Hossam Hussein Azzaz

Hossam Hussein Azzaz
National Research Center, Egypt | NRC · Department of Dairy Sciences

Associate professor
Now I work on bacteriocin production from lactic acid bacteria for animal nutrition applications

About

50
Publications
20,739
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Citations
Introduction
Dr. Hossameldeen Hussein Azzaz is an Associate professor at Dairy Sciences Department, National Research Centre, Egypt. Hossameldeen is expert in rumen stimulation techniques, livestock feeding, feed formulation, feed additives, feed evaluation and microbial enzymes production. Also, Dr. Azzaz has the membership of many of scientific projects and professional societies. My research focus now on phytogenic and microbial feed supplements for ruminant’s performance enhancement
Additional affiliations
November 2018 - present
National Research Center, Egypt
Position
  • Professor (Associate)
November 2013 - present
National Research Center, Egypt
Position
  • Researrcher of Dairy animal nutrition
November 2013 - present
National Research Center, Egypt
Position
  • Doctor of Dairy animal nutrition

Publications

Publications (50)
Article
The associative effects of Chlorella vulgaris microalgae and copper (Cu) supplementation on feed utilisation and lactational performance in goats were evaluated. Thirty-two lactating Boer goats (34.8 ± 1.7 kg body weight) were used to evaluate the supplementation of C. vulgaris microalgae at 10 g/day (AL treatment), 9 mg of Cu/kg diet (CU treatment...
Article
Inclusion of tannase enzyme, in tannin rich diets of lactating animals can be explored as a strategy to overcome the negative effects of tannins on feed utilization and lactational performance. The present study aimed to compare the effect of replacing commercially available exogenous tannase with a newly developed tannase, produced from Aspergillu...
Article
Full-text available
Pectinase hydrolyses pectin and increases the utilization of agriculture byproducts as feeds for ruminants. A newly developed pectinase from Aspergillus terreus was compared with a commercially available pectinase at 600 IU/kg feed on feed utilization and lactational performance of Damascus goat fed orange pulp and sugar beet pulp based diet (i.e.,...
Article
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The supplementation with herbal and medicinal plants to animals showed positive effects on feed digestion, performance and animal’s health. Fifteen multiparous Egyptian buffaloes (537 ± 18.1 kg body weight), 7 days after parturition, were randomly assigned to 3 treatments in a quintupled 3 × 3 Latin square design in a 63-day experiment. Each experi...
Article
Full-text available
Abstract: The experiment was conducted to study the effects of supplementing a cellulase enzymes cocktail to lactating buffaloes’ diet, on the nutrient intake, nutrient digestibility, and milk production performance and composition. Twenty-four lactating Egyptian buffaloes were assigned into one of the following treatments: CON—control consisted of...
Article
Olive tree by-products (OTB) were examined to be used as an alternative feed for ruminants after improving their chemical composition through urea and Phanerochaete chrysosporium treatments. Twenty eight lactating Barki ewes were randomly assigned to four groups ( seven animals each) using the complete random design. Ewes were fed 70% concentrate f...
Article
Full-text available
A newly developed pectinase from Aspergillus terreus was compared with a commercially available pectinase at 600 IU/kg feed. Thirty (one-week postpartum) Damascus goats stratified by previous milk production, body weight and parity were divided into three experimental treatments. Does were fed a basal diet containing concentrates, orange silage, su...
Article
Full-text available
bstract | The present study was performed to evaluate the effects of pectinase enzymes inclusion in the ration on lactating buffaloes performance, nutrient digestibility, blood chemistry and yield and composition of milk. The experiment conducted twelve lactating Egyptian buffaloes having their 3rd to 5th lactation and weighed 480± 8 kg in average....
Article
Full-text available
Background and Objective: Dairy wastes are sources of environmental pollution and efficiently used for production of added value products is an important issue. The aim of this study was to use milk permeate for production of Saccharomyces cerevesia biomass, as baker's and feed yeast. Materials and Methods: The fermentation process was conducted wi...
Preprint
