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Psidium guajava

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https://www.readbyqxmd.com/read/28166947/effects-of-heat-stress-on-some-reproductive-parameters-of-male-cavie-cavia-porcellus-and-mitigation-strategies-using-guava-psidium-guajava-leaves-essential-oil
#1
Ferdinand Ngoula, Maryvonne Guemdjo Tekam, Augustave Kenfack, Cyrille D'Alex Tadondjou Tchingo, Sandrine Nouboudem, Herman Ngoumtsop, Borice Tsafack, Alexis Teguia, Pierre Kamtchouing, Marco Galeotti, Joseph Tchoumboue
Climate changes, particularly the increase of temperature are among the main causes behind the decline of fertility in humans as well as animals. In this study, the effects of heat stress on some reproductive parameters of male cavies and mitigation strategies using guava leaves essential oil (GLEO) were studied. For this purpose, 40 male cavies aged 2.5-3 months and weighing between 348 and 446g were divided into 4 groups of 10 animals each and subjected to the following temperatures: Ambient temperature (20-25°C) for the control group, 35°C for group 1, 45°C for group 2 and 45°C+100µl GLEO/kg body weight, administered by gavage to animals for group 3...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28163963/evaluation-of-the-potential-effect-of-allium-sativum-momordica-charantia-eugenia-jambolana-ocimum-sanctum-and-psidium-guajava-on-intestinal-p-glycoprotein-in-rats
#2
Devendra Kumar, Neerja Trivedi, Rakesh K Dixit
AIMS/BACKGROUND: This study was evaluated synergistic effect of a polyherbal formulation (PHF) of Allium sativum L., Eugenia jambolana Lam., Momordica charantia L., Ocimum sanctum Linn., and Psidium guajava L. on p-glycoprotein (Pgp) of intestine. These five herbs were traditionally used for diabetes. These herbs are commonly present in Ayurvedic product as antidiabetics in India. MATERIALS AND METHODS: PHF was prepared by five indigenous herbs. Different doses (50, 100 and 200 mg/kg/day) of were orally administered to Sprague-Dawley rats of different groups for multiple weeks except control groups...
January 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28149166/phenolic-composition-and-medicinal-usage-of-psidium-guajava-linn-antifungal-activity-or-inhibition-of-virulence
#3
Maria F B Morais-Braga, Joara N P Carneiro, Antonio J T Machado, Débora L Sales, Antonia T L Dos Santos, Aline A Boligon, Margareth L Athayde, Irwin R A Menezes, Djair S L Souza, José G M Costa, Henrique D M Coutinho
Psidium guajava is a Myrtaceae plant whose medicinal properties are recognized in several locations. The use of teas and tinctures prepared from their leaves has been used to combat infections caused by fungi of the genus Candida. In this study, aqueous extracts of leaves and hydroethanolic were tested to verify the antifungal potential and its chemical composition has been investigated. The microbiological assays were performed by broth microdilution to determine the minimum inhibitory concentration (MIC) and from these the minimum fungicidal concentration was performed (MFC) by subculturing on solid media...
February 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28093669/genetic-diversity-and-population-structure-of-anastrepha-striata-diptera-tephritidae-in-three-natural-regions-of-southwestern-colombia-using-mitochondrial-sequences
#4
Jenny Johana Gallo-Franco, Sandra Marcela Velasco-Cuervo, Elkin Aguirre-Ramirez, Ranulfo González Obando, Nancy Soraya Carrejo, Nelson Toro-Perea
Anastrepha striata is widely distributed across the Americas and is a pest of economically important crops, especially crops of the Myrtaceae family. Insect population structures can be influenced by the presence of physical barriers or characteristics associated with habitat differences. This study evaluated the effect of the Western Andes on the population structure of A. striata. Individuals were collected from Psidium guajava fruits from three natural regions of southwestern Colombia (Pacific Coast, mountainous region and the inter-Andean valley of the Cauca River)...
