Academic literature on the topic 'Floral preservative'
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Journal articles on the topic "Floral preservative"
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Menegaes, Janine Farias, Henrique Fernando Lidório, Rogério Antonio Bellé, Sidinei José Lopes, Fernanda Alice Antonello Londero Backes, and Ubirajara Russi Nunes. "Pós-colheita de hastes florais de cártamo colhidas em diferentes épocas e submetidas a diferentes soluções conservantes." Ornamental Horticulture 25, no. 1 (March 26, 2019): 87–96. http://dx.doi.org/10.14295/oh.v25i1.1989.
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The conservation of the cut flower stems aims to prolong durability, maintain the quality and reduce the losses after harvest, providing a greater period of lifespan and commercialization. Thus, the objective of this work was to evaluate the quality and durability in post-harvest of fresh safflower (Carthamus tinctorius L.) flower stems harvested in different times and submitted to different preservative solutions. The experiment was conducted in entirely randomized design and, organized in 4x8 (four preservative solutions and eight harvest seasons) factorial scheme, with four repetitions, and each experimental unit consisting of five floral stems. The cultivation of floral stems of safflower occurred at Floriculture Sector and the harvest seasons of them were carried out in the beginning of flowering from the sowing performed in the first seasonal half: in winter, spring and summer of 2016, autumn, winter, spring and summer of 2017 and autumn of 2018. And, the preservative solutions were: distilled water (control); distilled water + sucrose 2%; distilled water + sodium hypochlorite 2% and distilled water + sucrose 2% + sodium hypochlorite 2%. The floral stems were evaluated in relation to quality notes, dehydration and absorption of preservative solutions. We observed that the floral stems of safflower presented shelf life in average of nine days, with absorption of solution in average of 0.021 mL day-1 g-1 of fresh mass and that the use of preservatives was not beneficial to conservation in post-harvest.
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Knee, Michael, Peg McMahon, and Glenn Carey. "A Question for the Class: Why Do Roses Die?" HortScience 30, no. 4 (July 1995): 835D—835. http://dx.doi.org/10.21273/hortsci.30.4.835d.
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An undergraduate class in postharvest physiology observed a number of factors in the senescence of cut roses, which had been studied separately in the literature. They assessed the relative importance of the factors in determining vase life. `Samantha' roses were held at 20C in distilled water or a floral preservative. Ethylene treatment caused petal distortion and premature senescence. Floral preservatives stimulated ethylene production, although vase life was extended relative to flowers in water. Higher sugar contents and respiration were maintained in preservative than in water. Water uptake by roses was almost constant, but stem resistance to water flow increased faster in water than in preservative. In the 2nd week of vase life, transpiration exceeded water uptake, particularly for roses in water. As much of this water was lost through leaves as through the flower. The results suggest that a complex interaction of several factors determines vase life.
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Jones, Michelle L., Kenneth K. Cochran, Gary A. Anderson, and David C. Ferree. "Effects of Preservatives and Cold Storage on Postharvest Performance of Deciduous Holly Branches." HortTechnology 14, no. 2 (January 2004): 230–34. http://dx.doi.org/10.21273/horttech.14.2.0230.
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Deciduous holly branches were visually rated over a period of 5 weeks to evaluate differences in display life between various cultivars of winterberry (Ilex verticillata) and japanese winterberry (I. serrata) x winterberry. Holly branches were naturally defoliated and the postharvest performance of the cut branches was therefore based on the quality and longevity of the fruit. Chemical treatments including floral preservative, floral preservative plus silver, and anti-transpirant were also evaluated. `Bonfire' and `Sunset' had the highest ratings for marketability based on the longevity and quality of their fruit. `Bonfire' and `Winter Red' had the highest fruit density per stem. Treatment with floral preservatives significantly increased the display life of holly branches. Preservative plus silver delayed deterioration later in the study, presumably by delaying the senescence of the fruit. Anti-transpirant treatment did not decrease solution uptake by the holly stems. Cold storage of dry branches at 0.00 ± 1.11 °C (32.0 ± 2.0 °F) did not significantly reduce branch display life if held for 23 days or less. Cut branches of all cultivars had a longer display life when stuck in sand and left outdoors in a lath house than when rated in vase solutions indoors. This study indicates that deciduous holly branches provide an attractive alternative cut branch for both interior and outdoor holiday displays.
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Ahmad, Iftikhar, John M. Dole, and Bruno T. Favero. "Pulsing With Low Concentration Gibberellin Plus Benzyladenine or Commercial Floral Preservatives Affect Postharvest Longevity, Quality, and Leaf Chlorosis of Cut Lilies and Gladioli." HortTechnology 24, no. 5 (October 2014): 560–64. http://dx.doi.org/10.21273/horttech.24.5.560.
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Effects of pulsing with different concentrations of gibberellin plus benzyladenine (GA4+7 + BA), a proprietary mixture of GA4+7 plus BA in a commercial floral preservative (GA4+7 + BA + preservative), or a propriety mixture of sugar plus acidifier developed for bulbous flowers (floral bulb preservative) were studied on postharvest performance and quality of cut lily (Lilium hybrids) and gladiolus (Gladiolus hybrids) flowers. Pulsing of cut stems of lily with GA4+7 + BA at 5 or 2 mL·L−1 GA4+7 + BA + preservative for 20 hours at 3 ± 1 °C extended the vase life and controlled leaf chlorosis of ‘Cobra’ oriental lily and ‘Cappuccino’ and ‘Dot Com’ asiatic lily. Cut ‘Orange Art’ asiatic lily performed best when pulsed with GA4+7 + BA at 10 mg·L−1. For cut gladiolus, pulsing with GA4+7 + BA at 10 mg·L−1 extended the vase life of ‘Alice’, ‘Mammoth’, and ‘Passion’, while ‘Scarlet’ had the longest vase life when pulsed with 5 mg·L−1 GA4+7 + BA. GA4+7 + BA + preservative also extended the vase life and controlled leaf chlorosis, but the floral bulb preservative had no effect on vase life extension or preventing leaf chlorosis of lilies. Gladiolus cultivars had no or minor leaf chlorosis during vase period. Overall, overnight pulsing with GA4+7 + BA or GA4+7 + BA + preservative extended the vase life and prevented leaf chlorosis and can be used by growers and wholesalers for maintaining quality of cut stems.
