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Articles 691 - 720 of 1074

Full-Text Articles in Medicinal Chemistry and Pharmaceutics

Cytotoxic And Antioxidant Capacity Of Camel Milk Peptides: Effects Of Isolated Peptide On Superoxide Dismutase And Catalase Gene Expression, M. Homayouni-Tabrizi, A. Asoodeh, M. Soltani Jul 2020

Cytotoxic And Antioxidant Capacity Of Camel Milk Peptides: Effects Of Isolated Peptide On Superoxide Dismutase And Catalase Gene Expression, M. Homayouni-Tabrizi, A. Asoodeh, M. Soltani

Journal of Food and Drug Analysis

Peptides from natural sources such as milk are shown to have a wide spectrum of biological activities. In this study, three peptides with antioxidant capacity were identified from camel milk protein hydrolysate. Pepsin and pancreatin were used for hydrolysis of milk proteins. Ultrafiltration and reverse-phase high-performance liquid chromatography were used for the concentration and purification of the hydrolysate, respectively. Sequences of the three peptides, which were determined by matrix-assisted laser desorption/ionization time-of-flight spectrophotometry, were LEEQQQTEDEQQDQL [molecular weight (MW): 1860.85 Da, LL-15], YLEELHRLNAGY (MW: 1477.63 Da, YY-11), and RGLHPVPQ (MW: 903.04 Da, RQ-8). The 3-(4,5-dimethylthia-zol-2-yl)-2,5-diphenyltetrazolium bromide assay was used to evaluate …

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Novel Electrochemical Xanthine Biosensor Based On Chitosan–Polypyrrole–Gold Nanoparticles Hybrid Bio-Nanocomposite Platform, M. Dervisevic, E. Dervisevic, E. Çevik, M. Şenel Jul 2020

Novel Electrochemical Xanthine Biosensor Based On Chitosan–Polypyrrole–Gold Nanoparticles Hybrid Bio-Nanocomposite Platform, M. Dervisevic, E. Dervisevic, E. Çevik, M. Şenel

Journal of Food and Drug Analysis

The aim of this study was the electrochemical detection of the adenosine-3-phosphate degradation product, xanthine, using a new xanthine biosensor based on a hybrid bio-nanocomposite platform which has been successfully employed in the evaluation of meat freshness. In the design of the amperometric xanthine biosensor, chitosan–polypyrrole–gold nanoparticles fabricated by an in situ chemical synthesis method on a glassy carbon electrode surface was used to enhance electron transfer and to provide good enzyme affinity. Electrochemical studies were carried out by the modified electrode with immobilized xanthine oxidase on it, after which the biosensor was tested to ascertain the optimization parameters. The …

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Microencapsulation Of Fish Oil Using Supercritical Antisolvent Process, F.T. Karim, K. Ghafoor, S. Ferdosh, F. Al-Juhaimi, E. Ali, K.B. Yunus, M.H. Hamed, A. Islam, M. Asif, I.S.M. Zaidul Jul 2020

Microencapsulation Of Fish Oil Using Supercritical Antisolvent Process, F.T. Karim, K. Ghafoor, S. Ferdosh, F. Al-Juhaimi, E. Ali, K.B. Yunus, M.H. Hamed, A. Islam, M. Asif, I.S.M. Zaidul

Journal of Food and Drug Analysis

In order to improve the encapsulation process, a newly supercritical antisolvent process was developed to encapsulate fish oil using hydroxypropyl methyl cellulose as a polymer. Three factors, namely, temperature, pressure, and feed emulsion rate were optimized using response surface methodology. The suitability of the model for predicting the optimum response value was evaluated at the conditions of temperature at 60°C, pressure at 150 bar, and feed rate at 1.36 mL/min. At the optimum conditions, particle size of 58.35 μm was obtained. The surface morphology of the micronized fish oil was also evaluated using field emission scanning electron microscopy where it …

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Microbiological, Histological, And Biochemical Evidence For The Adverse Effects Of Food Azo Dyes On Rats, K. Elbanna, O.M. Sarhan, M. Khider, M. Elmogy, H.H. Abulreesh, M.R. Shaaban Jul 2020

Microbiological, Histological, And Biochemical Evidence For The Adverse Effects Of Food Azo Dyes On Rats, K. Elbanna, O.M. Sarhan, M. Khider, M. Elmogy, H.H. Abulreesh, M.R. Shaaban

