Acid Hydrochloride Research Articles

Metformin Carbon Dots for Promoting Periodontal Bone Regeneration via Activation of ERK/AMPK Pathway.

The osteogenic potential of mesenchymal stem cells (MSCs) is severely impaired under persistent inflammation of periodontitis. A highly efficient way to promote or rescue osteogenic potential of MSCs under inflammation remains an unmet goal. Herein, metformin carbon dots (MCDs) with excellent biocompatibility are prepared from metformin hydrochloride and citric acid via a hydrothermal method. The MCDs can more effectively enhance the alkaline phosphatase (ALP) activity, calcium deposition nodules formation, expression of osteogenic genes and proteins in rat bone marrow mesenchymal stem cells (rBMSCs) than metformin under both inflammatory and normal conditions. Moreover, a novel pathway of extracellular signal-regulated kinases (ERK)/AMP-activated protein kinase (AMPK) signaling is involved in the MCDs-induced osteogenesis. In periodontitis rats, MCDs can effectively regenerate the lost alveolar bone, but not the metformin. Taken together, MCDs can be the promising candidate nanomaterial for periodontitis treatment. This work may provide a new pharmacological target of ERK/AMPK pathway for treating bone loss and also give additional insights into developing nanodrugs from the numerous medications.

Detecting cancer cells with a highly sensitive LbL-based biosensor

Early diagnosis of cancer is crucial for therapeutic methods to be more effective and to decrease the mortality rate due to this disease. Current diagnostic methods include imaging techniques that require expensive equipment and specialized personnel, making it difficult to apply them to many patients. To overcome these limitations, many biosensors have been developed to monitor cancer biomarkers. Here, we report on the electrochemical biosensor for selective detection of tumor cells using a simple and low-cost methodology. Layer-by-layer (LbL) self-assembly was used to modify indium tin oxide (ITO) electrodes with alternating layers of polyallylamine hydrochloride (PAH) and folic acid (FA), which binds to overexpressed folate receptors alpha (FRα) in tumor cells. The LbL-based biosensor showed high sensitivity in detecting cervical cancer cells (HeLa cells) using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). A linear dependence with the logarithm cell concentration was observed and excellent detection limits were found, 4 cells mL−1 and 19 cells mL−1 for EIS and CV measurements, respectively. The developed biosensor also presented great reproducibility (RSD = 1.7%) and repeatability (RSD = 1.8%). The selectivity was confirmed after the biosensor interaction with healthy cells (HMEC cells), which did not produce significant changes in the electrochemical signals. Furthermore, it was demonstrated that selective detection of tumor cells occurs via an interaction with FA. The LbL-based biosensor provides a simple, accurate, and cost-effective platform to be applied in the early diagnosis of cancer.

Formulation Development and Evaluation of Fast Dissolving Films of Oloptadine HCl

Our studies on the performance of formulation development and evaluation of fast dissolving films of Oloptadine HCL its anti-allergic drug. Prepare mouth dissolving film of Oloptadine HCl by solvent casting method. To characterize the prepared mouth dissolving film of Oloptadine HCL in terms of— Thickness, percent elongation, tack test, swelling index, in-vitro disintegration time and dissolution test. Oloptadine OLO), 11-[{z}-3-(Dimethlamino) propylidene]-6-11-dihydrobenz [b, e] oxepin-2-acetic acid hydrochloride, is widely used as an antihistaminic. Oloptadine HCL is a relatively selective histamine H1-receptor antagonist that inhibits the release of histamine from mast cells. Oloptadine does not affect alpha-adrenergic dopamine, muscarinic type 1 and 2 or serotonin receptor. They are hydrophobic in nature and non-polar, sparingly soluble in water and freely soluble methanol, ethanol. Olopatadine HCl is a mouth dissolving film. We is trying to sort out the problem of allergic. They are rapidly onset of action, when placed upon the tongue that it is disperse rapidly swallowing within 3-5 seconds without need of water or chewing.

