LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 128

Search options

  1. Article: The Relationship Between Face Mask Use and Face-Touching Frequency in Public Areas: Naturalistic Study.

    Niesen, Sydney / Ramon, Daniel / Spencer-Hwang, Rhonda / Sinclair, Ryan

    Interactive journal of medical research

    2023  Volume 12, Page(s) e43308

    Abstract: Background: Throughout the COVID-19 pandemic in the United States, a major public health goal has been reducing the spread of the virus, with particular emphasis on reducing transmission from person to person. Frequent face touching can transmit viral ... ...

    Abstract Background: Throughout the COVID-19 pandemic in the United States, a major public health goal has been reducing the spread of the virus, with particular emphasis on reducing transmission from person to person. Frequent face touching can transmit viral particles from one infected person and subsequently infect others in a public area. This raises an important concern about the use of face masks and their relationship with face-touching behaviors. One concern discussed during the pandemic is that wearing a mask, and different types of masks, could increase face touching because there is a need to remove the mask to smoke, drink, eat, etc. To date, there have been few studies that have assessed this relationship between mask wearing and the frequency of face touching relative to face-touching behaviors.
    Objective: This study aimed to compare the frequency of face touching in people wearing a mask versus not wearing a mask in high-foot traffic urban outdoor areas. The purpose of this study was to assess if mask wearing was associated with increased face touching.
    Methods: Public webcam videos from 4 different cities in New York, New Jersey, Louisiana, and Florida were used to collect data. Face touches were recorded as pedestrians passed under the webcam. Adult pedestrians wearing masks were compared to those not wearing masks. Quantitative measures of frequency, duration, site of touch, and oral activities were recorded. Linear regression analysis was used to assess the association between mask use and face touching.
    Results: Of the 490 observed subjects, 241 (49.2%) were wearing a mask properly and 249 (50.8%) were not. In the unmasked group, 33.7% (84/249) were wearing it improperly, covering the mouth only. Face touching occurred in 11.4% (56/490) of the masked group and 17.6% (88/490) in the unmasked group. Of those who touched their face, 61.1% (88/144) of people were not wearing a mask. The most common site of face touching was the perioral region in both groups. Both the masked and unmasked group had a frequency of face touching for 0.03 touches/s. Oral activities such as eating or smoking increased face touching in the unmasked group.
    Conclusions: Contrary to expectations, non-mask-wearing subjects touched their face more frequently than those who were wearing a mask. This finding is substantial because wearing a face mask had a negative association with face touching. When wearing a mask, individuals are less likely to be spreading and ingesting viral particles. Therefore, wearing a mask is more effective in preventing the spread of viral particles.
    Language English
    Publishing date 2023-05-29
    Publishing country Canada
    Document type Journal Article
    ZDB-ID 2697014-4
    ISSN 1929-073X
    ISSN 1929-073X
    DOI 10.2196/43308
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Assessments of HLA-I Specificities of Anti-HLA-I Monoclonal Antibodies Using Solid Phase Bead Arrays.

    Zaitouna, Anita J / Ramon, Daniel S / Raghavan, Malini

    Bio-protocol

    2020  Volume 10, Issue 12, Page(s) e3655

    Abstract: Human leukocyte antigen class I (HLA-I) molecules are a group of structurally-related cell surface proteins with a high degree of variability within the population. While only up to six variants are expressed in an individual person, the whole population ...

    Abstract Human leukocyte antigen class I (HLA-I) molecules are a group of structurally-related cell surface proteins with a high degree of variability within the population. While only up to six variants are expressed in an individual person, the whole population contains thousands of different variants. The ability to distinguish specific variants is important in the clinic to determine compatibility during organ and bone marrow transplantation and in the laboratory to study the biological properties of individual variants. Solid phase bead arrays contain purified, individually identifiable HLA-I molecules that can be used to determine antibody specificity for individual HLA-I proteins. This method is high-throughput, highly specific, and allows for simultaneous screening of antibodies against multiple HLA-I allotypes. The beads are particularly useful for screening patient sera for the presence of donor-specific antibodies against individual HLA-I variants (which can arise during pregnancy, blood transfusion, or organ transplantation). Alternate approaches, such as the use of individual HLA-I-expressing cell lines, are more time consuming, and such cell lines are difficult to procure and standardize. The HLA-I beads are also useful to study HLA-I specificity and selectivity for other receptors and binding partners.
    Language English
    Publishing date 2020-06-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2833269-6
    ISSN 2331-8325 ; 2331-8325
    ISSN (online) 2331-8325
    ISSN 2331-8325
    DOI 10.21769/BioProtoc.3655
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Avances en biotecnología de alimentos

    Ramón, Daniel

    Arbor: Ciencia, Pensamiento y Cultura, Vol 190, Iss 768, p a

    2014  Volume 151

    Abstract: For thousands of years man has been applying genetics to improve both foodstuffs and food products. Using selective breeding and/or spontaneous mutations, a large number of plant varieties, animal breeds and microbial strains have been produced. In fact, ...

