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Awadallah-F A, Elhady MA, Mousaa IM. Preparation and characterization of wet adhesives based on (poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate)/castor oil/styrene butadiene rubber) using gamma irradiation for trapping of reptiles and rodents. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03135-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AbstractWet adhesives from poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate), castor oil, and styrene butadiene rubber were prepared at variable compositions. These components were exposed to a certain range of irradiation dose for γ-rays. Wet adhesives were characterized by adhesion force, Fourier transform infrared, thermogravimetric analysis and derivative thermal gravimetric, gel permeation chromatography, proton nuclear magnetic resonance spectroscopy and scan electron microscopy. Results declared that dose and composition have significant effect on features of wet adhesives. Further, the adhesion force and thermal stability of wet adhesives improved by increasing the irradiation dose. Moreover, the adhesion force reached ~ 690 (kPa). The analysis of gel permeation chromatography showed that molecular weight of wet adhesive 48,921 (g/mol). The wet adhesives were exploited to trap reptiles and rodents. Through the results, it can be observed that the wet adhesives had good efficiency for trapping the reptiles and rodents. The results showed that the best sample of wet adhesive was from 98% of [poly (vinyl butyral-co-vinyl alcohol-co-vinyl (10%)/castor oil (90%))] to [2% of styrene butadiene rubber] at 30 kGy In conclusion, this study referred that this type of wet adhesive has an excellent ability to adhere and trap of reptiles and rodents such as geckos and mice respectively. Consequently, these wet adhesives could be utilized in pilot scale.
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Poly(methyl methacrylate) with Oleic Acid as an Efficient Candida albicans Biofilm Repellent. MATERIALS 2022; 15:ma15113750. [PMID: 35683049 PMCID: PMC9181749 DOI: 10.3390/ma15113750] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 02/05/2023]
Abstract
Poly(methyl methacrylate) (PMMA), widely used in dentistry, is unfortunately a suitable substrate for Candida (C.) albicans colonization and biofilm formation. The key step for biofilm formation is C. albicans ability to transit from yeast to hypha (filamentation). Since oleic acid (OA), a natural compound, prevents filamentation, we modified PMMA with OA aiming the antifungal PMMA_OA materials. Physico-chemical properties of the novel PMMA_OA composites obtained by incorporation of 3%, 6%, 9%, and 12% OA into PMMA were characterized by Fourier-transform infrared spectroscopy and water contact angle measurement. To test antifungal activity, PMMA_OA composites were incubated with C. albicans and the metabolic activity of both biofilm and planktonic cells was measured with a XTT test, 0 and 6 days after composites preparation. The effect of OA on C. albicans morphology was observed after 24 h and 48 h incubation in agar loaded with 0.0125% and 0.4% OA. The results show that increase of OA significantly decreased water contact angle. Metabolic activity of both biofilm and planktonic cells were significantly decreased in the both time points. Therefore, modification of PMMA with OA is a promising strategy to reduce C. albicans biofilm formation on denture.
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Chahande AM, Lathigara D, Prabhune AA, Devi RN. Red fluorescent ultra-small gold nanoclusters functionalized with signal molecules to probe specificity in quorum sensing receptors in gram-negative bacteria. Arch Microbiol 2021; 203:4293-4301. [PMID: 34109439 DOI: 10.1007/s00203-021-02338-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 04/13/2021] [Accepted: 04/17/2021] [Indexed: 02/03/2023]
Abstract
Ultra-small (size < 2 nm) gold nanoclusters (AuNCs) are used as fluorescent probes which have excellent applications in bioimaging and sensing due to their emission in visible and NIR spectral region. Here, this property is exploited for understanding the quorum sensing phenomenon in bacteria which is regulated by signal molecules which are specific to various species. AuNCs are then functionalized with the signal molecules, Acyl Homoserine Lactones (AHL) of varying carbon chain length, C-6, C-8, and C-12 without 3rd C modification, to sense different strains of gram-negative bacteria i.e., Escherichia coli, Cronobacter sakazakii and Pseudomonas aeruginosa. In the concentration employed, selectivity to a limited extent is observed between the three Gram-negative bacteria tested. E. coli showed emission with all the AHL conjugates and P. aeruginosa did not interact with any of the three conjugates, whereas C. sakazakii showed specificity to C-8AHL. This is probably due to selectivity for cognate AHL molecules of appropriate concentrations.
