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https://www.readbyqxmd.com/read/29436177/graphene-doped-electrochemical-copolymer-coating-of-2-2-bithiophene-and-3-methylthiophene-for-the-highly-effective-solid-phase-microextraction-of-volatile-benzene-homologues
#1
Xiafei Guo, Faqiong Zhao, Baizhao Zeng
We report the electrochemical fabrication of a poly(2,2-bithiophene-co-3-methylthiophene)-graphene composite coating and its application in the headspace solid-phase microextraction and gas chromatography determination of benzenes (i.e., bromobenzene, 4-bromotoluene, 2-nitrotoluene, 3-nitrotoluene, 1,2,4-trichlorobenzene). The coating was uniform and showed cauliflower-like microstructure. It had high thermal stability (up to 375°C) and could be used for at least 180 times of solid-phase microextraction without a decrease of extraction performance...
February 13, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29408551/dual-dye-in-vivo-imaging-of-differentially-charged-plga-carriers-reveals-antigen-depot-effect-leading-to-improved-immune-responses-in-preclinical-models
#2
Markus Riehl, Meike Harms, Henrike Lucas, Thomas Ebensen, Carlos A Guzmán, Karsten Mäder
The present in-vivo study investigated the behavior and performance of differently charged poly(lactic‑co‑glycolic) acid microparticles (PLGA MP) as vaccination platform. For this purpose, particles loaded with Ovalbumin (OVA) as model antigen were subcutaneously (s.c.) injected in SKH1 mice. The utilized SKH1 hairless mice exhibit a fully operative immune system and allow parallel imaging investigations due to the lack of hair. Usage of this species enabled the combination of two investigations within a single study protocol, namely noninvasive in-vivo imaging and immune responses directed towards the antigen...
February 2, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29403185/standardization-of-smp-procedure-and-its-impact-on-outcome
#3
Rachita S Dhurat, Sujit J S Shanshanwal, Ameet L Dandale
Background: Cosmetic deformities can result from various types of alopecia or even post hair transplantation procedures. Patients with such deformities seek aesthetically appealing longer-lasting options. Scalp concealers are commonly used by men and women to camouflage these deformities. Scalp micropigmentation (SMP) is one of the concealers recently gaining popularity. Objectives: SMP is a novel technique wherein microdot tattoos are placed in a stippling pattern to mimic hair follicles that are cut close to the scalp and various variables affecting its outcome were evaluated...
July 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/29392864/an-efficient-method-for-eccrine-gland-isolation-from-human-scalp
#4
F Jimenez, M Alam, I Hernandez, E Poblet, J A Hardman, R Paus
We describe a simple and efficient method to isolate eccrine sweat glands from the human scalp. This method is inspired by the hair graft harvesting method used in hair transplantation. Based on the recently described anatomical relationship between the scalp hair follicle and the eccrine gland, we have found that scalp follicular unit grafts are an excellent eccrine gland isolation source, especially for the coiled component. In order to make the gland visible for stereoscopic microdissection, the follicular units need to be previously stained with a vital dye like Methylene Blue or Neutral Red...
February 2, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29392051/dyspnea-associated-with-henna-stone-a-rare-cause-of-pediatric-tracheotomy
#5
Selis Gülseven Güven
Tracheotomy is one of the oldest surgical procedures, and it is a life-saving procedure to overcome upper airway obstructions. While congenital causes play an important role in pediatric tracheotomy indications, upper airway edema and obstruction due to anaphylaxis rarely require tracheotomy. Allergy can cause life-threatening acute edema by anaphylactic reactions in the respiratory tract. Henna stone is the material for dyeing hair with henna and making a temporary tattoo. It contains high proportions of paraphenylendiamine...
March 2017: Turkish Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/29374694/does-the-use-of-hair-dyes-increase-the-risk-of-developing-breast-cancer-a-meta-analysis-and-review-of-the-literature
#6
Ritika Gera, Ramia Mokbel, Ivanna Igor, Kefah Mokbel
BACKGROUND/AIM: Hair dye may contain mutagenic compounds which could be associated with an increased incidence of breast cancer in women who use it. The aim of this study was to examine the association between the personal use of hair dyes and the risk of breast cancer. MATERIALS AND METHODS: We conducted a literature review of epidemiological studies reporting breast cancer-specific risks among hair dye users versus non-users. The data for the incidence of breast cancer following the 'ever' use of hair dye in studies which met the inclusion criteria was analysed using a meta-analysis...
February 2018: Anticancer Research
https://www.readbyqxmd.com/read/29361043/keratin-hydrolysis-by-dermatophytes
#7
Derry K Mercer, Colin S Stewart
Dermatophytes are the most common cause of superficial fungal infections (tinea infections) and are a specialized group of filamentous fungi capable of infecting and degrading keratinised tissues, including skin, hair, and nail. Essential to their pathogenicity and virulence is the production of a broad spectrum of proteolytic enzymes and other key proteins involved in keratin biodegradation and utilization of its breakdown products. The initial stage of biodegradation of native keratin is considered to be sulfitolysis, in which the extensive disulfide bridges present in keratin are hydrolyzed, although some secreted subtilisins can degrade dye-impregnated keratin azure without prior reduction (Sub3 and Sub4)...
