Biopolymers - Science topic

Bacterial biopolymers are a hot topic for innovation, and many patents have been filed covering their production, application, and extraction methods. Does anyone published patents on bacterial biopolymers? Please, discuss it! We want to learn!

I have synthesized a film containing biopolymer(Soluble in DMSO) and TiO2 nanoparticles what solvent would be perfect to dissolve it ?

I saw a lot of research showing the application of DNA as starting material for synthesis of patterned DNA hydrogels or nucleospheres that utilize the self-complementarity of custom designed synthetic oligonucleotides to form such nano and microstructures (1). Another technology exists which uses DNA along with metal ions to form particles through coordination driven self assembly (2). Researchers have also shown the application of such DNA origami structures constructed from custom oligonucleotides and phage DNA in orthotopic tumor-bearing mice models for efficient drug delivery (3).

I am curious to know if we can isolate DNA from other cells (Plants/bacteria/mammalian) and use it to generate such DNA micro or nanoparticles that could have drug delivery applications. What would be the limiting factors in this ?

1.

2. Engineering multifunctional DNA hybrid nanospheres through coordination-driven self-assembly. https://doi.org/10.1002/anie.201810735

3.

if we use an organic solvent how we will distinguish that the toxicity is due to the plastic not due to the solvent used. Please guide

Actually i want to know if i have grafted one biopolymer to another derivatized biopolymer and then reinforced metal nanoparticles into it , then what factors should be remind to draw a chemical reaction for this ?

Dear scientific writer ,,i want a suggestion i have submitted a review on synthesis and derivatization of biopolymer ,,editor ask me to add characterization in it from previous study ,,so guide me how i cam make my articles effective with this ?

I am thrilled to share our latest project with Frontiers which is up and running. Together with Dr. Bárbara Tomadoni, Dr. Antonio Guerrero and Dr. Norma Marcovich, we are leading a Research Topic on "Sustainable Active Packaging for Food Safety and Preservation: Technological, Consumer, and Environmental Perspectives". You can read more here 👉 https://www.frontiersin.org/research-topics/65159/sustainable-active-packaging-for-food-safety-and-preservation-technological-consumer-and-environmental-perspectives We look forward to your contribution if you are working on sustainable active packaging! 🤝 📆 Summary submission deadline: 22 September 2024 📆 Manuscript submission deadline: 10 December 2024 hashtag#biodegradable hashtag#packaging hashtag#foodquality hashtag#foodsafety hashtag#biopolymers hashtag#sustainability

I am currently processing a peritoneal dialysis solution with 7.5% icodextrin and would like to verify whether its concentration remains the same post-processing or decreases, whether slightly or significantly. How can I quantify icodextrin in an aqueous solution?

As icodextrin is a polysaccharide/glucose biopolymer, could I use HPLC-RID for this purpose? The intended mobile phase is 80% acetonitrile water, and the column proposed is Lichrospher® 100 NH2 Purospher® STAR NH2 5um, suitable for carbohydrates (mono-, di-, and oligosaccharides).

I want to know the method of sample preparation in ppm.

I'm interested in submitting a research proposal to the call 2025 "Egypt-France Imhotep Mobility Project." Therefore, I'm looking for a French collaborator who specializes in material science, environmental science, nanoparticles, or biopolymers. I would appreciate it if anyone could help me with this.

I need more articles on kaolinite clay and the same clay treated by number of geotechnical methods

I want to prepare a starch encapsulated nano clay biopolymer composite where i can add micronutrients such as Molybdenum, Zinc and primary nutrient potassium. Moreover, I also want to add microorganism Arthrobotrytis oligospora to it. Please suggest me the standard procedure for doing such activities?

What concentration(w/v) should prepare for take this spectra?

What works describe these methods? Thank you!

Cellulose is a highly desirable biopolymer which has many applications in modern technologies. But, cellulose has lignin and hemicellulose which is undesirable for applications like energy harvesting. So, how do we remove these materials from cellulose?