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Oliveira Souza Alves, Ana Maria, Jaianne Francielle Oliveira Santos Pimentel, Gustavo Ferreira Da Silva, Nilbe Carla Mapeli, and Ana Maria Mapeli. "Non-structural carbohydrate metabolism and postharvest conservation of gerbera flowers." Ornamental Horticulture 23, no. 3 (October 3, 2017): 329. http://dx.doi.org/10.14295/oh.v23i3.1079.
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The species Gerbera jamesonii Adlam has great economic importance in the ornamental sector, due to exuberance of floral stems. However, florists face some challenges such as postharvest handling and difficulty of conservation. Therefore, this study aimed to characterize the non-structural carbohydrate content in different floral stages of G. jamesonii var. Dawn and evaluate the effect of preservative solutions during the postharvest storage of this species. For this purpose, it was quantified TSS, RS and NRS from the seven stages of gerbera stems ontogeny (E1, E2, E3, E4, E5, E6 and E7). The preservative solutions used were: T1) distilled water; T2) citric acid (100 mg L-1); T3) glucose (20 g L-1); T4) gibberellic acid (GA3 , 5 mg L-1); T5) calcium chloride (CaCl2 , 20g L-1) and T6) Sodium Thiosulphate (STS, 20 mM). The effect of preservative solutions were assessed daily, considering the longevity of flowers, variation in the absorption of preservative solution, pH of the solution and fresh mass variation. The experimental design was completely randomized with four replicates. There was a difference in carbohydrate metabolism during floral opening and senescence. In the orange bracts there was a lower TSS content, while in the inflorescences it was observed a reduction in the yellowish, greenish-green and greenish stages. The content of RS increased in the bracts, whereas in the inflorescence there was no difference. The NRS content was higher in the orange bracts, showing lower rates in the inflorescences in yellowish and yellowish greenish stages. The preservative solutions had an impact, on the floral stem longevity, varying according to the solutions used, i.e. CaCl2 and STS reduced the durability of gerbera flower in 9.25 and 11.5 days, respectively, compared to stems kept in distilled water. The glucose solution did not promote a significant difference compared to water. Therefore, we conclude that there is variation in the metabolism of non-structural carbohydrates during the floral development of G. jamesonii var. Dawn and the tested solutions were not effective in promoting postharvest conservation of gerbera.
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Kiige, John Kamanthi, Patrick Wachira Mathenge, and Agnes Mumo Kavoo. "Biorational Preservation of Rose (Rosa hybrida L.) Cut-Flower Using Stevia (Stevia rebaudiana B.) and Thyme (Thymus vulgaris L.) Extracts." Journal of Horticulture and Plant Research 4 (November 2018): 1–10. http://dx.doi.org/10.18052/www.scipress.com/jhpr.4.1.
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Rose cut flower is one of the widely grown cut flowers in Kenya. However, most roses have a challenge of short vase life. This study aimed at determining the efficacy of plant extracts from thyme and stevia in preservation of rose cut-flowers. Two rose cut-flower cultivars; ‘radiance and ‘high & sparkling’ were subjected to stevia and thyme extracts each at three levels (0.2, 0.4, and 0.6gL-1). Thyme extracts at a concentration of 0.2 gL-1 significantly (p≤001) extended the vase life of rose cut flower by 3.5 days and floral absorption rates by 10.4% compared to the commercial preservative (chrysal) at the same concentration rates. Application of higher doses (0.4gL-1 and 0.6gL-1) of plant extracts led to shorter vase life (6 days) of rose cut flower and maximum bent neck records at day 8. The response of rose cut flower to the treatments did not vary between cultivars. The results from this study indicate that thyme extracts offer an attractive alternative to the use of chemical floral preservatives for prolonging the vase life and enhancing quality of rose cut flower. The efficacy of extracts is however depended on the concentration level with 0.2gL-1 dosage recording the best results.
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Bastos, Fernanda Espíndola Assumpção, Mayara Cristiana Stanger, Ricardo Allebrandt, Cristiano André Steffens, Aike Anneliese Kretzschmar, and Leo Rufato. "Conservação de rosas ‘carola’ utilizando substâncias com potencial biocida." Ornamental Horticulture 22, no. 1 (May 5, 2016): 107. http://dx.doi.org/10.14295/oh.v22i1.806.
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Two experiments were conducted to evaluate the effect of different preservative solutions on maintaining postharvest quality of red roses cultivar ‘Carola’. The treatments evaluated in both experiments were five preservative solutions: (S) sucrose (1%) (SAC) sucrose (1%) + citric acid (0.2 g L-1), (SACH) sucrose (1 %) + citric acid (0.2 g L-1) + sodium hypochlorite (1%) (SACA) sucrose (1%) + citric acid (0.2 g L-1) + rosemary oil (Rosmarinus officinalis L.) (100 uL L-1), (SACG) sucrose (1%) + citric acid (0.2 g L-1) + Oil Ginger (Zingiber officinale) (100 uL L-1). In the first experiment the rods were maintained for 10 days in refrigerator at 3 ± 1 °C and in the second experiment were maintained for five days in refrigerator (3 ± 1 °C) and five days at ambient conditions (19 ± 1 °C) . The variables evaluated were swelling, curvature of the floral stalk, browning petals, floral opening and colored petals, in both experiments, and coloring of the petals in the second experiment. The evaluations were performed every two days during the storage period in experiment 1, and daily during the shelf period in experiment 2. The experimental design in both experiments was a randomized complete block design with four replications and two branches each. In the first experiment, the use of sucrose was shown to be as effective as the other preservative solutions, preserving the roses up to 10 days in cold storage at 3 ± 1° C. In the second experiment, for the solution containing sucrose alone, the use of sodium hypochlorite, rosemary oil, and ginger oil showed the best results in maintaining the quality of the rods, and essential oils gave better preservation of roses.
