scholarly journals Present status and problems in monitoring of marine environment and bioresources in the waters around Hokkaido: Outline of the research work in the Hokkaido Prefectural Fisheries Experiment Station

2009 ◽  
Vol 75 (5) ◽  
pp. 942-946 ◽  
Author(s):  
HIDEO YOSHIDA
Keyword(s):  
Marine Environment ◽  
Present Status ◽  
Research Work ◽  
Experiment Station

scholarly journals Evaluation of microfiber release from jeans: the impact of different washing conditions

2021 ◽  
Author(s):  
Aravin Prince Periyasamy
Keyword(s):  
Marine Environment ◽  
Average Length ◽  
Research Work ◽  
Spin Speed ◽  
Main Factors ◽  
Population Crisis ◽  
The Impact ◽  
Wash Load

AbstractMicroplastic particles are a burgeoning population crisis in the marine environment. This research examines the emission of microfibers from three different jeans (garments) during domestic washing. The jeans types, washing temperature, washing duration, spin speed, detergent types, and addition of conditioner are the main factors for this research work. The average length and diameter of the microfibers for the 100% PET jeans (jeans-P) has 7800 ± 4000 μm and 11.9±3.2 μm and for polyester/cotton jeans (jeans-PB) has 4900 ± 2200 μm 17.4±4.8 μm, respectively. The maximum microfiber released was observed in the rigorous washing treatment (90 min, 60°C, 1400 rpm, powder detergent with the presence of conditioner). The surmised number of microfibers discharged from the 1 kg wash load of jeans-P was calculated within the extent of 2300000–4900000 microfibers, and it is varied by the washing treatments.

scholarly journals Studies in the winterkilling of cereals

1917 ◽  
Author(s):  
◽  
Harlan Randolph Sumner
Keyword(s):  
Future Development ◽  
Present Status ◽  
Experiment Station

"It is the object of this thesis to outline the present status of the problem of winterkilling in cereals and to report certain preliminary experiments, indicative of future development, which were conducted by the writer in the winter of 1916-1917 at the Missouri Experiment Station."

Progress of Mechanism and Research Methods of Marine Corrosion of Steels

2011 ◽  
Vol 80-81 ◽  
pp. 3-6
Author(s):  
Jie Yang ◽  
Guang Feng Xi ◽  
Xi Qiu Fan
Keyword(s):  
Research Methods ◽  
Marine Environment ◽  
Influence Factor ◽  
Research Work ◽  
Influence Factors ◽  
Corrosion Mechanism ◽  
Marine Environments ◽  
Marine Corrosion ◽  
Great Loss

Steel constructions located in marine environments are exposed to more serious corrosion than in other environments, which result in great loss in lives and economy. So it is very important to carry out research work on the influence factor and mechanism of marine corrosion with necessary methods. In this paper, influence factors in marine environment of steels were discussed, the corrosion mechanism of five different zones in marine environment was summarized and the progress of research methods for marine corrosion was reviewed.

scholarly journals Review on Dissolved Organic Carbon and Particulate Organic Carbon in Marine Environment

2018 ◽  
Vol 23 (1) ◽  
pp. 25
Author(s):  
Radha Karuna Kumari ◽  
P. M. Mohan
Keyword(s):  
Coral Reef ◽  
Organic Carbon ◽  
Particulate Organic Carbon ◽  
Marine Environment ◽  
Research Work ◽  
Current Status ◽  
Reef Environment ◽  
Essential Step ◽  
Open Sea ◽  
Coral Reef Environment

Quantification the Dissolved and Particulate organic carbon in marine waters is an essential step towards ecosystem modeling and understanding carbon sequestration processes. A detailed view of estimated and recorded carbon concentration from Arctic to Antarctic is the prime goal of this review. This review compiles some of the important research work carried out in quantifying the organic carbon available in off shore and open waters and in coral reef environment. The cited literatures were collected, grouped and carefully analyzed to give a comprehensive view on current status of marine environment with regard to distribution of dissolved and particulate organic carbon. Keywords: DOC, POC, continental shelf waters, open sea waters, coral reef environment.

scholarly journals First record of Ubaghsicystis (Eocrinoidea - Echinodermata) from the Cambrian (Miaolingian, Wuliuan) of Sonora, Mexico: Biostratigraphical and paleoecological considerations

2021 ◽  
Vol 69 (Suppl.1) ◽  
pp. 51-65
Author(s):  
Blanca-Estela Buitrón-Sánchez ◽  
Francisco-Javier  Cuen-Romero ◽  
Matilde-Sylvia Beresi ◽  
Rogelio Monreal
Keyword(s):  
Marine Environment ◽  
Research Work ◽  
First Record ◽  
Sedimentary Sequence ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
Stratigraphic Section ◽  
Invertebrate Fossils ◽  
First Time ◽  
Open Shelf

Introduction: The present work constitutes the first record of Ubaghsicystis Gil-Cid & Domínguez-Alonso (Echinodermata-Eocrinoidea) in the El Gavilán Formation, exposed in the El Sahuaral Hill, a new Cambrian locality of central Sonora, Mexico. The El Gavilán Formation is a sedimentary sequence mainly made up of shale interbedded with limestone, with abundant invertebrate fossils, deposited in an open shelf marine environment. Objective: The main objective of this research work is to describe the species Ubaghsicystis cf. U. segurae for the first time in Mexico, in addition to biostratigraphic and paleoecological considerations. Methods: A composite stratigraphic section of the El Gavilán Fm. was measured in central Sonora, where samples corresponding to eocrinods were collected, the material was examined in the Microscope Leica MZ10.  Results: The biotic association is composed of reticulosan sponges, chancelloriids (Chancelloria eros, Allonnia tintinopsis, Archiasterella sp.), hyolithids, brachiopods, trilobites (Quadragnostus depressa, Peronopsis sp., Tonkinella valida, and Elrathina sp.), and echinoderms (Ubaghsicystis cf. U. segurae). Regarding the age, the trilobite association establishes a chronostratigraphic position from the middle Cambrian (Miaolingian, Wuliuan), Altiocculus Subzone, Ehmaniella Zone. The material studied is constituted by isolated echinoderm plates, which probably represent various cycles of theca plates assigned to Ubaghsicystis cf. U. segurae. The genus Ubaghsicystis has been scarcely recorded in a few Cambrian regions (e.g., Burgess Shale in Canada and Los Barrios de Luna in Spain), so that the information about this taxon is limited. Conclusions: The Cambrian succession of Sonora, where Ubaghsicystis occurred, was part of the border from the Laurentia craton during this period, located near the Paleoequator during this period, where ideal conditions for increasing diversity and abundance of species were developed, including echinoderms.

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