73,352 results match your criteria cover soil

Mechanistic understanding of the pollutant removal and transformation processes in the constructed wetland system.

Water Environ Res 2021 Jun 15. Epub 2021 Jun 15.

Environmental Hydrology Division, National Institute of Hydrology, Jalvigyan Bhawan, Roorkee, Uttarakhand, 247667, India.

Constructed wetland systems (CWs) are biologically and physically engineered systems to mimic the natural wetlands which can potentially treat the wastewater from the various point and non-point sources of pollution. The present study aims to review the various mechanisms involved in the different types of CWs for wastewater treatment and to elucidate their role in the effective functioning of the CWs. Several physical, chemical, and biological processes substantially influence the pollutant removal efficiency of CWs. Read More

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Distinct Phenotypes Associated with Mangrove and Lagoon Habitats in Two Widespread Caribbean Corals, and .

Biol Bull 2021 Jun 24;240(3):169-190. Epub 2021 May 24.

AbstractAs coral reefs experience dramatic declines in coral cover throughout the tropics, there is an urgent need to understand the role that non-reef habitats, such as mangroves, play in the ecological niche of corals. Mangrove habitats present a challenge to reef-dwelling corals because they can differ dramatically from adjacent reef habitats with respect to key environmental parameters, such as light. Because variation in light within reef habitats is known to drive intraspecific differences in coral phenotype, we hypothesized that coral species that can exploit both reef and mangrove habitats will exhibit predictable differences in phenotypes between habitats. Read More

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Mass Spectrometry Imaging of Fibroblasts: Promise and Challenge.

Expert Rev Proteomics 2021 Jun 15. Epub 2021 Jun 15.

Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston SC USA.

Introduction: Fibroblasts maintain tissue and organ homeostasis through output of extracellular matrix that affects nearby cell signaling within the stroma. Altered fibroblast signaling contributes to many disease states and the extracellular matrix secreted by fibroblasts has been used to stratify patient by outcome, recurrence and therapeutic resistance. Recent advances in imaging mass spectrometry allow access to single cell fibroblasts and their ECM niche within clinically relevant tissue samples. Read More

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A comparative study of the efficiency and safety of chemotherapy as a therapeutic method for recurrent or resistant gestational trophoblastic neoplasia: A protocol for systematic review and meta-analysis.

Medicine (Baltimore) 2021 Jun;100(24):e26263

Department of Obstetrics and Gynecology, the First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, China.

Background: Gestational trophoblastic neoplasia (GTN) is an infrequent spectrum of placental malignant cases. Generally, single-agent or multiple-agent chemotherapy is used to treat the condition. The condition has a significant impact on women in the childbearing age, which makes post-chemo fertility and obstetrical results a significant contemplation. Read More

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Evaluation of efficiency and safety of oral corticosteroid therapy in children patients with exacerbations of asthma: A protocol for systematic review and meta-analysis.

Medicine (Baltimore) 2021 Jun;100(24):e26250

Department of Pediatrics, the First People's Hospital of Jiangxia District.

Background: Asthma is the most frequently occurring obstructive airway disease, it inflicts the highest morbidity among children. Among the paediatric populace, severe exacerbations of asthma are a common reason behind patient consultations and hospitalizations. Oral corticosteroids are a primary component in the treatment of asthma exacerbations; however, there is controversy regarding how corticosteroids functions. Read More

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Activation and conversion of alkanes in the confined space of zeolite-type materials.

Chem Soc Rev 2021 Jun 15. Epub 2021 Jun 15.

Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.

Microporous zeolite-type materials, with crystalline porous structures formed by well-defined channels and cages of molecular dimensions, have been widely employed as heterogeneous catalysts since the early 1960s, due to their wide variety of framework topologies, compositional flexibility and hydrothermal stability. The possible selection of the microporous structure and of the elements located in framework and extraframework positions enables the design of highly selective catalysts with well-defined active sites of acidic, basic or redox character, opening the path to their application in a wide range of catalytic processes. This versatility and high catalytic efficiency is the key factor enabling their use in the activation and conversion of different alkanes, ranging from methane to long chain n-paraffins. Read More

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Use of Soft Contact Lens for Esthetic and Functional Rehabilitation.

Eye Contact Lens 2021 07;47(7):383-387

Eye Department of Contat lenses (P.P.Y. and V.F.S.), Hospital Sadalla Amin Ghanem, Joinville, SC, Brazil; Department of Ophthalmology (S.A.S.), Medical School, State University of Sao Paulo-UNESP, Botucatu, SP, Brazil; and Department of Biostatistic (C.R.P.), Biosciences Institute, State University of Sao Paulo-UNESP, Botucatu, SP, Brazil.

