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Psidium guajava

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https://www.readbyqxmd.com/read/29037684/chitosan-delays-ripening-and-ros-production-in-guava-psidium-guajava-l-fruit
#1
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
https://www.readbyqxmd.com/read/29033964/management-of-fruit-species-in-urban-home-gardens-of-argentina-atlantic-forest-as-an-influence-for-landscape-domestication
#2
Violeta Furlan, María L Pochettino, Norma I Hilgert
Home gardens are considered germplasm repositories and places for experimentation, thus they are key sites for the domestication of plants. Domestication is considered a constant process that occurs along a continuum from wild to managed to domesticated populations. Management may lead to the modification of populations and in other cases to their distribution, changing population structure in a landscape. Our objective is focused on the management received in home gardens by perennial species of fruits. For this, the management practices applied to native and exotic perennial fruits species by a group of 20 women in the periurban zone of Iguazú, Argentina, were analyzed...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29020526/antioxidant-and-mercury-chelating-activity-of-psidium-guajava-var-pomifera-l-leaves-hydroalcoholic-extract
#3
Antonio Ivanildo Pinho, Cláudia Sirlene Oliveira, Fabricio Luís Lovato, Emily Pansera Waczuk, Bruna Candia Piccoli, Aline Augusti Boligon, Nadghia Figueredo Leite, Henrique Douglas Melo Coutinho, Thais Posser, João Batista Teixeira Da Rocha, Jeferson Luis Franco
Mercury (Hg) is widely distributed in the environment and is known to produce several adverse effects in organisms. The aim of the present study was to examine the in vitro antioxidant activity and Hg chelating ability of the hydroalcoholic extract of Psidium guajava leaves (HEPG). In addition, the potential protective effects of HEPG against Hg(II) were evaluated using a yeast model (Saccharomyces cerevisiae). HEPG was found to exert significant antioxidant activity in 2,2-diphenyl-1-picrylhydrazyl scavenger and inhibition of lipid peroxidation induced by Fe(II) assays in a concentration-dependent manner...
October 11, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28989253/psidium-guajava-a-single-plant-for-multiple-health-problems-of-rural-indian-population
#4
REVIEW
Poonam G Daswani, Manasi S Gholkar, Tannaz J Birdi
The rural population in India faces a number of health problems and often has to rely on local remedies. Psidium guajava Linn. (guava), a tropical plant which is used as food and medicine can be used by rural communities due to its several medicinal properties. A literature search was undertaken to gauge the rural health scenario in India and compile the available literature on guava so as to reflect its usage in the treatment of multiple health conditions prevalent in rural communities. Towards this, electronic databases such as Pubmed, Science Direct, google scholar were scanned...
July 2017: Pharmacognosy Reviews
https://www.readbyqxmd.com/read/28964367/characterization-of-phenolic-and-other-polar-compounds-in-peel-and-flesh-of-pink-guava-psidium-guajava-l-cv-criolla-by-ultra-high-performance-liquid-chromatography-with-diode-array-and-mass-spectrometric-detection
#5
Carolina Rojas-Garbanzo, Benno F Zimmermann, Nadine Schulze-Kaysers, Andreas Schieber
Pink guava (Psidium guajava L.) is a highly consumed fruit in tropical countries. Despite of interesting research on health effects of this fruit, investigations into the profile of secondary plant metabolites are scarce. In this study, the phenolic compounds in the peel and flesh of pink guava were characterized by ultra-high performance liquid chromatography with diode array and mass spectrometric detection. Sixty phenolic compounds were characterized by MS(2) and classified as ellagitannins, flavones, flavonols, flavanols, proanthocyanidins, dihydrochalcones, and anthocyanidins, and non-flavonoids such as phenolic acid derivatives, stilbenes, acetophenones, and benzophenones...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28963612/biochemical-and-hormonal-parameters-of-lambs-using-guava-psidium-guajava-l-agro-industrial-waste-in-the-diet
#6
Roberto G Costa, Neila L Ribeiro, Priscila T Nobre, Francisco F R Carvalho, Ariosvaldo N Medeiros, George R B Cruz, Luís F S Freire
The objective of this research was to evaluate the biochemical and hormonal parameters of Santa Inês sheep that received diets with different levels of guava agro-industrial waste (GAW). Forty non-castrated male animals of the Santa Inês breed were used, with an average initial weight of 21.3 ± 2.6 kg, and an average age of 120 days. The animals were distributed in a completely randomized design, with five treatments and eight replicates, and fed with increasing GAW levels replacing hay (0.0, 7.5, 15...
