R. James, Robert R. Stewart, and Don C. Lawton. "A proposed polarity standard for multicomponent seismic data." GEOPHYSICS 67, no. 4 (2002): 1028–37. http://dx.doi.org/10.1190/1.1500363.

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This paper proposes a multicomponent acquisition and preprocessing polarity standard that will apply generally to the three Cartesian geophone components and the hydrophone or microphone components of a 2‐D or 3‐D multicomponent survey on land, at the sea bottom, acquired as a vertical seismic profile, vertical‐cable, or marine streamer survey. We use a four‐component ocean‐bottom data set for purposes of illustration and example. A primary objective is a consistent system of polarity specifications to facilitate consistent horizon correlation among multicomponent data sets and enable determin

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19

Evans, Jonathan St B. T., John Clibbens, and Anita Harris. "Prior belief and polarity in multicue learning." Quarterly Journal of Experimental Psychology Section A 58, no. 4 (2005): 651–65. http://dx.doi.org/10.1080/02724980443000133.

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We report two experiments in which participants are trained using a multicue probability learning (MCPL) task, which attempts to simulate the acquisition of expert judgement by experience in the real world. Participants were asked to predict performance in certain occupations given a profile of personality test results with trial-by-trial outcome feedback. Only some cues were relevant, and the polarity of the cues (positive or negative predictors) was unspecified. In addition, 25% of random noise was added to the feedback to simulate real world uncertainty. The main factor of interest was that

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20

Polanco, Carlos, Vladimir N. Uversky, Alberto Huberman, et al. "Bioinformatics-based Characterization of the Sequence Variability of Zika Virus Polyprotein and Envelope Protein (E)." Evolutionary Bioinformatics 18 (January 2022): 117693432211307. http://dx.doi.org/10.1177/11769343221130730.

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Background: Zika virus, which is widely spread and infects humans through the bites of Aedes albopictus and Aedes aegypti female mosquitoes, represents a serious global health issue. Objective: The objective of the present study is to computationally characterize Zika virus polyproteins (UniProt Name: PRO_0000443018 [residues 1-3423], PRO_0000445659 [residues 1-3423] and PRO_0000435828 [residues 1-3419]) and their envelope proteins using their physico-chemical properties. Methods: To achieve this, the Polarity Index Method (PIM) profile and the Protein Intrinsic Disorder Predisposition (PIDP)

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González-Pinto, Ana, Susana Alberich, Sara Barbeito, et al. "Different profile of substance abuse in relation to predominant polarity in bipolar disorder." Journal of Affective Disorders 124, no. 3 (2010): 250–55. http://dx.doi.org/10.1016/j.jad.2009.11.005.

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22

Santos, Marli da Silva, Obdulio Gomes Miguel, Carmen Lúcia Oliveira Petkowicz, and Lys Mary Bileski Cândido. "Antioxidant and fatty acid profile of gabiroba seed (Campomanesisa Xanthocarpa Berg)." Food Science and Technology 32, no. 2 (2012): 234–38. http://dx.doi.org/10.1590/s0101-20612012005000045.

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This study aimed to evaluate the antioxidant potential and fatty acid profile of gabiroba (Campomanesia xanthocarpa Berg) seeds. In order to obtain the extract, the seeds were dried, crushed, and subjected to sequential extraction by maceration and percolation in a modified soxhlet extractor using solvent polarity gradient composed of hexane, chloroform, ethyl acetate, and alcohol, respectively. The extraction time was six hours. The ethanol extract showed the highest antioxidant potential, given by the EC50 value and the amount of total phenolic compounds. High amounts of unsaturated fatty ac

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Marczyński, Zbigniew, Marian Mikołaj Zgoda, Andrzej Stańczak, Sławomira Nowak, Jerzy Jambor та Beata Skibska. "Predicted real solubility (– log x2) and the level of hydrophilic-lipophilic balance (HLBRequ.) of phytochemicals contained in extracts isolated from linden inflorescence (Tiliae flos) with solvents of diversified polarity (εM)". Herba Polonica 65, № 3 (2019): 39–50. http://dx.doi.org/10.2478/hepo-2019-0017.

