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The purpose of this paper is to analyse how different strengths of simmelian ties affect knowledge spirals and investigate which major factors affect the influence of simmelian ties on knowledge spirals.

The empirical data in this paper were collected through e-mail and interview questionnaires to R&D teams in high-tech manufacturing enterprises in China. The authors obtained 132 teams' valid responses. The interval decision-making trial and evaluation laboratory (interval DEMATEL) method, differential evolution (DE) algorithm and Bayesian structural equation modelling (BSEM) were employed to test the theoretical framework developed for this paper.

The results show that strong simmelian ties have positive associations with high-performance work practices (HPWPs). Meanwhile, weak simmelian ties have positive associations with HPWPs. Furthermore, HPWPs and knowledge fermentation play a conducive role in the relationship between simmelian ties and knowledge spirals.

This paper contributes in three ways. First, it extends research on the relational antecedents of knowledge spirals. Second, this paper extends the study of social capital related to knowledge spirals. Third, this paper elucidates less familiar factors relating HPWPs to knowledge fermentation by testing the mediating role of HPWPs in knowledge fermentation.

This study had a threefold aim: to examine the impact of a Simmelian-tie tripartite alliance on corporate green innovation; to determine the chain-mediating roles of knowledge acquisition and knowledge integration; and to identify the moderating effect of network routines on the relationship between a Simmelian tie and green innovation.

Data were collected through 487 valid survey questionnaires from Chinese small and medium-sized manufacturing enterprises (SMEs). The authors examined the data through a structural model using partial least-squares structural-equation modeling (PLS-SEM) to test the research hypotheses.

The results reveal several key factors with positive impacts on enterprise green innovation. Specifically, a Simmelian tie significantly and positively affects enterprise green innovation. The results further reveal that knowledge acquisition and integration play mediating roles, while a network routine positively moderates the relationships among a Simmelian tie, knowledge acquisition and integration, and corporate green innovation.

This study is among the earliest empirical studies to investigate the influence of Simmelian ties on corporate green innovation for manufacturing companies. This study provides a theoretical basis for managers of firms, especially those of SMEs with limited resources, to fully use Simmelian ties to achieve environmentally sustainable innovation. In addition, this study validates and extends knowledge-management theory by verifying the linking roles of knowledge acquisition and integration and facilitating role of network routines.

The prayer against the Poultry (Hygiene) Regulations which we briefly mentioned in the editorial of our last issue, was lodged as a result of activity by the Environmental Health Officers' Association. Incidentally it is the first occasion as far as we can recall that a prayer has been lodged against any of the rash of food regulations of recent years, and reflects the strong feelings of the public health inspectorate.

This paper aims to systematically review the literature on quality management in agri-food supply chains (SCs) and propose an integrated conceptual framework.

A systematic literature review that analyses 93 papers in peer-reviewed academic journals published from 1996 to November 2021 is conducted. A conceptual model is advanced.

Based on a hierarchy of capabilities perspective, the authors develop an integrated conceptual framework in which SC quality (SCQ) management practices promote three levels of SC dynamic capabilities, which in turn lead to agri-food SCQ performance.

The authors propose a hierarchy of capabilities perspective of quality management in agri-food SCs and develop a conceptual framework. Furthermore, a number of propositions based on dynamic capabilities and the review findings are provided. Four future research directions are presented.

A three‐layer, cognitive domains, functional and resources, reference model for knowledge management systems is developed. This model aims at providing the basis for identifying the processes to be supported by any knowledge management support system (KMSS), for modeling the dynamics of these processes, for developing a framework of a business‐aware approach to KMSS development methodology, and for developing blueprints for information/communication technology (ICT)‐based KMSS. The first layer deals with the organizational knowledge and its characterization in terms of knowledge things. The concept of “K‐manipulating situation” is introduced and used as a conceptual construct for structuring the functional aspects of KMSS. While this construct combines knowledge and its manipulating processes, it also captures the social aspects of them by including the involved actors and their roles. Examples from Matsushita’s “Home Bakery” case study are used to illustrate the application of the reference model.