Objective: To report the outcomes and complications of colored soft contact lenses (SCLs) to improve esthetic or eye function in visually impaired (VI) or blind patients.

Methods: This retrospective study enrolled consecutive patients with unilateral or bilateral VI or blindness who had received colored SCLs to improve appearance or ocular function. Data were collected on demographics, complaints, complete ophthalmological examinations, types of SCL, follow-ups, and complications. Read More

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Two-Step Thermal Annealing: An Effective Route for 15 % Efficient Quasi-2D Perovskite Solar Cells.

Chempluschem 2021 Jun 14. Epub 2021 Jun 14.

Department of Chemistry and INSTM, University of Pavia, Via Taramelli 14, 27100, Pavia, Italy.

Invited for this month's cover are collaborators from University of Pavia, École Polytechnique Fédérale de Lausanne, University of Messina and Istituto Italiano di Tecnologia. The cover picture shows the crystal structure of a Ruddlesden-Popper quasi-2D perovskite with chemical formula (PEA) MA Pb I (with PEA: phenylethylammonium and MA: methylammonium). The subscript 40 indicates the number of PbI octahedra separated by a double layer of PEA cations. Read More

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Room-Temperature Phosphorescence Emitters Exhibiting Red to Near-Infrared Emission Derived from Intermolecular Charge-Transfer Triplet States of Naphthalenediimide-Halobenzoate Triad Molecules.

Chemistry 2021 Jun 14. Epub 2021 Jun 14.

Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.

Invited for the cover of this issue is Toshikazu Ono, Yoshio Hisaeda and co-workers at Kyushu University and their collaborators at Ochanomizu University, Chuo University, and Institute for Molecular Science. The image depicts a molecular assembly structure shining like a jewel, glowing in the red-to-near infrared region. Read the full text of the article at 10. Read More

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Brachial muscle injury resulting in acute compartment syndrome of the upper arm: a case report and literature review.

BMC Musculoskelet Disord 2021 Jun 14;22(1):545. Epub 2021 Jun 14.

Department of Orthopedic Trauma, The First Hospital of Jilin University, No. 71 Xinmin Street, Changchun, 130021, Jilin, China.

Background: Acute compartment syndrome (ACS) is a potentially devastating condition. ACS is rare in the upper arm.

Case Presentation: We report a case of acute compartment syndrome of the anterior compartment of the upper arm due to brachial muscle injury. Read More

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Rare earth element migration and impact of Dicranopteris dichotoma at mines in south China.

Chemosphere 2021 Sep 31;278:130433. Epub 2021 Mar 31.

State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou, Fujian, China; Institute of Geography, Fujian Normal University, Fuzhou, Fujian, China; School of Geographical Sciences, Fujian Normal University, Fuzhou, Fujian, China.

The migration of rare earth elements (REEs) has a major influence on the environment. However, little is known about REEs migration control by Dicranopteris dichotoma at REEs mines. Therefore, this study examined the horizontal and vertical migration of REEs using artificial rainfall and naive soil column experiments, respectively, and the REEs migration control of Dicranopteris dichotoma at REEs mines in south China. Read More

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September 2021

Performance Impact of Coexistence Groups in a GAA-GAA Coexistence Scheme in the CBRS Band.

IEEE Trans Cogn Commun Netw 2020 ;7(1)

Communications Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA.

The General Authorized Access (GAA) users in the Citizens Broadband Radio Service (CBRS) band are the lowest priority users. They must make sure that they do not cause harmful interference to the higher tier users while cooperating with each other to minimize potential interference among themselves. Thus, efficient GAA coexistence scheme is essential for the operation of GAA users and to obtain high spectrum utilization. Read More

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January 2020

Managing Local Stressors for Coral Reef Condition and Ecosystem Services Delivery Under Climate Scenarios.

Front Mar Sci 2018 Nov;5

Joint Institute of Marine and Atmospheric Research, University of Hawai'i at Mānoa, Honolulu, HI, United States.

Coral reefs provide numerous ecosystem goods and services, but are threatened by multiple environmental and anthropogenic stressors. To identify management scenarios that will reverse or mitigate ecosystem degradation, managers can benefit from tools that can quantify projected changes in ecosystem services due to alternative management options. We used a spatially-explicit biophysical ecosystem model to evaluate socio-ecological trade-offs of land-based vs. Read More

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November 2018

Tackling the chemical diversity of microbial nonulosonic acids - a universal large-scale survey approach.

Chem Sci 2020 Feb 24;11(11):3074-3080. Epub 2020 Feb 24.