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Mehraj, H., I. H. Shiam, T, Taufique, M. Shamsuzzoha, and A. F. M. Jamal Uddin. "Effects of floral preservative solutions for vase life evaluation of Gerbera." Journal of Bioscience and Agriculture Research 9, no. 2 (2016): 804–11. http://dx.doi.org/10.18801/jbar.090216.97.
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Sales, Thais Silva, Patrícia Duarte Oliveira Paiva, Heloísa Helena de Siqueira, Guilherme Mariano Manfredini, and Luiz Carlos de Oliveira Lima. "Preservative solutions on quality and biochemical aspects of calla lily flowers." Ciência e Agrotecnologia 42, no. 2 (March 2018): 176–85. http://dx.doi.org/10.1590/1413-70542018422020717.
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ABSTRACT The knowledge of physiological and biochemical aspects occurring at the postharvest phase of flowers is critical to guide efficient conservation techniques for maintaining quality and longevity. Factors that cause deterioration of cut flowers after harvest are dehydration, low carbohydrate contents, the presence of microorganisms in vase solution or stem and late stage of development at harvest. Thus, the objective was to determine the effect of harvest stages of calla lily stems and storage solutions on water relations and contents of starch and sugars. Flower stems were harvested in the following opening stages of the spathe: early-stage (cartridge) and 1/3 open and were arranged in six storage solutions containing 1, 2, 4 and 6% glucose and the controls with water and solution with 5% sucrose. Results indicate that at early-stage and 1/3 open harvesting stages, the addition of glucose at concentrations of 4% and 6% stimulated flower opening. Calla lily flower stems maintained in water and in solution with 1% glucose had lower percentages of fresh weight loss and better maintenance of water balance, with a small reduction in the contents of starch and soluble sugars. The addition of sugars in the storage solution was efficient in opening early-harvested stems. Harvest the floral stems in initial stages allow the maintenance of the commercial quality for longer period, without pollen production. The use of water relations allowed the determination of the better sugar concentration for the conservation of open-harvest of floral stems.
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Favetta, Vanessa, Ronan Carlos Colombo, and Ricardo Tadeu de Faria. "Longevidade de hastes florais de Oncidium baueri mantidas em soluções conservantes." Comunicata Scientiae 7, no. 2 (November 4, 2016): 209. http://dx.doi.org/10.14295/cs.v7i2.857.
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Orchids have been gaining prominence in the cut flower market due to the exoticism and the singular beauty of its flowers. However, techniques which help to keep the floral quality are needed, since the commercial success is tied to the flowers longevity after cut. Thus, the aim of this study was to evaluate preservative solutions on postharvest longevity of Oncidium baueri floral stems. Floral stems, with 60 cm of length and 90% of open flowers were submitted to pretreatment in a pulsing solution, sucrose-based, for 12 and 24 hours, and placed in maintenance solutions containing sucrose and/or Flower®; keeping the control treatment, with distilled water only. These solutions were added with 0.5% of sodium hypochlorite. The evaluation to verify the quality of the flowers was performed daily using a criterion of notes, ranging from 4 to 0. From third day of evaluation, the floral stems submitted to pretreatment with pulsing solution presented statistically lower averages and at the fourth day of evaluation were considered inadequate for marketing. Increased longevity and quality of the flowers can be obtained by keeping the floral stems in distilled water or in maintenance solutions, which are 1% sucrose-based.
Dissertations / Theses on the topic "Floral preservative"
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Jenkins, Morgan. "Increased knowledge about floral preservatives influences customers’ perception of the quality and value of a floral arrangement purchase." Kansas State University, 2010. http://hdl.handle.net/2097/6986.
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Master of ScienceDepartment of Horticulture, Forestry, and Recreation Resources
Kimberly A. Williams
Despite extensive evidence that appropriate use of floral preservatives extends postharvest longevity of most fresh flowers, their use by traditional full-service florists has been observed to be highly variable. This research was developed to determine if knowledge about floral preservatives increases consumers’ perception of quality, purchase intention, and price of a floral arrangement. A survey was administered to 222 participants at two locations in Manhattan, Kansas during April 2010. Seventy-three percent of respondents fell within the age range of Gen Y. The survey instrument contained four levels of presentation of a floral arrangement that were associated with increasing knowledge about the use of a floral preservative on consumers’ perceptions about the quality and price of that arrangement. Results were analyzed via within-subjects ANOVA, Bonferroni post-hoc tests, t-tests, and regression analyses. Participants of the survey rated the quality of a floral arrangement higher from Level 2 (presence of floral preservative not explicit) to 3 (presence of floral preservative explicit) and Level 3 to 4 (after reading 191 word count message about floral preservative function and effectiveness). Their intent to purchase the floral arrangement generally increased with each level of presentation. Participants increased the price that they were willing to pay for the floral arrangement at each level of presentation, starting at $25.49 at Level 1 (no floral preservative use indicated) to $29.17 at Level 4. Participants were more knowledgeable about the benefits of floral preservatives and believed that floral preservatives increased the value of floral arrangements after reading a message describing their function and effectiveness more so than before reading the message. Younger participants were more willing to pay more for floral arrangements with floral preservatives than older participants. As consumers become more aware of the use of floral preservatives and more knowledgeable about how and why they are effective, they attribute higher quality to floral arrangements with preservatives, are willing to pay more for arrangements with preservatives, and their purchase intention frequency increases. Florists should consider providing a message about the function and effectiveness of floral preservatives to their customers, and then market their use of these materials.
