Relevant bibliographies by topics / BiTeX compounds

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Academic literature on the topic 'BiTeX compounds'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "BiTeX compounds"

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Tajkov, Zoltán, Dávid Visontai, László Oroszlány, and János Koltai. "Topological Phase Diagram of BiTeX–Graphene Hybrid Structures." Applied Sciences 9, no. 20 (October 15, 2019): 4330. http://dx.doi.org/10.3390/app9204330.

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Combining graphene with other novel layered materials is a possible way for engineering the band structure of charge carriers. Strong spin-orbit coupling in BiTeX compounds and the recent fabrication of a single layer of BiTeI points towards a feasible experimental realization of a Kane–Mele phase in graphene-based heterostructures. Here, we theoretically demonstrate the tunability of the topological phase of hybrid systems built from graphene and BiTeX (X = I, Br, Cl) layers by uniaxial in-plane tensile and out-of plane compressive strain. We show that structural stress inherently present in fabricated samples could induce a topological phase transition, thus turning the sample in a novel experimental realization of a time reversal invariant topological insulator.
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Tarrega, Amparo, Claude Yven, Etienne Semon, Patrick Mielle, and Christian Salles. "Effect of Oral Physiology Parameters on In-Mouth Aroma Compound Release Using Lipoprotein Matrices: An In Vitro Approach." Foods 8, no. 3 (March 21, 2019): 106. http://dx.doi.org/10.3390/foods8030106.

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Temporal aroma compound release during eating is a function of the physicochemical properties of the food matrix, aroma compounds, and oral physiology of individuals. However, the influence of each parameter on the release of each aroma component should be clarified. Two flavored lipoprotein matrices varying in composition were chewed in a chewing simulator that reproduced most of the physiological functions of the mouth. Aroma compound releases (butanoic acid, 2-heptanone, ethyl butyrate, 3-octanone, and 2-nonanone) were followed in real time by direct connection of the device to APCI-MS (atmospheric pressure chemical ionization mass spectrometry). Each oral parameter was controlled and decoupled using the in vitro device. The food matrix composition had only a low impact on aroma compound release, but the controlled oral parameters had significantly different influences on the release of aroma compounds according to their physicochemical characteristics. The release of certain compounds seemed more sensitive to bite force, while others seemed more sensitive to the shearing angle. The salivary flow rate primarily influenced the more hydrophobic compounds. Significant interactions were also observed between shear angle, salivary flow rate, and lipoprotein matrix composition, mainly for the release of the more hydrophobic volatile compounds; this needs further investigations to be clarified.
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Murini, Tri, Mae Sri Hartati Wahyuningsih, Tri Baskoro Tunggul Satoto, Achmad Fudholi, and Muhammad Hanafi. "ISOLATION AND IDENTIFICATION OF NATURALLY OCCURRING LARVICIDAL COMPOUND ISOLATED FROM ZINGIBER ZERUMBET (L).J.E. SMITH." Asian Journal of Pharmaceutical and Clinical Research 11, no. 2 (February 1, 2018): 189. http://dx.doi.org/10.22159/ajpcr.2018.v11i2.21703.

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Objective: A naturally occurring larvicidal compound is an alternative to eradication of Aedes aegypti larvae. This compound is toxic to larvae but relatively safe for human. Rhizome of Lempuyang gajah (Zingiber zerumbet (L.) J. E. Smith) has been used traditionally to prevent mosquito bites. An initial study indicated that petroleum ether (PE) soluble fraction of the methanol (MeOH) extract of Z. zerumbet was toxic against larvae lethal concentration (LC50), 67.01±2.35 versus 153.57±4.01 ppm (MeOH ext.). Therefore, this study aimed to isolate and identify the compounds with larvicidal activity from Z. zerumbet rhizome.Methods: The PE soluble (PE-soluble) fraction was subjected to a bioassay-guided fractionation and isolation method to obtain four (4) fractions (I-IV). Two compounds (1 and 2) were isolated from Fraction I that was the most active compared to other fractions (II-IV). Compound 1 turned out to be more active than compound 2; therefore, compound 1 was then identified by means of spectroscopic data.Results: Based on the LC50 values, compound 1 was more active than compound 2 (LC50, 41.75±0.05 and LC90, 57.66±3.37 [1] versus 1122.27±1.80 and 1875.69±1.35 ppm [2]), and compound 1 was identified as Zerumbone.Conclusion: Zerumbone was the main active compound; in the future, this compound can be formulated as a standardized preparation based on the content.
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Dobson, James S., Christina N. Zdenek, Chris Hay, Aude Violette, Rudy Fourmy, Chip Cochran, and Bryan G. Fry. "Varanid Lizard Venoms Disrupt the Clotting Ability of Human Fibrinogen through Destructive Cleavage." Toxins 11, no. 5 (May 7, 2019): 255. http://dx.doi.org/10.3390/toxins11050255.

