Results 91 to 100 of about 8,353 (223)

PACl coagulation for the solid-liquid separation of highly concentrated algae suspensions

open access: yesDesalination and Water Treatment, 2010
The ability of algae to absorb CO2, a greenhouse gas, for photosynthesis has received considerable attention in recent years due to the possibility of growing algae to extract into bio-energy. Therefore, technology that rapidly separates and recovers an algal mass from water is needed. In this study, the coagulant polyaluminum chloride (PACl) with high
Wen Po Cheng, Wei Yi Chen, Ruey Fang Yu
openaire   +1 more source

The pacL gene of Synechococcus sp. strain PCC 7942 encodes a Ca(2+)-transporting ATPase [PDF]

open access: yesJournal of Bacteriology, 1994
An ATP-dependent Ca2+ uptake activity was identified in plasma membrane vesicles prepared from Synechococcus sp. strain PCC 7942. This activity was insensitive to agents which collapse pH gradients and membrane potentials but sensitive to vanadate, indicating that the activity is catalyzed by a P-type Ca(2+)-ATPase. A gene was cloned from Synechococcus
T, Berkelman   +2 more
openaire   +2 more sources

Phenotypic, Floristic, and Anthropogenic Drivers of the Pollen Niche of Amazonian Stingless Bees

open access: yesBiotropica, Volume 57, Issue 3, May 2025.
The pollen diversity and composition collected by Amazonian stingless bees depend on their body mass, tree composition, and urbanization. Further, bees have been collecting fewer pollen types since the 1970s. ABSTRACT Stingless bees (Apidae: Meliponini) are major pollinators in the tropics, supporting key ecosystem services.
Daniel Bastos Pimenta   +3 more
wiley   +1 more source

Evaluation of Impact of Coagulant Type on Operation Parameters in Direct Filtration [PDF]

open access: yesآب و فاضلاب, 2007
Numerous advantages have been reported on PAC (poly aluminum chloride) used as a coagulant over other coagulants such as alum and ferric chloride used in conventional water treatment process with medium and high turbidity levels.
Ali Torabian   +2 more
doaj  

Timeless path integral for relativistic quantum mechanics

open access: yes, 2013
Starting from the canonical formalism of relativistic (timeless) quantum mechanics, the formulation of timeless path integral is rigorously derived. The transition amplitude is reformulated as the sum, or functional integral, over all possible paths in ...
Arthurs E   +16 more
core   +1 more source

Classifying Flash Flood Disasters From Disaster‐Prone Environments to Support Mitigation Measures

open access: yesWater Resources Research, Volume 61, Issue 4, April 2025.
Abstract Spatiotemporal heterogeneities in climatic, physiographic, and socio‐economic environments cause complex and varied formation mechanisms in flash flood disasters. However, previous studies were usually conducted at event or catchment scale in specific environments.
Xiaoyan Zhai   +8 more
wiley   +1 more source

Quantifying and characterizing major DOC fractions in water treatment processes: A simplified SPE method without recovering sorbed compounds

open access: yesWater Environment Research, Volume 97, Issue 2, February 2025.
Assessing the quantity and characteristics of HPI DOC in Bond Elut ENV filtrates at pH 3 and 7. Abstract Practitioners often use specific UV254 absorption (SUVA) as an indicator of hydrophobic (HPO) dissolved organic carbon (DOC) to evaluate removal efficiency and estimate trihalomethane formation potential (THMFP).
Saeideh Mirzaei, Beata Gorczyca
wiley   +1 more source

Short term entry barriers may be good for long term competition [PDF]

open access: yes, 2008
Entry barriers encourage competition “for” the market as opposed to “in” the market. Efficient entrants use penetrating strategies while inefficient incumbents harvest the market before leaving.
Ponssard, Jean-Pierre
core   +1 more source

Dynamic Response of Sizes of Humic Acid-Kaolin-PACl Aggregates [PDF]

open access: yes
[[abstract]]The most commonly used experimental techniques to monitor the aggregation kinetics and to characterize structures of aggregates are scattering of light, X-rays and neutrons. We investigated in this study the coagulation dynamics for the humic
吳容銘
core   +1 more source

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