An insight into device performance and hysteresis in dye-sensitized solar cell using 5-aminovaleric acid and 5-aminovaleric acid hydrochloride as electrolyte additives

Electrolyte additives in dye-sensitized solar (DSSC) were used to improve the overall device performance. However, the improvement in one device parameters is usually accompanied with a decay in another. Besides, hysteresis phenomena in DSSC are rarely discussed in when additives are used. Hysteresis calculations and analysis is inevitable to understand how the device behave and how accurately measure the performance. Here, I study the device performance and hysteresis before and after using 5-aminovaleric acid (5-AVA) and 5-aminovaleric acid hydrochloride (5-AVAHCl). These two additives seem similar in chemical structures, but both have totally different effect in device performance and hysteresis. Both additives improve all device performance parameters, JSC, VOC, and FF because they have dual effect. One effect is to increase the ionic conductivity of electrolyte by producing excess of iodide ions (I-) and the other is anchoring to TiO2 surface leading to lower electron recombination at TiO2/electrolyte interface. The optimum 5-AVA and 5-AVAHCl concentration is 0.1 mM. Hysteresis is significant in DSSCs fabricated with electrolyte containing 5-AVAHCl.

Activation of oil palm empty bunches with hydrochloride acid & phosphoric acid and characterization based SNI No. 06-3730-1995

Activated carbon is a solid product resulting from carbonization and activation of lignocellulosic biomass by several methods and activators. Each activator can produce different characteristics of activated carbon. The activated carbon of Oil Palm Empty Fruit Bunches (OPEFB) is processed from Empty Fruit Bunches (EFB) waste, which is quite abundant in Indonesia. The purpose of this study was to determine the characteristics of OPEFB carbon that had been chemically activated using hydrochloric acid (HCl) and phosphoric acid (H3PO4) based on the Indonesian National Standard (SNI) No. 06 - 3730 - 1995. The research method consisted of the process of carbonization of OPEFB using a pyrolysis device at 400oC for 6 hours; activation of carbon with activator HCl and H3PO4 at various activator concentrations; characterization of activated carbon on the parameters of moisture content, ash content, absorption of iodine, and absorption of methylene blue. The results showed that the 0.5000 M HCl was the best activator that produced the quality of OPEFB activated carbon according to SNI 06 - 3730 - 1995 on parameters of moisture content, ash content and absorption of iodine.Keywords: Activated Carbon, Iodine Absorption, Oil Palm Empty Fruit BunchesABSTRAKAktivasi karbon tandan kosong kelapa sawit dengan asam klorida dan asam fosfat serta uji karakterisasi berdasarkan SNI No. 06–3730–1995Karbon aktif merupakan produk padatan yang dihasilkan dari karbonisasi dan aktivasi biomassa lignoselulosa dengan beberapa metode dan aktivator. Masing-masing aktivator dapat menghasilkan karakteristik karbon aktif yang berbeda. Karbon aktif Tandan Kosong Kelapa Sawit (TKKS) diolah dari limbah TKKS yang keberadaannya cukup melimpah di Indonesia. Tujuan penelitian ini adalah mengetahui karakteristik karbon TKKS yang telah diaktivasi secara kimia menggunakan aktivator asam klorida (HCl) dan asam fosfat (H3PO4) berdasarkan Standar Nasional Indonesia (SNI) No. 06 – 3730 – 1995. Metode penelitian terdiri atas proses karbonisasi TKKS menggunakan alat pirolisis pada suhu 400 ℃ selama 6 jam; aktivasi karbon dengan aktivator HCl dan H3PO4 pada berbagai konsentrasi aktivator; serta karakterisasi karbon aktif pada parameter kadar air dan abu, daya jerap terhadap iod serta daya jerap terhadap biru metilen. Hasil penelitian menunjukkan bahwa HCl 0,5 M merupakan aktivator terbaik dan karbon aktif yang dihasilkan memiliki karakteristik yang sesuai dengan SNI 06 – 3730 – 1995 pada parameter kadar air dan abu serta daya jerap terhadap iod.Kata kunci: Daya Jerap Iod, Karbon Aktif, Tandan Kosong Kelapa Sawit

