Abstract As a reserve force for a pasture, calf determines the future of the ranch and the future profit of the ranch. The calf's scientific rearing is the most important part of sustainable development of a ranch. Calf management is a complex and detailed work, breeders need to consider three factors: nutrition, disease, and environment. In order to make calves become a good reserve cattle, it is important to ensure that calves have a balanced, adequate nutrition, reduce calving morbidity, mortality, and a suitable environment. More excellent young cattle can produce more prolific lactation cattle. This article introduce the calf feeding and management work from the feeding and management, environmental management and other aspects.

Abstract In this paper, the recent progress of bio-diesel from microalgae in recent years was reviewed. The research history of microbes from microalgae and the breeding and culture of microalgae were studied. Methods and techniques, and compare the microalgae with biofuel prepared from other energy crops. It is pointed out that microalgae is a kind of renewable energy with broad application prospect, and the future of microalgae production Direction of development.

Abstract At present, tumors especially malignancies, have become one of the most serious diseases that threaten human health. The use of chemotherapy, radiotherapy, surgery, biotherapy and integrated traditional Chinese and Western medicine is the most effective means of treating tumors. Among them, the application of new anti-tumor drugs, in improving the quality of life of cancer patients to extend the survival time, delay the development of the disease has played a huge role. In this paper, we reviewed the related research progress of tumor cells from the aspects of tumor features, related signal pathways, related genes, epigenetic modification, tumor stem cells and tumor microenvironment, so as to have a more comprehensive understanding of tumor and cell apoptosis.

Abstract MicroRNA (miRNA) is a single-stranded small molecule RNA of non-coding proteins with a length of about 18-24 nucleotides in eukaryotic cells. It is widely found in multicellular organisms and viruses. The miRNA itself is not encoding protein which is mainly through the nucleic acid sequence complementary pairing to a specific target mRNA and inhibit the target mRNA translation process or degradation of target mRNA, thereby inhibiting protein synthesis and regulation of gene expression. According to reports, microRNAs are widely involved in the physiological and biochemical immune response process and their dysfunction may lead to tumorigenesis, viral infection, abnormal expression of hematopoietic cells and immune diseases (RA, SLE) and other pathological phenomena. This paper describes the related mechanisms of mirna and some progress in the immune system.