Search Results - "Petkova, R"

Foaming and Foam Stability for Mixed Polymer–Surfactant Solutions: Effects of Surfactant Type and Polymer Charge by Petkova, R, Tcholakova, S, Denkov, N. D

“…Solutions of surfactant–polymer mixtures often exhibit different foaming properties, compared to the solutions of the individual components, due to the strong…”
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Role of polymer–surfactant interactions in foams: Effects of pH and surfactant head group for cationic polyvinylamine and anionic surfactants by Petkova, R., Tcholakova, S., Denkov, N.D.

“…[Display omitted] ► Effect of cationic polymer on foaming properties of SDS and SDP1S is studied. ► Effect of polymer depends significantly on the head group…”
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Adsorption and self-assembly properties of the plant based biosurfactant, Glycyrrhizic acid by Tucker, I.M., Burley, A., Petkova, R.E., Hosking, S.L., Penfold, J., Thomas, R.K., Li, P.X., Webster, J.R.P., Welbourn, R., Doutch, J.

“…[Display omitted] There is an increased interest in the use of natural surfactant as replacements for synthetic surfactants due to their biosustainable and…”
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Self-assembly in escin-nonionic surfactant mixtures: From micelles to vesicles by Tucker, IM, Burley, A, Petkova, RE, Hosking, SL, R P Webster, J, X Li, P, Ma, K, Doutch, J, Penfoldoo, J, Thomas, RK

“…[Display omitted] Hypothesis: Saponins are a class of plant derived surfactants which are widely used in food related foams and emulsions, aerated drinks, and…”
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Promoting the adsorption of saponins at the hydrophilic solid-aqueous solution interface by the coadsorption with cationic surfactants by Tucker, IM, Burley, A, Petkova, RE, Hosking, SL, R P Webster, J, X Li, P, Ma, K, Penfold, J, Thomas, RK

“…[Display omitted] Hypothesis: Saponins are highly surface active glycosides, and are extensively used to stabilise emulsions and foams in beverages, foods, and…”
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Surfactant/biosurfactant mixing: Adsorption of saponin/nonionic surfactant mixtures at the air-water interface by Tucker, I.M., Burley, A., Petkova, R.E., Hosking, S.L., Thomas, R.K., Penfold, J., Li, P.X., Ma, K., Webster, J.R.P., Welbourn, R.

“…[Display omitted] Saponins are naturally occurring biosurfactants present in a wide range of plant species. They are highly surface active glycosides, and are…”
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Mixing Natural and Synthetic Surfactants: Co-Adsorption of Triterpenoid Saponins and Sodium Dodecyl Sulfate at the Air-Water Interface by Tucker, I M, Burley, A, Petkova, R E, Hosking, S L, Penfold, J, Thomas, R K, Li, P X, Webster, J R P, Welbourn, R

“…Saponins are highly surface active glycosides, derived from a wide range of plant species. Their ability to produce stable foams and emulsions has stimulated…”
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Nature of the Intermicellar Interactions in Ethoxylated Polysorbate Surfactants with High Degrees of Ethoxylation by Penfold, J, Thomas, R. K, Li, P. X, Tucker, I, Petkov, J, Petkova, R. E

“…Ethoxylated polysorbate Tween nonionic surfactants are extensively used as foam and emulsion stabilizers and in aqueous solution form globular micelles. The…”
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Increased Bone Mineral Density (Bmd) In Postmenopausal Women With Osteoporosis (Op) Receiving Two Denosumab Injections In Routine Clinical Practice In Bulgaria by Boyanov, M, Shinkov, A, Psachoulia, E, Intorcia, M, Petkova, R

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Medication-taking behaviour in Bulgarian women with postmenopausal osteoporosis treated with denosumab or monthly oral bisphosphonates by Petranova, T., Boyanov, M., Shinkov, A., Petkova, R., Intorcia, M., Psachoulia, E.

“…Summary Persistence with osteoporosis therapy is critical for fracture risk reduction. This observational study evaluated medication-taking behaviour of women…”
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Postpartum evaluation of the anal sphincter by transperineal three‐dimensional ultrasound in primiparous women after vaginal delivery and following surgical repair of third‐degree tears by the overlapping technique by Valsky, D. V., Messing, B., Petkova, R., Savchev, S., Rosenak, D., Hochner‐Celnikier, D., Yagel, S.

“…Objective Intrapartum damage to the anal sphincter is an important factor in fecal incontinence. Recognized lacerations occur in 0.36–8.4% of vaginal…”
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Do the Fama-French Factors Proxy for Innovations in Predictive Variables? by PETKOVA, RALITSA

“…The Fama-French factors HML and SMB are correlated with innovations in variables that describe investment opportunities. A model that includes shocks to the…”
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Deposition of organized surfactant films on solid substrates by Andreatta, G., Benattar, J.-J., Petkova, R., Wang, J.Y.J., Tong, P., Polidori, A., Pucci, B.

“…Newton black films correspond to the ultimate stage of thinning of surfactant films and are molecularly assembled. The organization properties of surfactant…”
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OP23.05: Post‐procedure 3D transperineal ultrasound evaluation of tension‐free vaginal tape placement by Valsky, D. V., Pomp, R., Godfrey, A., Petkova, R., Yagel, S., Lavy, Y.

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OP23.07: Rate and possible risk factors for levator ani muscle trauma in primiparae after term vaginal birth by Valsky, D. V., Petkova, R., Rosenak, D., Hochner‐Celnikier, D., Yagel, S.

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Is value riskier than growth? by Petkova, Ralitsa, Zhang, Lu

“…We study the relative risk of value and growth stocks. We find that time-varying risk goes in the right direction in explaining the value premium. Value betas…”
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Baseline characteristics of bulgarian patients prescribed evolocumab in clinical practice by Petkova, R., Postadzhiyan, A., Petrov, I., Tisheva, S., Borizanova-Petkova, A., Bridges, I.

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Self-assembly of Quillaja saponin mixtures with different conventional synthetic surfactants by Tucker, I.M., Burley, A., Petkova, R.E., Hosking, S.L., Webster, JR P., Li, P.X., Ma, K., Doutch, J., Penfold, J., Thomas, R.K.

“…Saponins are surface active glycosides which can be extracted from a range of different plant species. This class of biosurfactants is of much current interest…”
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Self-assembly in saponin mixtures: Escin/tea, tea/glycyrrhizic acid, and escin/glycyrrhizic acid mixtures by Tucker, I.M., Burley, A., Petkova, R.E., Hosking, S.L., Webster, J.R.P., Li, P.X., Ma, K., Doutch, J., Penfold, J., Thomas, R.K.

“…Saponins are plant based biosurfactants that are obtained from a wide variety of plant species. They are surface active glycosides with a hydrophobic group,…”
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Self-assembly in saponin/surfactant mixtures: Escin and sodium dodecylsulfate by Tucker, I.M., Burley, A., Petkova, R.E., Hosking, S.L., Webster, J.R.P., Li, P.X., Ma, K., Doutch, J., Penfold, J., Thomas, R.K.

“…Saponins are a class of bio-surfactants obtained from a wide variety of plant species. They are surface active glycosides which are used in the stabilisation…”
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