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Summary Introduction: The broad spectrum of pharmacological properties of linden inflorescence extracts results from polarity and the level of hydrophilic-lipophilic balance of solvents (medium) used to separate compatible phytochemical structures with the expected pharmacotherapeutic profile. Objective: The use of the general Hildebrand-Scatchard-Fedors theory of solubility to calculate the predicted solubility of classes of phytochemicals contained in linden inflorescences (Tiliae flos) and the indication of those structures which, due to their high solubility in the medium, are responsible

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Kontogiorgis, Christos, Georgia Eirini Deligiannidou, Vasiliki Karamani, Dimitra Hadjipavlou-Litina, Diamanto Lazari, and Athanasios Papadopoulos. "Antioxidant Profile of Home Prepared Taraxacum Officinale Weber Ex Wigg Beverage." Current Nutraceuticals 1, no. 1 (2020): 64–72. http://dx.doi.org/10.2174/2665978601666200212110603.

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Background: Aromatic plants are quite popular for daily use worldwide. However, little is known about the appropriate preparation of beverages in “house conditions” in order to preserve their beneficial characteristics after processing. Taraxacum officinale Weber ex Wigg contains a variety of compounds, with well-documented effects against oxidative stress. This study aims to investigate the optimum preparation conditions of a Taraxacum beverage in the household setting, with respect to its antioxidant characteristics. Methods: Dried, commercial T. officinale was used to prepare beverages boil

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James, Stacy O., Laziz Bouzidi, R. J. Neil Emery, and Suresh S. Narine. "Lipid Fractionation and Physicochemical Characterization of Carapa guianensis Seed Oil from Guyana." Processes 11, no. 9 (2023): 2565. http://dx.doi.org/10.3390/pr11092565.

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The seed oil of Carapa guianensis, known as crabwood oil (CWO), is distinguished for its medicinal and cosmetics applications, attributed to its bioactive components and lipid profile. CWO and its dry and solvent fractionation were studied, with a focus on physicochemical functionality and the partitioning of known bioactive compounds, such as limonoids and sterols. Important bioactive components, including limonoids and sterols, were partitioned depending on the fractionation method; in particular, there is a direct dependence on solvent polarity. There was a very strong solid fraction yield–

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Elghobashy, Maiar, Stephanie Jenkins, Zachary Shulman, Anne O’Neil, Sofia Kouneli, and Abeer M. Shaaban. "Tall Cell Carcinoma with Reversed Polarity: Case Report of a Rare Special Type of Breast Cancer and Review of the Literature." Biomedicines 11, no. 9 (2023): 2376. http://dx.doi.org/10.3390/biomedicines11092376.

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Background: Tall cell carcinoma of the breast with reversed polarity (TCCRP) is a rare type of invasive breast cancer with overlapping features with papillary thyroid carcinoma and a characteristic molecular profile. Few cases have been reported in the literature since the first case was described in 2003. Case presentation: We present the case of a 41-year-old female with a symptomatic left breast lump. Image-guided core biopsy was diagnosed as triple-negative apocrine carcinoma. Surgical excision revealed an invasive carcinoma with solid papillary pattern, nuclei arranged away from the basem

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Luo, Runbin, and Rui Liu. "Where and How Does a Decay-index Profile Become Saddle-like?" Astrophysical Journal 929, no. 1 (2022): 2. http://dx.doi.org/10.3847/1538-4357/ac5b06.

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Abstract The decay index of solar magnetic fields is known as an important parameter in regulating solar eruptions from the standpoint of the torus instability. In particular, a saddle-like profile of decay index, which hosts a local torus-stable regime at higher altitudes than where the decay index first exceeds the instability threshold, is found to be associated with some confined or two-step eruptions. To understand the occurrence of such a profile, we employed dipoles to emulate different kinds of photospheric flux distributions. Corroborated by observations of representative active regio

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Tlili, Sham, Estelle Gauquelin, Brigitte Li, et al. "Collective cell migration without proliferation: density determines cell velocity and wave velocity." Royal Society Open Science 5, no. 5 (2018): 172421. http://dx.doi.org/10.1098/rsos.172421.

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Collective cell migration contributes to embryogenesis, wound healing and tumour metastasis. Cell monolayer migration experiments help in understanding what determines the movement of cells far from the leading edge. Inhibiting cell proliferation limits cell density increase and prevents jamming; we observe long-duration migration and quantify space–time characteristics of the velocity profile over large length scales and time scales. Velocity waves propagate backwards and their frequency depends only on cell density at the moving front. Both cell average velocity and wave velocity increase li

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Bustamante Martínez, Alexander, Ernesto Amaru Galvis Lista, and Mayda Patricia Gonzalez Zabala. "Research Profile on Data Science in the Field of Tourism." Tourism 72, no. 4 (2024): 673–86. http://dx.doi.org/10.37741/t.72.4.13.

