Plant Regeneration and Somatic Embryogenesis from Immature Embryos Derived through Interspecific Hybridization among Different Carica Species

Plant regeneration and somatic embryogenesis through interspecific hybridization among different Carica species were studied for the development of a papaya ringspot virus-resistant variety. The maximum fruit sets were recorded from the cross of the native variety C. papaya cv. Shahi with the wild species C. cauliflora. The highest hybrid embryos were recorded at 90 days after pollination and the embryos were aborted at 150 days after pollination. The immature hybrid embryos were used for plant regeneration and somatic embryogenesis. The 90-day-old hybrid embryos from the cross of C. papaya cv. Shahi × C. cauliflora showed the highest percentage of germination, as well as plant regeneration on growth regulators free culture medium after 7 days pre-incubation on half-strength MS medium supplemented with 0.2 mg/L BAP, 0.5 mg/L NAA and 60 g/L sucrose. The 90-day-old hybrid embryos from the cross of C. papaya cv. Shahi × C. cauliflora produced maximum callus, as well as somatic embryos when cultured on half-strength MS medium containing 5 mg/L 2,4-D, 100 mg/L glutamine, 100 mg/L casein hydrolysate and 60 g/L sucrose. The somatic embryos were transferred into half-strength MS medium containing 0.5 mg/L BAP and 0.2 mg/L NAA and 60 g/L sucrose for maturation. The highest number of regenerated plants per hybrid embryo (10.33) was recorded from the cross of C. papaya cv. Shahi × C. cauliflora. Isoenzyme and dendrogram cluster analysis using UPGMA of the regenerated F₁ plantlets confirmed the presence of the hybrid plantlets.     

Home truths: Are housing-related events more important for residents’ health compared with other life events?

Moving home and home improvements are significant life events, but their health impacts are rarely studied in relation to other life events that occur relatively frequently in deprived populations. This article examines both housing and personal life events over a three year period among a study group living in deprived areas of Glasgow, in order to consider their impacts upon the health and well-being of residents. Housing-related events are the most frequently occurring life events, with relatively minor negative impacts upon physical and mental health and mental well-being; the effects of housing events are attenuated when other life events are taken into account. The largest negative effects on health are associated with serious health episodes, crime victimisation and relationship break-up, with the largest positive effects associated with getting a job. There is a case for holistic regeneration which offers personal support for life events and seeks positive interactive effects.     

工矿企业废油的再生新工艺研究

针对工矿企业实际情况提出了废油（主要是废化油）的再生新工艺。实验结果表明，该工艺具有综合利用率高，成本低，无二次污染，油的回收率可达90．1％以上。克服了传统废油再生工艺的缺点。     

煤气管网腐蚀状况分析与整改

介绍了某气管网腐蚀调查结果并分析其腐蚀原因，对煤气管网的全面改进了综合评述。     

一步法废润滑油再生工艺开发

开发的一步法废润滑油再生工艺（简称XL工艺）把高温絮凝与蒸馏过程有机地结合在一起加工废润滑油，再生润滑油的收率在80％以上，另有5％的轻油和15％的重质燃料油。该工艺流程简单、投资低，为国内废润滑油的再生提供了一条新途径。     

热钾碱法脱碳溶液双塔变压再生改造及余热回收

为了降低脱碳再生热耗,陕西兴化集团有限责任公司对一期脱碳系统实施了双塔变压再生的技术改造;并应用热水型溴化锂制冷技术回收脱碳系统贫液的低位热能。技改结果表明:①脱碳再生系统溶液处理能力从370m3/h提高到550 m3/h,再生热耗从5 308 kJ/m3下降到4354 kJ/m3;②成功回收脱碳系统贫液低位热能,制得7℃的冷冻水用于氨合成系统,夏秋两季可增产合成氨20 t/d。     

Bio‐Regeneration of Desulfurization Adsorbents by Selected P. delafieldii R‐8 Strains

Abstract

Adsorption properties of different adsorbents such as reduced NiY, AgY, alumina, 13X, and activated carbon were studied with dibenzothiophene (DBT) and naphthalene as model compounds. The desorption of DBT was carried on thermo gravimetric–differential thermal analysis (TG‐DTA). The interaction of DBT with different adsorbents follows the sequence: activated carbon > reduced NiY > AgY > activated alumina > 13X. The bio‐regeneration of these adsorbents was studied with P. delafieldii R‐8 as desulfurization strains. Adding P. delafieldii R‐8 cells can improve DBT desorption from adsorbent AgY. The desorption of DBT from adsorbents by bio‐regeneration of adsorbents follows the sequence: 13X > alumina > AgY > reduced NiY>activated carbon. The presence of naphthalene can decrease the desorption of sulfur compounds. The adsorption capacity of AgY decreases for the first time recycling and then changes little. The decrease of the adsorption capacity is due to the loss of Ag⁺ ions.     

柱状活性炭电热再生技术的试验研究

以北京某水厂常年吸附饱和的活性炭为研究对象，对静止和流动两种状态下饱和活性炭的电阻率随温度的变化进行对比，同时探究活性炭电热再生炉的再生机理，考察不同温度条件下的再生效果。结果表明，在流动状态下，饱和活性炭的电阻率随温度升高而降低的效果更好。实验所用电热再生炉就是利用这一性质实现活性炭的高温再生。再生取样结果表明，850 ℃的再生效果最好，其再生炭的碘吸附值和亚甲蓝吸附值分别达到新炭的91.1%和92.7%。     

济钢25t转炉煤气回收技术

介绍了济南钢铁集团总公司 (简称济钢) 2 5t转炉煤气净化回收工艺特点及主要设备 ,论述了转炉煤气净化回收技术、创新、设备改造、主要工艺参数的确定、回收操作和安全措施 ,阐明了此技术有着巨大的经济效益、环保效益和社会效益。     

Systemically Administered,Target Organ-Specific Therapies for Regenerative Medicine

Growth factors and other agents that could potentially enhance tissue regeneration have been identified, but their therapeutic value in clinical medicine has been limited for reasons such as difficulty to maintain bioactivity of locally applied therapeutics in the protease-rich environment of regenerating tissues. Although human diseases are treated with systemically administered drugs in general, all current efforts aimed at enhancing tissue repair with biological drugs have been based on their local application. The systemic administration of growth factors has been ruled out due to concerns about their safety. These concerns are warranted. In addition, only a small proportion of systemically administered drugs reach their intended target. Selective delivery of the drug to the target tissue and use of functional protein domains capable of penetrating cells and tissues could alleviate these problems in certain circumstances. We will present in this review a novel approach utilizing unique molecular fingerprints (“Zip/postal codes”) in the vasculature of regenerating tissues that allows target organ-specific delivery of systemically administered therapeutic molecules by affinity-based physical targeting (using peptides or antibodies as an “address tag”) to injured tissues undergoing repair. The desired outcome of targeted therapies is increased local accumulation and lower systemic concentration of the therapeutic payload. We believe that the physical targeting of systemically administered therapeutic molecules could be rapidly adapted in the field of regenerative medicine.