Log in

Relevant bibliographies by topics / Solvent chloroform / Journal articles

To see the other types of publications on this topic, follow the link: Solvent chloroform.

Journal articles on the topic 'Solvent chloroform'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Solvent chloroform.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Saraswati, Sagung Ayu Bulan Julia, Luh Putu Wrasiati, and Ni Made Wartini. "KARAKTERISTIK PEWARNA ALAMI DARI EKSTRAK KULIT BUAH JERUK MANDARIN (Citrus reticulata) PADA PERBANDINGAN PELARUT ETANOL DAN KLOROFORM." JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI 6, no. 4 (2018): 278. http://dx.doi.org/10.24843/jrma.2018.v06.i04.p02.

Full text

Abstract:

Orange fruit who be the superior commodity is known as a fruit who rich of its vitamin C. One kind of orange who really liked by the society is Mandarin Orange (Citrus reticulata) that comes from China. The aims of this research were to know the effect of ethanol and chloroform solvent ratio to the characteristic of the natural colorant from Mandarin orange peel extract and determine the best ethanol and chloroform solvent ratio which produced Mandarin orange peel extract as natural colorant. Experimental design in this research used Randomized Block Design by using the comparison of ethanol a

APA, Harvard, Vancouver, ISO, and other styles

2

Shephard, J. J., A. K. Soper, S. K. Callear, S. Imberti, J. S. O. Evans, and C. G. Salzmann. "Polar stacking of molecules in liquid chloroform." Chemical Communications 51, no. 23 (2015): 4770–73. http://dx.doi.org/10.1039/c4cc09235j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Smith, John F., and Loren G. Hepler. "Examination of the inert solvent assumption in the ideal associated solution model. Enthalpy of chloroform–triethylamine complex dissociation." Canadian Journal of Chemistry 67, no. 7 (1989): 1153–57. http://dx.doi.org/10.1139/v89-174.

Full text

Abstract:

We have made new measurements of the enthalpies of adding cyclohexane to mixtures of chloroform + triethylamine + cyclohexane at 25 °C. The results of these measurements have been analysed in terms of the ideal associated solution model to obtain ΔHθ for the dissociation of the chloroform-triethylamine complex. Our value of ΔHθ is in excellent agreement with a published value that was obtained from results of measurements on binary mixtures of chloroform + triethylamine. This agreement indicates that it is usefully accurate to treat mixtures of chloroform + triethylamine + cyclohexane as ideal

APA, Harvard, Vancouver, ISO, and other styles

4

Bayram, Emre, Dilek Dalat, and Melike Bayram. "Solubility Evaluation of Different Root Canal Sealing Materials." Journal of Contemporary Dental Practice 16, no. 2 (2015): 96–100. http://dx.doi.org/10.5005/jp-journals-10024-1643.

Full text

Abstract:

ABSTRACT Aim To evaluate the solubility of five different root canal sealers (AH Plus Jet, RealSeal SE, MTA Fillapex, Tubli-Seal, and Acroseal) in chloroform, eucalyptol and Endosolv-E solvents. Materials and methods Ninety root canal sealer samples were prepared and then divided into three groups for immersion in a solvent for 2, 5 or 10 minutes. The mean values of the root canal sealers’ dissolution in the solvents were obtained by the difference between the preimmersion original weight and the post-immersion weight on a digital analytical scale. Data were statistically analyzed by a Kruskal

APA, Harvard, Vancouver, ISO, and other styles

5

Bosits, Miklós Hunor, Emese Pálovics, János Madarász, and Elemér Fogassy. "New Discoveries in Enantiomeric Separation of Racemic Tofisopam." Journal of Chemistry 2019 (April 7, 2019): 1–10. http://dx.doi.org/10.1155/2019/4980792.

Full text

Abstract:

Resolution process of tofisopam has been re-evaluated now based on our new investigations. Originally, it was carried out in the water-chloroform system, where the intermediate salt of high diastereomeric excess was described as (R)-TOF·(R,R)-DBTA·(H2O)3. Opposed to previous assumptions, we have actually found that a different solvate composition, (R)-TOF‐(R,R)-DBTA-CHCl3, forms with chloroform, in which molecules of CHCl3 are captured and held with different strengths. Moreover, resolution of TOF with (R,R)-DBTA is possible (and favourable) in water-free solvent and solvent mixture. However,

APA, Harvard, Vancouver, ISO, and other styles

6

Jednačak, Tomislav, Maja Majerić Elenkov, Tomica Hrenar, Karlo Sović, Jelena Parlov Vuković, and Predrag Novak. "Solution and solid state studies of hydrogen bonding in substituted oxazolidinones by spectroscopic and quantum chemical methods." New Journal of Chemistry 44, no. 16 (2020): 6456–63. http://dx.doi.org/10.1039/c9nj06349h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Udaya Prakash N K, Sriraman V, Devika V, et al. "Comparative studies on phytochemistry, antioxidant and antibacterial activity of direct and sequential extracts of chromolaena odorata leaves." International Journal of Research in Pharmaceutical Sciences 10, no. 2 (2019): 914–21. http://dx.doi.org/10.26452/ijrps.v10i2.275.