The sustaining of fluorescence in photodynamic diagnosis after the administration of 5-aminolevulinic acid in carcinogen-induced bladder cancer orthotopic rat model and urothelial cancer cell lines

BackgroundThe administration of 5-aminolevulic acid hydrochloride (5-ALA·HCl) 3 h (range: 2–4 h) before photodynamic diagnosis (PDD) is recommended for detecting bladder tumors. However, there is insufficient evidence on the time duration for the fluorescence of PDD after oral administration of 5-ALA. We investigated the sustainability of the photodynamic effect and protoporphyrinⅨ (PpⅨ) after 5-ALA administration in a carcinogen-induced bladder tumor rat model and bladder cancer cell lines. MethodsThe carcinogen-induced bladder tumor orthotopic rat model was established by the administration of N-butyl-N-(4-hydroxybutyl) nitrosamine. ResultsRed fluorescence was visible 2–8 h after the oral administration of 5-ALA in the carcinogen-induced bladder tumor rat model. Plasma and intratissue PpⅨ (nM) progressed to a higher level at 2 h and remained almost constant 2–8 h after oral administration of 5-ALA. The peak fluorescence intensity of PpⅨ was observed 3–4 h after the administration of 5-ALA in bladder cancer cell lines. The accumulated PpⅨ remained for 4 h after the removal of 5-ALA in UMUC3 cells. It was not clearly visible 3 h after the removal of 5-ALA in MGHU3 and T24 cells. The expression level of ferrochelatase was significantly lower in UMUC3 cells than in other cells. Our findings suggest that 5-ALA-assisted PDD (ALA-PDD) can aid in detecting non-muscle-invasive bladder cancer 2–8 h after 5-ALA administration. ConclusionUrologists might not be required to make excess effort to start ALA-PDD-assisted transurethral resection of bladder tumor after the administration of 5-ALA.

High-Throughput LC-ESI-MS/MS Metabolomics Approach Reveals Regulation of Metabolites Related to Diverse Functions in Mature Fruit of Grafted Watermelon.

Grafting has been reported as a factor regulating the metabolome of a plant. Therefore, a comprehensive metabolic profile and comparative analysis of metabolites were conducted from fully mature fruit of pumpkin-grafted watermelon (PGW) and a self-rooted watermelon (SRW). Widely targeted LC-ESI-MS/MS metabolomics approach facilitated the simultaneous identification and quantification of 339 metabolites across PGW and SRW. Regardless of grafting, delta-aminolevulinic acid hydrochloride, sucrose, mannose-6-phosphate (carbohydrates), homocystine, 2-phenylglycine, s-adenosyl-L-homocysteine (amino acids and derivatives), malic, azelaic, H-butanoic acid ethyl ester-hexoside isomer 1, (organic acids), MAG (18:3) isomer1, LysoPC 16:0, LysoPC 18:2 2n isomer (lipids) p-coumaric acid, piperidine, and salicylic acid-o-glycoside (secondary metabolites) were among the dominant metabolite. Dulcitol, mono-, and disaccharide sugars were higher in PGW, while polysaccharides showed complex behavior. In PGW, most aromatic and nitrogen-rich amino acids accumulated greater than 1.5- and 1-fold, respectively. Intermediates of the tricarboxylic acid cycle (TCA), stress-related metabolites, vitamin B5, and several flavonoids were significantly more abundant in PGW. Most lipids were also significantly higher in grafted watermelon. This is the first report providing a comprehensive picture of watermelon metabolic profile and changes induced by grafting. Hence, the untargeted high-throughput LC-ESI-MS/MS metabolomics approach could be suitable to provide significant differences in metabolite contents between grafted and ungrafted plants.