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This research examined trends in data science application within tourism using SCOPUS for bibliographic records and VOSViewer for metadata analysis. It highlighted the top 100 keywords based on their strength. Since 2012, there's been an exponential rise in related publications. There seems to be a link between a nation's economic tourism strength and its research output. Countries like Australia, Italy, and Spain, which are known for tourism, also dominate research contributions. China has led in this domain, consistently upping its publications since 2012. The study identified some key areas

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Teo, Boon Chiat Terence, Wu Cong Lim, Navaneethan Venkadasamy, Xian Yang Lim, Chiang Liang Kok, and Liter Siek. "A CMOS Rectifier with a Wide Dynamic Range Using Switchable Self-Bias Polarity for a Radio Frequency Harvester." Electronics 13, no. 10 (2024): 1953. http://dx.doi.org/10.3390/electronics13101953.

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This paper presents a switchable self-bias polarity on the CMOS complementary cross-coupled rectifier to improve the rectifier’s power conversion efficiency (PCE) profile across a wide input power (PIN) dynamic range. This technique achieves this by adaptively switching the polarity of the bias on the n-MOS to overdrive it during low PIN to improve the sensitivity and underdrive it during high PIN to suppress the shoot-through loss and the unnecessary discharge of the coupling capacitor. The popular self-biased p-MOS is also implemented further to reduce the reverse conduction loss during high

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Falke, Mr Nikhil, Mr Abhishek Kiranrao Dabhade, Miss Ashvini Rangraoji Bansod, Mr Nirmal Sureshkumar Bajaj, Mr Chaitanya Harish Tayade, and Prof Y. R. Shelokar. "Implementation of Online Mess Recommender System using Sentiment Analysis." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (2023): 3441–45. http://dx.doi.org/10.22214/ijraset.2023.52021.

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Abstract: In this research paper we proposed mess recommender system using sentiment analysis. We proposed Wordnet based sentiment analysis. Users will submit ratings and reviews for mess as per their experience; our model will analyse the submitted reviews and find out the polarity of the review. Based on these reviews and ratings, user profile like city, area, likings etc. our proposed system will recommend appropriate messes to the user.

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Sexton, John L., and Harvey Henson Jr. "Interpretation of seismic reflection and gravity profile data in western Lake Superior." Canadian Journal of Earth Sciences 31, no. 4 (1994): 652–60. http://dx.doi.org/10.1139/e94-058.

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The interpretation of 1047 km of seismic reflection data collected in western Lake Superior is presented along with reflection traveltime contour maps and gravity models to understand the overall geometry of the Midcontinent Rift System beneath the lake. The Douglas, Isle Royale, and Keweenaw fault zones, clearly imaged on the seismic profiles, are interpreted to be large offset detachment faults associated with initial rifting. These faults have been reactivated as reverse faults with 3–5 km of throw. The Douglas Fault Zone is not directly connected with the Isle Royale Fault Zone. The seismi

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Murthy, Jamuna S., G. M. Siddesh, and K. G. Srinivasa. "TwitSenti: A Real-Time Twitter Sentiment Analysis and Visualization Framework." Journal of Information & Knowledge Management 18, no. 02 (2019): 1950013. http://dx.doi.org/10.1142/s0219649219500138.

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Twitter is considered as one of the world’s largest social networking sites which allow users to customize their public profile, connect with others and interact with connected users. The proposed work introduces a distributed real-time twitter sentiment analysis and visualization framework by implementing novel algorithms for twitter sentiment analysis called Emotion-Polarity-SentiWordNet. The framework is applied to build an interactive web application called “TwitSenti” which can benefit companies and other organizations in knowing the people’s sentiment towards the aspects such as brands,

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Jones, Mathew J., Ricardo Callejo, Alexandra M. Z. Slawin, Michael Bühl, and David O'Hagan. "Organofluorine chemistry: Difluoromethylene motifs spaced 1,3 to each other imparts facial polarity to a cyclohexane ring." Beilstein Journal of Organic Chemistry 12 (December 22, 2016): 2823–27. http://dx.doi.org/10.3762/bjoc.12.281.