The aim of the paper is to evaluate the microbiological and physico‐chemical characteristics of fermented pounded yam, a unique and popular food of the Igbominas of Nigeria.

Fresh pounded yam was prepared in the laboratory by a modification of the traditional method, and then fermented for varying periods of time (0‐96hrs), also essentially by the traditional method. Analysis was carried out on the products following documented and established procedures.

Data obtained indicated noticeable increases in the populations of all the groups of microorganisms investigated with increases in fermentation time, except coliforms which declined in population after 24 hours. Heating of the samples after each fermentation interval resulted in significant reductions in microbial populations such that coliforms could not even be detected after 24 hours of fermentation. Lactic acid production, an indication of flavour development, and pH drop were highest at 48 hours of fermentation. The samples also became softer with increases in fermentation period. The heated samples were considered safe microbiologically, since they contained neither coliforms nor faecal coliforms.

The consumption of fermented pounded yam is encouraged since it is safe microbiologically and develops a desired flavour, while further research should be carried out on the nutritional benefits.

The findings here suggested that adequate heating after fermentation is necessary to eliminate any potential microbial contamination, and for full flavour development.

The results of this research contribute to the knowledge of fermented foods, especially those that are indigenous to Nigeria and West Africa.

Biopigments, natural colors from microbiological origin are of great interest because of their potential advantages over synthetic colorants. Therefore, this paper aims to evaluate the best possible fermentative conditions for the maximum production of biopigment using solid state fermentation and submerged fermentation by Monascus purpureus MTCC 369.

The biopigment was produced using solid state fermentation and submerged with optimized substrate to achieve higher yield. The statistical analysis was carried out using a Microsoft Excel ® (Microsoft Corporation).

On comparative analysis, it was observed that solid state fermentation resulted significant accumulation of biopigment (9.0 CVU/g) on the 9th day in comparison to submerged fermentation (5.1 CVU/g) on the 15th day.

Results revealed that sweet potato peel powder and pea pods provides necessary nutrients required for mycelial growth, and biopigment production, therefore, can be used as potent substrate for biopigment production by Monascus purpureus MTCC 369. Extracted color can be used in confectionery, beverages and pharmaceutical industries.

This work focuses on utilisation of waste for production of pigment as alternative source to synthetic colorant, and few studies have been carried out using wastes, but no work has been carried out on sweet potato peel to the best of the authors’ knowledge.

This paper is a systemic review on enset plant’s role in Ethiopian people’s life as the source of food. This paper aims to summarize the traditional processing and preparation methods of enset-based foods and their nutritional composition.

Available scientific articles were collected and reviewed for enset plant evaluation, description, enset plant’s role in Ethiopian people’s food security, post harvesting and traditional processing of enset plants, microbiology of the fermented enset foods, different foods reported from enset, nutritional profile of the three food from enset base (kocho, bulla and amicho) and other non-food applications of enset plant.

Enset plant has a predominant role in people living in the southern part of Ethiopia. This plant is drought-tolerant and provides many non-food applications. Harvesting of the enset plant, preparing for fermentation and food preparations follow the traditional route by using the indigenous knowledge and practices. Limited studies have been reported on the microbiology of the enset fermentation, but various types of microbes have been reported. In case of nutritional composition, foods from enset are reported to contain high carbohydrate and minerals content, such as calcium, potassium and zinc, but limited protein content; they are also the best source of the essential amino acids such as lysine and leucine. Limited data are available on vitamins, anti-oxidant and fatty acids profiles of enset-based foods. The existing data indicate variations, and the reasons for variability are discussed in this paper.

Scientific reviews on enset food nutrition profile and related issues are scarce; this paper will compile information about enset plant-based foods for researchers for their future research.

This study aims to assess the effect of water variation on bioethanol production from cassava peels (CP) using Saccharomyces cerevisiae yeast as the ethanologenic agent.