Full text

Abstract:

Phytochemistry, antioxidant and antibacterial activities of different solvent extracts of Chromolaena odorata leaves obtained by direct and sequential extraction were compared in this study. Antibacterial evaluation of the extracts was performed through a disc diffusion method. The results revealed that the solvents, Petroleum ether and Ethyl acetate showed the presence of a majority of the phytochemicals, Chloroform extract yielded maximum TPC and TAA and ethyl acetate yielded higher TFC when compared to other solvents. Ethanol and chloroform extracts showed lower concentrations of IC50 again

APA, Harvard, Vancouver, ISO, and other styles

8

Dewi, Kurnia Harlina, Markom Masturah, and Wan Ramli Wan Daud. "Parameter Optimization in the Extraction of Sea Cucumber (Holothuria scabra j) as a Source of Testosterone." Advanced Materials Research 233-235 (May 2011): 1358–65. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1358.

Full text

Abstract:

Testosterone, the steroid hormone used in sex reversal and as an aphrodisiac, is produced not only by sea cucumber, but many other organisms too. This research was aimed at optimizing conventional extraction of testosterone from sea cucumber, looking at method, type of solvent, solvent ratio, and temperature for isolation. The results showed that extraction by reflux produced the highest testosterone content, followed by soxhlet extraction. The lowest yield was produced by maceration extraction. The solvents selected were acetone, methanol, methanol/chloroform mixture (1:2) and chloroform. The

APA, Harvard, Vancouver, ISO, and other styles

9

Satheesh, Arjun, A. A. Alagiriswamy, S. Devanand, and S. Nithiyanantham. "Solvent Assisted Coaxial-Electrospun Poly Methyl Methacrylate Polymer and Study of Resultant Fibers." Sensor Letters 18, no. 12 (2020): 905–9. http://dx.doi.org/10.1166/sl.2020.4296.

Full text

Abstract:

Electrospinning of dispersions with higher viscosity and limited flow may be carried out, based on the solvent assisted coaxial technique, where the flow of the core dispersion is supported by a free flowing sheath solvent. In the present work, the sheath solvents used are chloroform, toluene and dimethyl formamide and we discuss the fiber formation of Poly Methyl Methacrylate (PMMA) (dispersion-25 wt%). PMMA dispersed in chloroform is taken as the core solution and the sheath is pure solvent. The In-Situ effect of different sheath solvents in fiber formation at two different tip to collector

APA, Harvard, Vancouver, ISO, and other styles

10

Lee, Chong M., Belzahet Trevino, and Mayuree Chaiyawat. "A Simple and Rapid Solvent ExtractionMethod for Determining Total Lipids in Fish Tissue." Journal of AOAC INTERNATIONAL 79, no. 2 (1996): 487–92. http://dx.doi.org/10.1093/jaoac/79.2.487.

Full text

Abstract:

Abstract Solvent systems that have been developed for lipid extraction include chloroform–methanol, n-hexane– isopropyl alcohol, and methylene chloride–metha nol. The extraction methods are labor intensive, lack precision, or require a large volume of solvent. Correct computation of lipid content calls for full recovery of solvent after extraction, but recovery always is incomplete because of unaccounted solvent residue that remains in jar, filter paper, and homogenized tissue. A rapid and simple extraction method coupled with correct computation was developed for determining total lipids in f

APA, Harvard, Vancouver, ISO, and other styles

11

Exner, Thomas, George Papadopoulos, Nilgun Sahman, and Jerry Koutts. "Solvent Extraction of Test Plasmas for Improved Recovery of Lupus Anticoagulant Activity." Thrombosis and Haemostasis 64, no. 01 (1990): 121–23. http://dx.doi.org/10.1055/s-0038-1647266.

Full text

Abstract:

SummaryPhospholipid procoagulant material mainly derived from platelets interferes or “bypasses” the more specific tests for lupus anticoagulants. Such material in test plasmas can be inactivated with recovery of lupus anticoagulant activity by simple extraction with chloroform. This solvent treatment damages mainly factors VIII, V, VII and IX. Ether and various other solvents were less damaging to these clotting factors but not quite as effective as chloroform in the recovery of lupus anticoagulant activity.

APA, Harvard, Vancouver, ISO, and other styles

12

Oyama, Kazumi Onaga Nagayama, Evandro Luiz Siqueira, and Marcelo dos Santos. "In vitro study of effect of solvent on root canal retreatment." Brazilian Dental Journal 13, no. 3 (2002): 208–11. http://dx.doi.org/10.1590/s0103-64402002000300014.

Full text

Abstract:

The aim of this study was to assess the effectiveness of five different solvents: xylol, eucalyptol, halothane, chloroform and orange oil on softening gutta-percha in simulated root canals. One drop of solvent was placed into a reservoir made in a simulated canal whose channel was previously instrumented and filled with gutta-percha and N-Rickert sealer. After 5 min, softening was evaluated for each solvent by the penetration of a spreader while applying force with a 442 Instron apparatus to reach a depth of 5 mm. The results were analyzed statistically by the Kruskal-Wallis test. Xylol and or

APA, Harvard, Vancouver, ISO, and other styles

13

Escobar, Karol Fuentes, Julián Olivera Bonilla, and Adela Rodríguez Chaparro. "Extracción de aceite a partir de microalgas obtenidas de la laguna El Estanco, en San Andrés de sotavento - Colombia." KnE Engineering 3, no. 1 (2018): 11. http://dx.doi.org/10.18502/keg.v3i1.1408.