Journal of Food and Drug Analysis

In this study, 120 lactic acid bacterial strains from different fermented dairy products as well as 10 bacterial intestinal isolates were evaluated for in vitro and in vivo degradation of various food azo dyes. Of these isolates, lactic acid bacteria (LAB) strains 13 and 100 and the intestinal isolates Ent2 and Eco5 exhibited 96–98% degradation of the tested food azo dyes within 5–6 hours. High performance liquid chromatography mass spectra of sunset yellow (E110) and carmoisine (E122) anaerobic degradation products by the intestinal isolates showed that they were structurally related to toxic aromatic amines. For an in vivo study, eight …

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Evaluation Of The Prebiotic Effects Of Citrus Pectin Hydrolysate, Y.-Y. Ho, C.-M. Lin, M.-C. Wu Jul 2020

Evaluation Of The Prebiotic Effects Of Citrus Pectin Hydrolysate, Y.-Y. Ho, C.-M. Lin, M.-C. Wu

Journal of Food and Drug Analysis

Citrus pectin enzyme hydrolysate (PEH) of different hydrolysis time intervals (6 hours, PEH-6; 12 hours, PEH-12; 24 hours, PEH-24; or 48 hours, PEH-48) or concentrations (1%, 2%, and 4%) was tested for its growth stimulation effect on two probiotics, Bifidobacterium bifidum and Lactobacillus acidophilus. Higher monosaccharide concentrations and smaller molecular weights of PEHs were obtained by prolonging the hydrolysis time. In addition, higher PEH concentrations resulted in significantly higher (p < 0.05) probiotic populations, pH reduction, and increase in total titratable acidity than the glucose-free MRS negative control. Furthermore, significantly higher populations in the low pH environment and longer survival time in nonfat milk (p < 0.05) were observed when the two probiotics were incubated in media supplemented with 2% PEH-24, than in glucose and the negative control. In comparison with other prebiotics, addition of 2% PEH-24 resulted in a more significant increase in the probiotic population (p < 0.05) than in the commercial prebiotics. This study demonstrated that PEH derived from citrus pectin could be an effective prebiotic to enhance the growth, fermentation, acid tolerance, and survival in nonfat milk for the tested probiotics. © 2017

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Assessment Of Rosehips Based On The Content Of Their Biologically Active Compounds, A. Bhave, V. Schulzova, H. Chmelarova, L. Mrnka, J. Hajslova Jul 2020

Assessment Of Rosehips Based On The Content Of Their Biologically Active Compounds, A. Bhave, V. Schulzova, H. Chmelarova, L. Mrnka, J. Hajslova

Journal of Food and Drug Analysis

In this study, an in-depth analysis of the unique set of rosehip samples from 71 Rosa genotypes was conducted with the aim to identify the most suitable ones for applications in the food and pharmaceutical industries based on the content of biologically active compounds. In the first part of our experiments, the antioxidant activity was determined by 2,2-diphenyl-1-picrylhydrazyl assay and the genotypes with the highest values were selected for the follow-up analysis. In the second part of experiments, the major classes of biologically active compounds in rosehips such as carotenoids, tocopherols, flavonoids, and triterpenoic acids were further quantified using liquid …

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Convenient Uv-Spectrophotometric Determination Of Citrates In Aqueous Solutions With Applications In The Pharmaceutical Analysis Of Oral Electrolyte Formulations, S. Krukowski, M. Karasiewicz, W. Kolodziejski Jul 2020

Convenient Uv-Spectrophotometric Determination Of Citrates In Aqueous Solutions With Applications In The Pharmaceutical Analysis Of Oral Electrolyte Formulations, S. Krukowski, M. Karasiewicz, W. Kolodziejski

Journal of Food and Drug Analysis

Herein, we present a convenient method for quantitative spectrophotometric determination of citrate ions in aqueous solutions in the middle-UV range. It involves measuring the absorbance of citric acid at 209 nm under suppressed dissociation at pH < 1.0 in the presence of hydrochloric acid. Validation of the method was performed according to the guidelines of the International Conference on Harmonization. A very good linear dependence of the absorbance on concentration (r2 = 0.9999) was obtained in a citrate concentration range of 0.5–5.0 mmol/L. This method is characterized by excellent precision and accuracy; the coefficient of variation in each case is below the maximal permissible value (%RSD < 2). The proposed analytical procedure has been successfully applied to the determination of citrates in oral electrolyte formulations. © 2017

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Therapeutic Effects Of D-Aspartate In A Mouse Model Of Multiple Sclerosis, S. Afraei, A. D'Aniello, R. Sedaghat, P. Ekhtiari, G. Azizi, N. Tabrizian, L. Magliozzi, Z. Aghazadeh, A. Mirshafiey Jul 2020

Therapeutic Effects Of D-Aspartate In A Mouse Model Of Multiple Sclerosis, S. Afraei, A. D'Aniello, R. Sedaghat, P. Ekhtiari, G. Azizi, N. Tabrizian, L. Magliozzi, Z. Aghazadeh, A. Mirshafiey

