Integrated farming is profitable

Growing fish with rice while maximizing land use can bring advantages to both crops as production is intensified. Details are given of the basic structure of rice field aquaculture, listing the major advantages and disadvantages of this system. Particular reference is made to the integrated farms at Culasi, Antique (Western Philippines) and at Barangay Igcocolo, Guimbal, Iloilo where agricultural crops other than rice are integrated with fish farming (tilapia -- Oreochromis mossambicus) and livestock rearing. An account is also given of the system at the AQD site at New Busuang, Kalibo, Aklan which evaluates the economic feasibility and profitability of farming mudcrab in tidal flats with existing mangroves.

Catfish culture in Southeast Asia

Catfish rank fifth in the world in terms of fresh and brackishwater fish culture. In Asia and the Pacific, the Clariidae family dominates production, representing nearly 80% of the total catfish production. Among the most cultured species are Clarias batrachus, C. macrocephalus, C. gariepinus. The domestic market generally absorbs catfish produce in Asia, although high-producing countries like Thailand and Vietnam engage in export. There are two basic markets for catfish: live fish and processed fish. Particular details are given of catfish production in Thailand, Indonesia and Malaysia.

淋巴细胞免疫治疗原发性习惯性流产

对49例确诊为原发性习惯性流产(41.76%)中的29例采用丈夫肘静脉血40ml分离淋巴细胞行主动免疫治疗(一般妊娠前治疗两次,妊娠后治疗两次),现有17例妊娠,其中11例已分娩;5例在中期妊娠;1例失败。妊娠成功率为94.12%(16/17)。另20例未经主动免疫治疗作为对照组,妊娠成功率为27.78%(5/18),两组相比差异有显著性(P<0.05),对部分病例进行了治疗前免疫状态检测,包括微淋巴细胞毒抗体阴性,杀伤淋巴细胞低下改变的检测。结果提示丈夫淋巴细胞主动免疫法的有效性及可提高患者免疫反应性,有较可靠的临床效果及应用价值。

河蟹池中套养鳜鱼技术要点

<正>在河蟹养殖池中套养鳜鱼,两者互不相残,而且具有协同、促进作用。野杂鱼类利用河蟹残饵,鳜鱼捕食野杂鱼类,以低值鱼换来了优质鱼;同时,解决了野杂鱼类与河蟹争食、争溶氧的问题,更有利于河蟹生长。实践证明,与单养河蟹的池塘相比,不但增加了鳜鱼产量和收入,河蟹规格、产量也得到了提高,可以取得明显的生态和经济效益。笔者总结了湖北洪湖、监利等地在河蟹池中套养鳜鱼的先进技术,希望对广大养殖户有所帮助。

南瓜叶作为鱼类、鳖类专用青饲料的栽培方法

<正> 在浙江省湖州市菱湖镇、双林镇等乡村以盛产淡水鱼而著称。养鱼户每家每户都栽种南瓜,常常将南瓜叶用来饲养草鱼。到了秋季南瓜收获后,就将南瓜藤叶全部切碎投喂大草鱼。在双林镇有一位养鱼能手章阿财,他专种南瓜饲养大草鱼,不但产量高,草鱼很少患细菌性鱼病,多次被评为县劳动模范,作者曾学习他养鱼高产经验和独特的南瓜栽培方法。

网湖灌江纳苗的效益评价

网湖灌江纳苗的效益评价孙建贻周春生段中华（中国科学院水生生物研究所，武汉４３００７２）灌江纳苗就是在长江四大家鱼繁殖季节，当鱼苗“发江”时，适时开启沿江湖泊的通江闸门，家鱼及其他种类的鱼苗随水流入湖中，从而达到增加湖区渔业资源，提高鱼产量的目的。有关...

鳖类的营养成分与抗癌作用

<正> 鳖俗称甲鱼、团鱼,学名为中华鳖,它不是鱼而是水栖性爬行动物。近年来我国各地的养鳖业正在蓬勃地发展,成为特种水产业中的姣姣者。我国人工养殖的鳖主要是中华鳖和山瑞鳖,最近又从其他国家引进少量的佛罗里达鳖、马来鳖等。鳖类的肉味鲜美,营养丰富,是一种高级补品。中医药认为它有活血消瘀,滋补强身的功效。通常将它作为重病后或手术后身体虚弱的滋补、保健食品。就现阶段而论,鳖类的经济价值为各类淡水水产品之冠。我国民间普遍认为吃甲鱼有防癌、治癌的作用,民间的传说而今已被有关的科学成果所证实。1蛋白质含量高

Nonlinear optical properties and thermal stability of the poled polymer NTAB/PEK-c

Films of high glass' transition temperature polymer polyetherketone doped with chromophore 2,2'[4-[(5-nitro-2-thiazolyl)azophenyl]-amino]-bisethanol NTAB) were prepared, poled by the corona-onset poling setup which includes a grid voltage making the surface-charge distribution uniform at elevated temperature. The thickness of the films was measured by the Model 2010 Prism Coupler system. Second harmonic generation d(33) was measured by the second harmonic generation method, and the d33 is 38.12 pm/V at 1064 nm under the absorption correction. The nonlinear optical activity maintains is 80% of its initial value. (C) 2002 Elsevier Science B.V. All rights reserved.

半导体科学与技术

本书是在国家自然科学基金委员会信息科学部的支持下，邀请了三十余位工作在半导体研究领域第一线的知名专家撰写而成的。本书系统介绍了当前国际、国内半导体科学和技术各个领域，包括半导体材料的生长、物理问题、重要实验和理论结果、器件结构和应用等方面的基础知识、研究现状、发展趋势和有待解决的关键问题。 本书适合从事半导体研究和教学的大学教师、科技工作者、工程技术人员、研究生、本科生以及科技管理部门有关工作人员和管理专家阅读和参考。