Pectinase production for improving buffalo's diets digestion is the main objective of this work. Effects of fungal strains and different cultivation conditions on pectinase production have been studied. In vitro batch culture technique was used for investigate impact of the produced pectinase compared with commercial pectinase (SMIZYME ®) on rumen...
Article
Full-text available
Background and Objectives: Pectinase as a fibrolytic enzyme is a main tool for effective use of pectin rich agro-residues as alternative feed resources. Production of pectinase by Aspergillus terreus on medium of sugar beet pulp to be used as a feed supplement for dairy animals was the main objective of this study. Materials and Methods: Impact of...
Article
Full-text available
Background and Objectives: The search for cheap-safe tools for promoting farm animal productivity is the main concern of the animal nutritionists’ nowadays. The main objective of this study was to evaluate impact of cellulase new formula for promoting performance of lactating Baladi goats. Materials and Methods: Eighteen early lactating Baladi goat...
Article
Full-text available
Pectinase production for improving buffalo's diets digestion is the main objective of this work. Effects of fungal strains and different cultivation conditions on pectinase production have been studied. In vitro batch culture technique was used for investigate impact of the produced pectinase compared with commercial pectinase (SMIZYME ®) on rumen...
Article
Full-text available
Background and Objective: Cellulase as a fibrolytic enzyme is a highly effective tool for agricultural waste treatments. Production of cellulase enzyme on medium of agricultural wastes by Fusarium graminearum to be used in ruminant feeding was the main objective of this study. Materials and Methods: Impact of initial pH of growth medium, different...
Article
Full-text available
Background and Objectives: Huge amounts of permeate produced from ultrafiltration of milk for cheese processing were wasted and represent a serious environmental pollution problem. Utilization of such permeates for production of added value products as yeast biomass or baker's yeast would be profitable from the economical and the environmental poin...
Article
Full-text available
Background and Objective: Cellulases enzymes are widely be interested due to its capability to degrade lignocellulosic materials. The current study was concerning on investigating different factors of cellulase production from fungal sources by using agricultural wastes and studying its impacts on ruminal digestion and fermentation. Materials and M...
Article
Full-text available
Background and Objectives: Enhancing poor quality roughages by biological treatments has interested for many researches in last years. So, in the current study was carried out to production of tannase enzyme by Aspergillus terreus and its impact on ruminal fermentation, degradability and gas production were evaluated through in vitro trials. Materi...
Article
Full-text available
olive trees by-products (OTB) has high fiber and low protein content that could limit its use for feeding animals. This work aimed to investigate the effect of replacement of berseem hay in the diet of lactating Barki ewes by OTB treated with increasing levels of urea on Animal’s nutrient digestibility, milk yield and milk composition. Thirty-five...
Article
Full-text available
Xanthan gum is a microbial product and important polysaccharide of high commercial value. It has many industrial applications, in food, chemical, pharmaceutical, textile and oil industries. This review summaries deferent items of xanthan gum production, comprising the producing bacterium Xanthomonas campestris, substrates used, especially the recen...
Article
Full-text available
Background and Objectives: Supplementing diets of dairy animals with phytase and xylanase can enhance phosphorus availability and fiber degradation in the rumen and positively affect animal’s health and productivity. In vitro and in vivo trials have been conducted to define the optimal addition level of xylanase and phytase to lactating Baldi goat’...
Article
Full-text available
Background and Objective: Utilization of date seeds (processed date by product) as a feedstuff in diets of farm animals are being in spotlight, this study were carried out to investigate the effect of feeding diets contain cracked date seed with or without fibrolytic enzyme, versus control diet using Egyptian buffaloes. Materials and Methods: Fifte...
Article
Full-text available
Propionibacteria are natural inhabitants of the rumen that make up 1.4% of ruminal microflora and produce propionate, a major precursor for glucose production by hepatic gluconeogenesis. Several mechanisms have been suggested for the mode of action of direct-fed bacteria in ruminants include stimulation of desirable microbial growth in the rumen, a...
