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Psidium guajava

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https://www.readbyqxmd.com/read/29600652/-study-on-antioxidant-activity-of-flavonoids-from-leaves-of-psidium-guajava
#1
Yu-Jing Zhao, Jian-Kuan Li, Xin Zhang, Jian-Ping Gao
The present study is to study the chemical constituents from ethanol extract of Psidium guajava leaves. The constituents were separated and purified by silica gel column chromaiographios over, macroporous resin D-101, Sephadex LH-20, and ODS. Six flavonoids compounds were isolated and identified as quercetin(1), quercetin-3- O - α -D-arabinopyranoside(2), quercetin-3- O - α -D-ribopyranoside(3), quercetin-3- O - β -D-galactopyranoside(4), quercetin-3- O - α -D-glucopyranoside(5), and quercetin-3- O - α- D-xylpyranoside(6)...
February 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29576705/antibacterial-activity-of-azadirachta-indica-pongamia-pinnata-psidium-guajava-and-mangifera-indica-and-their-mechanism-of-action-against-streptococcus-mutans
#2
Dikonketso Cathrine Bodiba, Preety Prasad, Ajay Srivastava, Brigdet Crampton, Namrita Sharan Lall
Background: Curative plants have reportedly been used to make chewing sticks/toothbrushes intended for the treatment of oral diseases. Objective: The in vitro antibacterial activities of Azadirachta indica , Pongamia pinnata , Psidium guajava , and Mangifera indica were evaluated against Streptococcus mutans , along with the cytotoxicity and antioxidant and synergistic potentials. The effect of M. indica on the expression of crucial virulence genes spaP and gtfB of S...
January 2018: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29576694/hypolipidemic-effect-of-psidium-guajava-leaf-extract-against-hepatotoxicity-in-rats
#3
K Vijayakumar, R L Rengarajan, R Radhakrishnan, A Vijaya Anand
Background: Plant-based natural extracts cure several diseases in human. However, the extract of Psidium guajava leaf is not yet evaluated on changes of lipid profile in hepatic disease affected rats. Objective: The present study was aimed to evaluate the mitigation effect of the ethanolic extract of P. guajava leaf and its isolated quercetin fraction on hepatotoxic rats. Materials and Methods: Carbon tetrachloride (CCl4 ) was injected to rats for hepatic disease induction and silymarin drug was used as positive control to compare plant ethanolic extract...
January 2018: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29548852/antiparasitic-effect-of-the-psidium-guajava-l-guava-and-psidium-brownianum-mart-ex-dc-ara%C3%A3-%C3%A3-de-veado-extracts
#4
Antonio J T Machado, Antonia T L Santos, Gioconda M A B Martins, Rafael P Cruz, Maria do S Costa, Fábia F Campina, Maria A Freitas, Camila F Bezerra, Antonio L A B Leal, Joara N P Carneiro, Cathia Coronel, Miriam Rolón, Celeste V Gómez, Henrique D M Coutinho, Maria F B Morais-Braga
In the search for new therapeutic agents against neglected diseases, both aqueous and hydroethanolic extracts from Psidium guajava L. and P. brownianum Mart ex DC leaves were investigated regarding their antiparasitic effect and cytotoxic potential. The extracts were tested at three concentrations (250, 500 and 1000 μg/mL) against Trypanosoma cruzi epimastigote forms (Chagas, 1909), Leishmania braziliensis (Vianna, 1911) and L. infantum promastigotes forms (Nicolle, 1908), as well as against fibroblasts...
March 13, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29525084/characterization-antioxidant-and-antimicrobial-activities-of-green-synthesized-silver-nanoparticles-from-psidium-guajava-l-leaf-aqueous-extracts
#5
Lu Wang, Yanan Wu, Jia Xie, Sheng Wu, Zhenqiang Wu
The green synthesis of nanoparticles has become increasingly promising due to their potential applications in nanomedicine and materials science. In this study, silver nanoparticles (P-AgNPs) were synthesized from aqueous extracts of P. guajava L. leaf. The synthesized silver nanoparticles were confirmed by UV-vis spectrophotometry at 438 nm. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and zetasizer analyses showed that the average sizes of the P-AgNPs were 20-35 nm, 25 nm, and 25-35 nm, respectively...