Full text

Abstract:

The objective of this research is to extract oil from the microalgae obtained in the lagoon El Estanco, located in San Andrés de Sotavento, Colombia, using the modified Bligh & Dyer method, with two types of solvents For chloroform + methanol and hexane. The results obtained with solvent extraction chloroform + methanol provided the largest volume of extracted oil, a comparison with hexane.Keywords: Oil, Extraction, Microalgae.

APA, Harvard, Vancouver, ISO, and other styles

14

Ahmed, Reem, Chandra Mohan Sinnathambi, and Usama Eldmerdash. "N-Hexane, Methyl Ethyl Ketone and Chloroform Solvents for Oil Recovery from Refinery Waste." Applied Mechanics and Materials 699 (November 2014): 666–71. http://dx.doi.org/10.4028/www.scientific.net/amm.699.666.

Full text

Abstract:

Considerable amount of oily waste is generated from petroleum refinery in Malaysia. A typical refinery produces about 40 tons of sludge per month. Disposing via land filling (common method) is becoming less accepted and more expensive. As a result, refineries and other facilities have accumulated large volumes of this waste in makeshift landfills or other storage areas. For this reason solvent extraction method has been selected for oil recovery and to minimize the solid waste. Three solvents (chloroform, MEK, and n-hexane) and two extraction methods (sludge–solvent mixing method , and Soxhlet

APA, Harvard, Vancouver, ISO, and other styles

15

Kadim, Akeel M. "Colloidal Synthesis of CdSe Nanocrystals: Preparation, Characterization in Different Organic Solvent." Nano Hybrids and Composites 29 (June 2020): 1–7. http://dx.doi.org/10.4028/www.scientific.net/nhc.29.1.

Full text

Abstract:

Colloidal CdSe Nanocrystals (NCs) or quantum dots (QDs) have been developed using a yielding solution technique utilizing chemical reactions in chloroform and oleic acid in different organic solvents. This assembly is an improvement of the systematic thermal decomposition of high temperature organic solvent compounds. CdSe NCs of specific sizes can be produced easily by adjusting the solvent. This technique is reproducible and clear, so industrial development can be easily scaled up. Characterization at room temperature of the UV-Vis absorption and Photoluminescence (PL) spectra. Results revea

APA, Harvard, Vancouver, ISO, and other styles

16

Masruroh, D. J. D. H. Djoko, Lalu A. Didik, et al. "Solvent Effect on Morphology of Polystyrene Coating and their Role to Improvement for Biomolecule Immobilization in Application of QCM Based Biosensor." Applied Mechanics and Materials 530-531 (February 2014): 54–57. http://dx.doi.org/10.4028/www.scientific.net/amm.530-531.54.

Full text

Abstract:

This research is focused on the synthesis of a polystiren layer for biosensors based on a Quartz Crystal Microbalance sensor (QCM) to immobilize the biomolecule. The polystyrene thin film was deposited by means of spin coating method with various solvents, such as chloroform, toluene, xylene, and tetrahydrofuran (THF), containing a 3% polystyrene solution by mass. The morphologies of the polystyrene layers were observed via SEM/EDx. The polystyrene surface coated using chloroform as the solvent has a rougher morphology and the largest diameter pores compared with the other solvents. The result

APA, Harvard, Vancouver, ISO, and other styles

17

ELENA, CHIȚANU, BĂRA ADELA, BANCIU CRISTINA, LUNGULESCU MARIUS, and MARINESCU VIRGIL. "Study of electrospun cellulose acetate fibers." Industria Textila 69, no. 05 (2018): 363–68. http://dx.doi.org/10.35530/it.069.05.1511.

Full text

Abstract:

The objective of this work was the preparation of cellulose acetate nanofibers by electrospinning using a mixture of solvents. Cellulose acetate solutions were electrospun from binary and ternary solvent systems, such as N,N-dimethylformamide, acetone and chloroform. The effects of the solvent systems on the structural, morphological and mechanical characteristics of the fibers were investigated.

APA, Harvard, Vancouver, ISO, and other styles

18

Tai, Jing Lei, Guang Xue Chen, Qi Feng Chen, and Bao Lin Tang. "Research on Poly Lactic Acid Solvent Coated Paper." Applied Mechanics and Materials 200 (October 2012): 380–84. http://dx.doi.org/10.4028/www.scientific.net/amm.200.380.

Full text

Abstract:

This paper draws on a roll coating method which used for the production of coated paper. Polylactide coating cardboard was prepared through the solvent coating, and study its packaging performance. In this study, chloroform is based solvent, ethanol or n-propanol as auxiliary solvents, poly (ethylene glycol) or poly caprolactone as plasticizer, and the water vapor permeability, oxygen permeability and heat sealability of polylactic acid coated cardboard.

APA, Harvard, Vancouver, ISO, and other styles

19

Mahlinda, Mahlinda, and Fitriana Djafar. "Pengaruh Jenis Co-Solvent terhadap Rendemen dan Mutu Biodiesel secara Transesterifikasi In Situ Menggunakan Radiasi Gelombang Mikro." Jurnal Riset Teknologi Industri 10, no. 2 (2016): 119–26. http://dx.doi.org/10.26578/jrti.v10i2.2563.