The milled CP was divided into three treatment groups in a small-scale flask experiment where each 20 g CP was subjected to two-stage hydrolysis. Different amount of water was added to the fermentation process of CP. The fermented samples were collected every 24 h for various analyses.

The results of the fermentation revealed that the highest ethanol productivity and fermentation efficiency was obtained at 17.38 ± 0.30% and 0.139 ± 0.003 gL⁻¹ h⁻¹. The study affirmed that ethanol production was increased for the addition of water up to 35% for the CP hydrolysate process.

The finding of this study demonstrates that S. cerevisiae is the key player in industrial ethanol production among a variety of yeasts that produce ethanol through sugar fermentation. In order to design truly sustainable processes, it should be expanded to include a thorough analysis and the gradual scaling-up of this process to an industrial level.

This paper is an original research work dealing with bioethanol production from CP using S. cerevisiae microbe.

1. Hydrolysis of cassava peels using 13.1 M H₂SO₄ at 100 ^oC for 110 min gave high Glucose productivity

2. Highest ethanol production was obtained at 72 h of fermentation using Saccharomyces cerevisiae

3. Optimal bioethanol concentration and yield were obtained at a hydration level of 35% agitation

4. Highest ethanol productivity and fermentation efficiency were 17.3%, 0.139 g.L⁻¹.h⁻¹

Hydrolysis of cassava peels using 13.1 M H₂SO₄ at 100 ^oC for 110 min gave high Glucose productivity

Highest ethanol production was obtained at 72 h of fermentation using Saccharomyces cerevisiae

Optimal bioethanol concentration and yield were obtained at a hydration level of 35% agitation

Highest ethanol productivity and fermentation efficiency were 17.3%, 0.139 g.L⁻¹.h⁻¹