May 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29500752/attractiveness-of-host-plant-volatile-extracts-to-the-asian-citrus-psyllid-diaphorina-citri-is-reduced-by-terpenoids-from-the-non-host-cashew
#6
Marilene Fancelli, Miguel Borges, Raul A Laumann, John A Pickett, Michael A Birkett, Maria C Blassioli-Moraes
Diaphorina citri is a vector of the bacterial causative agent of Huanglongbing (HLB = Citrus greening), a severe disease affecting citrus crops. As there is no known control for HLB, manipulating insect behaviour through deployment of semiochemicals offers a promising opportunity for protecting citrus crops. The behavioural responses of D. citri to plant volatiles, and the identity of these plant volatiles were investigated. Volatiles were collected from host plants Murraya paniculata, Citrus sinensis, C...
March 2, 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29495514/quantification-of-phenolic-compounds-and-in-vitro-radical-scavenging-abilities-with-leaf-extracts-from-two-varieties-of-psidium-guajava-l
#7
Julio César Camarena-Tello, Héctor Eduardo Martínez-Flores, Ma Guadalupe Garnica-Romo, José Saúl Padilla-Ramírez, Alfredo Saavedra-Molina, Osvaldo Alvarez-Cortes, María Carmen Bartolomé-Camacho, José Octavio Rodiles-López
Guava leaf ( Psidium guajava L.) extracts are used in both traditional medicine and the pharmaceutical industry. The antioxidant compounds in P. guajava leaves can have positive effects including anti-inflammatory, anti-hyperglycemic, hepatoprotective, analgesic, anti-cancer effects, as well as protecting against cardiovascular diseases. In the present study, phenolic compounds and in vitro antioxidant capacity were measured in extracts obtained with polar and non-polar solvents from leaves of two varieties of guava, Calvillo Siglo XXI and Hidrozac...
February 27, 2018: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29477369/medicinal-plants-used-by-the-people-of-nsukka-local-government-area-south-eastern-nigeria-for-the-treatment-of-malaria-an-ethnobotanical-survey
#8
Uchenna E Odoh, Philip F Uzor, Chidimma L Eze, Theophine C Akunne, Chukwuma M Onyegbulam, Patience O Osadebe
ETHNOBOTANICAL RELEVANCE: Malaria is a serious public health problem especially in sub-Saharan African countries such as Nigeria. The causative parasite is increasingly developing resistance to the existing drugs. There is urgent need for alternative and affordable therapy from medicinal plants which have been used by the indigenous people for many years. AIM OF STUDY: This study was conducted to document the medicinal plant species traditionally used by the people of Nsukka Local Government Area in south-eastern Nigeria for the treatment of malaria...
February 28, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29455277/guava-psidium-guajava-l-cv-red-suprema-crude-extract-protect-human-dermal-fibroblasts-against-cytotoxic-damage-mediated-by-oxidative-stress
#9
José M Alvarez-Suarez, Francesca Giampieri, Massimiliano Gasparrini, Luca Mazzoni, Tamara Y Forbes-Hernández, Sadia Afrin, Maurizio Battino
We analyzed guava fruits (Psidium guajava L. cv. Red Suprema) from Cuba to determine their chemical composition, total antioxidant capacity, as well as their protective effect against oxidative damage using an in vitro model of human dermal fibroblasts. The guava fruit is a natural source of bioactive compounds, such as polyphenols, vitamin C, folates and beta carotenes with proven health benefits. Human dermal fibroblasts were pre-incubated with different concentrations of guava crude extract and then subjected to oxidative stress using the AAPH stressor...