Full text

Abstract:

The main purpose of this research was to observer effect co-solvent type (n-Hexane, chloroform and without co-solvent) toward yield and quality of biodiesel via in situ transesterification process using microwave irradiation. The process was studied at microwave power 450 watt, reaction time 4 minutes, methanol to seed ratio 25:1 and catalyst concentration 5%. The physicochemical parameters of the biodiesel produced such as viscosity, density and acid value were analysed and compared with the SNI 7182-2012 standard. The experimental result showed the maximum yield biodiesel 78,32% obtained by

APA, Harvard, Vancouver, ISO, and other styles

20

Nguyen, Linh Vu Viet, and Phu Dai Huynh. "Controlling the morphology of polycaprolactone microparticles produced by electrospraying." Science and Technology Development Journal - Natural Sciences 1, T4 (2017): 130–37. http://dx.doi.org/10.32508/stdjns.v1it4.477.

Full text

Abstract:

Electrospraying is an effective method to produce polycaprolactone microparticles for drug or protein carrier application. In this study, some factors which influenced the morphology of polycaprolactone (PCL) particles were investigated by Scanning Electron Microscopy (SEM), such as polymer concentration, solvent and distance from tip to the collector. The SEM micrographs indicated that the low concentration (1 %) of PCL solution created in wrinkled and hollow semi-spheres while wrinkled spheres were formed by using higher polymer concentration (4 %). The spherical morphology was obtained when

APA, Harvard, Vancouver, ISO, and other styles

21

Kulińska, K., and M. Wiewiórowski. "A comparative study on the dynamics of epimeric 1-hydroxymethyl quinolizidines: II. The solvent and concentration dependence of the association properties." Canadian Journal of Chemistry 66, no. 9 (1988): 2166–71. http://dx.doi.org/10.1139/v88-344.

Full text

Abstract:

The homo and heteroassociation patterns of lupinine and epilupinine in different solvents and at various concentrations have been studied. In n-hexane, n-heptane, CCl4, and C2H4Cl2 solvents, lupinine monomers with an intramolecular OH … N hydrogen bond dominate over homoassociates with an OH … O′ intermolecular hydrogen bond even in concentrated solutions. Homoassociation of lupinine by intermolecular OH … N′ hydrogen bonding is observed only in saturated solutions. In chloroform solution any intermolecular homoassociation is effectively blocked because of significant affinity of chloroform mo

APA, Harvard, Vancouver, ISO, and other styles

22

Vajrabhaya, La-ongthong, Suwanna K. Suwannawong, Roongrawee Kamolroongwarakul, and Lalita Pewklieng. "Cytotoxicity evaluation of gutta-percha solvents: Chloroform and GP-Solvent (limonene)." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 98, no. 6 (2004): 756–59. http://dx.doi.org/10.1016/j.tripleo.2004.05.002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Dobush, Gloria R., C. Davison Ankney, and David G. Krementz. "The effect of apparatus, extraction time, and solvent type on lipid extractions of snow geese." Canadian Journal of Zoology 63, no. 8 (1985): 1917–20. http://dx.doi.org/10.1139/z85-285.

Full text

Abstract:

Variability in apparatus, solvent type, and extraction time for lipid extractions is common in the literature. To investigate the effect of this methodological variability on the amount and type of material extracted, equal subsamples of snow goose (Chen caerulescens) homogenate were extracted in Soxhlet and Goldfisch fat extractors with petroleum ether, diethyl ether, chloroform–methanol, and a petroleum ether–chloroform–methanol mixture for 3, 6, 12, and 24 h. The type of solvent used had the largest effect on the amount of material that was extracted. Petroleum ether and diethyl ether extra

APA, Harvard, Vancouver, ISO, and other styles

24

Karuppiah Pillai, Manoharan. "Evaluation of the Extracts From Rhizomes of Polygonum bistorta for the Median Lethal Dosages in Swiss Albino Mice." Iranian Journal of Toxicology 15, no. 3 (2021): 135–42. http://dx.doi.org/10.32598/ijt.15.3.716.1.

Full text

Abstract:

Background: Polygonum bistorta has been used as a remedy for jaundice, smallpox, pimples, measles, cholera, diarrhoea, dysentery, expelling worms, insect stings and snakebites. In this study, the crude extract from P. bistorta and two fractions viz. hexane and chloroform obtained from the crude extract were studied for their median Lethal Dosages (LD50) in Swiss albino mice. Methods: Powdered rhizomes of P. bistorta was macerated with chloroform and the crude extract was dissolved in a solvent mixture of methanol/water (95:5). The mixture was then subjected to solvent-solvent partition, first

APA, Harvard, Vancouver, ISO, and other styles

25

Rosentreter, Jeffrey J., John Malamakal, Kelli Barnes, and Matt Alexander. "Solvent selection for fatty acid residue analysis of archeologicial artifacts." Sample Preparation 3, no. 1 (2017): 1–10. http://dx.doi.org/10.1515/sampre-2017-0001.

Full text

Abstract:

AbstractResidue analysis has rapidly become one of the most useful techniques for determining an artifact function and revealing insight into paleodiets. The success of analytical residue analysis often lies with the first preparatory step, where the residue is extracted from the object. Detection of a residue requires effective solvation of the material, and there is a large range of potential solvents. One purpose of this study is to determine the efficiency of various solvents for the extraction of fatty acids from charcoal, a material that is ubiquitous, easily identified, remarkably stabl

APA, Harvard, Vancouver, ISO, and other styles

26

Wilcox, Lisa R. "Thermafil retreatment with and without chloroform solvent." Journal of Endodontics 19, no. 11 (1993): 563–66. http://dx.doi.org/10.1016/s0099-2399(06)81287-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Wilcox, Lisa R. "Endodontic retreatment with halothane versus chloroform solvent." Journal of Endodontics 21, no. 6 (1995): 305–7. http://dx.doi.org/10.1016/s0099-2399(06)81006-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Khan, Farhan Raza, Kiran Rehman, and Nadia Aman. "Comparison of Orange Oil and Chloroform as Gutta- Percha Solvents in Endodontic Retreatment." Journal of Contemporary Dental Practice 14, no. 3 (2013): 478–82. http://dx.doi.org/10.5005/jp-journals-10024-1348.