September 29, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28946269/effect-of-chitosan-and-alginate-based-coatings-enriched-with-pomegranate-peel-extract-to-extend-the-postharvest-quality-of-guava-psidium-guajava-l
#7
M Sneha Nair, Alok Saxena, Charanjit Kaur
The influence of chitosan (1% w/v) and alginate (2% w/v) coatings in combination with pomegranate peel extract (PPE; 1% w/v) on quality of guavas (cv Allahabad safeda) were studied. Restricted changes were recorded in respiration rate, ripening index, and instrumental colour values in case of the coated samples as compared to the control for 20days at 10°C. Samples coated with chitosan enriched with PPE (CHE) proved to be the most effective treatment in maintaining the overall fruit quality. Ascorbic acid, total phenolics, total flavonoids contents and antioxidant activity were recorded with restricted losses of 29%, 8%, 12%, 12% (DPPH) and 9% (FRAP), respectively for CHE samples at the end of storage...
February 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28941687/physicochemical-total-phenols-and-pectin-methylesterase-changes-on-quality-maintenance-on-guava-fruit-psidium-guajava-l-coated-with-candeuba-wax-solid-lipid-nanoparticles-xanthan-gum
#8
Claudia Idalid García-Betanzos, Humberto Hernández-Sánchez, Tanía Florencia Bernal-Couoh, David Quintanar-Guerrero, María de la Luz Zambrano-Zaragoza
The objective of this work was to evaluate the application of candeuba wax solid lipid nanoparticles (SLN) and xanthan gum (XG) as coatings on guava, and their effect on the fruit's physicochemical and nutritional parameters, complementing a previous publication carried out by Zambrano-Zaragoza et al. (2013). The concentrations of SLN were selected according to those reported as the most (65g/L) and least (75g/L) efficient in post-harvest life preservation, and were compared to a coating of XG and untreated control samples...
November 2017: Food Research International
https://www.readbyqxmd.com/read/28935551/anti-trypanosoma-anti-leishmania-and-cytotoxic-activities-of-natural-products-from-psidium-brownianum-mart-ex-dc-and-psidium-guajava-var-pomifera-analysed-by-lc-ms
#9
Celestina Elba Sobral de Souza, Ana Raquel Pereira da Silva, Maria Celeste Vega Gomez, Míriam Rolóm, Cathia Coronel, José Galberto Martins da Costa, Amanda K Sousa, Larissa A Rolim, Francisco Hugo Sobral de Souza, Henrique Douglas Melo Coutinho
Neglected diseases are those that are prevalent in developing countries, even with a rich biodiversity. These diseases still persist because of the lack of scientific studies, government negligence or failures of the public health system. This study aims to identify the composition of extracts and fractions from Psidium brownianum and Psidium guajava through LC-MS, to evaluate its in vitro anti-parasitic and cytotoxic activity against Trypanosoma cruzi, Leishmania brasiliensis and L. infantum epismastigote and promastigote forms, as well as mammalian cells...
December 2017: Acta Tropica
https://www.readbyqxmd.com/read/28871541/procedures-of-mitochondria-purification-and-gene-expression-to-study-alternative-respiratory-and-uncoupling-pathways-in-fruits
#10
Jurandi Gonçalves de Oliveira, Luis Miguel Mazorra Morales, Gláucia Michelle Cosme Silva, Kátia Daniella da Cruz Saraiva, Diederson Bortolino Santana, Clesivan Pereira Dos Santos, Marcos Goes Oliveira, José Hélio Costa
We describe detailed procedures to get intact and well-coupled mitochondria from a variety of fruit species such as papaya (Carica papaya), guava (Psidium guajava), tomato (Solanum lycopersicum), and strawberry (Fragaria x ananassa) as well as the protocols to assess the capacities of AOX and UCP pathways in intact fruit mitochondria. The procedures presented here were tested for the species mentioned above; their use with other types of fruits must be tested for yield of intact and active mitochondria. This is possible from individual adjustments...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28857481/fingerprint-profiles-of-flavonoid-compounds-from-different-psidium-guajava-leaves-and-their-antioxidant-activities
#11
Lu Wang, Yanan Wu, Qi Bei, Kan Shi, Zhenqiang Wu
Flavonoids are the main active components in Psidium guajava leaves and have many multi-physiological functions. In this study, the flavonoid compositions were identified in the Psidium guajava leaves samples using a high-performance liquid chromatography with time-of-flight electrospray ionization mass spectrometry method. A high-performance liquid chromatography fingerprint method, combined with chemometrics, was used to perform a quality assessment of the Psidium guajava leaves samples. The eight identified flavonoid compounds including rutin, isoquercitrin, quercetin-3-O-β-d-xylopyranoside, quercetin-3-O-α-l-arabinopyranoside, avicularin, quercitrin, quercetin, and kaempferol were used as the chemical markers...