January 16, 2017: Genetica
https://www.readbyqxmd.com/read/27976180/anthelmintic-potential-of-psidium-guajava-in-sheep
#5
R Rostirolla Debiage, F M Ferreira Gonçalves, A Rodriges Pereira, R M Gonçalvez da Silva, E Yoshihara, E C Toledo de Mello Peixoto
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27845266/psidium-guajava-l-from-ethnobiology-to-scientific-evaluation-elucidating-bioactivity-against-pathogenic-microorganisms
#6
REVIEW
Maria Flaviana B Morais-Braga, Joara Nalyda P Carneiro, Antonio Júdson T Machado, Antonia Thassya L Dos Santos, Débora L Sales, Luciene F Lima, Fernando G Figueredo, Henrique Douglas M Coutinho
ETHNOPHARMACOLOGICAL RELEVANCE: The use of popular plants has guided pharmaceutical research aimed at combating pathogenic microorganisms. Psidium guajava L. is a plant of great versatility and it has been used both as food and as a therapeutic agent. Root, bark, leaves, fruits, flowers and seeds are used for medicinal purposes, especially in infusions and decoctions for oral and topical use. P. guajava is utilized in symptomatology treatment related to organ malfunction and of diseases caused by the action of pathogenic and/or opportunistic microorganisms...
December 24, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27797217/anticancer-properties-of-psidium-guajava-a-mini-review
#7
Mariana Goncalves Correa, Jessica Soldani Couto, Anderson Junger Teodoro
Cancer is a complex disease caused by a progressive accumulation of multiple genetic mutations. Consumption of fruits is associated with lower risk of several cancers, which is mainly associated to their phytochemical content. The use of functional foods and chemopreventive compounds seems to contribute in this process, acting by mechanisms of antioxidant, anti-inflammatory, anti-angiogenic and hormonal. The Psidium Guajava has high potential functional related to pigments who are involved in the process of cancer prevention by having antioxidant activity...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/27790420/effect-of-guava-in-blood-glucose-and-lipid-profile-in-healthy-human-subjects-a-randomized-controlled-study
#8
Suchitra Kumari, R Rakavi, Manaswini Mangaraj
INTRODUCTION: The fruit of Psidium guajava (P.guajava) is known to contain free sugars yet the fruit juice showed hypoglycaemic effect. Hypoglycaemic activity of guava leaves has been well documented but not for guava fruit. AIM: So we aimed to evaluate the effect of ripe guava (with peel and without peel) fruit supplementation on blood glucose and lipid profile in healthy human subjects. MATERIALS AND METHODS: Randomized Controlled study undertaken in: 1) Baseline; 2) 6 weeks supplementation phase...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27780121/psidium-guajava-l-leaves-as-source-of-proanthocyanidins-optimization-of-the-extraction-method-by-rsm-and-study-of-the-degree-of-polymerization-by-np-hplc-fld-esi-ms
#9
Elixabet Díaz-de-Cerio, Federica Pasini, Vito Verardo, Alberto Fernández-Gutiérrez, Antonio Segura-Carretero, Maria Fiorenza Caboni
Due to the importance of the proanthocyanidins (PAs) bioactivity and its relationship with the PAs degree of polymerization (DP), an experimental design was carried out to establish the best extraction conditions in order to evaluate the proanthocyanidins content and their degree of polymerization in Psidium guajava leaves at different oxidation state. Optimal conditions achieved by response surface methodology were 50% acetone/water (v/v), 48°C, 30min, and 0% acetic acid (v/v). The highest DP has been found in the low oxidized state (DP 13 plus the polymers)...
January 30, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27757267/evaluation-of-the-synergistic-effect-of-allium-sativum-eugenia-jambolana-momordica-charantia-ocimum-sanctum-and-psidium-guajava-on-hepatic-and-intestinal-drug-metabolizing-enzymes-in-rats
#10
Devendra Kumar, Neerja Trivedi, Rakesh K Dixit
AIMS/BACKGROUND: This study was to investigated the synergistic effect of polyherbal formulations (PHF) of Allium sativum L., Eugenia jambolana Lam., Momordica charantia L., Ocimum sanctum Linn., and Psidium guajava L. in the inhibition/induction of hepatic and intestinal cytochrome P450 (CYPs) and Phase-II conjugated drug metabolizing enzymes (DMEs). Consumption of these herbal remedy has been extensively documented for diabetes treatment in Ayurveda. METHODOLOGY: PHF of these five herbs was prepared, and different doses were orally administered to Sprague-Dawley rats of different groups except control group...