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Rebelo, Anthony G. "The preservation of the Cape flora : status, causes of rarity, ideals and priorities." Doctoral thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/14229.
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Includes bibliographies.The Cape Floristic Region (CFR), covering 90 000 km2, comprises one of the world's six floral kingdoms. With 8600 species, of which 68 per cent are endemic, it ranks amongst the richest of temperate and tropical floras. Although 19 per cent of the CFR occurs in nature reserves, by far the majority of the preserved area comprises Mountain Fynbos. Only 0.5 and 3 per cent of the original extent of Renoster Shrub/and Lowland Fynbos is preserved, respectively. In this study Fynbos vegetation is identified as the richest habitat for Red Data Book (RDB) plant, freshwater fish, amphibian, butterfly, and reptile species in southern Africa. The greater Cape Town metropolitan area is identified as containing by far the highest richness of RDB plant, butterfly, reptile and amphibian species in the CFR Thus, this area ranks globally as one of the most urgent conservation priorities. The study also illustrates that previously used methods for evaluating priority conservation areas have under-rated species-poor areas containing a high proportion of RDB species. By collecting for species richness, a far more realistic picture of threatened areas can be obtained from RDB taxa. This study predicts, using a priori hypotheses based on ecological traits, and finds, that seed dispersal and regeneration strategies are most strongly correlated with rarity, most specifically with distributional area. Using distributional data for the Proteaceae, this study estimates that 95 per cent of all vascular plant species in Fynbos can be preserved in 16 per cent of the area. It also identifies the sites that require preservation if the maximum protection of floral diversity is to be realized. Two null models for evaluating the efficiency of a spatial configuration of reserves are proposed. Utilizing an iterating selection procedure, this study explores various algorithms, based on species richness and rarity, to construct ideal reserve configurations. This study provides the first empirical confirmation that the ideal approach to designing a reserve configuration is to identify areas of high endemism and richness in distinctive vegetation types within particular biogeographical regions. Thus, this study pioneers the use of RDB data to identify priority conservation regions, provides one of the first assessments of the causes of rarity in plants and establishes useful null models and algorithms for the identification and testing of ideal reserve locations in the design of integrated reserve networks. Not only does this study contribute towards theoretical reserve selection procedures, but it provides one of the most advanced frameworks for the preservation of a top conservation priority in the world, the CFR.
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Doreto, Hanay dos Santos. "Forrageamento estacional da Apis mellifera L., 1758 (Hymenoptera : Apidae) e identificação da florada apícola de importância nectífera e polinífera em Jaboticabal, São Paulo, Brasil /." Jaboticabal, 2019. http://hdl.handle.net/11449/190977.
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Orientador: Eduardo Custódio GasparinoResumo: As abelhas Apis mellifera L. (1758) são consideradas os principais polinizadores das plantas com flores e também uma das espécies mais produtoras de mel. Devido o amplo número de espécies vegetais que utilizam para a obtenção de alimento e matéria-prima, a identificação botânica do mel é fundamental para a classificação da florada em monofloral ou silvestre. Para isso, a técnica da melissopalinologia utiliza da análise das características morfológicas externas dos grãos de pólen presentes no mel. O presente estudo objetivou analisar o comportamento estacional de forrageamento de colmeias de Apis mellifera por meio da identificação dos tipos polínicos nectíferos e poliníferos presentes no mel. As coletas do mel foram realizadas entre outubro de 2017 a agosto de 2018 nas estações primavera, verão, outono e inverno no Setor de Apicultura da Faculdade de Ciências Agrárias e Veterinárias, FCAV/UNESP Campus de Jaboticabal, São Paulo, Brasil onde três colmeias de abelhas Apis mellifera estavam instaladas. Para a extração dos grãos de pólen e montagem das lâminas a metodologia clássica da melissopalinologia e a técnica clássica de acetólise foram empregadas. Ao todo, foram encontrados 42 tipos polínicos, distribuídos em 24 famílias botânicas. Alguns tipos foram observados em todas as estações: Alternanthera (Amaranthaceae), Cecropia (Urticaceae), Mimosa (Fabaceae) e Myrtaceae (Myrtaceae), mas também houve a ocorrência de tipos exclusivos das estações: Aloe, Bignoniaceae, Byrsonima, D... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Apis mellifera L. (1758) bees are considered the main pollinators of flowering plants and also one of the most honey-producing species. Because of the large number of plant species they use to obtain food and raw materials, the botanical identification of honey is fundamental for the classification of flowering as monofloral or wild. For this, the melissopalynology technique uses the analysis of the external morphological characteristics of pollen grains present in honey. The present study aimed to analyze the seasonal foraging behavior of Apis mellifera hives by identifying the nectiferous and polyniferous pollen types present in honey. Honey was collected between October 2017 and August 2018 in the spring, summer, autumn and winter seasons at the Setor de Apicultura da Faculdade de Ciências Agrárias e Veterinárias, FCAV/UNESP Campus de Jaboticabal, São Paulo, Brazil where three hives of Apis mellifera bees were installed. For the extraction of pollen grains and slide assembly the classical melissopalynology methodology and the classical acetolysis technique were employed. In all, 42 pollen types were found, distributed in 24 botanical families. Some types were observed in all seasons: Alternanthera (Amaranthaceae), Cecropia (Urticaceae), Mimosa (Fabaceae) and Myrtaceae (Myrtaceae), but there were also unique types of seasons: Aloe, Bignoniaceae, Byrsonima, Daustinia, Eucalyptus, Euphorbiaceae, Machaerium, Mangifera, Pseudobombax, Sapindus, Solanum and Tabebuia in spring; An... (Complete abstract click electronic access below)
Mestre
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Belbahi, Amine. "Étude et modélisation d'un traitement thermique suivi d'un conditionnement (température, aw et CO2) pour la maîtrise de la flore fongique d’altération des dattes à humidité intermédiaire." Thesis, Montpellier, SupAgro, 2015. http://www.theses.fr/2015NSAM0032.