Combined drugs in the treatment of acute respiratory viral infections: a review of research results

Acute respiratory infections are of the greatest economic significance among all infectious diseases in the Russian Federation. There are no drugs with a direct antiviral effect for most acute respiratory viral infections, which efficacy would have been proven in the numerous clinical trials and confirmed by the results of meta-analyses today. The use of various combinations of antipyretic, anti-inflammatory and antioxidant drugs is the most common method of symptomatic and pathogenetic therapy of acute respiratory viral infections (ARVI). The purpose of this review is to analyse and systematize the results of preclinical and clinical trials aimed at studying the safety and efficacy of fixed-doses combinations of paracetamol, pheniramine maleate, phenylephrine hydrochloride and ascorbic acid in the ARVI therapy. The search of scientific publications was carried out in the PubMed, ClinicalKey ELSEVIER and Google Scholar databases. The search depth was 10 years. The results of numerous comparative and placebo-controlled trials showed that the use of fixed-dose combinations of paracetamol, pheniramine maleate, phenylephrine hydrochloride and ascorbic acid in the ARVI therapy was pathogenetically justified, safe, and effective in relieving symptoms such as fever, rhinitis, cough, muscle and joint pain, sore throat, and headache. The combination drugs can ease the patient’s condition and help shorten the duration of the illness provided that they are administered in due time. Meanwhile, the pathogenetic effects of combination drugs aimed at localizing the focus of inflammation and minimizing the risk of complications warrant further research.

Transcriptome Analysis Reveals Possible Immunomodulatory Activity Mechanism of Chlorella sp. Exopolysaccharides on RAW264.7 Macrophages.

In this study, the exopolysaccharides of Chlorella sp. (CEP) were isolated to obtain the purified fraction CEP4. Characterization results showed that CEP4 was a sulfated heteropolysaccharide. The main monosaccharide components of CEP4 are glucosamine hydrochloride (40.8%) and glucuronic acid (21.0%). The impact of CEP4 on the immune activity of RAW264.7 macrophage cytokines was detected, and the results showed that CEP4 induced the production of nitric oxide (NO), TNF-α, and IL-6 in a dose-dependent pattern within a range of 6 μg/mL. A total of 4824 differentially expressed genes (DEGs) were obtained from the results of RNA-seq. Gene enrichment analysis showed that immune-related genes such as NFKB1, IL-6, and IL-1β were significantly upregulated, while the genes RIPK1 and TLR4 were significantly downregulated. KEGG pathway enrichment analysis showed that DEGs were significantly enriched in immune-related biological processes, including toll-like receptor (TLR) signaling pathway, cytosolic DNA-sensing pathway, and C-type lectin receptor signaling pathway. Protein–protein interaction (PPI) network analysis showed that HSP90AB1, Rbx1, ISG15, Psmb6, Psmb3, Psmb8, PSMA7, Polr2f, Rpsa, and NEDD8 were the hub genes with an essential role in the immune activity of CEP4. The preliminary results of the present study revealed the potential mechanism of CEP4 in the immune regulation of RAW264.7 macrophages, suggesting that CEP4 is a promising immunoregulatory agent.