1. From the information given to the Committee by members of the trade the following conclusions were drawn : (i) Four main types of product are sold under a name commonly including the word “vinegar,” namely (a) the product of the alcoholic and acetous fermentation of a saccharine liquid, the sugars in which are derived entirely or mainly from the saccharification of starch by the diastase of malt; (b) the product obtained by the distillation of (a); (c) the product of the acetous fermentation of a distilled alcoholic fluid; (d) the product, with or without colouring and/or flavouring matter, obtained by diluting acetic acid to an appropriate strength. In addition, strong acetic acid is available in various strengths, with or without added colouring and/or flavouring matter, labelled in various ways to indicate relationship with vinegar, (ii) The commonly accepted minimum standard for the purposes of the Food and Drugs Act is 4 per cent. w/v of acetic acid. (iii) Malt Vinegar as obtained by the brewing process may contain up to 8 per cent. w/v of acetic acid. This is diluted to the required strength and three strengths are commonly recognised in the trade, being known respectively as Nos. 16, 20 and 24, which correspond approximately to acetic acid contents of 4, 5 and 6 per cent. w/v. (iv) Malt vinegar as generally sold from bulk is the No. 16 quality and contains from 4 to about 4·75 per cent. w/v of acetic acid. That sold in bottles is usually the No. 20 quality, but there is also a small sale to the public of No. 24 quality. (v) The colouring matter commonly used in vinegar is caramel, although one or two manufacturers, probably as a result of the present shortage of caramel, may use other colouring matters. (vi) The value of brewed vinegar as a condiment does not depend solely upon the acetic acid content. Other constituents add body and aroma while some have a buffering effect which makes the product less sharp to the taste than a dilution of acetic acid containing the same proportion of free acid. (vii) Dilute solutions of acetic acid, with or without added colour and/or flavour, are now commonly sold under the name “non‐brewed vinegar” and are sometimes preferred for pickling purposes and for use on fried fish. (viii) The acetic acid content of such solutions, as usually sold, falls within the range of 4 to 5 per cent. w/v. (ix) Concentrated products, often known as “vinegar essence,” frequently contain about 50 per cent. w/v of acetic acid and before use require dilution with eleven times their volume of water; products are also available which require to be diluted with as much as 17 or as little as 5 times their volume of water. (x) An excise licence is required by any person “who shall make, prepare, extract, distil, purify or sell any liquors prepared or capable of being used or applied to the purposes of vinegar or acetous acid made for sale, not being a dealer in or retailer or seller of such vinegar or acetous acid only.” An unlicensed person cannot lawfully produce artificial or non‐brewed vinegar by adding colouring matter to the liquid obtained by diluting strong acetic acid. 2. In normal times malt vinegar is prepared by the alcoholic and acetous fermentation of an infusion of malted barley with unmalted barley and with or without other cereals. The process of manufacture is characterised by the fact that the starch in the cereals is converted into sugars by the action of the diastase in the malt prior to the fermentation processes. An element of complication has, however, been introduced into the framing of a definition as a result of war‐time difficulties. In 1942, in order to secure an increased output of “malt vinegar,” the Ministry of Food approved the addition of sugar to the wort. The amount that may be added must not exceed 15 per cent. of the sugars present in the wort as a result of the action of diastase on the starch, but since the sugars in the infusion which undergoes fermentation are no longer derived entirely from the starch by the hydrolytic action of the diastase of malt, the product no longer conforms to what the Committee would regard as the appropriate peacetime definition of malt vinegar. It was stated by the manufacturers that the analytical characterisations of the vinegar obtained in this way arc within the range appropriate to genuine malt vinegar of peacetime quality, and that no difference is detectable by the ordinary user. The Committee desires, however, to record its view that this use of sugar should be regarded as a war‐time expedient and should be discontinued as soon as the requisite cereals are again in full supply. 3. Distilled vinegar is prepared, as the name implies, by distilling vinegar. It is understood that the only distilled vinegar now on the market in this country is that prepared by the distillation of malt vinegar, and the Committee recommends that the name “distilled vinegar” without any further qualification should be applied only to distilled malt vinegar. 4. Spirit vinegar is prepared by the acetous fermentation of a distilled alcoholic liquid. As thus prepared it contains about 10 per cent. weight in volume of acetic acid and for retail sale it is commonly diluted to a strength of 4 to 5 per cent. 5. The nomenclature of the products obtained by diluting acetic acid, with or without the addition of colour, has been a matter of controversy in the vinegar trade for many years, and the Committee received representations on the subject on behalf of the Malt Vinegar Brewers‘ Federation and the Association of Non‐Brewed Vinegar Manufacturers. 