September 2016: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/27739322/a-possible-glycosidic-benzophenone-with-full-substitution-on-b-ring-from-psidium-guajava-leaves
#11
Alessandro Venditti, Stanley E Ukwueze
Bidimensional NMR analysis may be a useful tool to resolve the structure of chemical compounds also in mixture. This letter would demonstrate how these techniques could be applied e.g. to the reported case on identification of benzophenone glycoside from Psidium guajava. A tentative structure for the secondary component, not yet described, was possibly proposed on the basis of observation and critic review of available 1D and 2D NMR spectra.
April 2017: Natural Product Research
https://www.readbyqxmd.com/read/27723640/antimicrobial-efficacy-of-the-combinations-of-acacia-nilotica-murrayakoenigii-linn-sprengel-eucalyptus-and-psidiumguajava-on-primary-plaque-colonizers-an-in-vitro-study
#12
Byalakere Rudraiah Chandra Shekar, Ramesh Nagarajappa, Rupal Singh, S Suma, Rupesh Thakur
BACKGROUND: The rise in disease incidence, increased resistance of pathogenic bacteria to currently used antibiotics and chemotherapeutics, opportunistic infections in immunocompromised individuals, and financial considerations in developing countries necessitates alternate preventive and treatment strategies for oral diseases. OBJECTIVE: The objective of the study is to assess the antimicrobial efficacy of triple and quadruple combinations of Acacia nilotica (AN), Murraya koenigii (Linn...
July 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27702676/oreochromis-mossambicus-diet-supplementation-with-psidium-guajava-leaf-extracts-enhance-growth-immune-antioxidant-response-and-resistance-to-aeromonas-hydrophila
#13
Narayanan Gobi, Chinnu Ramya, Baskaralingam Vaseeharan, Balasubramanian Malaikozhundan, Sekar Vijayakumar, Kadarkarai Murugan, Giovanni Benelli
In this research, we focused on the efficacy of aqueous and ethanol leaf extracts of Psidium guajava L. (guava) based experimental diets on the growth, immune, antioxidant and disease resistance of tilapia, Oreochromis mossambicus following challenge with Aeromonas hydrophila. The experimental diets were prepared by mixing powdered (1, 5 and 10 mg/g) aqueous and ethanol extract of guava leaf with commercial diet. The growth (FW, FCR and SGR), non-specific cellular immune (myeloperoxidase activity, reactive oxygen activity and reactive nitrogen activity) humoral immune (complement activity, antiprotease, alkaline phosphatase activity and lysozyme activity) and antioxidant enzyme responses (SOD, GPX, and CAT) were examined after 30 days of post-feeding...
November 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27638949/co-infestation-and-spatial-distribution-of-bactrocera-carambolae-and-anastrepha-spp-diptera-tephritidae-in-common-guava-in-the-eastern-amazon
#14
E G Deus, W A C Godoy, M S M Sousa, G N Lopes, C R Jesus-Barros, J G Silva, R Adaime
Field infestation and spatial distribution of introduced Bactrocera carambolae Drew and Hancock and native species of Anastrepha in common guavas [Psidium guajava (L.)] were investigated in the eastern Amazon. Fruit sampling was carried out in the municipalities of Calçoene and Oiapoque in the state of Amapá, Brazil. The frequency distribution of larvae in fruit was fitted to the negative binomial distribution. Anastrepha striata was more abundant in both sampled areas in comparison to Anastrepha fraterculus (Wiedemann) and B...
2016: Journal of Insect Science
https://www.readbyqxmd.com/read/27621735/guava-waste-to-sustain-guava-psidium-guajava-agroecosystem-nutrient-balance-concepts
#15
Henrique A Souza, Serge-Étienne Parent, Danilo E Rozane, Daniel A Amorim, Viviane C Modesto, William Natale, Leon E Parent
The Brazilian guava processing industry generates 5.5 M Mg guava waste year(-1) that could be recycled sustainably in guava agro-ecosystems as slow-release fertilizer. Our objectives were to elaborate nutrient budgets and to diagnose soil, foliar, and fruit nutrient balances in guava orchards fertilized with guava waste. We hypothesized that (1) guava waste are balanced fertilizer sources that can sustain crop yield and soil nutrient stocks, and (2) guava agroecosystems remain productive within narrow ranges of nutrient balances...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27608288/electrostatic-spraying-in-the-chemical-control-of-triozoida-limbata-enderlein-hemiptera-triozidae-in-guava-trees-psidium-guajava-l
#16
Rafael M Tavares, João P A R Cunha, Thales C Alves, Mariana R Bueno, Sérgio M Silva, César H S Zandonadi
BACKGROUND: Due to the difficulty in reaching targets during pesticide applications on guava trees, it is important to evaluate new technologies that may improve pest management. In electrostatic spraying, an electric force is added to the droplets to control their movements such that they are efficiently directed to the target. The present study evaluated the performance of electrostatic and non-electrostatic spraying in the control of the guava psyllid, the deposition of the spray mixture on the leaves, and the losses to the soil...
