3,539 results match your criteria Vacuum Extraction


Simple approach for an electron extraction layer in an all-vacuum processed n-i-p perovskite solar cell.

Energy Adv 2022 May 16;1(5):252-257. Epub 2022 Mar 16.

Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático Jose Beltrán 2 Paterna 46980 Spain

Vacuum processing is considered to be a promising method allowing the scalable fabrication of perovskite solar cells (PSCs). In vacuum processed PSCs, the n-i-p structure employing organic charge transport layers is less common than the p-i-n structure due to limited options to achieve an efficient electron extraction layer (EEL) on indium tin oxide (ITO) with vacuum thermal evaporation. There are a number of specific applications where an n-i-p structure is required and therefore, it is of interest to have alternative solutions for the n-type contact in vacuum processed PSCs. Read More

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In Vitro Evaluation of the Antioxidant Activity and Chemopreventive Potential in Human Breast Cancer Cell Lines of the Standardized Extract Obtained from the Aerial Parts of Zigzag Clover ( L.).

Pharmaceuticals (Basel) 2022 Jun 2;15(6). Epub 2022 Jun 2.

Department of Pharmacology, Chair of Pharmacology and Biology, Faculty of Health Sciences, Medical University of Lublin, 20-093 Lublin, Poland.

The aboveground parts of L. (zigzag clover), a little-known representative of the family Fabaceae, collected during flowering in a wild stand (Sławin-Szerokie district, Lublin, Poland), were used in this study. Our previous investigations confirmed the higher content of phytoestrogenic isoflavones (especially biochanin A and formononetin derivatives) in compared to the closely related medicinal plant (red clover) and the involvement of these compounds in anti-osteoporotic effects in ovariectomized female rats. Read More

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Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction.

J Vis Exp 2022 Jun 1(184). Epub 2022 Jun 1.

Department of Molecular Biology and Biochemistry, University of California Irvine;

Volatile organic compounds (VOCs) from biological samples have unknown origins. VOCs may originate from the host or different organisms from within the host's microbial community. To disentangle the origin of microbial VOCs, volatile headspace analysis of bacterial mono- and co-cultures of Staphylococcus aureus, Pseudomonas aeruginosa, and Acinetobacter baumannii, and stable isotope probing in biological samples of feces, saliva, sewage, and sputum were performed. Read More

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Immunomodulatory effects of cyclotides isolated from Viola odorata in an experimental autoimmune encephalomyelitis animal model of multiple sclerosis.

Mult Scler Relat Disord 2022 Jun 10;64:103958. Epub 2022 Jun 10.

Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Pharmaceutics, Faculty of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran. Electronic address:

Background: Multiple sclerosis (MS) is a demyelinating disease of the central nervous system that causes chronic inflammation. Cyclotides are small plant proteins with a wide range of biological activity, making them a target for researchers to investigate. This study was conducted to investigate the possible effects of cyclotide-rich fractions from Viola odorata as an immunomodulatory agent in an experimental autoimmune encephalomyelitis (EAE) model of MS. Read More

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Evaluation of Untargeted Metabolomic Strategy for the Discovery of Biomarker of Breast Cancer.

Front Pharmacol 2022 30;13:894099. Epub 2022 May 30.

Experimental Center of Molecular and Cellular Biology, The Public Laboratory Platform, China Pharmaceutical University, Nanjing, China.

Discovery of disease biomarker based on untargeted metabolomics is informative for pathological mechanism studies and facilitates disease early diagnosis. Numerous of metabolomic strategies emerge due to different sample properties or experimental purposes, thus, methodological evaluation before sample analysis is essential and necessary. In this study, sample preparation, data processing procedure and metabolite identification strategy were assessed aiming at the discovery of biomarker of breast cancer. Read More

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Operative vaginal delivery: practice patterns and outcomes at a tertiary general hospital.

Singapore Med J 2022 06 16. Epub 2022 Jun 16.

Department of Obstetrics and Gynaecology, Singapore General Hospital, Singapore.

Introduction: There has been a global decrease in operative vaginal deliveries, with a marked shift towards the vacuum extractor. However, little is known about the trends in operative vaginal delivery in Singapore.

