Abstract The paper is a review on the extraction processes of cellulosic fibers from flax and hemp. two lignocellulosic crops have long history use by humans for bast among other purposes. utility declined over time with industrial advances changes to economy, but late, an increase focus environmental impact sustainability, there renewed interest in these resources. biomass-based resource requi...

background: in patients with non-obstructive azoospermia (noa), vital spermatozoa from the tissue is obtained from testes by enzymatic treatment besides the mechanical treatment. objective: to increase the sperm recovery success of testicular sperm extraction (tese), with enzymatic digestion if no sperm is obtained from testis tissue by mechanical method. materials and methods: tissue samples w...

background: in algeria, date palm is currently confronted to the bayoud disease. biotechnological tools such as protoplasts fusion can appear as an alternative to ensure rapid multiplication and improvement of this species.objectives: callogenesis induction in protoplasts isolated from embryogenic callus of three date palm cultivars.materials and methods: some factors influencing the isolation ...