    Abstract For thousands of years man has been applying genetics to improve both foodstuffs and food products. Using selective breeding and/or spontaneous mutations, a large number of plant varieties, animal breeds and microbial strains have been produced. In fact, food biotechnology is the oldest form of biotechnology. Recently, recombinant DNA techniques have been applied in food technology, creating so-called ‘genetically modified foods’ (GM foods). Examples include transgenic potatoes able to act as an oral vaccine against cholera, recombinant wine yeasts that produce wine with a fruitier bouquet, and transgenic cows or ewes producing milk with high levels of pharmaceutical proteins. However, the starting date for the future of food biotechnology was the publication in 2001 of the first draft of the human genome. This paved the way for the search for the genes that are activated or deactivated in response to specifics nutrients. It is now also possible to determine the genetic differences underlying individuals’ different nutritional responses. Furthermore, every day more genomes of animals, plants or microorganisms that are common components of our diet like rice, bread yeast, the probiotic bacterium Bifidobacterium bifidum or pathogens responsible for food poisoning, like Escherichia coli, are published. This provides information about key genes, making it possible to devise strategies for improvement using classical and genetic engineering techniques, demarcate defence mechanisms to combat pathogenicity, and define new physiological functions. Biotechnology’s applications in food and nutrition are more advanced than many people imagine. Durante miles de años el hombre ha estado usando la genética para lograr la mejora de las materias primas y productos alimenticios terminados. Mediante el uso del cruce sexual y la aparición de mutantes espontáneos se ha generado un gran número de variedades vegetales, razas animales y cepas microbianas. De hecho, la biotecnología de los alimentos es la más antigua de todas las biotecnologías. Recientemente, las técnicas de ADN recombinante se han aplicado en la tecnología de alimentos creando los llamados alimentos modificados genéticamente o alimentos transgénicos. Ejemplos de este tipo de productos son unas patatas transgénicas que funcionan como una vacuna oral contra el cólera, unas levaduras vínicas transgénicas capaces de producir vino con aroma más afrutado o vacas u ovejas que producen leche con altos niveles de proteínas terapéuticas. En cualquier caso, la fecha de partida para el futuro de la biotecnología de los alimentos fue la publicación en 2001 del primer borrador del genoma humano: este descubrimiento abrió la puerta a la búsqueda de genes de nuestro genoma que se activan o desactivan en respuesta a la ingesta de nutrientes específicos. No solo eso, hoy en día también es posible determinar las diferencias genéticas entre individuos que producen diferentes respuestas nutricionales. Además cada día se publican en las bases de datos varios nuevos genomas de animales, plantas o microorganismos que son componentes habituales de nuestra dieta. Algunos casos sobresalientes son los genomas del arroz, la levadura del pan, la bacteria probiótica Bifidobacterium bifidum o patógenos responsables de la intoxicación alimentaria, como Escherichia coli . Estos datos proporcionan información sobre genes clave, con la que es posible diseñar estrategias de mejora por genética clásica o ingeniería clásica, delimitar los mecanismos de defensa para combatir la patogenicidad o definir nuevas funciones fisiológicas. Su aplicación a la alimentación y la nutrición está mucho más próxima de lo que muchos imaginan.
    Keywords Genetically modified food ; food biotechnology ; genetic engineering ; nutrigenetics ; nutrigenomics ; environmental risk assessment ; food safety ; Alimento modificado genéticamente ; biotecnología de alimentos ; ingeniería genética ; nutrigenética ; nutrigenómica ; riesgo ambiental ; seguridad alimentaria ; Social sciences (General) ; H1-99 ; Social Sciences ; H ; Science (General) ; Q1-390 ; Science ; Q ; General Works ; A
    Language English
    Publishing date 2014-08-01T00:00:00Z
    Publisher Consejo Superior de Investigaciones Científicas
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  4. Article ; Online: Technical and clinical aspects of the histocompatibility crossmatch assay in solid organ transplantation

    Arrunátegui, Ana María / Ramón, Daniel S / Viola, Luz Marina / Olsen, Linda G / Jaramillo, Andrés

