Search results for “Solubility

About 10 results in articles

Open Access Pub publishes peer-reviewed, free-to-read open-access articles. Showing articles matching Solubility — open any to read the full text, or download the PDF or XML.

10 articles
Peptides Open Access

Peptide Synthesis in Aqueous Solution With a Reusable Solid Phase

Apr 2024

A procedure has been developed for synthesizing peptides in an aqueous solution with a reusable solid phase. Specifically designed linker molecule is employed to attach peptides to hydrophilic solid phases, enabling Solid Phase Peptide Synthesis (SPPS) in aqueous solutions. The linker molecule is utilized to connect peptides to an anionic exchange resin during peptide synthesis in an aqueous solution. The general structure of the linker molecule is Fmoc-AA-CH2-Ph-Rx-SO3-, the Fmoc (9-fluorenylmethoxycarbonyl) group serves as a protecting group for amino acids. Amino acids (AA) are linked to the solid phase through a structure of Methoxyphenylcarbonyl group, which is cleavable under strong acidic conditions. The sulfate group is present for forming an ionic bond with the solid resin in an aqueous solution. In this procedure, Fmoc-AA are utilized as building blocks for sequentially adding amino acids in peptide synthesis. Due to Fmoc-AA poor solubility in aqueous solutions, a procedure was developed to enhance the solubility of hydrophobic compounds, with a specific emphasis on dissolving Fmoc-protected Amino Acids (Fmoc-AA) in an aqueous solution. This enhancement facilitates SPPS in aqueous conditions with Fmoc-AA as building blocks. Cationic exchange resin, which is reusable, serves as the solid phase. Our research objective is to shift from the use of organic solvents to an aqueous system while maintaining the existing SPPS practices in organic solvents as closely as possible. This transition involves minimal alterations, maintaining consistency with the organic solvent system, except for the utilization of novel peptide linker molecule to hydrophilic solid resins that are commercially available. This approach is designed to facilitate a more readily acceptable transition for the peptide synthesis industry from using organic solvents to aqueous solution, contributing to greener and more sustainable synthetic methodologies.

Thin Film Deposition and Characterization Techniques

Apr 2022 DOI 10.14302/issn.2831-8846.j3dpa-22-4066

Thin films are everywhere in the modern world, with many of the technologies we depend upon in daily life being, in turn, dependent upon thin film technology. Chemical bath deposition includes principles of chemical bath deposition (CBD) and concept of solubility product, nucleation and film growth, thin film deposition mechanism in chemical bath deposition. The non-metallic ion source (anions) and metal ion source (cations) then react to form the compound. The nucleation process plays an important role in determining the crystallinity and microstructure of the resultant film. From the discussion of deposition techniques which are physical and chemical deposition methods. Physical deposition techniques contains sputtering deposition, electron beam evaporation and physical vapour deposition (PVD) process have been known for over 100 years and also fabrication films on the substrate, as well as the increasement of the pressure in the chamber due to operation of the sources indicates directly that gases or vapors are desorbed. Chemical deposition process is economically effective and has been industrially exploited to large scale. It can be summarized that thin film characterization techniques include X-ray diffraction (XRD), UV-Vis spectrophotometer, scanning electron microscopy, energy dispersive x-ray diffraction, transmission electron microscopy (TEM). X-rays diffraction (XRD) is a rapid and a powerful technique used to study the phase of a crystalline material, information on unit cell lattice parameters, crystal structure, crystal orientation and crystalline size.

Veterinary Healthcare Open Access

Generation of a Single-Domain Antibody against Isolated Escherichia Coli that Causes Camel-Calf Death

Mar 2021 DOI 10.14302/issn.2575-1212.jvhc-21-3767

Antibodies and antibody fragments, especially single-domain antibodies known as nanobodies, are important tools in diagnostics, research, and therapeutics. In a conventional antibody, light and heavy chains contribute to the formation of the antigen binding site. In addition to conventional antibodies, old and new world camels also have heavy-chain antibodies (hcAbs), which lack the light-chain antibodies that usually bind to the antigen, as well as single domain antibodies, the VHH domain, which are the smallest antigen-binding fragments and have high solubility, stability, and specificity. A VHH library against E. coli lipopolysaccharide (LPS) was produced using the camel immune system. E. coli strains from dead camel calves were isolated to extract the LPS and used to immunize a 2-year-old female camel. After isolating mononuclear lymphocytes for RNA extraction and amplification of the VHH gene, the PCR product was cloned into the pF1AT7 Flexi vector and transformed into JM109 E. coli competent cells by heat shock, resulting in a comprehensive VHHs library with 6.9 × 104 cfu/µg. The VHHs were expressed and screened with ELISA and PCR. Eleven colonies were positive by PCR, six of which were sequenced and submitted to Genbank compared with GenBank data to confirm the production of nanobodies with a similarity >90%.

