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Infrared Radiation Drying of Mint Leaves  [PDF]
B. S. Demirturk,H. Kocabiyik,B. S. Demirturk
Journal of Tekirdag Agricultural Faculty , 2008,
Abstract: The effects of air velocity on the drying characteristics, drying time and drying rate of mint leaves were investigated at infrared drying. Specific energy consumption and color properties of dried mint leaves were examined. Experiments were conducted using four levels of air velocity (0.5, 1.0, 1.5 and 2.0 m/s) at 1080 W/m2 of infrared radiation density. The drying time ranged from 64 to 180 minutes for all the drying conditions. The drying rate increased with decreasing of air velocity. The specific energy consumption values varied between 37.04 and 106.58 MJ/kg-evaporated water for all the drying conditions. Colour parameters were found to be affected by process variables.
Protection against LPS-induced cartilage inflammation and degradation provided by a biological extract of Mentha spicata
Wendy Pearson, Ronald S Fletcher, Laima S Kott, Mark B Hurtig
BMC Complementary and Alternative Medicine , 2010, DOI: 10.1186/1472-6882-10-19
Abstract: HRAM and CM were incubated in simulated gastric and intestinal fluid, liver microsomes (from male rat) and NADPH. Concentrations of RA, CA, CO, and FA in simulated digest of HRAM (HRAMsim) and CM (CMsim) were determined (HPLC) and compared with concentrations in aqueous extracts of HRAM and CM. Cartilage explants (porcine) were cultured with LPS (0 or 3 μg/mL) and test article [HRAMsim (0, 8, 40, 80, 240, or 400 μg/mL), or CMsim (0, 1, 5 or 10 mg/mL), or RA (0.640 μg/mL), or CA (0.384 μg/mL), or CO (0.057 μg/mL) or FA (0.038 μg/mL)] for 96 h. Media samples were analyzed for prostaglandin E2 (PGE2), interleukin 1β (IL-1), glycosaminoglycan (GAG), nitric oxide (NO) and cell viability (differential live-dead cell staining).RA concentration of HRAMsim and CMsim was 49.3 and 0.4 μg/mL, respectively. CA, FA and CO were identified in HRAMsim but not in aqueous extract of HRAM. HRAMsim (≥ 8 μg/mL) inhibited LPS-induced PGE2 and NO; HRAMsim (≥ 80 μg/mL) inhibited LPS-induced GAG release. RA inhibited LPS-induced GAG release. No anti-inflammatory or chondroprotective effects of RA metabolites on cartilage explants were identified.Our biological extraction procedure produces a substance which is similar in composition to post-hepatic products. HRAMsim is an effective inhibitor of LPS-induced inflammation in cartilage explants, and effects are primarily independent of RA. Further research is needed to identify bioactive phytochemical(s) in HRAMsim.Rosmarinic acid (RA; C18H16O8) is a polyphenolic carboxylic acid found in many herbal plants including rosemary (Rosmarinus officinalis), oregano (Origanum vulgare) and mint (commonly Mentha spicata or Mentha × piperita). RA has widely reported biological activities in mammals and mammalian cells including antioxidant [1], anti-inflammatory [2], antitumor [3,4], immunomodulatory [5], antiviral [4] and antibacterial [6]. There is considerable scientific support for an anti-inflammatory role for RA. It has shown significant inhibitory e
Estudos de microscopia óptica e de microscopia eletr?nica de varredura em folhas de Mentha spicata e de Mentha spicata x suaveolens (Lamiaceae)
Martins, Maria Bernadete Gon?alves;
Bragantia , 2002, DOI: 10.1590/S0006-87052002000300002
Abstract: the objective of the present work is to make a study of leaf anatomy through optic microscopy and eletronic microscopy of scanning in mentha spicata l. and mentha spicata x suaveolens, characterizing the leaf blade histology. cross and paradermic sections of the leaf, showed the presence of uniseriate epidermal cells covered by a fine cuticle layer, presenting gland trichomes of multicellular type capitate and peltate and no gland trichomes, not ramified. the mesophyll of both species mantain with uniseriate palisade parenchyma only in high epidermal, prolonged cells, and rich in cytoplasmic inclusions. lacunary parenchyma is formed by 3 to 4 layers of irregular cells. the capitate trichomes are classified as type i they presented with a basal, a pedunculary and a great apical cell, whose format varies from circular to periform. peltate trichomes consist of a basal cell, a short, wide and unicellular stalk cell, with cutinized external walls and one great multicellular head with 12 secretory cells distributed in two concentrical circles. the trunk has 4 cells and the external one 8 cells, which accumulate the product of the secretion in a cavity between cuticle and the secretor cells, as the foot of glandular trichomes is inserted in 11 epidermal cells. there is a predominance of capitate trichomes in relation to peltate trichomes in both species of mentha.