    Biomedica : revista del Instituto Nacional de Salud

    2022  Volume 42, Issue 2, Page(s) 391–413

    Title translation Aspectos técnicos y clínicos de la prueba cruzada de histocompatibilidad en el trasplante de órganos sólidos
    Language Spanish
    Publishing date 2022-06-01
    Publishing country Colombia
    Document type English Abstract ; Journal Article
    ZDB-ID 2059952-3
    ISSN 2590-7379 ; 2590-7379
    ISSN (online) 2590-7379
    ISSN 2590-7379
    DOI 10.7705/biomedica.6255
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Bifidobacterium animalis

    Balaguer, Ferran / Barrena, Marta / Enrique, María / Maicas, Miren / Álvarez, Beatriz / Tortajada, Marta / Chenoll, Empar / Ramón, Daniel / Martorell, Patricia

    Antioxidants (Basel, Switzerland)

    2023  Volume 12, Issue 12

    Abstract: Life expectancy has increased globally in recent decades, driving interest in maintaining a healthy life that includes preservation of physical and mental abilities, particularly in elderly people. The gut microbiome becomes increasingly perturbed with ... ...

    Abstract Life expectancy has increased globally in recent decades, driving interest in maintaining a healthy life that includes preservation of physical and mental abilities, particularly in elderly people. The gut microbiome becomes increasingly perturbed with aging so the use of probiotics can be a strategy for maintaining a balanced gut microbiome. A previous report showed that
    Language English
    Publishing date 2023-12-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704216-9
    ISSN 2076-3921
    ISSN 2076-3921
    DOI 10.3390/antiox12122107
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Study of Unpicked Grapes Valorization: A Natural Source of Polyphenolic Compounds and Evaluation of Their Antioxidant Capacity

    Elejalde, Edurne / Villarán, María Carmen / Lopez-de-Armentia, Iratxe / Ramón, Daniel / Murillo, Raquel / Alonso, Rosa María

    Resources. 2022 Mar. 21, v. 11, no. 3

    2022  

    Abstract: Every year great amounts of high-quality wine grapes are left on the vine unpicked, and consequently lost, to control the overproduction in wine areas with limited appellation production yield. In the context of circular bioeconomy, the valorization of ... ...

    Abstract Every year great amounts of high-quality wine grapes are left on the vine unpicked, and consequently lost, to control the overproduction in wine areas with limited appellation production yield. In the context of circular bioeconomy, the valorization of these grapes as a potential source of natural antioxidants is of great interest. The study carried out is focused on the polyphenolic profile characterization of different unpicked grape varieties using the ultrasound-assisted extraction technique to extract the polyphenolic fractions. Moreover, the evaluation of the antioxidant capacity by several assays was carried out: oxygen radical absorbance capacity (ORAC), stability of 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), ferric reducing antioxidant capacity (FRAP), cupric reducing antioxidant capacity (CUPRAC) and stability of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical (ABTS) assays. The results showed a strong relationship between total phenolic content and hydroxycinnamic acids (R² = 0.9088) followed by flavan-3-ols (R² = 0.8792) and tannins (R² = 0.7705). The antioxidant capacity of the grapes was dependent on the total phenolic content. These results supply new information for a better understanding of the importance of giving an added value to the unpicked grapes due to their high content of polyphenols. These findings help the wine sector to consider the valorization of the unpicked grapes, classified as wastes, as an interesting source of natural antioxidants to be used as food supplements and with potential applications in the pharmaceutical industry.
    Keywords 2,2-diphenyl-1-picrylhydrazyl ; bioeconomics ; flavanols ; oxygen radical absorbance capacity ; pharmaceutical industry ; polyphenols ; ultrasonic treatment ; vines ; wines
    Language English
    Dates of publication 2022-0321
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2682482-6
    ISSN 2079-9276
    ISSN 2079-9276
    DOI 10.3390/resources11030033
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article ; Online: Can we risk transplantation across positive complement-dependent cytotoxicity crossmatches in pediatric patients?

    Pajaro, Octavio E / Ramon, Daniel S / Jaramillo, Andrés

    American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons

    2018  Volume 18, Issue 9, Page(s) 2107–2108

    MeSH term(s) Antilymphocyte Serum ; Child ; Heart Transplantation ; Humans ; Incidence ; Tissue Donors
    Chemical Substances Antilymphocyte Serum
    Language English
    Publishing date 2018-07-30
    Publishing country United States
    Document type Editorial ; Comment
    ZDB-ID 2060594-8
    ISSN 1600-6143 ; 1600-6135
    ISSN (online) 1600-6143
    ISSN 1600-6135
    DOI 10.1111/ajt.14986
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Technical Aspects of Crossmatching in Transplantation.