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La datte Deglet-Nour est traditionnellement récoltée et consommée au stade de maturité complet Tamar caractérisée par une faible activité en eau (aw< 0,76). Cette datte est stable dans des conditions ambiantes. En revanche, à un stade de maturité précoce (Routab), la Deglet-Nour est intéressante sur le plan organoleptique, mais susceptible de développement microbien en raison de son activité en eau intermédiaire (aw = 0,80−0,85). Ce travail s'est intéressé à d'une part, réduire la charge microbienne initiale des dattes par une opération de traitement thermique de surface post-récolte, puis d'autre part, à prolonger la durée de vie des dattes en inhibant le développement fongique par l'effet (seul ou combiné) de trois facteurs environnementaux que sont la température, l'aw et l'atmosphère enrichie en CO2 (emballage sous atmosphère modifiée). Les souches fongiques présentent à la surface des dattes ont été isolées et identifiées sur des dattes collectées dans trois régions du sud algérien ; il s'agit d'Aspergillus niger, d'Alternaria alternata et de Candida apicola. La charge fongique varie entre 2,4 et 5,8 10^2 UFC/g et est localisée uniquement à la surface des dattes. Un modèle d'inactivation thermique des souches a été développé. La thermosensibilité des souches a été évaluée avec un D_50 de 2,3 ± 0,4 min et 22,1 ± 2,1 min, pour C. apicola et Asp. niger respectivement. Les valeurs de sont 9,4 ± 2,6°C et 9,6 ± 0,1°C, pour C. apicola et Asp. niger, respectivement. Ce modèle cinétique a été validé en condition de traitement thermique instationnaire. Un modèle numérique de transfert d'énergie en 2D axisymétrique a été conçu et résolu par la méthode des éléments finis. Il prend notamment en compte, les diverses parties d'une datte (pulpe, lame d'air, noyau) et permet d'estimer la réduction de charge des levures et l'impact sur la qualité. Ces informations ont permis de rationaliser les barèmes de pasteurisation en surface des dattes tout en limitant le brunissement non-enzymatique. Les effets de la température (10−40°C), de l'aw (0,993−0,818) et de la concentration en CO2 (9,4−55,1%, v/v) sur les vitesses de croissance des deux souches ont été quantifiées et modélisées par un modèle primaire linéaire à deux phases et le modèle secondaire du γ-concept. Il inclue les interactions entre l'aw et le CO2. Les limites de croissance/non-croissance ont été prédites par une approche déterministe, et l'évaluation de la performance du modèle a été menée sur une pâte de datte. Asp. niger manifeste une plus grande vitesse de croissance et tolérance aux faible aw que Alt. alternata, tandis que Alt. alternata est plus tolérantes aux fortes concentrations en CO2 et aux basses températures (respectivement pour Asp. niger et Alt. alternata : µ_opt = 28,6 et 12,1 mm jour^–1 ; aw_min= 0,786 et 0,808 ; CO2_max= 79,8 et 95,1% ; T_min = 4,4°C et 1,6°C). Le modèle γ-concept surestime les vitesses de croissance sur la pâte de datte, en revanche le modèle reste optimiste avec des prédictions conservatrices. Cette étude a mis en évidence l'intérêt d'un traitement thermique pour pasteuriser la surface des dattes tout en limitant le brunissement non-enzymatique ; de plus l'effet inhibiteur CO2 sur la croissance des deux moisissures est très efficace et un conditionnement enrichi en CO2 semble pertinent pour la conservation de ces dattes immaturesThe Deglet-Nour date is traditionally harvested and consumed at full ripeness stage (Tamar) characterized by a reduced water activity (aw<0.76). This date is stable under ambient storage conditions. In contrast, unripe Deglet-Nour (Routab stage) has interesting organoleptic properties, but is prone to microbial contamination due to its intermediate water activity levels (aw = 0.80−0.85). On the one hand, this work focused on the reduction of the initial microbial load by post-harvest surface heat treatment operation and, on the other hand, extending the shelf life of the dates by the inhibition of fungal growth using three environmental factors: temperature, aw and CO2-enriched atmosphere (modified atmosphere packaging). The fungal strains initially present on the Deglet-Nour dates surface were isolated from three districts in Algeria (Biskra, Tolga and Doucen). These strains were identified at the molecular level as Aspergillus niger, Alternaria alternata and Candida apicola. The fungal load ranged from 2.4 to 5.8 10^2 CFU/g. A thermal inactivation model for these strains was developed. Decimal reduction times at 50°C (D_50) were 22,1 ± 2,1 min and 2.3 ± 0.4 min for A. niger and C. apicola, respectively. The z-values were 9.6 ± 0.1°C and 9.4 ± 2.6°C for A. niger and C. apicola, respectively. This kinetic model was validated in unsteady heat treatment conditions. In parallel, a 2D axial-symmetric model of heat transfer was designed and solved by the finite element method. It takes into account the various sub-domains of date (pulp, air layer and pit) and assesses the yeast inactivation rate and the impact on quality. These data allowed for streamlining pasteurization schedules on dates surface. The effect of temperature (10−40°C), aw (0.993−0.818) and CO2 concentrations (9.4-55.1%, V/V) on the growth rates of Asp. niger and Alt. alternata have been quantified and modeled using the two-phase linear model and the γ-concept. The boundary between growth/no-growth was predicted using a deterministic approach and the model performance evaluation was conducted on pasteurized date past. A significant effect of the environmental factors on the growth of both strains has been found. Asp. niger displayed a faster growth rate and higher tolerance to low aw than Alt. alternata, which in turn proved more resistant to CO2 concentration and low temperature (respectively for Asp. niger and Alt. alternata: µ_opt = 28.6 and 12.1 mm day^–1; aw_min= 0.786 and 0.808; CO2_max= 79.8 and 95.1% ; T_min = 4.4°C and 1.6°C). The γ-concept model overestimated growth rates on date past; however, it is optimistic and provides somewhat conservative predictions. This study highlights the benefit of heat treatment to pasteurize dates surface while minimizing the color date degradation. In addition, the inhibitory effect of CO2 on the growth of both molds is very efficient, and CO2-enriched atmosphere seems relevant for the preservation of unripe dates
Books on the topic "Floral preservative"
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Huber, Margaret D. How to preserve your bridal bouquet: Techniques for creating floral keepsakes. Houston, Tex: Everlasting Words and Flowers, 1994.