Methods: A retrospective study was conducted on all operative vaginal deliveries performed from 2012 to 2017 at Singapore General Hospital (SGH). Read More

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Methods of Betulin Extraction from Birch Bark.

Molecules 2022 Jun 5;27(11). Epub 2022 Jun 5.

Department of Chemistry and Chemical Technologies, NJSC Karaganda Technical University named after Abylkas Saginov, Karaganda 100027, Kazakhstan.

Betulin is the most popular of the known triterpenoids of the lupan series. It has valuable pharmacological properties. It exhibits antibacterial, antiviral, antitumor, hypolipidemic and other types of activity. Read More

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Lignocellulose Extraction from Sisal Fiber and Its Use in Green Emulsions: A Novel Method.

Polymers (Basel) 2022 Jun 5;14(11). Epub 2022 Jun 5.

Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.

Regenerated lignocellulose nanofibrils (RLCNFs) have recently piqued the interest of researchers due to their widespread availability and ease of extraction. After dewaxing, we treated sisal fiber with alkali, followed by heating and agitation, to obtain RLCNFs, which were then vacuum oven-dried. We used a variety of characterization techniques, including XRD, SEM, and FT-IR, to assess the effects of the alkali treatment on the sisal fiber. Read More

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Microbial Protocols for Spacecraft: 1. Effects of Surface Texture, Low Pressure, and UV Irradiation on Recovery of Microorganisms from Surfaces.

Astrobiology 2022 Jun 8. Epub 2022 Jun 8.

Department of Plant Pathology, University of Florida, Space Life Sciences Lab, Exploration Park, Merritt Island, Florida, USA.

Modeling risks for the forward contamination of planetary surfaces from endemic bioburdens on landed spacecraft requires precise data on the biocidal effects of space factors on microbial survival. Numerous studies have been published over the preceding 60 years on the survival of diverse microorganisms exposed to solar heating, solar ultraviolet (UV) irradiation, vacuum, ionizing radiation, desiccation, and many other planetary surface conditions. These data were generated with diverse protocols that can impair the interpretations of the results due to dynamic experimental errors inherent in all lab protocols. Read More

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Caesarean section, vaginal instrumental delivery and perineal morbidity in the Slovak Republic in the years 2007-2018.

Ceska Gynekol 2022 ;87(2):80-86

Objective: Analysis of caesarean section, vaginal instrumental deliveries and severe perineal morbidity in the Slovak Republic in the years 2007-2018.

Methods: The analysis of prospectively collected caesarean section and vaginal instrumental delivery data in the years 2007-2018, and episiotomies and severe perineal morbidity data in the years 2008-2018 from obstetrics hospitals in the Slovak Republic.

Results: Caesarean section rate progressively increased from 24. Read More

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Production of Recombinant Proteins by Agrobacterium-Mediated Transient Expression.

Methods Mol Biol 2022 ;2480:89-102

Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Aachen, Germany.

The agroinfiltration of plant tissue is a robust method that allows the rapid and transient expression of recombinant proteins. Using wild-type plants as biomass, agroinfiltration exploits the ability of plants to synthesize even complex multimeric proteins that require oxidative folding and/or post-translational modifications, while avoiding the expensive and time-consuming creation of stably transformed plant lines. Here we describe a generic method for the transient expression of recombinant proteins in Nicotiana benthamiana at the small to medium laboratory scale, including appropriate binary vectors, the design and cloning of expression constructs, the transformation, selection, and cultivation of recombinant Agrobacterium tumefaciens, the infiltration of plants using a syringe or vacuum device, and finally the extraction of recombinant proteins from plant tissues. Read More

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Maternal and Neonatal Morbidity After Attempted Operative Vaginal Delivery.

Obstet Gynecol 2022 May 5;139(5):833-845. Epub 2022 Apr 5.

Department of Obstetrics and Gynecology, Bordeaux University Hospital, Bordeaux, and the Clinical Research Center, Angers University Hospital, Angers, France.

Objective: To assess severe short-term maternal and neonatal morbidity and pelvic floor disorders at 6 months postpartum after attempted operative vaginal delivery according to the instrument used.

