Photosynthetic Microorganisms

Singh, Shailendra Kumar; Sundaram, Shanthy; Kishor, Kaushal

doi:10.1007/978-3-319-09123-5

Cited by 17 publications

(5 citation statements)

References 261 publications

(387 reference statements)

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“…FYM) in helping to enhance the ability of soils to hold and conserve moisture that had been trapped by tied ridges. These results concurred with the previous reports by [45], who reported that practices such as addition of manure and maintenance of crop residues among other practices were found to improve soil structure thereby increasing water infiltration into the rooting zone of crops and minimize evaporation losses for increased rain-fed crop productivity. Thus it is important to consider the use of FYM on plots that have water harvesting for increased water use efficiency for sustainable crop productivity.…”

Section: Interaction Effect Of Water Harvesting (Wh) and Soil Fertility Management (Sfm) On Water Use Efficiency (Wue)supporting

confidence: 92%

Influence of Crop Rotation and Soil Fertility Management Strategies on Water Use Efficiency of Wheat in a Changing Climate in Njoro Sub-County in Kenya

Ooro

Birech

Malinga

et al. 2020

JEAI

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Aims: The study determined the effect of soil fertility management (inorganic and organic N sources) and short term crop rotation (cereal – legumes cropping systems) on water use efficiency of wheat in high potential areas. Study Design: A randomized complete block design was used with split-split-plot arrangement replicated three times. Three factors evaluated included water harvesting (WH), crop rotation (CR) and soil fertility management (SFM). The data obtained were subjected to an analysis of variance (ANOVA) using Genstat statistical package while the mean separation was performed using least significance differences (P =.05). Place and Duration of Study: The trial was conducted at the Kenya Agricultural and Livestock Research Organization (KALRO) fields based in Njoro for three years between 2014 and 2016 during rainy seasons. Methodology: Water harvesting was evaluated at consisted of flat beds (WH1) and tied ridges (WH2), crop rotation was tested at four levels comprising of Wheat- Dolichos lablab (Lablab purpureum)-Wheat- L. purpureum (CR1); Wheat-Greenpea (P. sativum) –Wheat (Triticum aestivum L)- P. sativum (CR2); T. aestivum L-potato- P. sativum –Potato (Solanum tuberosum) (CR3); and Wheat-Wheat-Wheat-Wheat) (CR4). Six different soil fertility management (SFM) strategies evaluated included SFM1 = untreated control; SFM2 = Farm Yard Manure at 5 t ha-1; SFM3 = Green manure (L.eucaena triachandra) at 2.5 mt ha-1; SFM4 = Calcium Ammonium Nitrate (CAN) at 25 kg N ha-1; SFM5 = Calcuim Ammonium Nitrate at 50 kg N ha-1; and SFM6 = Ammonium Nitrate (CAN) at 75 kg N ha-1. The Water harvesting (WH) and SFM were fixed on the same plot at the form and rate for the entire period of the study while crops were rotated between seasons. Water use efficiency was derived as a ratio of water use and grain yield and biomass. Results: Results revealed significant (P =.05) effect of crop rotation and soil fertility management on water use efficiency. However, water harvesting did not influence. While interaction of CR and SFM significantly (P =.05) influenced WUE and grain yield. Significant influence was also observed on WUE due to an interaction between WH and SFM. Dolichos lablab (L. purpureum) and green pea as pre-crops resulted in higher yield than when potato was the pre-crop and continuous wheat. Use of inorganic N fertilizer with L. purpureum as a pre-crop resulted in higher grain yield than all other soil fertility management strategies evaluated. In conclusion, the use of green pea as a pre-crop during the short rain followed by wheat in long rains is a beneficial crop rotation systems and a climate smart strategy. In addition, organic N sources should be recommended for sustainable wheat production because it will positively influence the accumulation and slow release of soil moisture for increased water use efficiency.

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Section: Interaction Effect Of Water Harvesting (Wh) and Soil Fertility Management (Sfm) On Water Use Efficiency (Wue)supporting

confidence: 92%

Influence of Crop Rotation and Soil Fertility Management Strategies on Water Use Efficiency of Wheat in a Changing Climate in Njoro Sub-County in Kenya

Ooro

Birech

Malinga

et al. 2020

JEAI

View full text Add to dashboard Cite

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“…According to the void formation mechanism 4, the dry state of the semipreg fabric is considered as governed by microflow, hence the void formation is reduced when compared to processes where macroflow control. 4 As a matter of fact, the higher packing capability of carbon fibers results in higher resistance to the percolation of the matrix by a porous media than glass fibers, and this phenomenon was already observed in previous studies. [20][21][22][23] The plain weave also increases tortuosity of the flow and decreases the impregnation velocity, promoting more porous regions for preforms that require longer impregnation time -due to the high resistance of the medium to flow.…”