ВЛИЯНИЕ АЗОТОСОДЕРЖАЩИХ СОЕДИНЕНИЙ НА ПОКАЗАТЕЛИ ПЕРИФЕРИЧЕСКОЙ КРОВИ НА ФОНЕ ЭКСПЕРИМЕНТАЛЬНОЙ ПАНЦИТОПЕНИИ

1-(2-phenylethyl)-4-ketoxympiperidine o-fluorobenzoic acid hydrochloride, a complex with β-cyclodextrin p-fluorobenzene carbonylamide morpholine, a complex with β-cyclodextrin o-fluorobenzene carbonylamide piperidine had high myelostimulating activity at the level of the comparison drug methyluracil. 1-(3-ethoxypropyl)-4-ketoxympiperidine p-fluorobenzoic acid ester hydrochloride, 1-(2-phenylethyl)-4-ketoxympiperidine m-fluorobenzoic acid ester hydrochloride, 1-(2-phenylethyl)-4-ketoxympiperidine p-fluorobenzoic acid ester hydrochloride did not possess leukopoiesis-stimulating activity, but showed erythropoiesis-stimulating and thrombocytopoiesis-stimulating activity at the level of the comparison drug methyluracil.

Tension-type headache in children and adolescents: comparative study of the effectiveness of preventive therapy methods

Introduction. Late and inaccurate diagnosis of tension-type headache (TTH) leads to the lack of timely rational treatment. In children and adolescents with TTH, the role of comorbid disorders that affect the course of TTH and can contribute to their chronification is not sufficiently taken into account. Meanwhile, with timely diagnosis and adequate treatment of TTH in many children and adolescents, a significant improvement in the disease’s course and the prognosis is achieved, and clinical remission is possible. Considering the high prevalence of TTH among children and adolescents, the decline in their quality of life, and the high frequency of comorbid disorders, it is reasonable to develop effective methods of preventive treatment for TTH in this age group. The aim of the study was to evaluate the effectiveness of monotherapy with γ-amino-β-phenyl butyric acid hydrochloride, amitriptyline, or breathing gymnastics (comparison group) indicated for two months as a preventive treatment of TTH in children and adolescents in the open randomized comparative study in three parallel groups of patients. Material and methods. In an open parallel study, 90 TTH patients aged 8-16 years were divided into three groups of 30 patients (each with 15 boys and 15 girls). Results. Significant differences with the comparison group in the individual response to therapy were confirmed. According to the criterion of a 50% or more reduction in the average number of headache attacks per month in group 1 (γ-amino-β-phenyl butyric acid hydrochloride), the improvement was achieved in 56.7% of patients, in group 2 (amitriptyline) - in 73.3%, in the 3rd group (breathing gymnastics) - in 30%. According to a more strict criterion for reducing the average number of headache attacks per month by 75% or more, the response to therapy was observed in group 1 in 30%. In group 2 - in 23.3%, in group 3 - in 3.3% of patients. In groups 1 and 2, along with a significant decrease in the frequency, duration, and intensity of TTH attacks, a significant improvement in daily activity, a favorable effect on the manifestations of fatigue, anxiety disorders, and sleep disorders associated with TTH was demonstrated. The therapeutic efficacy of breathing gymnastics exercises complex was confirmed in the prevention of TTH with frequency, duration, and intensity reduction of TTH, and diminishing its impact on daily activity, a moderate decrease in manifestations of fatigue, anxiety disorders (by patients’ self-assessment), and improvement in sleep quality.

Photodynamic diagnostic ureteroscopy using the VISERA ELITE video system for diagnosis of upper-urinary tract urothelial carcinoma: a prospective cohort pilot study