Methods: We conducted a prospective study of women with live, singleton, term fetuses in vertex presentation. Patients attempted operative vaginal delivery in a French tertiary care university hospital from December 2008 through October 2013. Read More

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Intrapartum ultrasound use in clinical practice as a predictor of delivery mode during prolonged second stage of labor.

Arch Gynecol Obstet 2022 May 16. Epub 2022 May 16.

Department of Obstetrics and Gynecology, Kaplan Medical Center, 76100, Rehovot, Israel.

Purpose: To determine the validity of intrapartum ultrasound (IPUS), and particularly the angle of progression (AOP), in predicting delivery mode when measured in real-life clinical practice among women with protracted second stages of labor.

Methods: Using electronic medical records, nulliparous women with a second stage of labor of ≥ 3 h ("prolonged") and a documented AOP measurement during the second stage were identified. The ability of a single AOP measurement in "prolonged" second stage to predict a vaginal delivery (VD) was assessed. Read More

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Optimization of Sensory Properties of Cold Brew Coffee Produced by Reduced Pressure Cycles and Its Physicochemical Characteristics.

Molecules 2022 May 6;27(9). Epub 2022 May 6.

Chemical Engineering Department, Laboratory of Food and Agricultural Industries Technologies, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.

The use of vacuum cycles for the cold extraction of coffee is a new process that leads to a significant reduction in process time of Cold Brew compared to conventional methods. This research aimed at specifying the necessary parameters for producing a consumer-accepted cold brew coffee by applying vacuum cycles. This was achieved by investigating the effect of the number of cycles and of the applied pressure (vacuum) on the physicochemical characteristics of the cold brew coffee, i. Read More

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Optimization of Astaxanthin Recovery in the Downstream Process of .

Foods 2022 May 6;11(9). Epub 2022 May 6.

ZAiT, Bio and Food Technology, Faculty Energy and Biotechnology, Flensburg University of Applied Sciences, 24943 Flensburg, Germany.

Astaxanthin derived from is a valuable metabolite applied in a wide range of products. Its extraction depends on a sophisticated series of downstream process steps, including harvesting, disruption, drying, and extraction, of which some are dependent on each other. To determine the processes that yield maximum astaxanthin recovery, bead milling, high-pressure homogenization, and no disruption of biomass were coupled with spray-drying, vacuum-drying, and freeze-drying in all possible combinations. Read More

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Electrospun Cellulosic Membranes toward Efficient Chiral Resolutions via Enantioselective Permeation.

ACS Macro Lett 2021 07 28;10(7):921-925. Epub 2021 Jun 28.

Université Grenoble Alpes, CNRS, CERMAV, Grenoble 38000, France.

Cellulose tris(3,5-dimethylphenylcarbamate) (CDMPC), known as one of the most versatile chiral selectors packed in columns for chiral chromatography, is electrospun for the first time. The electrospun nanofibers with a mean diameter of 329 nm form a self-standing nonwoven textile with a specific surface area of 5.6 m/g. Read More

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Anal incontinence after a prolonged second stage of labor in primiparous women.

Sci Rep 2022 05 5;12(1):7315. Epub 2022 May 5.

Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, Stockholm, Sweden.

The objective was to investigate the effect of delivery mode on anal incontinence 1-2 years after delivery in primiparous women with prolonged second stage of labor. This population-based cohort and questionnaire study performed in Stockholm Region, Sweden, included 1302 primiparous women with a second stage ≥ 3 h from December 1st, 2017 through November 30th, 2018. Background characteristics and outcome data were retrieved from computerized records. Read More

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13, 14-Epoxyoleanan-3-ol-acetate: A Male Fertility-Enhancing Constituent from Hexane Fraction of L. (Cucurbitaceae).

Turk J Pharm Sci 2022 Apr;19(2):180-186

University of Benin, Faculty of Pharmacy, Department of Pharmacognosy, Benin City, Nigeria.