Article
Full-text available
The aim of this study was to evaluate the effect of different level of probiotic supplementation to ruminant rations, using in-vitro batch culture technique to determine degradation and fermentation parameters. In vitro experimental ration was formulated, the ration consisted of 40% alfalfa hay and 60% concentrate feed mixture.
Article
Full-text available
Growing of public concerns towards use of antibiotics in animal feeding paved the way for probiotics utilization enlargement. Lactic acid bacteria (LAB) as a probiotic could improve dairy animal’s performance through prevention of ruminal acidosis; stimulate digestive enzymes production and secretion and stimulate animal’s immune system. The action...
Article
Full-text available
Evaluate impact of the marjoram and parsley by-products on rumen fermentation characteristics (in vitro) and the productive performance of early lactating buffaloes (in vivo) are the main objectives of this study. Two in vitro experiments were conducted to evaluate the effect of partial and full substitution of control ration's rice straw by marjor...
Article
Full-text available
Background and Objective: Olive trees by products (OTB) as agro-waste not efficiently used and left it without treatment may cause serious economical, social and environmental problems. Biological treatments for such wastes can upgrade their nutritive values to be used as alternative feeds for ruminants. Investigate if their synergism between T. vi...
Article
Full-text available
Background and Objective: Feather wastes are the most abundant keratinous material in the nature and its accumulation causes multiple environmental problems. Nutritive value upgrading of such wastes through biological treatments may provide ruminant's rations with high quality and cost effective source of protein. Therefore, the main objective of t...
Article
Full-text available
he present study was carried out at farm and laboratory of Animal Production Department-Faculty of Agriculture, Fayoum University, Egypt. Fibrolytic enzymes were evaluated throughexperiments conducted by using nine of lactating baladi goats after 20 days of parturition and divided into three groups, three animals per each group. The first group was...
Article
Full-text available
Background and Objectives: Most utilized grains in livestock feeding in Egypt are imported from abroad, therefore searching for alternative feed ingredients to replace of high cost feed grains is very important approach. This research aimed to investigate the effects of partial replacement of corn grains by Powdered Date Seeds (PDS) or PDS+fibrolyt...
Article
Full-text available
Objective: Fungal cellulase production under the optimum conditions and investigates the impact of the produced cellulase on degradation of goat’s rations compared with commercial cellulase source. Materials and Methods: Asperigillus niger, Asperigillus flavus, Asperigillus fugimatus, Trichoderma viride and Penicillium chrysogenum were separately g...
Article
Full-text available
Objective: This study was designed to evaluate impact of adding M. oleifera and E. purpurea dried leaves to diets of Rhamani lactating ewes on their rumen fermentation characteristics, nutrients digestibility, blood parameters, milk yield, composition and its fatty acid profile. Materials and Methods: Fifteen Rhamani lactating ewes after 1 week of...
Article
Full-text available
Improved ruminant's health and its productive performance has always remained a primary goal of researchers associated with the animal production sector. Microbial feed supplements as natural growth promoters might play an important role for enhancement of health and productive performance of ruminants through prevention of disease, enhancement of...
Article
Full-text available
Ionophores are feed additives that alter rumen microbial populations through ion transfer across cell membranes. Although ionophores have been used widely in the ruminant's nutrition for improved feed efficiency and control of coccidiosis. Ionophores have been studied regarding several potential effects on ruminant animals, including influences on...
Article
Full-text available
This study was conducted to investigate the effect of Aspergillus awamori (Tomoko) and ® Lactobacillus acidophilus (Veta-Zyme Plus) as microbial feed supplements on in vitro and in vivo feed ® nutrients digestibility, rumen fermentation characteristics, blood parameters, milk yield and milk composition of lactating Nubian goats. In the in vitro tri...
Article
Full-text available
