This paper presents a general mathematical optimization model and the related deterministic algorithm for synthesizing heat-exchanger networks HEN). The methodologies commonly used to solve a HEN problem are based on heuristic methods. These algorithms reach a presumed best olution with respect to the investigated set of process streams, whereas our approach determines the optimal configuration...

Mục tiêu: Mô tả kiến thức, thực hành về kiểm soát bệnh hen của người phế quản. Xác định mức độ cơn quản bằng Test ACT. Tìm hiểu các yếu tố liên quan đến Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô cắt ngang trên 76 điều trị tại Khoa Nội Tổng hợp – tiết, Bệnh viện Trường Đại học Y - Dược Huế từ tháng 10/2020 4/2021. Bộ câu hỏi xây dựng được đạt chuẩn tin cậy gồm 3 phần: Kiến hen. Kết quả:...

Effects of dried Portulaca oleracea supplementation to the laying hen diet on productive performance, egg physical traits, fatty acid composition, and cholesterol content | Antonella Dalle Zotte, Gianluca Pranzo Agricultural Journals

The experimental evidence had made clear that some substance is produced in the testis of the male Sebright that suppresses in him the development of the secondary sexual plumage of the cock of his species. The detection in his testis of lutear cells like those in hens makes the conclusion highly probable that it is these cells that cause the suppression of cock-feathering in both the Sebright ...

Two thousand four hundred and ninety eggs were collected from retail markets in 6 provinces and from laying hen farms in 3 provinces. Eggs were pooled in groups of 3 to obtain 830 samples for testing. Isolation of salmonellae was made from both egg shell and egg contents. Eggs from retail markets were contaminated with salmonellae on egg shells (13.2%) and in egg contents (3.9%). Three (0.4%) s...

A strategy is proposed for the synthesis of a flexible heat exchange network (HEN) that involves specified uncertainties in the source-stream temperatures and flow rates. The problem is decomposed into three main iterative steps: (1) the simultaneous HEN synthesis to attain a network configuration with a minimum total annual cost (TAC); and (2) the flexibility analysis to test the feasible oper...

In comparison with hen egg white lysozyme, goose lysozyme is known to be aberrant in both its structure and its enzymatic behavior in the presence of polymers of N-acetylglucosamine or cell suspensions of Micrococcus luteus. Our chemical studies show, however, that like the hen enzyme, goose lysozyme has muramidase activity. At several pH levels ranging from 3.5 to 7.1 the goose enzyme liberate...

With the Weihenstephan funnel nest box, 12 laying hen flocks were tested for their individual laying performance, egg quality, and nesting behavior in a noncage environment. During the whole observation period of 8 yr, a transponder-based data recording system was continuously improved and resulted in a recording accuracy of 97%. At peak production, heritabilities for the number of eggs laid ar...

The aim of this contribution is to present an industrial application of mathematical programming for the simultaneous synthesis of a biogas plant and its heat exchanger network (HEN), within an existing meat company. The heat-integrated model recently developed by Drobež et al. (2010) has been extended with Yee & Grossmann simultaneous optimization MINLP model (1990) for the synthesis of heat e...

Four-day-old epimastigote culture forms of Trypanosoma cruzi, Trypanosoma rangeli and Trypanosoma conorhini were tested with 21 lectins. Furthermore T. conorhini was incubated with the following sera: rat, Wistar HAN, germ free; normal fresh hen, rat and human serum. T. rangeli was agglutinated only by the D-mannose specific lectins from Canavalia ensiformis and Pisum sativum. T. cruzi and T. c...