Objectives: Male infertility has been associated with oxidative stress-induced and/or microbial induced in some men. The use of medicinal plants to overcome oxidative stress-induced infertility cannot be over emphasized. Hence, the aim of this research was to isolate the antilipid peroxidation (an index of usage for treating oxidative stress-induced male infertility) bioactive principle from using bioactivity-guided isolation. Read More

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Solid phase extraction based on trimethylsilyloxy silica aerogel.

RSC Adv 2021 May 24;11(30):18617-18622. Epub 2021 May 24.

The Water Research Center, The Hydro-Chemistry Laboratory, Porter School for Environment and Earth Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University Tel Aviv 69978 Israel

Solid-phase extraction (SPE) based on trimethylsilyloxy-modified silica aerogel was developed for extraction of chemotherapeutic drugs from water. The developed method is easy and affordable, can be performed in separating funnel and does not require a vacuum and SPE manifold. The extraction and recovery of cyclophosphamide (CYP), dexamethasone (DEX), and paclitaxel (TAX) by the aerogel from water were investigated. Read More

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Episiotomy in vacuum extraction, do we cut the levator ani muscle? A prospective cohort study.

Int Urogynecol J 2022 Apr 25. Epub 2022 Apr 25.

Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden.

Introduction And Hypothesis: Vaginal delivery may lead to levator ani muscle (LAM) injury or avulsion. Episiotomy may reduce obstetric anal sphincter injury in operative vaginal delivery, but may increase the risk of LAM injury. Our aim was to assess whether lateral episiotomy in vacuum extraction (VE) in primiparous women causes LAM injury. Read More

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Phytochemicals from fruit and vegetable waste generated in hotels: Optimization of recovery procedure and potential for value-addition.

Waste Manag 2022 May 19;144:401-410. Epub 2022 Apr 19.

The Energy and Resources Institute (TERI), Darbari Seth Block, IHC Complex, Lodhi Road, New Delhi 110003, India.

Fifteen star-category hotels in the National Capital Region of India were surveyed to assess the mixed fruit and vegetable waste generated. Based on the survey, a model mixed waste was prepared and used to identify the optimal procedure for recovery of bioactive phytochemicals and Trolox equivalent antioxidant capacity (TEAC) followed by preliminary identification of phytochemical constituents. The optimization procedure was done over (i) level I focusing on sample type (fresh, oven dried, vacuum dried), extraction technique (maceration, ultrasound assisted extraction), removal of interfering components by treatment with dichloromethane (DCM) and extraction in different solvents, and (ii) level II focusing on solvent concentration and extraction time, in both non DCM and DCM treated samples. Read More

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All-vacuum deposited perovskite solar cells with glycine modified NiO hole-transport layers.

RSC Adv 2022 Apr 7;12(18):10863-10869. Epub 2022 Apr 7.

State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing, Wuhan University of Technology 122 Luoshi Road Wuhan 430070 Hubei Province China

Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted enormous research attention due to their high efficiency and low cost. However, most of the PSCs with high efficiencies still need expensive organic materials as their hole-transport layer (HTL). Obviously, the highly expensive materials go against the low-cost concept of advanced PSCs. Read More

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Determination of Aniline in Soil by ASE/GC-MS.

Molecules 2022 Mar 24;27(7). Epub 2022 Mar 24.

Henan Provincial Coal Geological Survey and Research Institute, Zhengzhou 450052, China.

In this study, a rapid and simple method based on accelerated solvent extraction (ASE) combined with gas chromatography-mass spectrometry (GC-MS) was established to determine the levels of aniline in soil. The matrix spike recovery rates of aniline were investigated by changing several experimental parameters such as vacuum freeze-drying, accelerated solvent extraction, sample transfer, nitrogen-blowing concentration and solvent exchange. Under optimized pretreatment conditions, the linearity of the method ranged from 0. Read More

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Neonatal subpial hemorrhage along the medial side of the temporal lobe: Two case reports.

Radiol Case Rep 2022 Jun 4;17(6):1881-1886. Epub 2022 Apr 4.

Department of Diagnostic Radiology, Hyogo Prefectural Kobe Children's Hospital, Kobe, Hyogo, Japan.