September 8, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27605980/intestinal-ameliorative-effects-of-traditional-ogi-tutu-vernonia-amygdalina-and-psidium-guajava-in-mice-infected-with-vibrio-cholera
#17
Olufunke B Shittu, Olusola L Ajayi, Samuel O Bankole, Temitope Os Popoola
BACKGROUND: Cholera, a severe acute watery diarrhea caused by Vibrio cholerae is endemic in Nigeria with most cases occurring in the rural areas. In South West Nigeria, some individuals resort to alternative treatments such as Ogi-tutu, Psidium guajava and Vernonia amygdalina during infections. The effectiveness of these alternatives in the prevention and treatment of V. cholerae infection requires experimental investigation. OBJECTIVE: This study was designed to investigate the ameliorative effects of Ogi-tutu, Vernonia amygdalina and Psidium guajava on intestinal histopathology of experimental mice infected with V...
June 2016: African Health Sciences
https://www.readbyqxmd.com/read/27591705/tropical-trees-are-they-good-alternatives-for-biomonitoring-the-atmospheric-level-of-potential-toxic-elements-near-to-the-brazilian-atlantic-rainforest
#18
Ricardo K Nakazato, Mirian C S Rinaldi, Marisa Domingos
The foliar accumulation and enrichment factor for 36 elements were studied in Psidium guajava 'Paluma' (fruit tropical tree) and Tibouchina pulchra Cogn. (native tree of the Atlantic rainforest) plants exposed around the city of Cubatão/Brazil, to propose a biomonitoring species in the Atlantic rainforest. The field experiments were conducted in six sites from November/2009 to April/2011. Parallel exposures of plants to filtered air in open-top chambers were performed to determine the background leaf concentrations of all elements...
August 31, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27586698/cytotoxic-meroterpenoids-with-rare-skeletons-from-psidium-guajava-cultivated-in-temperate-zone
#19
Xu-Jie Qin, Huan Yan, Wei Ni, Mu-Yuan Yu, Afsar Khan, Hui Liu, Hong-Xia Zhang, Li He, Xiao-Jiang Hao, Ying-Tong Di, Hai-Yang Liu
Three new meroterpenoids, guajavadials A-C (1-3), were isolated from Psidium guajava cultivated in temperate zone. Their structures were established by extensive spectroscopic evidence and electronic circular dichroism (ECD) calculations. Guajavadial A (1) represents a novel skeleton of the 3,5-diformylbenzyl phloroglucinol-coupled monoterpenoid, while guajavadials B (2) and C (3) are new adducts of the 3,5-diformylbenzyl phloroglucinol and a sesquiterpene with different coupling models. The plausible biosynthetic pathways as well as antimicrobial and cytotoxic activities of these meroterpenoids are also discussed...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27586434/do-fruit-ripening-volatiles-enable-resource-specialism-in-polyphagous-fruit-flies
#20
John Paul Cunningham, Mikael A Carlsson, Tommaso F Villa, Teun Dekker, Anthony R Clarke
Frugivorous tephritid fruit flies have lineages with high levels of host generalism. These insects use olfaction to locate fruits, but how they are able to recognize the odors of so many different host species is poorly understood. We used a series of behavioral experiments to investigate the role of fruit ripening volatiles as host cues in the Queensland fruit fly, Bactrocera tryoni (Froggatt), a polyphagous pest in Australia. Odors of mature guava (Psidium guajava) attracted female and male flies more strongly than three other ripening stages and guava pulp...
September 2016: Journal of Chemical Ecology
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