This study was conducted to study the effect of yeast culture (Saccharomyces cerevisiae) supplementation either alone or in combination with Propionibacterium freudenreichii strain P169 on nutrient digestibility coefficients, blood metabolites, milk yield and milk composition of mild lactating buffaloes. Fifteen lactating buffaloes, 2 months after...
Conference Paper
Full-text available
Probiotics have been shown to improve anaerobiosis, stabilise pH and supply nutrients to microbes in rumen microenvironment. In this concern, the Yeast Saccharomyces cerevisiae (Y) or Yeast + propionibacteria (Y+P) were used as ration additives for lactating buffaloes. Their effects on nutrients digestibility, milk yield and composition were studie...
Article
Full-text available
The production of pectinase under the optimum fermentation conditions was studied. Asperigillus niger was grown as stand cultures in 1000ml conical flasks containing 100 ml beet pulp powder medium for screening its ability for utilizing sugar beet pulp as main carbon source for pectinase production. The maximum production of pectinase by A.niger wa...
Thesis
The current study aimed to produce pectinase to be involved in rations of lactating buffaloes. The maximum production of pectinase by A.niger was achieved at16% sugar beet pulp concentration, inoculum size of 5%, 48 hr of incubation period, initial pH of growth medium 7.0, yeast extract as a nitrogen sources at a concentration of 0.33 g N/l. Two ex...
Article
Full-text available
The production of cellulase under the optimum fermentation conditions was studied. Non toxic Asperigillus flavus NRRL 5521 was grown as stand cultures in 500ml conical flasks containing 50 ml cellulose powder medium (CPM) for screening its ability for utilizing agricultural wastes as a carbon sources for cellulase production. The maximum production...
Article
Full-text available
Two experiments were carried out to evaluate the effects of fibrolytic enzymes supplementation on in vitro degradation of sugar beet pulp and in vivo nutrients digestibility, milk yield and its composition by mild-lactating buffaloes. In the in vitro experiment, dry matter and organic matter disappearance (IVDMD and IVOMD) were determined for sugar...
Article
Full-text available
An in vitro study was conducted to evaluate the effect of cellulases addition to banana wastes on dry matter (IVDMD) and organic matter (IVOMD) disappearances. Laboratory produced cellulase (Asperozym) and a commercial cellulolytic enzyme source (Bacillozym) were added separately to banana wastes at 4 levels (0, 0.77, 1.54, 2.31and 3.08 Unit / kg...
Article
Full-text available
The production of cellulase by Asperigillus niger, Fusarium oxysporum, Fusarium avenaceum and Cephalosporium acremonium was studied. These fungi were grown as stand cultures in 1000ml conical flasks containing cellulose powder medium for screening their ability for utilizing cellulose as main carbon source for cellulase production. A. niger was cho...
Article
Full-text available
Pectinases are widely distributed in higher plants and microorganisms. They are today one of the upcoming enzymes of the commercial sector. It has been estimated that microbial pectinases account for 25% of the global food enzymes sales. Microbial pectinases can be produced from bacteria including actinomycetes, yeast and fungi. Aspergillus niger i...
Article
Full-text available
Production of cellulase is of great significance in present day biotechnology. Cellulose biodegradation by cellulases, produced by numerous microorganisms is very important in several agricultural and waste treatment processes. The development of microbial strains, media composition and process control has including submerged fermentation and solid...

Questions

Questions (2)
Question
in another words,how can i prepare a feasibility study illustrate the input and the output of cellulase production process by submerged fermentation in pilot scale or semi industrial scale using fermenter capacity 50-100 litre?
Question
hello every body, i want to know anything about the application of nano technology in the dairy animal feeding

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Projects

Projects (6)
Project
Improving productive performance of ruminants
Project
Improving digestibilities of roughage as orange Pell ,wheat straw ,rice straw .etc. Increasing crude protein and decreasing crude fibre of roughage this will be increased performance of animal as milk yield and components and weight of calves. Using un conventional treated roughage will be enhanced economic values.
Project
Upgrade the nutritional values of agriculture by products and dairy wastes to be involved in animals feeding and consequently help to cover the shortage in feedstuffs and reduce the environmental pollution and consequently health hazards resulting from it