High Flow Nasal Cannula(HFNC) oxygen therapy is a form of non –invasive respiratory support, which comprises an air oxygen blender, an active humidifier, a single heated circuit and a nasal cannula. It delivers adequately heated and humidified medical gas up to 10-60L/min, and is considered to have a number of physiological effects: reduction of anatomical dead space, PEEP effect, constant fraction of inspired oxygen and good humidification. HUMID BH,Hfnc For Infants,Hfnc Flow Peep,High Flow Oxygen Delivery Shenyang RMS MEDICAL TECH CO.,LTD , https://www.medicalrms.com
It is widely used in RICU and ICU.
The number of suitable seedlings for tomato seedlings is 1 to 2 times, which is the most common one. The main reasons why tomato seedlings are not suitable for multiple seedlings are: (1) Reduce root damage. Because the more the number of seedlings, the more serious damage to the root system will easily lead to premature root ageing. (2) Avoid forming aging seedlings. After the number of sub-seedlings is too many, the root group will not be fully expanded and the absorption capacity will be weak, which will cause the seedlings to be inhibited from growing due to insufficient nutrient supply. When the seedlings are inhibited for too long, they will form an aging seedling. . (3) Avoid prolonging the nursery period. It has been proved that when tomatoes are seeded once every minute, the tomato seedlings of the same size are cultivated due to the hardening seedlings before seedling separation and the reasons for seedling emergence after transplanting, and the nursery time is prolonged by 5 to 8 days accordingly, when the environmental conditions are not suitable. It will take longer to extend. (4) Reduce other damage to tomato seedlings. Seedlings are vulnerable to starvation if the seedlings are separated. Fragmentation during flower bud differentiation can have adverse effects on flower bud differentiation.