Journal of Food and Drug Analysis

Experimental autoimmune encephalomyelitis (EAE) is an animal model of multiple sclerosis. EAE is mainly mediated by adaptive and innate immune responses that leads to an inflammatory demyelization and axonal damage. The aim of the present research was to examine the therapeutic efficacy of D-aspartic acid (D-Asp) on a mouse EAE model. EAE induction was performed in female C57BL/6 mice by myelin 40 oligodendrocyte glycoprotein (35-55) in a complete Freund's adjuvant emulsion, and D-Asp was used to test its efficiency in the reduction of EAE. During the course of study, clinical evaluation was assessed, and on Day 21, post-immunization blood samples …

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An Analysis Method For Flavan-3-Ols Using High Performance Liquid Chromatography Coupled With A Fluorescence Detector, L. Wang, Y. Yamashita, A. Saito, H. Ashida Jul 2020

An Analysis Method For Flavan-3-Ols Using High Performance Liquid Chromatography Coupled With A Fluorescence Detector, L. Wang, Y. Yamashita, A. Saito, H. Ashida

Journal of Food and Drug Analysis

Procyanidins belong to a family of flavan-3-ols, which consist of monomers, (+)-catechin and (−)-epicatechin, and their oligomers and polymers, and are distributed in many plant-derived foods. Procyanidins are reported to have many beneficial physiological activities, such as antihypertensive and anticancer effects. However, the bioavailability of procyanidins is not well understood owing to a lack of convenient and high-sensitive analysis methods. The aim of this study was to develop an improved method for determining procyanidin content in both food materials and biological samples. High performance liquid chromatography (HPLC) coupled with a fluorescence detector was used in this study. The limits of …

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New Psychoactive Substances Of Natural Origin: A Brief Review, L.-Y. Feng, A. Battulga, E. Han, H. Chung, J.-H. Li Jul 2020

New Psychoactive Substances Of Natural Origin: A Brief Review, L.-Y. Feng, A. Battulga, E. Han, H. Chung, J.-H. Li

Journal of Food and Drug Analysis

Plant-based drugs of abuse are as old as recorded human history. Although traditional addictive substances, such as opium, cannabis and coca, have been controlled by the United Nations anti-drug conventions, many, if not most, natural plants with addictive or abuse liability remain elusive. Therefore, the United Nations Office on Drugs and Crime (UNODC) has warned the emerging threat from new psychoactive substances (NPS), which are mostly derived or modified from the constituents of natural origin. For example, synthetic cannabinoids and synthetic cathinones are derived from the cannabis and khat plant, respectively. In this review, we briefly discussed the chemistry, pharmacology …

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Safety Of Frozen Liver For Human Consumption, G.A.K. Kirrella, A.M.M. Deeb, R.M.I. Abdallah Jul 2020

Safety Of Frozen Liver For Human Consumption, G.A.K. Kirrella, A.M.M. Deeb, R.M.I. Abdallah

Journal of Food and Drug Analysis

The objective of this study was to ensure and evaluate the safety of imported frozen beef liver traded in supermarkets of Kafr El-Sheikh Governorate, Egypt, through detection of Salmonella typhimurium, Salmonella enteritidies, Escherichia coli O157:H7, antibiotic residues, and aflatoxin B1 residue. Fifty samples of imported frozen liver were randomly collected from different shops at Kafr El-Sheikh Governorate for isolation of S. typhimurium, S. enteritidies, and E. coli O157:H7. The results revealed that for both microorganisms 4% of the examined samples presumed to contain Salmonella and E. coli O157:H7 organisms, according to the colonial character on Harlequin Salmonella ABC agar media …

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The Detoxifying Effects Of Structural Elements Of Persimmon Tannin On Chinese Cobra Phospholipase A2 Correlated With Their Structural Disturbing Effects Well, Y. Zhang, C.-M. Li Jul 2020

The Detoxifying Effects Of Structural Elements Of Persimmon Tannin On Chinese Cobra Phospholipase A2 Correlated With Their Structural Disturbing Effects Well, Y. Zhang, C.-M. Li

Journal of Food and Drug Analysis

The effects of persimmon tannin (PT) characteristic structural elements on Naja atra phospholipase A2 (PLA2)-induced lethality, myotoxicity, and hemolysis in mice models were determined. In addition, methods including surface plasmon resonance, dynamic light scattering, and Fourier transform infrared spectroscopy were explored to uncover the possible detoxifying mechanisms of PT on snake venom PLA2. Our results revealed that PT characteristic elements (EGCG, ECG, A-type EGCG dimer, and A-type ECG dimer) could neutralize the lethality, myotoxicity, and hemolysis of PLA2. Moreover, the detoxifying effects of the four structural elements correlated with their structural disturbing effects well. Our results proved that A-type EGCG …