Department of Biotechnology, Delft University of Technology 2629 HZ Delft The Netherlands

Nonulosonic acids, commonly referred to as sialic acids, are a highly important group of nine-carbon sugars common to all domains of life. They all share biosynthetic and structural features, but otherwise display a remarkable chemical diversity. In humans, sialic acids cover all cells which makes them important for processes such as cellular protection, immunity and brain development. Read More

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February 2020

Molecular dynamics simulation for membrane separation and porous materials: A current state of art review.

J Mol Graph Model 2021 Jun 5;107:107947. Epub 2021 Jun 5.

Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada; Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada. Electronic address:

Computational frameworks have been under specific attention within the last two decades. Molecular Dynamics (MD) simulations, identical to the other computational approaches, try to address the unknown question, lighten the dark areas of unanswered questions, to achieve probable explanations and solutions. Owing to their complex microporous structure on one side and the intricate biochemical nature of various materials used in the structure, separative membrane materials possess peculiar degrees of complications. Read More

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Crossing a critical threshold: Accelerated and widespread land use changes drive recent carbon and nitrogen dynamics in Vichuquén Lake (35°S) in central Chile.

Sci Total Environ 2021 Jun 2;791:148209. Epub 2021 Jun 2.

Instituto Pirenaico de Ecología (IPE-CSIC), Avenida Montañana, 1005, Zaragoza 50059, Spain.

Global afforestation/deforestation processes (e.g., Amazon deforestation and Europe afforestation) create new anthropogenic controls on carbon cycling and nutrient supply that have not been fully assessed. Read More

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Land-use dynamics associated with mangrove deforestation for aquaculture and the subsequent abandonment of ponds.

Sci Total Environ 2021 Jun 7;791:148320. Epub 2021 Jun 7.

Yayasan Konservasi Alam Nusantara (The Nature Conservancy in Indonesia), Graha Iskandarsyah 3rd Floor, Jl. Iskandarsyah Raya No. 66C, Kebayoran Baru, Jakarta, 12160, Indonesia.

The objective of this study was to evaluate the spatiotemporal dynamics of large area mangrove deforestation, aquaculture pond building, and the subsequent abandonment of ponds in a large delta in Indonesia, namely the Mahakam Delta. So, we developed and applied a novel methodology for exploring the lifespan of aquaculture ponds. Using historical multispectral and radar data, the lifespans of aquaculture ponds across the delta were estimated via a chronological analysis of the landscape into four different states: primary mangroves → deforested mangroves → ponds → abandoned/inactive ponds. Read More

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Structure and concept of ICU rounds: the VIS-ITS survey.

Med Klin Intensivmed Notfmed 2021 Jun 14. Epub 2021 Jun 14.

Medical ICU, Department of Medicine, University of Tübingen, Otfried-Müller-Str. 10, 72076, Tübingen, Germany.

Objective: To gather data about structural and procedural characteristics of patient rounds in the intensive care unit (ICU) setting.

Design: A structured online survey was offered to members of two German intensive care medicine societies.

Measurements And Main Results: Intensivists representing 390 German ICUs participated in this study (university hospitals 25%, tertiary hospitals 23%, secondary hospitals 36%, primary hospitals 16%). Read More

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Fat-Covered Islet Transplantation using Epididymal White Adipose Tissue.

J Vis Exp 2021 May 25(171). Epub 2021 May 25.

Department of Regenerative Medicine and Transplantation, Faculty of Medicine, Fukuoka University; Center for Regenerative Medicine, Fukuoka University Hospital.

Islet transplantation is a cellular replacement therapy for severe diabetes mellitus. The intraperitoneal cavity is typically the transplant site for this procedure. However, intraperitoneal islet transplantation has some limitations, including poor transplant efficacy, difficult graft detection ability, and a lack of graftectomy capability for post-transplant analysis. Read More

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It is like 'judging a book by its cover': An exploration of the lived experiences of Black African mental health nurses in England.

Isaac Tuffour

Nurs Inq 2021 Jun 14:e12436. Epub 2021 Jun 14.

University of Wolverhampton, Wolverhampton, UK.

The aim of this paper was to explore the experiences of perceived prejudices faced in England by Black African mental health nurses. Purposive sampling was used to identify five nurses from sub-Saharan Africa. They were interviewed using face-to-face semi-structured interviews. Read More

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Extracellular vesicles and homeostasis-An emerging field in bioscience research.

FASEB Bioadv 2021 Jun 17;3(6):456-458. Epub 2021 Mar 17.

Department of Cell Biology and Physiology Washington University St. Louis MO USA.