BackgroundThe advantages of photodynamic diagnostic technology using 5-aminolevulinic acid (ALA-PDD) have been established. The aim of this prospective cohort study was to evaluate the usefulness of ALA-PDD to diagnose upper tract urothelial carcinoma (UT-UC) using the Olympus VISERA ELITE video system.MethodsWe carried out a prospective, interventional, non-randomized, non-contrast and open label cohort pilot study that involved patients who underwent ureterorenoscopy (URS) to detect UT-UC. 5-aminolevulinic acid hydrochloride was orally administered before URS. The observational results and pathological diagnosis with ALA-PDD and traditional white light methods were compared, and the proportion of positive subjects and specimens were calculated.ResultsA total of 20 patients were enrolled and one patient who had multiple bladder tumors did not undergo URS. Fifteen of 19 patients were pathologically diagnosed with UT-UC and of these 11 (73.3%) were ALA-PDD positive. Fourteen of 19 patients were ALA-PDD positive and of these 11 were pathologically diagnosed with UC. For the 92 biopsy specimens that were malignant or benign, the sensitivity for both traditional white light observation and ALA-PDD was the same at 62.5%, whereas the specificities were 73.1% and 67.3%, respectively. Of the 38 specimens that were randomly biopsied without any abnormality under examination by both white light and ALA-PDD, 11 specimens (28.9%) from 5 patients were diagnosed with high grade UC. In contrast, four specimens from 4 patients, which were negative in traditional white light observation but positive in ALA-PDD, were diagnosed with carcinoma in situ (CIS).ConclusionsOur results suggest that ALA-PDD using VISERA ELITE is not sufficiently applicable for UT-UC. Nevertheless, it might be better particularly for CIS than white light and superior results would be obtained using VISERA ELITE II video system.Trial registration: The present clinical study was approved by the Okayama University Institutional Review Board prior to study initiation (Application no.: RIN 1803–002) and was registered with the UMIN Clinical Trials Registry (UMIN-CTR), Japan (Accession no.: UMIN000031205).

Disproportioning of toluene on Pd-H Mordenite catalyst

Synthetic mordenite ceolite was decationized and dealuminated with 2N hydro-chloride acid, calcinated in the temperature range of 500−600 oC. Obtained samples of H-mordenite and initial Na-mordenite have been analyzed on the X-ray phase difractometer and according to the X-ray patterns it was defined that the silica module of elasticity of H-mordenite comprised 17, and the crystallinity reduced for 2-3 %. Furthermore, obtained sample of ceolite catalyst of H-mordenite was modified with Pd+2 ions up to 0.3, 0.5 and 0.8 % by the mass. Catalyst activity of sythesized H-mordenites and metall-ceolite catalysts containing various amount of Pd+2 metal cations was studied in the reaction of disproportioned toluene to the benzole and xylol in the temperature 300−380 °C, H2: CH = 3: 1 mole in the rate of 3.1 h-1. It was defined that the catalyst of 0.5 % Pd-H-mordenite (SiO2: Al2O3 = 17) shows better activity for this reaction.

Preparation of highly permeable nanofiltration membranes with interfacially polymerized biomonomers

To enable the wide application of nanofiltration (NF) membranes to increase the fresh water supply, the development of new membrane materials and preparation techniques are still highly desired. In this work, thin-film composite (TFC) NF membranes were fabricated via interfacial polymerization (IP) using three different kinds of biomonomers with trimesoyl chloride (TMC) on a polysulfone (PSf) substrate. Biomonomers such as dopamine hydrochloride (PDA), norepinephrine (PNE), and tannic acid (TA) are highly hydrophilic and environmentally friendly. Moreover, these materials can not only strongly adhere to substrates but can also form chemically stable cross-linked networks. The influence of these monomers on the formation of the selective layer was systematically investigated. Furthermore, a series of characterization techniques, including attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), zeta potential measurement, molecular weight cutoff (MWCO), X-ray photoelectron spectroscopy (XPS) and separation performance experiments, were used to study the properties of the TFC NF membranes. Biomonomer-based TFC NF membrane exhibited a higher water permeability of 8.14 L/m2 h bar with a high rejection for divalent ions (Na2SO4) of 93% compared to TFC NF membranes.