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Fast And Simple Method For Semiquantitative Determination Of Calcium Propionate In Bread Samples, C.M. Phechkrajang, S. Yooyong Jul 2020

Fast And Simple Method For Semiquantitative Determination Of Calcium Propionate In Bread Samples, C.M. Phechkrajang, S. Yooyong

Journal of Food and Drug Analysis

Calcium propionate has been widely used as a preservative in bakery and in bread. It is sometimes not carefully used, or a high concentration is added to preserve products. High consumption of calcium propionate can lead to several health problems. This study aims to develop a fast and simple semiquantitative method based on color complex formation for the determination of calcium propionate in a bread sample. A red–brown complex was obtained from the reaction of ferric ammonium sulfate and propionate anion. The product was rapidly formed and easily observed with the concentration of propionate anion >0.4 mg/mL. A high-performance liquid …

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Antibacterial Activity And Interactions Of Plant Essential Oil Combinations Against Gram-Positive And Gram-Negative Bacteria, C.A. Semeniuc, C.R. Pop, A.M. Rotar Jul 2020

Antibacterial Activity And Interactions Of Plant Essential Oil Combinations Against Gram-Positive And Gram-Negative Bacteria, C.A. Semeniuc, C.R. Pop, A.M. Rotar

Journal of Food and Drug Analysis

The aim of this study was to compare the antibacterial effects of several essential oils (EOs) alone and in combination against different Gram-positive and Gram-negative bacteria associated with food products. Parsley, lovage, basil, and thyme EOs, as well as their mixtures (1:1, v/v), were tested against Bacillus cereus, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Salmonella typhimurium. The inhibitory effects ranged from strong (thyme EO against E. coli) to no inhibition (parsley EO against P. aeruginosa). Thyme EO exhibited strong (against E. coli), moderate (against S. typhimurium and B. cereus), or mild inhibitory effects (against P. aeruginosa and S. aureus), …

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Curcumin Inhibits Adenosine Deaminase And Arginase Activities In Cadmium-Induced Renal Toxicity In Rat Kidney, A.J. Akinyemi, N. Onyebueke, O.A. Faboya, S.A. Onikanni, A. Fadaka, I. Olayide Jul 2020

Curcumin Inhibits Adenosine Deaminase And Arginase Activities In Cadmium-Induced Renal Toxicity In Rat Kidney, A.J. Akinyemi, N. Onyebueke, O.A. Faboya, S.A. Onikanni, A. Fadaka, I. Olayide

Journal of Food and Drug Analysis

In this study, the effect of enzymes involved in degradation of renal adenosine and L-arginine was investigated in rats exposed to cadmium (Cd) and treated with curcumin, the principal active phytochemical in turmeric rhizome. Animals were divided into six groups (n = 6): saline/vehicle, saline/curcumin 12.5 mg/kg, saline/curcumin 25 mg/kg, Cd/vehicle, Cd/curcumin 12.5 mg/kg, and Cd/curcumin 25 mg/kg. The results of this study revealed that the activities of renal adenosine deaminase and arginase were significantly increased in Cd-treated rats when compared with the control (p < 0.05). However, co-treatment with curcumin inhibits the activities of these enzymes compared with Cd-treated rats. Furthermore, Cd intoxication increased the levels of some renal biomarkers (serum urea, creatinine, and electrolytes) and malondialdehyde level with a concomitant decrease in functional sulfhydryl group and nitric oxide (NO). However, co-treatment with curcumin at 12.5 mg/kg and 25 mg/kg, respectively, increases the nonenzymatic antioxidant status and NO in the kidney, with a concomitant decrease in the levels of malondialdehyde and renal biomarkers. Therefore, our results reinforce the importance of adenosine deaminase and arginase activities in Cd poisoning conditions and suggest some possible mechanisms of action by which curcumin prevent Cd-induced renal toxicity in rats. © 2016

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Simultaneous Characterization And Quantification Of 17 Main Compounds In Rabdosia Rubescens By High Performance Liquid Chromatography, S. Guo, X. Cui, M. Jiang, L. Bai, X. Tian, T. Guo, Q. Liu, L. Zhang, C.-T. Ho, N. Bai Jul 2020

Simultaneous Characterization And Quantification Of 17 Main Compounds In Rabdosia Rubescens By High Performance Liquid Chromatography, S. Guo, X. Cui, M. Jiang, L. Bai, X. Tian, T. Guo, Q. Liu, L. Zhang, C.-T. Ho, N. Bai