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2,2-Dimethyl-5-phenyl-1,1,3,3-tetrafluororocyclohexane has been prepared and characterised as an example of a facially polarised cyclohexane containing 1,3 related CF2 groups. The dipolar nature of the ring arises from the axial orientation of two of the C–F bonds pointing in the same direction, and set by the chair conformation of the cyclohexane. This electrostatic profile is revealed experimentally both in the solid-state (X-ray) packing of the rings and by solution (NMR) in different solvents. A computationally derived electrostatic profile of this compound is consistent with a more electr

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Salim, Mohammad Fajar Hadi, I. Made Arie Dharma Putra Nugraha, Farah Adilla, and Luh Pratiwi Diva Yanti. "Chromatography Profiles of Terpenoid Compounds in The Extract of Sambiloto (Andrographis paniculata) Herb from Various Solvents." Walisongo Journal of Chemistry 4, no. 2 (2021): 74–80. http://dx.doi.org/10.21580/wjc.v4i2.7783.

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Sambiloto (Andrographis paniculata) is widely used as a medicinal plant for Indonesians. The content of extracted bioactive compounds is affected by the polarity of the extraction solvent. This study aims to determine the effect of extraction solvent on the chromatographic profile of Sambiloto herb, especially terpenoid group using the TLC-Spectrophotodensitometry method. Sambiloto herb was extracted by sonication method using methanol, ethanol, ethyl acetate, and chloroform as the solvents. Chromatographic profiles were identified by stationary phase of TLC silica gel GF254 plate and a mobile

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Zebua, Nilsya Febrika, Nerdy Nerdy, Abdi Wira Septama, Des Suryani, Shadiq Suwailim, and Refi Bahrianur. "ANTIOXIDANT ACTIVITY TEST AND INFRARED PROFILE OF HEXANE, EHYL ACETATE, AND ETHANOL EXTRACT OF BREADFRUIT LEAVES (Artocarpus altilis)." RASAYAN Journal of Chemistry 18, no. 01 (2025): 197–205. https://doi.org/10.31788/rjc.2025.1819121.

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The emergence of various degenerative diseases caused by highly active and dangerous chemical compounds known as free radicals requires the use of antioxidants to inhibit oxidation reactions and prevent cell damage by binding free radicals and highly reactive molecules. Breadfruit (Artocarpus altilis) leaves are rich in phytochemical secondary metabolites. This study aimed to determine the antioxidant activity and correlate the functional group obtained by infrared profile in the hexane, ethyl acetate, and ethanol extracts of breadfruit leaves with variations in solvent polarity. This study wa

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Daft, Christopher M. W. "Microfabricated ultrasonic transducers with bias polarity beam profile control and method of operating the same." Journal of the Acoustical Society of America 121, no. 2 (2007): 678. http://dx.doi.org/10.1121/1.2640097.

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Ostwaldt, Jan-Erik, Christoph Hirschhäuser, Stefan K. Maier, Carsten Schmuck, and Jochen Niemeyer. "Supramolecular polymers with reversed viscosity/temperature profile for application in motor oils." Beilstein Journal of Organic Chemistry 17 (January 12, 2021): 105–14. http://dx.doi.org/10.3762/bjoc.17.11.

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We report novel supramolecular polymers, which possess a reversed viscosity/temperature profile. To this end, we developed a series of ditopic monomers featuring two self-complementary binding sites, either the guanidiniocarbonyl pyrrole carboxylic acid (GCP) or the aminopyridine carbonyl pyrrole carboxylic acid (ACP). At low temperatures, small cyclic structures are formed. However, at elevated temperatures, a ring–chain transformation leads to the formation of a supramolecular polymer. We demonstrate that this effect is dependent on the concentration of the solution and on the polarity of th

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Zidny, Robby, Dirayati Yusrina, Intan Aryoningtyas, et al. "UJI KELAYAKAN KIT PRAKTIKUM PENGUJIAN KEPOLARAN SENYAWA DARI MATERIAL SEDERHANA." JRPK: Jurnal Riset Pendidikan Kimia 7, no. 1 (2017): 52–58. http://dx.doi.org/10.21009/jrpk.071.08.

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This study aims to validate the feasibility of chemistry lab kit made from simple materials on the concept of chemical compounds polarity for high school students in remote areas. Educational research and development model includes needs assessment, product design, expert validity test and limited scale test used in this research. The research instrument used in the form of a questionnaire aimed to test the validity of experts analyzed using Likert scale. A limited scale test conducted on 20 students of 10th grade SMA Negeri 1 Pamarayan Serang to find out the feasibility and practical aspects

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Zhang, Jingyi, Bin Jiang, Zhiheng Wang, et al. "Molecular characterisation of ambient aerosols by sequential solvent extractions and high-resolution mass spectrometry." Environmental Chemistry 15, no. 3 (2018): 150. http://dx.doi.org/10.1071/en17197.