Estudos de microscopia óptica e de microscopia eletr nica de varredura em folhas de Mentha spicata e de Mentha spicata x suaveolens (Lamiaceae)  [cached]
Martins Maria Bernadete Gon?alves
Bragantia , 2002,
Abstract: O presente trabalho tem como objetivo realizar um estudo de anatomia foliar por meio de microscopia óptica e de microscopia eletr nica de varredura em Mentha spicata L. e Mentha spicata X suaveolens, caracterizando histologicamente a lamina foliar. Sec es transversais e paradérmicas da regi o mediana do limbo foliar mostraram a presen a de epiderme unisseriada, coberta por uma fina camada de cutícula, apresentando tricomas glandulares do tipo capitado e peltado e n o glandulares unisseriados multicelulares, n o ramificados. O mesofilo de ambas as espécies é dorsiventral, com parênquima pali ádico uniestratificado, com células alongadas e rico em inclus es citoplasmáticas. O parênquima lacunoso é formado por três a quatro camadas de células irregulares. Os tricomas capitados presentes s o classificados como do tipo I, e apresentam-se com uma célula basal, uma célula peduncular e uma grande célula apical, cujo formato varia de circular a piriforme. Os tricomas peltados consistem de uma célula basal, uma célula peduncular curta, larga e unicelular, com paredes externas cutinizadas e uma cabe a grande multicelular com 12 células secretoras, distribuídas radialmente em dois círculos concêntricos, o central com 4 células e o externo com 8 células, as quais acumulam o produto da secre o em uma cavidade entre a cutícula e as células secretoras; o pé do tricoma glandular está inserido em 11 células epidérmicas. Há predominancia de tricomas capitados em rela o aos tricomas peltados em ambas as espécies de Mentha.
In vitro Antioxidant Activity of Polygonium hyrcanicum, Centaurea depressa, Sambucus ebulus, Mentha spicata and Phytolacca americana  [PDF]
Seyed Jalal Hosseinimehr,Fereshteh Pourmorad,Naghi Shahabimajd,Kami Shahrbandy
Pakistan Journal of Biological Sciences , 2007,
Abstract: Extracts of five plants were investigated for their total flavonoids, phenol contents and their radical scavenging activity using DPPH assays: Polygonium hyrcanicum, Centaurea depressa, Sambucus ebulus, Mentha spicata and Phytolacca americana. Quercetin and butylated hydroxy toluene were used as standard reference with well-documented antioxidant activity. Total flavonoid content in these plants ranged from 31.6 to 109.5 mg g-1 and the amount of free phenolic compounds was between 32 and 287.5 mg g-1 extract powder. Free phenolic compounds content were in the order: P. hyrcanium> M. spicata> S. ebulus> C. depressa> P. americana. It was also observed that all methanolic extract samples of studied plants showed free radical scavenging activity. The highest antioxidant activity was found in P. hyrcanium with an IC 50 equal to 0.036 mg mL-1 that is higher than BHT (IC 50 = 0.054). A correlation between radical scavenging capacities of extracts with total phenolic compounds content was observed. This result indicates that P. hyrcanium contains high levels of phenolic compounds that may contribute to higher free radical scavenging activity compared to the other extracts of the plants in this study.
Development of mint (Mentha piperita L.) grown on biosolids: evaluation of productivity and essential oil content
Scavroni, Joseane;Ferreira, Leonardo Cesar;Valmorbida, Janice;Boaro, Carmen Sílvia Fernandes;
Brazilian Archives of Biology and Technology , 2009, DOI: 10.1590/S1516-89132009000200014
Abstract: development of mentha piperita l . on biosolids amended soil with levels equivalent to 0, 28, 56 and 112 t ha-1 was evaluated. in order to measure the productivity and its relation with mint essential oil yield, different indices were determined: leaf area, total and several organ dry matter, leaf area ratio, specific leaf area, net assimilation rate and relative growth rate at 30, 44, 58, 72 and 86 days after planting (dap), and essential oil yield at 90, 110 and 120 dap. physiological indices revealed that biosolids prolonged the vegetative phase of the plants, which adapted themselves to the presence of biosolids with time. plants showed inverse behaviors in relation to productivity, resulting from the primary metabolism, represented by the shoot dry matter yield, and oil yield, resulting from the secondary metabolism. adaptation of the mint plants to the growth on biosolids could be due to a phytoremediation function of this species. the intrinsic mechanisms of these processes could be better understood in a further evaluation of residual effects in mint plant shoots.