Full text

Abstract:

ABSTRACT Objective To compare the efficacy of gutta-percha removal achieved with simple mechanical technique using two different solvents. Materials and methods It was an in vitro experimental study conducted at the Aga Khan University Hospital, Karachi, Pakistan on 27 extracted human molars divided into two groups by alternate sampling technique. The teeth were prepared by manual filing and obturated with gutta-percha and calcium hydroxide sealer. Two drops of the assigned solvent were placed on the orifice of the obturated canal and Gates Glidden drills #1, 2 and 3 were used for removal of c

APA, Harvard, Vancouver, ISO, and other styles

29

Lan, Tian, Zi Qiang Shao, Wen Jun Wang, et al. "Electrospun Cellulose Triacetate Fibers Using DMSO/Chloroform Co-Solvent System." Advanced Materials Research 924 (April 2014): 73–78. http://dx.doi.org/10.4028/www.scientific.net/amr.924.73.

Full text

Abstract:

Nonwoven fibers of cellulose triacetate (CTA) were continuously electrospun by using DMSO/chloroform co-solvent system and the size and morphology of fibers were investigated. It was found that the concentration of 8wt% CTA fibers were obtained from DMSO/chloroform with volume ratio of 1:1, 3:2, 2:1, 3:1. The average diameters of CTA fiber was decreased with decreasing chloroform content in the mixed solvent. The minimum diameter of the continuous electrospun cellulose triacetate fibers obtained in this work ranged between 210 and 880 nm.

APA, Harvard, Vancouver, ISO, and other styles

30

Naim, Abdullah F. Al, Huda AlFannakh, Samia Arafat, and S. S. Ibrahim. "Characterization of PVC/MWCNTs Nanocomposite: Solvent Blend." Science and Engineering of Composite Materials 27, no. 1 (2020): 55–64. http://dx.doi.org/10.1515/secm-2020-0003.

Full text

Abstract:

AbstractPolyvinyl Vinyl Chloride (PVC) multiwall carbon nanotubes (MWCNTs) nanocomposite flexible films were prepared using the solvent blend technique. Chloroform (CHCl3) and tetrahydrofuran ((CH2)4O) were used as solvents for MWCNTs and PVC, respectively. The effect of the solvents’ blend on electrical, optical and thermal properties of PVC/MWCNTs were investigated. The results of the Raman spectrum showed that all the characteristic bands of PVC polymer have a slight shift due to addition of MWCNTs. Electrical results showed that the nanocomposite samples with chloroform volume ratios of 10

APA, Harvard, Vancouver, ISO, and other styles

31

Guerdouh, Amel, and Djamel Barkat. "Experimental study of the extraction of chromium (III) from nitrate medium by lauric acid." Metallurgical and Materials Engineering 24, no. 3 (2018): 189–97. http://dx.doi.org/10.30544/385.

Full text

Abstract:

The solvent extraction of chromium (III) with lauric acid (HL) at 25°C is studied as a function of various parameters: pH of the aqueous phase, the concentration of lauric acid and the nature of the solvent. The solvent effects on the extraction of chromium (III) using polar and nonpolar solvents has been observed. It was shown that extracted species of the [Cr(OH)L2·2HL] formula are formed in cyclohexane, dichloromethane, chloroform, and toluene. However, in 1- -octanol or methyl isobutyl ketone, it was found a complex of the type [Cr(OH)L2]. The extraction constants and extraction yield (%E)

APA, Harvard, Vancouver, ISO, and other styles

32

Shenderovich, Ilya G., and Gleb S. Denisov. "Modeling of Solute-Solvent Interactions Using an External Electric Field—From Tautomeric Equilibrium in Nonpolar Solvents to the Dissociation of Alkali Metal Halides." Molecules 26, no. 5 (2021): 1283. http://dx.doi.org/10.3390/molecules26051283.

Full text

Abstract:

An implicit account of the solvent effect can be carried out using traditional static quantum chemistry calculations by applying an external electric field to the studied molecular system. This approach allows one to distinguish between the effects of the macroscopic reaction field of the solvent and specific solute–solvent interactions. In this study, we report on the dependence of the simulation results on the use of the polarizable continuum approximation and on the importance of the solvent effect in nonpolar solvents. The latter was demonstrated using experimental data on tautomeric equil

APA, Harvard, Vancouver, ISO, and other styles

33

Martinez, María V., María A. Molina, Silvestre Bongiovanni Abel, and Cesar A. Barbero. "Large Swelling Capacities of Crosslinked Poly(N-isopropylacrylamide) Gels in Organic Solvents." MRS Advances 3, no. 63 (2018): 3735–40. http://dx.doi.org/10.1557/adv.2018.594.