August 31, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28829233/hydroethanolic-extract-of-psidium-guajava-leaf-for-induced-osteoarthritis-using-a-guinea-pig-model
#12
N Tanideh, Z Zare, A Jamshidzadeh, M Lotfi, Negar Azarpira, M Sepehrimanesh, O Koohi-Hosseinabadi
We investigated the therapeutic effects of an extract of Psidium guajava (guava) leaf on experimentally induced osteoarthritis in guinea pig. The left knee of 30 male guinea pigs was anesthetized and the cranial cruciate ligament was severed. The animals were followed for 8 weeks until osteoarthritis was confirmed by radiography and histopathology. Animals were divided randomly into five groups; group 1, the ligament was severed and untreated; group 2, the ligament was severed and treated with piascledine, an extract of soybean and avocado; group 3, the ligament was severed and treated with 200 mg/kg hydroethanolic extract of guava; group 4, the ligament was severed and treated with 400 mg/kg hydroethanolic extract of guava; and group 5, control animals without surgery or extracts...
August 22, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28757558/the-bionomics-of-the-cocoa-mealybug-exallomochlus-hispidus-morrison-hemiptera-pseudococcidae-on-mangosteen-fruit-and-three-alternative-hosts
#13
Murni Indarwatmi, Dadang Dadang, Sobir Ridwani, Endang Sri Ratna
The cocoa mealybug, Exallomochlus hispidus Morrison (Hemiptera: Pseudococcidae) is known to attack mangosteen, an important fruit export commodity for Indonesia. The mealybug is polyphagous, so alternative host plants can serve as a source of nourishment. This study aimed to record the bionomics of E. hispidus on mangosteen (Garcinia mangostana L.) and three alternative hosts, kabocha squash (Cucurbita maxima L.), soursop (Annona muricata, L.), and guava (Psidium guajava L.). First-instar nymphs of the E. hispidus were reared at room temperature on mangosteen, kabocha, soursop, and guava fruits until they developed into adults and produced nymphs...
July 25, 2017: Insects
https://www.readbyqxmd.com/read/28728376/effect-of-condensed-tannins-containing-ficus-infectoria-and-psidium-guajava-leaf-meal-mixture-supplementation-on-nutrient-metabolism-methane-emission-and-performance-of-lambs
#14
A K Pathak, Narayan Dutta, A K Pattanaik, V B Chaturvedi, K Sharma
Objective: The study was conducted to examine the effect of condensed tannins (CT) containing Ficus infectoria and Psidium guajava leaf meal mixture (LMM) supplementation on nutrient metabolism, methane emission and performance of lambs. Methods: Twenty four lambs of ~ 6 months age (average body weight 10.1±0.60 kg) were randomly divided into 4 dietary treatments (CT-0, CT-1, CT-1.5 and CT-2 containing 0, 1.0, 1.5 and 2.0 percent CT through LMM, respectively) consisting of 6 lambs each in a completely randomized design...