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The functional activities of Anguimorpha lizard venoms have received less attention compared to serpent lineages. Bite victims of varanid lizards often report persistent bleeding exceeding that expected for the mechanical damage of the bite. Research to date has identified the blockage of platelet aggregation as one bleeding-inducing activity, and destructive cleavage of fibrinogen as another. However, the ability of the venoms to prevent clot formation has not been directly investigated. Using a thromboelastograph (TEG5000), clot strength was measured after incubating human fibrinogen with Heloderma and Varanus lizard venoms. Clot strengths were found to be highly variable, with the most potent effects produced by incubation with Varanus venoms from the Odatria and Euprepriosaurus clades. The most fibrinogenolytically active venoms belonged to arboreal species and therefore prey escape potential is likely a strong evolutionary selection pressure. The results are also consistent with reports of profusive bleeding from bites from other notably fibrinogenolytic species, such as V. giganteus. Our results provide evidence in favour of the predatory role of venom in varanid lizards, thus shedding light on the evolution of venom in reptiles and revealing potential new sources of bioactive molecules useful as lead compounds in drug design and development.
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Preciado, Lina María, Jaime Andrés Pereañez, and Jeffrey Comer. "Potential of Matrix Metalloproteinase Inhibitors for the Treatment of Local Tissue Damage Induced by a Type P-I Snake Venom Metalloproteinase." Toxins 12, no. 1 (December 20, 2019): 8. http://dx.doi.org/10.3390/toxins12010008.

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Snake bite envenoming is a public health problem that was recently included in the list of neglected tropical diseases of the World Health Organization. In the search of new therapies for the treatment of local tissue damage induced by snake venom metalloproteinases (SVMPs), we tested the inhibitory activity of peptidomimetic compounds designed as inhibitors of matrix metalloproteinases on the activities of the SVMP Batx-I, from Bothrops atrox venom. The evaluated compounds show great potential for the inhibition of Batx-I proteolytic, hemorrhagic and edema-forming activities, especially the compound CP471474, a peptidomimetic including a hydroxamate zinc binding group. Molecular dynamics simulations suggest that binding of this compound to the enzyme is mediated by the electrostatic interaction between the hydroxamate group and the zinc cofactor, as well as contacts, mainly hydrophobic, between the side chain of the compound and amino acids located in the substrate binding subsites S1 and S1 ′ . These results show that CP471474 constitutes a promising compound for the development of co-adjuvants to neutralize local tissue damage induced by snake venom metalloproteinases.
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HIRATA, M., E. KUNIEDA, and M. TOBISA. "Short-term ingestive behaviour of cattle grazing tropical stoloniferous grasses with contrasting growth forms." Journal of Agricultural Science 148, no. 5 (June 25, 2010): 615–24. http://dx.doi.org/10.1017/s0021859610000353.

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SUMMARYRelationships between sward height and short-term ingestive behaviour of cattle were examined for two tropical stoloniferous grasses with contrasting growth forms: centipede grass (Eremochloa ophiuroides(Munro) Hack.; (CG); strongly prostrate) and bahia grass (Paspalum notatumFlügge; (BG); more erect). Turves (500×500 mm) were extracted from field monoculture swards of each grass after the varying duration of re-growth, and presented to animals for a short period (10 bites) to measure bite dimensions (area, depth and volume), bite mass, time per bite and intake rate. In the same re-growth period, CG was always shorter and denser than BG. Bite dimensions, the bite mass and the intake rate of animals increased at a declining rate as the sward height increased for both grasses, showing a tendency for a steeper initial increase, an earlier plateau and a lower maximum in CG than in BG. Due to the difference in the shape of the intake rate response, animals on BG were estimated to require a longer grazing time than those on CG to attain the same daily herbage intake, when the sward is shorter than about 200 mm. The sward height below which the daily intake of animals may be restricted was lower for CG (61–70 mm) than for BG (71–92 mm). The results indicate an advantage of strongly prostrated, highly dense grasses (e.g. CG) over more erect, less dense grasses (e.g. BG) when grazed at a relatively low height (<200 mm). In relation to increasing bite mass, the time per bite pooled over CG and BG was constant until the bite mass reached a critical value (0·55 g dry matter (DM)) and thereafter increased linearly with the bite mass, confirming that cattle are able to perform compound jaw movements that gather herbage into the mouth (manipulative jaw movement) and chew herbage already in the mouth (chewing jaw movement) within one cycle of opening and closing of the jaws.
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Hasanova, G. S., A. I. Aghazade, Y. A. Yusibov, and M. B. Babanly. "Thermodynamıc Propertıes of the BiTe and Bi8Te9 Compounds." Physics and Chemistry of Solid State 21, no. 4 (December 31, 2020): 714–19. http://dx.doi.org/10.15330/pcss.21.4.714-719.