Section: Impregnation Behaviorsupporting

confidence: 53%

“…2,3 Semipreg is a particular type of prepregs in which only a portion of the fiber arrangement is impregnated with resin (the other one is maintained in a dry state). 4 The dry regions allow a pathway for entrapped air to escape from the laminate leading to lower porosities in the final composite.…”

Section: Introductionmentioning

confidence: 99%

Creep behavior of polyetherimide semipreg and epoxy prepreg composites: Structure vs. property relationship

Reis

Monticelli

Neves

et al. 2020

Journal of Composite Materials

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In the present study, the creep behavior of polyetherimide semipreg and epoxy prepreg composites was studied using dynamic mechanical analyzer and focused on structure vs. property relationships in glassy, glass transition, and elastomeric regions. The main contribution to the field is to study pre-impregnated materials concerning creep behavior, mainly based on different analytical models, and microstructure. Two different reinforcements were used (carbon fiber and glass fiber) for each matrix. Findley, Burger, and Weibull analytical models were applied with an excellent fit for the most of them. The impregnation quality, verified by C-scan and the void content by acid digestion, shows different impregnation behaviors, mainly for epoxy/CF, which also influenced molecular motion behavior. The creep behavior was mainly influenced by matrix type than reinforcement architecture and void content. In addition, the creep was higher for epoxy in the glassy region; however, in the glass transition region, higher deformation was found for polyetherimide composites. Previous behavior is mainly attributed to higher energy storage in the glassy region which plays a significant role in the dissipation (glass transition energy), resulting in the energy loss or the drop of storage modulus in a narrow temperature range – more abrupt. This behavior was corroborated by time-temperature superposition curves in which the low deformation obtained for polyetherimide composites at low temperatures is maintained only until the glass transition temperature. Epoxy composites showed a higher initial creep deformation, but the values were almost constant with temperature, even when the temperature passes by the glass transition temperature.

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“…Given their remarkable ability to fix CO2, there is a promising potential for designing CO2 capture systems based on microalgae, as they require minimal space and resources, exhibiting an efficiency 10 to 50 times higher than other photosynthetic organisms. Additionally, the prospect of using microalgae as a food source gains traction due to their non-competition with terrestrial crops for agricultural land (Singh et al 2014).…”

Section: Impact Of the Exposure Of Mercury In The Phytoplanktonmentioning

confidence: 99%

The Impact of Naturally Occurring Phytoplankton on Mercury Biogeochemical Cycling in Aquatic Ecosystems: Implications for Global Mercury Pollution and Public Health

2023

IRJMETS

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The biogeochemical cycling of mercury in aquatic ecosystems is a multifaceted process influenced by various factors, including ambient temperature, seasonal fluctuations, the activity of methylating bacteria, dissolved oxygen levels, and the interaction of mercury with dissolved organic matter (DOM). Consequently, a significant portion of mercury contamination originating from human activities, which had previously settled in sediments, is reintroduced into the water column, primarily in the form of highly toxic organic mercury compounds like methylmercury and dimethylmercury. This phenomenon is particularly pronounced in the shallow coastal waters of industrialized regions across the globe. Naturally occurring phytoplankton serve as the primary entry point for these highly toxic mercury forms into the aquatic food web. The availability of mercury, its uptake by phytoplankton, its impact on population size, cell toxicity, subsequent biotransformation, and intracellular stability within phytoplankton are of paramount importance for human health. It is important to note that the mercury sequestered inside phytoplankton cells, owing to biomagnification effects, eventually finds its way into aquatic wildlife, fish, seafood, and ultimately, the human diet. This review aims to provide an overview of recent findings on the interaction between organic mercury forms and natural phytoplankton. Additionally, it offers fresh insights into this intricate relationship and suggests potential directions for future research, with a focus on preventing mercury biomagnification considering scenarios involving climate change and increasing global pollution.

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Photosynthetic Microorganisms

Cited by 17 publications

References 261 publications

Influence of Crop Rotation and Soil Fertility Management Strategies on Water Use Efficiency of Wheat in a Changing Climate in Njoro Sub-County in Kenya

Influence of Crop Rotation and Soil Fertility Management Strategies on Water Use Efficiency of Wheat in a Changing Climate in Njoro Sub-County in Kenya

Creep behavior of polyetherimide semipreg and epoxy prepreg composites: Structure vs. property relationship

The Impact of Naturally Occurring Phytoplankton on Mercury Biogeochemical Cycling in Aquatic Ecosystems: Implications for Global Mercury Pollution and Public Health

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