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Environmental contextOrganic compounds generally make a large contribution to ambient aerosol fine particles, and can influence atmospheric chemistry. Solvent extraction before mass spectrometry is widely used for the determination of organic compounds in aerosols, but the molecular selectivity of different solvents is unclear. We extracted an aerosol sample with various solvents and show how the organic compound profile obtained by mass spectrometry changes depending on the extracting solvent. AbstractFor a comprehensive characterisation of organic compounds in aerosols, samples collected on

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Hamburger, Matthias, Georg-Ulrich Rüster, and Matthias F. Melzig. "HPLC Based Activity Profiling for Inhibitors of Human Neutrophil Elastase in Isatis tinctoria Leaf Extracts." Natural Product Communications 1, no. 12 (2006): 1934578X0600101. http://dx.doi.org/10.1177/1934578x0600101207.

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In continuation of our search for anti-inflammatory constituents in lipophilic extracts of Isatis tinctoria, an HPLC-based profiling for inhibitors of human neutrophil elastase was performed. Using a linear gradient profile, fractions with significant activity (>50%) appeared in the second half of the chromatogram and corresponded to moderately to highly lipophilic constituents. The active fractions of intermediate polarity were further analyzed by HPLC, TLC and GC. They contained mainly α-linolenic, linoleic, cis-11-octadecenoic acid, oleic and palmitic acids.

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Wigbers, Manon C., Fridtjof Brauns, Ching Yee Leung, and Erwin Frey. "Flow Induced Symmetry Breaking in a Conceptual Polarity Model." Cells 9, no. 6 (2020): 1524. http://dx.doi.org/10.3390/cells9061524.

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Important cellular processes, such as cell motility and cell division, are coordinated by cell polarity, which is determined by the non-uniform distribution of certain proteins. Such protein patterns form via an interplay of protein reactions and protein transport. Since Turing’s seminal work, the formation of protein patterns resulting from the interplay between reactions and diffusive transport has been widely studied. Over the last few years, increasing evidence shows that also advective transport, resulting from cytosolic and cortical flows, is present in many cells. However, it remains un

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Zuckerman, Sean T., Edgardo Rivera-Delgado, Rebecca M. Haley, Julius N. Korley, and Horst A. von Recum. "Elucidating the Structure-Function Relationship of Solvent and Cross-Linker on Affinity-Based Release from Cyclodextrin Hydrogels." Gels 6, no. 1 (2020): 9. http://dx.doi.org/10.3390/gels6010009.

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Minocycline (MNC) is a tetracycline antibiotic capable of associating with cyclodextrin (CD), and it is a frontline drug for many instances of implant infection. Due to its broad-spectrum activity and long half-life, MNC represents an ideal drug for localized delivery; however, classic polymer formulations, particularly hydrogels, result in biphasic release less suitable for sustained anti-microbial action. A polymer delivery system capable of sustained, steady drug delivery rates poses an attractive target to maximize the antimicrobial activity of MNC. Here, we formed insoluble hydrogels of p

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Ishida, Naoyuki. "A Simultaneous Analytical Method to Profile Non-Volatile Components with Low Polarity Elucidating Differences Between Tobacco Leaves Using Atmospheric Pressure Chemical Ionization Mass Spectrometry Detection." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 27, no. 2 (2016): 60–74. http://dx.doi.org/10.1515/cttr-2016-0009.

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Summary A comprehensive analytical method using liquid chromatography atmospheric pressure chemical ionization mass spectrometry detector (LC/APCI-MSD) was developed to determine key non-volatile components with low polarity elucidating holistic difference among tobacco leaves. Nonaqueous reversed-phase chromatography (NARPC) using organic solvent ensured simultaneous separation of various components with low polarity in tobacco resin. Application of full-scan mode to APCI-MSD hyphenated with NARPC enabled simultaneous detection of numerous intense product ions given by APCI interface. Paramet

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Goulty, N. R., M. Leggett, T. Douglas, and C. H. Emeleus. "Seismic reflection test on the granite of the Skye Tertiary igneous centre." Geological Magazine 129, no. 5 (1992): 633–36. http://dx.doi.org/10.1017/s0016756800021804.