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Ditch hunting, for year-round recreation, decoration inspiration, and profit: A guide to gathering, crafting, and selling found natural materials and plants. Central City, IA: Calathus, 1998.
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Skeleton leaves and phantom flowers: A treatise on the art of producing skeleton leaves. Almonte, Ont: Algrove Pub., 2003.
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C, Ek Renske, and Ek Renske C, eds. Flora of the Guianas: Supplementary series. Koenigstein, Federal Republic of Germany: Koeltz Scientific Books, 1990.
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Taylor, Bryan J., and C. Ritchie Bell. Florida Wild Flowers and Roadside Plants. The University of North Carolina Press, 2006.
Find full textBook chapters on the topic "Floral preservative"
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Muthireddy, Vamsidhar, and C. V. Jawahar. "Computer Vision for Capturing Flora." In Digital Techniques for Heritage Presentation and Preservation, 245–72. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57907-4_12.
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Oyelese, Olusegun A. "Hypoxanthine Levels, Chemical Studies and Bacterial Flora of Alternate Frozen/Thawed Market-Simulated Marine Fish Species." In Progress in Food Preservation, 315–29. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781119962045.ch15.
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Škaloud, Pavel, Fabio Rindi, Christian Boedeker, and Frederik Leliaert. "Collection, preservation and culturing." In Freshwater Flora of Central Europe, Vol 13: Chlorophyta: Ulvophyceae (Süßwasserflora von Mitteleuropa, Bd. 13: Chlorophyta: Ulvophyceae), 25–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-55495-1_7.
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McCartney, Matthew. "Water Quantity and Hydrology." In Freshwater Ecology and Conservation, 67–88. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198766384.003.0004.
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Freshwater ecosystems are naturally dynamic. The source of water, discharge, turnover, and residence times all affect which organisms can live in different freshwater habitats and are key determinants of freshwater ecosystem structure and function. Human-induced changes to the volume and timing of both surface and ground water flows are a leading driver of global declines in freshwater biodiversity and are likely to be exacerbated by climate change. The conservation of many wetlands around the world, including in some cases the preservation of unique flora and fauna, is now entirely dependent on continued human intervention and water management. Such management can only be successful if based on sound understanding of water budgets and hydrological processes informed by accurate hydrological monitoring. This chapter provides a brief introduction to hydrological monitoring—what needs to be measured and how—for freshwater ecology and conservation.
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Daniela Manzano Guzmán, Sandra, Jose Augusto Drummond, and Cristiane Gomes Barreto. "Undesirable Neighbours: Eucalyptus and Protected Areas." In Protected Area Management - Recent Advances [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99831.
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Eucalyptus is the common name of a set of exotic species present in the Brazilian territory. They have a strong invasive potential which is detrimental to the preservation of native floral formations, particularly in protected areas. This research seeks to (i) understand the stage of eucalyptus invasion in the Brasilia National Park; (ii) identify the main vectors of the invasive populations and (iii) verify the possible role of the adjoining Brasília National Forest in the invasion and (iv) consider possible conflicts between the roles of these two different categories of protected areas. A set of phytosociological sample areas were defined inside the park to pinpoint different eucalyptus populations. Findings indicate that eucalyptus populations inside the park behave invasively, having advanced 186.30 meters from their point of origin over the span of 45 years. Among the possible contamination vectors are a neighbouring nursery run by the local government and eucalyptus plantations in the adjoining Brasília National Forest. Results indicate the need for management actions to avoid continual seed dispersal by examined populations. They also indicate that the distinct conservation goals of national forests and national parks must be considered, especially when they are neighbours.
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Hoen, Bruno, and Xavier Duval. "Antibiotic prophylaxis and prevention of infective endocarditis." In ESC CardioMed, edited by Gilbert Habib, 1736–38. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0399.
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Prevention of infective endocarditis has historically focused on oral health because oral streptococci are part of oral flora and once caused most cases of native valve infective endocarditis. Because no randomized clinical trial has ever been conducted to confirm the efficacy and safety of antibiotic prophylaxis of infective endocarditis, it is likely that the debate on indications for antibiotic prophylaxis of infective endocarditis will continue in the coming years. In the meantime, it is reasonable to propose antibiotic prophylaxis to patients at high risk of infective endocarditis before they undergo high-risk dental procedures. Prevention of healthcare-associated infective endocarditis should also be targeted through prevention of healthcare-acquired bacteraemia, and antibiotic prophylaxis before the implantation of cardiac implantable electronic devices. Other prevention options include preservation of good oral hygiene. In the future, prevention of Staphylococcus aureus endocarditis might rely on vaccines, with candidate S. aureus vaccines currently being evaluated in humans.
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Singh, Lakhvinder. "Ecotourism as a Tool for Sustainable Development in Morni Hills (Haryana), India." In Handbook of Research on the Role of Tourism in Achieving Sustainable Development Goals, 102–16. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5691-7.ch006.
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Ecotourism is an emerging approach to attain sustainable development. The Morn Hills region of Haryana in India is emerging as a famous ecotourism destination, as it is endowed with rich and varied vegetation, flora and fauna, and forest area. The chapter empirically investigates the local community attitude towards ecotourism as a mean for sustainable development. The chapter used 200 data responses conveniently collected from respondents through a survey form and used suitable statistical tools to analyse the result. The study indicates huge prospects of ecotourism in the area and variation in the attitude of the local community towards the role of ecotourism in sustainable development. A highly positive attitude of locals as ecotourism brings sustainable and overall development in the area in the form of enhanced economic benefits, enrichment of socio-cultural values, increased concerns, and preservation of environmental and physical resources. The chapter concludes different stakeholders to come up with appropriate strategies for sustainable development of the area.