In silico method development for the reversed-phase liquid chromatography separation of proteins using chaotropic mobile phase modifiers

Recent advances in biomedical and pharmaceutical processes has enabled a notable increase of protein- and peptide-based drug therapies and vaccines that often contain a higher-order structure critical to their efficacy. Hyphenation of chromatographic and spectrometric techniques is at the center of all facets of biopharmaceutical analysis, purification and chemical characterization. Although computer-assisted chromatographic modeling of small molecules has reached a mature stage across the pharmaceutical industry, software-based method optimization approaches for large molecules has yet to see the same revitalization. Conformational changes of biomolecules under chromatographic conditions have been identified as the major culprit in terms of sub-optimal modeling outcomes. In order to circumvent these challenges, we herein investigate the outcomes generated via computer-assisted modeling from using different chaotropic and denaturing mobile phases (trifluoroacetic acid, sodium perchlorate and guanidine hydrochloride in acetonitrile/water-based eluents). Linear and polynomial regression retention models using ACD/Labs software were built as a function of gradient slope, column temperature and mobile phase buffer for eight different model proteins ranging from 12 to 670 kDa (holo-transferrin, cytochrome C, apomyoglobin, ribonuclease A, ribonuclease A type I-A, albumin, y-globulin and thyroglobulin bovine). Correlation between experimental and modeled outputs was substantially improved by using strong chaotropic and denaturing modifiers in the mobile phase, even when using linear regression modeling as typically observed for small molecules. On the contrary, the use of conventional TFA buffer concentrations at low column temperatures required the used of polynomial regression modeling indicating potential conformational structure changes of proteins upon chromatographic conditions. In addition, we illustrate the power of modern computer-assisted chromatography modeling combined with chaotropic agents in the developing of new RPLC assays for protein-based therapeutics and vaccines.

Development and characterization of Lactobacillus acidophilus (LA-3) microparticles with reducing substances and its addition to Reino cheese

Probiotic microencapsulation provides additional protection to the microorganism, facilitating its survival in cheese. This study aimed to develop and to characterize Lb. acidophilus microparticles with l-cysteine hydrochloride and/or ascorbic acid and subsequently add them to Reino cheese. Four microparticles formulations were developed, the survival percentage of Lb. acidophillus was monitored during refrigeration (60 days) and the best formulation was characterized by morphology, distribution and size analysis. Three cheese formulations were developed, T1 (without Lb. acidophilus), T2 (containing free microorganism) and T3 (containing produced microparticles). The cheeses were analyzed after 1 and 25 days of ripening for the microbiological quality control parameters and viability of Lactobacillus spp. The encapsulation yield was over 80% in all microparticles. Formulation F3 showed 33 ± 0.16% lactobacilli survival even after 60 days, demonstrated the effect of the reducing substance added and had a mean diameter of 58 ± 1.51 μm and were spherical, smooth and uniform in shape. The T3 cheese containing the probiotic microparticles showed the highest lactobacilli viability (8.49 ± 0.08 Log CFU/g), provided additional protection to the Lb. acidophilus microorganism benefiting microbial cell survival, and therefore resulted in a ripened Reino cheese with functional probiotic potential for industrial cheese application.

Impact of Ceftiofur Administration in Steers on the Prevalence and Antimicrobial Resistance of Campylobacter spp.

Bacterial resistance to ceftiofur raises health concerns due to ceftiofur’s extensive veterinary usage and structural similarity with the human antibiotic ceftriaxone. Ceftiofur crystalline-free acid (CCFA) and ceftiofur hydrochloride (CHCL) are ceftiofur types used therapeutically in cattle, but their potential impacts on Campylobacter prevalence and antimicrobial resistance remain unclear. In this study two groups of steers were each treated with CCFA or CHCL. In vivo active drug concentrations were measured and fecal samples were analyzed for Campylobacter for up to 42 days post-treatment. Following administration, the colonic concentration of ceftiofur initially increased then dropped to pre-treatment levels by day 8. The estimated prevalence of Campylobacter spp. was significantly (p = 0.0009) higher during the first week after CCFA treatment than after CHCL treatment (81.3% vs. 45.2%). Campylobacter jejuni predominated overall, with other Campylobacter spp. mainly identified in the first week after CCFA treatment. No treatment impacts were noted on ceftiofur minimum inhibitory concentration (MIC) for C. jejuni (10–20 μg/mL). More C. jejuni genotypes were detected in CCFA-treated than CHCL-treated steers. These findings suggest that ceftiofur did not significantly impact Campylobacter prevalence or ceftiofur MIC. However, CHCL may be preferable due to the lower likelihood of temporary increases in Campylobacter prevalence.

