2,377 research outputs found
Electrochemical Study of Antioxidant Regeneration Mechanisms – Application in Dermocosmetics.
Oxidative stress is associated to the massive generation of reactive oxygen species inducing fast oxidative reactions in chain. To overcome this problem, reasonable supplementations of antioxidants are widely practiced, mostly based on empirical protocols. An electrochemical process is proposed to choose the best molecules association inducing the greatest antioxidant capacity, by coupling homogeneous or heterogeneous catalytic reactions involving antioxidants with an electrochemical step. Cyclic voltammetry and constant potential electrolysis experiments were used to highlight regeneration reactions induced by specific associations of hydrophilic and lipophilic antioxidants in homogeneous medium or at liquid/liquid interface. Results showed that N-Acetyl-L-Cysteine (NAC) was effectively regenerated by both ascorbic acid (AA) and ascorbyl glucoside (AA-2G) but not by ascorbyl phosphate magnesium (AA-2P). The antioxidant properties of alpha-tocopherol also increased to 40% when associated with AA. The process was successfully applied for the first time to the study of simple emulsions. Formulations involving NAC and AA-2G presented the highest synergic effect, the antioxidant capacity being amplified by more than 35%. On the other hand no catalytic mechanism was observed when introducing three antioxidants in the cream because it induced too low reaction kinetics. This electrochemical process can thus be exploited as a tool for the optimisation of “anti-aging” dermocosmetic formulations
Quantum oscillations and upper critical magnetic field of the iron-based superconductor FeSe
Shubnikov-de Haas (SdH) oscillations and upper critical magnetic field
() of the iron-based superconductor FeSe ( = 8.6 K) have been
studied by tunnel diode oscillator-based measurements in magnetic fields of up
to 55 T and temperatures down to 1.6 K. Several Fourier components enter the
SdH oscillations spectrum with frequencies definitely smaller than predicted by
band structure calculations indicating band renormalization and reconstruction
of the Fermi surface at low temperature, in line with previous ARPES data. The
Werthamer-Helfand-Hohenberg model accounts for the temperature dependence of
for magnetic field applied both parallel (\textbf{H} ) and
perpendicular (\textbf{H} ) to the iron conducting plane, suggesting
that one band mainly controls the superconducting properties in magnetic fields
despite the multiband nature of the Fermi surface. Whereas Pauli pair breaking
is negligible for \textbf{H} , a Pauli paramagnetic contribution is
evidenced for \textbf{H} with Maki parameter = 2.1,
corresponding to Pauli field = 36.5
Le numérique pour tromper l’ennui au travail : usages affectifs des TIC par les jeunes adultes
International audienceNous présentons les résultats d’une étude exploratoire conduite auprès de jeunes en situation préprofessionnelle. Nous questionnons leur rapport aux outils numériques dans une perspective émotionnelle : ainsi, quels affects produit leur immersion dans les TIC ? L’hypothèse est que les étudiants cherchent à équilibrer les tensions émotionnelles nées de leurs activités sociales et professionnelles. Ces tensions sont également au cœur des stratégies des fournisseurs de service ainsi que des institutions pédagogiques
Social Skills Group For Adults Living With Asperger's Syndrome
This work presents the results obtained in a therapeutic
social skills group of adults living with Asperger's
Syndrome (ASD). The treatment consists in a regular
participation in specifically designed groups. Patients
meeting the criteria for ASD have been selected with no
psychiatric comorbidity and were thus able to optimal
group interaction. They were suffering significant anxiety
symptoms supposed to lead to inadequate social skills as
well as to result from them. Requisite participation
included ten sessions in group discussions of topics
propose by the patients themselves. Special attention was
accord to train the patients in detecting possible
functional analysis processes leading to increasing anxiety
and in training social skills. The paper concentrates in
three assessments by the patient themselves of four
different scales (anxiety, depression, self-esteem and
social skills in daily life) allowing to the comparison of
baseline level (before session 1) with short term
(immediately after the last session) and long term benefits
of training (3 months later). These different measures
revealed significant long term improvement in the
patients. These results are important because they consist
in training the patients in self-help. They might also
contribute to better understanding of the ASD by the
scientific community as well as by the patients
themselves. Finally, long term treatments such as
proposed here are more likely to extend the improvement
of the patients' well-being to their social environment,
family and professional one. It is thus both a clinical and a
theoretically relevant research effort
Psychotherapy for Adults with Autistic Spectrum Disorders
Objective: This is an unconventional manuscript that attempts to outline a theory of caetextia for adults with autistic
spectrum disorders (ASD), based on hemispheric dominance due to impaired parallel processing. To take context
into consideration, a person must be able to concentrate on and separate out his attention across different elements
of a given situation. This is a process of dynamic sensory integration. Yet the deficits and strategies developed by
these patients differ according to whether their dominant hemisphere is the right or the left one.