Anyone Can suggest me Lignin Bio-polymer application and its uses or any research which is currently happening in Lignin Nano-particles or lignin nano-composites materials in human welfare and in drug delivery.

TiO2 contents are dependent on room temperature optical transmittance (in the UV-Vis region) of different PLA nanocomposites with the neat PLA film. Optical transmittance of polymer-based biodegradable films is significant for sundry industrial applications, especially in food packaging where the attractiveness of the food by customers potentially depends on the aesthetic view by naked eyes under visible light illumination.

What polymers containing phosphorus are used in maxillofacial surgery? List all such polymers. Thank you!

What 3D polymers with carbon, oxygen and phosphorus, but without hydrogen, are used in maxillofacial surgery?

Dear Colleagues,

The growing need for food production through sustainable cultivation practices, without reducing crop yield and producer income, is a major objective due to increased environmental pollution and the gradual degradation of cultivated soils. Various compounds with bioactive properties can be utilized as biostimulants to boost plant growth and development under normal and stressful conditions. So far, six distinct categories of biostimulants have been recognized, including microbial inoculants; humic substances, such as humic and fulvic acids; protein hydrolysates and amino acids; biopolymers; inorganic compounds; and seaweed extracts, all of which are commercially available with wide applications in agriculture. The most important biostimulant effects on crops are the acceleration of crop establishment, the improvement in nutrient uptake and nutrients use efficiency, the induction of tolerance to biotic and abiotic stressors, the improvement in seed germination, the increase in shelf life of perishable products, the reduction in nutrients leaching, the improvement in root development, the removal of heavy metals from contaminated soils, the improvement in crop performance, the stimulation of the immune system of plants, the improvement in visual quality of final products, and the induction of the biosynthesis of plant defensive biomolecules. Different classification approaches have been suggested so far, based either on the origin of each biostimulant, such as biological or non-biological, microbial and non-microbial, or on the mode of action which divides biostimulants into phytohormonal and non-phytohormonal ones.

This Special Issue focuses on the roles and functions of different types of biostimulants on different agricultural and horticultural crops within the framework of sustainable crop management, aiming to gather critical and important information regarding their positive effects on plant growth and final yield, as well as their impacts on the quality of the final product. Furthermore, the major limitations of these practices as well as the future prospects of biostimulant studies will be presented.

Keywords= biostimulants; chitosan; arbuscular mycorrhizal fungi; amino acids; organic farming; vegetable crops; horticultural crops; microbial biostimulants

(Guest Editor

Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China Interests: organic agriculture; crops; biostimulants; horticulture; forage crops; soil science; sustainable agriculture)

**Prof. Dr. Spyridon A. Petropoulos

Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, 38446 Volos, Greece Interests: organic agriculture; agrobiodiversity; vegetable crops; biostimulants; horticulture; fruit quality; wild edible species; essential oils; medicinal and aromatic plants; stress physiology; bioactve compounds Special Issues, Collections and Topics in MDPI journals)

Hi all,

I have been reading about quantification methods of sericin and fibroin. There are methods reported like FTIR, BCA, amino acid hydrolysis etc. I don't understand how it relates to exact sericin/fibroin titers in an isolate.

Does any body know of using or read about methods that are more accurate like ELISA or western for quantification of sericin or fibroin in protein isolate?

This the XRD Spectrum of the polymer being carbonized.

I prepare a chitosan solution in acetic acid (0.5 M). Some of the small threads are remained in the solution. In literature it is reported that solution is filtered before using. I want to know which filter is suitable for the filtration of chitosan solution?

Thanks

Cigarette butts are one of the most poisoning (watersoluble nicotin an many others) waste problems for water and soil on earth. This is the toxic aspect of butts. The sencond heavy aspect is the possible degradation to microplastic of the biopolymer Cellulse acetate of the filter. Does anybody know or find scientific work regarding this microplastic state of CA during biodegradation?

Your detailed answer would be appretiated most.