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Two-phase alloys Bi8Te9+Bi4Te5 and BiTe+Bi8Te9 were studied by the electromotive forces method (EMF) in the temperature range 300-450 K. From the EMF data, the relative partial molar functions of bismuth in the alloys were calculated. The potential-forming reactions responsible for these partial functions were compiled, the values of the standard thermodynamic functions of formation, and the standard entropies of Bi8Te9 and BiTe compounds were calculated. A comparative analysis of the data for BiTe with the literature data was carried out; for Bi8Te9, the thermodynamic functions were obtained for the first time.
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Medalia, A. I., A. L. Alesi, and J. L. Mead. "Pattern Abrasion and Other Mechanisms of Wear of Tank Track Pads." Rubber Chemistry and Technology 65, no. 1 (March 1, 1992): 154–75. http://dx.doi.org/10.5254/1.3538597.

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Abstract Wear of tank track pads has been studied under different conditions. With T142 pads tested on an M-60 tank, the mode of failure was found to depend on the test conditions. Among eighteen experimental compounds tested, improved wear (vs. the standard compound) under one test condition was generally at the expense of poorer wear under one or both of the other test conditions. However, in agreement with previous results, an HNBR/Zn-methacrylate/peroxide compound gave improved wear rate under all three test conditions. Wear of the T142 pads on a hilly cross-country course and on a combination course was generally by massive chunking. On a paved road course, most compounds wore by pattern abrasion. A few compounds worn on this course formed deep pockets parallel to the surface, resulting in the eventual loss of the large flaps between the pocket and the surface. Pattern abrasion was also found on T156 pads of four different compounds, tested on an M-1 tank on the paved road course. The abrasion patterns of both types of pads had a shingled appearance, with the ridges pitched so as to bite into the road surface. The abrasion patterns were characterized quantitatively by profilometry, using standard parameters calculated for surface roughness of metals and other materials. The ridge height and its ratio to ridge spacing correlated positively with wear rate on the paved road; whereas there was no correlation of ridge spacing with wear rate. The compounds which gave the lowest wear rate on the paved road, including the HNBR compounds, gave shallow ridges with little or no pattern.
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Castro, R., M. L. Durán, J. A. García-Vázquez, J. Romero, A. Sousa, A. Castiñeiras, W. Hiller, and J. Strähle. "Electrochemical Syntheses of Pyrimidine-2-thiolato Complexes of Nickel(II) / Crystal and Molecular Structure of 2,2′-Bipyridine-bis(pyrimidine-2-thiolato)nickel(II) Monohydrate." Zeitschrift für Naturforschung B 45, no. 12 (December 1, 1990): 1632–36. http://dx.doi.org/10.1515/znb-1990-1206.

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The electrochemical oxidation of nickel in pyrimidine-2-thione (pymt H) solution yields a compound of formula [Ni(pymt)2]. When pyridine (py), 2,2′-bipyridine (bipy) or 1,10-phenanthroline (phen) are added to the solution phase, the product obtained is a complex [Ni(pymt)2py2] or [Ni(pymt)2L] (L = bipy or phen). The crystal structure of [Ni(pymt)2bipy] · H2O is monoclinic, space group P 21/c, with a = 726.6(2), b = 1586.2(2), c = 1696.7(4) pm, β = 99.04(4)° and Z = 4. The nickel atom has highly distorted octahedral coordination and the pyrimidine-2-thiolato ligand is bidentate, forming two four-membered chelate rings with a small “bite” angle of ca. 68°. The two sulphur atoms are in a trans arrangement. The vibrational and electronic spectra of the compounds are discussed.
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Pooja S Dev and Meenatchisundaram S. "In vitro Neutralisation Potential of Metal-Herbal (Copper-Leucas zeylanica) Nanocomposite (MHNC) against Naja naja and Bungarus caeruleus Venoms." International Journal of Research in Pharmaceutical Sciences 11, SPL4 (December 21, 2020): 2084–91. http://dx.doi.org/10.26452/ijrps.v11ispl4.4423.