Method: By looking at two case studies for didactical purposes, we will attempt to interpret these differences and
construct a specific therapeutic approach.
Conclusions: The detection of this disability as well as the therapeutic approaches must thus be adapted to this
dimension of the disorder. We shall attempt to interpret the differences and design a specific therapeutic plan
CBT of a Person Living in a Situation of Mental Handicap and Presenting an Anxiety Disorder Coupled with a Specific Phobia
The prevalence of anxiety disorders within a population presenting an intellectual
deficiency is 43%. The integrated multimodal approach highlights different
predisposing risk factors: vulnerability and its consequences on adaptive behaviors
and deficits in the learning process; interactions with the environment. Negative
experiences and a weak perception of control lead to a higher failure expectation,
resulting in an increase in anxiety for the handicapped person. On the other hand,
environment, family and professionals may induce responses of dependency, fear
and avoidance, and consequently, a decrease of opportunities to develop social and
emotional skills. The cognitive-behavioral therapy was adapted to the patient. The
therapeutic alliance with the patient, as well as with his family and professionals,
was the keystone and the required condition for the therapy procedure.
The functional analysis underlined three therapeutic axes: 1) a work on the
physiological reactions of anxiety and the train phobia, using the reaction
management techniques
2) A work on cognitive restructuration.
3) A work on the behavior during exposure to the anxiety-inducing situation.
Simultaneously, the patient received an antidepressant and anti-anxiety
medication.
Other skills and techniques were used: eye tracking (ASL mobile) to point out
the patient resources; the psycho-educative approach using the "heart mat"
(cardiac coherence) as a mediator to share the understanding of the situation; a
motivational approach for the exposure planning; and the PEUR model, used in
group therapies to divide the therapy into sequences, thus fostering self-control.
Measurements at frequent and regular intervals have shown the rapid evolution
of the patient and the pertinence of the cognitive-behavioral approach during
therapies for persons living in a situation of mental handicap and presenting
concomitant mental disorders
Le numérique pour tromper l’ennui au travail : usages affectifs des TIC par les jeunes adultes
International audienceNous présentons les résultats d’une étude exploratoire conduite auprès de jeunes en situation préprofessionnelle. Nous questionnons leur rapport aux outils numériques dans une perspective émotionnelle : ainsi, quels affects produit leur immersion dans les TIC ? L’hypothèse est que les étudiants cherchent à équilibrer les tensions émotionnelles nées de leurs activités sociales et professionnelles. Ces tensions sont également au cœur des stratégies des fournisseurs de service ainsi que des institutions pédagogiques
Social Skills Group for Adults Living with Intellectual Disabilities
This work presents the results obtained with a therapeutic social skills group
for adults living with intellectual disabilities and psychiatric co-morbidities. The
concept of social skill is used in cognitive behavioral therapy approaches. For
the last four years in the community psychiatry unit within the department of
psychiatry of mental development, we have organized social skills groups. These
groups are meant for ambulatory patients with intellectual impairments and
psychiatric co-morbidities in conjunction with a lack of social skills. Each patient is
under individual cognitive behavioral therapy treatment, which makes it possible
to precisely evaluate the issues and the patient's expectations. In addition to
the individual sessions, the patients participate in a monthly semi-open selfaffirmation
group. Each patient completes a variety of questionnaires and scales
which serve as a baseline, as well as questionnaires at the end of each session to
provide information about the dynamic of the group and its progressio
Procédures de désambiguïsation pour les systèmes de recherche d’information
Nous discutons de la nécessité de tenir compte de la polysémie nominale pour les systèmes de recherche d’information qui tiennent compte du contenu des textes numérisés. Nous présentons un prototype qui fonctionne en identifiant les substantifs d’un texte donné et en stipulant les domaines qui leur sont rattachés afin de faire ressortir une dominante, et ainsi de procéder au typage du texte en termes de domaine. Ce prototype a pour principale particularité d’utiliser le système intex et de faire appel aux descriptions formalisées du français effectuées au Laboratoire de Linguistique Informatique implémentées sous forme de dictionnaires électroniques et de grammaires locales. Nous montrons comment intex, en s’appuyant sur ces dictionnaires et ces grammaires, peut lever des ambiguïtés relatives à des substantifs.We show how nouns ambiguity affects the quality of Information Extraction systems. We present the iris prototype, which identifies nouns in a text, associates each of them with one or more semantic domains, resolves domain ambiguities, and produces a resulting domain that characterizes the text. This prototype is built with intex, and uses the linguistic resources of the Laboratoire de Linguistique Informatique, implemented in the form of electronic dictionaries for classes of predicates and arguments, and local grammars. We show how intex can be used to integrate and process these resources, and how the resulting system can disambiguate nouns
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