February 17, 2018: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/29433206/lycopene-rich-extract-from-red-guava-psidium-guajava-l-displays-cytotoxic-effect-against-human-breast-adenocarcinoma-cell-line-mcf-7-via-an-apoptotic-like-pathway
#10
Raimunda C Dos Santos, Alicia S Ombredane, Jéssica Maria T Souza, Andreanne G Vasconcelos, Alexandra Plácido, Adriany das G N Amorim, Eder Alves Barbosa, Filipe C D A Lima, Cristina D Ropke, Michel M M Alves, Daniel D R Arcanjo, Fernando A A Carvalho, Cristina Delerue-Matos, Graziella A Joanitti, José Roberto de S A Leite
This study investigated a lycopene-rich extract from red guava (LEG) for its chemical composition using spectrophotometry, mass spectrometry, attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), and computational studies. The cytotoxic activity of LEG and the underlying mechanism was studied in human breast adenocarcinoma cells (MCF-7), murine fibroblast cells (NIH-3T3), BALB/c murine peritoneal macrophages, and sheep blood erythrocytes by evaluating the cell viability with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method and flow cytometry...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29433194/uplc-qtof-ms-profiling-of-two-psidium-species-and-the-in-vivo-hepatoprotective-activity-of-their-nano-formulated-liposomes
#11
Fatema R Saber, Ghada A Abdelbary, Maha M Salama, Dalia O Saleh, Magda M Fathy, Fathy M Soliman
Liver diseases are major health problem in Egypt influencing lifestyle and economy. The demand for nutraceutical hepatoprotective agents is crucial to ameliorate the side effects of synthetic drugs. The present study aims to evaluate antioxidant and hepatoprotective activities of extracts of Psidium guajava L. and Psidium cattleianum Sabine leaves and their nano-formulated liposomes against paracetamol-induced liver damage in rats. Secondary metabolites profile of P. guajava and P. cattleianum leaves was investigated using UPLC-PDA-ESI-qTOF-MSn...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29407781/use-of-glm-approach-to-assess-the-responses-of-tropical-trees-to-urban-air-pollution-in-relation-to-leaf-functional-traits-and-tree-characteristics
#12
Arideep Mukherjee, Madhoolika Agrawal
Responses of urban vegetation to air pollution stress in relation to their tolerance and sensitivity have been extensively studied, however, studies related to air pollution responses based on different leaf functional traits and tree characteristics are limited. In this paper, we have tried to assess combined and individual effects of major air pollutants PM 10 (particulate matter ≤ 10 µm), TSP (total suspended particulate matter), SO 2 (sulphur dioxide), NO 2 (nitrogen dioxide) and O 3 (ozone) on thirteen tropical tree species in relation to fifteen leaf functional traits and different tree characteristics...
February 1, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29355095/beneficial-effects-of-consumption-of-acerola-cashew-or-guava-processing-by-products-on-intestinal-health-and-lipid-metabolism-in-dyslipidaemic-female-wistar-rats
#13
Kamila Sabino Batista, Adriano Francisco Alves, Marcos Dos Santos Lima, Laiane Alves da Silva, Priscilla Paulo Lins, Jéssyca Alencar de Sousa Gomes, Alexandre Sérgio Silva, Lydiane Tavares Toscano, Bruno Raniere Lins de Albuquerque Meireles, Angela Maria Tribuzy de Magalhães Cordeiro, Maria Lúcia da Conceição, Evandro Leite de Souza, Jailane de Souza Aquino
This study assessed the effects of diet supplementation with industrial processing by-products of acerola (Malpighia emarginata D.C.), cashew (Anacardium occidentale L.) and guava (Psidium guajava L.) fruit on the intestinal health and lipid metabolism of female Wistar rats with diet-induced dyslipidaemia. Female rats were randomly divided into five groups: healthy control, dyslipidaemic control and dyslipidaemic experimental receiving acerola, cashew or guava processing by-products. Fruit processing by-products were administered (400 mg/kg body weight) via orogastric administration for 28 consecutive days...
January 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29333046/development-and-validation-of-high-performance-thin-layer-chromatography-method-for-simultaneous-determination-of-polyphenolic-compounds-in-medicinal-plants
#14
C V Jayachandran Nair, Sayeed Ahamad, Washim Khan, Varisha Anjum, Rajani Mathur
Context: Quantitative standardization of plant-based products is challenging albeit essential to maintain their quality. Aims: This study aims to develop and validate high-performance thin-layer chromatography (HPTLC) method for the simultaneous determination of rutin (Ru), quercetin (Qu), and gallic acid (Ga) from Psidium guajava Linn. (PG) and Aegle marmelos (L.) Correa. (AM) and correlate with antioxidant activity. Materials and Methods: The stock solution (1 mg/mL) of standard Ru, Qu, and Ga in methanol: Water (1:1) was serially diluted and spotted (5 μL) on slica gel 60 F254 thin-layer chromatography plates...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29274417/chemical-profile-of-a-polysaccharide-from-psidium-guajava-leaves-and-it-s-in-vivo-antitussive-activity
#15
Sadhana Khawas, Veronika Sivová, Namrata Anand, Kaushik Bera, Bimalendu Ray, Gabriela Nosáľová, Sayani Ray
Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity, the specific molecule responsible for this remains unidentified. Herein, we report chemical profile and antitussive activity of its water extract (WE) and a polysaccharide (F1) present therein. This polysaccharide (F1), purified from WE by precipitation with ethanol and then through Cu(II)acetate, contains Ara, Gal, Rha, Glc and GalA residues, and has a molecular mass of 156 kDa...