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Graham, Alan. "Middle Eocene through Early Miocene North American Vegetational History: 50-16.3 Ma." In Late Cretaceous and Cenozoic History of North American Vegetation (North of Mexico). Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195113426.003.0009.
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During the Middle Eocene through the Early Miocene, erosion of the Appalachian Mountains exceeded uplift and there was a net reduction in elevation. In the Rocky Mountains uplift continued through the Middle Eocene (end of the Laramide orogeny), waned in the Middle Tertiary, and then increased beginning at about 10 Ma. Earlier reconstructions placed paleoelevations in the Rocky Mountains during the Middle Eocene through the Early Miocene at approximately half the present relief. The maximum elevation in the Front Ranges during the latest Eocene was estimated at ~2500 m (~8000 ft; MacGinitie, 1953). Recent approximations are for nearly modern elevations in several areas by the Eocene-Oligocene. Extensive Eocene volcanism deposited ash and blocked drainage systems, augmenting uplift and facilitating the preservation of extensive fossil floras and faunas. In the far west the beginning of Tertiary volcanism in the Sierra Nevada is dated at ~ 33 Ma near the Eocene-Oligocene boundary. A drying trend becomes evident in the Middle Eocene and reduced moisture, along with the waning of volcanic activity in the Oligocene, restricted conditions favorable to fossilization. The number of Oligocene floras in the northern Rocky Mountains is considerably fewer than in younger deposits to the west. In the absence of extensive plate reorganization and orogeny, CO2 concentration decreased, which contributed to a temperature decline that continued through the Cenozoic and intensified in the Late Tertiary. Recall from Chapter 2 (sections on orogeny and volcanism) that uplift plays a role in determining long-term climate by creating rainshadows, altering atmospheric circulation patterns, and increasing the erosion of silicate rocks that causes a drawdown of CO2. This allows heat to escape from the troposphere and results in lower temperatures. Marine benthic temperatures were ~10°C in the early Late Eocene and ~2°C near the Eocene-Oligocene boundary, assuming an essentially ice-free Earth during that time, and increased to ~5-6°Cnear the end of the Early Miocene. Temperatures over land in the midnorthern latitudes are estimated to have dropped by ~12°C between the Late Eocene and Early Oligocene (Wolfe, 1992a).
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Lorbiecki, Marybeth. "The Round River of Ecological Economics and Development." In A Fierce Green Fire. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199965038.003.0027.
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Richard Taber, one of Aldo’s students, understood the round river aspect of the Professor’s credo—where the flow of energy moves through human systems of economics, as well as through natural ones. “He was seeing beyond the preservation of nature apart—toward the integration of human and natural worlds.” Nowhere is this movement more evident than in United Nations discussions with scientists, ecologists, development specialists, economists, and cultural preservation specialists on how to craft and fulfill Sustainable Development Goals for 2015+. Worldwide, it has become very clear that poverty increases with environmental destruction, and public health drastically decreases. Though Leopold did not live to address the United Nations when asked in the 1940s, he was advocating for economic systems that were far more cognizant of the connections between the environment and the personal, cultural, and systematic levels of economies. In his 1933 essay “Conservation Economics,” Leopold vented his frustration with the concept that the marketplace, or just legislation, could be relied on to protect resources. A far deeper understanding of the connections between natural resources and human economies was needed to see that if individual landowners and businesses didn’t care for these elements, they would end up paying for them anyway: . . .The wholescale public expenditures for 1933 indicate that from now on, whenever a private landowner so uses his land as to injure the public interest, the public will eventually pay the bill, either by buying him out, or by donating the repairs or both. Hence the prevention of damage to the soil, or to the living things upon it, has become a first principle of public finance. Abuse is no longer merely a question of depleting a capital asset, but of actually creating a cash liability against the taxpayer. . . . Leopold advocated for a new economic order based on additional criteria beyond monetary balance sheets: “Now to appraise the new order in terms of the two criteria: 1) Does it maintain fertility? 2) Does it maintain a diver fauna and flora?” Natural beauty, stability, and sustainability are qualities people assume as part of quality of life, but they don’t plan for them.
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Roberts, Patrick. "Tropical Bounties The Emergence of Tropical Forest Agricultures." In Tropical Forests in Prehistory, History, and Modernity. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198818496.003.0009.
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The transition from the Terminal Pleistocene to the Holocene (c. 12–8 ka) witnessed increasingly intensive human manipulation of plant and animal resources that resulted in genetic and phenotypic changes in various species as part of what has been termed the ‘origins of agriculture’. This process has been cited as one of the most significant ecological occurrences in human evolutionary history (Bocquet-Appel, 2011; Larson et al., 2014), representing a shift in human interactions with the natural world with global environmental ramifications (Fuller et al., 2011a; Boivin et al., 2016). Martin Jones (2007) has also discussed the cultural and social changes resulting from the new spatial and practical proximity of domesticated plants and animals that made them effectively ‘family’ or ‘kin’. The tropics have, for a long time, been left out of discussions of this process, with poor preservation conditions considered unlikely to produce incipient crop or animal domesticate remains and some even arguing that the wet and acidic soils of tropical forests were too poor to support agriculture (Meggers, 1971, 1977, 1987; Grollemund et al., 2015). Nevertheless, emerging datasets from Melanesia, North and Central America, South America, and Africa are demonstrating that cultivation and, to a lesser extent, herding practices also emerged indigenously in these regions and, in some cases, perhaps as early as the traditional focus point of the ‘Fertile Crescent’ in the Near East. Moreover, these examples are having significant impacts on the way we conceptualize the emergence of ‘agriculture’ and the adaptive and social changes required (Denham et al., 2004, 2009; Barton and Denham, 2011). Here, I explore the distinctive nature of early agricultures in tropical forest environments. I also evaluate their predecessors in the form of human management including forest burning to stimulate faunal and floral growth and diversity, the deliberate movement of faunal species into tropical forest environments, and the emergence of arboriculture cultivation. In doing so, I document how the species and strategies involved in these processes differ globally with varying tropical forest formations, ranging from a focus on long-term forest interaction, drainage system construction, and tree-cropping in Melanesia (Denham et al., 2003; Denham, 2011) to diverse hunting, fishing, and cultivation strategies in theAmazon (Roosevelt, 2000; Meggers and Miller, 2002).
