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1, SPF stands for Sun Protection Factor.

2, Wear a minimum SPF 15 sunscreen.

3, But what does the SPF rating really mean?

4, This non - chemical sun protection factor SPF 30.

5, Cell cycle analysis indicated that the DNA synthesis fraction (SPF) of diploidy carcinomas was between normal colonic mucosa and aneuploidy carcinomas.

6, The fifteen newborn SPF ( Specific Pathogen Free ) piglets obtained by caesarean operation were randomly divided into three groups.

7, OSPF selects the fastest loop-free path from the SPF tree as the best path in the network.

8, Conclusion DNA aneuploidy, SPF and EGFR is associated with malignant degree of gliomas.

9, I applied sunscreen with SPF 30 and took out my silk - padded quilt to the roof.

10, Objective To determine the growing index of SPF miniature pig.

11, Forty - eight male SD rats in a SPF grade were selected.

12, Crutchfield advises choosing a sunscreen with SPF 15 or higher.

13, Compared with SPF and MIRA (minimum interference routing algorithm) via simulation,[http://sentencedict.com/spf.html] the algorithm shows better performance in either decreasing refusing rate or balancing network load.

14, Helps prevent sunburn. High SPF gives more sunburn protection. Helps prevent and temporarily protects dry, chapped, or windburned lips.

15, SPF is really sunburn protection factor, even though we call it sun protection factor.

16, Intra-arterial infusion chemotherapy can reduce the SPF of cervical carcinoma tissues and inhibit cell proliferation.

17, MethodsThe some hematological and biochemical indexes were determined by semi-automatic biochemical analyzer and hemacytometer in 10 kinds of usual SPF grade rats and mice of different ages and sexes.

18, Proventriculus type of avian infectious bronchitis isolate virus D971 was used to infect SPF chickens. Infected chickens manifested emaciation, diarrhea and mild dyspnea after inoculation.

19, You definitely won't get a sunburn because this suntan lotion is SPF ( sun protection factor ) 30.

20, Reapply every two to three hours spent outdoors . Also[Sentencedict.com], use lip balm an SPF rating.

21, Many after-shave lotions and moisturizers have a sunscreen (usually SPF 15 or greater) already in them, and this is sufficient for everyday activities with a few minutes here and there in the sun.

22, Objective To study a BV antibody surveillance model for establishment and maintenance of Macaca mulatta SPF colony.

23, A good sunscreen in a tanning lotion to prevent sunburn should have a minimum SPF (sun protection factor) rating of 15 to prevent nasty sunburns.

24, You can say so. But don't bother anything above SPF 30.

25, The only products an expiration date are those containing SPF.

26, People think higher sun protection factor (SPF) numbers offer more protection. Dermatologists , however, say that an SPF of 50 does not provide much more protection than an SPF of 30.

27, Objective In order to set up particular mutation mice population of SPF by using purging method.

28, Use a sunscreen with a sun protection factor (SPF) of 15 or higher: The SPF number only indicates the protection against UV-B rays.

29, Because you want to be safe from the sun, I'd recommend applying every 1-2 hours, no matter the SPF.

30, Under proposed FDA regulations, a four-star rating system for UVA protection will be added alongside SPF.