April 1, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29182924/control-of-anthracnose-caused-by-colletotrichum-species-in-guava-mango-and-papaya-using-synergistic-combinations-of-chitosan-and-cymbopogon-citratus-d-c-ex-nees-stapf-essential-oil
#16
Priscila Dinah Lima Oliveira, Kataryne Árabe Rimá de Oliveira, Willie Anderson Dos Santos Vieira, Marcos Paz Saraiva Câmara, Evandro Leite de Souza
This study assessed the efficacy of chitosan (Chi) and Cymbopogon citratus (D.C. ex Nees) Stapf. essential oil (CCEO) combinations to control the mycelial growth of five pathogenic Colletotrichum species (C. asianum, C. siamense, C. fructicola, C. tropicale and C. karstii) in vitro, as well as the anthracnose development in guava (Psidium guajava L.) cv. Paluma, mango (Mangifera indica L.) cv. Tommy Atkins and papaya (Carica papaya L.) cv. Papaya artificially inoculated with these species. Combinations of Chi (2...
February 2, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29166193/traditional-method-of-initial-diarrhea-treatment-in-children
#17
Kristian Ade Chandra, Dessie Wanda
Diarrhea is the most common cause of death in children. For diarrhea, home treatment should be administered by parents to prevent diarrheal complications. The purpose of this research was to investigate the traditional method of diarrhea treatment in Tegal regency, Central Java, Indonesia. A descriptive study was conducted with the aim of describing the traditional method of home treatment for diarrhea in children. The study sample included families with children who were experiencing or had experienced diarrhea and had received traditional medicine...
2017: Comprehensive Child and Adolescent Nursing
https://www.readbyqxmd.com/read/29101063/anti-staphylococcal-properties-of-four-plant-extracts-against-sensitive-and-multi-resistant-bacterial-strains-isolated-from-cattle-and-rabbits
#18
Mayra Fernanda Echeverría Medina, Peter Adeniyi Alaba, María Elena Estrada-Zuñiga, Valente Velázquez-Ordoñez, Alberto Barbabosa-Pliego, Mohmaed Z M Salem, María Uxúa Alonso-Fresán, Luis Miguel Camacho-Díaz, Abdelfattah Z M Salem
The aim of this study is to investigate the biopotency of methanolic extracts of Vitex mollis, Psidium guajava, Dalbergia retusa, and Crescential alata leaves against various staphylococcal strains isolated from cattle and rabbits. Methicillin-resistant S. aureus strains were isolated from cattle, while other strains were isolated from rabbits using standard methodology. The total phytochemical phenolic and saponins contents were obtained being the main groups of the antinutritional factors. The antimicrobial activity of the extracts against the standard culture of S...
December 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29080615/antiviral-activity-of-five-asian-medicinal-pant-crude-extracts-against-highly-pathogenic-h5n1-avian-influenza-virus
#19
Benjaporn Sornpet, Teerapong Potha, Yingmanee Tragoolpua, Kidsadagon Pringproa
OBJECTIVE: To study the antiviral properties of the five Asian medicinal plants against in vitro infection by the highly pathogenic avian influenza virus (H5N1). METHODS: Crude extracts of Andrographis paniculata, Curcuma longa (C. longa), Gynostemma pentaphyllum, Kaempferia parviflora (K. parviflora), and Psidium guajava obtained by both water and ethanol extractions were investigated for their cytotoxicity in the Madin-Darby canine kidney cells. Thereafter, they were investigated in vitro for antiviral activity and cytokine response upon H5N1 virus infection...
September 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29037684/chitosan-delays-ripening-and-ros-production-in-guava-psidium-guajava-l-fruit
#20
Willian Batista Silva, Gláucia Michelle Cosme Silva, Diederson Bortolini Santana, Acácio Rodrigues Salvador, David Barbosa Medeiros, Ikram Belghith, Natália Martins da Silva, Maria Helena Menezes Cordeiro, Gisele Polete Misobutsi
Guava is a typically tropical fruit highly perishable with a short shelf-life due to intense metabolic activity after harvested. In attempt to minimize the problems related to the postharvest, we evaluated the physiochemical characteristics and antioxidant system in guava fruits under chitosan coating at concentrations of 1%, 2%, and 3% stored at 25°C during 96h. The chitosan suppressed the respiratory rate, fresh weight loss, firmness and skin color with delay in the degradation of chlorophyll. In the treatment with 2% and 3% of chitosan in the solid soluble content and ascorbic acid were reduced; retarded the loss of titratable acidity during 96h after treatment...
March 1, 2018: Food Chemistry
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