Journal of Food and Drug Analysis

Rabdosia rubescens is a healthy herbal tea and well-known Chinese medicinal herb. To evaluate the quality of R. rubescens from China, a high performance liquid chromatography method with dual-wavelength detection was developed and validated. The method was successfully applied for the simultaneous characterization and quantification of 17 main constituents from four different cultivation regions in China. Under optimal conditions, analysis was performed on a Luna C-18 column and gradient elution with a solvent system of acetonitrile and 0.5% (v/v) acetic acid–water at a flow rate of 1.0 mL/min and wavelength of 220 nm and 280 nm. All standard calibration curves …

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A Randomized, Double-Blind Clinical Study To Determine The Effect Of Ankascin 568 Plus On Blood Glucose Regulation, Y.-R. Wang, S.-F. Liu, Y.-C. Shen, C.-L. Chen, C.-N. Huang, T.-M. Pan, C.-K. Wang Jul 2020

A Randomized, Double-Blind Clinical Study To Determine The Effect Of Ankascin 568 Plus On Blood Glucose Regulation, Y.-R. Wang, S.-F. Liu, Y.-C. Shen, C.-L. Chen, C.-N. Huang, T.-M. Pan, C.-K. Wang

Journal of Food and Drug Analysis

Diabetes is the fourth major cause of death in Taiwan. High blood glucose can lead to macrovascular diseases, small vessel diseases (retinopathy, kidney disease), and neuropathy. This study aimed to investigate whether Monascus-fermented products (ANKASCIN 568 plus) can regulate blood glucose and blood lipids. This study enrolled 39 patients with a fasting blood glucose level between 100 mg/dL and 180 mg/dL, and a glycated hemoglobin (HbA1c) level of < 9%. All patients were randomly divided into placebo (n = 20) and experimental (n = 19) groups. Each patient received two placebo capsules (maltodextrin) or ANKASCIN 568 plus capsules daily for 12 weeks. The patients were screened during follow-up 4 weeks after the administration of sample or placebo had been discontinued. Blood and urine samples were collected at the initial, 6th week, 12th week, and 16th week. The anthropometric indicators of blood pressure, fasting plasma glucose level, postprandial plasma glucose level, insulin level, insulin resistance, blood lipid changes, and liver, kidney, and thyroid function indices were measured. After 6 weeks, changes in fasting blood glucose, low-density lipoprotein cholesterol (LDL-C), and total cholesterol (TC) levels showed that ANKASCIN 568 plus had a more favorable effect than the placebo. Compared to baseline, a statistically significant decrease of 8.5%, 10.3%, and 7.5% was observed in fasting blood glucose, LDL-C and, TC levels, respectively (p < 0.05 for all pairs). Therefore, ANKASCIN 568 plus produced by Monascus purpureus NTU 568 fermentation may be a potentially useful agent for the regulation of blood glucose and blood lipids and for treatment of coronary artery diseases.

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Effect Of Oleuropein Against Chemotherapy Drug-Induced Histological Changes, Oxidative Stress, And Dna Damages In Rat Kidney Injury, F. Geyikoglu, M. Emir, S. Colak, K. Koc, H. Turkez, M. Bakir, M. Hosseinigouzdagani, S. Cerig, O.N. Keles, N.S. Ozek Jul 2020

Effect Of Oleuropein Against Chemotherapy Drug-Induced Histological Changes, Oxidative Stress, And Dna Damages In Rat Kidney Injury, F. Geyikoglu, M. Emir, S. Colak, K. Koc, H. Turkez, M. Bakir, M. Hosseinigouzdagani, S. Cerig, O.N. Keles, N.S. Ozek

Journal of Food and Drug Analysis

Cisplatin-based chemotherapy is responsible for a large number of renal failures, and it is still associated with high rates of mortality today. Oleuropein (OLE) presents a plethora of pharmacological beneficial properties. In this study we investigated whether OLE could provide sufficient protection against cisplatin-induced nephrotoxicity. With this aim, Sprague-Dawley rats were divided into eight groups: control; 7 mg/kg/d cisplatin, 50 mg/kg, 100 mg/kg, and 200 mg/kg OLE; and treatment with OLE for 3 days starting at 24 hours following cisplatin injection. After exposure to the chemotherapy agent and OLE, oxidative DNA damage was quantitated in the renal tissue of experimental …

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Averrhoa Bilimbi Fruits Attenuate Hyperglycemia-Mediated Oxidative Stress In Streptozotocin-Induced Diabetic Rats, S.B. Kurup, S. Mini Jul 2020

Averrhoa Bilimbi Fruits Attenuate Hyperglycemia-Mediated Oxidative Stress In Streptozotocin-Induced Diabetic Rats, S.B. Kurup, S. Mini

