Results 81 to 90 of about 345,655 (307)
Sample Design-based Methodology for Estimating Delta Smelt Abundance
San Francisco Estuary and Watershed Science, 2008 A sample design-based procedure for estimating pre-adult and adult delta smelt abundance is described. Using data from midwater trawl surveys taken during the months of September, October, November, and December for the years 1990 through 2006 and ...
Ken B. Newman
doaj
Deep Underground Science and Engineering, EarlyView.An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang +5 more
wiley +1 more source
Transmission errors in precision worm gear drives [PDF]
Transmission error is a measure of the positioning accuracy of a gear system. This has been widely documented in gearing for many years as the source of problems in noise and vibration.
Fish, Michael Anderson
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Revista de Biología Tropical, 2008 Se realizó un estudio orientado a evaluar tres tipos de trampas (eficiencia de captura, estructura de tallas, selectividad y composición de especies) para la captura de peces marinos en el Golfo de California.
Manuel O Nevárez-Martínez +5 more
doaj
Russian Journal of Agricultural and Socio-Economic Sciences, 2021 Danish seine (Cantrang) is a controversial fishing gear caused by it considered as destructive fishing and has a low level of selectivity. A policy regulation on the prohibition of using Cantrang as fishing gear in Indonesia has been issued through the ...
Ravanelli R. +2 more
doaj +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This work reports one‐pot synthesized novel zwitterionic polydopamine‐silica (ZSiPDA) nanofillers for fabricating PES hybrid ultrafiltration membranes with enhanced hydrophilicity, permeability, and antifouling performance. The optimized membrane achieved over 91% humic acid removal and showed strong potential for municipal wastewater treatment.
Roqaya A. Ismail +5 more
wiley +1 more source
Gear, J.H.S. --- 1953-82 -- Correspondence, Individual -- letter, 1963-11-15 [PDF]
, 1963 Letter from Gear, James H. S. to Sabin, Albert B.
Gear, James H. S. (James Henderson Sutherland), 1905-
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Aquatic Living Resources, 2017 Obtaining data to study fish biology can be a challenge if a stock is fished by a variety of gears with different effort units and different selectivity, particularly if these gears only partially overlap in space and time.
Pappa Marianna +6 more
doaj +1 more source
Stereoselective Construction of Benzo‐Fused Tetrahydropyrrole Thiazines From Saccharin
European Journal of Organic Chemistry, EarlyView.Saccharin was used as a template to construct a series of 10a‐substituted, benzo‐fused, pyrrolo thiazinone dioxides. Thereafter, diastereo‐divergent 10‐keto reduction gave either diastereomeric alcohol in a process that did not rely on the substituent at 10a's identity.
Seanán Doyle +8 more
wiley +1 more source
Gear, J.H.S. --- 1953-82 -- Correspondence, Individual -- letter, 1978-09-29 [PDF]
, 1978 Letter from Gear, James H. S. to Sabin, Albert B.
Gear, James H. S. (James Henderson Sutherland), 1905-
core