    Jaramillo, Andrés / Ramon, Daniel S / Stoll, Scott T

    Clinics in laboratory medicine

    2018  Volume 38, Issue 4, Page(s) 579–593

    Abstract: The presence of antibodies directed against HLA molecules expressed on the donor's cells is one the most important risk factor for serious clinical complications after transplantation. The lymphocyte crossmatch is one of the most important tests ... ...

    Abstract The presence of antibodies directed against HLA molecules expressed on the donor's cells is one the most important risk factor for serious clinical complications after transplantation. The lymphocyte crossmatch is one of the most important tests available to the laboratory as this assay detects the presence of donor-specific anti-HLA antibodies in potential allograft recipients. Early crossmatch methods used a complement-dependent cytotoxicity test, which was useful for detecting anti-HLA antibodies responsible for hyperacute graft rejection but lacked adequate sensitivity and specificity. Consequently, more sensitive and specific crossmatch methods were developed ultimately leading to the flow cytometry crossmatch as the preferred methodology.
    MeSH term(s) Flow Cytometry ; Histocompatibility Testing ; Humans ; Lymphocytes/immunology ; Transplantation ; Transplants/immunology
    Language English
    Publishing date 2018-10-05
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 604580-7
    ISSN 1557-9832 ; 0272-2712
    ISSN (online) 1557-9832
    ISSN 0272-2712
    DOI 10.1016/j.cll.2018.07.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Probiotics in transition: novel strategies.

    Gosálbez, Luis / Ramón, Daniel

    Trends in biotechnology

    2015  Volume 33, Issue 4, Page(s) 195–196

    Abstract: Regulations regarding health claims made for probiotics demand their proven effectiveness and limit the array of microbial species regarded as safe for live consumption. Novel strategies such as moving to postbiotics and genetically modified probiotics ... ...

    Abstract Regulations regarding health claims made for probiotics demand their proven effectiveness and limit the array of microbial species regarded as safe for live consumption. Novel strategies such as moving to postbiotics and genetically modified probiotics may be necessary to increase the effectiveness of microbial products.
    MeSH term(s) Humans ; Microbiota ; Probiotics
    Language English
    Publishing date 2015-04
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 47474-5
    ISSN 1879-3096 ; 0167-7799
    ISSN (online) 1879-3096
    ISSN 0167-7799
    DOI 10.1016/j.tibtech.2015.01.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Effects of a Novel Infant Formula on the Fecal Microbiota in the First Six Months of Life: The INNOVA 2020 Study.

    Ruiz-Ojeda, Francisco Javier / Plaza-Diaz, Julio / Morales, Javier / Álvarez-Calatayud, Guillermo / Climent, Eric / Silva, Ángela / Martinez-Blanch, Juan F / Enrique, María / Tortajada, Marta / Ramon, Daniel / Alvarez, Beatriz / Chenoll, Empar / Gil, Ángel

    International journal of molecular sciences

    2023  Volume 24, Issue 3

    Abstract: Exclusive breastfeeding is highly recommended for infants for at least the first six months of life. However, for some mothers, it may be difficult or even impossible to do so. This can lead to disturbances in the gut microbiota, which in turn may be ... ...

    Abstract Exclusive breastfeeding is highly recommended for infants for at least the first six months of life. However, for some mothers, it may be difficult or even impossible to do so. This can lead to disturbances in the gut microbiota, which in turn may be related to a higher incidence of acute infectious diseases. Here, we aimed to evaluate whether a novel starting formula versus a standard formula provides a gut microbiota composition more similar to that of breastfed infants in the first 6 months of life. Two hundred and ten infants (70/group) were enrolled in the study and completed the intervention until 12 months of age. For the intervention period, infants were divided into three groups: Group 1 received formula 1 (INN) with a lower amount of protein, a proportion of casein to whey protein ratio of about 70/30 by increasing the content of α-lactalbumin, and with double the amount of docosahexaenoic acid/arachidonic acid than the standard formula; INN also contained a thermally inactivated postbiotic (
    MeSH term(s) Female ; Humans ; Infant ; Infant, Newborn ; Bifidobacterium animalis ; Breast Feeding ; Feces/microbiology ; Infant Formula/chemistry ; Infant Formula/microbiology ; Gastrointestinal Microbiome
    Language English
    Publishing date 2023-02-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24033034
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top