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Snake-bite gives rise to significant socio-economic, and limitations of antivenom have raised the necessity for the development of novel neutralising compounds. The present study concentrates on evaluating the neutralisation potential of Copper nanoparticles, Leucas zeylanica leaf extracts and Metal-Herbal Nanocomposite (MHNC) against Naja naja and Bungarus caeruleus venoms. The antigenic potency of snake venoms was determined by gel precipitation test. Leucas zeylanica leaves were used for extraction, and extracts were further purified by column chromatography. Size of Leucas zeylanica extract was found to be 86.7±7.1nm and 249.4±27.3nm for MHNC. Zeta potential values determined the Stability of the MHNC. MHNC showed higher neutralisation to venoms than the Leucas zeylanica extracts. In direct hemolysis, the efficiency of Naja naja and Bungarus caeruleus venoms treated with Leucas zeylanica leaf extract was found to be 30% and 27.2%, whereas MHNC showed 16.1% against Naja naja venom and 17.1% Bungarus caeruleus venom. From Indirect analysis, Naja naja and Bungarus caeruleus venom were able to produce 28mm and 26mm diameter hemolytic halo zones. On treatment with MHNC, the zones were reduced to 15mm and 11mm than Leucas zeylanica extract. This result indicates the MHNC can be used for the treatment of snake bites.
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Dissertations / Theses on the topic "BiTeX compounds"

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Šikula, Marek. "Infračervená magneto-spektroskopie polovodičů Rashbova typu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231998.

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Optická odezva BiTeX (X = I, Cl, Br) polovodičových materiálů s obřím spinovým štěpením Rashbova typu je studována za nízkých teplot do vysokých magnetických polí, kde je směr magnetické indukce kolmý na povrch vzorku (Faradayova konfigurace). Na rozdíl od reflexního uspořádání nám transmisní uspořádání umožňuje přímé pozorování přechodů mezi Landauovými hladinami v blízkosti křižiště vodivostních pásů - Diracův bod. Optická odezva BiTeX sloučenin je srovnána s teoretickým modelem spočteným v rámci Kubo-Greenwoodova formalismu z Rashbova hamiltonianu.
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Book chapters on the topic "BiTeX compounds"

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Dwivedi, Manish Kumar, and Prashant Kumar Singh. "Anti-Malarial Drug Resistance." In Advanced Pharmacological Uses of Medicinal Plants and Natural Products, 154–76. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2094-9.ch008.

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Malaria is a life-threatening infectious disease caused by a protozoan parasite of the genus Plasmodium. It is transmitted through the bites of infected female Anopheles mosquitoes. The global burden is estimated to be around 219 million cases in 87 countries. Natural compounds have been used primarily in the traditional medicine for thousands of years. For the treatment of malaria, natural products were used until the development of synthetic drugs, and most of the currently available anti-malarial drugs have been derived based on the compounds from these traditional medicinal plants. The current chapter tries to briefly indicate the emerging resistance against anti-malarial drugs and to discuss the recent research on natural products that have been evaluated for anti-malarial activity. Rigorous evaluation of the efficacy and safety of traditional medicines is required along with identification of active constituents in order to develop new drugs with novel mechanisms of action.
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Wyatt, Jonathan P., Robert G. Taylor, Kerstin de Wit, Emily J. Hotton, Robin J. Illingworth, and Colin E. Robertson. "Wounds, fractures, and orthopaedics." In Oxford Handbook of Emergency Medicine, 408–518. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198784197.003.0009.

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This chapter in the Oxford Handbook of Emergency Medicine investigates wounds, fractures, and orthopaedics in the emergency department (ED). It reviews classification and assessment of skin wounds, puncture wounds, and foreign bodies, and discusses wound cleaning, closure, aftercare, infected wounds, bites and stings, tetanus, and needlestick injury. It explores fractures, including open (compound) fracture and dislocation (and subluxation), casts and their problems, and osteoporosis, as well as soft tissue injury, physiotherapy in the ED, and fracture clinic and alternatives. It describes different areas of fracture and injury in detail, including hand, thumb, scaphoid, and carpal injury, Colles’ fracture, Smith’s fracture, Barton’s and reverse Barton’s fracture, wrist injury, forearm fracture, elbow injury, humeral fracture, shoulder dislocation, clavicle injury, neck injury, facial wounds, pelvic fracture, hip dislocation, sacral and coccygeal fracture, femur fracture, knee injury, tibial and fibular shaft fracture, pretibial laceration, calf and Achilles tendon injury, ankle injury, foot fracture and dislocation, toe injury, low back pain, arthritis, and eponymous fractures.
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Zwaan, Michel, Gareth J. Veal, and Lucas Moreno. "Chemotherapy and Other Anti-Cancer Drugs." In Oxford Textbook of Cancer in Children, 21–30. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198797210.003.0003.