Synthesis of 5-Nitro-1,2,4-Triazol-3-One Via: Conventional Heating, Microwave and Ultrasonication

In this laboratory experiment 2,4-dihydro-3H-1,2,5-Triazol-3-one(TO) was synthesized using mixture of semicarbazide hydrochloride(SC.HCl) and formic acid in 1:3 mole ratio. TO was further nitrated using 70% nitric acid (HNO3) to produce2,4-dihydro-3H-5-nitro-1,2,5-triazol-3-one(NTO). For the nitration reaction three techniques were employed: conventional heating, microwave assisted and ultrasound assisted reaction. It was found that the extent of gases generation during the reaction was reduced when microwave and ultrasound was employed as compared to the conventional heating method. The time taken for the completion of the reaction was only 15 min when microwave was used.

Injectable Glycol Chitosan Hydrogel Containing Folic Acid-Functionalized Cyclodextrin-Paclitaxel Complex for Breast Cancer Therapy.

We prepared a drug carrier which consisted of injectable methacrylated glycol chitosan (MGC) hydrogel, and a conjugate of 6-monodeoxy-6-monoamino-β-cyclodextrin⋅hydrochloride (6-NH2-β-CD⋅HCl), polyethylene glycol (PEG), and folic acid (FA) for the local delivery and improved cellular uptake of paclitaxel (PTX) (MGC/CDPF-ic-PTX). CDPF refers to a conjugate of 6-NH2-β-CD⋅HCl, PEG, and FA. The anti-cancer effect was investigated using a xenograft mouse model. As controls, the animal study on MGC/PTX and MGC/CD-ic-PTX was performed. The swelling ratio of all samples was analyzed for 7 days, and it showed a gradual increase for 3 days and a maintained state afterward. From the release result, the MGC-based samples have an initial burst for 1 day and a sustained release for 7 days. Results of cytotoxicity and animal study showed the biocompatibility and superior anti-cancer effect of MGC/CDPF-ic-PTX against breast cancer. Furthermore, histological results showed the anti-cancer capacity of MGC/CDPF-ic-PTX against breast cancer. These findings suggest that MGC/CDPF-ic-PTX has clinical potential for breast cancer therapy.

Role of polyelectrolyte multilayers over gold film for selective creatinine detection using Raman spectroscopy

Development of nano-roughened surface-enhanced Raman scattering (SERS) substrates is still of great interest for applications in SERS sensor with good sensitivity, selectivity, and uniformity. In this work, nanostructured polyelectrolyte films coated Au film is designed as a SERS substrate for label-free and selective creatinine detection. Two-component multilayer films are fabricated by layer-by-layer (LbL) deposition of polyacrylic acid (PAA) and polyallylamine hydrochloride (PAH). The SERS sensing behaviors including electric field enhancement, sensitivity, and selectivity strongly influence by morphology and types of polyelectrolyte. The dense polyelectrolyte nanostructured film over Au substrate (30 PAA/PAH bilayers) possesses the strongest SERS hotspots. The PAH outermost layer exhibits the highest creatinine signal comparing to other selected polyelectrolytes. This creatinine signal could amplify by free vibration of creatinine on PAH. This substrate exhibited good performance for creatinine detection in pH 5 to 7-buffered solutions. By performing creatinine analysis in artificial urine, good sensitivity with wide linear response (1 µM to 10 mM) and low detection limit of 1.47 µM was found. Moreover, this substrate has high selectivity for creatinine detection compared to interferences. With the contribution of both plasmonic Au film and polyelectrolyte multilayers, these findings underscore the guideline for creating selective SERS substrate for creatinine detection.