Investigation on the Impact of Biofield Energy Treatment on the Physical, Thermal and Spectroscopic Characteristics of Zinc Chloride

Feb 2021 DOI 10.14302/issn.2328-0182.japst-21-3715

Zinc is an essential trace mineral that plays an important role in the human body as a regulator for different enzymatic systems. It is used in various supplements in the form of zinc chloride to meet the daily requirements. This study was designed with the aim to investigate the impact of The Trivedi Effect®- Energy of Consciousness Healing Treatment on the various physical, thermal, and spectral properties of zinc chloride. The study involves dividing the zinc chloride sample in two parts, followed by keeping the first part untreated and named it the control sample. Besides, The Trivedi Effect®- Biofield Energy Healing Treatment was provided to the other part remotely by the renowned Biofield Energy Healer, Mr. Mahendra Kumar Trivedi and the sample was termed as Biofield Energy Treated sample. Later on, both the samples were analyzed using PXRD, PSA, DSC, UV-Vis, and FT-IR analytical techniques. The PXRD analysis revealed the significant changes in the crystallite sizes (from -66.68% to 25.02%) and the relative peak intensities (from -81.35% to 141.22%) along with 26.46% decrease in the average crystallite size of the Biofield Energy Treated sample, compared with the control sample. Additionally, the treated sample showed reduction in the particle sizes d10, d50, d90, and D(4,3) values by 92.18%, 23.24%, 14.48%, and 29.31%, respectively as compared to the control sample. However, the surface area of the treated sample was observed to be significantly increased by 224.57%, compared to the control sample. The DSC analysis revealed slight increase in the melting and decomposition temperature of the Biofield Energy Treated sample by 0.84% and 3.62%, respectively; along with the significant increase in the latent heat of melting and decomposition by 24.85% and 123.23%, respectively, compared to the control sample. It showed that the thermal stability of the treated sample was significantly increased. However, the UV-Vis and FT-IR studies revealed that the structural properties of the control and treated samples were remained same. The overall study represents that The Trivedi Effect®- Energy of Consciousness Healing Treatment may be used to generate a polymorphic form of zinc chloride, which might possess enhanced solubility, dissolution and bioavailability profile along with improved thermal stability, compared to the control sample. Such properties of the treated zinc chloride may ensure its efficacy, stability and safety during the process of shipment, handling, and storage; thus, The Trivedi Effect®-Energy of Consciousness Healing Treated zinc chloride would be useful for designing the better formulation with enhanced bioavailability, stability and efficacy profile.

Consciousness Energy Healing Treatment: Impact on the Physicochemical and Thermal Properties of Pyridoxine HCl

May 2019 DOI 10.14302/issn.2379-7835.ijn-19-2831

Pyridoxine HCl plays an important role in the human body as a coenzyme in the synthesis process of amino acids and neurotransmitters such as serotonin, norepinephrine, aminolevulinic acid, sphingolipids, etc. The objective of this study was to determine the effect of the Trivedi Effect®-Consciousness Energy Healing Treatment on the various physicochemical and thermal properties of pyridoxine HCl using various analytical techniques such. The study plan involved dividing the pyridoxine HCl sample into two parts, in which, the first part was not given any treatment (control sample), while the second part was provided the Consciousness Energy Healing Treatment by a renowned Biofield Energy Healer, Gopal Nayak and named as the Biofield Energy Treated pyridoxine. The particle size values of the treated pyridoxine was altered by -19.51% (d10), -11.92% (d50), 2.46% (d90), and -2.44% {D(4,3)}; whereas, the surface area was significantly increased by 18.92%, compared to the control sample. The powder X-ray diffraction data showed the remarkable increase in the peak intensities and crystallite sizes of the treated pyridoxine in the range from 8.81% to 21.57% and 9.64% to 17.85%, respectively compared to the control sample. Moreover, the treated pyridoxine also showed an increase in the average crystallite size by 13.69%, compared to the control sample. The total weight loss of the treated pyridoxine was significantly reduced by 13.35% during the thermal degradation; however, the residue weight was increased by 29.48% after degradation, in comparison to the control sample. The maximum thermal degradation temperature of the treated pyridoxine corresponding to 1st and 2nd peak was altered by 4.37% and 2.24%, respectively than the control sample. The latent heat of fusion of the treated pyridoxine was significantly increased by 5.89% compared to the control sample. Hence, it was assumed that the Trivedi Effect®-Consciousness Energy Healing Treatment might form a new polymorph of pyridoxine HCl that might be helpful in designing more efficacious pharmaceutical/nutraceutical product due to its better solubility, absorption, bioavailability, and thermal stability than the untreated sample.