Journal of Food and Drug Analysis

Hyperglycemia-mediated oxidative stress plays a major role in the development of diabetic complications. Averrhoa bilimbi Linn. (Oxalidaceae) is a medicinal plant with fruits reported to possess antidiabetic activity. This study evaluated the beneficial effects of the ethyl acetate fraction of A. bilimbi fruit (ABAEE) on the antioxidant/oxidant status in diabetes mellitus. Diabetic rats were treated orally with the ethyl acetate fraction of A. bilimbi fruits at a dose of 25 mg/kg body weight for 60 days. Serum glucose, glycated hemoglobin, plasma insulin, hepatic toxicity markers, antioxidant enzymes, lipid peroxidation products, and liver histopathology were assayed checked after 60 days of …

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Dna Barcode And Identification Of The Varieties And Provenances Of Taiwan's Domestic And Imported Made Teas Using Ribosomal Internal Transcribed Spacer 2 Sequences, S.-C. Lee, C.-H. Wang, C.-E. Yen, C. Chang Jul 2020

Dna Barcode And Identification Of The Varieties And Provenances Of Taiwan's Domestic And Imported Made Teas Using Ribosomal Internal Transcribed Spacer 2 Sequences, S.-C. Lee, C.-H. Wang, C.-E. Yen, C. Chang

Journal of Food and Drug Analysis

The major aim of made tea identification is to identify the variety and provenance of the tea plant. The present experiment used 113 tea plants [Camellia sinensis (L.) O. Kuntze] housed at the Tea Research and Extension Substation, from which 113 internal transcribed spacer 2 (ITS2) fragments, 104 trnL intron, and 98 trnL-trnF intergenic sequence region DNA sequences were successfully sequenced. The similarity of the ITS2 nucleotide sequences between tea plants housed at the Tea Research and Extension Substation was 0.379–0.994. In this polymerase chain reaction-amplified noncoding region, no varieties possessed identical sequences. Compared with the trnL intron and trnL-trnF …

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Effect Of Storage Temperature And Time On The Nutritional Quality Of Walnut Male Inflorescences, W.-E. Zhang, C.-L. Wang, B.-B. Shi, X.-J. Pan Jul 2020

Effect Of Storage Temperature And Time On The Nutritional Quality Of Walnut Male Inflorescences, W.-E. Zhang, C.-L. Wang, B.-B. Shi, X.-J. Pan

Journal of Food and Drug Analysis

The objective of this study was to investigate the effect of storage temperature and time on nutrients, bioactive compounds, and antioxidant activities of walnut male inflorescences. The results showed that the moisture, saccharides, fat, protein, amino acids, ascorbic acid, phenolic and flavonoid compound contents, and antioxidant activities of walnut male inflorescences were markedly influenced by storage temperature, and different degrees of decrease in these parameters were observed during the entire storage period. Moreover, higher storage temperature had a more significant effect on the nutrients, bioactive compounds, and antioxidant activities of walnut male flowers, and the loss rate of these components …

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Antioxidant And Antimicrobial Phenolic Compounds From Extracts Of Cultivated And Wild-Grown Tunisian Ruta Chalepensis, I. Ouerghemmi, Rebey I. Bettaieb, F.Z. Rahali, S. Bourgou, L. Pistelli, R. Ksouri, B. Marzouk, Tounsi M. Saidani Jul 2020

Antioxidant And Antimicrobial Phenolic Compounds From Extracts Of Cultivated And Wild-Grown Tunisian Ruta Chalepensis, I. Ouerghemmi, Rebey I. Bettaieb, F.Z. Rahali, S. Bourgou, L. Pistelli, R. Ksouri, B. Marzouk, Tounsi M. Saidani

Journal of Food and Drug Analysis

The antioxidant and antibacterial activities of phenolic compounds from cultivated and wild Tunisian Ruta chalepensis L. leaves, stems, and flowers were assessed. The leaves and the flowers exhibited high but similar total polyphenol, flavonoid, and tannin content. Moreover, two organs showed strong, although not significantly different, total antioxidant activity, 2,2-diphenyl-1-picrylhydrazyl scavenging ability, and reducing power. Investigation of the phenolic composition showed that vanillic acid and coumarin were the major compounds in the two organs, with higher percentages in the cultivated organs than in the spontaneous organs. Furthermore, R. chalepensis extracts showed marked antibacterial properties against human pathogen strains, and the …

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Composition Analysis And Antioxidant Properties Of Black Garlic Extract, X. Lu, N. Li, X. Qiao, Z. Qiu, P. Liu Jul 2020

Composition Analysis And Antioxidant Properties Of Black Garlic Extract, X. Lu, N. Li, X. Qiao, Z. Qiu, P. Liu

