TAILIEUCHUNG - LASER HAIR REMOVAL: SCIENTIFIC PRINCIPLES AND PRACTICALASPECTS

It is in order to conceptualise this bond that Kant proposes that aesthetic satisfaction must 'be regarded as grounded on what [one] can presuppose in every other person'. 3 It is what explains John Dewey's attempt to understand aesthetic experience on the basis of an experience. That is, rather than start by assuming the distinctiveness of aesthetic experience, Dewey does the exact opposite and emphasizes its commonality with experiences as mundane as 'that meal, that storm, that rupture of friendship'. . | LASER HAIR REMOVAL SCIENTIFIC PRINCIPLES AND PRACTICAL ASPECTS Christine C. Dierickx . Visiting Research Scientist Wellman Laboratories of Photomedicine Harvard Medical School ABSTRACT The use of lasers for hair removal has been studied for a number of years. In this procedure laser light is absorbed by melanin in the hair shaft damaging the follicular epithelium. A clinical study evaluated the use of the LightSheer Diode Laser for hair removal. Of 92 patients all had temporary hair loss and 89 had permanent hair reduction. Regrowing hairs were shown to be thinner and lighter than previously. Extensive clinical use of this high-power pulsed diode laser has resulted in recommendations for patient selection and proper use of the laser. Appropriate fluence settings have been shown to cause permanent hair reduction without damaging the epidermis regardless of skin type. BACKGROUND Laser hair removal focuses on the endogenous chromophore melanin which is mainly found in the hair shaft with a small amount present in the upper third of the follicular epithelium Figure 1 . When an appropriate energy source such as a laser is directed at the skin light is primarily absorbed in the hair shaft melanin. Heat is generated and diffuses to the surrounding follicular epithelium. A similar principle applies to laser treatment of vascular lesions where the heat generated after absorption by hemoglobin is transferred from the blood to the vascular endothelial cells. Shaft Sebaceous glands Bulge Root Bulb Follicle Matrix Papilla Arrector pili muscle Figure 1. The anatomy of a typical terminal hair. Laser hair removal targets the melanin in the hair shaft. Laser hair removal is based on the principles of selective photothermolysis a combination of the appropriate laser wavelength pulse duration and fluence. Wavelengths between approximately 700 and 1000 nanometers nm are selectively absorbed by melanin the competing chromophores oxyhemoglobin and water absorb less energy at these .

• Thời trang - Làm đẹp
• Immunodeficiency virus
• Several studies
• antiretroviral drugs
• significantly higher
• previous history
• Tuberculosis
• BMC Cancer
• Kaposi sarcoma
• Eyelid leads
• Human immunodeficiency virus
• Acquired immunodeficiency syndrome
• Journal of Zoology
• Feline immunodeficiency virus
• Feline leukemia virus
• Polymerase chain reaction
• Phylogenetic analysis
• Prionailurus bengalensis
• trình bày báo cáo
• tài liệu báo cáo khoa học
• báo cáo y học
• kiến thức y học
• nghiên cứu y học
• BMC Pediatrics
• Malaria and Human immunodeficiency virus
• Malarial treatment
• Immune system
• P
• falciparum malaria
• Protease cleavage site mutations
• P6gag motifs
• Human immunodeficiency virus type 1
• Protease cleavage
• PTAP motif duplications
• Human papillomavirus
• Multiple infection
• Papanicolaou test
• Efavirenz induced gynecomastia
• Antiretroviral treatment
• Prepubertal girl
• HIV exposed infants
• Prevention of Mother to Child Transmission
• Postnatal clinic
• Health care workers
• HIV positive status disclosure
• School aged children
• BMC Pulmonary Medicine
• Bronchial brushing
• Bacterial microbiome
• Gene expression
• The washington manual of medical therapeutics
• Sexually transmitted infections
• Solid organ transplant medicine
• Human immunodeficiency viruses
• Virus vaccines
• Anti viral drugs
• Bacterial viruses
• Emerging viruses
• Non Hodgkin’s Lymphoma
• Epstein Barr Virus
• Central nervous system
• Transfusion transmitted infections
• Hepatitis C Virus
• Hepatitis B Virus
• Tertiary care hospital
• Nuclear family
• Poor compliance
• Highly active antiretroviral therapy
• HIV exposed uninfected
• Acquired Immunodeficiency Syndrome
• Body mass index
• HIVunexposed uninfected
• bệnh AIDS
• virus Human immunodeficiency virus
• tĩnh mạch
• ô nhiễm
• tế bào lympho T
• sản sinh
• vi khuẩn
• báo cáo khoa học
• công trình nghiên cứu về y học
• tài liệu về y học
• cách trình bày báo cáo
• báo cáo hóa học
• công trình nghiên cứu về hóa học
• tài liệu về hóa học