Consciousness Energy Healing Treatment: Spectroscopic and Calorimetric Evaluation of the Biofield Energy Treated Hydroxypropyl β-Cyclodextrin

Feb 2019 DOI 10.14302/issn.2377-2549.jndc-18-2507

Hydroxypropyl β-Cyclodextrin (HPBCD) used in food, pharmaceutical, chemical industries, as well as environmental, and agriculture engineering. But the major issue related to HPBCD is the low solubility profile. In this study, the influence of the Consciousness Energy Healing Treatment (the Trivedi Effect®) on the physicochemical properties of HPBCD was evaluated using spectroscopic and calorimetric analytical techniques. The test sample (HPBCD) was divided into control sample and treated sample. The control sample did not receive the Biofield Energy Treatment. Whereas, the treated sample received the Biofield Energy Treatment remotely by a renowned Biofield Energy Healer, Dahryn Trivedi. The particle size values of the treated sample were decreased by 3.28%(d10), 1.36%(d50), 0.45%(d90), and 1.04%{D(4,3)}; therefore, the specific surface area was increased by 1.9% compared with the control sample. The evaporation temperature of the treated HPBCD sample was significantly decreased by 19.89%; however, the latent heat of evaporation and latent heat of fusion were significantly increased by 56.27% and 47.41%, respectively compared with the control sample.The total weight loss in the treated HPBCD was decreased by 5.11%; whereas, the residue amount was significantly 309.67% more compared to the control sample.The results indicated that the Trivedi Effect® might have produced a new form of HPBCD which may show better thermal stability, solubility, dissolution rate, and bioavailability. This new form of HPBCD would be more useful for improvement of solubility of the lipophilic drug, preparation of cholesterol free food products, weight loss supplements, anti-obesity medication, stabilize volatile and unstable compounds, and other manufacturing industry using it as a raw material.

Consciousness Energy Healing Treatment: Impact on the Physicochemical and Thermal Characteristics of Folic Acid

Oct 2018 DOI 10.14302/issn.2379-7835.ijn-18-2419

Folic acid is essential in the body for the production of DNA and also plays various vital functions within the body. This study on folic acid was done to analyze the results of the Trivedi Effect® on its physicochemical and thermal properties with the help of analytical techniques. The method involves dividing the test sample into two parts. The first part was termed as a control sample, and no treatment was given to it; while the second part received the Biofield Energy Treatment remotely by a renowned Biofield Energy Healer, Gopal Nayak and termed as the treated sample. The study revealed that the particle sizes reduced by 7.01% (d10), 6.53% (d50), 8.37% (d90), and 15.99% {D(4,3)}, thus increased the surface area by 1.72%, in the treated sample compared with the control sample. The PXRD data showed changes in the peak intensities and crystallite sizes ranging from -36.81% to 113.41% and -15.79% to 318%, respectively, thus increased in the average crystallite size by 22.55% of the treated sample compared with the control sample. The TGA analysis of the treated sample revealed a 3.94% increase in total weight loss that resulted in the remarkable reduction in the residual amount by 14.99%, in comparison to the untreated sample. The latent heat of fusion (ΔHfusion) and latent heat of decomposition (ΔHdegradation) were significantly altered by -10.33% and 10.46%, respectively in the treated sample compared to the untreated sample. The study denoted that the Biofield Energy Treatment is a novel approach that could be used to develop some polymorph of folic acid and that might improve its solubility, dissolution, and bioavailability in comparison to the control sample. Hence, the treated folic acid in the nutraceutical/pharmaceutical formulations might be useful concerning better drug performance and efficacy.

Impact of Consciousness Energy Healing Treatment on the Physicochemical and Thermal Properties of Silver Oxide