6. The Malt Vinegar Brewers' Federation, while advocating that these products should be known as “artificial” or “imitation” vinegar, raised particular objection to the current practice of describing them as “non‐brewed vinegar.” Their argument was that the term is misleading as to the source, nature, substance and quality of the article and that its use on a label is an offence under Section 6 of the Food and Drugs Act, 1938 (since replaced by Regulation 1 of the Defence (Sale of Food) Regulations, 1943). It was claimed that the term indicated merely that a mashtun had not been used in the manufacture of the product and that it might be applied with equal propriety to other kinds of vinegar, for example, wine vinegar, molasses vinegar, etc. The attention of the Committee was also directed to the fact that in the Dominions and other countries where the labelling of foods is more fully controlled than here, these products are required to be so labelled as clearly to distinguish them from products made by a method which includes a process of acetous fermentation, and reference was made to the statement issued by the Society of Public Analysts and Other Analytical Chemists in 1935, after consultation with the Malt Vinegar Brewers' Federation, recommending the use of the description “artificial” or “imitation.” 7. On behalf of the Association of Non‐Brewed Vinegar Manufacturers it was claimed that the Society of Public Analysts had not consulted them before issuing their statement and that the use of the description “artificial” or “imitation” would have a serious effect on sales since it would convey to the public the idea that the product was inferior to “vinegar.” It was pointed out that the term “vinegar” originally connoted sour wine, and it was suggested that malt vinegar was equally an “imitation” of the original article and also “artificial” in the sense that it is manufactured by a process which is controlled by artificial means. 6. The two trade organisations differed in their statements as to the period during which the term “non‐brewed” had been in use. Whereas the Federation suggested that it had only been used during the last five years, the Association claimed that it had been in use to a gradually increasing extent for at least 20 years and that for more than twelve years they had recommended its use whenever they had been asked to advise in regard to labels. The Association agreed that the general use of the name by manufacturers dated from the case of Sutton v. Tame which came before the County of London Sessions Appeals Committee in 1937 and which is generally regarded in the trade as a test case on the nomenclature of vinegar. The proceedings were originally instituted under Section 2 of the Food and Drugs (Adulteration) Act, 1928, as the result of a sale of coloured diluted acetic acid when “table vinegar” was demanded. After hearing much evidence from both sides the Appeals Committee decided that the sale of a substance as “vinegar” or “table vinegar” without any qualification or explanation as to its origin being given by the seller to the purchaser implied that the product had been produced by a process of fermentation. In announcing this decision, the Chairman of the Appeals Committee remarked that “the fact that a very large majority of manufacturers add such words as ‘wood,’ ‘non‐brewed’ or similar words of that description to the products shows, in the opinion of the Committee, that the words “table vinegar” are not considered by the custom of the trade sufficient to describe it.” (Analyst, 1937, 62, 607.) 9. The manufacturers of the products consisting of diluted acetic acid have regarded these remarks as justifying the use of the name “non‐brewed vinegar,” but the Committee was informed on behalf of the malt vinegar brewers that this interpretation was not accepted by them and that had it not been for the war they would have taken all possible steps to challenge the name under the provisions of Section 6 of the Food and Drugs Act, 1938. The present position, however, according to the evidence available to the Committee, is that practically all manufacturers of the product are using the description “non‐brewed” on labels, and that the quantity sold is nearly equal to that of malt vinegar. 10. In reviewing the various arguments put before it the Committee has primarily had regard to the protection of the consuming public. If “non‐brewed vinegar” was about to be marketed for the first time the Committee would have considered that the description “artificial vinegar” was more appropriate than “non‐brewed vinegar,” and better calculated to convey to the public the idea of a product which embodies some, but not all, of the properties of malt vinegar. On the other hand, the Committee feels bound to take cognisance of the fact that the description “non‐brewed” has been in use to a greater or lesser extent for several years; that the description did not attract any adverse comment from the Chairman of the London Sessions Appeals Committee in 1937; and that no instance of a successful prosecution under Section 30 (1) of the Food and Drugs (Adulteration) Act, 1928, or Section 6 of the Food and Drugs Act, 1938, has been brought to its notice. The description “non‐brewed” probably conveys no more to the general public than that the product is something different from malt vinegar, but the Committee would hesitate to say that the description is misleading. 11. In short, it appears to the Committee that the importance of the description attached to this product can easily be exaggerated, and that if, as it suspects, the term “non‐brewed” conveys little to the general public the proper remedy is better instruction. It is suggested that the publication of a simple and impartial statement of the facts would help them to appreciate the nature, substance and quality of the different types of vinegar on the market. For the purpose of this report, therefore, and in the absence of an authoritative ruling as to the appropriate designation of the product, the Committee has adopted the alternative descriptions “artificial vinegar” or “non‐brewed vinegar.” 