Conference papers on the topic "Floral preservative"
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Krylenko, Sergey, and Sergey Krylenko. "CHARACTERISTICS OF THE CLIFF PLANT COMMUNITIES OF THE TUAPKHAT MASSIF." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4316e19929.
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Preservation of biological diversity is necessary for sustainable development and rational use of coastal resources. In this paper structure of the cliff plant communities of the massif Tuapkhat (the Black Sea coast, Russia) are characterized. Flora of this coastal zone combines features of Mediterranean and middle European Russia types. Herbaceous and shrub life-forms and xeromorphous and petrophilous plant associations dominate at the studied area. The main factor determining the species composition of the examined communities is substrate character.
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Krylenko, Sergey, and Sergey Krylenko. "CHARACTERISTICS OF THE CLIFF PLANT COMMUNITIES OF THE TUAPKHAT MASSIF." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b947c2491c5.29725059.
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Preservation of biological diversity is necessary for sustainable development and rational use of coastal resources. In this paper structure of the cliff plant communities of the massif Tuapkhat (the Black Sea coast, Russia) are characterized. Flora of this coastal zone combines features of Mediterranean and middle European Russia types. Herbaceous and shrub life-forms and xeromorphous and petrophilous plant associations dominate at the studied area. The main factor determining the species composition of the examined communities is substrate character.
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Liogchii, Nina, Adam Begu, and Regina Fasola. "Conservarea resurselor naturale în rezervatiile peisajere." In Impactul antropic asupra calitatii mediului. Institute of Ecology and Geography, Republic of Moldova, 2019. http://dx.doi.org/10.53380/9789975330800.15.
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In the paper are presented the results of the researches in the Landscape Reservations from Calarasi district. The study is based on field and laboratory research. The valuable natural components of the reserves are highlighted. As a result of the researches it was found that each of the evaluated areas has its role in the protection of certain valuable components. Being designed to conserve the geographical landscapes, the reservations are extremely valuable for preserving the natural habitats and ensuring the protection and conservation specific to the Codry area flora and fauna thus contributing to the preservation of natural resources and maintenance of ecological balance in the Region.
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Бабиков, Владимир Александрович, and Кристина Алексеевна Тимофеева. "MEDICINAL PLANTS OF THE BICHURA DISTRICT AND THEIR USE IN TIBETAN MEDICINE." In Поколение будущего: сборник избранных статей Международной студенческой научной конференции (Санкт-Петербург, Май 2021). Crossref, 2021. http://dx.doi.org/10.37539/pb191.2021.55.50.002.
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В представленной статье рассматриваются особенности экологии лекарственных растений, произрастающих на территории Бичурского района Бурятии, и их применение в традиционной тибетской медицине. На основе собранных сведений назрела необходимость подробного изучения фармакологических свойств изучаемых растений, с учетом мер по охране и сохранению их в флоре Бичурского района. The article deals with the peculiarities of the ecology of medicinal plants growing on the territory of the Bichursky district of Buryatia, and their application in traditional Tibetan medicine. Based on the collected information, there is a need for a detailed study of the pharmacological properties of the studied plants, taking into account measures for the protection and preservation of them in the flora of the Bichursky district.
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Yuliantari, Ans. "Manggarai Folklore: Challenges of Transmission and Preservation in the Digital Era." In Proceedings of the 1st International Conference on Education, Humanities, Health and Agriculture, ICEHHA 2021, 3-4 June 2021, Ruteng, Flores, Indonesia. EAI, 2021. http://dx.doi.org/10.4108/eai.3-6-2021.2310741.
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Georgiev, Georgi. "BIOLOGICAL DIVERSITY OF WETLANDS AND RAMSAR PLACES IN THE CROSS-BORDER REGION OF BULGARIA, NORTHERN MACEDONIA, ALBANIA AND GREECE AND DEVELOPMENT." In TOURISM AND CONNECTIVITY 2020. University publishing house "Science and Economics", University of Economics - Varna, 2020. http://dx.doi.org/10.36997/tc2020.97.
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According to the definition of the International Union for Conservation of Nature and Natural Resources (IUCN), wetlands on Earth are areas that are flooded or saturated with water, artificial or natural, permanently or temporarily flooded with standing, sitting or running water. These areas include areas where water is the predominant element, such as swamps, wetlands, peatlands, estuaries, sea branches and lagoons, lakes, rivers and artificial reservoirs with a depth of more than six meters. Considering the importance of these territories and with the deep conviction that the preservation of their flora and fauna can be ensured by combining long-term national policy with coordinated international action, the scientific community reacted to the encroachments and unreasonable attitude to them by concluding 02.02. 1971 of the Convention on wetlands of international importance, especially as waterfowl habitats, known to the general public as the Ramsar Convention. The main objectives of this document are to manage wetlands as sites of great economic, cultural, scientific and conservation value, to avoid damage and loss and to preserve them through prudent use, i.e. through their continuous development. The object of study in the present work is the biological diversity, in particular the avifauna of some of the internationally important wetlands in the border areas between Bulgaria, Greece, the Republic of North Macedonia and Albania in view of the opportunities they offer for the development of some forms of alternative types of tourism.