Full text

Abstract:

ABSTRACTPNIPAM hydrogels are widely studied materials which swell in a great extent in water and water like solvents (e.g. alcohols). The hydrophilic nature of PNIPAM networks is very attractive however it is an important disadvantage at the moment of encapsulating hydrophobic drugs, which minimize their use in other fields. In this work we studied the swelling in different solvent mixtures with water and also in pure nonaqueous solvents, some of them immiscible with water. Accordingly, PNIPAM gels swell strongly in highly polar solvents (e.g. chloroform) but it does not swell in slightly pola

APA, Harvard, Vancouver, ISO, and other styles

34

V., Sailaja, Madhu M., and Neeraja V. "Evaluation of anti-fungal activity of selected medicinal plant seed extracts of India." International Journal of Advances in Scientific Research 2, no. 5 (2016): 109. http://dx.doi.org/10.7439/ijasr.v2i5.3186.

Full text

Abstract:

In the present study aqueous, acetone, petroleum ether and chloroform solvents extracts of 6 selected plant seeds (Acacia catechu, Sida cordifolia, Momordica fotida, Albiziz procera, Mesua ferrea and Lantana camare ) are screened for their anti-fungal potential against 4 important fungal species(Candida albicans, Cryptococcus luteotus, Aspergillus niger and Mucor heimalis). Among the six plant seed extracts tested, petroleum ether and acetone extracts showed highest to moderate levels of anti-fungal activity when compared to standard anti-fungal drugs (fluconazole(1mg/ml) and Amphotericin B (1

APA, Harvard, Vancouver, ISO, and other styles

35

CAO, YUAN-CHENG, and YUAN-DI ZHAO. "EXTRACTION OF ANTHRAQUINONE DERIVATIVES FROM RHUBARB RHIZOMES AND THEIR ANTIBACTERIAL TESTS." Journal of Innovative Optical Health Sciences 04, no. 02 (2011): 127–32. http://dx.doi.org/10.1142/s1793545811001290.

Full text

Abstract:

Photometry was employed to study the optimum extraction conditions of anthraquinone derivatives from rhizomes of Rheum officinale Baill in this study. The influences of extraction solvents (chloroform, benzene, ethanol, methanol, and glycerol), acid, and extraction time on the extraction yield were discussed. The results indicate that, to the Rhubarb rhizomes powder with the average particle size 0.18 mm, the conditions of the extraction solvent composed by chloroform, glycerol, and sulfuric acid (20%) in the ratio of 4:1:1 (v:v), the weight of dried Rhubarb to the solvent volume in the ratio

APA, Harvard, Vancouver, ISO, and other styles

36

Landers, Gary M., and James A. Olson. "Absence of Isomerization of Retinyl Palmitate, Retinol, and Retinal in Chlorinated and Nonchlorinated Solvents Under Gold Light." Journal of AOAC INTERNATIONAL 69, no. 1 (1986): 50–55. http://dx.doi.org/10.1093/jaoac/69.1.50.

Full text

Abstract:

Abstract Purified solutions of all-trans retinyl palmitate, retinol, and retinaldehyde in chloroform, methylene chloride, or hexane were exposed to white light or gold fluorescent light or were kept in the dark, and the resulting isomer distributions were determined by LC (liquid chromatography). No significant isomerization of any of the retinoids occurred either in the dark or on exposure to gold light in any of the solvents tested. However, a large amount of the 9-cis isomer and only much smaller amounts of other cis isomers were produced when retinol or retinyl palmitate in chloroform or m

APA, Harvard, Vancouver, ISO, and other styles

37

Hendra, Surani. "Fat acid extraction from Naviculla Salinicola and Chlorella Vulgaris with simple laboratory tools." Jurnal Temapela 3, no. 2 (2021): 65–72. http://dx.doi.org/10.25077/temapela.3.2.65-72.2020.

Full text

Abstract:

Energy alternatives are starting to get attention due to the depletion of petroleum sources as the current fuel. One of them is biodiesel. Microalgae has the potential to produce fat that can be proceed into biodiesel. This study aims to find the shaking time and the suitable solvent with the extraction of microalgaes, namely Naviculla Salinicola and Chlorella Vulgaris fatty acids with various solvents, namely hexane, methanol and chloroform. Each microalgae can affect different cell walls that resulting in different extraction materials. The results showed that fatty acids Chlorella Vulgaris

APA, Harvard, Vancouver, ISO, and other styles

38

Martínez, Manuel A., Elisa E. Greciano, Jorge Cuéllar, José M. Valpuesta, and Luis Sánchez. "Globular Aggregates Stemming from the Self-Assembly of an Amphiphilic N-Annulated Perylene Bisimide in Aqueous Media." Nanomaterials 11, no. 6 (2021): 1457. http://dx.doi.org/10.3390/nano11061457.

Full text

Abstract:

Herein, we describe the synthesis of highly emissive amphiphilic N-annulated PBI 1 decorated with oligo ethylene glycol (OEG) side chains. These polar side chains allow the straightforward solubility of 1 in solvents of different polarity such as water, iPrOH, dioxane, or chloroform. Compound 1 self-assembles in aqueous media by π-stacking of the aromatic units and van der Waals interactions, favored by the hydrophobic effect. The hypo- and hypsochromic effect observed in the UV-Vis spectra of 1 in water in comparison to chloroform is diagnostic of H-type aggregation. Solvent denaturation expe

APA, Harvard, Vancouver, ISO, and other styles

39

Anggarani, Mirwa Adiprahara, and Roy Januardi Irawan. "Antioxidant Potential of Madura Knife Scallop (Solen sp) Extract as a Prevention of Oxidative Stress." Jurnal Kesehatan Masyarakat 15, no. 3 (2020): 382–89. http://dx.doi.org/10.15294/kemas.v15i3.19521.