January 17, 2018: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29322532/factors-associated-with-p-phenylenediamine-sensitization-data-from-the-information-network-of-departments-of-dermatology-2008-2013
#8
Steffen Schubert, Holger Lessmann, Axel Schnuch, Wolfgang Uter, Johannes Geier
BACKGROUND: Risk factors for p-phenylenediamine (PPD) sensitization include the use of hair dyes, the application of temporary black henna tattoos, working as a hairdresser, and, possibly, exposure to hair dye pretests. OBJECTIVES: To quantify the impact of these (putative) risk factors on PPD sensitization. METHODS: Six items related to PPD exposure were added to the routine Information Network of Departments of Dermatology questionnaire from 2008 to 2013...
January 11, 2018: Contact Dermatitis
https://www.readbyqxmd.com/read/29316174/protective-effect-of-conditioner-agents-on-hair-treated-with-oxidative-hair-dye
#9
Robson M da Gama, Simone A França-Stefoni, Tânia C Sá-Dias, Valcinir Bedin, André R Baby, Maria Valéria R Velasco
BACKGROUND: Hair coloring is broadly used by women and men either to change their natural hair color or to delay the onset of gray hair. Oxidative dyes may damage the hair, as chemical and physical processes are required to convert the fiber structure and, consequently, alterations in its mechanical and surface properties. OBJECTIVES: The aim of this study was to evaluate the protective effect of silanetriol (and) Panthenol, PEG-12 dimethicone, and hydrolyzed silk (and) hydrolyzed milk protein (and) lactose as conditioner agents on hair treated with oxidative hair dye by protein loss, combability, and breaking strength...
January 7, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29301538/hair-product-use-age-at-menarche-and-mammographic-breast-density-in-multiethnic-urban-women
#10
Jasmine A McDonald, Parisa Tehranifar, Julie D Flom, Mary Beth Terry, Tamarra James-Todd
BACKGROUND: Select hair products contain endocrine disrupting chemicals (EDCs) that may affect breast cancer risk. We hypothesize that, if EDCs are related to breast cancer risk, then they may also affect two important breast cancer risk factors: age at menarche and mammographic breast density. METHODS: In two urban female cohorts (N = 248): 1) the New York site of the National Collaborative Perinatal Project and 2) the New York City Multiethnic Breast Cancer Project, we measured childhood and adult use of hair oils, lotions, leave-in conditioners, root stimulators, perms/relaxers, and hair dyes using the same validated questionnaire...
January 4, 2018: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29273420/allergens-of-permanent-hair-dyes-induces-epidermal-damage-skin-barrier-loss-and-il-1-%C3%AE-increase-in-epidermal-in-vitro-model
#11
Thalita Boldrin Zanoni, Tatiana Nascimento Pedrosa, Carolina Motter Catarino, Sander W Spiekstra, Danielle Palma de Oliveira, Gertjan Den Hartog, Aalt Bast, Geja Hagemann, Susan Gibbs, Silvia Berlanga de Moraes Barros, Silvya Stuchi Maria-Engler
Allergic and irritant skin reactions caused by topical exposure to permanent hair dyes are a common problem. For regulatory and ethnical purposes, it is required to perform chemical safety assessment following the replacement, reduction, and refinement of animal testing (3Rs). Permanent hair dyes are formed by a mixture of ingredients that vary from low to extreme skin sensitizing potency and that inter-react to form unknown by-products. Because of the complex reaction, this cytotoxic mechanism has not yet been elucidated and is the subject of this study...
December 19, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29222402/elmod1-stimulates-arf6-gtp-hydrolysis-to-stabilize-apical-structures-in-developing-vestibular-hair-cells
#12
Jocelyn F Krey, Rachel A Dumont, Philip A Wilmarth, Larry L David, Kenneth R Johnson, Peter G Barr-Gillespie
Sensory hair cells require control of physical properties of their apical plasma membranes for normal development and function. Members of the ARF small GTPase family regulate membrane trafficking and cytoskeletal assembly in many cells. We identified ELMOD1, a guanine nucleoside triphosphatase activating protein (GAP) for ARF6, as the most highly enriched ARF regulator in hair cells. To characterize ELMOD1 control of trafficking, we analyzed mice of both sexes from a strain lacking functional ELMOD1 (roundabout; rda)...