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AbstractWe have conducted a seismic reflection test over a short profile on the granite of the Skye Tertiary central intrusive complex. From previous gravity modelling work it had been inferred that the granite is approximately 1.5 km thick and overlies basic rocks. The seismic data indicate that the granite is at least 2 km thick at the test location. Reflection events of alternating polarity between depths of 2.1 and 2.4 km suggest that basic and acidic sheets are interlayered at the base of the granitic mass.

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He, Zhanglan, Kangzhuo Yang, Zhipeng Liu, et al. "Tandem Solid-Phase Extraction Columns for Simultaneous Aroma Extraction and Fractionation of Wuliangye and Other Baijiu." Molecules 26, no. 19 (2021): 6030. http://dx.doi.org/10.3390/molecules26196030.

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Wuliangye baijiu is one of the most famous baijiu in China, with a rich, harmonic aroma profile highly appreciated by consumers. Thousands of volatiles have been identified for the unique aroma profile. Among them, fatty acid esters have been identified as the main contributors to the aroma profile. In addition, many non-ester minor compounds, many of which are more polar than the esters, have been identified to contribute to the characteristic aroma unique to Wuliangye baijiu. The analysis of these minor compounds has been challenging due to the dominance of esters in the sample. Thus, it is

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Cano-Lamadrid, Marina, Manuel Viuda-Martos, José Miguel García-Garví, Jesús Clemente-Villalba, Ángel A. Carbonell-Barrachina, and Esther Sendra. "Polyphenolic Profile and Antimicrobial Potential of Peel Extracts Obtained from Organic Pomegranate (Punica granatum L.) Variety “Mollar De Elche”." Acta Horticulturae et Regiotecturae 23, no. 1 (2020): 1–4. http://dx.doi.org/10.2478/ahr-2020-0001.

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AbstractThe aim of this work was to determine the polyphenolic profile and the antibacterial properties of extracts from organic pomegranate peel, to evaluate if it could be used as a potential antimicrobial ingredient to elaborated organic food. The antibacterial properties of different organic pomegranate peel extracts (ethyl acetate, acetone and methanol, with an increasing polarity) were tested against: Listeria innocua, Achromobacter denitrificans and Algaligenes faecalis. All extracts showed antimicrobial activity against all bacteria tested except ethyl acetate extract against A. denitr

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BHARTI, ANU, JYOTI BABU DHAR, and TEJ KRISHAN BHAT. "The content, profile and biological activity of tannins in some tanniniferous plants." Journal of Medicinal and Aromatic Plant Sciences 37, no. 3 (2015): 46–51. http://dx.doi.org/10.62029/jmaps.v37i3.bharti.

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The present study was carried out on the quantification, chromatographic profiling and biological activity assessments of selected tanniniferous forages viz. leaves of oak/ban (Quercus leucotrichophora), robinia (Robinia pseudoacacia), khirk (Celtisaustralis), kachnar (Bauhinia variegata), siris (Albizia lebbeck), pakar (Ficus infectoria), tremal (Ficus roxburghii) and buince (Salix alba), and leaves and fruits of bhera (Terminalia bellerica) and harad (Terminalia chebula). The total tannin content was found high in harad and bhera fruits & leaves. Kachnar, robinia and pakar leaves were ri

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Oguchi, S., W. A. Walker, and I. R. Sanderson. "Insulin-like Growth Factor Binding Protein Profile Secreted by Human Intestinal Epithelial Cells Varies with Polarity." Biochemical and Biophysical Research Communications 196, no. 2 (1993): 789–93. http://dx.doi.org/10.1006/bbrc.1993.2318.

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Hamciuc, Elena, Mihaela Homocianu, Corneliu Hamciuc, and Ionela-Daniela Carja. "Synthesis and photophysical study of new blue fluorescent poly(azomethine-1,3,4-oxadiazole)s containing dimethylamino groups." High Performance Polymers 30, no. 3 (2017): 339–46. http://dx.doi.org/10.1177/0954008317697367.

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New aromatic polyazomethines were synthesized by polycondensation reaction of a diamine containing 1,3,4-oxadiazole ring, namely, 4,4′-diamino-4″-[2-(4-phenoxy)-5-(4-dimethylaminophenyl)-1,3,4-oxadiazole)]triphenylmethane, with terephthalic aldehyde or bis(4-formylphenoxyphenyl)fluorene, by using N-methyl-2-pyrrolidinone (NMP) as solvent. The polymers were easily soluble in polar solvents, such as NMP, N, N-dimethylacetamide, or chloroform, and showed high thermal stability with the initial decomposition temperature above 415°C and the temperature of 10% weight loss in the range of 450–460°C.

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