Full text

Abstract:

Reactive Oxygen Species (ROS) are produced by humans as a result of cellular metabolism and environmental factors such as pollutants or cigarette smoke. ROS is a very reactive molecule and has the ability to damage cell structure. Oxidative stress is a condition between oxidants and antioxidants that is not balance, pathophysiologically, oxidative stress can trigger the risk of various diseases including hypertension, atherosclerosis, diabetes, heart failure, stroke and other chronic diseases. Oxidative stress can be overcome by intake of antioxidants. The purpose of this study was to determin

APA, Harvard, Vancouver, ISO, and other styles

40

Indarti, Eti, Marwan, and Wanrosli Wan Daud. "Dispersion Stability of Nanocellulose in Nonpolar Solvent: Chloroform." Materials Science Forum 998 (June 2020): 170–75. http://dx.doi.org/10.4028/www.scientific.net/msf.998.170.

Full text

Abstract:

Nanocellulose (NC) has been successfully isolated from Oil Palm Empty Fruit Bunch (OPEFB) by using catalyst 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) through mediated oxidation process. For use as a reinforcing component in polymer bionanocomposites, NC has to be completely dried to avoid agglomeration in the non-polar solvent. In this research three types of approaches namely, oven drying (OD), freeze drying (FD) and solvent exchange (SE) were used to remove the water. Based on the dispersion stability results, the NC prepared from the OD technique gave longer stable suspension tha

APA, Harvard, Vancouver, ISO, and other styles

41

Wang, Yi, Hong Song Fan, Xian Tao Wen, Yu Mei Xiao, Zhong Wei Gu, and Xing Dong Zhang. "Effect of Solvent on Porous PLA/HA Scaffolds Preparation Using Novel Solid H₂O₂ Porogen." Key Engineering Materials 342-343 (July 2007): 49–52. http://dx.doi.org/10.4028/www.scientific.net/kem.342-343.49.

Full text

Abstract:

Hydroxyapatite/polymer scaffolds with proper biomechanical properties and stable 3-D porous structure were fabricated by combining gas foaming with solvent-casting/particle-leaching technique, in which novel solid H2O2 were used as a porogen. During the manufacturing process, we found that the porosity, compressive strength and microstructure of the composites are varied from each other while different solvents (dichloromethane, acetone, chloroform and 1,4-dioxane) were used. Porosities of the specimens increase from 72±5 to 87±5% in accordance with the increase of boiling point from 39.75 to

APA, Harvard, Vancouver, ISO, and other styles

42

Nyquist, Richard A., Sam E. Settineri, and Davin A. Luoma. "Infrared Study of Benzaldehyde and 4-Substituted Benzaldehydes in Carbon Tetrachloride and/or Chloroform Solutions: The Carbonyl Group." Applied Spectroscopy 45, no. 10 (1991): 1641–48. http://dx.doi.org/10.1366/0003702914335157.

Full text

Abstract:

The carbonyl stretching mode of 4- x-benzaldehydes increases in frequency as the mole % CHCl3/CCl4 decreases and as the value of σP− or σRO for the 4- x atom or group increases. Other functional groups such as OH, NO2 and CN are also affected by interaction with the CHCl3 and/or CCl4 solvent system. Other solvents may interact differently with each functional group so that, say, vC=O vs. σP−, σRO, or solvent acceptor numbers (AN) may not correlate in a uniform manner in all solute/solvent systems.

APA, Harvard, Vancouver, ISO, and other styles

43

C, Nwokonkwo Dorothy. "UTILIZATION OF AQUEOUS, METHANOL AND CHLOROFORM EXTRACTS OF LOCAL PLANTS- IXORA COCCINEA AND HIBISCUS SABDARRIFFA (ZOBO) FROM ABAKALIKI AS FABRIC DYES." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 5 (2015): 3576–82. http://dx.doi.org/10.24297/jac.v11i5.4476.

Full text

Abstract:

This investigation dealt with the dyeing and fastness properties of crude constituents of Ixora coccinea and Hibiscus sabdarriffa plant species extracted using distilled water, methanol and chloroform. Approximately 150 g of each sample was soaked in the chosen solvent for four weeks, the percentage yields of the aqueous, methanol and chloroform extracts of Ixora coccinea were 38.47% and 13.40 % and 3.88 % respectively; Hibiscus sabdariffa gave yields of 22.85 % for the aqueous extract, 12.24 % for the methanol extract and 3.79 % for the chloroform extract. Aqueous, methanol and chloroform ext

APA, Harvard, Vancouver, ISO, and other styles

44

Putintseva, Maya N., Ilya L. Borisov, Alexey A. Yushkin, R. A. Kirk, P. M. Budd, and A. V. Volkov. "Effect of Casting Solution Composition on Properties of PIM-1/PAN Thin Film Composite Membranes." Key Engineering Materials 816 (August 2019): 167–73. http://dx.doi.org/10.4028/www.scientific.net/kem.816.167.