Peter

A while ago I did research on arabinoxylan gels using maize arabinoxylans sourced from Cambridge Biopolymers Ltd (UK). I would like to pursue this work further (and include mixed linkage glucans), but I find that the company has closed. Can anyone tell me if there are other companies which sell similar materials (preferably in the UK)?

Dear scientists

Which type of dialysis membranes are preferable to use with chitosan and biopolymers ?

Can be used one more time these membranes?

Electrospinning

Bacterial cellulose (BC) is a natural biopolymer metabolized by Gram-negative bacteria strains in Carbon- and Nitrogen-rich media. Due to its natural purity and biodegradability it is considered to be an exceptional biomaterial with versatile scientific and commercial applications. Due to such a prominent potential use, further studies on such kind of materials should be established. Thus, what are the potential methods to study mechanical, molecular and structural properties of bacterial cellulose-based composites?

Thanks for any kind of your ideas and thoughts.

I am trying to prepare drug-loaded porous silica nanoparticles coated with biopolymers. I want to tag some targeting ligands and some molecules. I wanted to know if the functionalization should be done on the surface of the coated biopolymer or the silica nanoparticles?

in downstream processing of biopolymer some quantity of protein still remains even after treating enzymatically which are known for protein removal.

looking for complete removal of protein from polymer, please suggest commercially feasible options.

protein source is bacteria whose outer layer consist of lipids and protein

Chitosan is a natural biopolymer with antibacterial properties and the solution of chitosan is prepared in acetic acid. So, has acetic acid any effect in contributing towards the antibacterial behavior of chitosan?

I obtained an EIS data when I am doing research on biopolymers for corrosion inhibition. But I can not find a good fit of equivalent circuit. Could any body help me with it?

I have attached the data file in which the first column is the frequency, the second column is the Z' and the third column is the Z''.

I am relatively new to DSC. Recently, I ran DSC on starches but always got this broad endothermic peak which I could not explain. Please see the attached isotherm of a starch sample and my method is listed below.

1: Equilibrate at -50.00°C

2: Ramp 20.00°C/min to 220.00°C

3: Mark end of cycle 0

4: Isothermal for 5.00 min

5: Ramp 5.00°C/min to -80.00°C

6: Mark end of cycle 1

7: Ramp 15.00°C/min to 200.00°C

8: Mark end of cycle 2

9: End of method

Hello, we want o make biopolymer composite wires using 3D printing (using our solution and not a ready filament of course) and I wonder which biopolymer or even a plasticizer is recommended in order to get ductile wires. Most of what we produce is brittle wires for now. Thanks in advance.

Hello all, I am looking for a model drug to encapsulate into a biopolymer. It should be soluble in acetone but it should not dissolve in ethanol. I will appreciate it if you have any suggestions.

Thanks in advance.

So far, when I looked on molecular docking papers, it often involves using a protein as the receptor molecule, with ligands like another protein, nucleic acids, or small molecules. I have also found the application of RNA or DNA as the receptor molecules, docked against another RNA or DNA, and small molecules. However, I never (yet) found a paper referring of using other polymers as receptor molecules, like lipid or nanocarrier polymers (like chitosan or cellulose or even carbon nanotube). Is there a reason that nobody does that? Or some research groups have already done that? I am just curious.

Most of the 3D printing resins are synthetic chemicals. Is there any biopolymers to replace resins. If so kindly share some lietrature and suggestion for using biopolymers for 3D printing

Anyone tell the current trend in edible films and coatings? Hydrogel can be used for making films

The Flory-Huggins theory (1942) has been widely used to account for the mixing energy between long-chain, flexible polymers (e.g., rubbers) and solvents. Can it be used for semi-flexible and rigid biopolymers like actins, microtubules, fibrins, and collagens?

I am blending PBAT and PLA using extrusion machine. However, the PLA/PBAT blended pellets start to agglomerate, and fail to pass along the screw, as soon as I introduce the pellets in extrusion film blow machine! Is this pellets agglomeration issue common in PBAT~based blends?

Hello, I am trying to find the solution for the adsorption energy calculation of polymer with any of the chemicals or metals, for this calculation, I am using the adsorption locator module of the material studio. Since I am using biopolymer so there are no such reference for adsorption locator is available.