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Chemotherapy plays a prominent role in the treatment of paediatric malignancies. Several pharmacokinetic and pharmacodynamic mechanisms must be taken into account when administering chemotherapy. These mechanisms may contribute to the clearance, toxicity, and/or efficacy of cytotoxic drugs. Examples are age, sex, body composition, genetic polymorphisms, and co-administered drugs. A new era of childhood cancer treatment is emerging, characterized by the development of new agents resulting from advances in molecular biology. Directing drugs against the abnormalities identified only in tumour cells is known as targeted therapy. Such compounds ought to have better anti-tumour activity and improved safety profiles. Monoclonal antibodies are becoming more important, especially in the treatment of haematological malignancies, but also in neuroblastoma. Moreover, other advances in immunotherapy, with bispecific T-cell engaging (BITE) antibodies and chimeric-antigen receptor T-cells for example, are rapidly changing the landscape of available therapies to treat childhood cancer. After a long period during which there were very few registrations of new drugs for use in children, the regulatory incentives introduced in both North America and Europe now stimulate research directed towards the identification and evaluation of new drugs in paediatric oncology.
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Calvert, Jack G., John J. Orlando, William R. Stockwell, and Timothy J. Wallington. "Mechanisms of Reactions of HO2 and RO2 Radicals." In The Mechanisms of Reactions Influencing Atmospheric Ozone. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190233020.003.0008.

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The peroxy radicals are an important link in the reaction chain that develops ozone in the atmosphere through their reactions with NO. This chapter explores the kinetics and mechanisms of these RO2 reactions. In Chapters III and IV, the kinetics and mechanisms of the reactions of organic compounds with the major atmospheric oxidants [HO, NO3, and O3] were discussed. The organic radicals formed in these reactions add O2 to form organic peroxy radicals (RO2). The rate coefficient for these reaction is typically of the order of (10−12–10−11) cm3 molecule−1 s−1 under tropospheric conditions. One atmosphere (1 atm) of air contains 5 × 1018 molecule cm−3 of O2, and the lifetime of organic radicals with respect to addition of O2 to give peroxy radicals is 10–100 nanoseconds. Addition of O2 is essentially the sole atmospheric fate of the organic radicals formed during the oxidation of organic compounds. As examples, consider the HO-initiated oxidation of ethane and acetone (M is a third body, such as N2, which collisionally deactivates the nascent peroxy radical): . . . HO + CH3CH3 → CH3CH2 + H2O . . . . . . CH3CH2 + O2 + M → CH3CH2O2 + M . . . . . . HO + CH3C(O)CH3 → CH3C(O)CH2 + H2O . . . . . . CH3C(O)CH2 + O2 + M → CH3C(O)CH2O2 + M . . . Because of the rapidity and exclusivity of the O2 addition to alkyl radicals, the organic peroxy radicals (CH3CH2O2 and CH3C(O)CH2O2) can be thought of as the primary products of the initial oxidation step. HO2 radicals are formed in reactions of O2 with alkoxy radicals (e.g., CH3O) and by the association reaction of H atoms with O2: . . . CH3O + O2 → CH2O + HO2 . . . . . . H + O2 + M → HO2 + M . . . Peroxy radicals (HO2 and RO2) have a rich atmospheric chemistry and undergo reactions with NO, NO2, HO2, and other peroxy radicals (R′O2). Unimolecular isomerization is also an important fate for larger organic peroxy radicals where the peroxy radical can abstract a hydrogen atom from another part of the organic moiety (the peroxy radical bites its own tail). Reactions of peroxy radicals with NO3 radicals at night, and ClO and BrO radicals in maritime environments, can also be of importance on local scales.
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"Hypelete trifoliata—Known as hueso de costa (coastal bone), the wood is valued in the Caribbean. (See p. 42.) Ipomoea pes-caprae—“Goat’s foot” or riñonina (little kidney) contains compounds as effective as Benadryl® in treating insect stings and bites. (See p. 366.)." In Florida Ethnobotany, 731. CRC Press, 2004. http://dx.doi.org/10.1201/9780203491881-104.

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