Toxicidad aguda oral del extracto fluido de Mentha spicata L. (hierbabuena)
Lagarto Parra,Alicia; Tillán Capó,Juana; Cabrera González,Yolanda;
Revista Cubana de Plantas Medicinales , 1997,
Abstract: se estudió la toxicidad aguda oral del extracto fluido de mentha spicata l. (hierbabuena) mediante la determinación de la dosis letal media en ratones hembras, con 3 niveles de dosis del extracto fluido y el vehículo (30, 50 y 70 ml/kg). se cuantificaron las variaciones del peso corporal y alteraciones patológicas. la dosis letal media estimada del extracto fluido fue de 47,8 ml/kg por lo que se considera no clasificada según la comunidad europea. la toxicidad del extracto fluido se debe al vehículo hidroalcohólico presente en la formulación, ya que no se encontraron diferencias significativas entre las dosis letales medias del extracto y el vehículo.
Toxicidad aguda oral del extracto fluido de Mentha spicata L. (hierbabuena)
Alicia Lagarto Parra,Juana Tillán Capó,Yolanda Cabrera González
Revista Cubana de Plantas Medicinales , 1997,
Abstract: Se estudió la toxicidad aguda oral del extracto fluido de Mentha spicata L. (hierbabuena) mediante la determinación de la dosis letal media en ratones hembras, con 3 niveles de dosis del extracto fluido y el vehículo (30, 50 y 70 mL/kg). Se cuantificaron las variaciones del peso corporal y alteraciones patológicas. La dosis letal media estimada del extracto fluido fue de 47,8 mL/kg por lo que se considera no clasificada según la Comunidad Europea. La toxicidad del extracto fluido se debe al vehículo hidroalcohólico presente en la formulación, ya que no se encontraron diferencias significativas entre las dosis letales medias del extracto y el vehículo.
ELECTRONIC DISCRIMINATION OF MINT PLANTS BASED ON QUARTZ CRYSTAL MICROBALANCE SENSORS
J. B. Igat,D. B. Albano2,F. B Sevilla III
Academic Research International , 2013,
Abstract: The commonly used methods to test the authenticities of medicinal plants may either require a long and complicated task or would demand for high cost operation. In this study, six AT-cut quartz crystal microbalance (QCM) sensors, leading to the development of electronic nose, was employed as an alternative low cost and reliablemethod of differentiating commonly used mint plants - yerba buena (Mentha cordifolia opiz.), peppermint (Mentha piperita L.), and spearmint (Mentha spicata L.). The QCM sensors, with gold electrodes on both sides were coated with different sensing materials. Each plant sample was exposed to sensor chamber, with one sensor at a time. The headspace vapors from the incubated sample were carried tothe sensor chamber by a stream of nitrogen gas, and the vapors were reversibly adsorbed when in contact with the sensing layer of QCM. The sensor gave a steady response to the headspace vapors, and exhibited good reversibility and reproducibility at an acceptable response time. The integrated response of all the sensors, using polar plot, created an odor graphical profile of each plant. A good discrimination of the plant samples was achieved by Principal Component Analysis(PCA) using the commercial Six Sigma Minitab15 software program.
The effect of inoculation with plant growth rhizobacteria (PGPR) on root formation of mint (Mentha piperita L.) cuttings
HC Kaymak, F Yarali, I Guvenc, MF Donmez
African Journal of Biotechnology , 2008,
Abstract: This study was conducted both in field and greenhouse conditions at Atatürk University, College of Agriculture, Erzurum, Turkey, during 2004 and 2006. The objective of this study was to determine the effect of some bacteria isolates on root formation, root length and dry matter content of roots of mint (Mentha piperita L.). Mint and Agrebacterium rubi (strain A16), Burkholderia gladii (strain BA7), Peseudomonas putidea (strain BA8), Bacillus subtilus (strain OSU142) Bacillus megatorium (strain M3) were used as rooting agent, respectively. The highest rooting percentage was obtained by application of A16 (88.70; 89.85%), M3 (86.12; 91.15%) and BA8 (87.27; 87.77%). Overall, the lowest was observed in controls (79.31 and 76.96). Root length was greater when cuttings were treated with BA7, A16 and M3 compared to the other treatments. Mint cuttings inoculated with M3 had more dry matter content than control and the other treatments in both experiments. Rooting performance, root length and dry matter content of root, cuttings of mint treated with bacterial solutions showed better performance than control cuttings in both experiments. In addition, when evaluated bacteria strains were compared, M3 was found more effective than the others on the examined properties.
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