How can we validate these results, or is there any specific adsorption energy range available that validates our result?

Does anyone have done adsorption calculation for chemical-polymer interaction from the material studio?

Chitosan precipitation

concentration: 1and 2 %w

Solvent: deionized water

Storage time: 1 or a few days

Also a layer of mold can be see on it.

The material is a biopolymer (biomass) The broad peak I think is an OH peak suggesting an intermolecular hydrogen bonding interaction normally observed in homopolymers and copolymers. but the shoulder around 3249 I got no explanation.

I am trying to dissolve chickpea protein isolate in water but it's not soluble even with raised temperature and constant shaking. Can anyone please suggest the appropriate method or solvent other than water in which chickpea protein isolate gets completely soluble.

i prepared 1%wt and 2%wt sodium alginate solution with 9 pH and 0.5 molar copper sulfate.

by adding alginate solution to the electrolyte (CuSO4), it is expected to have copper alginate gel in bead form. but i gained very thin very loose small film.

and by adding the electrolyte on the surface of the alginate solution, it is expected to have a thick stable membrane of copper alginate gel that will stay on the surface, but my membrane sinks in alginate solution slowly.

my main purpose is making capillary copper alginate gel.

thank you

At the moment of meassuring a polymer viscosity which one would you recomend? reomether, digital viscosymeter or glass viscocymeter.

It's for a biopolymer in solution that's is undergoing electrospinning.

what are the effects of the Simulated Body Fluid (SBF) corrosion solution on the stress and Elongation of biopolymers?

Best regards.

RAMAN SPECTROSCOPY?

MS SPECTROMETRY?

In classical biotechnology, three stages are distinguished: pre-fermentation, fermentation, post-fermentation. Typical equipment used in biotechnological industries is known. Are there any features in the hardware design of biopolymer production, such as proteins (enzymes), polysaccharides (starch, cellulose), lipids (lipids of microalgae)?

Hello all,

I have a two graph ( TGA and DSC) of a biopolymer that I see decomposition starts around 170C. However once I run the DSC I do not see any melting or crystallization peak. Why?

I want some information specially some papers about chitosan biopolymer and the industerial methods to get it from shrimp shell

I would like to know if the properties of a polymer impact on the size of the particle it forms. I'm working with different polyssacharides (alginic acid from different seaweed), which are precipitated by the exact same method. Is it to be expected that the mean particle size of the polymers are different (because of molar mass, polydispersivity, monomers ratio, polarity - one of them has high hydroxyl content -, branching...)? Or is the particle size normally an exclusive function of the process and not the chemical nature of the material?

I am looking for polymers/biopolymers with high hydrophobicity and high gas permeability. Can any one recommend any types of polymers/biopolymers?

I wanted to know about the journal with a high rate of acceptance and sci index.

Dear Researchers,

Please, which papers, sites, tools, or programs you recommend to use in the design and selection of the best materials for prosthetic leg liners?

Regards,

Akram

I tested several non-traditional soil stabilizers (e.g. ligninsulfonate, biopolymers) with two different concentrations. The standard Proctor test showed that the additives reduced the OMC and increased the MDD of the soil. Further, the data indicated that an increase in concentration reduced and increased the MDD, respectively, decreased and increased the OMC. How can this behaviour be explained?

What chemical bond is created by the Boron nitride/biopolymer on copper substrate to prevent copper deterioration? kindly give an explanation.

i want potassium nitrate to be get crosslinked to biopolymer..so weather pot.nitrate will be partially dissolve in ethanol or not?if yes den weather crosslinking will be done in partially dissolve solvent?

I have a liquid polyanhydride that is not soluble in water made from succinic acid and ricinoleic acid and I need to make it a hard gel. Investigating I found that it is possible to do this by crosslinking, however, this is carried out with polymers such as cellulose or dextran and crosslinkers such as citric acid or glutaraldehyde are used, which are soluble in water.