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Affiliation(s)
- Anurag M Chahande
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Kamla Nehru Nagar, Ghaziabad, 201002, India
| | - Disha Lathigara
- Biochemical Science Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Asmita A Prabhune
- Biochemical Science Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.
| | - R Nandini Devi
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Kamla Nehru Nagar, Ghaziabad, 201002, India.
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Capezza AJ, Muneer F, Prade T, Newson WR, Das O, Lundman M, Olsson RT, Hedenqvist MS, Johansson E. Acylation of agricultural protein biomass yields biodegradable superabsorbent plastics. Commun Chem 2021; 4:52. [PMID: 36697586 PMCID: PMC9814733 DOI: 10.1038/s42004-021-00491-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 03/16/2021] [Indexed: 01/28/2023] Open
Abstract
Superabsorbent polymers (SAP) are a central component of hygiene and medical products requiring high liquid swelling, but these SAP are commonly derived from petroleum resources. Here, we show that sustainable and biodegradable SAP can be produced by acylation of the agricultural potato protein side-stream (PPC) with a non-toxic dianhydride (EDTAD). Treatment of the PPC yields a material with a water swelling capacity of ca. 2400%, which is ten times greater than the untreated PPC. Acylation was also performed on waste potato fruit juice (PFJ), i.e. before the industrial treatment to precipitate the PPC. The use of PFJ for the acylation implies a saving of 320 000 tons as CO2 in greenhouse gas emissions per year by avoiding the industrial drying of the PFJ to obtain the PPC. The acylated PPC shows biodegradation and resistance to mould growth. The possibilities to produce a biodegradable SAP from the PPC allows for future fabrication of environment-friendly and disposable daily-care products, e.g. diapers and sanitary pads.
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Affiliation(s)
- Antonio J. Capezza
- grid.5037.10000000121581746Fibre and Polymer Technology Department, KTH Royal Institute of Technology, Stockholm, Sweden ,Plant Breeding Department, SLU Alnarp, Lomma, Sweden
| | - Faraz Muneer
- Plant Breeding Department, SLU Alnarp, Lomma, Sweden
| | - Thomas Prade
- Biosystems and Technology Department, SLU Alnarp, Lomma, Sweden
| | | | - Oisik Das
- grid.6926.b0000 0001 1014 8699Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering Division, Luleå University of Technology, Luleå, Sweden
| | | | - Richard T. Olsson
- grid.5037.10000000121581746Fibre and Polymer Technology Department, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Mikael S. Hedenqvist
- grid.5037.10000000121581746Fibre and Polymer Technology Department, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Eva Johansson
- Plant Breeding Department, SLU Alnarp, Lomma, Sweden
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Capezza AJ, Robert E, Lundman M, Newson WR, Johansson E, Hedenqvist MS, Olsson RT. Extrusion of Porous Protein-Based Polymers and Their Liquid Absorption Characteristics. Polymers (Basel) 2020; 12:polym12020459. [PMID: 32079125 PMCID: PMC7077648 DOI: 10.3390/polym12020459] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 11/26/2022] Open
Abstract
The production of porous wheat gluten (WG) absorbent materials by means of extrusion processing is presented for the future development of sustainable superabsorbent polymers (SAPs). Different temperatures, formulations, and WG compositions were used to determine a useful protocol that provides the best combination of porosity and water swelling properties. The most optimal formulation was based on 50 wt.% WG in water that was processed at 80 °C as a mixture, which provided a porous core structure with a denser outer shell. As a green foaming agent, food-grade sodium bicarbonate was added during the processing, which allowed the formation of a more open porous material. This extruded WG material was able to swell 280% in water and, due to the open-cell structure, 28% with non-polar limonene. The results are paving the way towards production of porous bio macromolecular structures with high polar/non-polar liquid uptake, using extrusion as a solvent free and energy efficient production technique without toxic reagents.
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Affiliation(s)
- Antonio J. Capezza
- Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; (E.R.); (M.S.H.)
- Department of Plant Breeding, SLU Swedish University of Agricultural Sciences, BOX 101, SE-230 53 Alnarp, Sweden; (W.R.N.); (E.J.)