To keep abreast of developments in the biological sciences and in parallel fields such as medical education, () has created a special collections category, special collections ( SC), that target, among other topics, emerging disciplines in the biomedical sciences. This SC is focused on the emerging field of extracellular vesicles (EVs) and homeostasis. Leading investigators in the biology of EVs around the globe have contributed to this collection of articles that cover the gamut of research activities from biogenesis and secretion to physiological function. Read More

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Emerging Therapeutics Based on the Amino Acid Neurotransmitter System: An Update on the Pharmaceutical Pipeline for Mood Disorders.

Chronic Stress (Thousand Oaks) 2021 Jan-Dec;5:24705470211020446. Epub 2021 Jun 2.

Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA.

Mood disorders represent a pressing public health issue and significant source of disability throughout the world. The classical monoamine hypothesis, while useful in developing improved understanding and clinical treatments, has not fully captured the complex nature underlying mood disorders. Despite these shortcomings, the monoamine hypothesis continues to dominate the conceptual framework when approaching mood disorders. Read More

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Wear of contemporary dental composite resin restorations: a literature review.

Restor Dent Endod 2021 May 25;46(2):e18. Epub 2021 Feb 25.

Department of Operative Dentistry, Faculty of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.

Composite resins are the most commonly used dental restorative materials after minimally invasive dental procedures, and they offer an aesthetically pleasing appearance. An ideal composite restorative material should have wear properties similar to those of tooth tissues. Wear refers to the damaging, gradual loss or deformation of a material at solid surfaces. Read More

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Molecular assemblers: molecular machines performing chemical synthesis.

Rainer Herges

Chem Sci 2020 Jul 15;11(34):9048-9055. Epub 2020 Jul 15.

Otto-Diels-Institute of Organic Chemistry, Kiel University 24118 Kiel Germany

Molecular assemblers were proposed by K. Eric Drexler in 1986, based on the ideas of R. Feynman. Read More

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Chimeric oligosaccharide conjugate induces opsonic antibodies against serotypes 19A and 19F.

Chem Sci 2020 Jun 26;11(28):7401-7407. Epub 2020 Jun 26.

Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mūhlenberg 1 D-14424 Potsdam Germany

19A (ST19A) and 19F (ST19F) are among the prevalent serotypes causing pneumococcal disease worldwide even after introduction of a 13-valent pneumococcal conjugate vaccine (PCV13). Synthetic glycoconjugate vaccines have defined chemical structures rather than isolated polysaccharide mixtures utilized in marketed vaccines. Ideally, a minimal number of synthetic antigens would cover as many bacterial serotypes to lower cost of goods and minimize the response to carrier proteins. Read More

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Eye movements in real and simulated driving and navigation control - Foreword to the Special Issue.

J Eye Mov Res 2021 Jun 3;12(3). Epub 2021 Jun 3.

University of Tübingen, Tübingen, Germany.

The control of technological systems by human operators has been the object of study for many decades. The increasing complexity in the digital age has made the optimization of the interaction between system and human operator particularly necessary. In the present thematic issue, ten exemplary articles are presented, ranging from observational field studies to experimental work in highly complex navigation simulators. Read More

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The Optimal Ambient Conditions for World Record and World Class Performances at the Berlin Marathon.

Front Physiol 2021 28;12:654860. Epub 2021 May 28.

Institute of Primary Care, University Hospital Zürich, Zürich, Switzerland.

The "Berlin Marathon" is the fastest marathon racecourse in the world and has witnessed 11 world records (WRs; eight in men and three in women). Weather conditions can have an important impact on race time and we therefore examined the influence of environmental conditions (i.e. Read More

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Natural plant species inventory of hotspot areas in Arabian Peninsula: Southwest Al-Baha region, Saudi Arabia.

Saudi J Biol Sci 2021 Jun 4;28(6):3309-3324. Epub 2021 Mar 4.

Department of Biology, College of Sciences and Art, Albaha University, Qilwah, Saudi Arabia.

Plant hotspot areas are the areas that are very rich in plant species diversity. These areas have a priority for conservation. To highlight the plant diversity for nature conservation purposes a case study in Al Baha region, Saudi Arabia is presented, in which the importance of the natural vegetation and flora of one of the hotspot areas of Saudi Arabia is evaluated through the explanation of its natural plant species. Read More

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Non-adherence and sub-optimal treatment with asthma medications in young adults: a population-based cohort study.

J Asthma 2021 Jun 13:1-12. Epub 2021 Jun 13.

Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden.

Pharmacological treatment plays a key role in the management of asthma, but medication adherence is generally low. Our aim was to assess factors associated with dispensing patterns of, and adherence to, asthma medication in young adults with asthma.The study included young adults (age 22-24 years) from the Swedish population-based birth cohort BAMSE (n = 3,064) with linkage to register data on dispensed asthma medications and recorded diagnosis. Read More

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