엄격하게 규제한다.
총부유분진(TSP ; Total suspended Particles)
부유 분진 중에 입경이 10㎛이하의 입자는 침강속도가 작아 대기중에 장기간 체류해 호흡시 기도 및 폐도에 침착해 호흡기에 영향을 주는 것으로 특히 10㎛이하인 입자를 대상으로 한 부유 입자상 물질에 관계하는 환경기준은 다음과 같다.
The atmosphere shields us from the sun's cancer-causing ultraviolet (UV) radiation and also moderates the earth's climate.
The atmosphere is obviously vital for human existence, but we have nevertheless been polluting it for years.
The atmosphere is obviously vital for human existence, but we have nevertheless been polluting it for years.
The atmosphere can be divided vertically into four m
Histoplasmosis
Acquired by inhalation of dustparticles from contaminated soil
Markedly resemble Tbc
Macrophages are the major target of infection
Patients with acquired immunodeficiency syndrome are susceptible to disseminated infection with Histoplasma (opportunistic pathogen)
Diagnosis
Culture
Identification of the fungus in tissue lesions.
Serologic tests for antibodies and antigen.
4. Equipment
4.1 RCA cleaning
RCA cleaning is a series of rinsing procedure prior to experiment with Si wafer. The purpose of the RCA clean is to remove organic contaminants (such as dustparticles, grease or silica gel) from the wafer surface. There are three steps to be performed. The first step is to remove organic contaminant from surface of wafer. Second step is to remove any oxide layer
- Others perennial allergens include domestic pets (cats, dogs, rabbits, Guinea pigs)
III. Occupational allergens
The presence of work related symptoms with improvement during periods away from work provide essential clue to diagnosis. These include:
Flour in bakers
Laboratory animals
Wood dusts.
Latex particles.
IV. Food and drug induced rhinitis
Food induced rhinitis may be due to