Oct 2018 DOI 10.14302/issn.2328-0182.japst-18-2314

Silver oxide (Ag2O) has the antimicrobial properties, which is insoluble in most of the solvents and sensitive to light. Therefore, this study was performed to evaluate the impact of the Trivedi Effect®-Consciousness Energy Healing Treatment on the physicochemical and thermal properties of Ag2O powder using modern analytical techniques. The Ag2O sample was divided into two parts, one part of the sample was considered as the control sample, whereas the other part of the sample received the Biofield Treatment remotely by a renowned Biofield Energy Healer, Dahryn Trivedi and termed as a treated sample. The particle size values were significantly decreased by 26.70% (d10), 20.67% (d50), 18.7% (d90), and 20.57% D(43), hence, the specific surface area was significantly increased by 32.33% in the treated Ag2O sample than control sample. PXRD peak intensities and crystallite sizes were significantly altered from -94.93% to 6.18% and -54.19% to 54.89%, respectively, however, the average crystallite size was significantly decreased by 14.66% in the treated sample compared with the control sample. The latent heat of fusion of the treated Ag2O was significantly decreased by 61.12% compared with the control sample.The total weight loss was significantly increased by 49.34%, hence, the residue amount was 4.05% less in the treated sample than the control sample.These results suggested that the Trivedi Effect® might introduce a new polymorphic form of Ag2O which would offer better solubility, absorption, and bioavailability of the pharmaceutical formulations and also be advantageous for the pharmaceutical industry when using it as a raw material.  

Evaluation of the Effect of Consciousness Energy Healing Treatment on the Physicochemical and Thermal Properties of Selenium

Sep 2018 DOI 10.14302/issn.2377-2549.jndc-18-2315

Selenium is an essential micronutrient required for healthy metabolism, as well as prevention, and treatment of selenium deficiency diseases. The experiment aimed to evaluate the influence of the Trivedi Effect®-Consciousness Energy Healing Treatment on the physicochemical and thermal properties of selenium using modern analytical techniques. The selenium sample was divided into two parts, one part of the test sample was called the control sample, while the second part of the test sample received the Biofield Treatment remotely by a renowned Biofield Energy Healer, Gopal Nayak, and was called the treated sample. The particle size values were significantly decreased by 37.69% (d10), 14.36% (d50), 4.31% (d90), and 11.58% D(43), hence, the specific surface area was significantly increased by 33.64% in the treated sample compared to the control sample. The PXRD peak intensities and crystallite sizes were significantly altered ranging from 5.23% to 100% and 75% to 111.7%, respectively; whereas 7.81% significantly decreased the average crystallite size in the treated sample than the control sample. The latent heat of fusion of the treated sample was significantly increased by 12.37% compared with the control sample.The results suggested that the Trivedi Effect® might generate a new polymorphic form of selenium which would offer better solubility, bioavailability and be thermally more stable compared with the control sample. The Biofield Treated selenium would be more useful to design novel nutraceutical/pharmaceutical formulations and might offer an enhanced therapeutic response against cardiovascular disease, cancer, neuromuscular disorders, diabetes, stress, aging, male infertility, viral diseases, degenerative ailments, etc.

Evaluation of SterculiaUrens Gum as Novel Carrier for Oral Colon Targeted Drug Delivery System

Nov 2013 DOI 10.14302/issn.2328-0182.japst-12-119

The purpose of the research is to evaluate Sterculiaurens gum as a carrier for oral colon targeted drug delivery system. Sterculia gum has been reported to have wide pharmaceutical applications such as tablet binder, disintegrant, gelling agent and as a controlled release polymer, but it has not been exploited as colon targeting carrier. For evaluation as a carrier for colonic delivery of drugs characterization of gum was done. Microflora degradation studies of gum were conducted in phosphate buffer solution (PBS) pH 7.4 containing rat caecal content under anaerobic environment. Solubility, swelling index, viscosity and pH of the polymer solution were determined. Different formulation aspects considered were: gum concentration (10–40%), concentration of citric acid (10–30 %) on swelling index and in-vitro drug release. The results of the isothermal stress testing (IST) shows no degradation of samples of model drug, azathioprine, in the drug polymer mixture and the core tablet excipients. DSC and FT-IR study has proved the compatibility of the drug with Sterculia gum and other tablet excipients. Microflora degradation study revealed that Sterculia gum can be used as tablet excipient for drug release in the colonic region by utilizing the action of enterobacteria. Sterculia gum exhibits premature drug release in the upper GIT without enteric coating and may not reach to the colonic region. From the study, Sterculia gum as colon targeting carrier is possible via coating with chitosan/Eudragit mixed blend polymers which would provide acid as well as intestinal resistance; but undergo enzymatic degradation once it reaches the colon.

Frequently asked questions

Are these articles peer-reviewed?
Yes. Articles published at Open Access Pub go through single-blind peer review (double-blind on request) under an editorial board before publication.
Are the articles free to read?
Yes. Every article is open access — read the full text online for free and download the PDF or XML, with no paywall or subscription.
How do I cite an article?
Use the DOI shown on each result and on the article page; it is the permanent, citable link to the article.
How do I read or download an article?
Click "Read full text" to open the article HTML, or use the PDF / XML buttons on each card to download it.