Journal of Food and Drug Analysis

Black garlic produced from fresh garlic under controlled high temperature and humidity has strong antioxidant properties. To determine these compounds, five fractions (from F1 to F5) were separated and purified by elution with chloroform:methanol at different ratios (8:1, 6:1, 4:1, 2:1, and 0:1; v/v). The antioxidant activity of each fraction was analyzed. The results showed that F3 and F4 had higher phenolic contents and stronger 2,2-diphenyl-2-picrylhydrazyl radical scavenging activity than the others. Seven purified individual components were further separated using semipreparation high-performance liquid chromatography from these two intensely antioxidant fractions (F3 and F4), their structures were elucidated by high-performance liquid …

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Determination Of Multiresidue Analysis Of Β-Agonists In Muscle And Viscera Using Liquid Chromatograph/Tandem Mass Spectrometry With Quick, Easy, Cheap, Effective, Rugged, And Safe Methodologies, Y.-P. Lin, Y.-L. Lee, C.-Y. Hung, W.-J. Huang, S.-C. Lin Jul 2020

Determination Of Multiresidue Analysis Of Β-Agonists In Muscle And Viscera Using Liquid Chromatograph/Tandem Mass Spectrometry With Quick, Easy, Cheap, Effective, Rugged, And Safe Methodologies, Y.-P. Lin, Y.-L. Lee, C.-Y. Hung, W.-J. Huang, S.-C. Lin

Journal of Food and Drug Analysis

The official analytical method of the Taiwan Food and Drug Administration, Ministry of Health and Welfare for testing for veterinary drug residues in foods is the multiresidue analysis of β-agonists. Samples are pretreated through liquid–liquid extraction and solid-phase extraction. This method is time consuming and requires the intensive use of solvents. To improve analytical efficiency and reduce costs, our study incorporated QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) techniques to establish a new method of multiresidue analysis of β-agonists in animal muscle and viscera. The pretreatment time was shortened and solvent usage was minimized. The modified analysis was conducted …

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Impact Of Different Partitioned Solvents On Chemical Composition And Bioavailability Of Sasa Quelpaertensis Nakai Leaf Extract, M. Nakamura, J.-H. Ra, Y. Jee, J.-S. Kim Jul 2020

Impact Of Different Partitioned Solvents On Chemical Composition And Bioavailability Of Sasa Quelpaertensis Nakai Leaf Extract, M. Nakamura, J.-H. Ra, Y. Jee, J.-S. Kim

Journal of Food and Drug Analysis

The leaves of Sasa quelpaertensis Nakai were extracted with 80% ethanol and further partitioned with n-hexane, chloroform, ethyl acetate, n-butanol, and aqueous fractions to evaluate the biological activity through assessment via various in vitro assays, including total phenol content; 1,1-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azino-bis-(3-ethylbenzothiazothiazoline-6-sulfornic acid (ABTS) radical scavenging; reducing power; α-glucosidase and tyrosinase inhibitory; and alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) activity assays. The highest activity was found in the ethyl acetate fraction for all assays and showed stronger DPPH radical scavenging, reducing power, and tyrosinase inhibitory activity than the positive controls (butylated hydroxytoluene, α-tocopherol, and arbutin, respectively). When compared …

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Assessment Of Bacterial Quality Of Honey Produced In Tamale Metropolis (Ghana), P. Adadi, A.K. Obeng Jul 2020

Assessment Of Bacterial Quality Of Honey Produced In Tamale Metropolis (Ghana), P. Adadi, A.K. Obeng

Journal of Food and Drug Analysis

The bacterial quality of honey from different production sites within Tamale metropolis, Ghana, was estimated using standard microbiological methods. Honey samples were bought from six different production sites within Tamale metropolis and labeled. Samples that were taken from location B recorded the least mean bacterial count of 6.0 × 104 colony forming units/mL with samples taken from location D showing the highest, 1.1 × 105 colony forming units/mL. However, samples from production sites E and F recorded no bacteria growth. Bacteria isolated included Escherichia coli, Staphylococcus spp., Shigella spp., Streptococcus spp., and Bacillus spp. The pH values of honey samples …

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Simultaneous Separation Of Antihyperlipidemic Drugs By Green Ultrahigh-Performance Liquid Chromatography–Diode Array Detector Method: Improving The Health Of Liquid Chromatography, M. Alghazi, F. Alanazi, K. Mohsin, N.A. Siddiqui, F. Shakeel, N. Haq Jul 2020

Simultaneous Separation Of Antihyperlipidemic Drugs By Green Ultrahigh-Performance Liquid Chromatography–Diode Array Detector Method: Improving The Health Of Liquid Chromatography, M. Alghazi, F. Alanazi, K. Mohsin, N.A. Siddiqui, F. Shakeel, N. Haq