Full text

Abstract:

In this work, PIM-1 thin film composite membranes supported on PAN were developed. The influence of PIM-1 concentration and nature of solvent stabilizer on the structure and gas separation properties of TFC membranes were studied. It was shown that amylene stabilized chloroform as PIM-1 solvent allows membranes to be obtained with a uniform selective layer in the whole range of concentrations used, and the ethanol stabilized chloroform provides a uniform layer at 2 and 4 wt % PIM-1 concentration. The best CO2/N2 selectivities were 35,9 and 39,5 for 4 % wt PIM-1 solution in ethanol and amylene

APA, Harvard, Vancouver, ISO, and other styles

45

Jalan, Ishita, Lisa Lundin, and Jan van Stam. "Using Solubility Parameters to Model More Environmentally Friendly Solvent Blends for Organic Solar Cell Active Layers." Materials 12, no. 23 (2019): 3889. http://dx.doi.org/10.3390/ma12233889.

Full text

Abstract:

To facilitate industrial applications, as well as for environmental and health purposes, there is a need to find less hazardous solvents for processing the photoactive layer of organic solar cells. As there are vast amounts of possibilities to combine organic solvents and solutes, it is of high importance to find paths to discriminate among the solution chemistry possibilities on a theoretical basis. Using Hansen solubility parameters (HSP) offers such a path. We report on some examples of solvent blends that have been found by modelling HSP for an electron donor polymer (TQ1) and an electron

APA, Harvard, Vancouver, ISO, and other styles

46

Istyami, Astri Nur, Tatang Hernas Soerawidjaja, Tirto Prakoso, and Tri Ari Penia Kresnowati. "Performance of Various Organic Solvents as Reaction Media in Plant Oil Lipolysis with Plant Lipase." Reaktor 18, no. 2 (2018): 71. http://dx.doi.org/10.14710/reaktor.18.2.71-75.

Full text

Abstract:

Fatty acids are intermediate substances in synthesis of oleochemical products. Enzymatic technology of fatty acids production (also known as lipolysis) is now developing as potential substitution for the conventional production of fatty acid, i.e. thermal hydrolysis of triglyceride. It offers more economical process condition, low energy consumption, and minimal product degradation compared to the conventional process. This research aims to evaluate performance of various organic solvents as reaction media in lipolysis with plant latex lipase. Organic solvents observed were chloroform, n-hexan

APA, Harvard, Vancouver, ISO, and other styles

47

Khan, Naeemullah, Mustafa Tuzen, and Tasneem Gul Kazi. "Simple and Rapid Dual-Dispersive Liquid–Liquid Microextraction as an Innovative Extraction Method for Uranium in Real Water Samples Prior to the Determination of Uranium by a Spectrophotometric Technique." Journal of AOAC INTERNATIONAL 100, no. 6 (2017): 1848–53. http://dx.doi.org/10.5740/jaoacint.17-0054.

Full text

Abstract:

Abstract An innovative, rapid, and simple dual-dispersive liquid–liquid microextraction (DDLL-ME) approach was used to extract uranium from real samples for the first time. The main objective of this study was to disperse extraction solvent by using an air-agitated syringe system to overcome matrix effects and avoid dispersion of hazardous dispersive organic solvents by using heat. The DDLL-ME method consisted of two dispersive liquid–liquid extraction steps with chloroform as the extracting solvent. Uranium formed complexes with 4-(2-thiazolylazo) resorcinol in the aqueous phase and was extra

APA, Harvard, Vancouver, ISO, and other styles

48

Geczy, Reka, Drago Sticker, Nicolas Bovet, Urs O. Häfeli, and Jörg P. Kutter. "Chloroform compatible, thiol-ene based replica molded micro chemical devices as an alternative to glass microfluidic chips." Lab on a Chip 19, no. 5 (2019): 798–806. http://dx.doi.org/10.1039/c8lc01260a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Assoumatine, Tokouré, Brigitte L. Yvon, and James L. Charlton. "The complex photochemistry of 2,3-dibenzylidenesuccinates." Canadian Journal of Chemistry 82, no. 12 (2004): 1663–67. http://dx.doi.org/10.1139/v04-143.

Full text

Abstract:

The photochemistry of diethyl E,E-2,3-(3,4,5-trimethoxybenzylidene)succinate (8) is solvent dependent. In both protic and aprotic solvents, there is a photoequilibrium established between 8 and its E,Z-isomer (9). In chloroform at high light intensity, very little 9 is formed and the main product is 1,4-dihydronaphthalene (10), formed via photoinduced intramolecular [1,3]-sigmatropic hydrogen shift within an intermediate 1,8a-dihydronaphthalene (11). In protic solvents, irradiation of either 8 or 9 ultimately gives primarily the cis-1,2-dihydronaphthalene product (13), along with smaller amoun

APA, Harvard, Vancouver, ISO, and other styles

50

Marcus, AC. "Preliminary Screening of Phytoconstituents and Anti-Bacterial Examination of Annona muricata and Cucumbita maxima Leaves." Journal of Medical and Biological Science Research 6, no. 5 (2020): 69–73. http://dx.doi.org/10.36630/jmbsr_20013.

Full text

Abstract:

Dried leaves of Annona muricata and Cucumbita maxima were extracted using chloroform, methanol and hexane solvents. The extracts were analysed for phytoconstituents using standard procedures. A preliminary test was also carried out on the anti-bacterial properties of the different solvent extracts against S. aureus, V. cholera and E. coli. Phytochemical analysis of Annona muricata and Cucumbita maxima showed the presence of alkaloids, fats and oil, tannins, saponins, flavonoids, terpenoids, steroids and proteins. However, glycosides were not detected in any of the plant extracts and coumarins

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!