My question is whether it is possible to carry out crosslinking using these water soluble agents, and if not, what crosslinking might serve and what method of crosslinking would be appropriate?

I have been trying hard for a month to observe some definite structure of the biopolymer which was synthesized by our lab. The irony is it cannot be dissolved in any organic solvent and we are left only with some aqueous buffer for our studies.

Since SEM requires solid samples i highly doubt to see anything under it except for some random aggregates.

Even in regular TEM I can only see indefinite aggregations of polymer. I have tried staining as well which in some instances effected polymer structures, like i have seen some nano vesicles but those were not the representative of the sample.

Please dont recommend cryoTEM because we are struggling hard to get the dates, but chances are not likely.

Need Help!

I have a liquid polyanhydride that is not soluble in water made from succinic acid and ricinoleic acid and I need to make it a hard gel. I think I can cross-link using ethylenediamine, but I'm not entirely sure. How can I cross-link with ethylenediamine or some other substance?

I would like to lubricate the PLA with a plasticizer while without compromising the PLA compostability.

Your suggestions/comments are highly appreciated in advance.

Cheers

Raj

Dear all,

I have coated MnCO3 microparticles with different biopolymers through Layer-by-layer approach.

I am not sure how to analyze the sample under SEM.

I fear sputtering might damage the coating.

My sample is in powder form.

Thanks in advance

Other than extraction of PHA from bacterial cells are there any other methods to quantitatively analyse PHA

My high school Bio-Inspire Design students are trying to develop a waterproof/resistant biopolymer film for marine applications. Their curious about PLA and wonder if there's a low tech way to make it without the use of many chemicals or fancy equipment.

My biopolymer film is not sealing it is becoming chared or it is pealing out weather can I use any food grade glue to stick them

Interested in polymers that are soluble in small organic acids such as citric, etc. I know that citric acid is used as a cross-linking molecule for making biopolymers. But am interested in polymers that are soluble in 2C and 3C organic acids.

For my thesis research, first, I mix PLA (solvent: chloroform/methanol) and PCL (solvent: chloroform/methanol) for 2-3 hours. After that, I want to mix PLA/PCL with PMMA (mW 350.000 solvent: ethyl acetate). How long does it take to mix PLA/PCL with PMMA perfectly? Thank you.

Natural gums such as Arabic gum have low molecular weights. However, they are available as natural products. Is it possible to add a chemical to form stable polymeric gums with a very high molecular weight just like Polyacrylamide that is used in EOR applications?

Greetings! I have a research where I dissolve PLA in chloroform:methanol (3:1) for 3 hours and also PCL in chloroform:methanol (3:1) for 3 hours too. After that, I have to blend those two polimers together with magnetic stirrer. The question is, how long does it take to blend the solution of PLA and PCL with magnetic stirrer around 300 rpm? It would be better if you could refer your answer with journal. Thank you in any advance.

Hello,

I made 2% xanthan gum solution and measured its viscosity while increasing temperature of the solution.

I guess viscosity of the solution should be decreased while heating, due to degradation of the polymer, according to the previous researches.

But I found that viscosity of my xanthan solution had increased continuously while heating and then suddenly dropped down quickly at 95'c.

Do you think it's normal to have the viscosity increasing while heating??? I want to know why it increases....

Please help! :"(

(+) I made the solution with 80'c water while stirring vigorously and homogenized for 15min at 5000rpm. So I assume all the dry xanthan powders were solublized enough.....

Any recent research on biopolymers application in surface protection against miro & microorganism and algal deposition?

I am looking for a good book publisher for one of my book chapter related to biopolymer hydrogels having scientifically a broad scope and also a ISBN. If someone has experience in the same or related area or any general advise is more than welcome!

Thanks

M. Khan

Fatty acids are known to act as building blocks for various biopolymer synthesis. Can we use microbial biodiesel for such purpose?

I have synthesized Phthalated chitosan, now want to calculate its degree of substitution, is their any method available for calculating degree of substitution by UV spectrphotometry or Tirimetry????

Please help me out.....