Journal of Food and Drug Analysis

Statins in combination with fibrates show beneficial effects on the lipoprotein profile of patients because they have positive complimentary effects on lipid profile. A new green ultrahigh-performance liquid chromatography–diode array detector method for simultaneous analysis of simvastatin (SMV) and fenofibrate (FNF) in standard form, marketed formulations, and self-emulsifying drug delivery system formulations was developed and validated in the present investigation. The method utilized C18 as stationary phase and a combination of methanol:water (8:2) as an eluent. It was found that selected eluent provided short run time (2.5 minutes), better peak symmetry and satisfactory values of other chromatographic parameters such as …

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Rapid Investigation Of Α-Glucosidase Inhibitory Activity Of Phaleria Macrocarpa Extracts Using Ftir-Atr Based Fingerprinting, S. Easmin, I.S.M. Zaidul, K. Ghafoor, S. Ferdosh, J. Jaffri, M.E. Ali, H. Mirhosseini, F.Y. Al-Juhaimi, V. Perumal, A. Khatib Jul 2020

Rapid Investigation Of Α-Glucosidase Inhibitory Activity Of Phaleria Macrocarpa Extracts Using Ftir-Atr Based Fingerprinting, S. Easmin, I.S.M. Zaidul, K. Ghafoor, S. Ferdosh, J. Jaffri, M.E. Ali, H. Mirhosseini, F.Y. Al-Juhaimi, V. Perumal, A. Khatib

Journal of Food and Drug Analysis

Phaleria macrocarpa, known as “Mahkota Dewa”, is a widely used medicinal plant in Malaysia. This study focused on the characterization of α-glucosidase inhibitory activity of P. macrocarpa extracts using Fourier transform infrared spectroscopy (FTIR)-based metabolomics. P. macrocarpa and its extracts contain thousands of compounds having synergistic effect. Generally, their variability exists, and there are many active components in meager amounts. Thus, the conventional measurement methods of a single component for the quality control are time consuming, laborious, expensive, and unreliable. It is of great interest to develop a rapid prediction method for herbal quality control to investigate the α-glucosidase inhibitory …

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Voltammetric Sensor For Tartrazine Determination In Soft Drinks Using Poly (P-Aminobenzenesulfonic Acid)/Zinc Oxide Nanoparticles In Carbon Paste Electrode, G. Karim-Nezhad, Z. Khorablou, M. Zamani, Dorraji P. Seyed, M. Alamgholiloo Jul 2020

Voltammetric Sensor For Tartrazine Determination In Soft Drinks Using Poly (P-Aminobenzenesulfonic Acid)/Zinc Oxide Nanoparticles In Carbon Paste Electrode, G. Karim-Nezhad, Z. Khorablou, M. Zamani, Dorraji P. Seyed, M. Alamgholiloo

Journal of Food and Drug Analysis

Zinc oxide nanoparticles (ZnO NPs) and p-aminobenzenesulfonic acid (p-ABSA) were used to fabricate a modified electrode, as a highly sensitive and selective voltammetric sensor, for the determination of tartrazine. A fast and easy method for the fabrication of poly p-ABSA (Pp-ABSA)/ZnO NPs-carbon paste electrode (Pp-ABSA/ZnO NPs-CPE) by cyclic voltammetry was used. By combining the benefits of Pp-ABSA, ZnO NPs, and CPE, the resulted modified electrode exhibited outstanding electrocatalytic activity in terms of tartrazine oxidation by giving much higher peak currents than those obtained for the unmodified CPE and also other constructed electrodes. The effects of various experimental parameters on the …

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Simultaneous Determination Of Ascorbic Acid And Caffeine In Commercial Soft Drinks Using Reversed-Phase Ultraperformance Liquid Chromatography, F. Turak, R. Güzel, E. Dinç Jul 2020

Simultaneous Determination Of Ascorbic Acid And Caffeine In Commercial Soft Drinks Using Reversed-Phase Ultraperformance Liquid Chromatography, F. Turak, R. Güzel, E. Dinç

Journal of Food and Drug Analysis

A new reversed-phase ultraperformance liquid chromatography method with a photodiode array detector was developed for the quantification of ascorbic acid (AA) and caffeine (CAF) in 11 different commercial drinks consisting of one energy drink and 10 ice tea drinks. Separation of the analyzed AA and CAF with an internal standard, caffeic acid, was performed on a Waters BEH C18 column (100 mm × 2.1 mm, 1.7 μm i.d.), using a mobile phase consisting of acetonitrile and 0.2M H3PO4 (11:89, v/v) with a flow rate of 0.25 mL/min and an injection volume of 1.0 μL. Calibration graphs for AA and CAF …

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