Neonatal subpial hemorrhage has been underrecognized until recently and its pathophysiology remains unclear. Advances in magnetic resonance imaging have facilitated the identification of hemorrhage within the subpial space and cohort studies recently reported its imaging and clinical features. We encountered two cases of neonatal subpial hemorrhage along the medial side of the temporal lobe. Read More

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Respiratory symptoms and use of dust-control measures in New Zealand construction workers - A cross-sectional study.

PLoS One 2022 7;17(4):e0266668. Epub 2022 Apr 7.

Centre for Public Health Research, Massey University, Wellington, New Zealand.

Dust-exposed construction workers have an increased risk of respiratory symptoms, but the efficacy of dust-control measures remains unclear. This study compared respiratory symptoms, using a modified European Community Respiratory Health Survey questionnaire, between construction workers (n = 208) and a reference group of bus drivers and retail workers (n = 142). Within the construction workers, we assessed the effect of collective (on-tool vacuum/'wet-cut' systems) and personal (respirators) exposure controls on symptom prevalence. Read More

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Wound fluid sampling methods for proteomic studies: A scoping review.

Wound Repair Regen 2022 05 5;30(3):317-333. Epub 2022 Apr 5.

NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.

Understanding why some wounds are hard to heal is important for improving care and developing more effective treatments. The method of sample collection used is an integral step in the research process and thus may affect the results obtained. The primary objective of this study was to summarise and map the methods currently used to sample wound fluid for protein profiling and analysis. Read More

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Modifiable and non-modifiable risk factors for obstetric anal sphincter injury in a Norwegian Region: a case-control study.

BMC Pregnancy Childbirth 2022 Apr 1;22(1):277. Epub 2022 Apr 1.

Department of Pediatrics, Innlandet Hospital Trust, Anders Sandvigsgate, 2619, Lillehammer, Norway.

Background: Obstetric anal sphincter injury (OASI) is a common and severe complication of vaginal delivery and may have short- and long-term consequences, including anal incontinence, sexual dysfunction and reduced quality of life. The rate of OASI varies substantially between studies and national birth statistics, and a recent meta-analysis concluded that there is a need to identify unrecognized risk factors. Our aim was therefore to explore both potential modifiable and non-modifiable risk factors for OASI. Read More

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Patient Satisfaction With Informed Consent for Cesarean and Operative Vaginal Delivery.

J Obstet Gynaecol Can 2022 Mar 29. Epub 2022 Mar 29.

Department of Obstetrics & Gynaecology, Unity Health Toronto, St. Michael's Hospital, Toronto, ON.

Objective: To evaluate patient satisfaction with the informed consent process for elective cesarean delivery (CD), emergency CD, and operative vaginal delivery (OVD).

Methods: A cross-sectional, survey-based study was conducted among patients on the postpartum floor of our institution. Patients were approached after delivery to complete a previously pilot-tested questionnaire, based on validated literature. Read More

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Diagnostic assessment of traumatic brain injury by vacuum extraction in newborns: overview on forensic perspectives and proposal of operating procedures.

Front Biosci (Landmark Ed) 2022 03;27(3):79

Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Sapienza University of Rome, 00161 Rome, Italy.

Background: Traumatic brain injury (TBI) during birth constitutes one of the most relevant causes of mortality and morbidity in newborns worldwide. Although improvements in obstetrical management and better indications for caesarean section have led to a consistent decrease in the incidence of perinatal mechanical injury, vacuum extraction is still associated with a high complications rate leading to several forensic issues in the evaluation of healthcare professional management.

Methods: Vacuum-associated lesions may be topographically distinguished as extracranial or intracranial injuries. Read More

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Is sonographic measurement of head-perineum distance useful to predict obstetrical anal sphincter injury in case of vacuum delivery?

Int J Gynaecol Obstet 2022 Mar 8. Epub 2022 Mar 8.

Department of Gynecology and Obstetrics, Poissy-Saint Germain Hospital, Poissy, France.

Objective: Determine if head-perineum distance (HPD) measurement before vacuum extraction (VE) was predictive of an obstetric anal sphincter injury (OASIS) occurrence.

Methods: Retrospective, bicentric (Lille and Poissy, France) cohort study conducted from January 2019 to June 2020. All VE in singleton pregnancies of ≥34 weeks were included. Read More

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