June 27, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28727747/plant-species-dispersed-by-galapagos-tortoises-surf-the-wave-of-habitat-suitability-under-anthropogenic-climate-change
#15
Diego Ellis-Soto, Stephen Blake, Alaaeldin Soultan, Anne Guézou, Fredy Cabrera, Stefan Lötters
Native biodiversity on the Galapagos Archipelago is severely threatened by invasive alien species. On Santa Cruz Island, the abundance of introduced plant species is low in the arid lowlands of the Galapagos National Park, but increases with elevation into unprotected humid highlands. Two common alien plant species, guava (Psidium guajava) and passion fruit (Passiflora edulis) occur at higher elevations yet their seeds are dispersed into the lowlands by migrating Galapagos tortoises (Chelonoidis spp.). Tortoises transport large quantities of seeds over long distances into environments in which they have little or no chance of germination and survival under current climate conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28725389/quality-versus-quantity-foraging-decisions-in-the-honeybee-apis-mellifera-scutellata-feeding-on-wildflower-nectar-and-fruit-juice
#16
Kyle Shackleton, Nicholas J Balfour, Hasan Al Toufailia, Roberto Gaioski, Marcela de Matos Barbosa, Carina A de S Silva, José M S Bento, Denise A Alves, Francis L W Ratnieks
Foraging animals must often decide among resources which vary in quality and quantity. Nectar is a resource that exists along a continuum of quality in terms of sugar concentration and is the primary energy source for bees. Alternative sugar sources exist, including fruit juice, which generally has lower energetic value than nectar. We observed many honeybees (Apis mellifera scutellata) foraging on juice from fallen guava (Psidium guajava) fruit near others foraging on nectar. To investigate whether fruit and nectar offered contrasting benefits of quality and quantity, we compared honeybee foraging performance on P...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28720961/valorizing-guava-psidium-guajava-l-seeds-through-germination-induced-carbohydrate-changes
#17
Cheng Xian Ling, Ying Ping Chang
Guava seeds are produced as a waste product by the guava processing industry. Their high carbohydrate contents may suit the carbohydrate needs of the feed sector but their high dietary fiber content limits their feed value. The feed values of fruit seeds can be improved through germination, which involves the mobilization of nutrients through seed enzymes and alters the seed carbohydrate composition. The changes of selected carbohydrates in guava (Psidium guajava L.) seeds brought by germination to those in red bean (Vigna angularis) and winter wheat (Triticum aestivum L...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28678960/aqueous-extract-of-psidium-guajava-leaves-phenolic-compounds-and-inhibitory-potential-on-digestive-enzymes
#18
Anderson A Simão, Tamara R Marques, Silvana Marcussi, Angelita D Corrêa
Leaves of Psidium guajava L. (guava) have been widely used in the popular way for prevention and treatment of various diseases. Thus, the objective of this study was to evaluate the inhibitory potential of leaves aqueous extract from three cultivars of P. guajava (Pedro Sato, Paluma and Século XXI) on α-amylase, α-glycosidase, lipase, and trypsin enzymes, in the presence or not of simulated gastric fluid and to determine the content of phenolic compounds by high performance liquid chromatography. All cultivars presented the same composition in phenolic compounds, but in different proportions...
June 29, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28667644/somatic-embryogenesis-in-guava-psidium-guajava-l-current-status-and-future-perspectives
#19
REVIEW
Madhu Kamle, Kwang-Hyun Baek
Guava (Psidium guajava L.) is a highly perishable fruit crop comparable to mango owing to its high medicinal value and intense aroma. The presence of high genetic variability limits the chances of further expansion of guava improvement using biotechnological interventions. Conventional methods of guava improvement encountered with restricted achievement in progress of disease resistant varieties because of existing high genetic variability in the germplasm. There is a considerable demand for the establishment of successful and efficient regeneration protocols via somatic embryogenesis...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28629407/antibacterial-activity-of-crude-extracts-of-some-south-african-medicinal-plants-against-multidrug-resistant-etiological-agents-of-diarrhoea
#20
Mary A Bisi-Johnson, Chikwelu L Obi, Babatunde B Samuel, Jacobus N Eloff, Anthony I Okoh
BACKGROUND: This study evaluated the antibacterial activity of some plants used in folklore medicine to treat diarrhoea in the Eastern Cape Province, South Africa. METHODS: The acetone extracts of Acacia mearnsii De Wild., Aloe arborescens Mill., A. striata Haw., Cyathula uncinulata (Schrad.) Schinz, Eucomis autumnalis (Mill.) Chitt., E. comosa (Houtt.) Wehrh., Hermbstaedtia odorata (Burch. ex Moq.) T.Cooke, Hydnora africana Thunb, Hypoxis latifolia Wight, Pelargonium sidoides DC, Psidium guajava L and Schizocarphus nervosus (Burch...
June 19, 2017: BMC Complementary and Alternative Medicine
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