- Correspondence: (A.J.C.); (R.T.O.); Tel.: +46-762-301654 (A.J.C.); +46-732-701868 (R.T.O.)
| | - Eva Robert
- Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; (E.R.); (M.S.H.)
| | - Malin Lundman
- Essity Hygiene and Health AB, SE-405 03 Gothenburg, Sweden;
| | - William R. Newson
- Department of Plant Breeding, SLU Swedish University of Agricultural Sciences, BOX 101, SE-230 53 Alnarp, Sweden; (W.R.N.); (E.J.)
| | - Eva Johansson
- Department of Plant Breeding, SLU Swedish University of Agricultural Sciences, BOX 101, SE-230 53 Alnarp, Sweden; (W.R.N.); (E.J.)
| | - Mikael S. Hedenqvist
- Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; (E.R.); (M.S.H.)
| | - Richard T. Olsson
- Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; (E.R.); (M.S.H.)
- Correspondence: (A.J.C.); (R.T.O.); Tel.: +46-762-301654 (A.J.C.); +46-732-701868 (R.T.O.)
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Capezza AJ, Lundman M, Olsson RT, Newson WR, Hedenqvist MS, Johansson E. Carboxylated Wheat Gluten Proteins: A Green Solution for Production of Sustainable Superabsorbent Materials. Biomacromolecules 2020; 21:1709-1719. [PMID: 31899621 DOI: 10.1021/acs.biomac.9b01646] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Functionalized wheat gluten (WG) protein particles with the ability to absorb fluids within the superabsorbent range are presented. Ethyleneditetraacetic dianhydride (EDTAD), a nontoxic acylation agent, was used for the functionalization of the WG protein at higher protein content than previously reported and no additional chemical cross-linking. The 150-550 μm protein particles had 50-150 nm nanopores induced by drying. The EDTAD treated WG were able to absorb 22, 5, and 3 times of, respectively, water, saline and blood, per gram of dry material (g/g), corresponding to 1000, 150 and 100% higher values than for the as-received WG powder. The liquid retention capacity after centrifugation revealed that almost 50% of the saline liquid was retained within the protein network, which is similar to that for petroleum-based superabsorbent polymers (SAPs). An advantageous feature of these biobased particulate materials is that the maximum swelling is obtained within the first 10 min of exposure, that is, in contrast to many commercial SAP alternatives. The large swelling in a denaturation agent (6 M urea) solution (about 32 g/g) suggests that the secondary entangled/folded structure of the protein restricts protein network expansion and when disrupted allows the absorption of even higher amounts of liquid. The increased liquid uptake, utilization of inexpensive protein coproducts, easy scalable protocols, and absence of any toxic chemicals make these new WG-based SAP particles an interesting alternative to petroleum-based SAP in, for example, absorbent disposable hygiene products.
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Affiliation(s)
- Antonio J Capezza
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden.,Department of Plant Breeding, Faculty of Landscape Planning, Horticulturem and Crop Production Sciences, SLU Swedish University of Agricultural Sciences, Alnarp 23053, Sweden
| | - Malin Lundman
- Essity Hygiene and Health AB, SE-405 03, Gothenburg, Sweden
| | - Richard T Olsson
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - William R Newson
- Department of Plant Breeding, Faculty of Landscape Planning, Horticulturem and Crop Production Sciences, SLU Swedish University of Agricultural Sciences, Alnarp 23053, Sweden
| | - Mikael S Hedenqvist
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - Eva Johansson
- Department of Plant Breeding, Faculty of Landscape Planning, Horticulturem and Crop Production Sciences, SLU Swedish University of Agricultural Sciences, Alnarp 23053, Sweden
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Wang N, Jing B, Wang P, Wang Z, Li J, Pang S, Zhang Y, Ge M. Hygroscopicity and Compositional Evolution of Atmospheric Aerosols Containing Water-Soluble Carboxylic Acid Salts and Ammonium Sulfate: Influence of Ammonium Depletion. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6225-6234. [PMID: 30938517 DOI: 10.1021/acs.est.8b07052] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Water-soluble organic acid salts are important components of atmospheric aerosols. Despite their importance, it is still not clear how water-soluble organic acid salts influence interactions between aerosols and water vapor in the atmosphere. In this study, the hygroscopic behaviors and chemical compositions of aerosol particles containing water-soluble organic acid salt ((CH2) n(COONa)2, n = 0, 1, 2) and (NH4)2SO4 were measured using in situ attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). The ammonium depletion due to release of gaseous NH3 was found in mixed aerosols composed of (CH2) n(COONa)2 ( n = 1, 2) and (NH4)2SO4 upon dehydration. The ammonium loss could modify the aerosol composition, resulting in the formation of corresponding organic acid and monosodium dicarboxylate in mixed particles with high and low (NH4)2SO4 content, respectively. Due to the weaker hydrolysis of oxalate anions, the ammonium depletion was not observed for the Na2C2O4/(NH4)2SO4 mixtures. The changes in the particle composition led to the decreased water uptake upon hydration as compared to that upon dehydration. Our findings reveal that interactions between water-soluble organic acid salts and (NH4)2SO4 in aqueous aerosols may affect the repartition of NH3 between the condensed and gas phases, thus modifying composition and physicochemical properties of aerosols as well as relevant chemical processes.