12. In regard to the nomenclature of solutions of acetic acid of strengths in excess of that suitable, without further dilution, for use as vinegar, it was suggested to the Committee that for the protection of the public it was desirable that such preparations should not be described by any designation incorporating the word “vinegar,” however qualified. Names such as “edible acetic acid,” or “acetic acid of edible quality” were put forward as suitable alternatives, but they are open to the suggestion that only those with technical knowledge would appreciate their significance. To the majority of persons the adjective “edible” would convey the impression that preparations so labelled are suitable for use without further dilution, whereas, in fact, they have hitherto commonly contained 50 per cent. of acetic acid and sometimes considerably more. On the other hand, it was urged that the chief purchasers of those products are fish fryers, who are thoroughly familiar with their use and that it would be unreasonable to prohibit the inclusion of the word “vinegar” in the name of a product which on dilution gives a liquid identical with that frequently sold under the name “non‐brewed vinegar.” The essential requirement is that the user should appreciate that the product is not suitable for use in the form in which it is purchased, and that he should know exactly how to dilute it to the appropriate strength. 13. The Committee was informed that several of these products are at present sold without any indication on the label of the extent to which they should be diluted before use. Although the matter is not strictly within its terms of reference, the Committee wishes to record its opinion that such information should be required to appear on labels, particularly since there is considerable variation in the strengths of the products now on the market. In the opinion of the Committee, vague directions such as “Dilute to taste” are not a sufficient protection. 14. A further aspect of the sale of concentrated products to which the attention of the Committee was directed was the danger that may arise from distribution to the public in small bottles. Although, again, the matter may not be strictly within its terms of reference the Committee suggests that consideration might well be given to prohibiting such sales provided interference with the legitimate sale of the higher concentrations of acetic acid, labelled as such, can be avoided. It would also be a further safeguard if all these products were required to conform to a single standard of strength and it is suggested that a strength of from 50 to 60 per cent. weight in volume would be appropriate. 15. If on further examination it is found practicable to give effect to those suggestions, there will be less necessity to rely on the name given to the product to secure adequate protection. Among the names at present in use are “Vinegar Essence,” “Concentrated Vinegar Essence,” “Wood Vinegar Essence” and “Non‐Brewed Vinegar Essence”; there are also a number of products sold under proprietary names, most of which suggest some association with vinegar. The Committee is of the opinion that the statement made by the Chairman of the London Sessions Appeals Committee in the case referred to above, to the effect that the name “Vinegar” without qualification indicates a product obtained by fermentation, is equally applicable to the concentrated preparations. It therefore considers that the name “Vinegar Essence” is misleading. In this report the descriptions “concentrated artificial vinegar” or “concentrated non‐brewed vinegar” have been adopted corresponding to the descriptions adopted for dilute solutions. The Committee recommends that products sold under a proprietary trade name should be required to use one of those descriptions either in addition to or instead of the trade name. 16. The Committee accordingly recommends the following definitions for the various descriptions of vinegar : “Malt Vinegar” means the product containing not less than 4 per cent. weight in volume of acetic acid, CH3.COOH, made by the alcoholic and subsequent acetous fermentation without intermediate distillation of an infusion of malted barley with or without unmalted barley or other cereals, the starch of which has been saccharified by the diastase of malt; and includes the product obtained by fermentation of a cereal infusion as aforesaid to which infusion has been added sugar in amount not exceeding 15 per cent. of the sugars present in the infusion as a result of the saccharification by the diastase of malt. It may contain added colouring matter. “Artificial Vinegar” or “Non‐Brewed Vinegar” means a solution of acetic acid of edible quality, with or without added colouring and/or flavouring matter, containing not less than 4 per cent. weight in volume and not more than 8 per cent. weight in volume of acetic acid, CH3.COOH, the acid not being wholly produced by a process of acetous fermentation; but does not include such a solution containing neither colouring nor flavouring matter unless so sold or described as to lend an intending purchaser to believe that he is purchasing a description of vinegar. “Concentrated Artificial Vinegar” or “Concentrated Non‐Brewed Vinegar” means a solution of acetic acid of edible quality, with or without added colouring and/or flavouring matter, containing not less than 50 per cent. and not more than 60 per cent. weight in volume of acetic acid CH3.COOH, the acid not being wholly produced by a process of acetous fermentation; but does not include such a solution containing neither colouring nor flavouring matter unless so sold or described as to lead an intending purchaser to believe that he is purchasing a description of concentrated vinegar. “Spirit Vinegar” means the product, with or without added colouring matter and containing not less than 4 per cent. and not more than 15 per cent. weight in volume of acetic acid, CH3.COOH, obtained by the acetous fermentation of a distilled alcoholic liquid. “Distilled Vinegar” means the product, with or without added colouring matter and containing not less than 4 per cent. weight in volume of acetic acid, CH3.COOH, obtained by the distribution of malt vinegar.