December 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29181098/characterization-of-hair-follicle-side-population-cells-in-mouse-epidermis-and-skin-tumors
#13
Sun Hye Kim, Christopher Sistrunk, Paula L Miliani de Marval, Marcelo L Rodriguez-Puebla
A subset of cells, termed side-population (SP), which have the ability to efflux Hoeschst 33342, have previously been demonstrated to act as a potential method to isolate stem cells. Numerous stem/progenitor cells have been localized in different regions of the mouse hair follicle (HF). The present study identified a SP in the mouse HF expressing the ABCG2 transporter and MTS24 surface marker. These cells are restricted to the upper isthmus of the HF and have previously been described as progenitor cells. Consistent with their SP characteristic, they demonstrated elevated expression of ABCG2 transporter, which participates in the dye efflux...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29154796/treatment-of-cancer-by-low-intensity-laser-radiation-therapy
#14
REVIEW
Sahar E Abo-Neima
Cancer treatment is one of the main challenges that face the scientific centers all over the world. The cancer incidence percentage increases year after year. The most used treatment for cancer is chemotherapy which is an application of systemic cytotoxic drug inside the patient. There are two main problems in chemotherapy that the cytotoxic drug is given systematically and cannot be localized in the tumor region in most cases that lead to killing the cancer cells as well as normal cells; and that cause the chemotherapy side effects like anemia, decrease in all blood cells count and platelets, nausea, vomiting, diarrhea, hair and nails loss and may cause a kind of blood toxicity...
November 14, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/29115940/does-hair-dye-use-really-increase-the-risk-of-prostate-cancer
#15
Bang-Ping Jiann
Recently, Shu-Yu Tai et al. reported that personal hair dye use increased risk of prostate cancer with a dose-response effect. Although hair dyes were identified as carcinogenic in animals and increased risk of some cancers among hairdressers, the existing epidemiological data did not support that personal hair dye use increased risk of cancers, even for bladder cancer. Given that Tai et al.'s report of a potential hazard of personal hair dye use on risk of prostate cancer was particular, the methodology of the study was scrutinized and some flaws were found including the issue of external validity...
November 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29029920/mitigation-or-prevention-of-mild-hair-dye-contact-dermatitis-after-pretreatment-with-clobetasol-foam
#16
Jace Rickstrew, Ting Wang, Deede Liu, Anand Rajpara, Daniel J Aires
No abstract text is available yet for this article.
November 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28970593/occupations-and-the-risk-of-bladder-cancer-in-yazd-province-a-case-control-study
#17
Fatemeh Farzaneh, Amir Houshang Mehrparvar, Mohammad Hassan Lotfi
BACKGROUND: Bladder cancer is the most common cancer of the urinary tract, with known occupational causes. The most effective way to prevent occupational cancers of the urinary tract is to prevent exposure to known carcinogens. OBJECTIVE: To examine the relationship between occupation and the risk of bladder cancer. METHODS: This case-control study was performed on 200 patients with bladder cancer and 200 healthy individuals in Yazd. Data were collected using a researcher-made questionnaire and based on interviews with patients and controls...
October 2017: International Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28969253/patch-test-results-from-an-occupational-and-contact-dermatitis-clinic-in-a-tertiary-care-hospital-of-southern-india-a-retrospective-study
#18
Kumaravel Sadagopan, Deepa Kalappan, Nirmala Sivaprakasam, Vinoth
INTRODUCTION: Occupational contact dermatitis, accounting for 95% of cases of occupational dermatoses, is the most common occupational skin disease. AIM: To find out the various allergens in different occupational and environmental settings causing contact allergy, from our patients presented with contact dermatitis. MATERIALS AND METHODS: It was a retrospective study from the data in hospital outpatient register over one year period, which includes patients with age ranging from 11 years to 73 years...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28961320/self-testing-for-contact-allergy-to-hair-dyes%C3%A2-%C3%A2-a-5-year-follow-up-multicentre-study
#19
Ulrik F Friis, An Goosens, Ana Maria Giménez-Arnau, Carola Lidén, Elena Giménez-Arnau, Ian R White, Jose H Alfonso, Wolfgang Uter, Jeanne D Johansen
BACKGROUND: In 2011, a multicentre study was conducted in order to determine how hair dye manufacturers instructed consumers to perform a self-test prior to dyeing their hair, in order to identify individuals who are likely to react upon subsequent hair dyeing. A number of concerns were raised concerning the variability in instructions between products and producers, and the safety and validity of this tool. OBJECTIVES: To perform a 5-year follow-up study in order to determine whether manufacturers still recommend a self-test, and if so, whether the procedures have been changed...
September 29, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28946126/tryptophan-and-kynurenine-determination-in-human-hair-by-liquid-chromatography
#20
Michelli F Dario, Thamires Batello Freire, Claudinéia Aparecida Sales de Oliveira Pinto, María Segunda Aurora Prado, André R Baby, Maria Valéria R Velasco
Tryptophan, an amino acid found in hair proteinaceous structure is used as a marker of hair photodegradation. Also, protein loss caused by several chemical/physical treatments can be inferred by tryptophan quantification. Kynurenine is a photo-oxidation product of tryptophan, expected to be detected when hair is exposed mainly to UVB (290-320nm) radiation range. Tryptophan from hair is usually quantified directly as a solid or after alkaline hydrolysis, spectrofluorimetrically. However, these types of measure are not sufficiently specific and present several interfering substances...
October 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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