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Affiliation(s)
- Na Wang
- School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Bo Jing
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , People's Republic of China
| | - Pan Wang
- School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Zhen Wang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Jiarong Li
- School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Shufeng Pang
- School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Yunhong Zhang
- School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Maofa Ge
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences , Xiamen 361021 , People's Republic of China
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Lovrić J, Duflot D, Monnerville M, Toubin C, Briquez S. Water-Induced Organization of Palmitic Acid at the Surface of a Model Sea Salt Particle: A Molecular Dynamics Study. J Phys Chem A 2016; 120:10141-10149. [DOI: 10.1021/acs.jpca.6b07792] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Josip Lovrić
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Denis Duflot
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Maurice Monnerville
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Céline Toubin
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Stéphane Briquez
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
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Fong BN, Kennon JT, Ali HM. Mole Ratio Dependence of the Mutual Deliquescence Relative Humidity of Aqueous Salts of Atmospheric Importance. J Phys Chem A 2016; 120:3596-601. [DOI: 10.1021/acs.jpca.6b02706] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bryant N. Fong
- Department
of Chemistry and
Physics, Arkansas State University, Jonesboro, Arkansas 72404, United States
| | - James T. Kennon
- Department
of Chemistry and
Physics, Arkansas State University, Jonesboro, Arkansas 72404, United States
| | - Hashim M. Ali
- Department
of Chemistry and
Physics, Arkansas State University, Jonesboro, Arkansas 72404, United States
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Dennis-Smither BJ, Hanford KL, Kwamena NOA, Miles REH, Reid JP. Phase, Morphology, and Hygroscopicity of Mixed Oleic Acid/Sodium Chloride/Water Aerosol Particles before and after Ozonolysis. J Phys Chem A 2012; 116:6159-68. [DOI: 10.1021/jp211429f] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Kate L. Hanford
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| | | | | | - Jonathan P. Reid
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
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Internally mixed sulfate and organic particles as potential ice nuclei in the tropical tropopause region. Proc Natl Acad Sci U S A 2010; 107:6693-8. [PMID: 20388912 DOI: 10.1073/pnas.0913018107] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cirrus clouds are ubiquitous in the tropical tropopause region and play a major role in the Earth's climate. Any changes to cirrus abundance due to natural or anthropogenic influences must be considered to evaluate future climate change. The detailed impact of cirrus clouds on climate depends on ice particle number, size, morphology, and composition. These properties depend in turn on the nucleation mechanism of the ice particles. Although it is often assumed that ice nucleates via a homogeneous mechanism, recent work points to the possibility that heterogeneous ice nucleation is important in the tropical tropopause region. However, there are very few studies of depositional ice nucleation on the complex types of particles likely to be found in this region of the atmosphere. Here, we use a unique method to probe depositional ice nucleation on internally mixed ammonium sulfate/palmitic acid particles, namely optical microscopy coupled with Raman microscopy. The deliquescence and efflorescence phase transitions of the mixed particles were first studied to gain insight into whether the particles are likely to be liquid or solid in the tropical tropopause region. The ice nucleating ability of the particles was then measured under typical upper tropospheric conditions. It was found that coating the particles with insoluble palmitic acid had little effect on the deliquescence, efflorescence, or ice nucleating ability of ammonium sulfate. Additional experiments involving Raman mapping provide new insights into how the composition and morphology of mixed particles impact their ability to nucleate ice.
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